JP3413258B2 - Paint sludge removal equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an apparatus for separating and removing paint sludge from washing water that has taken in paint mist generated in a coating booth using oil-based paint, organic solvent-based synthetic resin paint, water-based paint, etc. It is about.

[0002]

2. Description of the Related Art In a coating booth using oil-based paints, organic solvent-based synthetic resin paints, water-based paints, etc., use a water mist, a running water surface, spray water, a venturi device, etc. to scatter paint mist. It takes it into the wash water to purify the exhaust gas. The wash water that has taken in the paint mist is collected in a circulation tank, and the paint sludge is separated by sedimentation, floating and the like. The wash water from which the paint sludge has been separated is
It is sent back into the painting booth and used to collect paint mist.

[0003]

The sludge cannot be sufficiently separated from the washing water due to sedimentation, floating, etc. in the circulation tank, and the washing water recirculated to the painting booth is far from clear. It was The paint sludge accumulated in the circulation tank has tackiness, and even if a mechanical removing means is provided, the paint sludge adheres to the means and impairs its function.
After all, sludge must be removed manually. Therefore, in the conventional paint sludge removing apparatus, a great deal of labor is required for the sludge removing work. The present invention has been made in view of the above problems, it is possible to separate the paint sludge from the wash water in which the paint mist is taken in by sufficiently losing the viscosity, and the separated paint without much labor. An object of the present invention is to provide a paint sludge removing device capable of removing sludge from the device.

[0004]

In order to solve the above problems, in the present invention, a circulation tank and a processing tank disposed above the circulation tank are provided, and the circulation tank recirculates from a coating booth. Having a first section including an inflow portion of the washed water and a second section including an outflow portion of the wash water flowing back to the coating booth, and the first section and the second section are separated by a strainer,
The treatment tank has a first flow path extending vertically and a second flow path extending vertically adjacent to the first flow path and having an upper part communicating with an upper part of the first flow path via a first weir. A flow path, a third flow path adjacent to the second flow path, extending vertically, and a lower portion communicating with a lower part of the second flow path, and a vertical flow path extending vertically adjacent to the third flow path. A fourth part, which communicates with the upper part of the third flow path through the second weir.
A flow path, a first water retention section located above the first flow path and the second flow path and communicating with an upper part of the first flow path and an upper part of the second flow path, and the third flow path and the third flow path. It has the 2nd play water division located above 4 channels and communicating with the upper part of the 3rd flow path and the upper part of the 4th flow path, and the 1st play water section and the 2nd play water section are by a wall. Separated, a third weir is formed on the peripheral wall of the first water retention section, the second weir is above the first weir, the third weir is above the second weir, Peripheral wall of 1 water retention section and 2nd
The peripheral wall of the water retaining section extends above the third weir, and the first flow path is defined by a plurality of aluminum electrode plates arranged at a predetermined interval from each other and extending in a predetermined height direction. And a portion of the first flow path below the aluminum electrode plate and the first section of the circulation tank are connected by a fifth flow path in which a pump is disposed on the way, and a fourth flow path and the circulation tank. Is connected to the area near the outflow portion of the wash water flowing back to the coating booth by an openable and closable sixth flow path, and is located outside the treatment tank adjacent to the third weir formed on the peripheral wall of the first water retention section. Provided is a paint sludge removing device characterized in that a sludge receiving tank containing a filter is disposed, and the sludge receiving tank and the circulation tank are connected by a seventh flow path.

Further, in the present invention, the circulation tank, the first treatment tank disposed above the circulation tank, and the first treatment tank disposed above the circulation tank and below the first treatment tank. The treatment tank includes two treatment tanks, and the circulation tank has a first section including an inflow portion of the wash water refluxed from the coating booth and a second section including an outflow portion of the wash water refluxed to the coating booth. The compartment and the second compartment are separated by a strainer, and the first treatment tank is
A first flow path extending vertically, and a second flow path extending vertically adjacent to the first flow path and having an upper portion communicating with an upper portion of the first flow path via a first weir. The first processing tank has a first peripheral wall
The plurality of aluminum electrode plates that extend above the weir of the first flow path and are spaced apart from each other by a predetermined distance and extend in the vertical direction. Is a third flow passage extending vertically, and a fourth flow passage extending vertically adjacent to the third flow passage and having an upper portion communicating with an upper portion of the third flow passage via a second weir. And a fifth channel that vertically extends adjacent to the fourth channel and has a lower portion communicating with a lower portion of the fourth channel, and a fifth channel that vertically extends adjacent to the fifth channel and has an upper portion A sixth channel communicating with an upper portion of the fifth channel via the third weir, and an upper portion of the third channel and a fourth channel located above the third channel and the fourth channel. A first water retaining section that communicates with an upper portion of the second channel, and a second water retaining section that communicates with an upper portion of the fifth channel and an upper portion of the sixth channel located above the fifth channel and the sixth channel. With compartments, first The water compartment and the second water retention compartment are separated by a wall, a fourth weir is formed on the peripheral wall of the first water retention compartment, the third weir is above the second weir, and the fourth weir is It is located above the third weir, and is connected to the peripheral wall of the first water retention section and the second wall.
The peripheral wall of the water retaining section extends above the fourth weir, and the third flow path is defined by a plurality of aluminum electrode plates which are arranged at a predetermined distance from each other and which extend vertically, and thus the third flow path extends in a predetermined height direction. And a portion below the aluminum electrode plate in the first flow path of the first treatment tank and the first section of the circulation tank are connected by a seventh flow path in which a pump is disposed, A portion of the third channel of the treatment tank below the aluminum electrode plate and the second channel of the first treatment tank are connected by an eighth channel,
The sixth flow path of the second treatment tank and the area near the outflow portion of the wash water flowing back to the coating booth of the circulation tank are connected by a ninth flow passage that can be opened and closed, and the peripheral wall of the first water retention section of the second treatment tank. A sludge receiving tank having a built-in filter is disposed outside the processing tank adjacent to the fourth weir formed in the above, and the sludge receiving tank and the circulation tank are connected by a tenth flow path. A paint sludge removing device is provided.

[0006]

According to the present invention, the cleaning water in which the paint mist is taken in in the coating booth flows into the first section of the circulation tank, and further passes through the fifth flow path in which the pump is arranged on the way. , Flows into the portion below the aluminum electrode plate in the first flow path of the processing tank. While the cleaning water rises between the adjacent aluminum electrode plates, strong oxidative and reducing actions of nascent oxygen and hydrogen generated as a result of the electrode surface reaction by the direct current applied to the aluminum electrode plates, or the aluminum electrode The paint sludge is efficiently separated from the wash water and the viscosity of the paint sludge is removed by the action of aluminum hydroxide, oxygen, hydrogen and the like generated by the electrolytic action between the plates. The sludge separated from the wash water floats along with fine bubbles of oxygen and hydrogen gas generated by electrolysis.
Accumulates on the liquid surface of the first water retention section above the aluminum electrode plate. The wash water from which the sludge has been separated flows from the upper part of the first flow path, over the first weir, and into the upper part of the second flow path,
It descends in the second flow path. Also at this time, the paint sludge remaining in the wash water floats up and is removed. Next, the wash water flows from the lower part of the second flow path to the lower part of the third flow path, rises in the third flow path, and then flows from the upper part of the third flow path to the second part.
Flows over the weir of No. 4 and flows into the fourth flow path. The cleaning liquid that has flowed into the fourth flow path flows through the sixth flow path into a region near the outflow portion of the cleaning water that flows back to the coating booth of the circulation tank. The cleaning liquid that has flowed into the circulation tank is sent into the coating booth again by the circulation pump and is used for collecting the paint mist. When the sixth flow path is closed, the water levels in the first water retention section and the second water retention section rise. When the water level in the first water retention section rises to the height of the third weir, the wash water in the first water retention section flows out of the treatment tank together with the accumulated paint sludge over the third weir. , Flows into the sludge receiving tank. As a result, paint sludge is removed from the processing tank. In the sludge receiving tank, the paint sludge is captured by the filter. The cleaning water from which the paint sludge has been removed is returned to the circulation tank through the seventh flow path. By periodically cleaning the filter or periodically replacing the filter, paint sludge is discharged from the sludge receiving tank. If sufficient electrode area and passage time cannot be secured in one treatment tank due to restrictions on the height of the installation location, etc., connect multiple treatment tanks and repeatedly perform electrolytic treatment of washing water. May be.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the paint sludge removing apparatus according to this embodiment includes a circulation tank 1 and a treatment tank 2 arranged above the circulation tank 1. The circulation tank 1 has a first section 11 including an inflow portion of the wash water that recirculates from the coating booth, and a second section 12 including an outflow portion of the wash water that recirculates to the coating booth. The strainer 13 separates the two sections 12.

The processing tank 2 has a first flow path 21 extending vertically.
A second flow path 22 that extends vertically adjacent to the first flow path 21 and has an upper portion communicating with an upper portion of the first flow path 21 via a first weir 21a; and a second flow path 22. Adjacent to the third flow path 23, which vertically extends adjacent to the second flow path 22 and has a lower portion communicating with the lower portion of the second flow path 22. It has a fourth flow path 24 communicating with an upper portion of the third flow path 23 via the weir 23a. The processing tank 2 is further positioned above the first flow path 21 and the second flow path 22 and has a first flow path.
A first water retention section 25 communicating with an upper portion of the flow passage 21 and an upper portion of the second flow passage 22, a third flow passage 23, and a fourth flow passage 24.
Located above the third flow path 23 and the fourth flow path 2
4 has an upper part of 4 and the 2nd play water section 26 which connects.

The first water retaining section 25 and the second water retaining section 26 are separated by a wall. A third weir 27 is formed on the peripheral wall of the first water retaining section 25. The second weir 23a is the first
Above the weir 21a, and the third weir 27 is above the second weir 23a. The peripheral wall of the first water retaining section 25 and the peripheral wall of the second water retaining section 26 extend above the third weir 27.

The first flow path 21 is arranged at a distance of 20 to 50 mm from each other, and a predetermined height range is occupied by a plurality of vertically extending aluminum electrode plates 3. A portion 21b of the first flow path 21 below the aluminum electrode plate 3 and the first section 11 of the circulation tank are connected by a pipe line 5 on which a pump 4 is disposed. The pipe line 5 extends into the lower portion 21b of the first flow path of the processing tank 2, and the end opening 5a is directed downward. The fourth flow path 24 and the second section 12 of the circulation tank 1 are connected by a pipe line 7 which can be opened and closed by a valve 6. A sludge receiving tank 9 containing a filter 8 is disposed outside the processing tank 2 adjacent to the third weir 27 formed on the peripheral wall of the first water retention section 25. The first section 11 is connected by a pipe line 10.

The operation of the paint sludge removing apparatus according to this embodiment having the above structure will be described below. The cleaning water in which the paint mist is taken in in a coating booth (not shown) flows into the first section 11 of the circulation tank 1, and further passes through the pipe line 5 in which the pump 4 is arranged on the way to the first section 11 of the processing tank 2. It flows into a portion 21b of the one flow passage 21 below the aluminum electrode plate 3. The cleaning water that has flowed into the lower portion 21b of the first flow path 21 passes between the adjacent aluminum electrode plates 3 and rises. Since the pipe 5 extends into the lower portion 21b of the first flow passage 21 and the end opening 5a is directed downward, the cleaning water flowing into the lower portion 21b is planar along the bottom of the treatment tank. Spread and then rise. As a result, the cleaning water rises uniformly between all the adjacent aluminum electrode plates 3. The aluminum electrode plates 3 are alternately connected to positive and negative DC power supplies, a voltage of 5 to 20 V is applied between the adjacent aluminum electrode plates 3, and 0.02 to 0.2 A is applied.
A direct current is applied at a current density of / dm ² .

While the washing water rises between the adjacent aluminum electrode plates 3, the strong oxidative and reducing action of nascent oxygen and hydrogen generated as a result of the electrode surface reaction of the aluminum electrode plates 3 causes the oxidative or reducing action of aluminum. The paint sludge is separated from the wash water and the viscosity of the paint sludge is removed by the action of aluminum hydroxide, oxygen, hydrogen, etc. generated by the electrolytic action between the electrode plates 3. By setting the distance between the adjacent aluminum electrode plates 3 to 20 to 50 mm, a smooth flow of washing water, a large number of electrode plates, and a wide electrode surface area are secured. Thereby, the separation of the paint sludge from the wash water and the viscosity removal of the paint sludge are efficiently performed. In order to prevent aluminum hydroxide or the like generated by the electrolytic action from adhering to the aluminum electrode plate 3 and suppressing the electrolytic action, a 5-2
The polarity of the DC power source applied to the aluminum electrode plate 3 is switched every 0 minutes. Further, in order to secure the current density between the adjacent aluminum electrode plates 3, an appropriate amount of an electrolytic substance such as salt is added to the washing water at the start of the operation, if necessary.

The paint sludge separated from the wash water floats along with the fine bubbles of oxygen gas and hydrogen gas generated by the electrolytic action, and accumulates on the liquid surface of the first water-retention compartment 25. In order to ensure that the sludge separated from the cleaning water is trapped by the fine bubbles of oxygen gas and hydrogen gas, the speed at which the cleaning water rises between the adjacent aluminum electrode plates 3 is controlled by the oxygen gas and hydrogen. The rate at which the gas bubbles rise in the wash water is slower. Specifically, the rising speed of the wash water is 1
It is set to about 30 dm / min.

The washing water from which the sludge has been separated passes over the first weir 21a from the upper portion of the first flow passage 21 and the second flow passage 2
It flows into the upper part of 2 and descends in the second flow path 22. Also at this time, the paint sludge remaining in the wash water floats up and is removed. The liquid level of the first water retaining section 25 is the second weir 23a.
Since it has the same height as that of the first weir 21a and is sufficiently higher than that of the first weir 21a, the washing water descending in the second flow path can be used for the first water retention section 25.
There is little risk that paint sludge accumulated on the liquid surface will be caught. In order to more reliably prevent the paint sludge from being caught, the cross-sectional area of the second flow path is made relatively large and the descending speed of the wash water is made sufficiently slow. Specifically, the descending speed is set to about 10 to 40 dm / min.

The washing water that has descended through the second flow passage 22 flows from the lower portion of the second flow passage 22 into the lower portion of the third flow passage 23, rises in the third flow passage 23, It flows from the upper part of 23 over the second weir 23 a and into the fourth flow path 24.
The water level in the processing tank 2 is maintained at the height of the second weir 23a during the steady processing. The second weir 23a can also be used as a metering weir. Thereby, the flow rate of the wash water to be treated can be detected. The cleaning liquid flowing into the fourth flow path 24 is
It flows into the second section 12 of the circulation tank 1 through the pipe 7. The cleaning liquid that has flowed into the second section 12 of the circulation tank is mixed with the cleaning water that has directly flowed from the first section 11 of the circulation tank 1 through the strainer into the second section 12, and the circulation pump (not shown) again causes the coating booth to reappear. It is sent inside and used for collecting paint mist.

The pipe 7 is closed by the valve 6 when the amount of the paint mist accumulated on the liquid surface of the first water retaining section 25 reaches a predetermined value. Thereby, the first water retention section 25 and the second
The water level in the water retaining section 26 rises. When the water level in the first water retention section 25 rises to the height of the third weir 27, the wash water in the first water retention section 25, together with the accumulated paint sludge, crosses over the third weir 27 and reaches the treatment tank. 2 and flows into the sludge receiving tank 9. As a result, paint sludge is removed from the processing tank 2. In the sludge receiving tank 9, the paint sludge is captured by the filter 8. The wash water from which the paint sludge has been removed is returned to the first section 11 of the circulation tank 1 through the pipe line 10. The paint sludge is discharged from the sludge receiving tank 9 by regularly cleaning the filter 8 or periodically replacing the filter 8.

After the paint sludge accumulated on the liquid surface of the first water retention section 25 flows over the third weir 27 to the outside of the processing tank 2, the pipe line 7 is opened by the valve 6, and the processing tank 2 is opened. The water level inside is returned to the height of the second weir 23a, and the steady processing of the wash water is continued.

As can be seen from the above description, in the present removing apparatus, the cleaning water is efficiently used in the treatment tank 2 by utilizing the electrode surface reaction of the aluminum electrode plates 3 and the electrolytic action between the aluminum electrode plates 3. The paint sludge is separated from the treatment tank 2 to lose its viscosity, and the separated paint sludge is removed from the treatment tank 2 by controlling the water level in the treatment tank 2. Therefore, unlike the conventional paint sludge removal device, The paint sludge can be sufficiently separated, and a great deal of labor is not required to remove the separated paint sludge.

The cleaning water returned from the treatment tank 2 to the circulation tank 1 contains a trace amount of aluminum hydroxide and also has oxygen gas dissolved therein, so that the paint sludge is separated and the viscosity of the paint sludge is removed. Since it has a function, the paint sludge is separated from the wash water and the viscosity of the paint sludge is removed even in the circulation tank 1. In addition, the wash water is returned to the coating booth and used in the coating booth, so that the paint mist adhering to the structure inside the coating booth is removed, and the labor for cleaning the coating booth is reduced. To be done.

A second embodiment of the present invention will be described with reference to FIG. As shown in FIG. 2, in the paint sludge removing apparatus according to the present embodiment, a mesh electrode 28 made of SUS wire is arranged on the bottom of the second flow path 22 of the processing tank 2, and an insoluble electrode plate made of graphite or the like is arranged. A counter electrode having 29 arranged in the lower stage is arranged. The electrode 28 is connected to a negative DC power supply, and the electrode 29 is connected to a positive DC power supply. The cross-sectional area of the second flow path 22 of the processing tank 2 is set wider than that of the first embodiment.
The flow rate of the cleaning liquid flowing down the flow path 22 is slower than that in the first embodiment. Except for the above, the structure of the paint sludge removing device according to the present embodiment is the same as the structure of the paint sludge removing device according to the first embodiment.

In the present paint sludge removing apparatus, while fine bubbles of oxygen and hydrogen gas generated by the electrolysis of the current flowing between the electrodes 28 and 29 rise in the second flow path 22, Traps paint sludge remaining in the wash water,
Take it to the liquid level. This makes the removal of paint sludge from the wash water more complete. The flow rate of the cleaning liquid flowing down the second flow path is slower than that of the first embodiment in order to promote the capture of paint sludge by fine bubbles of oxygen and hydrogen gas.
It is set to ˜30 dm / min. The electrode 28,
As 29, an aluminum wire mesh electrode may be used. In this case, it is necessary to switch the polarity of the applied power source at predetermined time intervals.

A third embodiment of the present invention will be described with reference to FIG. As shown in FIG. 3, in the paint sludge removing apparatus according to this embodiment, the treatment tank 2 in the first embodiment is
It is arranged as a second processing tank, and the first processing tank 100 is arranged between the second processing tank 2 and the circulation tank 1. The first processing tank 100 is arranged above the second processing tank 2. As shown in FIG. 3, the first processing tank 100 includes a first flow path 101 extending vertically and an upper part extending vertically adjacent to the first flow path 101 with a first weir 101a interposed therebetween. First
The second flow path 102 communicates with the upper portion of the flow path 101. The peripheral wall of the first treatment tank 100 is the first weir 101a.
Extends upwards. The first channel 101 has two
A predetermined range in the height direction is occupied by the plurality of aluminum electrode plates 3 which are arranged at intervals of 0 to 50 mm and extend vertically. First flow path 1 of first treatment tank 100
01 part 101b below the aluminum electrode plate 3
The first section 11 of the circulation tank and the first section 11 of the circulation tank are connected to each other by a pipe line 5 on which the pump 4 is disposed. The conduit 5 extends into the lower part 101b of the first flow path, the end opening 5a being directed downwards. A portion 21b of the first flow path 21 of the second processing tank 2 below the aluminum electrode plate 3 and the second flow path 102 of the first processing tank 100 are connected by a pipe line 5 '. The pipe line 5 ′ is the lower portion 2 of the first flow path of the second processing tank 2.
1b, the end opening 5a 'is directed downwards. Except for the above, the structure of the paint sludge removing device according to the present embodiment is the same as the structure of the paint sludge removing device according to the first embodiment.

In the present paint sludge removing apparatus, the first
The cleaning liquid treated in the treatment tank 100 together with the separated paint sludge, the second flow passage 102 and the pipe 5'of the first treatment tank.
Through, and flows into the second treatment tank 2, and is further processed in the second treatment tank 2. The present paint sludge removing device is effective in the case where it is not possible to secure a sufficient electrode area and passing time in one processing tank due to the height restriction of the installation place and the like. Further, in the present paint sludge removing apparatus, the cleaning liquid treated in the first treatment tank 100 flows into the second treatment tank 2 through the second flow passage 102 and the pipe 5'of the first treatment tank. At this time, since they are mixed by stirring, more complete processing can be expected. The first processing tank 100 and the second processing tank 2
It is, of course, possible to integrally configure and without separating them.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, in FIG.
As shown by the alternate long and short dash line, the treated cleaning water is removed from the second flow passage 22 or the third flow passage 23 of the treatment tank 2 by using the pipe line 202 in which the pump 201 is disposed on the way. Lead to the water retaining section 25 and to a position almost at the same height as the third weir 27,
The treated cleaning water may be discharged toward the third weir 27. This accelerates the removal of the paint sludge from the processing tank 2. Further, as indicated by a chain double-dashed line in FIG. 1, a plate member 301 that extends vertically toward the third weir 27 at the same height position as the third weir 27 in the first water retention section 25. May be provided with a skimmer for intermittently reciprocating horizontally by the air cylinder 302 or the like. This also removes the paint sludge from the processing tank 2. In this case, since it is not necessary to adjust the water level of the processing tank 2 by opening / closing the pipe line 7, the valve 6 need not be installed.

First to fourth channels 21 to 24 in the processing tank 2
The relative positional relationship of is not limited to that shown in FIG. For example, the second flow path 22 to the fourth flow path 24 may be arranged on the front side of the first flow path 21 in the drawing or on the rear side of the first flow path 21 in the drawing. In addition, the second flow path 22 is connected to the third weir 27.
Is disposed below the weir 27, and an opening is formed in the side wall of the processing tank below the weir 27 so that the upper part of the second flow path 22 communicates with the upper part of the first flow path 21. The flow path 24 and the second
It may be arranged on the front side of the paper surface of the flow path 22 or on the rear side of the paper surface of the second flow path 22. Pipelines 7, 10 and first of circulation tank 1
The relationship between the section 11 and the second section 12 is not limited to the relationship in the first embodiment. For example, the lower end of the pipeline 7 may be opened to the first section 11 near the outflow portion of the wash water flowing back to the coating booth, or the lower end of the pipeline 10 may be opened to the second section 12. good. In the first embodiment, a portion of the conduit 7 downstream of the valve 6 may be an open channel such as a gutter. Further, the conduit 10 may be an open channel such as a gutter. Instead of the filter 8, a container or bag having a filter function may be arranged in the sludge receiving tank 9.

[0026]

As described above, in the paint sludge removing apparatus according to the present invention, the paint sludge can be efficiently removed from the cleaning water by utilizing the electrode surface reaction of the aluminum electrode plates and the electrolytic action between the aluminum electrode plates. By removing the viscosity of the paint sludge and controlling the water level in the treatment tank, the separated sludge is discharged from the upper edge of the side wall of the treatment tank to the outside of the treatment tank. The paint sludge can be sufficiently separated from the water, and the separated paint sludge can be discharged from the removing device without much labor.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a paint sludge removing apparatus according to a first embodiment of the present invention.

FIG. 2 is an overall configuration diagram of a paint sludge removing device according to a second embodiment of the present invention.

FIG. 3 is an overall configuration diagram of a paint sludge removing device according to a third embodiment of the present invention.

[Explanation of symbols]

1 circulation tank 2 processing tanks 3 Aluminum electrode plate 4 pumps 5, 7, 10 pipeline 6 valves 8 filters 9 Sludge receiving tank 21 First flow path 21a First weir 21b Lower part of the first flow path 22 Second channel 23 Third channel 23a Second weir 24 Fourth Channel 25 First play area 26 Second play area 27 Third Weir 28, 29 electrodes

Continuation of the front page (56) Reference JP-A-6-304568 (JP, A) JP-A-6-165988 (JP, A) JP-A-1-194992 (JP, A) JP-A-61-19799 (JP , A) JP 52-126059 (JP, A) JP 52-121962 (JP, A) JP 52-42468 (JP, A) JP 50-70435 (JP, A) JP 50-67277 (JP, A) JP 50-66048 (JP, A) JP 48-69354 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C02F 1/46 B05B 15/04

Claims (8)

(57) [Claims] 1. A circulation tank and a treatment tank disposed above the circulation tank, wherein the circulation tank includes a first section including an inflow portion of wash water that has recirculated from the coating booth, and returns to the coating booth. And a second section including an outflow portion of cleaning water, the first section and the second section are separated by a strainer, and the treatment tank has a first flow path extending vertically and a first flow path. A second flow channel that is vertically adjacent to the second flow channel and has an upper portion communicating with the upper portion of the first flow channel through the first weir; A third flow path that communicates with a lower portion of the second flow path, and a third flow path that is adjacent to the third flow path and extends vertically
A fourth flow path communicating with an upper part of the third flow path via the weir of the first flow path, and an upper part of the first flow path and an upper part of the second flow path located above the first flow path and the second flow path. A first water retention section communicating with the portion, and a second water retention section located above the third flow path and the fourth flow path and communicating with an upper portion of the third flow path and an upper portion of the fourth flow path. And the first and second water retaining sections are separated by a wall, and a third weir is formed on the peripheral wall of the first water retaining section.
The second weir is above the first weir and the third weir is the second
Above the weir, the peripheral wall of the first water retaining section and the peripheral wall of the second water retaining section extend above the third weir, and the first flow path is arranged at a predetermined interval from each other and is vertically arranged. A plurality of extending aluminum electrode plates occupy a predetermined range in the height direction, and the pump is disposed on the way below the aluminum electrode plate of the first flow path and the first partition of the circulation tank. The fifth flow path is connected to the fourth flow path, and the fourth flow path is connected to the area near the outflow portion of the wash water flowing back to the coating booth of the circulation tank by the sixth flow path that can be opened and closed. A sludge receiving tank containing a filter is disposed outside the processing tank adjacent to the third weir formed in the above, and the sludge receiving tank and the circulation tank are connected by the seventh flow path. A paint sludge removing device. 2. The treated cleaning water is sucked from the second flow path or the third flow path, and in the first water retaining section, at the same height as the third weir, toward the third weir, The paint sludge removing apparatus according to claim 1, further comprising means for discharging the treated cleaning water that has been sucked. 3. A circulation tank and a treatment tank disposed above the circulation tank, wherein the circulation tank includes a first section including an inflow portion of wash water that has recirculated from the coating booth, and the circulation to the coating booth. And a second section including an outflow portion of cleaning water, the first section and the second section are separated by a strainer, and the treatment tank has a first flow path extending vertically and a first flow path. A second flow channel that is vertically adjacent to the second flow channel and has an upper portion communicating with the upper portion of the first flow channel through the first weir; A third flow path that communicates with a lower portion of the second flow path, and a third flow path that is adjacent to the third flow path and extends vertically
A fourth flow path communicating with an upper part of the third flow path via the weir of the first flow path, and an upper part of the first flow path and an upper part of the second flow path located above the first flow path and the second flow path. A first water retention section communicating with the portion, and a second water retention section located above the third flow path and the fourth flow path and communicating with an upper portion of the third flow path and an upper portion of the fourth flow path. And the first and second water retaining sections are separated by a wall, and a third weir is formed on the peripheral wall of the first water retaining section.
The second weir is above the first weir and the third weir is the second
Above the weir, the peripheral wall of the first water retaining section and the peripheral wall of the second water retaining section extend above the third weir, and the first flow path is arranged at a predetermined interval from each other and is vertically arranged. A plurality of extending aluminum electrode plates occupy a predetermined range in the height direction, and the pump is disposed on the way below the aluminum electrode plate of the first flow path and the first partition of the circulation tank. The fifth flow path is connected to the fourth flow path, and the fourth flow path is connected to the area near the outflow portion of the wash water flowing back to the coating booth of the circulation tank by the sixth flow path, and is formed on the peripheral wall of the first water retaining section. A sludge receiving tank having a built-in filter is disposed outside the treatment tank adjacent to the third weir, and the sludge receiving tank and the circulation tank are connected by a seventh flow path. , At the same height as the third weir, and extends vertically toward the third weir Paint sludge removal apparatus characterized in that it comprises means for the member is horizontally moved. 4. The paint sludge removing device according to claim 1, wherein a counter electrode is provided at the bottom of the second flow path. 5. A circulation tank, a first treatment tank arranged above the circulation tank, and a second treatment tank arranged above the circulation tank and below the first treatment tank. The circulation tank is equipped with
It has a first section including an inflow portion of the wash water that recirculates from the coating booth and a second section including an outflow portion of the wash water that recirculates to the coating booth, and the first section and the second section are separated by a strainer. , The first treatment tank extends vertically, and vertically extends adjacent to the first passage, and the upper portion communicates with the upper portion of the first passage through the first weir. And a peripheral wall of the first treatment tank extends above the first weir,
The first flow path occupies a predetermined height direction range by the plurality of aluminum electrode plates which are vertically spaced apart from each other and which extend vertically, and the second processing tank has a first flow path extending vertically. A third flow passage, and a fourth passage that vertically extends adjacent to the third flow passage and has an upper portion communicating with the upper portion of the third flow passage via the second weir.
A flow path, a fifth flow path adjacent to the fourth flow path, extending vertically, and a lower portion communicating with a lower part of the fourth flow path, and a vertical flow path extending vertically adjacent to the fifth flow path. A sixth channel whose portion communicates with an upper portion of the fifth channel via the third weir, and an upper portion of the third channel and a fourth channel located above the third channel and the fourth channel. A first water retaining section that communicates with an upper portion of the flow passage, and a first water storage section that is located above the fifth flow passage and the sixth flow passage and that communicates with an upper portion of the fifth flow passage and an upper portion of the sixth flow passage. It has 2 water retention sections, the 1st water retention section and the 2nd water retention section are separated by the wall, the 4th weir is formed in the peripheral wall of the 1st water retention section, and the 3rd weir is more than the 2nd weir. Is also above, the fourth weir is above the third weir, and the peripheral wall of the first water retention section and the peripheral wall of the second water retention section are the fourth
The plurality of aluminum electrode plates that extend upward from the weir and are vertically spaced apart from each other in the third flow path occupy a predetermined height range, and thus the third processing tank The portion of the first flow path below the aluminum electrode plate and the first section of the circulation tank are connected by the seventh flow path on which the pump is disposed, and the third flow path of the second processing tank is connected. The portion below the aluminum electrode plate and the second flow path of the first processing tank are connected by the eighth flow path, and the sixth flow path of the second processing tank and the outflow of the cleaning water flowing back to the coating booth of the circulation tank are connected. Is connected to the area near the section by an openable / closable ninth flow path, and a filter is built in outside the treatment tank adjacent to the fourth weir formed on the peripheral wall of the first water retention section of the second treatment tank. A sludge receiving tank is provided, and the sludge receiving tank and the circulation tank are connected by a tenth flow path. Paint sludge removal apparatus characterized and. 6. The treated wash water is sucked from the fourth flow passage or the fifth flow passage of the second treatment tank, and is located at substantially the same height as the fourth weir in the first water retaining section of the second treatment tank. 6. The paint sludge removing device according to claim 5, further comprising means for discharging the sucked and treated cleaning water toward the fourth weir. 7. A circulation tank, a first treatment tank arranged above the circulation tank, and a second treatment tank arranged above the circulation tank and below the first treatment tank. The circulation tank is equipped with
It has a first section including an inflow portion of the wash water that recirculates from the coating booth and a second section including an outflow portion of the wash water that recirculates to the coating booth, and the first section and the second section are separated by a strainer. , The first treatment tank extends vertically, and vertically extends adjacent to the first passage, and the upper portion communicates with the upper portion of the first passage through the first weir. And a peripheral wall of the first treatment tank extends above the first weir,
The first flow path occupies a predetermined height direction range by the plurality of aluminum electrode plates which are vertically spaced apart from each other and which extend vertically, and the second processing tank has a first flow path extending vertically. A third flow passage, and a fourth passage that vertically extends adjacent to the third flow passage and has an upper portion communicating with the upper portion of the third flow passage via the second weir.
A flow path, a fifth flow path adjacent to the fourth flow path, extending vertically, and a lower portion communicating with a lower part of the fourth flow path, and a vertical flow path extending vertically adjacent to the fifth flow path. A sixth channel whose portion communicates with an upper portion of the fifth channel via the third weir, and an upper portion of the third channel and a fourth channel located above the third channel and the fourth channel. A first water retaining section that communicates with an upper portion of the flow passage, and a first water storage section that is located above the fifth flow passage and the sixth flow passage and that communicates with an upper portion of the fifth flow passage and an upper portion of the sixth flow passage. It has 2 water retention sections, the 1st water retention section and the 2nd water retention section are separated by the wall, the 4th weir is formed in the peripheral wall of the 1st water retention section, and the 3rd weir is more than the 2nd weir. Is also above, the fourth weir is above the third weir, and the peripheral wall of the first water retention section and the peripheral wall of the second water retention section are the fourth
The plurality of aluminum electrode plates that extend upward from the weir and are vertically spaced apart from each other in the third flow path occupy a predetermined height range, and thus the third processing tank The portion of the first flow path below the aluminum electrode plate and the first section of the circulation tank are connected by the seventh flow path on which the pump is disposed, and the third flow path of the second processing tank is connected. The portion below the aluminum electrode plate and the second flow path of the first processing tank are connected by the eighth flow path, and the sixth flow path of the second processing tank and the outflow of the cleaning water flowing back to the coating booth of the circulation tank are connected. A sludge receiving tank having a filter built in outside the treatment tank adjacent to the fourth weir formed on the peripheral wall of the first water retention section of the second treatment tank, which is connected to the area near the section by the ninth flow path. Is arranged,
The sludge receiving tank and the circulation tank are connected by the tenth flow path, and further, in the first water retention section of the second treatment tank, at the same height position as the fourth weir, toward the fourth weir, and up and down. An apparatus for removing paint sludge, characterized in that it is provided with means for horizontally moving a plate member extending to the inside. 8. The paint sludge removing apparatus according to claim 5, wherein a counter electrode is provided at the bottom of the fourth flow path.