CN101279166A - Sewage Filtration Device - Google Patents

Abstract

The present invention relates to a sewage filtering device comprising a cylindrical member (17) for purifying sewage flowing from the outside to the inside, and a spray pipe (21) for spraying cleaning water to the outer peripheral surface of the cylindrical member. In the first stage, the outer peripheral surface of the cylindrical part is cleaned, so that most of the solid matter falls off. In the second stage, compressed air is supplied into the cylindrical part, and fine solid matter embedded in the filter is removed by backwashing.

Description

Sewage Filtration Device

technical field

The invention relates to a filtering technology for sewage mixed with solid components.

Background technique

In order to utilize water resources, filtration device is an important tool. This is because the sewage can be turned into clean water by means of a filtration device. The main part of the filter device is the part that removes the dirt containing solids from the sewage. An amount of solids builds up on the part proportional to the time used for filtration. When this accumulation increases, flow resistance increases and the amount of water that can be treated decreases. Restoring the amount of water that can be treated requires replacement of parts with new ones or re-use of parts.

In consideration of utilization of earth's resources, it is desirable to be able to reuse parts without replacing them. A component recycling technique is disclosed in, for example, JP-A-2001-108790. The filtration and recycling technique shown in this Japanese Unexamined Patent Publication No. 2001-108790 will be described based on FIGS. 8A to 8C .

As shown in FIG. 8A , when sewage flows parallel to the component 100 made of ceramic filter as indicated by arrow A, the solids in the sewage flow from the outer surface 101 to the inner surface 102 of the component 100 (arrow B). At this time, the solid matter 103 is accumulated on the outer surface 101 of the component 100 . Purification of sewage is carried out in this way.

After a certain amount of sewage is treated, as shown in FIG. 8B , water pressure P1 is applied from the inner surface 102 to the outer surface 101 . On the other hand, a water pressure P2 lower than the above water pressure P1 is also applied from the outer surface 101 to the inner surface 102 .

Next, the water pressure P2 is rapidly reduced. Then, as shown in FIG. 8C, the solid matter 103 attached to the outer surface 101 is peeled off by the action of the water pressure P1. Thus, component 100 is reused.

However, when the solid matter 103 is mainly mud, since the mud is soft, the above-mentioned recycling proceeds smoothly.

However, when a large amount of sand and fine metals are mixed into the solid matter 103 , the solid matter 103 becomes difficult to remove because the solid matter 103 is in a state where aggregates such as sand are embedded in mud and becomes hard as a whole. In particular the difficulty increases as the thickness of the deposit increases. The above-mentioned reuse is not suitable for sewage containing a large amount of sand and the like.

Therefore, a filter technology suitable for the treatment of sewage containing a large amount of sand and the like is sought.

Contents of the invention

In the following description, "backwashing" is an abbreviation for backwashing. Backflow cleaning is cleaning by causing the fluid to flow in the opposite direction of the filter flow. In addition, "recycling" refers to removing dirt from parts and reusing parts.

According to the present invention, a kind of sewage filtering device is provided, which filters sewage mixed with solid matter, which includes: a container for storing the sewage, a sewage introduction pipe connected to the container and leading the sewage into the container, and a A cylindrical member that removes the dirt containing the solid matter from the sewage flowing from the outside to the inside in the container, and a clean water delivery pipe that guides the filtered clean water out of the container are arranged in the A washing water spray pipe that sprays washing water to the outer surface of the cylindrical member in the container, rotates the cylindrical member when spraying the washing water, and makes the outer surface of the cylindrical member evenly face the washing water A rotation mechanism of the spray pipe, a backwash fluid supply pipe for supplying fluid into the cylindrical member and backwashing the cylindrical member after the rotation by the rotating mechanism stops, extending from the bottom of the container and utilizing the cleaning The water and the fluid discharge the dirt including the fallen solids to the outside of the container through the attachment delivery pipe.

In the first stage, most of the solids can be dropped by washing the outer peripheral surface of the cylindrical member, and in the second stage, the fine solids embedded in the filter can be cleaned by backwashing, so that it can be performed with high precision. Advantages of reuse. As a result, a large amount of sewage containing sand and the like can be treated.

Preferably, a plurality of cylindrical members are arranged around the washing water spray pipe. There is an advantage in that a plurality of cylindrical members can be efficiently washed with one clean water spray pipe.

It is preferable that the said purified water delivery pipe is equipped with the activated carbon filter which further filters the filtered purified water. Fine sand and the like that cannot be filtered by the cylindrical member can be reliably filtered. Thereby improving the filtration accuracy.

Preferably, the fluid used for backwashing is compressed air. The first stage of washing is carried out with water, and most of the dirt is dropped. Compressed air is sufficient for the second stage of cleaning. Compared with the situation where water is used in both the first stage and the second stage, according to the present invention, water can be saved.

Description of drawings

Below, the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the figure,

Fig. 1 is the sectional view of sewage filtering device of the present invention;

Fig. 2 is the 2-2 line sectional view of Fig. 1;

Fig. 3 is an action diagram illustrating a usual filtering operation;

FIG. 4 is a diagram illustrating a first stage of a reuse operation;

FIG. 5 is a diagram illustrating a second stage of the reuse operation;

Fig. 6 is a flow chart of filtering operation and reuse operation;

Fig. 7 is a schematic diagram of a workpiece cleaning machine equipped with a filtering device;

8A to 8C are diagrams illustrating conventional filtering work and recycling work.

Detailed ways

As shown in Figure 1, the filtering device 10 comprises: a container 11 opened above, an intermediate plate 12 arranged on the upper part of the container 11 in a manner of blocking the container 11, a cylinder 13 overlapping on the intermediate plate 12, and a cylinder 13 overlapping on the intermediate plate 12. A cover body 14 on the cylinder body 13 and used as a cover of the cylinder body 13, a hollow body 15 vertically penetrating the above-mentioned middle plate 12 and rotatably supported by the middle plate 12 via a bearing 16, and a chain provided at the upper end of the hollow body 15 The wheel 24, the cylindrical member 17 supported on the lower end of the hollow body 15 and extending vertically into the container 11, the passage provided in the hollow body 15 and communicating the inside of the cylindrical member 17 with the inside of the cylindrical body 13 18. The cleaning water spray pipe 21 arranged in the container 11 and placed vertically between the plurality of cylindrical parts 17, the rotation mechanism 25 for rotating the above-mentioned sprocket 24, is arranged on the lower side of the container 11 and guides the sewage into the container 11 The sewage inlet pipe 27, the sewage discharge pipe 28 arranged on the bottom side of the container 11 and used to discharge the sewage from the container 11, and the sewage discharge pipe 28 arranged on the bottom surface of the container 11 and used to send out the attachments that are peeled off by cleaning to the outside The pipe 29, the clean water container 32 connected to the clean water injection pipe 21 via the clean water inlet pipe 31, the activated carbon filter 34 arranged outside the cylindrical body 13 and further filtering the filtered water, arranged near the activated carbon filter 34 and Measuring the flow meter 35 of the filtered water flow rate, the front end is connected to the cylindrical body 13 and includes the purified water delivery pipe 36 of the above-mentioned activated carbon filter 34 or flowmeter 35, and the front end of the purified water delivery pipe 36 split is connected to the cylindrical body 13 and A backwash fluid supply pipe 37 that supplies compressed air into the cylindrical body 13 .

As shown in Figure 2, the rotating mechanism 25 includes: a rotating shaft 38 extending toward the surface and the back direction in the figure, a rotating shaft sprocket 39 arranged on the rotating shaft 38, and The chain 41 of the sprocket 24 is set and driven in such a way that the sprocket 24 is connected.

In addition, as shown in FIG. 1 , a motor 43 for driving the above-mentioned rotation mechanism 25 is provided on the upper portion of the cover body 14 . The upper surface of the container 11 , the intermediate plate 12 and the lower surface of the cylindrical body 13 are connected by long bolts 45 , and the cylindrical body 13 and the lid body 14 are connected by short bolts 46 . 47 , 48 , 49 , 51 , 52 , and 53 are valves for opening and closing pipes, 54 is a sealing material, and an O-ring is suitable.

The following describes the effect of the filtering device constituted by the above structure. That is, the normal filtering operation will be described based on FIG. 3 , the operation of the first stage of reuse will be described based on FIG. 4 , the operation of the second stage of reuse will be described based on FIG. 5 , and the flow of the overall operation will be described based on FIG. 6 . In addition, in FIGS. 3 to 5 , black arrows indicate the flow of water, and white arrows indicate the flow of air.

As shown in FIG. 3 , the sewage introduced into the container 11 from the sewage introduction pipe 27 flows from the outer peripheral surface of the cylindrical member 17 to the inner peripheral surface, and the first-stage filtration is performed through the cylindrical member 17 . The filtered clean water flows from the clean water outlet 22 to the cylindrical shell 13, and is filtered by the activated carbon filter 34 through the clean water delivery pipe 36.

Fine sand and the like that cannot be filtered by the cylindrical member 17 can be reliably filtered. Thereby improving the filtration accuracy.

Therefore, purified water purified in two stages by the cylindrical member 17 and the activated carbon filter 34 can be continuously obtained. However, as the cleaning operation proceeds, solid matter such as sand contained in sewage accumulates on the outer peripheral surface of the cylindrical member 17, resulting in a decrease in filtering capacity. Therefore, the following recycling work should be carried out appropriately.

As shown in FIG. 4 , in the first stage of reuse, the sewage introduction valve 47 is first closed to stop the introduction of sewage into the container 11 . Next, the sewage discharge valve 49 is opened. In this way, the sewage stored in the container 11 can be discharged to the outside as shown by the white arrow at the bottom right of FIG. 4 .

After the discharge of sewage is completed, the sewage discharge valve 49 is closed, and the motor 43 is operated to rotate the cylindrical member 17 as indicated by the arrow. At the same time, the washing water introduction valve 51 is opened. Then, as shown by the black arrow, the washing water can be sent from the clean water container 32 to the washing water spray pipe 21 . The washing water is sprayed from the washing water spray pipe 21 toward the outer peripheral surface of the cylindrical member 17 as indicated by phantom lines, and the attached matter on the cylindrical member 17 is washed.

Most of the solid matter accumulated on the outer peripheral surface of the cylindrical member 17 can be removed by this washing water. In particular, the water pressure of the washing water can effectively make sand and fine metals mixed into the mud and harden deposits fall.

In addition, since the cylindrical member 17 is rotated at a constant speed by the motor 43, the washing water shown by the phantom line is uniformly sprayed over the entire circumference of the cylindrical member 17 without uneven washing. That is, a plurality of (for example, six) cylindrical members 17 can be washed collectively with one washing water spray pipe 21 .

After the cleaning water injection pipe 21 has been cleaned for a certain period of time, the cleaning water introduction valve 51 is closed to end the cleaning with clean water.

Next, as shown in FIG. 5 , in the second stage of reuse, first, the washing water introduction valve 51 is closed. Next, the backwash fluid introduction valve 52 is opened, and compressed air is fed from the backwash fluid supply pipe 37 to the cylinder body 13 as indicated by the black arrow. The compressed air sent into the cylindrical body 13 flows from the inner peripheral surface of the cylindrical member 17 to the outer peripheral surface through the purified water outlet 22 .

As indicated by the white arrow, the solid matter adhering to the outer peripheral surface of the cylindrical member 17 is discharged to the outside by compressed air. Since air is less dense than water, the cleaning performance is reduced. However, in the present invention, since most of the deposits are cleaned in the first stage of the recycling operation, the amount of remaining deposits is small, and the thickness of the layer is also small. Therefore, in the second stage, cleaning with compressed air is also possible.

There is no problem in carrying out the second-stage washing with washing water, but as in the present invention, if compressed air is used, the amount of washing water to be used can be reduced.

After performing the compressed air backwash for a certain period of time, the backwash fluid introduction valve 52 is closed to end the compressed air backwash.

Next, the deposit discharge valve 53 is opened. In this way, as shown by the white arrow in the lower part of the figure, the solids stored in the bottom of the container 11 and the cleaning water used in the first stage are sent out from the attachment delivery pipe 29, and the cleaning of the cylindrical member 17 ends.

Next, the operations in FIGS. 3 to 5 described above will be comprehensively described based on FIG. 6 .

As shown in FIG. 6, in step (hereinafter referred to as ST) 01, the processing flow rate Q1 is set. Then, the sewage is introduced into the sewage tank, and the sewage is filtered by the cylindrical part (ST02). Meanwhile, the integrated flow rate Q2 is measured (ST03). Specifically, the flow rate of filtered water is measured by the flow meter 35 shown in FIG. 1 .

It is checked whether the integrated flow rate Q2 has reached the processing flow rate Q1 (ST04). If it is less than Q1, the sewage will be filtered next (ST02), and if it reaches Q1, the filtration will be stopped (ST05). Specifically, the sewage introduction valve 47 shown in FIG. 1 is closed.

Discharge the sewage in the sewage tank from the sewage outlet (ST06).

The cylindrical member is rotated (ST07), and while rotating, clean water is sprayed on the outer peripheral surface of the cylindrical member to wash the cylindrical member (ST08).

Backwash the cartridge with compressed air (ST09).

The deposits stored at the bottom of the sewage tank and the clean water sprayed in ST08 are discharged to the outside of the sewage tank (ST10).

The filter device 10 described above can be used for various purposes. Here, an example of application to a workpiece cleaning device will be described.

As shown in FIG. 7 , the workpiece cleaning device 60 includes a mesh-shaped workpiece mounting plate 62 on which a workpiece 61 to be cleaned is placed, and a sewage tank 63 that receives sewage generated when the workpiece 61 is cleaned.

One port of the three-way valve 55 is connected to the flow meter 35 , one of the remaining ports of the three-way valve 55 is connected to the water purification container 32 , and the other is connected to the workpiece cleaning device 60 .

The purified water filtered by the filter device 10 flows into the purified water container 32 as indicated by an arrow (1) until it is stored to a predetermined amount. After a predetermined amount of purified water is stored in the purified water container 32, the three-way valve 55 is switched. When the three-way valve 55 is switched, as shown by the arrow (2), the clean water is sent to the workpiece cleaning device 60 .

The workpiece 61 is cleaned as indicated by the arrow (4) by the purified water sent to the workpiece cleaning device 60 and the purified water introduced from the workpiece washing water inlet pipe 64 indicated by the arrow (3). By washing the workpiece 61, the sand and the like adhering to the workpiece 61 are dropped into the sewage tank 63 together with water as indicated by an arrow (5).

The sewage stored in the sewage tank 63 is introduced into the filter device 10 through the sewage introduction pipe 27 as indicated by the arrow (6). The introduced sewage is filtered in the filter device 10, and (1) to (6) are repeated.

Since the filtered clean water is used for washing the workpiece 61, waste water does not need to be discarded, thereby contributing to environmental protection. The amount of clean water introduced from the workpiece washing water introduction pipe 64 can be reduced. And the purified water obtained by filtration is made to flow into a water purification container, and the cylindrical member is reused using this purified water. The amount of purified water introduced from the outside can be reduced, thereby suppressing operating costs in using a filter device.

Claims (4)

1, a kind of sewage filter device (10), it filters the sewage of sneaking into solid content, it is characterized in that, comprising:

Store described sewage container (11),

Be connected with this container (11) and with sewage import sewage ingress pipe (27) in this container,

The dirt that is disposed in the described container and will contains described solid content from flow to from the outside cylindrical part (17) removed the inboard sewage,

The water purification that water purification after filtering is derived outside described container send pipe (36),

Be disposed in the described container and to the rinse water playpipe (21) of the lateral surface jet cleaning water of described cylindrical part,

The lateral surface that when spraying this rinse water, makes described cylindrical part rotation and make this cylindrical part equably towards the rotating mechanism (25) of described rinse water playpipe,

The rotation of being undertaken by this rotating mechanism stop the back in described cylindrical part, supplying with fluid and adverse current clean the back washing fluid supply line (37) of cylindrical part,

The attachment that the dirt that extends from the bottom of described container and utilize described rinse water and described fluid will comprise the solid content that drops is discharged outside container is sent pipe (29).

2, effluent treatment plant as claimed in claim 1 is characterized in that, described cylindrical part disposes a plurality of around described rinse water playpipe.

3, effluent treatment plant as claimed in claim 1 is characterized in that, described water purification is sent pipe and is equipped with the active carbon filter (34) that the water purification after filtering is further filtered.

4, effluent treatment plant as claimed in claim 1 is characterized in that, the described fluid that is used for back washing is a compressed air.

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