WO2018173722A1 - Treatment device for circulating water in wet type coating booth - Google Patents
Treatment device for circulating water in wet type coating booth Download PDFInfo
- Publication number
- WO2018173722A1 WO2018173722A1 PCT/JP2018/008350 JP2018008350W WO2018173722A1 WO 2018173722 A1 WO2018173722 A1 WO 2018173722A1 JP 2018008350 W JP2018008350 W JP 2018008350W WO 2018173722 A1 WO2018173722 A1 WO 2018173722A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- sludge
- reaction tank
- pit
- circulating water
- Prior art date
Links
Images
Definitions
- the present invention relates to a wet paint booth circulating water treatment apparatus for separating paint sludge from wet paint booth circulating water containing solvent-based paint.
- Spray painting is performed in the painting process of automobiles, electrical equipment, metal products, etc., and a large amount of overspray paint (excess paint) that does not adhere to the object is generated.
- the amount of generation reaches about 50% to 60% of the paint used except for electrostatic coating with high coating efficiency. Therefore, it is necessary to remove and recover excess paint from the environment of the painting process.
- a wet painting booth by washing with water is usually employed, and the washing water is circulated. At that time, in order to prevent the paint from remaining and accumulating in the circulating water, the surplus paint in the circulating water is agglomerated and separated.
- Solvent-based paints are superior to water-based paints in terms of weather resistance, chipping resistance, and the like, and are often used particularly in clear clear coatings for automobiles. Solvent-based paints are highly sticky to the particles of surplus paint taken into the circulating water, so that they tend to adhere to various facilities and cause severe stains, or agglomerate into large clumps and become clogged.
- a tackifier is added to the drainage of a wet paint booth (water curtain type) pit, and a partition is provided at the bottom and top of the pit so that the floating sludge and sediment of the tack-free paint
- a facility is described in which sludge is continuously sucked together with circulating water, solid-liquid separation is performed with a filter, solid content is recovered, and treated water is returned to the pit.
- Patent Document 1 has the following problems. (1) As described above, sedimentation of settled sludge is unavoidable, and regular drainage cleaning is necessary for stable operation of the booth. (2) In the drainage cleaning of the precipitated sludge, the precipitated sludge is often sucked with a vacuum, and in this case, the moisture content of the sludge is high and the amount of waste is enormous. (3) Precipitation sludge suction can remove only sediment deposition sludge in the immediate vicinity of the suction mouth when the suction mouth is at a fixed position, and stably removes sediment deposition to such an extent that there will be no problem with booth operation for a long time. It cannot be done and drainage cleaning is necessary. (4) Accumulated sludge is often sludge-like, and it is very difficult to suck this together with water and separate it into solid and liquid using a filter because clogging prevents sufficient filtration speed. It is.
- the present invention provides a wet paint booth circulating water treatment device capable of sucking paint sludge with a device that can move the suction port, removing sediment sludge from the pit, and making periodic cleaning of the pit unnecessary.
- the purpose is to provide.
- the wet paint booth circulating water treatment apparatus of the present invention has a pit for receiving the wet paint booth circulating water and a suction means for sucking and collecting the accumulated paint sludge, which has a suction port movable in the water in the pit.
- a reaction tank into which the water sucked by the suction means and paint sludge are introduced, a means to be introduced into the reaction tank or to add a chemical to the introduced water, and the reaction tank.
- An agitation means a levitating separation apparatus in which reaction water is introduced from the reaction tank and levitated and separated into sludge and treated water; a return means for returning treated water from the levitating separation apparatus to the pit; Discharging means for discharging sludge from the floating separator.
- the stirring means is a pump that sucks air in the vicinity of the water level in the reaction tank and discharges the air into the reaction tank.
- the drug is at least one or both of a polymer flocculant and a tackifier.
- a turbidity sensor that detects turbidity of water is provided in at least one of the suction unit, the reaction tank, and a path from the suction unit to the reaction tank.
- Control means for controlling at least one of the position of the suction port and the addition amount of the medicine according to the detected value is provided.
- the paint sludge accumulated in the pits is sucked by the suction means and subjected to the floating separation process.
- periodic cleaning of pits can be eliminated.
- the water content of recovered sludge can be reduced, and the amount of waste can be reduced.
- Return water (paint-containing water) from the wet coating booth is introduced to one end side of the pit 2 through the pipe 1.
- a pipe 10 for taking out water is provided on the other end side of the pit 2.
- the inside of the pit 2 is divided into four zones 2a, 2b, 2c, and 2d by standing walls 3 and 4 that rise from the bottom surface, and a hanging wall 5 that is provided in a vertical direction so as to be submerged from above the water surface to below the water surface.
- the upright walls 3 and 4 and the hanging wall 5 are provided in parallel to each other. These directions are perpendicular to the direction connecting the one end and the other end (left end and right end in the figure) of the pit 2.
- the hanging wall 5 is located approximately in the middle of the standing walls 3 and 4.
- Float pumps 7 and 8 are arranged in zones 2b and 2c, respectively.
- the float pump 7 is preferably located in the zone 2b, but the float pump 8 may be located in the zone 2d.
- the paint detackifying agent can be added to the zone 2 a of the pit 2 by the addition device 9.
- the suction pipe 15 is inserted from above the water surface to near the bottom so as to suck the sludge S accumulated at the bottom of the pit 2.
- the tip of the suction tube 15 is a suction port 15a.
- a pipe 19 for supplying backwash water or backwash air is connected to the upper portion of the suction pipe 15.
- the pipe 19 is provided with a valve 19a.
- the upper end of the suction pipe 15 is connected to a suction pump 17 via a valve 16.
- the discharge water from the discharge port of the suction pump 17 is sent to the first tank 21 of the reaction tank 20 through the transparent tube 18.
- the reaction tank 20 is partitioned into a first tank 21 and a second tank 22 by a partition wall (overflow wall) 23.
- submersible pumps 24 and 25 are respectively installed in a suspended manner.
- the suction port of the submersible pump 24 is in the vicinity of the water level of the first tank 21, and when the submersible pump 24 is operated, only air or air and water in the first tank 21 are sucked. Yes.
- the discharge port of the submersible pump 24 faces downward, and the entrained air is discharged downward in the first tank 21.
- a pipe 28 is connected to the discharge port of the submersible pump 25 so that water can be fed to the floating separator 30.
- the floating separator 30 is divided into a separation chamber 35, an advection chamber 36, and an overflow chamber 37 by a tank 31 and partition walls 32 and 33 provided in the tank 31.
- An advection port 34 is provided at the lower end of the partition wall 32.
- An outlet 38 is provided in the lower part of the overflow chamber.
- a scraper 40 is provided so as to scrape the sludge floating in the separation chamber 35.
- the scraper 40 has a finned belt 44 that is wound around rollers 41, 42, and 43 so as to be endlessly rotatable.
- the scraped sludge is scraped up along the guide slope 45 and discharged to the collection tank 50. It is configured.
- the water permeable plate 51 is horizontally installed in the lower part in the collection tank 50, and the bag-like flexible container 52 is arranged in the upper open state above the water permeable plate 51.
- the paint booth return water from the pipe 1 flows into the pit 2, the non-adhesive agent is added, some sludge is precipitated, and some sludge is Surface.
- the sludge that has floated is sent to the separation chamber 35 of the floating separation device 30 by the float pumps 7 and 8.
- the water that has been purified by separation of sludge by sedimentation and flotation is sent to the painting booth via the pipe 10, the pump 11, and the pipe 12.
- the sludge precipitated in the pit 2 is sucked by the suction pipe 15 and introduced from the transparent tube 18 to the first tank 21 of the reaction tank 20.
- An aqueous solution of a cationic polymer or an anionic polymer is added as a polymer flocculant from the tank 26 or 27 to the first tank 21 (which may be the tube 18) by the pumps 26a and 27a.
- operation of the pump 24 it mixes with air and water, and an aggregation process and a bubble adhesion process are performed.
- the agglomerated sludge to which bubbles are attached overflows the partition wall 23 together with the water in the first tank 21, flows into the second tank 22, and is supplied to the separation chamber 35 of the levitation separator 30 through the pump 25 and the pipe 28. Is done.
- the sludge that has floated in the separation chamber 35 is scraped off by the scraper 40 and dropped into the flexible container 52.
- the water from which the sludge has been separated flows into the advection chamber 36 from the advection port 34, overflows the partition wall (overflow wall) 33, and returns to the pit 2 from the overflow chamber 37 and the outflow port 38 via the pipe 39. .
- the water (separated water) that has permeated through the flexible container 52 and the water permeable plate 51 is returned to the pit 2 through the outlet 53 and the pipe 54.
- the inside of the transparent tube 18 is seen through to determine whether sludge is mixed.
- the suction port 15a of the suction pipe 15 is positioned at the same location, and suction is continued. If the sludge is not mixed in the water flowing through the transparent tube 18, the suction port 15a of the suction pipe 15 is moved to another position, and the sludge accumulated at that position is sucked. If necessary, the valve 16 is closed, the valve 19a is opened, and the inside of the suction pipe 15 is back-washed with water or air.
- a sensor for measuring the turbidity of water is installed in the transparent tube 18 or the reaction tank 20 through which the mixture of sludge and water sucked from the pit 2 passes, and the position of the suction port 15a or You may make it control the addition amount of a polymer.
- various pumps such as a vacuum pump, a diaphragm pump, a winged submersible pump, a land-mounted winged pump, and a Mono pump can be used.
- the levitation separator 30 can employ a method of discharging levitation sludge with a scraper, or a method of discharging levitation sludge with overflow.
- the piping 39 for returning the treated water to the pit may be a natural flow type, but a vacuum pump, a diaphragm pump, a submerged pump with wings, a pump with wings on land, a Mono pump, or the like may be used.
- the container that receives the sludge is not limited to the flexible container, and a container or a net having a hole through which the separated water can flow out may be used.
- an antifoaming agent in addition to the polymer flocculant and the non-adhesive agent, an antifoaming agent, a deodorizing agent, or the like may be used.
- the mixture of the circulating water pit deposit and the circulating water was sucked by the vacuum pump 17 through the suction pipe 15 made of aluminum pipe having a length of 2 m and a diameter of 40 mm, with a strainer attached to the suction port 15a.
- the amount of polymer added was changed (the amount of polymer added decreased as the turbidity decreased).
- an anionic polymer Chrystak B-342 and a cationic polymer, Crifix EC-482, were added as a polymer flocculant and stirred with an underwater pump 24. At this time, only air was sucked into the submersible pump 24 to become agglomerated sludge containing air, which floated and overflowed into the second tank 22.
- Water and agglomerated sludge were sent to the floating separator 30 by the pump 25 of the second tank 22, where the sludge was separated, and the sludge removed from the water surface was collected in a flexible container.
- the system was operated for 30 hours, and 3564 kg (891 kg / flexible container ⁇ 4 bags, moisture content 73%) was collected as the sedimentation sludge.
- the solid content (dry amount) was 962 kg.
- the moisture content of the sludge (sludge) when the accumulated sludge is sucked and removed with a vacuum car is 90%.
- the amount of waste is 9620 kg, almost three times that of this time.
Abstract
A treatment device for circulating water in a wet type coating booth is provided with: a pit for receiving the circulating water for the wet type coating booth; a suction means, provided with a suction opening movable in the water within the pit, for suction and recovery of coating sludge; a reaction tank into which the water sucked by the suction means is introduced; a means for adding a chemical agent to the water that is to be introduced or has been introduced into the reaction tank; a stirring means provided in the reaction tank; a surface separation device into which the reaction water is introduced from the reaction tank and that is for surface separating the reaction water into sludge and treated water; a return means for returning the treated water from the surface separation device to the circulating water pit; and a discharge means for discharging the sludge from the surface separation device.
Description
本発明は、溶剤系塗料を含む湿式塗装ブース循環水中から塗料スラッジを分離する湿式塗装ブース循環水の処理装置に関する。
The present invention relates to a wet paint booth circulating water treatment apparatus for separating paint sludge from wet paint booth circulating water containing solvent-based paint.
自動車、電気機器、金属製品などの塗装工程ではスプレー塗装が行なわれており、被塗物に塗着しないオーバースプレーペイント（余剰塗料）が多量に発生する。その発生量は、塗着効率の高い静電塗装を除けば使用塗料の５０％から６０％程度にも達する。したがって、塗装工程の環境から余剰塗料を除去、回収する必要がある。余剰塗料の捕集には、通常、水洗による湿式塗装ブースが採用されており、水洗水は循環使用される。その際、循環水中に塗料が残留して蓄積することを防止するため、循環水中の余剰塗料を凝集分離することが行われている。
Spray painting is performed in the painting process of automobiles, electrical equipment, metal products, etc., and a large amount of overspray paint (excess paint) that does not adhere to the object is generated. The amount of generation reaches about 50% to 60% of the paint used except for electrostatic coating with high coating efficiency. Therefore, it is necessary to remove and recover excess paint from the environment of the painting process. In order to collect surplus paint, a wet painting booth by washing with water is usually employed, and the washing water is circulated. At that time, in order to prevent the paint from remaining and accumulating in the circulating water, the surplus paint in the circulating water is agglomerated and separated.
塗料は大別して、溶剤としてシンナーなどの有機溶剤のみを用いた溶剤系塗料と、水を用いた水性塗料とがある。溶剤系塗料は、水性塗料に比べ、耐候性や耐チッピング性などに優れており、特に自動車用の上塗りクリアー塗装においては多く使われている。溶剤系塗料は、循環水中に取り込まれた余剰塗料の粒子の粘着性が高いため、諸設備に付着して激しい汚れを生じたり、凝集して大きな固まりになって目詰まりが生じやすい。
Paints are roughly classified into solvent-based paints using only organic solvents such as thinner and water-based paints using water. Solvent-based paints are superior to water-based paints in terms of weather resistance, chipping resistance, and the like, and are often used particularly in clear clear coatings for automobiles. Solvent-based paints are highly sticky to the particles of surplus paint taken into the circulating water, so that they tend to adhere to various facilities and cause severe stains, or agglomerate into large clumps and become clogged.
このため、溶剤系塗料を含む湿式塗装ブース循環水の凝集処理に際しては、溶剤系塗料を不粘着化することが重要となる。
For this reason, it is important to make the solvent-based paint non-tacky when the wet processing booth circulating water containing the solvent-based paint is agglomerated.
特開平１１－２９０８６４号公報には、湿式塗装ブース（ウォーターカーテン式）ピットの排水に不粘着化剤を添加し、ピットの底部と上部に仕切りを設け、不粘着化処理塗料の浮上スラッジと沈殿スラッジを循環水とともに連続して吸引し、フィルターで固液分離して固形分を回収し、処理水をピットに戻す設備が記載されている。
In Japanese Patent Application Laid-Open No. 11-290864, a tackifier is added to the drainage of a wet paint booth (water curtain type) pit, and a partition is provided at the bottom and top of the pit so that the floating sludge and sediment of the tack-free paint A facility is described in which sludge is continuously sucked together with circulating water, solid-liquid separation is performed with a filter, solid content is recovered, and treated water is returned to the pit.
特許文献１には、次の課題がある。
（１）前述のように沈殿スラッジの堆積は避けられず、ブースの安定運転のためには、定期的な水抜き清掃が必要である。
（２）沈殿スラッジの水抜き清掃においても沈殿スラッジはバキュームで吸引することが多く、この場合スラッジの含水率が高く、廃棄物量が膨大である。
（３）沈殿スラッジ吸引は、吸口が一定の位置にある場合、吸い口のごく近傍の沈殿堆積スラッジしか吸えず、長期間常にブースの運転に問題が起きない程度に沈殿堆積を安定して除去することができず、水抜き清掃が必要である。
（４）堆積スラッジはヘドロ状である場合も多く、これを連続的に水と一緒に吸引し、フィルターで固液分離するのは、目詰まりで濾過速度が十分に確保できず、非常に困難である。 Patent Document 1 has the following problems.
(1) As described above, sedimentation of settled sludge is unavoidable, and regular drainage cleaning is necessary for stable operation of the booth.
(2) In the drainage cleaning of the precipitated sludge, the precipitated sludge is often sucked with a vacuum, and in this case, the moisture content of the sludge is high and the amount of waste is enormous.
(3) Precipitation sludge suction can remove only sediment deposition sludge in the immediate vicinity of the suction mouth when the suction mouth is at a fixed position, and stably removes sediment deposition to such an extent that there will be no problem with booth operation for a long time. It cannot be done and drainage cleaning is necessary.
(4) Accumulated sludge is often sludge-like, and it is very difficult to suck this together with water and separate it into solid and liquid using a filter because clogging prevents sufficient filtration speed. It is.
（１）前述のように沈殿スラッジの堆積は避けられず、ブースの安定運転のためには、定期的な水抜き清掃が必要である。
（２）沈殿スラッジの水抜き清掃においても沈殿スラッジはバキュームで吸引することが多く、この場合スラッジの含水率が高く、廃棄物量が膨大である。
（３）沈殿スラッジ吸引は、吸口が一定の位置にある場合、吸い口のごく近傍の沈殿堆積スラッジしか吸えず、長期間常にブースの運転に問題が起きない程度に沈殿堆積を安定して除去することができず、水抜き清掃が必要である。
（４）堆積スラッジはヘドロ状である場合も多く、これを連続的に水と一緒に吸引し、フィルターで固液分離するのは、目詰まりで濾過速度が十分に確保できず、非常に困難である。 Patent Document 1 has the following problems.
(1) As described above, sedimentation of settled sludge is unavoidable, and regular drainage cleaning is necessary for stable operation of the booth.
(2) In the drainage cleaning of the precipitated sludge, the precipitated sludge is often sucked with a vacuum, and in this case, the moisture content of the sludge is high and the amount of waste is enormous.
(3) Precipitation sludge suction can remove only sediment deposition sludge in the immediate vicinity of the suction mouth when the suction mouth is at a fixed position, and stably removes sediment deposition to such an extent that there will be no problem with booth operation for a long time. It cannot be done and drainage cleaning is necessary.
(4) Accumulated sludge is often sludge-like, and it is very difficult to suck this together with water and separate it into solid and liquid using a filter because clogging prevents sufficient filtration speed. It is.
本発明は、塗料スラッジを、吸口の位置が可動できる装置にて吸引し、ピットの沈殿スラッジを除去し、ピットの定期的な清掃を不要にすることができる湿式塗装ブース循環水の処理装置を提供することを目的とする。
The present invention provides a wet paint booth circulating water treatment device capable of sucking paint sludge with a device that can move the suction port, removing sediment sludge from the pit, and making periodic cleaning of the pit unnecessary. The purpose is to provide.
本発明の湿式塗装ブース循環水の処理装置は、湿式塗装ブース循環水を受け入れるピットと、該ピット内の水中を移動可能な吸引口を備えた、堆積した塗料スラッジを吸引回収するための吸引手段と、該吸引手段で吸引された水及び塗料スラッジが導入される反応槽と、該反応槽内に導入される、又は導入された水に薬剤を添加する手段と、該反応槽に設けられた撹拌手段と、反応槽から反応水が導入され、スラッジと処理水とに浮上分離する浮上分離装置と、該浮上分離装置からの処理水を前記ピットに戻す返送手段と、
該浮上分離装置からスラッジを排出する排出手段とを備える。 The wet paint booth circulating water treatment apparatus of the present invention has a pit for receiving the wet paint booth circulating water and a suction means for sucking and collecting the accumulated paint sludge, which has a suction port movable in the water in the pit. A reaction tank into which the water sucked by the suction means and paint sludge are introduced, a means to be introduced into the reaction tank or to add a chemical to the introduced water, and the reaction tank. An agitation means, a levitating separation apparatus in which reaction water is introduced from the reaction tank and levitated and separated into sludge and treated water; a return means for returning treated water from the levitating separation apparatus to the pit;
Discharging means for discharging sludge from the floating separator.
該浮上分離装置からスラッジを排出する排出手段とを備える。 The wet paint booth circulating water treatment apparatus of the present invention has a pit for receiving the wet paint booth circulating water and a suction means for sucking and collecting the accumulated paint sludge, which has a suction port movable in the water in the pit. A reaction tank into which the water sucked by the suction means and paint sludge are introduced, a means to be introduced into the reaction tank or to add a chemical to the introduced water, and the reaction tank. An agitation means, a levitating separation apparatus in which reaction water is introduced from the reaction tank and levitated and separated into sludge and treated water; a return means for returning treated water from the levitating separation apparatus to the pit;
Discharging means for discharging sludge from the floating separator.
本発明の一態様では、前記撹拌手段は、反応槽内の水面位付近の空気を吸い込み、該反応槽内に空気を吐出するポンプである。
In one aspect of the present invention, the stirring means is a pump that sucks air in the vicinity of the water level in the reaction tank and discharges the air into the reaction tank.
本発明の一態様では、前記薬剤は、少なくとも高分子凝集剤及び不粘着化剤の一方又は双方である。
In one embodiment of the present invention, the drug is at least one or both of a polymer flocculant and a tackifier.
本発明の一態様では、前記吸引手段、前記反応槽、及び該吸引手段から該反応槽に至る経路の少なくともいずれかにおいて、水の濁りを検知する濁りセンサが設けられているとともに、該濁りセンサの検出値によって前記吸引口の位置、及び前記薬剤の添加量の少なくとも一方を制御する制御手段が設けられている。
In one aspect of the present invention, a turbidity sensor that detects turbidity of water is provided in at least one of the suction unit, the reaction tank, and a path from the suction unit to the reaction tank. Control means for controlling at least one of the position of the suction port and the addition amount of the medicine according to the detected value is provided.
本発明装置では、ピット内に堆積した塗料スラッジを吸引手段にて吸引し、浮上分離処理する。本発明によると、ピットの定期的な清掃を不要にすることができる。本発明の一態様によると、適切な固液分離を行うことにより回収スラッジの含水率を低減し、廃棄物量を削減することができる。
In the device of the present invention, the paint sludge accumulated in the pits is sucked by the suction means and subjected to the floating separation process. According to the present invention, periodic cleaning of pits can be eliminated. According to one embodiment of the present invention, by performing appropriate solid-liquid separation, the water content of recovered sludge can be reduced, and the amount of waste can be reduced.
以下、図１を参照して実施の形態に係る湿式塗装ブース循環水の処理装置について説明する。湿式塗装ブースからの戻り水（塗料含有水）は、配管１を介してピット２の一端側に導入される。ピット２の他端側に水の取出用の配管１０が設けられている。
Hereinafter, a treatment apparatus for circulating water in a wet paint booth according to an embodiment will be described with reference to FIG. Return water (paint-containing water) from the wet coating booth is introduced to one end side of the pit 2 through the pipe 1. A pipe 10 for taking out water is provided on the other end side of the pit 2.
ピット２内は、底面から立ち上がる立壁３，４と、水面上方から水面下に没するように上下方向に設けられた垂下壁５とによって４個のゾーン２ａ，２ｂ，２ｃ，２ｄに分けられている。立壁３，４と垂下壁５は互いに平行方向に設けられている。これらの方向は、ピット２の前記一端と他端（図の左端と右端）を結ぶ方向と直交方向になっている。垂下壁５は立壁３，４の略中間の上方に位置している。
The inside of the pit 2 is divided into four zones 2a, 2b, 2c, and 2d by standing walls 3 and 4 that rise from the bottom surface, and a hanging wall 5 that is provided in a vertical direction so as to be submerged from above the water surface to below the water surface. Yes. The upright walls 3 and 4 and the hanging wall 5 are provided in parallel to each other. These directions are perpendicular to the direction connecting the one end and the other end (left end and right end in the figure) of the pit 2. The hanging wall 5 is located approximately in the middle of the standing walls 3 and 4.
ゾーン２ｂ，２ｃにそれぞれフロートポンプ７，８が配置されている。フロートポンプ７はゾーン２ｂに位置することが好ましいが、フロートポンプ８はゾーン２ｄに位置してもよい。
Float pumps 7 and 8 are arranged in zones 2b and 2c, respectively. The float pump 7 is preferably located in the zone 2b, but the float pump 8 may be located in the zone 2d.
ピット２のゾーン２ａには塗料不粘着化剤が添加装置９によって添加可能とされている。
The paint detackifying agent can be added to the zone 2 a of the pit 2 by the addition device 9.
ピット２の底部に堆積したスラッジＳを吸引するように、吸引管１５が水面上方から底面付近にまで差し込まれている。吸引管１５の先端が吸引口１５ａとなっている。なお、吸引管１５の上部には、逆洗水又は逆洗エアーを供給するための配管１９が接続されている。該配管１９にバルブ１９ａが設けられている。吸引管１５の上端は、バルブ１６を介して吸引ポンプ１７に接続されている。
The suction pipe 15 is inserted from above the water surface to near the bottom so as to suck the sludge S accumulated at the bottom of the pit 2. The tip of the suction tube 15 is a suction port 15a. A pipe 19 for supplying backwash water or backwash air is connected to the upper portion of the suction pipe 15. The pipe 19 is provided with a valve 19a. The upper end of the suction pipe 15 is connected to a suction pump 17 via a valve 16.
吸引ポンプ１７の吐出口からの吐出水は、透明チューブ１８を介して反応槽２０の第１槽２１に送水される。反応槽２０内は、仕切壁（溢流壁）２３によって第１槽２１と第２槽２２とに区画されている。第１槽２１及び第２槽２２内にそれぞれ逆さ宙吊り状に水中ポンプ２４，２５が設置されている。水中ポンプ２４の吸込口は、第１槽２１の水面位付近となっており、該水中ポンプ２４が作動すると、空気のみ、又は空気と第１槽２１内の水とが吸い込まれるようになっている。水中ポンプ２４の吐出口は下向きとなっており、この巻き込まれた空気が第１槽２１内の下方に向かって吐出される。
The discharge water from the discharge port of the suction pump 17 is sent to the first tank 21 of the reaction tank 20 through the transparent tube 18. The reaction tank 20 is partitioned into a first tank 21 and a second tank 22 by a partition wall (overflow wall) 23. In the first tank 21 and the second tank 22, submersible pumps 24 and 25 are respectively installed in a suspended manner. The suction port of the submersible pump 24 is in the vicinity of the water level of the first tank 21, and when the submersible pump 24 is operated, only air or air and water in the first tank 21 are sucked. Yes. The discharge port of the submersible pump 24 faces downward, and the entrained air is discharged downward in the first tank 21.
水中ポンプ２５の吐出口には配管２８が接続されており、浮上分離装置３０へ送水可能となっている。
A pipe 28 is connected to the discharge port of the submersible pump 25 so that water can be fed to the floating separator 30.
浮上分離装置３０は、槽３１と、槽３１内に設けられた仕切壁３２，３３によって分離室３５と、移流室３６と、溢流室３７とに区画されている。仕切壁３２の下端に移流口３４が設けられている。溢流室の下部に流出口３８が設けられている。
The floating separator 30 is divided into a separation chamber 35, an advection chamber 36, and an overflow chamber 37 by a tank 31 and partition walls 32 and 33 provided in the tank 31. An advection port 34 is provided at the lower end of the partition wall 32. An outlet 38 is provided in the lower part of the overflow chamber.
分離室３５内で浮上したスラッジを掻き出すようにスクレーパ４０が設けられている。このスクレーパ４０は、ローラ４１，４２，４３に無端回動可能に掛け回されたフィン付きベルト４４を有しており、浮上スラッジをガイドスロープ４５に沿って掻き上げて回収槽５０へ排出するように構成されている。
A scraper 40 is provided so as to scrape the sludge floating in the separation chamber 35. The scraper 40 has a finned belt 44 that is wound around rollers 41, 42, and 43 so as to be endlessly rotatable. The scraped sludge is scraped up along the guide slope 45 and discharged to the collection tank 50. It is configured.
回収槽５０内の下部に透水板５１が水平に設置され、該透水板５１の上側に袋状のフレキシブルコンテナ５２が上開状態にて配置されている。
The water permeable plate 51 is horizontally installed in the lower part in the collection tank 50, and the bag-like flexible container 52 is arranged in the upper open state above the water permeable plate 51.
この湿式塗装ブース循環水の処理装置にあっては、配管１からの塗装ブース戻り水がピット２に流入し、不粘着化剤が添加され、一部のスラッジは沈殿し、一部のスラッジは浮上する。浮上したスラッジは、フロートポンプ７，８によって浮上分離装置３０の分離室３５へ送られる。スラッジが沈殿及び浮上により分離されて清浄となった水は、配管１０、ポンプ１１及び配管１２を介して塗装ブースに送水される。
In this wet paint booth circulating water treatment device, the paint booth return water from the pipe 1 flows into the pit 2, the non-adhesive agent is added, some sludge is precipitated, and some sludge is Surface. The sludge that has floated is sent to the separation chamber 35 of the floating separation device 30 by the float pumps 7 and 8. The water that has been purified by separation of sludge by sedimentation and flotation is sent to the painting booth via the pipe 10, the pump 11, and the pipe 12.
ピット２内で沈殿したスラッジは、吸引管１５によって吸引され、透明チューブ１８から反応槽２０の第１槽２１へ導入される。この第１槽２１（チューブ１８でもよい。）に対し、タンク２６又は２７から高分子凝集剤としてカチオンポリマー又はアニオンポリマーの水溶液がポンプ２６ａ，２７ａによって添加される。そして、ポンプ２４の作動によって、空気及び水と混合され、凝集処理及び気泡付着処理が行われる。気泡が付着した凝集スラッジは、第１槽２１内の水と共に、仕切壁２３をオーバーフローして第２槽２２に流入し、ポンプ２５及び配管２８を介して浮上分離装置３０の分離室３５に送水される。
The sludge precipitated in the pit 2 is sucked by the suction pipe 15 and introduced from the transparent tube 18 to the first tank 21 of the reaction tank 20. An aqueous solution of a cationic polymer or an anionic polymer is added as a polymer flocculant from the tank 26 or 27 to the first tank 21 (which may be the tube 18) by the pumps 26a and 27a. And by the action | operation of the pump 24, it mixes with air and water, and an aggregation process and a bubble adhesion process are performed. The agglomerated sludge to which bubbles are attached overflows the partition wall 23 together with the water in the first tank 21, flows into the second tank 22, and is supplied to the separation chamber 35 of the levitation separator 30 through the pump 25 and the pipe 28. Is done.
分離室３５で浮上したスラッジは、スクレーパ４０によって掻き出され、フレキシブルコンテナ５２内に落とし込まれる。スラッジが分離された水は、移流口３４から移流室３６に流入し、仕切壁（溢流壁）３３をオーバーフローし、溢流室３７及び流出口３８から配管３９を介してピット２に戻される。フレキシブルコンテナ５２及び透水板５１を透水した水（分離水）は、流出口５３、配管５４を介してピット２に戻される。フレキシブルコンテナ５２内がスラッジで満杯になった場合には、新しいフレキシブルコンテナと交換する。
The sludge that has floated in the separation chamber 35 is scraped off by the scraper 40 and dropped into the flexible container 52. The water from which the sludge has been separated flows into the advection chamber 36 from the advection port 34, overflows the partition wall (overflow wall) 33, and returns to the pit 2 from the overflow chamber 37 and the outflow port 38 via the pipe 39. . The water (separated water) that has permeated through the flexible container 52 and the water permeable plate 51 is returned to the pit 2 through the outlet 53 and the pipe 54. When the inside of the flexible container 52 is filled with sludge, it is replaced with a new flexible container.
このようにして、湿式塗装ブース排水を効率よく処理することができる。
In this way, the wet paint booth drain can be treated efficiently.
なお、ピット２から吸引した水が透明チューブ１８を流れるときに、透明チューブ１８内を透視し、スラッジが混在しているか判断する。スラッジが混在しているときには、吸引管１５の吸引口１５ａを同一箇所に位置させておき、吸引を継続する。透明チューブ１８を流れる水にスラッジが混在しないようになったならば、吸引管１５の吸引口１５ａを別位置に移動させ、その位置に堆積したスラッジを吸引する。また、必要に応じ、バルブ１６を閉、バルブ１９ａを開とし、吸引管１５内を水又はエアーによって逆洗する。
When water sucked from the pit 2 flows through the transparent tube 18, the inside of the transparent tube 18 is seen through to determine whether sludge is mixed. When sludge is mixed, the suction port 15a of the suction pipe 15 is positioned at the same location, and suction is continued. If the sludge is not mixed in the water flowing through the transparent tube 18, the suction port 15a of the suction pipe 15 is moved to another position, and the sludge accumulated at that position is sucked. If necessary, the valve 16 is closed, the valve 19a is opened, and the inside of the suction pipe 15 is back-washed with water or air.
本発明では、ピット２から吸引したスラッジと水の混合物の通る透明チューブ１８または反応槽２０に水の濁りを測定するセンサーを設置し、このセンサーの検出値により吸引口１５ａの位置または、および、ポリマーの添加量を制御するようにしてもよい。
In the present invention, a sensor for measuring the turbidity of water is installed in the transparent tube 18 or the reaction tank 20 through which the mixture of sludge and water sucked from the pit 2 passes, and the position of the suction port 15a or You may make it control the addition amount of a polymer.
ポンプ１７としては、バキュームポンプ、ダイアフラムポンプ、羽付き水中ポンプ、陸上置き羽付きポンプ、モーノポンプなど各種のものを用いることができる。
As the pump 17, various pumps such as a vacuum pump, a diaphragm pump, a winged submersible pump, a land-mounted winged pump, and a Mono pump can be used.
浮上分離装置３０は、スクレーパーで浮上スラッジを排出する方式のほか、オーバーフローで浮上スラッジを排出するものなども採用することができる。
The levitation separator 30 can employ a method of discharging levitation sludge with a scraper, or a method of discharging levitation sludge with overflow.
処理水をピットに戻す配管３９は、自然流下式でもよいが、バキュームポンプ、ダイアフラムポンプ、羽付き水中ポンプ、陸上置き羽付きポンプ、モーノポンプなどを用いてもよい。
The piping 39 for returning the treated water to the pit may be a natural flow type, but a vacuum pump, a diaphragm pump, a submerged pump with wings, a pump with wings on land, a Mono pump, or the like may be used.
スラッジを受ける容器は、フレキシブルコンテナに限らず、分離水が流れ出ることができる穴がある容器や網などを用いてもよい。
The container that receives the sludge is not limited to the flexible container, and a container or a net having a hole through which the separated water can flow out may be used.
薬剤は、高分子凝集剤、不粘着剤のほか、消泡剤、消臭剤等を用いてもよい。
As the chemical, in addition to the polymer flocculant and the non-adhesive agent, an antifoaming agent, a deodorizing agent, or the like may be used.
図１に示す湿式塗装ブース循環水の処理装置によって、自動車部品工場の湿式塗装ブースにて、塗装稼働中（オンライン）に過去に沈殿堆積したスラッジ回収を行った。ブース稼働中であるので、常に余剰塗料が循環水に入ってきており、これらはピット２に添加している不粘着化剤により処理され、その大部分がピット２にて浮上した。沈殿堆積スラッジ吸引中は既存の浮上スラッジ回収システムも稼働中で、浮上分離装置では沈殿堆積スラッジと同時にピット２で浮上した処理スラッジの回収を並行して行った。
In the wet painting booth of an automobile parts factory, sludge collected and deposited in the past during the painting operation (online) was collected by the wet painting booth circulating water treatment device shown in FIG. Since the booth was in operation, surplus paint always entered the circulating water, and these were treated with the non-adhesive agent added to the pit 2, and most of them floated in the pit 2. While the sedimentation sludge was being sucked, the existing floating sludge recovery system was also in operation, and the levitating separator simultaneously recovered the treated sludge that floated in pit 2 simultaneously with the sedimentation sludge.
循環水ピット沈殿物と循環水の混合物を、吸引口１５ａにストレーナーを付けた、長さ２ｍ、直径４０ｍｍのアルミパイプ製吸引管１５を介してバキュームポンプ１７にて吸引した。バキュームポンプ１７出口からの透明チューブ（この実施例ではホース）１８を通して取水の濁りを確認し、濁りにあわせて取水位置変更（透明になったときには、スラッジが無くなったことを意味するので、吸引場所を変える）、ポリマー添加量の変更（濁度が下がるほどポリマー添加量減少）を行った。
The mixture of the circulating water pit deposit and the circulating water was sucked by the vacuum pump 17 through the suction pipe 15 made of aluminum pipe having a length of 2 m and a diameter of 40 mm, with a strainer attached to the suction port 15a. Check the turbidity of the water intake through the transparent tube (hose in this embodiment) 18 from the outlet of the vacuum pump 17 and change the water intake position according to the turbidity (when it becomes transparent, it means that the sludge has disappeared. The amount of polymer added was changed (the amount of polymer added decreased as the turbidity decreased).
反応槽２０の第１槽２１へは、高分子凝集剤としてアニオンポリマーであるクリスタックＢ－３４２と、カチオンポリマーであるクリフィックスＥＣ－４８２とを添加し、水中ポンプ２４で撹拌した。この際、水中ポンプ２４には空気のみ吸引され、空気を含む凝集スラッジとなり、浮上し、第２槽２２にオーバーフローした。
To the first tank 21 of the reaction tank 20, an anionic polymer, Chrystak B-342 and a cationic polymer, Crifix EC-482, were added as a polymer flocculant and stirred with an underwater pump 24. At this time, only air was sucked into the submersible pump 24 to become agglomerated sludge containing air, which floated and overflowed into the second tank 22.
第２槽２２のポンプ２５により、水と凝集スラッジが浮上分離装置３０に送水され、ここでスラッジが分離され、水面上から除去されたスラッジは、フレキシブルコンテナに回収した。
Water and agglomerated sludge were sent to the floating separator 30 by the pump 25 of the second tank 22, where the sludge was separated, and the sludge removed from the water surface was collected in a flexible container.
述べ３０ｈ稼働させ、沈殿堆積スラッジとしては３５６４ｋｇ（８９１ｋｇ／フレキシブルコンテナ×４袋。含水率７３％）を回収した。固形分（ドライ量）としては９６２ｋｇであった。なお、このピットでは、従来、堆積スラッジをバキュームカーで吸引、除去した場合のスラッジ（汚泥）の含水率は９０％であった。同じ量の固形分を除去したと仮定した場合、廃棄物量は９６２０ｋｇとなり、今回のほぼ３倍量となる。
The system was operated for 30 hours, and 3564 kg (891 kg / flexible container × 4 bags, moisture content 73%) was collected as the sedimentation sludge. The solid content (dry amount) was 962 kg. In this pit, the moisture content of the sludge (sludge) when the accumulated sludge is sucked and removed with a vacuum car is 90%. Assuming that the same amount of solids has been removed, the amount of waste is 9620 kg, almost three times that of this time.
従って、本発明装置によると、含水率の低いスラッジを効率よく回収できることが認められた。
Therefore, according to the apparatus of the present invention, it was confirmed that sludge having a low water content can be efficiently recovered.
本発明を特定の態様を用いて詳細に説明したが、本発明の意図と範囲を離れることなく様々な変更が可能であることは当業者に明らかである。
本出願は、２０１７年３月２１日付で出願された日本特許出願２０１７－０５４５２２に基づいており、その全体が引用により援用される。 Although the present invention has been described in detail using specific embodiments, it will be apparent to those skilled in the art that various modifications can be made without departing from the spirit and scope of the invention.
This application is based on Japanese Patent Application No. 2017-054522 filed on Mar. 21, 2017, which is incorporated by reference in its entirety.
本出願は、２０１７年３月２１日付で出願された日本特許出願２０１７－０５４５２２に基づいており、その全体が引用により援用される。 Although the present invention has been described in detail using specific embodiments, it will be apparent to those skilled in the art that various modifications can be made without departing from the spirit and scope of the invention.
This application is based on Japanese Patent Application No. 2017-054522 filed on Mar. 21, 2017, which is incorporated by reference in its entirety.
２ ピット
７，８ フロートポンプ
１５ 吸引管
２０ 反応槽
３０ 浮上分離槽
５０ 回収槽
５２ フレキシブルコンテナ 2 Pit 7, 8 Float pump 15 Suction tube 20 Reaction tank 30 Floating separation tank 50 Recovery tank 52 Flexible container
７，８ フロートポンプ
１５ 吸引管
２０ 反応槽
３０ 浮上分離槽
５０ 回収槽
５２ フレキシブルコンテナ 2
Claims (4)
- 湿式塗装ブース循環水を受け入れるピットと、
該ピット内の水中を移動可能な吸引口を備えた、堆積した塗料スラッジを吸引回収するための吸引手段と、
該吸引手段で吸引された水及び塗料スラッジが導入される反応槽と、
該反応槽内に導入される、又は導入された水に薬剤を添加する手段と、
該反応槽に設けられた撹拌手段と、
反応槽から反応水が導入され、スラッジと処理水とに浮上分離する浮上分離装置と、
該浮上分離装置からの処理水を前記ピットに戻す返送手段と、
該浮上分離装置からスラッジを排出する排出手段と
を備えた湿式塗装ブース循環水の処理装置。 Wet paint booth with pit to accept circulating water,
A suction means for sucking and collecting the accumulated paint sludge, comprising a suction port movable in the water in the pit;
A reaction tank into which water and paint sludge sucked by the suction means are introduced;
Means for adding a chemical to water introduced or introduced into the reaction vessel;
Stirring means provided in the reaction vessel;
A levitating separation device that introduces reaction water from the reaction tank and levitates and separates into sludge and treated water;
Return means for returning treated water from the levitation separator to the pit;
An apparatus for treating circulating water in a wet coating booth comprising discharge means for discharging sludge from the floating separator. - 請求項１において、前記撹拌手段は、反応槽内の水面位付近の空気を吹き込み、該反応槽内に空気を吐出するポンプであることを特徴とする湿式塗装ブース循環水の処理装置。 2. The wet paint booth circulating water treatment apparatus according to claim 1, wherein the stirring means is a pump that blows air near a water level in the reaction tank and discharges the air into the reaction tank.
- 請求項１又は２において、前記薬剤は、少なくとも高分子凝集剤及び不粘着化剤の一方又は双方であることを特徴とする湿式塗装ブース循環水の処理装置。 3. The wet paint booth circulating water treatment apparatus according to claim 1 or 2, wherein the chemical is at least one or both of a polymer flocculant and a non-adhesive agent.
- 請求項１～３のいずれか1項において、
前記吸引手段、前記反応槽、及び該吸引手段から該反応槽に至る経路の少なくともいずれかにおいて、水の濁りを検知する濁りセンサが設けられているとともに、
該濁りセンサの検出値によって前記吸引口の位置、及び前記薬剤の添加量の少なくとも一方を制御する制御手段が設けられている
ことを特徴とする湿式塗装ブース循環水の処理装置。 In any one of claims 1 to 3,
A turbidity sensor for detecting turbidity of water is provided in at least one of the suction means, the reaction tank, and the path from the suction means to the reaction tank,
A wet paint booth circulating water treatment apparatus, characterized in that a control means is provided for controlling at least one of the position of the suction port and the amount of the drug added according to the detection value of the turbidity sensor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-054522 | 2017-03-21 | ||
| JP2017054522A JP6384558B1 (en) | 2017-03-21 | 2017-03-21 | Wet paint booth circulating water treatment equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2018173722A1 true WO2018173722A1 (en) | 2018-09-27 |
Family
ID=63444212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2018/008350 WO2018173722A1 (en) | 2017-03-21 | 2018-03-05 | Treatment device for circulating water in wet type coating booth |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6384558B1 (en) |
| WO (1) | WO2018173722A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4931168U (en) * | 1972-06-17 | 1974-03-18 | ||
| JP2002355680A (en) * | 2001-05-30 | 2002-12-10 | Kurita Water Ind Ltd | Flocculant injection method and flocculant injection apparatus |
| JP2008173562A (en) * | 2007-01-18 | 2008-07-31 | Hakuto Co Ltd | Method of treating booth circulation water |
| JP2010115626A (en) * | 2008-11-14 | 2010-05-27 | Anest Iwata Corp | Recovery apparatus for sludge treatment in coating booth |
| JP2011251234A (en) * | 2010-06-01 | 2011-12-15 | Toyota Motor Corp | Paint wastewater separator |
| WO2013136429A1 (en) * | 2012-03-13 | 2013-09-19 | 株式会社パーカーコーポレーション | Coating material mist treatment agent for wet-coating-booth circulating water and device for recovering wet-coating-booth circulating water |
| JP2014155916A (en) * | 2013-02-18 | 2014-08-28 | Kurita Water Ind Ltd | Method of treating wet coating booth circulating water |
-
2017
- 2017-03-21 JP JP2017054522A patent/JP6384558B1/en active Active
-
2018
- 2018-03-05 WO PCT/JP2018/008350 patent/WO2018173722A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4931168U (en) * | 1972-06-17 | 1974-03-18 | ||
| JP2002355680A (en) * | 2001-05-30 | 2002-12-10 | Kurita Water Ind Ltd | Flocculant injection method and flocculant injection apparatus |
| JP2008173562A (en) * | 2007-01-18 | 2008-07-31 | Hakuto Co Ltd | Method of treating booth circulation water |
| JP2010115626A (en) * | 2008-11-14 | 2010-05-27 | Anest Iwata Corp | Recovery apparatus for sludge treatment in coating booth |
| JP2011251234A (en) * | 2010-06-01 | 2011-12-15 | Toyota Motor Corp | Paint wastewater separator |
| WO2013136429A1 (en) * | 2012-03-13 | 2013-09-19 | 株式会社パーカーコーポレーション | Coating material mist treatment agent for wet-coating-booth circulating water and device for recovering wet-coating-booth circulating water |
| JP2014155916A (en) * | 2013-02-18 | 2014-08-28 | Kurita Water Ind Ltd | Method of treating wet coating booth circulating water |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018153782A (en) | 2018-10-04 |
| JP6384558B1 (en) | 2018-09-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101635288B1 (en) | Coating material spray mist treatment method | |
| KR20170028039A (en) | Select operation possible type rise and precipitation integrated waste water treatment system | |
| US7799218B2 (en) | Paint reclamation clarifier system | |
| CN106045125B (en) | oil field comprehensive sewage treatment device | |
| CN204400653U (en) | A kind of integration air-float oil eliminator | |
| JP6384558B1 (en) | Wet paint booth circulating water treatment equipment | |
| GB2275210A (en) | Regenerating of degreasing liquid | |
| KR101169637B1 (en) | System for removing sludge of phosphated coating | |
| CN211521684U (en) | Device for treating sewage floating objects | |
| JP3919508B2 (en) | Liquid processing equipment | |
| JP2015027637A (en) | Device and method for separation removal of paint | |
| CN101128396B (en) | Floatation separator and floatation separation method | |
| JPH059109Y2 (en) | ||
| CN209423131U (en) | A kind of oily-water seperating equipment | |
| EP4043598A1 (en) | Method for post-washing ash | |
| JPS5829122B2 (en) | Wastewater treatment equipment | |
| CN218435328U (en) | Oil removing system for phenol-ammonia wastewater | |
| KR100501795B1 (en) | A dredging system and apparatus of accamulated sludge using pressure floataition method in water area such as the sea,lakes,and rivers | |
| JP2015144987A (en) | Pollutant float and separation system | |
| CN215855216U (en) | Scum degassing device for air floatation tank and air floatation tank | |
| JP6040267B2 (en) | Paint waste liquid separator | |
| CN109485197A (en) | A kind of Deep Processing Method of Waste Water from FGD | |
| WO1982002543A1 (en) | Method for reclaiming paint overspray | |
| JP2814417B2 (en) | Method and apparatus for sedimentation and separation of suspension | |
| CN113135623B (en) | Water treatment device and method for modifying advection sedimentation tank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18772656 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 18772656 Country of ref document: EP Kind code of ref document: A1 |