JP2010274204A - Coating material collecting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such the problem that one of the problems of an existing coating booth system is caused by circulation water interposed for recovering scattered mist and though there is a dry scattered mist recovery system for collecting the scattered mist in a dry state where the circulation water is not used in order to suppress a running cost and to reduce the environmental load, it has defects that recovery ability is low and complicated maintenance is required to stabilize the function. <P>SOLUTION: The dry scattered mist recovery system collects large sized mist by a collision type gas-liquid separation means in a former stage and small sized mist by a filtration type gas-liquid separation means in a latter stage. The former stage comprises a discharged air accelerating means for accelerating discharge speed, the collision type gas-liquid separation means for collecting the large sized mist while facing the discharged air stream, a separated liquid collecting means for collecting a separated coating liquid, and a collision type gas-liquid separation housing including these means. The arrangement or the shape of these means are examined and an optimum condition to enhance the collection efficiency is selected. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention efficiently separates scattered mist from air containing scattered mist that includes scattered mist that has not adhered to the object to be coated in a painting booth in which the paint is sprayed onto the object to be painted in the form of a mist. It is related to the painting system.

The painting system for painting automobile bodies, etc., paints that have been misted by a painting machine while flowing air-conditioned air from the air supply chamber provided upstream of the painting booth through the filter to the painting chamber. The film is sprayed toward the surface to adhere a coating film having a uniform film thickness to the object to be coated.
Air containing scattered mist that has been oversprayed without being attached to the object to be painted is guided outside the booth (downstream), and the scattered mist is collected and collected by the scattered mist collecting means provided there. Thus, only clean air is discharged outside or recirculated to the paint booth supply air.
With this configuration, problems such as the deterioration of the environment surrounding the painting booth, the deterioration of the working environment in the painting chamber, the poor quality of the object to be coated due to the recirculation of the paint mist and the imbalance of the booth airflow are solved.

  Japanese Patent Laid-Open No. 6-254454 shown in FIGS. 20 and 21 is a conventional mist collecting system for a wet paint booth. As shown here, the wet scattering mist recovery system includes a painting chamber 1 of a painting booth and an exhaust treatment chamber 2 immediately below. Below the floor of the painting chamber is a water storage tank 3, a swash plate 4, a narrow gap 5, a water reservoir 6, a first venturi 11, a downstream second venturi 14, baffles 16 and 17, and an air supply fan for supplying air and water. 21. Venturi increases the chances of gas-liquid contact by making the circulating water mist, and increases the efficiency of the scattered mist recovery from the air containing the scattered mist. The first venturi 11 atomizes the circulating water into particles having a relatively large particle diameter, captures a paint mist having a large particle diameter, and the second venturi 14 atomizes the circulating water into particles having a small particle diameter, thereby reducing the particle diameter. Capturing paint mist. Further downstream, the baffles 16 and 17 are installed in the path of the mixture of water particles and exhaust that encloses the paint mist, and the mixture is then passed through the path configured in a zigzag so that the water containing the paint mist is contained. The particles are absorbed by the circulating water film and only the purified exhaust is discharged to the outside.

Japanese Patent Application Laid-Open No. 2009-28586 shown in FIGS. 14 and 15 is a conventional dry painting booth that does not use circulating water, and is a painting chamber 4, an air collecting member 21, an exhaust pipe 22, an exhaust chamber 6, and a paint collection. And an exhaust duct 18. Of the paint atomized in the coating chamber 4, the contaminated air containing the surplus atomized paint that does not adhere to the object to be coated is accelerated by the air collecting member 21 disposed below, and is discharged to the exhaust chamber 6 by the exhaust pipe 22. Discharged. The paint collector 23 installed in the exhaust chamber 6 is provided with a bottom 25, a side wall 26, and an edge 27, and the excess atomized paint adheres to each part in the paint collector 23 by being sprayed at substantially right angles. As a result, the paint is separated from the contaminated air, and the purified air is discharged from the exhaust duct 18 to the outside of the exhaust chamber 6.

Japanese Patent Application Laid-Open No. 2003-275640 shown in FIGS. 16, 17, 18, and 19 is a conventional dry painting booth that does not use circulating water, and is a painting work unit 2, a paint collection unit 3, a collection box 7a, and an exhaust fan 7b. Consists of. In the paint recovery unit, three types of capture members are opposed at a predetermined angle to the flowing down and deflected exhaust flow sucked from the painting work unit 2 by the exhaust fan 7b at the most downstream, The paint mist mixed in the flow is collected. The lowest part of the paint recovery unit 3 has a paint recovery port 3f, and the liquid paint recovered by the paint recovery unit 3 is sent to the recovery tank 6 from the paint recovery port 3f.
Most of the paint mist is removed by the paint recovery unit 3, and an exhaust flow containing a small amount of paint mist is sucked out of the paint recovery unit 3 from an exhaust port 3e located below the capturing member.
The collection box 7a downstream of the paint collection unit 3 contains a multi-layer filter 3g, and the exhaust flow that passed through the paint collection unit 3 passed through the filter 3g, and was not completely captured by the paint collection unit 3. A small amount of paint mist is completely adsorbed and removed.

The following patent document discloses a painting facility that separates and collects scattered mist from the exhaust of the coating booth (scattered mist-containing air) including scattered mist that has not adhered to the object.
JP 2009-28586 A JP 2003-275640 A Japanese translation of PCT publication No. 2008-536661 JP 2001-300370 A JP 50-465 A JP-A-6-254453 JP, 3-98665, A Although it is not a painting booth, the similar technique for separating washing liquid and washing air of a coating machine and collecting washing waste liquid at the time of paint color change in a painting factory is described in the following documents. It is disclosed. JP 2003-80132 A

  By the way, in the wet booth painting system that has been used in many painting booths in the past, after collecting scattered mist through circulating water, it is separated into gas and liquid, and only clean air is discharged or clean air is air-conditioned to the painting booth. It is configured to recirculate. In this wet booth painting system, the surface area is increased as much as possible, for example, by circulating water, and the opportunity for gas-liquid contact is increased by making it collide with air containing the scattered mist. It has become.

However, the wet booth coating system has the following problems, and this is an important issue.
A series of systems ranging from scattered mist collection, water circulation, and separation / recovery of paint components are considerably larger, which increases the size of the equipment and increases the initial investment.
In order to reduce the energy related to the operation of the painting booth, it is considered effective to return the exhausted booth air to the booth again (recirculation), but the booth air was cleaned with the wet booth painting system. In this case, a large amount of moisture is mixed into the recirculated air in the cleaning process, and new large energy is required for the air conditioning (cooling dehumidification to heating) including this dehumidification, and a large operation cost is required.
Water circulation spans a long path distance to the circulating water treatment system in large quantities, and the power energy cost used for this is enormous.
In order to continuously and stably separate the paint components from the circulating water, it is necessary to continue to supply a sufficient amount of chemicals for separation, and the daily chemical costs and management costs required for this are large. .
However, even with chemicals, some paint components that cannot be removed remain in the circulating water and accumulate gradually, so that it is necessary to replace all the liquids at regular intervals for this purpose. . The processing cost for this is enormous. This also produces a large amount of contaminated water, which is undesirable from an environmental point of view.

On the other hand, the dry booth painting system does not use circulating water, but the scattered mist-containing air containing the scattered mist is made to collide with the inertial collision separation plate or filtered with a multi-layer filtration filter. It is configured such that it is liquefied and collected by adhering to a solid, and only the cleaned air is discharged or recirculated to the painting booth.

Also in the example of the dry booth coating system disclosed in Japanese Patent Application Laid-Open No. 2009-28586, the position and configuration of the air collecting member 21, the exhaust pipe 22, and the paint collector 23 with respect to the total air supply amount, the scattering mist and the paint collector 23 The collision speed is determined, and as a result, the ability to collect scattered mist is determined. On the other hand, due to the constraint that the ventilation pressure loss is kept below a certain level, maintenance corresponding to performance deterioration due to fouling is required, and all of these still have problems for further improvement. In general, the dry booth painting system can be configured more simply than the above-mentioned wet booth painting system, but on the other hand, it has a low ability that cannot be said to be sufficient in terms of the recovery ability (mist removal efficiency) of the scattered mist. There are many problems in maintenance such as stability. For this reason, dry booth painting systems are often limited to simple systems.

In summary, the dry booth painting system has the following problems.
Compared to the wet booth painting system that collects scattered mist by atomizing water, the dry booth coating system does not provide sufficient opportunities for contact with the scattered mist and does not sufficiently increase the recovery ability (mist removal efficiency) of the scattered mist. There are many cases.
When scattered mist adheres to and accumulates on the inertial collision separator and filter, the loss of airflow pressure gradually increases and the air supply balance in the paint booth is disrupted, which is the cause of hindering the stability of paint quality. Further, in order to prevent this, it is necessary to clean and replace the contaminated part after operation for a certain period of time, but this requires complicated maintenance work and maintenance costs accordingly.

The present invention has been made in view of the above problems, and its purpose is to suppress initial investment and running costs while maintaining and ensuring sufficient mist collection capability and stability of the collection function, and to reduce environmental impact. Is to provide a low booth painting system.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a coating means for spraying a coating material in a mist state while flowing air-conditioned air in a fixed direction, and a coating means; In order to discharge the coating mist-containing air to the outside of the coating equipment casing and the coating equipment casing surrounding the coating equipment casing surrounding the coating equipment and the spraying mist-containing air that did not adhere to the coating object among the paint sprayed from the coating means A scattering mist-containing air exhaust space for collecting the scattered mist-containing air; and a discharge air acceleration means connected to the scattering mist-containing air exhaust space and straightened while increasing the discharge speed of the scattered mist-containing air to rectify the scattered mist-containing air. A collision-type gas-liquid separation means that separates the mist and air by attaching the large-particle-size scattering mist by colliding with the air containing the scattered mist whose discharge speed has been increased; A collision type gas-liquid separation housing containing the liquid gathering means and the terminal part of the discharge air accelerating means; and a collision type gas-liquid separation means arranged below the collision type gas-liquid separation means inside the collision type gas-liquid separation case. Separating liquid collecting means for collecting the paint liquid separated by gas and liquid, and the scattered mist-containing air discharged downstream of the scattered mist-containing air discharge opening, thereby separating the small particle size scattered mist and air. In a coating system having filtration type gas-liquid separation means, inside the collision-type gas-liquid separation housing, there is a separation liquid collecting means at the bottom, a collision type gas-liquid separation means at the middle, and an air discharge opening containing scattered mist at the top. The exhaust air accelerating means is disposed through the air mist-containing air discharge opening, and the exhaust air accelerating means is preferably a collision type gas-liquid so that the diameter reduction ratio of the downstream portion is smaller than that of the upstream portion. Outside the separation housing From the upstream position where it is located to the downstream position where the collision type gas-liquid separation housing is located, the ventilation cross-sectional area is gradually reduced so that the downstream diameter reduction ratio is smaller than that of the upstream portion, and the exhaust air acceleration means Arranged in close proximity to the collision plate surface of the first collision type gas-liquid separation means with respect to the end portion air flow direction, the second collision on the extension of the collision plate surface of the first collision type gas-liquid separation means The collision plate surface of the gas-liquid separation means is arranged in a directly-facing manner. As a result, the function of collecting highly efficient paint booth scattering mist can be achieved without using circulating water, so that it is possible to provide a system with low running cost and low environmental load with little initial capital investment.

According to a second aspect of the present invention, there is provided a coating means for performing coating by spraying a coating material in a mist state while flowing air-conditioned air in a certain direction, a coating means, a coating object, and the coating means. Of the sprayed paint, the coating equipment enclosure that surrounds the scattered mist-containing air that did not adhere to the object to be painted, and the scattering that collects the scattered mist-containing air to discharge the scattered mist-containing air to the outside of the coating equipment casing A discharge air accelerating means connected to the mist-containing air exhaust space and the scattered mist-containing air exhaust space, straightening while increasing the discharge speed of the scattered mist-containing air, and discharging speed by the discharge air acceleration means The collision type guiding means for deflecting the scattered mist-containing air that has been raised, and the large-particle-size scattered mist is adhered by colliding with the scattered mist-containing air whose discharge speed has been increased. Separating collision type gas-liquid separating means, and a separating liquid arranged below the collision type gas-liquid separating means inside the collision-type gas-liquid separating housing and collecting the coating liquid separated by the collision-type gas-liquid separating means Collecting means, collision-type guiding means, collision-type gas-liquid separation means, and collision-type gas-liquid separation housing containing the separation liquid collecting means, and filtering the scattered mist-containing air discharged downstream of the scattered mist-containing air discharge opening In the coating system having the filtration type gas-liquid separation means for separating the small particle size scattering mist and the air, the collision type gas-liquid separation means and the separation liquid collecting means are included, and the ventilation direction with respect to the discharge air acceleration means Collision type gas-liquid separation housing that can move in the direction perpendicular to the inside of the collision-type gas-liquid separation housing, the separation liquid collecting means at the lowest position, the collision type gas-liquid guide means at the middle, and the scattering at the uppermost position Mist-containing air discharge opening is arranged The exhaust air accelerating means is preferably located inside the collision type gas-liquid separation housing from the upstream portion located outside the collision type gas-liquid separation housing so that the diameter reduction ratio of the downstream portion is smaller than that of the upstream portion. Collision in which the ventilation cross-sectional area is gradually reduced so that the downstream diameter reduction ratio is smaller than that of the upstream area up to the downstream part, and the inclination is arranged at an angle of approximately 60 degrees or less with respect to the flow direction in the vicinity of the discharge air acceleration means. The air flow discharged from the end portion of the air accelerating means is deflected in the direction along the surface of the collision type guiding means by the mold guiding means and collides with the first collision type gas-liquid separation means. As a result, the restriction on the arrangement of the collision type gas-liquid separation housing with respect to the exhaust air acceleration means is reduced, so that the high-efficiency paint booth mist is collected without using circulating water while having a higher degree of freedom of arrangement. The function is achieved, and the collection and cleaning from the collision type gas-liquid separation casing are facilitated.

According to a third aspect of the present invention, there is provided a coating means for performing coating by spraying a coating material in a mist state while flowing outside air or air-conditioned air in a certain direction, the coating means, the coating object, The coating equipment casing that surrounds the sprayed mist-containing air that has not adhered to the object to be painted among the paint sprayed from the coating means, and the scattered mist-containing air to discharge the scattered mist-containing air to the outside of the coating equipment casing Spattering mist-containing air exhaust space that collects air, exhaust air accelerating means connected to the scattering mist-containing air exhaust space, straightening while increasing the discharge speed of the scattering mist-containing air, and increasing the discharge speed In addition, a collision type gas-liquid separation means for separating a mist and air by adhering a large particle size scattering mist by colliding with the air containing the scattering mist, a collision type gas-liquid separation means, and a separating liquid collecting hand And a collision-type gas-liquid separation housing containing the terminal portion of the exhaust air acceleration means, and the collision-type gas-liquid separation means disposed below the collision-type gas-liquid separation means inside the collision-type gas-liquid separation means. Separation liquid collecting means for collecting the separated coating liquid and filtration type air for separating the small particle size scattered mist and air by filtering the scattered mist-containing air discharged downstream of the scattered mist-containing air discharge opening. In the coating system having the liquid separation means, in the collision type gas-liquid separation housing, the separation liquid collecting means is arranged at the lowest position, the first collision type gas-liquid separation means and the scattered mist-containing air discharge opening are arranged in the middle, The exhaust air acceleration means is installed horizontally through the scattered mist-containing air discharge opening, and the exhaust air acceleration means is preferably a collision-type gas-liquid separation so that the diameter reduction ratio of the downstream portion is smaller than that of the upstream portion. Located outside the housing From the upstream part to the downstream part located inside the collision-type gas-liquid separation housing, gradually reduce the ventilation cross-sectional area so that the downstream diameter reduction ratio is smaller than that of the upstream part, containing the object to be coated and scattering mist Air exhaust space and exhaust air acceleration means are installed on a horizontal line,
Alternatively, the object to be coated and the air exhaust space containing scattered mist are installed on a horizontal line.
Thereby, a simpler horizontal arrangement type dry booth can be configured in a compact manner, and even in that case, sufficient scattering mist collection can be achieved.

The invention according to claim 4 is a coating means for performing coating by spraying the coating material in a mist state while flowing outside air or air-conditioned air in a certain direction, the coating means, the coating object, The coating equipment casing that surrounds the sprayed mist-containing air that has not adhered to the object to be painted among the paint sprayed from the coating means, and the scattered mist-containing air to discharge the scattered mist-containing air to the outside of the coating equipment casing Spattering mist-containing air exhaust space that collects air, exhaust air accelerating means connected to the scattering mist-containing air exhaust space, straightening while increasing the discharge speed of the scattering mist-containing air, and increasing the discharge speed In addition, a collision type gas-liquid separation means for separating a mist and air by adhering a large particle size scattering mist by colliding with the air containing the scattering mist, a collision type gas-liquid separation means, and a separating liquid collecting hand And a collision-type gas-liquid separation housing containing the terminal portion of the exhaust air acceleration means, and the collision-type gas-liquid separation means disposed below the collision-type gas-liquid separation means inside the collision-type gas-liquid separation means. Separation liquid collecting means for collecting the separated coating liquid and filtration type air for separating the small particle size scattered mist and air by filtering the scattered mist-containing air discharged downstream of the scattered mist-containing air discharge opening. In the coating system having the liquid separation means, the separation liquid collecting means at the bottom, the collision type gas-liquid separation means at the middle, and the air discharge opening containing the scattered mist at the top in the collision type gas-liquid separation housing, The exhaust air accelerating means is installed vertically through the air discharge opening containing the scattered mist, and the exhaust air accelerating means is preferably a collision type gas-liquid separation so that the diameter reduction ratio of the downstream part is smaller than that of the upstream part. Located outside the housing From the upstream part to the downstream part located inside the collision-type gas-liquid separation housing, the ventilation cross-sectional area is gradually reduced so that the diameter reduction ratio of the downstream part is smaller than that of the upstream part. The contained air exhaust space is installed on a horizontal straight line, and the exhaust air accelerating means is vertically connected below the scattered mist containing air exhaust space. Thereby, a simpler horizontal arrangement type dry booth can be configured in a compact manner, and even in that case, sufficient scattering mist collection can be achieved.

A fifth aspect of the present invention is the coating system according to any one of the first to fourth aspects, wherein the guide means for forming the air exhaust space containing the scattered mist, the exhaust air acceleration means arranged substantially horizontally or vertically, and the collision type gas-liquid A filtration type gas-liquid separation means disposed downstream of the separation means, and a scattering mist-containing air discharge opening for discharging the scattered mist-containing air colliding with the collision-type gas-liquid separation means to the outside of the collision-type gas-liquid separation housing. Splashing mist from the inside of the collision type gas-liquid separation housing along the surface of the guide means that forms the air exhaust space containing scattering mist, or along the opposite surface of the surface of the exhaust air acceleration means used during exhaust air acceleration The scattered mist-containing air discharged to the filtration type gas-liquid separation means through the contained air discharge opening is smoothly deflected and guided toward the filtration type gas-liquid separation means side. As a result, it is possible to expect a compact dry coating booth configuration with a high degree of freedom in accordance with system constraints while performing high efficiency separation of scattered mist from the air containing mist.

Invention of Claim 6 is the coating system of Claims 1-4,
In the traveling direction of the scattered mist-containing air, the exhaust air accelerating means reduces the diameter so that the diameter reduction ratio of the upstream portion is larger than the downstream portion, and the length of the traveling direction is the short diameter of the discharge portion. As described above, the distance of the first collision-type gas-liquid separation means that is preferably at least twice the short diameter and directly faces the tip of the discharge part is in the range of 3 to 40 cm, preferably 5 to 15 cm from the measurement result graph of FIG. It is a range. This makes it possible for rectified high-speed scattered mist-containing air to accurately collide with the first collision-type gas-liquid separation means, achieving a dry paint booth system with high dust collection efficiency while keeping ventilation pressure loss low. It is what is done.

A seventh aspect of the present invention is the coating system according to any one of the first to fourth aspects, wherein the first collision-type gas-liquid separation means among the collision-type gas-liquid separation means disposed inside the collision-type gas-liquid separation housing. And the second collision-type gas-liquid separation means, or the first collision-type gas-liquid separation means, in a position separated from the wall surface inside the collision-type gas-liquid separation housing, This is a face-to-face arrangement. This achieves a dry paint booth system with high dust collection efficiency while keeping the air pressure loss low.

The invention according to claim 8 is the coating system according to any one of claims 1 to 4, wherein the air containing the scattered mist discharged from the exhaust air acceleration means at an increased discharge speed or the scattered mist deflected by the collision type gas-liquid separation means Separating liquid collecting means for collecting the coating liquid separated from the gas and liquid from the scattered mist is provided at a position where the contained air flow does not collide. Thereby, even in the case of a compact collision-type gas-liquid separation casing, re-scattering of the coating liquid collected and collected by the gas-liquid separation by the scattered mist-containing air flow can be effectively prevented.

As described in detail above, the effects of the inventions according to claims 1 to 8 are as follows.
1. 1. High mist collection efficiency as a dry paint booth system by optimal arrangement of exhaust air acceleration means and collision type gas-liquid separation means. 2. A dry paint booth system can be developed for larger automobiles and compact parts. The benefits of the wet dry paint booth system over the wet dry paint booth system are enjoyed without using water, so the system is simple and the initial capital investment is reduced.
Reduces air conditioning energy during exhaust gas recirculation (no need for dehumidification / heating) because no water is used
Since no water is circulated, no motive energy is required for water circulation.
A system and chemicals that continuously extract paint components from circulating water are unnecessary.
There is no need for costs associated with wastewater treatment of circulating water.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(First overall system diagram)
FIG. 1 shows a circulating dry mist recovery system according to the present invention.
As shown in FIG. 1, the circulation type dry scattering mist recovery system includes a coating element 100, a first scattering mist recovery element 200, a second scattering mist recovery element 250, a circulation air conditioning element 300, and an outside air air conditioning element 350. Consists of.

  The configuration of the painting element 100 is provided between the air supply chamber 306 and the interior of the painting equipment casing 104, and the air filtering means 313 for sending clean air to the inside of the painting equipment casing 104, and the object to be painted 101, Coating means 102 for applying paint by spraying the paint in a mist form, and moving means 103 for the coating means such as a painting robot that places the coating means 102 on the different parts of the object 101 to be coated, or the object to be coated A moving object 105 such as a robot that puts 101 on the surface of the object 101 and faces a painting means 102 in which different parts of the object 101 are fixedly arranged, and an object to be carried in and out of the painting equipment housing 104 In the conveying means 105, the painting equipment 101, the painting means 102 and the painting equipment casing 104 surrounding the painting means moving means 103, and the painting equipment casing 104, the painting means 02, the scattered mist-containing air that is on the opposite side (in this case, lower side) across the object 101 and has not adhered to the object 101 is gathered to be discharged to the outside of the coating equipment casing 104. The air exhaust space 106 includes scattered mist.

The operation of the painting element 100 will be described in detail with reference to FIG. The coating means 102 placed on the moving means 103 of the painting means such as a painting robot is made in a mist form with respect to the painting object 101 which is placed on the article conveying means 105 and conveyed inside the painting equipment housing 104. Spraying while moving toward the object 101, a thin coating film is uniformly formed on the surface of the object 101. Although not shown, the painting means 102 is fixed to the painting equipment housing 104, and the painting means 102 is moved while the painting surface of the painting object is moved by placing the painting object 101 on the painting means moving means 150 such as a robot. The paint may be misted and sprayed toward the object 101 to form a uniform thin coating on the surface of the object 101.

On the other hand, a uniform and gentle air flow (booth airflow) flows from the direction of the air supply chamber 306 toward the scattered mist-containing air exhaust space 106 inside the coating equipment casing 104, and the mist-like object is coated. Among the paints sprayed toward the object, the paint that has not adhered to the object 101 is mixed as the scattered mist with the booth airflow inside the coating equipment housing 104 to form the scattered mist-containing air. Collected in the air exhaust space 106.

The configuration of the first scattered mist collecting element 200 includes a guide means 107 for smoothly guiding the scattered mist-containing air collected in the scattered mist-containing air exhaust space 106 to the exhaust air acceleration means, and a lower portion of the guide means 107. As for the discharge path diameter of the scattered mist-containing air, the exhaust air accelerating means 201 that reduces the cross-sectional area of the ventilation at a predetermined rate to increase the discharge speed and the air flow direction of the scattered mist-containing air are installed and accelerated. Below the collision-type gas-liquid separation means 202, 203, 204 and the collision-type gas-liquid separation means 202, 203, 204, which separate the large-particle-size scattering mist from the air by colliding with the air containing the scattered mist later. The separation liquid collecting means 205 for collecting the coating liquid separated by the collision type gas-liquid separation means and the collision type gas-liquid separation means 202, 203, 204 A collision type gas-liquid separation housing 206 containing the liquid collecting means 205; a scattering mist-containing air discharge port 207 for discharging scattered mist-containing air to the outside of the collision-type gas-liquid separation housing 206; and a scattering mist-containing air exhaust. It consists of an air supply opening 208 connected in a sealed state from the outlet 207 and for supplying air to the second scattered mist collecting element 250 on the downstream side.

The operation of the first scattering mist collecting element 200 will be described in detail with reference to FIGS. 1 and 7.
The scattered mist that has not adhered to the object 101 in the painting element 100 is mixed with the booth airflow to become scattered mist-containing air, and gathers in the downstream scattered mist-containing air exhaust space 106. Next, since the passage of the exhaust air acceleration unit 201 is guided by the guide unit 107 and the exhaust air acceleration unit 201 connected to the guide unit 107 and progresses downstream, the scattered mist-containing air passing therethrough Gradually increases the flow rate.

The discharge air acceleration means 201 passes through the scattering mist-containing air discharge port 207 provided in the collision gas-liquid separation casing 206 and enters the collision gas-liquid separation casing 206, and the scattering mist-containing air is rapidly discharged from the end opening. Erupts. For this reason, the possibility that the scattered mist-containing air flow in which the scattered paint mist is not collected is reflected and leaks to the outside of the collision gas-liquid separation housing 206 is avoided. The ratio of the reduced diameter of the passage of the exhaust air acceleration means 201 is preferably from the upstream part located outside the collision type gas-liquid separation housing so that the downstream part has a smaller diameter ratio than its upstream part. Since the vent cross-sectional area is gradually reduced to the downstream part located inside the separation housing so that the diameter reduction ratio of the downstream part becomes smaller than that of the upstream part, the pressure loss related to the acceleration of the exhausted air is kept small. I can do it.

For the collection of the scattered paint mist, the first collision condition with the first collision type gas-liquid separation means 202 arranged in the immediate vicinity of the discharge opening of the discharge air acceleration means 201 is the most important.
The length of the discharge air acceleration means 201 in the feed direction needs to be at least equal to, preferably at least twice as long as the short diameter of the terminal end opening in order to rectify the scattered mist-containing air sent into the collision gas-liquid separation housing 206. The distance between the discharge opening of the air acceleration means 201 and the first collision type gas-liquid separation means 202 is 3 to 40 cm, preferably 5 to 15 cm, so that the balance between the scattering efficiency of the scattered mist and the pressure loss related to ventilation is balanced. It is the range that can be taken. Assuming general vehicle body booth conditions, if the distance between the discharge opening of the discharge air acceleration means 201 and the first collision-type gas-liquid separation means 202 is 5 cm or less, the collection efficiency does not increase for a large pressure loss. It has been experimentally found that the collection efficiency is low at 15 cm or more.

The scattered mist-containing air ejected at high speed collides with the first collision-type gas-liquid separation means 202 disposed in the vicinity of the opening of the discharge air acceleration means 201, and the large-size scattered paint mist is the first collision type. It adheres to the gas-liquid separation means 202 and is collected.
The scattered mist-containing air including the scattered paint mist that has not adhered branches to the left and right along the surface of the first collision type gas-liquid separation means 202 and travels straight as it is to the second collision type gas-liquid separation means (collision). It collides with 203 parts of the gas-liquid separation casing.
Similar to the first collision type gas-liquid separation means 202, a part of the scattered paint mist having a particle size larger than that of air adheres to and is collected by the second collision type gas-liquid separation means 203, and contains the remaining scattered mist. The air branches right and left along the surface of the second collision-type gas-liquid separation means 203, travels straight as it is, and collides with the third collision-type gas-liquid separation means 204 (204 part of the collision gas-liquid separation casing). The remaining scattered paint mist adheres to the third collision type gas-liquid separation means 204 and is collected.

The scattered paint mist adhering to and collected by the collision type gas-liquid separation means 202, 203, and 204 flows downward and gathers inside the collision gas-liquid separation housing 206 due to gravity.
In FIG. 7, a depression is provided in the bottom of the collision gas / liquid separation casing 206 and the scattered paint mist collected as the separation liquid collecting means 205 is collected, but the gist of the present application is not limited to this, and the collision gas / liquid If there is no opening through which the scattered paint mist collected inside the separation casing 206 scatters down and the scattered paint mist collected inside the collision gas-liquid separation casing 206 is stored, the separation liquid collecting means The objective is achieved as 205.
Further, the separation liquid collecting means 205 for storing the scattered paint mist includes not only the scattered mist-containing air ejected from the exhaust air acceleration means 201 at a high speed so as to prevent this re-scattering, but also the collision type gas-liquid separation means 202 and 203. It is important to provide an arrangement or a baffle so that the air containing the scattered mist deflected by the above is not directly applied.

The scattered mist-containing air from which the paint mist having a large particle size has been removed by colliding with the first, second and third collision-type gas-liquid separation means is provided at the uppermost position of the collision-type gas-liquid separation housing 206. The air is discharged to the outside from the scattered mist-containing air discharge opening 207 and sent to the air supply opening 208 for supplying air to the downstream side connected to the scattered mist-containing air discharge opening 207 in a sealed state.
Further, the scattered mist-containing air from which the paint mist having a large particle size has been removed by colliding with the first, second, and third collision-type gas-liquid separation means is at the top of the collision-type gas-liquid separation casing 206. When discharged to the outside through the provided mist-containing air discharge opening 207, the passage of the discharge air accelerating means 201 is reduced in diameter so that the reduction ratio of the downstream portion is smaller than that of the upstream portion. From the upstream part located outside the separation casing 206 to the downstream part located inside the collision-type gas-liquid separation casing 206, the vent cross-sectional area is gradually reduced so that the reduced diameter ratio of the downstream part becomes smaller than the upstream part. Therefore, the scattered mist-containing air discharged from the scattered mist-containing air exhaust space 106 and carried into the collision-type gas-liquid separation casing 206 and the scattered mist-containing air discharged from the collision-type gas-liquid separation casing 206 are Slip without collision It can be discharged crab scattered mist containing air.

The structure of the second scattered mist collecting element 250 includes filtration type gas-liquid separation means 251, 251, 252 and excess type gas-liquid separation means 251, 251 that allow the air containing the scattered mist discharged from the air supply opening 208 to pass therethrough. , 252 holding filtration type gas-liquid separation means frames 254, 255, 256, a filtration type gas-liquid separation case 257 including the filtration type gas-liquid separation means, and a filtration type gas-liquid separation case 257, It consists of maintenance-type opening / closing doors 258 for filtration-type gas / liquid separation means 251, 251 and 252.

The operation of the second scattering mist collecting element 250 will be described in detail with reference to FIGS. 1 and 4, 5, and 6 and the maintenance opening / closing door.
In the first scattered mist collecting element casing, the scattered mist-containing air sent to the air supply opening 208 is sent to the second scattered mist collecting element 250 via the duct 301-1.
In the filtration type gas / liquid separation casing 257 of the second scattering mist collecting element 250, the filtration type gas / liquid separation means frames 254, 255, and 256 are arranged so that the air containing the scattered mist does not flow downstream from other than the filtration surface. By passing through filtered filtration gas-liquid separation means 251, 252, and 253 in order and filtering, the remaining small particle size scattered mist is separated and recovered, and the purified air is supplied to the downstream duct 301-2. To be discharged.
The filtration type gas / liquid separation casing 257 performs maintenance such as replacement, movement, and cleaning of the filtration type gas / liquid separation means 251, 252, and 253 that are clogged by the scattered mist in the separated and collected air containing the scattered mist. A maintenance replacement opening / closing door is provided, and the maintenance replacement opening / closing door 258 is opened at a predetermined time to access the internal filtration type gas-liquid separation means 251, 252, 253.

The configuration of the circulating air / air-conditioning element 300 gives acceleration to the duct 301-2 that sends the air greatly reduced in the amount of scattered mist on the downstream side of the second scattered mist collecting element 250 and the air that is sent to the exhaust fan. An air supply fan 302, a branch point 301-3 that discharges a predetermined ratio of air with a greatly reduced content of scattered mist to the outside, an external discharge branch duct 303, an external discharge adjustment valve 304 that regulates the external discharge amount, and a first An air supply duct 301-4 for supplying air from the second scattered mist collecting element 250 to the coating element 100 side, a circulation air conditioner 305 for air-conditioning the air supplied to the painting element 100 side to a predetermined temperature and humidity, and the circulation air conditioner A circulation air-conditioning fan 308 that is installed on the downstream side of 305 and sucks air from the circulation air-conditioning device 305 and supplies the air to the supply chamber 306.

The operation of the circulation air conditioning element 300 will be described in detail with reference to FIG.
The purified air that passes through the second scattered mist collecting element 250 and is discharged from the duct 301-2 is accelerated by the exhaust fan 302, and is partially discharged at the branch point 301-3, the external discharge branch duct 303, and the discharge. It is discharged to the outside through the adjustment valve 304.
The amount which is branched to the discharge side at branch point 301-3 and discharged to the outside is adjusted by an outside air discharge adjustment valve and is about 5 to 20% of the total amount, and the first scattering mist contained in the circulating air The concentration of the volatile organic compound (VOC) that cannot be removed and recovered by the recovery element 200 and the second scattered mist recovery element 250 is adjusted so as not to be higher than a certain level.
The purified air branched to the circulation side at the branch point 301-3 is adjusted in temperature and humidity by the circulation air conditioner 305 via the duct 301-4 and then accelerated by the circulation air conditioning fan 308 to be supplied into the air supply chamber. It returns to 306.

The configuration of the outside air conditioning element 350 installed in parallel with the circulation air conditioner 305 includes an outside air introduction opening 351 for introducing outside air toward the air supply chamber 306, and outside air introduced downstream of the outside air introduction means at a predetermined temperature. An outside air conditioning device 352 that adjusts to humidity and an outside air conditioning fan 353 that is installed on the downstream side of the outside air conditioning device 352 and sends air to the supply chamber 306.

The operation of the outside air conditioning element 350 will be described in detail with reference to FIG.
The fresh air sucked from the outside air introduction means 351 opened outside the route of the paint circulation air is adjusted in temperature and humidity by the outside air air conditioner 352 and accelerated by an outside air air conditioning fan installed downstream thereof into the air supply chamber 306. It is sent. The amount of air introduced here is substantially equal to the amount released outside through the branch point 301-3, the external discharge branch duct 303, and the discharge adjustment valve 304, and the air pressure balance inside the coating chamber housing 104 is balanced. I keep it.

(Second overall system diagram)
FIG. 2 shows another embodiment of the present invention, a discharge-type dry mist recovery system.
It consists of a coating element 100, a first scattered mist collecting element 200, an exhaust element 300-2, a second scattered mist collecting element 250, and an outside air conditioning element 350.

The second system differs from the first system in that the second scattered mist collecting element 250 is installed downstream of the exhaust fan 302, and the scattered mist-containing air is filtered and then released to the outside as it is.
Therefore, an external discharge branch duct system that diverges and discharges, a circulation air conditioner, and a circulation air conditioning fan become unnecessary, and the equipment cost can be reduced. On the other hand, the small diameter mist is increased by the acceleration of the scattered mist-containing air by the exhaust fan 302. Therefore, the collection efficiency of the scattered mist by the second scattered mist collecting element 250 is increased.

(Third overall system diagram)
FIG. 3 shows another embodiment of the present invention, a passing-type dry fly mist recovery system.
The coating element 100, the first scattered mist collecting element 200, the second scattered mist collecting element 250, the exhaust element 300-2, and the outside air conditioning element 350 are included.

The second system is different from the second system in that the second scattered mist collecting element 250 is installed upstream of the exhaust fan 302 and the scattered mist-containing air is filtered and then accelerated by the exhaust fan and released to the outside air.
Therefore, an external discharge branch duct system that diverges and discharges, a circulation air conditioner, and a circulation air conditioning fan are not required, and the equipment cost is reduced. On the other hand, the small mist that cannot be removed by the first scattering mist recovery element 200 remains. As a result, the exhaust fan 302 is prevented from being dirty.

FIG. 8 is another example of the first scattering mist collecting element.
Collision type gas-liquid separation means 202 and 203 are arranged independently from collision type gas-liquid separation casing 206, and exhaust air acceleration is performed without restricting the shape and internal volume of collision-type gas-liquid separation casing 206. The arrangement of the collision type gas-liquid separation means 202 and 203 with respect to the means 206 can be optimized. Of course, it is possible to make 204 independent of the collision type gas-liquid separation housing 206.

FIG. 9 is another example of the first scattered mist collecting element.
The scattered mist-containing air ejected at a high speed from the end portion of the exhaust air acceleration means 201 is guided to the collision type guide means 210 disposed in the immediate vicinity of the opening. The collision-type guide means 210 has a surface area sufficient to receive the entire air flow containing the scattered mist that is ejected from the terminal portion of the exhaust air acceleration means 201 at a high speed, and collects a large part of the scattered paint mist by collision. Meanwhile, the scattered mist-containing air flow is guided in the inclination direction of the collision-type guiding means 210.
The collision type guiding means collects some scattered paint mist by collision, but its role is to deflect the scattered mist-containing air flow, and it reflects on the scattered mist-containing air flow discharged from the discharge air acceleration means 201. In order not to cause turbulent flow or to cause turbulent flow, the air flow is set to collide with the scattered mist-containing air flow at an angle of at least 60 degrees or less.

Although not shown, in the example of FIG. 9 as well, it is possible to dispose the collision-type gas-liquid separation means 202 or 203 or 202/203 independently from the collision-type gas-liquid separation housing 206 as in FIG. Needless to say.

The scattered mist-containing air flow guided by the collision-type guiding means 210 with its thickness extended thinly collides with the first collision-type gas-liquid separation means 202 (202 part of the collision gas-liquid separation casing) as it is. The large-diameter scattered paint mist adheres to the first collision type gas-liquid separation means 202 and is collected. At this time, the scattered mist-containing air flow is increased in the thickness at the time of collision, so that the chance of contact with the first collision-type gas-liquid separation means 202 is increased, and the efficiency of collecting the scattered mist is increased.

The scattered mist-containing air including the scattered paint mist that has not adhered to the first collision-type gas-liquid separation means 202 branches right and left along the surface of the first collision-type gas-liquid separation means 202 and travels straight. It collides with the second collision type gas-liquid separation means (203 part of the collision gas-liquid separation casing). Similar to the first collision type gas-liquid separation unit 202, a part of the scattered paint mist having a particle size larger than that of air adheres to the second collision type gas-liquid separation unit 203 and is collected. The remaining scattered mist-containing air branches right and left along the surface of the second collision type gas-liquid separation means 203, and proceeds straight as it is to form the third collision type gas-liquid separation means 204 (204 of the collision gas-liquid separation housing). The scattered paint mist having a large particle size that has collided with the second part is attached to the third collision type gas-liquid separation means 204 and collected.

The scattered paint mist adhering to and collected by the collision type gas-liquid separation means 202, 203, and 204 flows under the collision type gas-liquid separation housing 206 according to gravity and collects and accumulates. In FIG. 7, a separation liquid collecting means 205 having a depression at the bottom of the collision type gas-liquid separation housing 206 is provided to collect the collected scattered paint mist, but the gist of the present application is not limited to this. The object is achieved if there is no opening in which the scattered paint mist stored in the collision-type gas-liquid separation housing 206 is scattered and stays together.

In addition, the scattered mist-containing air from which the paint mist having a large particle size has been removed by colliding with the first, second, and third collision-type gas-liquid separation means is the uppermost layer of the collision-type gas-liquid separation housing 206. In FIG. 9, the collision type gas-liquid separation casing 206 is asymmetric with the exhaust air acceleration means 201 in between, and the upper end on one side is It is set at a position lower than the end portion of the exhaust air acceleration means 201. As a result, the exhaust air acceleration means 201 and the collision type gas-liquid separation casing 206 have a degree of freedom to move in one direction (in this case, the left direction) in addition to the vertical separation direction.

The scattered mist-containing air from which the paint mist having a large particle size has been removed by colliding with the first, second and third collision-type gas-liquid separation means is provided at the uppermost position of the collision-type gas-liquid separation housing 206. The air is discharged to the outside from the scattered mist-containing air discharge opening 207 and sent to the air supply opening 208 for supplying air to the downstream side connected to the scattered mist-containing air discharge opening 207 in a sealed state.

FIG. 10 is another example of the first scattering mist collecting element.
The collision-type gas-liquid separation means 202 and 203.204 are arranged in various forms, and the separation liquid collecting means 205 is deformed and moved accordingly, and all belong to the gist of the present application.
In addition, in order to prevent the scattered mist that has been separated and stored in the separated liquid collecting means 205 from being scattered, the air includes the accelerated scattered mist or the scattered mist that is deflected by colliding with the collision type gas-liquid separating means 202 and 203.204. It is also an important component to install the separation liquid collecting means 205 at a position where the air flow does not directly hit.

FIG. 11 shows another example of the exhaust air acceleration means.
As shown in FIG. 7, it is desirable that the exhaust air accelerating means 201 is proportionally reduced in diameter, but a two-stage reduced diameter or a uniquely reduced diameter is not contrary to the gist of the present application.

  FIG. 12 is a schematic configuration diagram showing an entire system as a fourth embodiment embodying the present invention.

(Fourth overall system diagram)
FIG. 12 is a horizontal dry mist recovery system according to the present invention. As shown in FIG. 12, the horizontal dry scattering mist recovery system includes a coating element 100, a first scattering mist recovery element 200, a second scattering mist recovery element 250, and an air supply element 300.

  The configuration of the painting element 100 includes a painting equipment casing 104 that surrounds the article 101 and the painting means 102, a painting means 102 that performs painting by spraying the painting material 101 in a mist form, and a painting equipment. In the casing 104, the scattered mist-containing air that is on the opposite side (in this case, the right side) across the object 101 from the coating means 102 and has not adhered to the object 101 is moved to the outside of the coating equipment casing 104. It consists of a scattered mist-containing air exhaust space 106 that collects for discharge.

The operation of the painting element 100 will be described in detail with reference to FIG.
The coating means 102 operated by a coating worker or the like on the object 101 is sprayed toward the object 101 in the form of a mist to form a uniform thin coating on the surface of the object 101. To do.

On the other hand, the air flow generated by the suction of the exhaust fan 302 is a uniform and gentle air flow (booth airflow) toward the scattering mist-containing air exhaust space 106 and flows into the coating equipment casing 104. Of the paint sprayed toward the object to be coated in the form of a mist, the paint that has not adhered to the object to be coated 101 is mixed with the booth airflow inside the coating equipment housing 104 as the scattered mist, and the scattered mist-containing air And collected in the air exhaust space 106 containing the scattered mist.

The configuration of the first scattered mist collecting element 200 is such that guide means 107 for smoothly guiding the scattered mist-containing air collected in the scattered mist-containing air exhaust space 106 to the exhaust air accelerating means at the most downstream side of the coating element 100. And the discharge air accelerating means 201 connected to the guide means 107 and reducing the vent cross-sectional area so that the diameter reduction ratio of the upstream portion is larger than that of the downstream portion, and the discharge mist containing air mist containing air Collision-type gas-liquid separation means 202, 203, and 204 for separating large-particle size scattered mist and air by being collided with the air containing the scattered mist after acceleration, installed opposite to the air ventilation direction, and discharged A collision-type gas-liquid separation casing 206 containing the terminal portion of the air acceleration means 201, the collision-type gas-liquid separation means 202, 203, 204, and the collision-type separation liquid collecting means 205; A collision-type separation liquid collecting means 205 that collects the coating liquid separated by the collision-type gas-liquid separation means and a discharge air accelerating means 201 and a discharge air accelerating means 201 located at the lower part of the separation casing 206 and receiving the large particle size scattering mist The scattered mist-containing air discharge opening 207 for discharging the scattered mist-containing air separated from the air to the outside of the collision-type gas-liquid separation housing 206, and the scattered mist-containing air discharged from the scattered mist-containing air discharge opening 207 It comprises an air supply space 210 for receiving and delivering it to the filtration type gas-liquid separation means 251.

The operation of the first scattering mist collecting element 200 will be described in detail with reference to FIG.
The scattered mist that has not adhered to the object to be coated in the painting element 100 is mixed with the booth airflow caused by the suction of the exhaust fan 302 to become scattered mist-containing air, and gathers in the downstream scattered mist-containing air exhaust space 106.
Next, the guide means 107 and the exhaust air acceleration means 201 connected to the guide means 107 are guided so that the passage of the exhaust air acceleration means has a larger diameter reduction ratio in the upstream portion than in the downstream portion as it proceeds downstream. Since the cross-sectional area of the ventilation is reduced, the scattered mist-containing air passing therethrough gradually increases the flow velocity and is ejected at high speed from the terminal end opening of the discharge air acceleration means into the collision gas-liquid separation casing.

The scattered mist-containing air ejected at high speed collides with the first collision-type gas-liquid separation means 202 disposed in the vicinity of the opening of the discharge air acceleration means 201, and the large-size scattered paint mist is the first collision type. It adheres to the gas-liquid separation means 202 and is collected. The scattered mist-containing air including the scattered paint mist that has not adhered branches up and down along the surface of the first collision-type gas-liquid separation means 202, and proceeds straight as it is to the second collision-type gas-liquid separation means (collision). It collides with 203 parts of the gas-liquid separation casing.
Similar to the first collision type gas-liquid separation means 202, a part of the scattered paint mist having a particle size larger than that of air adheres to and is collected by the second collision type gas-liquid separation means 203, and contains the remaining scattered mist. The air branches right and left along the surface of the second collision-type gas-liquid separation means 203, travels straight as it is, and collides with the third collision-type gas-liquid separation means 204 (204 part of the collision-gas-liquid separation housing). The remaining scattered paint mist having a large particle size adheres to the third collision type gas-liquid separation means 204 and is collected.

The scattered paint mist adhering to and collected by the collision type gas-liquid separation means 202, 203, and 204 flows under the collision gas-liquid separation housing 206 due to gravity and collects and accumulates.
In FIG. 12, the collision gas-liquid separation housing 206 is flat, but a recess may be formed on the bottom. There is no opening where the scattered paint mist collected in the collision gas-liquid separation casing 206 other than the scattering mist-containing air discharge opening 207 is scattered, and the scattering paint collected inside the collision gas-liquid separation casing 206. If it is the structure which hold | maintains mist, the objective will be achieved as the separation liquid gathering means 205.

The scattered mist-containing air from which the paint mist having a large particle size has been removed by colliding with the first, second, and third collision-type gas-liquid separation means is separated from the scattered mist-containing air discharge opening 207 by collision-type gas-liquid separation. A filtration type that is discharged to the outside of the housing 206 and guided along the opposite surface of the surface used when the air discharge space containing the scattered mist is formed by the guide means 107 or when the discharge air acceleration means 201 accelerates the discharge air. It is sent to an air supply space 210 surrounded by a first scattering mist collection housing 209 for delivery to the gas-liquid separation means 251.

In the first scattered mist collecting element 200, the scattered mist-containing air suction portion of the discharge air accelerating means 201 is on the opposite side of the position of the object to be coated 101 with respect to the coating means 102, and the height is about the same as that of the object to be coated. Or lower position. The guide means 107 is extended from the lower half of the scattered mist-containing air suction portion of the exhaust air accelerating means to the lower region of the object position, and from the upper half of the scattered mist-containing air suction portion, the upper portion of the object position. The guide means 107 is extended over the area.

The second scattering mist collecting element 250 allows the scattering mist having a relatively small particle size to adhere to the filtration type gas-liquid separation means 251 by passing the scattering mist-containing air sent from the air feeding space 210 and the scattering mist. Separating air, discharging air with greatly reduced scattered mist content to the downstream, renewable and multi-layer filtration type gas-liquid separation means 251 and 252 and the scattered mist-containing air from other than the filtration surface The filtration type gas-liquid separation means frames 254 and 255 are formed so as not to vent the downstream side.

The air supply element 300 is configured to send air, in which the content of the scattered mist is greatly reduced, to the exhaust fan on the downstream side of the second scattered mist collecting element 250 and to release it to the outside air via the air supply duct 301.

FIG. 13: is a schematic block diagram which shows the whole system as 5th embodiment which actualized this invention.
As shown in FIG. 13, the horizontal dry scattering mist recovery system includes a coating element 100, a first scattering mist recovery element 200, a second scattering mist recovery element 250, and an air supply element 300.

FIG. 13 shows the configuration of the first scattering mist collecting element 200 in the fourth embodiment of FIG. 12 in which the exhaust air accelerating means is arranged in the vertical direction. The scattered mist collecting element 200 will be described below.

The structure of the 1st scattering mist collection | recovery element 200 is as follows.
The guide means 107 extends from the position higher than the object to be coated on the opposite side of the object 101 from the position higher than the object to be painted to the lower area of the object position. Enclosed air mist containing air exhaust space 106 is set. The scattered mist-containing air intake portion of the exhaust air accelerating means opens below the scattered mist-containing air exhaust space 106, from which the exhaust air accelerating means 201 is installed vertically.

The operation of the first scattering mist collecting element 200 is as follows.
The scattered mist that has not adhered to the object to be coated in the painting element 100 is mixed with the booth airflow caused by the suction of the exhaust fan 302 to become the scattered mist-containing air, and the scattered mist-containing air surrounded by the guide means 107 on the downstream side. Collect in the exhaust space 106.

Next, the guide means 107 and the vertical exhaust air acceleration means 201 connected to the guide means 107 are guided, and the passage of the exhaust air acceleration means 201 becomes larger in the diameter reduction ratio of the upstream portion than the downstream portion as it proceeds downward. Therefore, the scattered mist-containing air passing therethrough gradually increases the flow velocity and is ejected from the terminal end opening of the discharge air acceleration means 201 into the collision gas-liquid separation casing 206 at high speed.

The scattered mist-containing air ejected at high speed collides with the first collision-type gas-liquid separation means 202 disposed in the vicinity of the opening of the discharge air acceleration means 201, and the large-size scattered paint mist is the first collision type. It adheres to the gas-liquid separation means 202 and is collected.
The scattered mist-containing air including the scattered paint mist that has not adhered branches to the left and right along the surface of the first collision type gas-liquid separation means 202 and travels straight as it is to the second collision type gas-liquid separation means (collision). It collides with 203 parts of the gas-liquid separation casing.
Similar to the first collision type gas-liquid separation means 202, a part of the scattered paint mist having a particle size larger than that of air adheres to and is collected by the second collision type gas-liquid separation means 203, and contains the remaining scattered mist. The air branches right and left along the surface of the second collision-type gas-liquid separation means 203, travels straight as it is, and collides with the third collision-type gas-liquid separation means 204 (204 part of the collision gas-liquid separation casing). The remaining scattered paint mist having a large particle size adheres to the third collision type gas-liquid separation means 204 and is collected.

The scattered mist-containing air from which the paint mist having a large particle size has been removed by colliding with the first, second, and third collision-type gas-liquid separation means is separated from the scattered mist-containing air discharge opening 207 by collision-type gas-liquid separation. It is discharged to the outside of the housing 206, guided by the back surface of the guide means 107, and sent to the air supply space 210 surrounded by the first scattering mist collection housing 209 for delivery to the filtration type gas-liquid separation means 251. .

Schematic configuration diagram showing an entire system as a first embodiment embodying the present invention The schematic block diagram which shows the whole system as 2nd embodiment which actualized this invention The schematic block diagram which shows the whole system as 3rd embodiment which actualized this invention Example of second scattering mist recovery element 4 is a perspective view. Perspective view of filtration type gas-liquid separation means Example of the main part of the present invention, the first scattering mist collecting element Other embodiments of the main part of the present invention, the first scattering mist collecting element Other embodiments of the main part of the present invention, the first scattering mist collecting element Other embodiments of the main part of the present invention, the first scattering mist collecting element Other embodiments of the essential part of the present invention, exhaust air acceleration means The schematic block diagram which shows the whole system as 4th embodiment which actualized this invention The schematic block diagram which shows the whole system as 5th embodiment which actualized this invention Example of conventional wet-spray mist recovery system Example of conventional wet-spray mist recovery system Example of a conventional dry-type scattered mist collection system Example of a conventional dry-type scattered mist collection system Example of a conventional dry-type scattered mist collection system Example of a conventional dry-type scattered mist collection system Example of conventional wet-spray mist recovery system Example of conventional wet-spray mist recovery system Graph showing the relationship between wind speed, pressure loss, and dust collection efficiency

DESCRIPTION OF SYMBOLS 100 ... Paint element 101 ... To-be-coated object 102 ... Coating means 104 ... Coating equipment housing 106 ... Spattering mist containing air exhaust space 200 ... First scattering mist collection element 201 ... Exhaust air acceleration means 202, 203, 204 ... Collision type Gas-liquid separation means 205 ... Separation liquid gathering means 206 ... Collision-type gas-liquid separation housing 207 ... Spattering mist discharge opening 210 ... Collision-type guiding means 250 ... Second scattering mist collection element 251 252 253 ... Filtration-type gas-liquid Separation means 257 ... Filtration type gas-liquid separation casing 300 ... Circulation air conditioning element 301 ... Air supply duct 302 ... Air supply fan 304 ... External discharge adjustment valve 305 ... Circulation air conditioner 306 ... Air supply chamber 350 ... Outside air conditioning element 352 ... Outside air Air conditioner 353 ... Outside air conditioning fan

Claims (8)

Coating means for spraying paint in a mist state while flowing air-conditioned air in a certain direction, and painting means, the object to be coated, and the object to be coated out of the paint sprayed from the coating means The coating equipment housing that surrounds the air containing the scattered mist that did not adhere to the air, the air exhaust space containing the scattered mist that collects the air containing the scattered mist to the outside of the coating equipment housing, and the scattering mist It is connected to the contained air exhaust space, and it is greatly increased by colliding with the expelled mist-containing air that has increased the discharge speed, and the discharged air accelerating means that straightens while increasing the discharge speed of the scattered mist-containing air and straightens the scattered mist-containing air. Includes collision type gas-liquid separation means for attaching particle size scattering mist and separating mist and air, collision type gas-liquid separation means, separation liquid collecting means, and exhaust air acceleration means. Separation liquid collecting means for collecting the coating liquid separated by the collision-type gas-liquid separation means and disposed under the collision-type gas-liquid separation means inside the collision-type gas-liquid separation case and the collision-type gas-liquid separation case In a coating system having a filtration type gas-liquid separation means for separating the small particle size scattered mist and air by filtering the scattered mist-containing air discharged downstream of the scattered mist-containing air discharge opening, Inside the liquid separation housing, the separation liquid collecting means is arranged at the bottom, the collision type gas-liquid separation means is arranged at the middle, and the scattered mist-containing air discharge opening is arranged at the top, and the discharge air acceleration means is the scattering mist-containing air discharge opening. The exhaust air accelerating means is preferably installed so as to have a collision-type gas-liquid separation from an upstream part located outside the collision-type gas-liquid separation housing so that the downstream diameter reduction ratio is smaller than that of the upstream part. Located inside the enclosure The first collision-type gas-liquid separation means with respect to the end portion airflow direction of the discharge air accelerating means is gradually reduced in diameter so that the downstream diameter reduction ratio becomes smaller than that of the upstream portion until the flow portion. The collision plate surface of the second collision type gas-liquid separation means is arranged in a straight line on the extension of the collision plate surface of the first collision type gas-liquid separation means. Features. Coating means for spraying paint in a mist state while flowing air-conditioned air in a certain direction, and painting means, the object to be coated, and the object to be coated out of the paint sprayed from the coating means The coating equipment housing that surrounds the air containing the scattered mist that did not adhere to the air, the air exhaust space containing the scattered mist that collects the air containing the scattered mist to the outside of the coating equipment housing, and the scattering mist The exhaust air accelerating means connected to the exhaust air containing space and straightening while increasing the discharge speed of the scattered mist-containing air to rectify the scattered mist-containing air, and the scattered mist-containing air whose discharge speed has been increased by the exhaust air acceleration means Collision-type gas-liquid separation that separates mist and air by colliding with the collision-type guiding means, and by adhering the large-particle-size scattering mist by colliding with the scattering mist-containing air whose discharge speed is increased A separation liquid collecting means arranged inside the collision type gas-liquid separation housing and below the collision-type gas-liquid separation means to collect the coating liquid separated by the collision-type gas-liquid separation means; and the collision-type guide Small particle size scattering by filtering the collision-type gas-liquid separation housing containing the means, the collision-type gas-liquid separation means and the separation-liquid collecting means, and the scattered mist-containing air discharged downstream of the scattering mist-containing air discharge opening In a coating system having a filtration-type gas-liquid separation means for separating mist and air, the collision-type gas-liquid separation means and the separation liquid collecting means are included and are movable in a direction perpendicular to the ventilation direction with respect to the discharge air acceleration means. Inside the collision type gas-liquid separation housing, the separation liquid collecting means is arranged at the bottom, the collision type gas-liquid guide means at the middle, and the air discharge opening containing scattered mist at the top. The exhaust air acceleration means is So that the diameter reduction ratio of the part is smaller than that of the upstream part, and preferably the diameter reduction ratio from the upstream part to the downstream part located outside the collision-type gas-liquid separation housing is gradually reduced so as to be smaller than that of the upstream part. The airflow discharged from the terminal portion of the air acceleration means is collided by the collision-type guiding means having a reduced cross-sectional area and being inclined to be approximately 60 degrees or less with respect to the flow direction in the vicinity of the discharge air accelerating means. It is deflected in a direction along the surface of the gas and collides with the first collision type gas-liquid separation means. A coating means for spraying paint in a mist state while flowing outside air or air-conditioned air in a certain direction, and the coating means, the coating object, and the paint sprayed from the coating means A coating equipment housing that surrounds the scattered mist-containing air that has not adhered to the object to be coated, and a scattered mist-containing air exhaust space that collects the scattered mist-containing air to the outside of the coating equipment housing The exhaust air accelerating means connected to the air exhaust space containing the scattered mist and straightened while increasing the discharge speed of the scattered mist containing air, and colliding with the air containing the scattered mist increased in discharge speed Thus, the collision type gas-liquid separation means for attaching the large particle size scattered mist and separating the mist and air, the collision type gas-liquid separation means, the separation liquid collecting means, and the exhaust air acceleration means are terminated. Collision type gas-liquid separation housing enclosing the part and the inside of the collision type gas-liquid separation housing are arranged below the collision-type gas-liquid separation means and collect the coating liquid separated by the collision-type gas-liquid separation means In a coating system having a separation liquid collecting means and a filtration type gas-liquid separation means for separating the small particle size scattered mist and air by filtering the scattered mist-containing air discharged downstream of the scattered mist-containing air discharge opening In the collision type gas-liquid separation casing, the separation liquid collecting means is arranged at the lowest position, the first collision type gas-liquid separation means and the air discharge opening containing the scattering mist are arranged in the middle, and the discharge air accelerating means is the scattering mist. The exhaust air accelerating means, which is installed horizontally through the contained air discharge opening, is preferably located upstream of the collision type gas-liquid separation housing so that the downstream diameter reduction ratio is smaller than that of the upstream part. Collision type gas-liquid separation from To the downstream part located inside the body, the ventilation cross-sectional area is gradually reduced so that the downstream diameter reduction ratio is smaller than the upstream part, and the object to be coated, the air exhaust space containing scattered mist, and the exhaust air acceleration means It is characterized in that it is installed on a horizontal line, or an object to be coated and an air exhaust space containing scattered mist are installed on a horizontal line. A coating means for spraying paint in a mist state while flowing outside air or air-conditioned air in a certain direction, and the coating means, the coating object, and the paint sprayed from the coating means A coating equipment housing that surrounds the scattered mist-containing air that has not adhered to the object to be coated, and a scattered mist-containing air exhaust space that collects the scattered mist-containing air to the outside of the coating equipment housing The exhaust air accelerating means connected to the air exhaust space containing the scattered mist and straightened while increasing the discharge speed of the scattered mist containing air, and colliding with the air containing the scattered mist increased in discharge speed Thus, the collision type gas-liquid separation means for attaching the large particle size scattered mist and separating the mist and air, the collision type gas-liquid separation means, the separation liquid collecting means, and the exhaust air acceleration means are terminated. Collision type gas-liquid separation housing enclosing the part and the inside of the collision type gas-liquid separation housing are arranged below the collision-type gas-liquid separation means and collect the coating liquid separated by the collision-type gas-liquid separation means In a coating system having a separation liquid collecting means and a filtration type gas-liquid separation means for separating the small particle size scattered mist and air by filtering the scattered mist-containing air discharged downstream of the scattered mist-containing air discharge opening In the collision type gas-liquid separation housing, the separation liquid collecting means is arranged at the bottom, the collision type gas-liquid separation means is arranged at the middle, and the air discharge opening containing the scattering mist is arranged at the top, and the discharge air acceleration means is a scattering mist. The exhaust air accelerating means is installed vertically through the contained air exhaust opening, and the exhaust air accelerating means preferably has an upstream portion located outside the collision-type gas-liquid separation casing so that the diameter reduction ratio of the downstream portion is smaller than that of the upstream portion. To collision-type gas-liquid To the downstream part located inside the housing, gradually reduce the ventilation cross-sectional area so that the downstream diameter reduction ratio is smaller than that of the upstream part, and the object and the air exhaust space containing the scattered mist are on a horizontal straight line. The exhaust air accelerating means is installed vertically or obliquely below the air mist-containing air exhaust space. A guide means for forming an air exhaust space containing scattered mist, an exhaust air acceleration means arranged substantially horizontally or vertically, a filtration type gas-liquid separation means arranged downstream of the collision type gas-liquid separation means, and a collision type gas The surface of the guide means that has a scattering mist-containing air discharge opening for discharging the scattered mist-containing air that has collided with the liquid separation means to the outside of the collision-type gas-liquid separation housing, or discharges the surface of the guide means that forms the scattering mist-containing air exhaust space. Contain scattering mist discharged from the inside of the collision type gas-liquid separation housing to the filtration type gas-liquid separation means through the air discharge opening containing the scattering mist along the surface opposite to the surface of the discharge air acceleration means used at the time of air acceleration 5. The coating system according to claim 1, wherein the air is smoothly deflected and guided toward the filtration type gas-liquid separation means side. In the traveling direction of the scattered mist-containing air, the exhaust air accelerating means reduces the diameter so that the diameter reduction ratio of the upstream portion is larger than the downstream portion, and the length of the traveling direction is the short diameter of the discharge portion. As described above, the distance of the first collision type gas-liquid separation means that is preferably at least twice the short diameter and directly faces the tip of the discharge part is in the range of 5 to 40 cm, preferably in the range of 5 to 15 cm, and the wind speed is 10 to 15 m / The coating system according to claim 1, wherein the coating system is s. Of the collision-type gas-liquid separation means disposed in the collision-type gas-liquid separation casing, the first collision-type gas-liquid separation means and the second collision-type gas-liquid separation means, or the first collision-type gas The coating system according to claim 1, wherein the liquid separating means is disposed in a position facing away from the wall surface in the collision type gas-liquid separation casing so as to face the colliding scattered mist-containing air flow. The coating liquid separated from the scattered mist at a position where the scattered mist-containing air discharged by increasing the discharge speed from the discharged air acceleration means or the scattered mist-containing air flow deflected by the collision-type gas-liquid separating means does not collide. The coating system according to claim 1, further comprising a separating liquid collecting means for collecting the liquid.

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