JP4187603B2 - Paint sludge separator - Google Patents

Description

In the present invention, a paint component contained in various liquids such as a paint component contained in a cleaning liquid used for purification of exhaust gas from a painting facility is changed to a floating paint sludge that floats on the liquid surface, and the paint sludge is then submerged from the liquid. Regarding the paint sludge separator used for separation and recovery,
Specifically, the floating paint sludge in the separation tank is moved to the take-out portion by a horizontal liquid flow, and the moved floating paint sludge is taken out to the place where the sludge take-out port is disposed in the liquid of the take-out portion by the guide liquid flow. The present invention relates to a paint sludge separation device that lowers and takes out paint sludge from the sludge outlet.

  Conventionally, for this type of paint sludge separation apparatus (see FIGS. 5 and 6), by swirling the liquid W of the extraction portion 14 around the vertical axis P passing through the sludge extraction outlet 25, There existed what formed the swirling flow fc in which the inverted conical liquid level depression E was formed in the swivel center part in the extraction part 14 (refer patent document 1).

In other words, in this conventional apparatus, the floating paint sludge S moved to the take-out portion 14 by the lateral liquid flow f1 is drawn into the inverted conical liquid level depression E located just above the sludge take-out port 25 at the turning center portion. Then, the swirl flow fc is efficiently and collectively lowered to the place where the sludge take-out port 25 is disposed in the liquid W, and is taken out from the sludge take-out port 25 together with the accompanying liquid W. S can be efficiently separated and recovered from the liquid W in the tank.
JP 7-185394 A

  However, in this conventional apparatus, although the separation and recovery efficiency of the paint sludge S can be improved effectively, there is still a large amount of bubbles B floating on the liquid surface together with the paint sludge S (particularly, the paint sludge of the aqueous paint is removed). In the case of the target, a large amount of foam is generated), the liquid level depression E of the swirling flow fc as the extraction guide liquid flow becomes small due to the influence of the foam B, and the floating paint sludge S having a limited foam layer lower surface portion And only the bubbles B are drawn into the liquid level depression E, which causes a problem that the separation and recovery efficiency of the paint sludge S is lowered.

  In addition, the bubble layer cannot be efficiently discharged from the sludge outlet 25, so that the bubble layer grows more and more. This causes problems in operation of the apparatus and increases the burden of maintenance management. It was.

[1] The first characteristic configuration of the present invention is:
The floating paint sludge in the separation tank is moved to the take-out section by a horizontal liquid flow, and the moved floating paint sludge is lowered to the place where the sludge take-out port is disposed in the liquid of the take-out section by the take-out guide liquid flow. In the paint sludge separating device for taking out the paint sludge from the sludge outlet,
In a form in which the liquid is transmitted to the wall surface and flows down in the form of a film , the floating paint sludge together with the surface layer liquid of the extraction part has a falling wall surface that causes the film-like liquid flow to flow into the extraction part as the extraction guide liquid flow. Arranged in a posture facing or inclined with respect to the lateral liquid flow so as to be caught in the inflowing liquid from the falling wall surface,
A liquid wall surface extending from the lower end portion of the flow wall surface into the liquid of the take-out portion in a state connected to the flow wall surface,
The sludge take-out port faces the formation area of the horizontal cylindrical vortex formed in the liquid of the take-out portion by the liquid inflow from the flow-down wall surface.

That is, in this first characteristic configuration, the liquid flows down in the form of a film along the wall surface by the falling wall surface, and flows into the liquid in the extraction portion in the presence of the above-described liquid wall surface, and the surface layer liquid in the extraction portion is accompanied by the liquid inflow. Is entrained in the inflowing liquid (film-like liquid flow) from the falling wall surface, thereby forming a horizontal cylindrical vortex swirling around the horizontal axis along the falling wall surface in the liquid of the extraction portion.

  Then, the flow of floating paint sludge that has been moved to the take-out part by the horizontal liquid flow is generated on the liquid level of the take-out part as the surface layer liquid is entrained (in other words, the flow that is generated on the liquid level of the take-out part by the horizontal cylindrical vortex flow) ), The floating paint sludge is drawn into the inflowing liquid from the falling wall surface together with the surface layer liquid of the take-out part while moving closer to the falling wall side. By assisting the entrainment of the paint sludge into the liquid in the form of pushing in, the suspended paint sludge is efficiently lowered into the liquid and drawn into the formation region of the lateral cylindrical vortex.

In addition, due to the presence of the liquid wall surface extending from the lower end of the falling wall surface to the liquid, compared to the case where the liquid wall surface is absent, the dispersion of the energy held by the inflowing liquid from the flowing liquid surface is more suppressed. A strong horizontal cylindrical vortex can be formed, and entrainment of floating paint sludge and bubbles in the liquid can be promoted.

  In other words, this enables the paint sludge to be efficiently taken out together with the accompanying liquid from the sludge take-out port facing the formation region of the horizontal cylindrical vortex flow, and the paint sludge separation and recovery that is equal to or higher than the conventional device described above Efficiency can be obtained.

  Further, according to the first characteristic configuration, even when a large amount of bubbles floating on the liquid surface exist together with the paint sludge, the floating paint sludge and the bubbles are entrained in the liquid by being put on the flow generated on the liquid surface of the take-out part. In addition, the floating paint sludge and foam are pushed in from the top by the falling liquid from the falling wall surface, and the floating paint sludge and foam are entrapped in the liquid to assist in entrainment. Not only can the suspended paint sludge and foam above the foam layer be efficiently lowered into the liquid and drawn into the lateral cylindrical vortex formation zone, which makes it possible to achieve high paint sludge even with large quantities of foam. Separation and recovery efficiency can be maintained, and it is also possible to effectively prevent the growth of the bubble layer from hindering the operation of the device and increasing the maintenance burden. Kill.

In the first characteristic configuration, if the falling wall surface is arranged in a state of facing the lateral liquid flow, the flow generated on the liquid surface of the extraction portion with the entrainment (the horizontal cylindrical vortex flow causes the extraction portion to The direction of the horizontal liquid flow that moves the floating paint sludge in the separation tank to the take-out part matches the direction of the flow generated on the liquid surface, and the floating paint sludge and bubbles in the take-out part are removed by the cooperation of these liquid flows. It is possible to move closer to the falling wall surface more efficiently.

And by this, it is possible to more efficiently perform the floating paint sludge and foam entrainment into the liquid as described above due to the liquid inflow from the falling wall surface, thereby separating and recovering the paint sludge, and Correspondence to a large amount of bubbles can be improved more effectively.

In addition, the first characteristic configuration does not deny the configuration in which both the front wall surface and the back wall surface of one wall are the falling wall surfaces. In the implementation of the first characteristic configuration, the front wall surface and the back surface of one wall are not used. You may make it form a horizontal cylindrical vortex | eddy_current with a swirl direction opposite to each other on the front wall surface side and a back wall surface side in a liquid by making both a wall surface into a falling wall surface.

[2] A second characteristic configuration of the present invention is that, in the implementation of the first characteristic configuration described above, the wall surface of the one end side tank wall of the separation tank is used as a falling wall surface.

That is, according to this second characteristic configuration, the paint sludge separation device can be compactly equipped at one end of the separation tank, the maintenance of the device can be facilitated, and the equipment in the tank can be easily equipped. Reduction of the tank effective capacity can also be effectively suppressed.

[ 3 ] The third characteristic configuration of the present invention is the above-described first or second characteristic configuration,
The in-liquid wall surface is a bent wall surface located closer to the formation region of the lateral cylindrical vortex flow toward the lower end side.

In other words, according to the third characteristic configuration, the formation of the horizontal cylindrical vortex flow by the liquid inflow from the falling wall surface is promoted by the guide by the liquid wall surface that is the bent wall surface that is closer to the formation region of the horizontal cylindrical vortex flow toward the lower end side. And can be stabilized.

  This makes it possible to more efficiently and stably entrain floating paint sludge and foam in the liquid, thereby improving the paint sludge separation and recovery efficiency and the ability to handle a large amount of foam. Furthermore, it can raise effectively.

[ 4 ] A fourth characteristic configuration of the present invention is the above first to third characteristic configuration ,
A liquid facing wall surface opposite to the liquid wall surface is provided in the take-out part, and a region between the liquid facing wall surface and the liquid wall surface is used as a formation region of the lateral cylindrical vortex.

In other words, according to the fourth feature configuration, a horizontal cylindrical vortex flow forming region is formed between the liquid wall surface and the liquid facing wall surface facing the liquid wall surface, and the formation region is formed by the liquid wall surface and the liquid facing wall surface. By enclosing it, it is possible to further stabilize the formation of the horizontal cylindrical vortex flow due to the inflow of liquid from the falling wall surface, and this stabilization makes it more efficient to entrain floating paint sludge and bubbles in the liquid. In addition, the coating sludge can be separated and recovered efficiently, and the response to a large amount of bubbles can be further effectively improved.

[ 5 ] The fifth characteristic configuration of the present invention is the above-described fourth characteristic configuration,
Forming an opening for settling between the wall surface in the liquid and the opposite wall surface in the liquid below the formation region of the horizontal cylindrical vortex flow;
The present invention is characterized in that the sedimentary paint sludge existing in the formation region of the horizontal cylindrical vortex is settled to the bottom of the separation tank through the settling opening.

In other words, according to the fifth feature configuration, the lateral wall vortex flow is surrounded by the liquid wall surface and the liquid facing wall surface while stabilizing the formation of the lateral tubular vortex flow, The sedimentary paint sludge existing in the cylindrical vortex flow formation zone can be allowed to settle from the horizontal cylindrical vortex flow formation zone to the bottom of the separation tank through the sedimentation opening, thereby forming the horizontal cylindrical vortex flow formation zone (that is, in the liquid It is possible to prevent the sedimentation of the sedimentary paint sludge from occurring in the wall area and the surrounding wall surface in the liquid.

  That is, the removal of the sedimented paint sludge can be completed by the operation on the bottom of the separation tank, and the maintenance burden can be reduced in this respect.

[ 6 ] A sixth characteristic configuration of the present invention is the above first to fifth characteristic configuration,
A plurality of liquid supply nozzles that supply the flow-down liquid to the flow-down wall surface by jetting are juxtaposed in the lateral direction along the flow-down wall surface,
In the downflow wall surface, downflow guide ridges extending in the vertical direction are provided at locations corresponding to the intermediate positions of the liquid supply nozzles adjacent to each other when viewed from the wall surface.

That is, according to the sixth feature configuration, each of the flow-down liquid jetted and supplied from one liquid supply nozzle to the flow-down wall surface and the flow-down liquid jetted and supplied from the adjacent liquid supply nozzle to the flow-down wall surface are respectively provided. In the process of forming a film that spreads in the lateral direction along the flow on the falling wall surface, it is possible to prevent the liquids in the film forming process from overlapping each other at the boundary portion by the projecting guide protrusion. .

  That is, when liquids in the process of film formation overlap each other at the boundary part, the film thickness change due to the overlap spreads to the downstream side while spreading horizontally, and this causes the flow from the falling wall surface to the extraction part. Disturbance occurs in the film-like liquid flow to be generated, but as described above, the overlapping of the liquids is prevented by the ridges for the flow-down guide, so that a uniform film-like liquid flow can stably flow into the take-out portion from the flow-down wall surface. Therefore, the formation of the horizontal cylindrical vortex can be more reliably stabilized.

  In other words, this makes it possible to more efficiently and stably entrain floating paint sludge and foam in the liquid, further improving the efficiency of separating and recovering paint sludge and the ability to handle a large amount of foam. Can be enhanced.

  In FIG. 1, reference numeral 1 denotes a painting booth, and this painting booth 1 is equipped with a purification device 4 for purifying the paint mist-containing air A discharged downward from the painting work area 2 through the lattice floor 3 with the washing water W. It is.

  This purification device 4 causes the wash water W in the wash water flow pan 5 disposed below the lattice floor 3 and the exhaust air A from the painting work area 2 to pass at high speed through the throttle air passage 6 in a merged state. In the process, the exhaust air A is purified by capturing the paint mist in the exhaust air A in the scattered water droplets of the cleaning water W.

  The purified exhaust air A is discharged to the outside through the exhaust duct 8 by the exhaust fan 7, while the wash water W that has captured the paint mist is received by the water tank 9 and then sent to the separation tank 11 through the delivery path 10.

  The separation tank 11 is a tank that agglomerates and separates the paint from the washing water W (that is, the washing water containing the paint) after the paint mist is captured sent from the purification device 4 of the painting booth 1. As shown in FIG. 4, a washing water supply rod 12 extending in the tank width direction is provided at the upper part of the tank one end, and a washing water outlet 13 is provided at the lower part of the other end of the tank. The upper part is a take-out portion 14 for taking out the floating paint sludge S generated in the tank to the outside of the tank.

  In other words, in this separation tank 11, the cleaning water W that has been captured by the paint mist from the purification device 4 of the coating booth 1 through the delivery path 10 is received by the cleaning water supply rod 12 and then overflowed from the cleaning water supply rod 12. By supplying to the one end part of the tank in a state of being uniformly dispersed in the tank width direction, the tank cleaning liquid W is taken out from the cleaning water outlet 13 at the other end of the tank, A lateral water flow f1 from the section toward the other end of the tank is formed over substantially the entire width of the tank.

  Then, the paint contained in the washing water W after the paint mist is captured is floated in the tank with agglomeration to form a floating paint sludge S, and this floating paint sludge S is moved to the take-out portion 14 at the other end of the tank by the lateral water flow f1. As a result, the floating paint sludge S is continuously taken out from the tank together with a small amount of the washing water W in the tank as the accompanying water.

  In the cleaning water supply tank 12, necessary chemicals such as a flocculant are mixed into the cleaning water W after capturing the paint mist supplied to the separation tank 11.

  The washing water W taken out from the washing water outlet 13 at the bottom of the tank (that is, the washing water from which the paint content has been removed by the floating of the paint sludge S) is returned to the washing water flow down pan 5 through the return path 15 by the washing water pump P1. On the other hand, the paint sludge S taken out from the take-out section 14 is sent to the sludge recovery device 17 through the sludge passage 16 by the sludge pump P2 together with the accompanying cleaning water W.

  The sludge collecting device 17 is composed of a vertical tank 18 that efficiently floats and accumulates the paint sludge S sent along with the accompanying cleaning water W through the sludge path 16 onto the water surface, and the paint that floats and accumulates in the vertical tank 18. The sludge S is scraped off and taken out from the tank by the device 19, and the taken-out paint sludge S is collected in the collection container 21 through the dehydrator 20.

  Further, the cleaning water W after removal of the paint sludge discharged from the bottom outlet 18a and the water level adjusting overflow portion 18b in the vertical tank 18 is returned to the cleaning water supply tank 12 of the separation tank 11 through the return path 22, It returns to the tank one end part of the separation tank 11 in the merged state with the washing water W after the paint mist is captured sent from the purification device 4 of the painting booth 1.

  As shown in FIGS. 1 to 4, the other end side tank wall 23 of the separation tank 11 flows down toward the inner wall surface 23 a of the tank wall 23. A plurality of water supply nozzles 24 for jetting water Wa in an obliquely downward direction are arranged in the tank width direction, so that the wall surface 23a of the upper portion of the water surface is used as the flow wall surface of the water Wa to eject from the water supply nozzle 24. The water Wa is caused to flow into the extraction portion 14 of the separation tank 11 in the form of a film-like water flow fa that is transmitted to the wall surface 23a and flows down into a film shape.

  Then, the inflow of the film-like water flow fa from the falling wall surface 23a causes the surface cleaning water W in the extraction portion 14 to be entrained in the inflowing water Wa (film-like water flow fa) from the falling wall surface 23a, along the falling wall surface 23a. A horizontal cylindrical vortex flow fb swirling around the horizontal axis is formed in the washing water W of the extraction portion 14, and on the other hand, the sludge outlet 25 (that is, the paint sludge S 25 is extracted at the extraction portion 14. A plurality of inlets of the sludge passage 16 are arranged in the tank width direction in the vicinity of the falling wall surface 23a so that each of them faces the formation region of the horizontal cylindrical vortex flow fb.

  That is, in the separation tank 11, the floating paint sludge S moved to the take-out section 14 at the other end of the tank by the lateral flow f1 and the generated bubbles B in the separation tank 11 are formed on the surface layer as shown in FIGS. The floating paint sludge S and the bubbles B are taken out from the flow-down wall surface 23a together with the surface washing water W of the discharge portion 14 while being further moved toward the flow-down wall surface 23a by the flow f2 generated on the water surface of the extraction portion 14 with the entrainment of the wash water W. Involved in the inflowing water Wa (film-like water flow fa), and at that time, the floating paint sludge S and the bubbles B are pushed from above by the inflow water Wa from the falling wall surface 23a. As a result, the suspended paint sludge S and the bubbles B are efficiently lowered into the water and drawn into the formation area of the horizontal cylindrical vortex fb. The b paint sludge S and foam B from the sludge outlet 25 to face the formation zone along with associated cleaning water W are as efficiently retrieve the sludge passage 16.

  In addition, since the flow-down wall surface 23a of the tank wall 23 faces the lateral flow f1 in the separation tank 11, the horizontal flow f1 and the flow f2 generated on the water surface of the take-out portion 14 due to the entrainment of the surface washing water W are defined. The flow directions coincide with each other, and due to the coincidence of the flow directions, the floating paint sludge S and the bubbles B are efficiently moved toward the falling wall surface 23a.

  The flow wall 23a is provided with a ridge 26 for flow guide that extends in the vertical direction and is disposed at a position corresponding to the intermediate position of the water supply nozzles 24 adjacent to each other when viewed from the wall surface. In the film-forming process on the flow-down wall surface 23a, the flow-down water Wa spouted and supplied to the flow-down wall surface 23a and the flow-down water Wa spouted and supplied from the adjacent water supply nozzle 24 to the flow-down wall surface 23a are mutually connected. By preventing the overlapping at the boundary portion by the ridges 26, the film-like water flow fa flowing into the extraction portion 14 from the falling wall surface 23a is made uniform and stabilized.

  On the other hand, an inclined plate 27 extending obliquely downward from a predetermined depth position toward the inner side of the tank is provided on the inner wall surface 23b of the other end side tank wall 23 below the water surface, and reaches the inclined plate 27 from the water surface. The inner wall surface 23b of the tank and the upper surface 27a of the inclined plate 27 have a curved cross-sectional shape in the liquid wall surface 28 (that is, closer to the formation region of the horizontal cylindrical vortex fb toward the lower end side in the wash water W of the extraction portion 14). The bent water wall) extends in the wash water W downward from the lower end of the flow wall 23a in a state where it is continuous with the flow wall 23a over the entire width of the tank.

  In addition, the underwater vertical wall 29 forming the in-liquid facing wall surface 29a that is opposed to the in-liquid wall surface 28 is provided in the washing water W of the extraction portion 14, and the space between the in-liquid facing wall surface 29a and the in-liquid wall surface 28 is provided. It is set as the formation area of the horizontal cylindrical vortex fb.

  That is, by forming the formation region of the horizontal cylindrical vortex flow fb extending in the tank width direction with the liquid wall surface 28 and the liquid facing wall surface 29a, the bent wall shape of the liquid wall surface 28 causes the flow from the falling wall surface 23a. By guiding the inflowing water Wa (film-like water flow fa), the formation of one lateral tubular vortex fb by the inflow of the film-like water flow fa from the falling wall surface 23a is further stabilized.

  Below the formation area of the horizontal cylindrical vortex fb, the space between the liquid wall surface 28 and the liquid facing wall surface 29a (that is, between the tip of the inclined plate 27 and the lower end of the underwater vertical wall 29) extends in the tank width direction. The extending slit-shaped settling opening 30 is provided, and the settling paint sludge S ′ out of the paint sludge existing in the formation region of the horizontal cylindrical vortex fb settles to the bottom of the separation tank 11 through the settling opening 30. I am trying to make it.

In the present embodiment , a part of the cleaning water W in the return passage 15 (that is, the cleaning water from which the paint component has been removed in the separation tank 11) is diverted, and the diverted cleaning water is used as the flow-down water Wa. In some cases, a part of the cleaning water W in the sludge passage 16 (that is, the cleaning water including the paint sludge S) is diverted, and the diverted cleaning water is supplied. The water supply nozzle 24 may be supplied as the water for flowing down Wa, or fresh water may be supplied to the water supply nozzle 24 as the water for flowing down Wa.

  Alternatively, the diverted wash water from the return path 15, the diverted wash water from the sludge path 16, fresh water, and the like may be mixed and supplied to the water supply nozzle 24 as the downflow water Wa.

[Another embodiment]
Next, other embodiments of the present invention will be listed.
Although the example which isolate | separated the coating material sludge S from the water W was shown in the said embodiment, not only this but this invention is applicable also to the coating material sludge isolation | separation from liquids other than water.

In the said embodiment, although the wall surface 23a in the water surface upper part of the tank wall 23 of the separation tank 11 was shown as the falling wall surface, it replaced with this and the wall surface of the vertical wall provided in the tank or the inclined wall was made into the falling wall surface. You may employ | adopt the structure to do.

In the embodiment, the example in which the falling wall surface 23a is opposed to the lateral liquid flow f1 that moves the floating paint sludge S to the take-out part 14 is shown, but depending on the case, the floating paint sludge S is moved to the take-out part 14 The falling wall surface 23a may be arranged in a posture inclined in a plan view with respect to the flow direction of the lateral liquid flow f1 to be performed.

Specific structure of a stream of walls 23a, and the structure for supplying a stream of a liquid Wa against falling wall 23a is of configuration changes can be made without being limited to a structure shown in the embodiment, for example, flows down wall Instead of replacing the surface 23a with a vertical posture, the surface 23a may be inclined in a side view, or instead of supplying the flow-down liquid Wa to the flow-down wall 23a by jetting of the liquid from the nozzle 24, the flow-down wall 23a may be overflowed by an overflow from a spear It is also possible to supply the liquid Wa for flowing down.

When the liquid wall surface 28 extending downward in the liquid in a state of being connected to the flow-down wall surface 23a is provided, the specific shape / structure of the liquid wall surface 28 is not limited to the shape / structure shown in the above embodiment, and various configuration changes are possible. In addition, when the liquid facing wall surface 29a that faces the liquid wall surface 28 is provided, the specific shape / structure of the liquid facing wall surface 29a is not limited to the shape / structure shown in the above embodiment, but various The configuration can be changed.

  The present invention is not limited to the cleaning liquid used for purifying exhaust gas from the painting equipment, and can be applied to the separation and recovery of paint sludge from liquids of any application as long as the liquid requires separation and recovery of the paint.

Equipment configuration diagram of painting equipment showing an embodiment Plan view of a separation tank showing an embodiment The side view and front view of the extraction part which show embodiment The perspective view of the extraction part which shows embodiment Plan view of extraction part showing a conventional example Side view of extraction part showing a conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Separation tank 14 Extraction part 23a Flowing wall surface 24 Liquid supply nozzle 25 Sludge outlet 26 Protrusion for flow guide 28 Liquid wall surface 29a Liquid facing wall 30 Settling opening f1 Horizontal liquid flow fa Film-like liquid flow fb Horizontal cylinder Swirl S Paint sludge S 'Settling paint sludge Wa Flowing liquid

Claims (6)

The floating paint sludge in the separation tank is moved to the take-out section by a horizontal liquid flow, and the moved floating paint sludge is lowered to the place where the sludge take-out port is disposed in the liquid of the take-out section by the take-out guide liquid flow. , A paint sludge separator for taking out paint sludge from the sludge outlet,
In a form in which the liquid is transmitted to the wall surface and flows down in the form of a film , the floating paint sludge together with the surface layer liquid of the extraction section has a falling wall surface that causes the film-like liquid flow to flow into the extraction portion as the extraction guide liquid flow. Arranged in a posture facing or inclined with respect to the lateral liquid flow so as to be caught in the inflowing liquid from the falling wall surface,
A liquid wall surface extending from the lower end portion of the flow wall surface into the liquid of the take-out portion in a state connected to the flow wall surface,
The paint sludge separation device, wherein the sludge outlet is made to face a formation area of a horizontal cylindrical vortex formed in the liquid of the take-out portion by the liquid inflow from the flow-down wall surface. The paint sludge separation device according to claim 1, wherein a wall surface of the tank wall on one end side of the separation tank is used as the falling wall surface. The paint sludge separation device according to claim 1 or 2 , wherein the wall surface in the liquid is a bent wall surface located closer to a formation region of the horizontal cylindrical vortex toward the lower end side. The in-liquid facing wall surface that opposes the in-liquid wall surface is provided in the take-out part, and a space between the facing wall surface in the liquid and the in-liquid wall surface is used as a formation region of the lateral cylindrical vortex flow . The paint sludge separator according to any one of the preceding claims. Forming an opening for settling between the wall surface in the liquid and the opposite wall surface in the liquid below the formation region of the horizontal cylindrical vortex flow;
The paint sludge separator according to claim 4 , wherein the paint sludge having a sedimentation property existing in the horizontal cylindrical vortex forming region is allowed to settle to the bottom of the separation tank through the settling opening. A plurality of liquid supply nozzles that supply the flow-down liquid to the flow-down wall surface by jetting are juxtaposed in the lateral direction along the flow-down wall surface,
In the flow down the wall, at a location corresponding to the intermediate position of the liquid supply nozzle adjacent its wall facing view, in any one of claims 1 to 5 is provided with projections for flow down guide extending in the longitudinal direction The paint sludge separator described.

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