JP2002166113A - Dust collection filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute filter constituting parts of the same material so as to facilitate fractional recovery while ensuring the expected function of a dust collection filter. SOLUTION: In the dust collection filter equipped with a filter element 20 formed by folding a cloth-like filter medium in a zigzag state, a shape retaining peripheral frame body 21 housing the filter element 20 and the spaces 26 interpossed between the mutually opposed filtering surfaces of the filter element 20 held to the folded state, the filter element 20 is constituted of a synthetic resin material and the peripheral frame body 21 surrounding the outer periphery of the filter element 20 and the spacers 26 are constituted of the synthetic resin material of the same kind, and the filter element 20 and the peripheral frame body 21 are integrally bonded by an adhesive 3 made of the synthetic resin material of the same kind.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for producing gas or steam, such as oil mist, oil fumes, welding fumes, etc. generated around various working equipment, such as fine dust and mist generated in a factory or welding fumes generated in a welding booth. And a dust that is in a gas phase as a whole (hereinafter referred to as a “gas phase fluid”), including any fine mixture, to remove dust from the gas phase fluid. The present invention relates to an improvement of a dust collecting filter used in a dust collector for cleaning.

[0002]

2. Description of the Related Art As a dust collecting filter used in a dust collector for treating a gas-phase fluid of this kind, a filter having a structure shown in FIG. 7 is conventionally known. In this structure, a filter element 020, which is used as a final filter that performs a dust removal process at the final stage of a dust collector in a favorable manner, is formed by folding a cloth-like filter material made of a synthetic resin material such as polypropylene into a zigzag shape. The filter element 020 is provided inside a rectangular frame body 211, which is made of wood and is rectangular, and is folded and stacked.
Between the filter surfaces facing each other, a corrugated spacer 026 formed by processing an aluminum foil into a waveform is interposed, and is configured to allow the processing fluid to pass in the direction of the arrow shown in FIG. .

[0003]

Such a filter for dust collection has an excellent function as a final filter for performing a good treatment at the final stage of the dust collector. However, as a material constituting the unit, in addition to a filter medium made of an epoxy resin material, a peripheral frame body made of veneer plywood, a pull-out handle made of a vinyl string attached to the peripheral frame body, and a handle provided on the peripheral frame body Since various materials such as a fastener having a metal part for fixing, an adhesive between the filter medium and the peripheral frame, and a spacer made of aluminum foil are used, there are the following problems. In other words, when disposing of this dust collection filter, it is necessary to disassemble each component part finely and separate it into materials in order to separate and collect waste, which is required in recent years. It takes a lot of trouble.

[0004] It is an object of the present invention to provide a dust collection filter of the same type so as to facilitate its separation and collection at the time of disposal while securing the expected function of the dust collection filter. For that purpose. Still another object of the present invention is to rationally obtain a configuration for obtaining a required strength of a component while suppressing costs by devising a process in a manufacturing process when the dust collection filter is formed of the same type.

[0005]

Means for Solving the Problems A dust collecting filter according to the present invention adopted to achieve the above object has the following configuration. [Invention according to claim 1] In the invention according to claim 1,
A filter element formed by folding a cloth-shaped filter medium into a zigzag state, a shape-retaining peripheral frame body containing the filter element, and a filter element interposed between the filter elements in the folded state. In the dust collecting filter provided with a spacer, the synthetic resin material constituting the filter element and the peripheral frame surrounding the outer periphery of the filter element and the spacer are formed of the same kind of synthetic resin material. In addition, the structure of the filter element is characterized in that the filter element and the peripheral frame are bonded and integrated with a synthetic resin material-based adhesive of the same type.

By adopting this configuration, a filter element formed by folding a cloth-like filter material in a zigzag manner and forming a laminated state, a shape retaining peripheral frame body containing the filter element, and the filter material opposing each other. Since the spacers interposed between the filtration surfaces are made of the same kind of synthetic resin material, it is not necessary to disassemble and separate and collect them, and it is possible to reduce the number of steps for separating and collecting.
In addition, as means for integrating the filter element and the peripheral frame body, means for bonding with a synthetic resin material-based adhesive of the same type as those described above is employed, so that the used adhesive is also included. Advanced sorting is possible. Moreover,
When the adhesive used for bonding the filter element and the peripheral frame is solidified, the adhesive functions as a reinforcing material for the peripheral frame.

[0007] According to the second aspect of the present invention, the peripheral frame is constituted by a combination of frame members facing each other on the outer periphery of the filter medium, and the frame constituting the peripheral frame is formed. As the side member, a member formed by bonding adjacent frame side members using the same type of synthetic resin material-based adhesive as the synthetic resin material constituting the filter medium may be used.

According to a second aspect of the present invention, when the peripheral frame is constituted by a combination of frame side members facing each other on the outer periphery of the filter medium,
It is possible to obtain a structure in which the filter element and the frame side member can be easily bonded and assembled. Also, since the frame side members are also bonded with the same type of synthetic resin material-based adhesive, compared to a case where only the peripheral frame body and the filter element are bonded with the same type of synthetic resin material-based adhesive. Thus, the reinforcing effect by solidification of the adhesive can be further increased.

[Invention according to claim 3] As described in claim 3, the spacer may be constituted by a porous body having a large number of small-diameter air holes formed therein.

When the spacer is constituted by a porous body having a large number of small-diameter vents, the thickness of the spacer itself can be used as an air passage for the gas-phase fluid. For this reason, the dimension in the thickness direction including the corrugated bending allowance of the spacer can be reduced as compared with the case where the non-porous spacer is used. Therefore, even if the spacer in the thickness direction is reduced to improve the integration density of the filter element, or if the spacer is made thicker than when the spacer is formed by a non-porous corrugated plate, the required ventilation passage is required. The area can be secured.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. [Application environment of the present invention] The dust collection filter of the present invention can be used for gas or steam such as fine dust and mist generated in factories, oil mist and oil smoke generated around various work equipment, and welding fume generated in welding booths. Gas phase fluid containing a fine mixture of dust and impurities (hereinafter simply referred to as dust) is used for various dust collectors, and the gas phase fluid to be processed is passed through a filter medium. This is a filtration type filter that collects dust.

One example in which the dust collecting filter of the present invention is applied to a dust collector will be described with reference to a conceptual diagram shown in FIG. As shown in FIG. 1, a blast for generating a gas flow of a gaseous phase fluid therein so that a gaseous phase fluid is sucked into a casing 1 of the dust collector through an inlet 10 and discharged from an outlet 16. Means 15 are provided, and a processing path for removing dust during the passage of the gas phase fluid is provided.

In this processing path, a pre-processing chamber 11 closest to the suction port 10 is provided with a buffer 12 for removing relatively coarse dust, oil and the like from the dust contained in the sucked gas phase fluid. Have been. This baffle 12
There are various types. For example, a collision plate that intersects the flow direction of the gas phase fluid is provided, and dust or oil is removed by colliding the gas phase fluid with the collision plate, or the flow direction of the gas phase fluid is changed vertically or horizontally. A guide surface to be changed is provided to remove dust from the airflow, or a relatively coarse filter medium, for example, a coarse filter medium made of metal fiber, glass wool, non-woven fabric, etc. is provided, and is contacted with or passed through the filter medium. Any of them may be selected or used in combination according to the type of gas-phase fluid to be treated and the demand for processing accuracy.

The gas-phase fluid processed in the pre-processing chamber 11 is then introduced into the filter processing chamber 13 at an intermediate position, where it is subjected to the dust removing action again. Here, a large number of dust collection filters 2 are provided, and the fine dust in the gas phase fluid is captured by the dust collection filter 2 by sequentially passing the gas phase fluid through each dust collection filter 2. , A highly accurate dust removal process is performed. The gas-phase fluid processed by the filter processing unit 13 is introduced into the rearmost exhaust chamber 14 provided with the blast means 15 so as to forcibly exhaust the gas-phase fluid to be processed. The dust chamber 14 is configured so that the gaseous phase fluid to be treated is sucked by the blowing means 15 from the previous process and discharged from the outlet 16 to the outside of the casing 1.

[Structure of Dust Collection Filter] The dust collection filter 2 of the present invention comprises a filter processing chamber 13 of the dust collector.
In the flow direction of the gas-phase fluid to be treated, a plurality of filters are arranged and used at predetermined intervals, and each dust-collecting filter 2 is configured as follows. Figure 2
As shown in FIG. 5, each of the dust collecting filters 2 is made of a filter element 20 formed by folding a cloth-like filter medium made of polypropylene in a squaring manner, and a polypropylene filter provided so as to surround the outer periphery of the filter element 20. Of the filter element 20 in a folded state, and a spacer 26 made of polypropylene interposed between the opposite filtering surfaces of the filter element 20 in the folded state.

The filter element 20 is a so-called HEPA filter, a cloth-like material made of extremely fine fibers having a diameter of about 1 micron. The filter surface is folded in a zigzag manner in the flow direction of the gas to be treated. It is arranged in a multi-layered state along the line, and by passing the gas-phase fluid to be processed, oil mist, dust, and welding fumes remaining in the gas-phase fluid are almost completely removed. It is provided so that it can be removed.

As shown in FIG. 2, the peripheral frame body 21 is provided on four frame side members 22, 23, 24, 25 and a part of the frame side members 22, 23, 24, 25. Handle 27
And a combination of These frame members 22,
The first frame side member 22 and the third frame side member 24 located at the start end side end and the end end side of the zigzag of the cloth which is the filter element 20 among 23, 24, 25, respectively.
However, the finished dimensions are set so as to form the frame side members 22 and 24 having substantially the same area as one filtering surface formed by the zigzag folding.
2nd frame side member 2 provided around the direction orthogonal to 24
The third and fourth frame side members 25 are slightly longer than the first frame side member 22 and the third frame side member 24, and are dimensioned to have a length ranging from the start of the self-folding to the end thereof. I have.

Each frame member 22, 23, 24, 2
5 is configured as shown in FIG. Since these are all the same in shape, here, the first frame member 22 will be described as an example. That is, the first frame side member 22 cuts a near the four corners of one sheet having a certain shape-retaining property, and cuts the peripheral portions 22a and 22b outside the dotted lines in the figure. The area enclosed by the dotted line is folded inward from the dotted line in the figure, and the area surrounded by the dotted line is defined as the bottom surface portion 22c, and the folded portion at the end of the long peripheral portion 22a is hatched. It is formed in a box shape with a shallow bottom as shown in FIG. 2 by adhering to the folded portion at the end of the short peripheral portion 22b of the adjacent portion. Similarly, the other frame side members 23, 24, and 25 are formed in a box shape, respectively, and are combined to form a peripheral frame body 21 that surrounds the outer periphery of the filter element 20. Of the frame side members of the peripheral frame body 21, the third frame side member 24
A handle 27 shown in FIG. 5 made of the same material as that of the peripheral frame body 21 is adhered to the outer peripheral portion by applying the adhesive 3 to the attaching surface 27a. In the filter element 20, both ends in the longitudinal direction of the cloth-like filter medium are joined to the first frame side member 22 and the third frame side member 24 of the frame side members 22, 23, 24, 25, respectively. Are joined to the second frame side member 23 and the fourth frame side member 25 in a folded state.

In constituting the above-mentioned peripheral frame body 21 and the filter element integrally therewith, the present invention is as follows. That is, the first frame side member 22 and the third frame side member 24 among the frame side members 22, 23, 24, 25 formed in a box shape with a shallow bottom are attached to both ends of the filter element 20. An adhesive 3 made of an epoxy resin material that can be separated as the same kind of synthetic resin material as the frame members 22 and 24 and the filter element 20.
(See FIGS. 6A and 6B). Then, after that, either the second frame side member 23 or the fourth frame side member 25 is placed in a horizontal place, and is spread from the epoxy resin-based material in a state of spreading in a liquid state over the entire inner bottom of the box-shaped portion. A filter element 20 having a first frame side member 22 and a third frame side member 24 adhered to both ends of the adhesive 3 at a location where the liquid 3 is applied and before the adhesive 3 is solidified. Is placed, and bonded in a state where the joint is immersed in the liquid adhesive 3 (see FIGS. 6B and 6D). After the above-mentioned adhesive 3 is completely solidified or solidified to the extent that it does not easily come off, in the same manner as described above,
The other one of the second frame side member 23 and the fourth frame side member 25 is placed at a horizontal location, and the liquid adhesive 3 is supplied and applied so as to spread all over, and the first location is applied to the applied location. The frame side member 22 and the third frame side member 24 are bonded by placing the opposite side of the filter element 20 having both ends bonded to each other, and the filter element 20 and the peripheral frame 21 are integrated (FIG. 6).
(See (c) and (d).)

A spacer 26 is interposed between the filter element 20 and the peripheral frame 21 configured as described above, which are located between the filtration surfaces of the filter element 20. . The spacer 26 is formed of a porous body, that is, a plate-like body having a mesh portion coarser than the filter element 20. The spacer 26 is bent between the left and right filtration surfaces by bending the plate surface into a corrugated shape. For forming a ventilation gap.

The dust collection filter 2 constructed as described above
In this case, as shown in FIG. 3, the gas-phase fluid to be treated passes through the filter element 20, as indicated by the arrow in the figure, where dust in the gas-phase fluid is captured.
At this time, the spacer 26 located between the filtration surfaces of the filter element 20 is a porous body that allows the passage of the gaseous fluid, and does not itself prevent the passage of the gaseous fluid. Irrespective of the presence of, the distance between the opposing filtration surfaces can be maintained substantially wide. In other words, if the spacer 26 is made of aluminum foil as in the prior art, the space between the opposite filtering surfaces is divided into two by the spacer, and the flow of the gas-phase fluid flows between the aluminum foil spacer and the filtering surface. Must pass through the gap formed between them as a passage. In the present invention, regardless of the presence of the spacer 26,
While the gas-phase fluid introduced on both sides of the spacer 26 moves freely to each side beyond the location where the spacer 26 exists,
It is configured to be able to pass through the filter element 20. Therefore, the spacer 26 can also be used as a part of the passage of the gaseous fluid, so that even if the spacer 26 is made of a synthetic resin plate material that tends to be thicker than aluminum foil, A required flow passage area can be ensured without increasing the filtration surface interval of the element 20. Thus, the spacer 26 made of a synthetic resin having a relatively large thickness can be formed without reducing the integration ratio and the flow path area of the filter element 20.
Can be adopted.

[Other Embodiments] [1] In the above embodiment, the liquid adhesive 3 is used to spread the adhesive 3 so as to spread over the entire bottom surface of the frame side member. The frame side member 23 and the fourth frame side member 25 may be attached to the first frame side member 22 and the third frame side member 24, or the adhesive 3 may be applied to the entire surface and solidified. [2] The dust collection filter 2 of the present invention is mainly used near the end of the dust removal step as described in the embodiment, but may be used in an apparatus that uses this filter alone. . In addition, as a pre-process before the process using the dust collection filter 2 of the present invention, a fire type removing process for removing sparks contained in the gas-phase fluid, and a gas-liquid for capturing moisture by attaching moisture to dust in the gas-phase fluid. Equipment that employs a contact process, etc.
Alternatively, it may be used in an apparatus that employs a deodorizing treatment step using activated carbon or the like as a subsequent step. [3] The dust-collecting filter 2 of the present invention is not limited to a filter configured by employing the polypropylene filter element 20, the shape-retaining peripheral frame 21, and the spacer 26 as described in the above embodiment. Instead, a suitable material suitable for a filter can be selected. The filter element 20, the peripheral frame 21, the spacer 26, and the adhesive 3 that constitute the dust collection filter 2 do not need to be entirely made of the same material. What is necessary is just what is comprised by the material classified as a thing.

[0023]

According to the first aspect of the present invention, a dust collection filter including a filter element in which a cloth-like filter medium is folded in a zigzag shape, a shape retaining peripheral frame, and a spacer is the same type. Therefore, there is no need to disassemble and separate and collect them, and there is an advantage that the number of steps for separating and collecting can be reduced. In addition, as means for integrating the filter element and the peripheral frame body, means for bonding with a synthetic resin material-based adhesive of the same type as those described above is employed, so that the used adhesive is also included. Advanced sorting is possible. In addition, since the adhesive used for bonding the filter element and the peripheral frame is solidified, it functions as a reinforcing material for the peripheral frame, so that the constituent materials of the peripheral frame are required to have the required strength from the beginning. Therefore, there is an advantage that it is not necessary to configure a member having the above, and it is possible to reduce the use material.

According to a second aspect of the present invention, by forming the peripheral frame body by a combination of frame side members facing each other on each outer periphery of the filter medium, the filter element and the frame side member are bonded and assembled. An easy-to-use structure can be obtained, and the frame side members are adhered to each other with the same type of synthetic resin material adhesive. Therefore, only the adhesion between the peripheral frame and the filter element is made of the same type of synthetic resin material. As compared with the case of using an adhesive, there is an advantage that the reinforcing effect by solidification of the adhesive can be further increased.

According to the third aspect of the present invention, the spacer is constituted by a porous body having a large number of small-diameter vent holes, so that the thickness of the spacer itself is also used as an air passage for the gas-phase fluid, and the corrugated plate is formed. The dimension in the thickness direction between the peak and the valley of the waveform of the spacer can be reduced as compared with the case where a non-porous spacer is used. Therefore, by reducing the thickness dimension of the spacer to improve the integration density of the filter elements, or even by increasing the thickness of the spacer as compared with the case where the spacer is formed by a non-porous corrugated plate, the required ventilation flow is required. There is an advantage that a road area can be secured.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing an entire dust collector.

FIGS. 2A and 2B show the entire dust collecting filter, wherein FIG. 2A is a perspective view in an exploded state, and FIG. 2B is a perspective view in an assembled state.

FIG. 3 is a partial cross-sectional view of the dust collecting filter.

FIG. 4 is a development view showing a frame side portion of the peripheral frame body.

FIG. 5 is a developed view showing a handle portion.

FIG. 6 is an exploded perspective view and a sectional view showing a process of manufacturing the dust collecting filter.

FIG. 7 is an exploded perspective view showing a conventional dust collecting filter.

FIG. 8 is a cross-sectional view showing a conventional dust collecting filter portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Dust collection filter 3 Adhesive 20 Filter element 21 Perimeter frame 26 Spacer

Claims (3)

[Claims] 1. A filter element formed by folding a cloth-like filter material into a zigzag state, a peripheral frame for retaining the filter element therein, and a filter surface opposed to the filter element in the folded state. A dust collecting filter including a spacer interposed therebetween, wherein the synthetic resin material constituting the filter element, the peripheral frame surrounding the outer periphery of the filter element, and the spacer are of the same type. And a filter for dust collection, wherein the filter element and the peripheral frame are adhered and integrated with an adhesive of the same type of synthetic resin material as the above. 2. A frame member is constituted by a combination of frame members facing each other on each side of the outer periphery of a filter medium, and the frame members constituting the peripheral frame member are formed by combining frame member members on adjacent sides with each other. 2. The dust collecting filter according to claim 1, wherein the filter is formed by bonding using a synthetic resin material-based adhesive of the same kind as the synthetic resin material constituting the above. 3. The dust-collecting filter according to claim 1, wherein the spacer is formed of a porous body having a large number of small-diameter air holes.