JPH06154730A - Purification treatment device for water to be treated of aqueous painting booth - Google Patents

Purification treatment device for water to be treated of aqueous painting booth

Info

Publication number
JPH06154730A
JPH06154730A JP4310442A JP31044292A JPH06154730A JP H06154730 A JPH06154730 A JP H06154730A JP 4310442 A JP4310442 A JP 4310442A JP 31044292 A JP31044292 A JP 31044292A JP H06154730 A JPH06154730 A JP H06154730A
Authority
JP
Japan
Prior art keywords
water
treated
tank
treated water
pressurized
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4310442A
Other languages
Japanese (ja)
Inventor
Mitsuo Nakajima
光夫 中島
Yukihisa Kobayashi
幸久 小林
Jun Saiki
潤 斉木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hakuto Co Ltd
Toyota Motor Corp
Original Assignee
Hakuto Co Ltd
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hakuto Co Ltd, Toyota Motor Corp filed Critical Hakuto Co Ltd
Priority to JP4310442A priority Critical patent/JPH06154730A/en
Publication of JPH06154730A publication Critical patent/JPH06154730A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To suppress the formation of settled floc in a main tank by effectively utilizing the chemical agent such as a flocculant contained in water to be treated. CONSTITUTION:The treated water in a flotation treatment tank 6 contains the chemical agent such as a flocculant added to a supply pipeline 5 for water to be treated and sent to a pressurized water tank 20 to which compressed air is supplied from an air compressor 19 by a treated water pump 18 to become air and chemical agent-containing pressure treated water. A part of the pressurized treated water is mixed with the water to be treated in the supply pipeline 5 and the remainder thereof is mixed with the water to be treated in the return passage 4 for water to be treated from a painting booth 3. When the pressurized treated water is mixed with the water to be treated returned from the painting booth 3, the paint in the water to be treated and the chemical agent contained in the pressurized treated water are certainly mixed by the action of air to form floc. When this floc formed water returns to the main tank 2, the floc well floats along with air bubbles.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、水性塗装ブースの被処
理水を浄化処理して、処理水を繰り返し使用し得るよう
にする水性塗装ブースの被処理水の浄化処理装置に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for purifying treated water in an aqueous coating booth, which purifies treated water in the aqueous coating booth so that the treated water can be repeatedly used.

【0002】[0002]

【従来の技術】従来より、図2に示すように、循環ポン
プ51によって主タンク52から水性塗装ブース53に
送られ、該塗装ブース53で塗料ミストを捕集して汚染
され、被処理水帰還路54を介して主タンク52に帰還
した被処理水を浄化する水性塗装ブース53の被処理水
の浄化処理装置が知られている。この浄化処理装置は、
主タンク52と被処理水供給管路55を介して接続さ
れ、被処理水を浮上処理する加圧浮上処理タンク56
と、被処理水供給管路55に設けられ、主タンク52内
の被処理水を加圧浮上処理タンク56に送り込む被処理
水ポンプ57と、被処理水ポンプ57の下流側の被処理
水供給管路55に設けられ、凝集剤等の薬品が添加され
る凝集タンク58と、加圧浮上処理タンク56で処理さ
れた処理水の一部を加圧水として加圧浮上処理タンク5
6に送り込む加圧水機構70とから主に構成されてい
る。なお、加圧水機構70は、加圧水ポンプ71と、加
圧タンク72と、エアコンプレッサ73とを具備してい
る。
2. Description of the Related Art Conventionally, as shown in FIG. 2, a circulating pump 51 sends a paint mist from a main tank 52 to a water-based coating booth 53, where the paint mist is collected and contaminated. There is known a treatment apparatus for purifying the water to be treated in the water-based coating booth 53, which purifies the water to be treated returned to the main tank 52 via the passage 54. This purification device
A pressurized flotation treatment tank 56, which is connected to the main tank 52 through a treated water supply pipeline 55 and floats the treated water.
And a treated water pump 57 that is provided in the treated water supply pipe line 55 and sends the treated water in the main tank 52 to the pressurized floating treatment tank 56, and a treated water supply downstream of the treated water pump 57. The flocculation tank 58 provided in the pipe line 55, to which a chemical such as a flocculant is added, and a part of the treated water treated in the pressurized flotation treatment tank 56 are treated as pressurized water.
It is mainly composed of a pressurized water mechanism 70 which is sent to the nozzle 6. The pressurized water mechanism 70 includes a pressurized water pump 71, a pressurized tank 72, and an air compressor 73.

【0003】上記浄化処理装置では、主タンク52内の
水量の1/10〜1/4程度が、被処理水ポンプ57で
被処理水供給管路55を介して加圧浮上処理タンク56
に送られる。被処理水供給管路55の途中に設けられた
凝集タンク58では、凝集剤、助剤、pH調整剤等の薬
剤が被処理水に添加、混合される。これにより、塗料が
凝集してフロックを形成する。なお。凝集剤としては、
硫酸バンド、ポリ塩化アルミニウム、塩化鉄等の無機系
凝集剤や、ポリエチレンイミン等のカチオン系高分子凝
集剤などが用いられる。助剤としては、ポリアクリル
酸、ポリアクリルアミド等のアニオン性高分子凝集剤な
どが用いられる。pH調整剤としては、苛性ソーダ、消
石灰、硫酸などが用いられる。
In the above-mentioned purification treatment apparatus, about 1/10 to 1/4 of the amount of water in the main tank 52 is pressurized floating treatment tank 56 in the treated water pump 57 via the treated water supply pipe 55.
Sent to. In the aggregating tank 58 provided in the water to be treated supply pipe 55, chemicals such as an aggregating agent, an auxiliary agent and a pH adjusting agent are added to and mixed with the water to be treated. As a result, the paint aggregates to form flocs. Incidentally. As a coagulant,
Inorganic flocculants such as sulfuric acid band, polyaluminum chloride and iron chloride, and cationic polymer flocculants such as polyethyleneimine are used. As the auxiliary agent, an anionic polymer flocculant such as polyacrylic acid or polyacrylamide is used. As the pH adjuster, caustic soda, slaked lime, sulfuric acid, etc. are used.

【0004】上記凝集タンク58で形成されたフロック
形成水は、該形成水に対して50%以下の割合の加圧水
と混合され、加圧浮上処理タンク56に導かれる。加圧
浮上処理タンク56では、加圧水中の含まれる微粒子の
気泡とともにフロックが短時間で浮上し、浮上したフロ
ックはスクレーパ59で掻き取られる。スクレーパ59
で掻き取られたフロックは回収タンク60に回収され、
一方清澄になった処理水は処理水タンク61に流入す
る。処理水タンク61からは、被処理水ポンプ57によ
って主タンク52から加圧浮上処理タンク56に送られ
た水量分の処理水が主タンク52に帰還され、ほぼ残り
の水量分の処理水が加圧水ポンプ71で加圧水タンク7
2に送られる。加圧水タンク72では、エアコンプレッ
サ73から圧縮エアが供給されるので、エアを含んだ加
圧水が加圧水タンク72から被処理水供給管路55内の
被処理水に混合される。なお、この時の加圧水の条件
は、圧力0.5〜5kgf/cm2 程度、好ましくは3
kgf/cm2程度とされる。また、処理水タンク中の
処理水の10〜30%程度は、溶解性有機物(COD)
対策の意味で、系外に排出される。またこの排出水量分
は、主タンク52内に工業用水が補給されるようになっ
ている。
The floc forming water formed in the flocculation tank 58 is mixed with pressurized water at a ratio of 50% or less with respect to the forming water, and is introduced into the pressure floating treatment tank 56. In the pressurized flotation treatment tank 56, the flocs float in a short time together with the bubbles of fine particles contained in the pressurized water, and the floated flocs are scraped off by the scraper 59. Scraper 59
The flocs scraped off with are collected in the collection tank 60,
On the other hand, the clarified treated water flows into the treated water tank 61. From the treated water tank 61, the treated water of the amount of water sent from the main tank 52 to the pressurized floating treatment tank 56 by the treated water pump 57 is returned to the main tank 52, and the treated water of almost the remaining amount is pressurized water. Pressurized water tank 7 with pump 71
Sent to 2. In the pressurized water tank 72, compressed air is supplied from the air compressor 73, so that the pressurized water containing air is mixed with the treated water in the treated water supply pipe 55 from the pressurized water tank 72. The condition of the pressurized water at this time is such that the pressure is about 0.5 to 5 kgf / cm 2 , preferably 3
It is set to about kgf / cm 2 . Moreover, about 10 to 30% of the treated water in the treated water tank is soluble organic matter (COD).
As a measure, it is discharged outside the system. In addition, industrial water is supplied to the main tank 52 by the amount of the discharged water.

【0005】[0005]

【発明が解決しようとする課題】上記したような従来の
浄化処理装置においては、加圧浮上処理タンク56で浄
化処理して得られた処理水を直接主タンク52内に帰還
させる構造である。ここで、加圧浮上処理タンク56で
処理された処理水中には、凝集タンク58で注入された
凝集剤等の薬剤が多少含有している。この凝集剤等の薬
剤を含有する処理水が、主タンク52内で、塗装ブース
53から被処理水帰還路54を介して帰還した被処理水
に混入されると、該被処理水中の塗料が上記薬剤により
凝集し、フロックを形成する。このため、主タンク52
内には、沈澱するフロックや浮上するフロックなどを生
じ、回収するのが困難となる。
In the conventional purification treatment apparatus as described above, the treatment water obtained by the purification treatment in the pressure floating treatment tank 56 is directly returned to the main tank 52. Here, the treated water treated in the pressure floating treatment tank 56 contains some chemicals such as a coagulant injected in the coagulation tank 58. When the treated water containing the agent such as the coagulant is mixed with the treated water returned from the coating booth 53 through the treated water return path 54 in the main tank 52, the paint in the treated water is removed. Aggregates with the above-mentioned agents to form flocs. Therefore, the main tank 52
Flocs that settle or float are generated inside, and it is difficult to collect them.

【0006】また、主タンク52内に攪拌器やエアポン
プ等を別途設けて、沈澱するフロック等を浮上させて回
収、除去することも可能であるが、これでは浄化処理装
置の高コスト化につながる。本発明は、上記実情に鑑み
てなされたものであり、上記処理水中に含有される凝集
剤等の薬剤を有効利用しつつ、主タンク内でフロックが
沈澱するのを抑制し、沈澱フロック等を回収するための
機器の削減により装置コストの低減を図ることる目的と
するものである。
It is also possible to separately provide a stirrer, an air pump, etc. in the main tank 52 to float and collect and remove the flocs that settle, but this leads to an increase in the cost of the purification treatment apparatus. . The present invention has been made in view of the above circumstances, and while effectively utilizing a chemical agent such as a coagulant contained in the treated water, it is possible to suppress the flocs from precipitating in the main tank, The purpose is to reduce the device cost by reducing the number of devices for collection.

【0007】[0007]

【課題を解決するための手段】上記課題を解決する本発
明は、水性塗装ブースで汚染され該塗装ブースから被処
理水帰還路を介して主タンクに帰還した被処理水を浄化
する浄化処理装置であって、前記主タンクと被処理水供
給管路を介して接続され、前記被処理水を浮上処理する
浮上処理タンクと、前記被処理水供給管路に設けられ、
前記主タンク内の被処理水を前記浮上処理タンクに送り
込む被処理水ポンプと、前記浮上処理タンクと接続管路
を介して接続された加圧水タンクと、該加圧水タンクに
圧縮エアを供給するエアコンプレッサと、前記接続管路
に設けられ、前記浮上処理タンクで処理された処理水を
加圧水タンクに送り込む処理水ポンプとを具備し、前記
加圧水タンク内のエアを含有する加圧処理水の一部を前
記被処理水供給管路内の被処理水に混合させ、かつ、該
加圧処理水の残部を前記被処理水帰還路内の被処理水に
混合させるように配管したことを特徴とするものであ
る。
SUMMARY OF THE INVENTION The present invention for solving the above problems is directed to a purifying apparatus for purifying water to be treated which has been contaminated in an aqueous coating booth and returned from the coating booth to a main tank via a treated water return path. In the above, the main tank is connected via a treated water supply pipeline, a floating treatment tank for levitating the treated water, and the treated water supply pipeline are provided,
A treated water pump for feeding the treated water in the main tank to the floating treatment tank, a pressurized water tank connected to the floating treatment tank via a connection pipe, and an air compressor for supplying compressed air to the pressurized water tank. And a treated water pump which is provided in the connection pipeline and which feeds treated water treated in the floating treatment tank to a pressurized water tank, and a portion of the pressurized treated water containing air in the pressurized water tank. Pipes are mixed so as to be mixed with the water to be treated in the treated water supply pipe and the rest of the pressurized treated water is mixed with the water to be treated in the treated water return passage. Is.

【0008】[0008]

【作用】本発明の浄化処理装置は、被処理水ポンプによ
り、主タンクから被処理水供給管路を介して浮上処理タ
ンクに被処理水が供給される。なお、被処理水供給管路
の途中で、凝集剤、助剤、pH調整剤等の薬剤が被処理
水に添加され、混合される。これにより、被処理水中の
塗料が凝集してフロックが形成される。
In the purification treatment apparatus of the present invention, the treated water is supplied from the main tank to the levitation treatment tank by the treated water pump via the treated water supply pipe line. Incidentally, chemicals such as a coagulant, an auxiliary agent, and a pH adjusting agent are added to and mixed with the water to be treated in the way of the water to be treated supply line. As a result, the paint in the water to be treated aggregates to form flocs.

【0009】このフロック形成水は、加圧水タンクから
のエアを含有する加圧処理水が混合されて浮上処理タン
クに導かれる。そして浮上処理タンクでは、フロックが
加圧水中に含まれる微粒の気泡とともに浮上し、浮上し
たフロックは回収タンク等に回収される。清澄になった
処理水は、処理水ポンプにより加圧水タンクに送られ
る。この加圧水タンクでは、エアコンプレッサから圧縮
エアが供給されるので、エアを含有する加圧処理水とさ
れる。そして、この加圧処理水の一部は前記被処理水供
給管路内の被処理水に混合され、かつ、該加圧処理水の
残部は前記被処理水帰還路内の被処理水に混合される。
ここで、浮上処理タンクで処理された処理水には、上記
被処理水供給管路で添加された凝集剤等の薬剤が多少含
有されている。このエア及び薬剤を含有する加圧処理水
が、水性塗装ブースから帰還する被処理水に混合される
と、エアの攪拌作用により、水性塗装ブースから帰還す
る被処理水中の塗料と上記加圧処理水中に含有されてい
る薬剤とが確実に混合される。そして、上記加圧処理水
中に含有されている薬剤の量に応じて被処理水中の塗料
が凝集し、フロックが形成される。このフロック形成水
が主タンクに帰還すると、フロックがエアの気泡ととも
に良好に浮上する。
The flock forming water is mixed with the pressurized treated water containing air from the pressurized water tank and is introduced to the floating treatment tank. Then, in the flotation treatment tank, the flocs float with the fine air bubbles contained in the pressurized water, and the flocs that have floated are collected in a collection tank or the like. The clarified treated water is sent to the pressurized water tank by the treated water pump. In this pressurized water tank, compressed air is supplied from the air compressor, so that it is pressurized treated water containing air. Then, a part of the pressurized treated water is mixed with the treated water in the treated water supply pipe, and the rest of the pressurized treated water is mixed with the treated water in the treated water return passage. To be done.
Here, the treated water treated in the flotation treatment tank contains some amount of a chemical such as a coagulant added in the treated water supply pipe. When this pressure-treated water containing air and chemicals is mixed with the water to be treated returning from the water-based coating booth, the agitating action of the air causes the paint in the water to be treated returning from the water-based coating booth and the above-mentioned pressure treatment. The drug contained in the water is surely mixed. Then, the paint in the water to be treated agglomerates according to the amount of the drug contained in the pressure-treated water to form flocs. When this flock forming water returns to the main tank, the flock floats well together with air bubbles.

【0010】このように本発明では、浮上処理タンクで
処理され、凝集剤等の薬剤を含有する処理水が加圧水タ
ンクに送られて、エア及び薬剤を含有する加圧処理水と
され、この加圧処理水の一部は塗装ブースから帰還する
被処理水帰還路に送られる。このため、処理水中の薬剤
は、被処理水帰還路内で、エアの攪拌作用により被処理
水中の塗料と確実に混合されて塗料を凝集させるので、
処理水中に含まれる薬剤の量に応じた分のフロックを確
実に形成させることができる。しかもこのフロックは、
被処理水帰還路から主タンクに導入される際に、上記エ
アの作用により、確実に浮上される。また、従来装置の
ように、浮上処理タンクから薬剤を含有する処理水が直
接主タンク内に帰還されて、主タンク内でフロックが形
成されることがない。このため、主タンク内において、
フロックが沈澱するのを有効に抑えて、浮上したフロッ
クを容易に回収することができる。
As described above, in the present invention, the treated water treated in the flotation treatment tank and containing the chemical such as a flocculant is sent to the pressurized water tank to be the pressurized treated water containing the air and the chemical. Part of the pressure-treated water is sent to the treated water return path that returns from the coating booth. Therefore, the chemicals in the treated water are reliably mixed with the coating material in the treated water by the stirring action of the air in the treated water return path, so that the coating material agglomerates.
It is possible to reliably form the amount of flocs according to the amount of the chemical contained in the treated water. Moreover, this flock is
When introduced into the main tank from the treated water return path, it is reliably floated by the action of the air. Further, unlike the conventional apparatus, the treated water containing the chemical is not directly returned from the floating treatment tank into the main tank, and no flocs are formed in the main tank. Therefore, in the main tank,
Floating flocs can be easily collected by effectively suppressing the flocs from settling.

【0011】[0011]

【実施例】以下、本発明の実施例を説明する。本実施例
の水性塗装ブースの被処理水の浄化処理装置は、実際に
用いる浄化処理装置を1/2000に縮小したものであ
る。この浄化処理装置は、図1に示すように、循環ポン
プ1により、主タンク2から水性塗装ブース3に送ら
れ、塗装ブース3で塗料ミストを捕集して汚染され、被
処理水帰還路4を介して主タンク2に帰還した被処理水
を浄化するものである。
EXAMPLES Examples of the present invention will be described below. The purification treatment apparatus for the water to be treated in the water-based coating booth of this embodiment is obtained by reducing the purification treatment apparatus actually used to 1/2000. As shown in FIG. 1, this purifying apparatus is sent from a main tank 2 to a water-based coating booth 3 by a circulation pump 1 and collects paint mist in the coating booth 3 to be contaminated. The water to be treated returned to the main tank 2 via the is purified.

【0012】主タンク2には、主タンク2の上部に接続
された被処理水供給管路5を介して浮上処理タンク6が
接続されている。なお被処理水供給管路5が接続された
主タンク2の上部にはフィルタ機構2aが配設されてお
り、主タンク2内に浮上している固形物や浮上フロック
等が回収されるようになっている。この被処理水供給管
路5には、主タンク2内の被処理水を浮上処理タンク6
に送り込む被処理水ポンプ7と、被処理水ポンプ7の下
流側に、凝集剤等の薬剤が添加、混合される凝集タンク
8とが設けられている。
A floating treatment tank 6 is connected to the main tank 2 through a treated water supply pipe line 5 connected to the upper portion of the main tank 2. A filter mechanism 2a is provided above the main tank 2 to which the water to be treated supply pipe 5 is connected, so that solid matters floating in the main tank 2 and floating flocs can be collected. Has become. The treated water in the main tank 2 is floated in the treated water supply pipeline 5.
A to-be-processed water pump 7 to be sent to and a coagulation tank 8 to which a chemical agent such as a coagulant is added and mixed are provided on the downstream side of the to-be-treated water pump 7.

【0013】浮上処理タンク6は、浮上したフロックを
掻き取るためのスクレーパ9を具備している。なお、ス
クレーパ9によって掻き取られたフロックは、浮上処理
タンク6に隣接された回収タンク10に回収されるよう
になっている。そして、浮上処理タンク6には、第1接
続管路11を介して処理水タンク12が接続されてい
る。この処理水タンク12には、排水管13、及び第2
接続管路14が接続され、第2接続管路14は、電磁式
の方向制御弁15を介して第3接続管路16及び第4接
続管路17にそれぞれ接続されている。第2接続管路1
4の途中には処理水ポンプ18が設けられ、第3接続管
路16の途中にはエアコンプレッサ19を付設する加圧
水タンク20が設けられている。なお、第4接続管路1
7は、塗装ブース3からの被処理水帰還路4に接続され
ている。また、上記処理水タンク12にはSS濃度(固
形物濃度)を測定する濁度計12aが設けられ、この濁
度計12aからの信号を受けた制御部(図示せず)によ
り、上記方向制御弁15が制御されるようになってい
る。
The floating treatment tank 6 is equipped with a scraper 9 for scraping the floating flocs. The flocs scraped off by the scraper 9 are collected in a collection tank 10 adjacent to the flotation processing tank 6. Then, the treated water tank 12 is connected to the levitation treatment tank 6 via the first connection conduit 11. The treated water tank 12 includes a drain pipe 13 and a second pipe.
The connection conduit 14 is connected, and the second connection conduit 14 is connected to the third connection conduit 16 and the fourth connection conduit 17 via the electromagnetic directional control valve 15, respectively. Second connection line 1
A treated water pump 18 is provided in the middle of 4, and a pressurized water tank 20 provided with an air compressor 19 is provided in the third connecting conduit 16. The fourth connecting line 1
7 is connected to the treated water return path 4 from the coating booth 3. Further, the treated water tank 12 is provided with a turbidity meter 12a for measuring the SS concentration (solid matter concentration), and the direction control is performed by a control unit (not shown) that receives a signal from the turbidity meter 12a. The valve 15 is adapted to be controlled.

【0014】第3接続管路16は、電磁式の流量制御弁
21を介して、第5接続管路22及び第6接続管路23
に接続されている。そして、第5接続管路22は被処理
水供給管路5に接続され、第6接続管路23は塗装ブー
ス3からの被処理水帰還路4に接続されている。なお、
上記流量制御弁21は、図示しない制御部により、被処
理水ポンプ7によって主タン2から浮上処理タンク6に
送られた水量:aから排水管13から排出する水量:b
を引いた分(a−b)の加圧処理水を第6接続管路23
側に送り、残りの水量分の加圧処理水を第5接続管路2
2側に送るように制御される。
The third connecting conduit 16 is connected to the fifth connecting conduit 22 and the sixth connecting conduit 23 via the electromagnetic type flow control valve 21.
It is connected to the. The fifth connection pipeline 22 is connected to the treated water supply pipeline 5, and the sixth connection pipeline 23 is connected to the treated water return passage 4 from the coating booth 3. In addition,
The flow rate control valve 21 is controlled by a control unit (not shown) so that the amount of water sent from the main tank 2 to the flotation treatment tank 6 by the treated water pump 7 is from a:
The pressure-treated water corresponding to (a-b) is subtracted from the sixth connecting line 23.
Side, and the pressurized treated water for the remaining amount of water is supplied to the fifth connecting line 2
It is controlled to send to the 2 side.

【0015】上記各タンクの容量、使用薬剤等は、適宜
設定、選択することができるが、本実施例では以下のよ
うにした。なお、主タンク2内の水の1/10〜1/4
程度を被処理水ポンプ7で浮上処理タンク6に送ること
ができる。また、浮上処理タンク6で処理した処理水を
塗装ブース3から帰還する被処理水帰還路4内の被処理
水に混合させる割合は、多いほど好ましく、上記被処理
水の10%以上の処理水を混合させるようにすれば有効
でる。また、溶解性有機物(COD)対策で系外に排出
させる処理水の量は、全体の10〜30%程度とするこ
とができる。
The capacity of each of the above tanks, the chemicals used, and the like can be set and selected as appropriate, but in this embodiment, they are as follows. In addition, 1/10 to 1/4 of the water in the main tank 2
The degree can be sent to the flotation treatment tank 6 by the treated water pump 7. The ratio of mixing the treated water treated in the floating treatment tank 6 with the treated water in the treated water return path 4 returning from the coating booth 3 is preferably as large as possible, and the treated water is 10% or more of the treated water. It is effective to mix the two. In addition, the amount of treated water that is discharged out of the system as a measure for soluble organic substances (COD) can be about 10 to 30% of the whole.

【0016】主タンク2の容量:51リットル 循環ポンプ1の水量:11.6リットル/min 塗装ブース3のタンク水量:6リットル 被処理水ポンプ7の水量:1.7リットル/min 浮上処理タンク6の水量:3リットル 処理水タンク12の水量:0.5リットル 加圧水圧:3.0kg/cm2 加圧水比:1.3 凝集剤:硫酸バンド(対塗料10%添加) 助剤:ハクトロンA27−30M(伯東製、1ppm添
加) pH調整剤:1N−苛性ソーダ(pH計にて6.5〜7
に調整) 系外排水量と補給水量:50cc/min 上記浄化処理装置では、主タンク2内の上層部にある被
処理水が被処理水ポンプ7で被処理水供給管路5を介し
て浮上処理タンク6に送られる。被処理水供給管路5の
途中に設けられた凝集タンク8では上記薬剤が所定量添
加、混合され、被処理水中の塗料が凝集してフロックが
形成される。
Main tank 2 capacity: 51 liters Circulation pump 1 water volume: 11.6 liters / min Tank volume of coating booth 3: 6 liters Water to be treated pump 7 water volume: 1.7 liters / min Flotation treatment tank 6 Amount of water: 3 liters Water in treated water tank 12: 0.5 liters Pressurized water pressure: 3.0 kg / cm 2 Pressurized water ratio: 1.3 Flocculant: Sulfuric acid band (10% addition to paint) Auxiliary agent: Hakutron A27-30M (Hakuto, 1 ppm added) pH adjuster: 1N-caustic soda (6.5 to 7 with a pH meter)
Outside the system, the amount of drainage water and the amount of makeup water: 50 cc / min In the above-mentioned purification treatment device, the treated water in the upper layer portion in the main tank 2 is floated by the treated water pump 7 via the treated water supply pipe line 5. It is sent to the tank 6. A predetermined amount of the above chemicals is added and mixed in the coagulation tank 8 provided on the way of the treated water supply pipe line 5, and the paint in the treated water aggregates to form flocs.

【0017】このフロック形成水は、加圧水タンク20
からのエアを含有する加圧処理水が第3接続管路16及
び第5接続管路22を介して混合されて浮上処理タンク
6に導かれる。そして浮上処理タンク6では、フロック
が加圧水中に含まれる微粒の気泡とともに浮上し、浮上
したフロックはスクレーパ9により回収タンク10に回
収され、清澄になった処理水のみが第1接続管路11を
介して処理水タンク12に送られる。
This flock forming water is stored in the pressurized water tank 20.
The pressurized treated water containing air from is mixed via the third connecting pipe line 16 and the fifth connecting pipe line 22 and introduced into the floating treatment tank 6. Then, in the flotation treatment tank 6, the flocs are floated together with the fine bubbles contained in the pressurized water, and the flocs that have floated are collected by the scraper 9 in the collection tank 10, and only the clarified treatment water flows through the first connection pipe line 11. It is sent to the treated water tank 12 via.

【0018】処理水タンク12内の処理水は、処理水ポ
ンプ18により、第2接続管路14及び第3接続管路1
6を介して加圧水タンク20に送られる。この加圧水タ
ンク20では、エアコンプレッサ22から圧縮エアが供
給されるので、エアを含有する加圧処理水とされる。そ
して、この加圧処理水は、上記流量制御弁21の制御に
より、その一部が第3接続管路16及び第5接続管路2
2を介して被処理水供給管路5内の被処理水に混合さ
れ、かつ、該加圧処理水の残部が第3接続管路16及び
第6接続管路23を介して前記被処理水帰還路4内の被
処理水に混合される。ここで、浮上処理タンク6で処理
された処理水には、上記凝集タンク8で添加された凝集
剤等の薬剤が多少含有されている。このエア及び薬剤を
含有する処理水が、水性塗装ブース3から帰還する被処
理水に混合されると、エアの攪拌作用により、水性塗装
ブース3から帰還する被処理水中の塗料と上記加圧処理
水中に含有されている薬剤とが確実に混合される。そし
て、上記加圧処理水中に含有されている薬剤の量に応じ
て被処理水中の塗料が凝集し、フロックが形成される。
The treated water in the treated water tank 12 is processed by the treated water pump 18 into the second connecting pipe line 14 and the third connecting pipe line 1.
It is sent to the pressurized water tank 20 via 6. Since compressed air is supplied from the air compressor 22 to the pressurized water tank 20, the pressurized water is treated as pressurized water containing air. Then, a part of the pressurized treated water is controlled by the flow control valve 21, and a part of the pressurized treated water is connected to the third connecting pipe 16 and the fifth connecting pipe 2.
2 is mixed with the to-be-treated water in the to-be-treated water supply pipeline 5, and the remaining part of the pressurized treated water is treated water via the third connecting pipeline 16 and the sixth connecting pipeline 23. It is mixed with the water to be treated in the return path 4. Here, the treated water treated in the flotation treatment tank 6 contains some chemicals such as a flocculant added in the flocculation tank 8. When this treated water containing air and chemicals is mixed with the water to be treated returning from the water-based coating booth 3, the paint in the water to be treated returning from the water-based coating booth 3 and the above-mentioned pressure treatment are caused by the stirring action of the air. The drug contained in the water is surely mixed. Then, the paint in the water to be treated agglomerates according to the amount of the drug contained in the pressure-treated water to form flocs.

【0019】このフロック形成水が被処理水帰還路4を
介して主タンク2に帰還すると、フロックがエアの気泡
とともに良好に浮上する。なお、主タンク2内で浮上し
た浮上フロックは、フィルタ機構2aにより回収され
る。また、処理水タンク12内の処理水の濁度が高いと
きは、濁度計12aからの信号を受けた制御部(図示せ
ず)の制御により、方向制御弁15が切り換えられて、
処理水タンク12からの処理水は、加圧水タンク20に
送られることなく、第4接続管路17を介して直接塗装
ブース3からの被処理水帰還路4に混合される。さら
に、処理水タンク12中の処理水の一部は、溶解性有機
物(COD)対策の意味で、排水管13から系外に排出
される。またこの排出水量分は、主タンク2内に工業用
水が補給されるようになっている。
When this flock forming water returns to the main tank 2 through the treated water return path 4, the flock floats well together with air bubbles. The floating flocs that have floated in the main tank 2 are collected by the filter mechanism 2a. When the turbidity of the treated water in the treated water tank 12 is high, the directional control valve 15 is switched by the control of the control unit (not shown) that receives a signal from the turbidity meter 12a.
The treated water from the treated water tank 12 is not sent to the pressurized water tank 20, but is directly mixed with the treated water return passage 4 from the coating booth 3 via the fourth connection pipe 17. Furthermore, a part of the treated water in the treated water tank 12 is discharged from the drain pipe 13 to the outside of the system in order to prevent soluble organic substances (COD). In addition, industrial water is supplied to the main tank 2 by the amount of the discharged water.

【0020】このように本実施例では、浮上処理タンク
6で処理された凝集剤等の薬剤を含有する処理水が、処
理水タンク12を経て処理水ポンプ13により加圧水タ
ンク20に送られて、エア及び薬剤を含有する加圧処理
水とされ、この加圧処理水の一部は塗装ブース3から帰
還する被処理水帰還路4内の被処理水中に混合される。
このため処理水中に含まれる薬剤は、主タンク2と比べ
て格段に狭い被処理水帰還路4内で、上記エアの攪拌作
用により、塗装ブース3から帰還する被処理水中の塗料
と確実に混合されて塗料を凝集させるので、その薬剤の
量に応じた分のフロックを確実に形成することができ
る。しかもこのフロックは、被処理水帰還路4から主タ
ンク2に導入される際に、エアの作用により、確実に浮
上される。また、従来装置のように、浮上処理タンク6
から薬剤を含有する処理水が直接主タンク2内に帰還さ
れて、主タンク2内でフロックが形成されることがな
い。このため、主タンク2内において、フロックが沈澱
するのを有効に抑えて、浮上したフロックを容易に回収
することができる。したがって、主タンク2内の水をよ
り清澄化することが可能となり、また主タンク2内の清
掃頻度が大幅に減らすことができる。
As described above, in the present embodiment, the treated water containing the chemical such as the flocculant treated in the floating treatment tank 6 is sent to the pressurized water tank 20 by the treated water pump 13 through the treated water tank 12. The pressurized treated water contains air and chemicals, and a part of the pressurized treated water is mixed with the treated water in the treated water return path 4 returning from the coating booth 3.
Therefore, the chemical contained in the treated water is surely mixed with the paint in the treated water returning from the coating booth 3 in the treated water return path 4 which is much narrower than the main tank 2 by the stirring action of the air. As a result, the paint is aggregated, so that it is possible to surely form the flock corresponding to the amount of the drug. Moreover, when introduced into the main tank 2 from the treated water return path 4, the flocs are reliably floated by the action of air. In addition, as in the conventional device, the floating treatment tank 6
The treated water containing the chemicals is not directly returned to the main tank 2 and no flocs are formed in the main tank 2. Therefore, it is possible to effectively prevent the flocs from settling in the main tank 2 and easily collect the floating flocs. Therefore, the water in the main tank 2 can be further clarified, and the frequency of cleaning the main tank 2 can be significantly reduced.

【0021】また、主タンク2内の下層部の水はSS濃
度(固形物濃度)が低くなるので、循環ポンプ1の閉塞
のトラブルを減少させることができる。さらに、主タン
ク2内の上層部の水はよりSS濃度が高いものとなり、
これが浮上処理タンク6に送液されるので、処理水量の
削減が可能となり、これによっても浄化処理装置のコン
パクト化をすることができる。
Further, since the water in the lower layer in the main tank 2 has a low SS concentration (solid matter concentration), the trouble of clogging of the circulation pump 1 can be reduced. Furthermore, the upper layer water in the main tank 2 has a higher SS concentration,
Since this is sent to the floating treatment tank 6, it is possible to reduce the amount of treated water, which also makes it possible to make the purification treatment apparatus compact.

【0022】さらにまた、従来の浄化装置では、主タン
ク内に攪拌機やエアポンプ等を別途設けて、主タンク2
内で沈澱物を除去するようにしていたが、本実施例装置
によれば、これらの装置を別途設ける必要がなく、浄化
処理装置の低コスト化を図ることができる。さらに、処
理タンク12内の濁度が高くなれば、方向制御弁15の
制御により、処理水が加圧水タンク20へ送られること
なく、被処理水帰還路4に送られるので、加圧水タンク
20等が固形物により閉塞されることを防止することが
できる。
Furthermore, in the conventional purifying apparatus, an agitator, an air pump, etc. are separately provided in the main tank so that the main tank 2
Although the precipitate was removed inside the apparatus, the apparatus of the present embodiment does not need to separately provide these apparatuses, and the cost of the purification treatment apparatus can be reduced. Further, if the turbidity in the treated tank 12 becomes high, the treated water is sent to the treated water return path 4 without being sent to the pressurized water tank 20 by the control of the direction control valve 15, so that the pressurized water tank 20 or the like is It is possible to prevent clogging with solid matter.

【0023】(浄化性能評価)自動車用上塗り水性塗料
として、TWX−200及びTWX−100−2の混合
塗料(関西ペイント製、混合割合60%)、NWB−1
30(日本ペイント製、混合割合20%)、HW−10
(ハーバーツペイント製、混合割合20%)の3種類を
準備し、それぞれ工業用水で所定濃度に希釈し、試料水
1〜3を調整した。この試料水1〜3の性状を表1に示
す。
(Evaluation of Purification Performance) As a top coating aqueous paint for automobiles, a mixed paint of TWX-200 and TWX-100-2 (manufactured by Kansai Paint, mixing ratio 60%), NWB-1.
30 (manufactured by Nippon Paint, mixing ratio 20%), HW-10
Three types (manufactured by Herberts Paint, mixing ratio 20%) were prepared, and each was diluted with industrial water to a predetermined concentration to prepare sample waters 1 to 3. Table 1 shows the properties of the sample waters 1 to 3.

【0024】[0024]

【表1】 上記各試料水について、前記実施例装置を用いて前記処
理条件で浄化処理した。各処理水の性状を測定した結果
を表2に示す。なお、透視度はJISK−0102の透
視度に準じて測定し、SV30はメスシリンダ法にて測定
した。
[Table 1] Each of the sample waters was subjected to a purification treatment under the treatment conditions using the apparatus of the example. The results of measuring the properties of each treated water are shown in Table 2. The transparency was measured according to the transparency of JIS K-0102, and SV 30 was measured by the graduated cylinder method.

【0025】[0025]

【表2】 これらの結果から、本実施例装置により、清澄度の高い
処理水が得られることがわかる。また、主タンク2内で
は沈澱フロックの発生が認められなかった。さらに、加
圧水を塗装ブース3からの被処理水帰還路4内の被処理
水に混合させることによる、主タンク2内での発泡等の
トラブルもなかった。
[Table 2] From these results, it can be seen that the apparatus of the present example can provide treated water with high clarity. In addition, no generation of precipitated flocs was observed in the main tank 2. Further, there was no trouble such as foaming in the main tank 2 caused by mixing the pressurized water with the treated water in the treated water return path 4 from the coating booth 3.

【0026】[0026]

【発明の効果】以上詳述したように本発明の装置によれ
ば、浮上処理タンクで処理された処理水中に含有される
凝集剤等の薬剤を有効利用しつつ、エアの作用により、
主タンク内において、フロックが沈澱するのを有効に抑
えて、浮上したフロックを容易に回収することができ、
主タンク内の清澄度をより高めることができる。したが
って、主タンク内の沈澱フロックを除去等するために、
攪拌機やエアポンプ等を別途設ける必要がなく、浄化処
理装置の低コスト化にも貢献する。
As described in detail above, according to the apparatus of the present invention, by effectively utilizing the chemicals such as the coagulant contained in the treated water treated in the flotation treatment tank, the action of air causes
In the main tank, flocs can be effectively suppressed from settling, and floating flocs can be easily collected.
The clarity of the main tank can be increased. Therefore, in order to remove sedimented flocs in the main tank,
There is no need to separately install a stirrer, an air pump, etc., which also contributes to cost reduction of the purification treatment device.

【図面の簡単な説明】[Brief description of drawings]

【図1】本実施例の浄化処理装置を概略的に説明する模
式図である。
FIG. 1 is a schematic diagram schematically illustrating a purification processing apparatus of this embodiment.

【図2】従来の浄化処理装置を概略的に説明する模式図
である。
FIG. 2 is a schematic diagram schematically illustrating a conventional purification processing device.

【符号の説明】[Explanation of symbols]

2…主タンク 3…水性塗装ブース 4
…被処理水帰還路 5…被処理水供給管路 6…浮上処理タンク 7
…被処理水ポンプ 11…第1接続管路 14…第2接続管路 1
6…第3接続管路 18…処理水ポンプ 19…エアコンプレッサ 2
0…加圧水タンク 22…第5接続管路 23…第6接続管路
2 ... Main tank 3 ... Water-based coating booth 4
... Treated water return path 5 ... Treated water supply pipeline 6 ... Flotation treatment tank 7
... Treated water pump 11 ... First connection line 14 ... Second connection line 1
6 ... 3rd connection pipe 18 ... Treated water pump 19 ... Air compressor 2
0 ... Pressurized water tank 22 ... Fifth connection pipeline 23 ... Sixth connection pipeline

───────────────────────────────────────────────────── フロントページの続き (72)発明者 斉木 潤 三重県四日市市別名町6−6−9 伯東株 式会社四日市研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Jun Saiki 6-6-9 Aliascho, Yokkaichi City, Mie Prefecture Yokkaichi Research Institute, Hakuto Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 水性塗装ブースで汚染され該塗装ブース
から被処理水帰還路を介して主タンクに帰還した被処理
水を浄化する浄化処理装置であって、 前記主タンクと被処理水供給管路を介して接続され、前
記被処理水を浮上処理する浮上処理タンクと、 前記被処理水供給管路に設けられ、前記主タンク内の被
処理水を前記浮上処理タンクに送り込む被処理水ポンプ
と、 前記浮上処理タンクと接続管路を介して接続された加圧
水タンクと、 該加圧水タンクに圧縮エアを供給するエアコンプレッサ
と、 前記接続管路に設けられ、前記浮上処理タンクで処理さ
れた処理水を加圧水タンクに送り込む処理水ポンプとを
具備し、 前記加圧水タンク内のエアを含有する加圧処理水の一部
を前記被処理水供給管路内の被処理水に混合させ、か
つ、該加圧処理水の残部を前記被処理水帰還路内の被処
理水に混合させるように配管したことを特徴とする水性
塗装ブース被処理水の浄化処理装置。
1. A purification treatment device for purifying water to be treated which has been contaminated in an aqueous coating booth and has returned to the main tank from the coating booth via a treated water return path, wherein the main tank and the treated water supply pipe A flotation treatment tank that is connected via a channel to levitate the treated water, and a treated water pump that is provided in the treated water supply pipe and that feeds the treated water in the main tank to the flotation tank. A pressurized water tank connected to the levitation treatment tank via a connection pipeline; an air compressor for supplying compressed air to the pressurized water tank; and a treatment provided in the connection pipeline and treated in the levitation treatment tank. A treated water pump for feeding water to the pressurized water tank, wherein a portion of the pressurized treated water containing air in the pressurized water tank is mixed with the treated water in the treated water supply pipeline, and Pressurization An apparatus for purifying water to be treated in a water-based coating booth, characterized in that piping for mixing the rest of the water to be mixed with the water to be treated in the treated water return path.
JP4310442A 1992-11-19 1992-11-19 Purification treatment device for water to be treated of aqueous painting booth Pending JPH06154730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4310442A JPH06154730A (en) 1992-11-19 1992-11-19 Purification treatment device for water to be treated of aqueous painting booth

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4310442A JPH06154730A (en) 1992-11-19 1992-11-19 Purification treatment device for water to be treated of aqueous painting booth

Publications (1)

Publication Number Publication Date
JPH06154730A true JPH06154730A (en) 1994-06-03

Family

ID=18005301

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4310442A Pending JPH06154730A (en) 1992-11-19 1992-11-19 Purification treatment device for water to be treated of aqueous painting booth

Country Status (1)

Country Link
JP (1) JPH06154730A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101130816B1 (en) * 2009-11-02 2012-04-12 주식회사 동신이엔텍 Flotation tank for rotary injection of nano size bubble
CN102659263A (en) * 2012-03-06 2012-09-12 山东迈赫自动化装备股份有限公司 Mechanical waste paint treatment device
WO2021024969A1 (en) * 2019-08-03 2021-02-11 株式会社Aquas Paint recovery system and pressurized water generation apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101130816B1 (en) * 2009-11-02 2012-04-12 주식회사 동신이엔텍 Flotation tank for rotary injection of nano size bubble
CN102659263A (en) * 2012-03-06 2012-09-12 山东迈赫自动化装备股份有限公司 Mechanical waste paint treatment device
WO2021024969A1 (en) * 2019-08-03 2021-02-11 株式会社Aquas Paint recovery system and pressurized water generation apparatus
JP2021023875A (en) * 2019-08-03 2021-02-22 株式会社Aquas Paint recovery system

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