JP4590481B2 - Floating separation purification method using air bubbles in wet paint booth circulating water - Google Patents

Floating separation purification method using air bubbles in wet paint booth circulating water Download PDF

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JP4590481B2
JP4590481B2 JP2009095270A JP2009095270A JP4590481B2 JP 4590481 B2 JP4590481 B2 JP 4590481B2 JP 2009095270 A JP2009095270 A JP 2009095270A JP 2009095270 A JP2009095270 A JP 2009095270A JP 4590481 B2 JP4590481 B2 JP 4590481B2
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雅人 宮本
伸二 萩野
淳一 諏訪部
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マックテクニカルシステムズ株式会社
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本発明は、湿式塗装ブースにおける塗装工程で、湿式塗装ブース内の循環水に塗料ミストが取り込まれてなる塗料滓を、アルカリイオン水性洗浄剤（特願２００８−１５５９５３）固有のきめ細かな気泡を湿式塗装ブースのベンチュリーの機能によって超微粒子化した気泡で溶剤と不粘着化させた塗料クズを液面へと個別に浮上分離させて、溶剤と不粘着化した塗料クズとを別々に回収する塗料滓の浮上分離浄化方法と浄化された循環水を有機物の分解能力に優れたバイオ生剤マイクローブ用いてヘキサン値、ＢＯＤ値、ＣＯＤ値などを生分解処理させて排水する方法に関する。The present invention is a coating process in a wet coating booth, in which a paint soot in which paint mist is taken into circulating water in the wet coating booth is wetted with fine bubbles inherent to an alkaline ion aqueous cleaner (Japanese Patent Application No. 2008-155953). Paint slag that separates solvent waste and non-adhesive paint scraps separately from the surface of the liquid with ultrafine particles generated by the paint booth venturi function and separately collects the solvent and non-stick paint waste. The levitation separation purification method and the method of draining the purified circulating water by biodegrading the hexane value, the BOD value, the COD value, etc. using the bio-robot microbe having excellent organic substance decomposing ability.

従来は、各種金属製品、樹脂製品などに水を使う湿式塗装ブースが各業界分野で多く用いられているが、湿式塗装ブース内の循環水に塗料ミストが取り込まれる。塗料ミストは循環水槽に設けられた回収槽に集められるが、それが循環水槽内の底に沈殿するために定期的な清掃を強いられ清掃費が甚大になっていた。そこで塗装ミストの処理方法に関してこれまでに強アルカリ性洗剤、界面活性剤、凝集剤及びマイクロバブル発生装置などを用いて塗装ミストの粘着性をなくして液面へ浮上させて回収してきた。Conventionally, wet coating booths that use water for various metal products, resin products, and the like are often used in various industry fields, but paint mist is taken into the circulating water in the wet coating booths. The paint mist is collected in a collection tank provided in the circulating water tank, but it settles on the bottom in the circulating water tank, so that it is forced to perform regular cleaning, and the cleaning cost is large. Thus, with regard to the method for treating the coating mist, the coating mist has been removed by using a strong alkaline detergent, a surfactant, a flocculant, a microbubble generator, etc., and has been floated and recovered.

特開２００４−２２３４９２号公報（１０頁）JP 2004-223492 A (page 10)

発明が解決しようとする課題Problems to be solved by the invention

しかるに、特許文献１などのような従来の塗料ミストの浮上分離方法では、塗料滓に比重の小さな微粒子を接触付着させて積極的に且つ確実に塗料滓の液面への浮上を促し、塗料滓を効率的に回収分離できるようにした浮上分離方法と塗料滓の粘着性をなくすために界面活性剤又はその含有液で湿潤させた気泡を浮上分離方法であるが、微粒子の径がマイクロメートル（μｍ）からナノメートル（ｎｍ）の気泡を発生させる装置などを用いて浮上分離させる方法では、湿式塗装ブースの循環水槽内に気泡を発生させる装置の設置や塗料滓の粘着性をなくすための界面活性剤又はその含有液の使用や注入装置の設置などが必要となり、湿式塗装ブースの改造工事が発生してかなりの費用の負担が起こる。また、浮上分離させた後の塗料滓の回収方法や浄化方法などが明確化されていない。However, in the conventional paint mist floating separation method such as Patent Document 1, fine particles having a small specific gravity are contacted and adhered to the paint soot to positively and surely promote the paint soot to rise to the liquid surface. Is a flotation separation method that enables efficient recovery and separation of bubbles, and a flotation separation method that removes air bubbles moistened with a surfactant or a liquid containing the same in order to eliminate the stickiness of the paint cake. (μm) to nanometer (nm) bubbles are generated and separated by a device that generates bubbles in the circulation tank of the wet paint booth, and an interface for eliminating the stickiness of the paint bottle. It is necessary to use an activator or a liquid containing the activator, and to install an injection device, so that the wet painting booth is remodeled and a considerable cost is incurred. In addition, the method for collecting and purifying the paint soot after being floated and separated is not clarified.

本発明は、上記問題点を解決するもので、単に湿式塗装ブースの循環水槽内にアルカリイオン水性洗浄剤（特願２００８−１５５９５３）の濃度が２％〜３％になるように注入することによって循環水に塗料ミストが取り込まれてなる塗料滓を、アルカリイオン水性洗浄剤（特願２００８−１５５９５３）固有のきめ細かな気泡を湿式塗装ブースのベンチュリーの機能によって超微粒子化した気泡で溶剤と不粘着化させた塗料クズとに気泡分離させて液面へと浮上分離させて溶剤と不粘着化した塗料クズを別々に回収する塗料滓の浮上分離回収浄化方法と浄化された循環水を有機物の分解能力に優れたバイオ生剤マイクローブを用いてヘキ値、ＢＯＤ値、ＣＯＤ値などを生分解処理させて排水する方法を提供することを目的とする。The present invention solves the above-mentioned problems, and by simply injecting the alkali ion aqueous cleaning agent (Japanese Patent Application No. 2008-155953) to a concentration of 2% to 3% in the circulating water tank of the wet painting booth. The paint soot in which the paint mist is taken into the circulating water, the fine bubbles unique to the alkaline ionized aqueous cleaning agent (Japanese Patent Application No. 2008-155953) are made into fine particles by the function of the Venturi of the wet paint booth, and the solvent is not sticky The air bubbles are separated into the paint waste that has been made to float and float to the liquid surface to separate the solvent and non-adhesive paint waste separately. An object of the present invention is to provide a method of biodegrading and draining a hex value, a BOD value, a COD value, etc., using a bio-biopharmaceutical microlobe having excellent ability.

発明が解決するための手段Means for Solving the Invention

上記目的を達成すべく、請求項１に記載の発明の要旨は、水を原料としてイオン化させた水に少量のメタケイ酸ナトリウムを添加した製品アルカリイオン水性洗浄剤（特願２００８−１５５９５３）の特長である固有のきめ細かな気泡を湿式塗装ブースのベンチュリーの機能によって超微粒子化した気泡で塗料ミストを液面へと気泡分離させると共に強力な洗浄力とメタケイ酸ナトリウムの強力な防錆膜の働きによって湿式塗装ブース内の壁面、配管中、ベンチュリーブース内、排気ファンなどに付着した塗料ミストの洗浄及び再付着の防止を行うことができる。また、湿式塗装ブースの循環水槽内にアルカリイオン水性洗浄剤（特願２００８−１５５９５３）の濃度が２％〜３％になるように注入することによって循環水に塗料ミストが取り込まれてなる塗料滓を、アルカリイオン水性洗浄剤（特願２００８−１５５９５３）固有のきめ細かな気泡を湿式塗装ブースのベンチュリーの機能によって超微粒子化した気泡で溶剤と不粘着化した塗料クズとに個別に気泡分離させて液面へと浮上分離させる。In order to achieve the above object, the gist of the invention described in claim 1 is the feature of a product alkaline ion aqueous detergent (Japanese Patent Application No. 2008-155953) in which a small amount of sodium metasilicate is added to water ionized using water as a raw material. The unique fine bubbles are made into ultra fine particles by the function of the Venturi of the wet painting booth, and the paint mist is separated into the liquid surface by the function of powerful cleaning power and the strong rust preventive film of sodium metasilicate. It is possible to clean and prevent re-adhesion of the paint mist adhering to the wall surface in the wet paint booth, in the piping, in the venturi booth, and in the exhaust fan. Also, a paint mist in which paint mist is taken into the circulating water by injecting into the circulating water tank of the wet coating booth so that the concentration of the aqueous alkaline ion detergent (Japanese Patent Application No. 2008-155953) is 2% to 3%. The fine bubbles inherent in the alkaline ionized aqueous cleaning agent (Japanese Patent Application No. 2008-155953) are made into ultrafine particles by the function of the venturi of the wet coating booth, and the bubbles are separated into solvent and non-adhesive paint waste individually. Let it float to the liquid surface.

請求項１の発明のごとく、請求項２は、塗装工程の前処理工程として脱脂洗浄工程に使用されているアルカリイオン水性洗浄剤（特願２００８−１５５９５３）の廃液を湿式塗装ブースの循環水槽内に再利用することによって請求項１と同等の作用を得る事ができる。請求項３のごとく、湿式塗装ブースの循環水に塗料ミストが取り込まれてなる塗料滓を、アルカリイオン水性洗浄剤（特願２００８−１５５９５３）固有のきめ細かな気泡を湿式塗装ブースのベンチュリーの機能によって超微粒子化した気泡で溶剤と不粘着化した塗料クズとに個別に気泡分離させて液面へと浮上分離させて溶剤は油水分離装置ユーテック（旭化成せんい（株）製）などで回収する方法と油吸着剤Ｃ−マット（（株）ユウホウ製）などを用いて溶剤の上に乗せ吸着させて回収する。また、不粘着化させた塗料クズは、スクリーン式固液分離装置（ツルミポンプ製）などの固液分離装置を用いて回収する。
請求項４のごとく、湿式塗装ブースの循環水として用いているアルカリイオン水性洗浄剤（特願２００８−１５５９５３）の成分中には、ヘキサン値、ＢＯＤ値、ＣＯＤ値などを全く含んでいないので浄化する循環水の水質に影響を及ぼす事なく溶剤と不粘着化した塗料クズとに個別に浮上分離回収し、浄化された循環水からは、カルボン酸といわれる有機酸を多く検出することができる。その内訳は蟻酸・酢酸・プロピオン酸・酪酸・乳酸・吉草酸等であるが、その発生原因の多くは塗料中に含まれる物質が循環水中で加水分解や有機酸発酵などにより生成されると考えられる。浄化された循環水の水質を分析した結果、ヘキサン値、ＢＯＤ値、ＣＯＤ値などが次第に悪化していく現象を図４のデーター１で判る。図５のデーター１−１では、循環水４００ｌを別タンクに引き抜き後に塗装前処理工程で使用されている脱脂用アルカリイオン水性洗浄剤（特願２００８−１５５９５３）の廃液４００ｌを循環水に補充し、引き抜いた循環水４００ｌを微生物生分解処理を２４時間行なったデーターである。図６のデーター１−２では、図５のデーター１−１の微生物生分解処理を更に７日間行なったデーターである。図７のデーター１−３では、循環水の原水と微生物生分解処理を７日間行なって水質浄化の低減度を比較したデーターである。又、１３ヶ月間に及んだこれらの試験データーから有機物の分解能力に優れたバイオ生剤マイクローブを用いて生分解処理すればヘキサン値、ＢＯＤ値、ＣＯＤ値を低減させて水質汚濁防止法などの放流水の水質基準をクリアーして下水道などに排出することができる事が判った。これらの事から、この浄化された循環水を一旦別タンクに一定量を引き抜いて有機物の分解能力に優れたバイオ生剤マイクローブを用いて生分解処理を２４時間〜７日間掛けて行うか、又は、既設の廃水処理設備に排出して有機物の分解能力に優れたバイオ生剤マイクローブを用いて生分解処理行えばヘキサン値、ＢＯＤ値、ＣＯＤ値などを低減させて下水道などに排出することができる。As in the first aspect of the present invention, in the second aspect, the waste liquid of the alkaline ion aqueous cleaning agent (Japanese Patent Application No. 2008-155953) used in the degreasing cleaning step as a pretreatment step of the coating step is placed in a circulating water tank of a wet coating booth. By reusing, it is possible to obtain the same effect as in the first aspect. As described in claim 3, the paint soot in which the paint mist is taken into the circulating water of the wet paint booth, the fine bubbles inherent in the alkaline ionized aqueous cleaning agent (Japanese Patent Application No. 2008-155953) are produced by the function of the venturi of the wet paint booth. A method of recovering the solvent with an oil-water separator UTEC (manufactured by Asahi Kasei Corporation) An oil adsorbent C-mat (manufactured by Yuho Co., Ltd.) or the like is placed on the solvent to be adsorbed and recovered. Further, the non-tacked paint scraps are collected using a solid-liquid separation device such as a screen type solid-liquid separation device (manufactured by Tsurumi Pump).
As in claim 4, the components of the alkaline ion aqueous cleaning agent (Japanese Patent Application No. 2008-155953) used as the circulating water in the wet paint booth do not contain any hexane value, BOD value, COD value, etc. From the purified circulating water, a large amount of organic acid called carboxylic acid can be detected from the purified circulating water which is separately floated and collected separately from the solvent and non-adhesive paint waste without affecting the quality of the circulating water. The breakdown is formic acid, acetic acid, propionic acid, butyric acid, lactic acid, valeric acid, etc., but most of the causes are thought to be generated by hydrolysis, organic acid fermentation, etc. in the circulating water. It is done. As a result of analyzing the quality of the purified circulating water, the phenomenon in which the hexane value, BOD value, COD value, etc. gradually deteriorate can be seen from data 1 in FIG. In the data 1-1 of FIG. 5, 400 l of the circulating water is extracted from a separate tank, and 400 l of the degreasing alkaline ion aqueous cleaning agent (Japanese Patent Application No. 2008-155953) used in the pre-painting process is replenished to the circulating water. This is data obtained by subjecting the extracted circulating water 400 l to microbial biodegradation treatment for 24 hours. Data 1-2 in FIG. 6 is data obtained by further performing the microbial biodegradation treatment of data 1-1 in FIG. 5 for 7 days. Data 1-3 in FIG. 7 is data in which the degree of reduction in water quality purification is compared by performing the biodegradation treatment of the raw water and the microbial water for 7 days. In addition, if the biodegradation treatment is performed using these bio-medicine micro lobes, which have excellent ability to decompose organic matter, from these test data over a 13-month period, the water pollution prevention method can be achieved by reducing the hexane value, BOD value, and COD value. It has been found that it can be discharged into sewers by clearing the quality standards of discharged water. From these things, this purified circulating water is once withdrawn into a separate tank, and biodegradation treatment is performed over a period of 24 hours to 7 days using a bio-biomedical microlobe that has an excellent ability to decompose organic matter. Or, if it is discharged into existing wastewater treatment equipment and biodegradation treatment is performed using a bio-biomedical microlobe with excellent organic substance decomposition ability, the hexane value, BOD value, COD value, etc. will be reduced and discharged to sewers, etc. Can do.

発明の効果The invention's effect

以上のごとく、本発明により塗料滓をアルカリイオン水性洗浄剤（特願２００８−１５５９５３）固有のきめ細かな気泡を湿式塗装ブースのベンチュリーの機能によって超微粒子化した気泡で溶剤と不粘着化させた塗料クズとに個別に分離させて液面へと浮上分離させることによって、塗料滓を効率良く回収できる。また、浄化された循環水は一旦別タンクに一定量を引き抜いて有機物の分解能力に優れたバイオ生剤マイクローブ微生物を用いてヘキサン値、ＢＯＤ値、ＣＯＤ値などを生分解処理する事ができるので水質基準をクリアーさせて放流水を下水道などに排出することができる一体型の湿式塗装ブース循環水の浄化システムが提供され、低コストで、しかも地球温暖化対策など環境への負荷を大幅に低減することが可能となり極めて有益となる。As described above, according to the present invention, the paint cake is made non-tacky with the solvent by the fine bubbles formed by the function of the Venturi of the wet painting booth in the fine powder inherent to the alkaline ion aqueous detergent (Japanese Patent Application No. 2008-155953). By separating the waste separately and floating up to the liquid surface, the paint cake can be collected efficiently. The purified circulating water can be withdrawn into a separate tank and biodegraded with hexane value, BOD value, COD value, etc., using a bio-biopharmaceutical microbe microorganism with excellent organic substance decomposing ability. Therefore, an integrated wet painting booth purification system that can clear the water quality standard and discharge the discharged water to the sewer system is provided, and the cost to the environment such as measures against global warming is greatly reduced at a low cost. It can be reduced and is extremely beneficial.

以下、塗料滓をアルカリイオン水性洗浄剤（特願２００８−１５５９５３）固有のきめ細かな気泡を湿式塗装ブースのベンチュリーの機能によって超微粒子化した気泡で溶剤と不粘着化させた塗料クズと個別に分離させて液面へと浮上分離浄化方法とその回収方法及び微生物を用いてヘキサン値、ＢＯＤ値、ＣＯＤ値などを生分解処理して放流水の水質基準をクリアーさせて下水道などに排出する方法について詳述べする。
（１）実施形態１
湿式塗装ブースの循環水槽内にアルカリイオン水性洗浄剤（特願２００８−１５５９５３）の濃度が２％〜３％になるように注入することによって湿式塗装ブース備え付けの循環ポンプ１３を稼動させることでアルカリイオン水性洗浄剤（特願２００８−１５５９５３固有のきめ細かな気泡を湿式塗装ブースのベンチュリーの機能によって超微粒子化した気泡で塗料ミストをこの気泡に包み込み液面へと気泡分離させると共に強力な洗浄力とメタケイ酸ナトリウムの強力な防錆膜の働きによって湿式塗装ブース内の壁面、配管中、ベンチュリーブース内、排気ファンなどに付着した塗料ミストの洗浄及び再付着の防止をする。循環水に塗料ミストが取り込まれてなる塗料滓は、アルカリイオン水性洗浄剤（特願２００８−１５５９５３）固有のきめ細かな気泡を湿式塗装ブースのベンチュリーの機能によって超微粒子化した気泡で溶剤と不粘着化した塗料クズとに分かれるので個別に回収し浄化できる。In the following, paint bubbles are separated individually from fine particles inherent to alkaline ion detergent (Japanese Patent Application No. 2008-155953) made into fine particles by the function of the Venturi of the wet paint booth and non-adhesive with paint scraps. About the separation and purification method that floats to the liquid level, its recovery method, and the method of biodegrading hexane value, BOD value, COD value, etc. using microorganisms to clear the water quality standard of discharged water and discharging it to sewers etc. I will explain in detail.
(1) Embodiment 1
By injecting the alkali ion aqueous cleaning agent (Japanese Patent Application No. 2008-155953) into the circulating water tank of the wet coating booth so that the concentration becomes 2% to 3%, the circulating pump 13 provided with the wet coating booth is operated to operate the alkali. Ionic aqueous detergent (Patent application 2008-155953 unique fine bubbles are made into ultra fine particles by the function of the Venturi of the wet painting booth. The strong anti-corrosion film of sodium metasilicate prevents the paint mist from adhering to the walls, pipes, venturi booth, exhaust fan, etc. in the wet paint booth and prevents it from re-adhering. The paint cake that is taken in is inherent in the alkaline ionized aqueous cleaning agent (Japanese Patent Application No. 2008-155953). Since divided into a solvent and tack paint debris in bubbles micronized granular bubbles by the function of venturi wet paint booth can individually recovered purification.

本発明の塗料滓をアルカリイオン水性洗浄剤（特願２００８−１５５９５３）固有のきめ細かな気泡を湿式塗装ブースのベンチュリーの機能によって超微粒子化した気泡で溶剤と不粘着化した塗料クズとに個別に浮上分離させた回収方法は例えば次のように行なわれる。不粘着化した塗料クズは、残飯の回収などに良く用いられているスクリーン式固液分離装置（ツルミポンプ製）などを循環水槽内１６Ａに設置して回収カゴ２３に集積させて回収する。The paint cake of the present invention is individually divided into a solvent and a non-adhesive paint scrap made of fine bubbles made by alkaline ion cleaning agent (Japanese Patent Application No. 2008-155953) with fine bubbles made by the function of the Venturi of the wet painting booth. For example, the method of collecting the levitated and separated is performed as follows. The non-tacky paint scraps are collected by collecting a screen type solid-liquid separator (manufactured by Tsurumi Pump), which is often used for collecting leftover rice, etc., in the circulating water tank 16A and accumulating in the collection basket 23.

溶剤については、循環水槽内１６Ａに設置したスクリーン式固液分離装置（ツルミポンプ製）などで不粘着化した塗料クズを集積回収中にスクリーンバー１８の目から通過した溶剤を循環水槽内１７Ｂに浮上油回収フロート２４を設置し旭化成せんい（株）製（ユーテック）２７などの油水分離装置を用いて回収する方法と一般的に広範囲で認知されている油吸着材を使用する。例えば、Ｃ−マット（（株）ユウホウ製）などを用いて浮上している溶剤の上に乗せ吸着させて回収する。As for the solvent, the solvent that passed through the eyes of the screen bar 18 during the collection and recovery of the paint waste that has become non-sticky by a screen-type solid-liquid separator (manufactured by Tsurumi Pump) installed in the circulating water tank 16A floats to the circulating water tank 17B. A method of collecting oil using an oil / water separator such as Asahi Kasei Fibers Co., Ltd. (Utec) 27 and an oil adsorbing material generally recognized in a wide range are used. For example, a C-mat (manufactured by Yuho Co., Ltd.) or the like is used to be placed on a solvent that has been levitated and adsorbed for recovery.

浄化された循環水を一旦別タンクに一定量を引き抜いて有機物の分解能力に優れたバイオ生剤マイクローブを用いて生分解処理を２４時間〜７日間掛けて行うか、又は、既設の廃水処理設備に排出して有機物の分解能力に優れたバイオ生剤マイクローブを用いて生分解処理を行えばヘキサン値、ＢＯＤ値、ＣＯＤ値などを低減させて下水道などに排出することができる。Once the purified circulating water is withdrawn into a separate tank, a biodegradable microlobe with excellent biodegradability can be used for biodegradation treatment for 24 hours to 7 days, or existing wastewater treatment If the biodegradation treatment is performed using the bio-biomedical microlobe which is discharged to the facility and has an excellent ability to decompose organic substances, the hexane value, BOD value, COD value, etc. can be reduced and discharged to the sewer.

本発明は、地球規模で問題化している環境対策をこれまで個別分野として扱われてきた浄化剤・回収方法・バイオ処理方法の一体型の湿式塗装ブース循環水の浄化システムを実現したものである。塗料滓の回収浄化をアルカリイオン水性洗浄剤（特願２００８−１５５９５３）固有のきめ細かな気泡を湿式塗装ブースのベンチュリーの機能によって超微粒子化した気泡で溶剤と不粘着化させた塗料クズとに個別に分離させて液面へと浮上分離させることによって、塗料滓を効率良く回収できる。又、浄化された循環水は有機物の分解能力に優れたバイオ生剤マイクローブ微生物を用いてヘキサン値、ＢＯＤ値、ＣＯＤ値などを生分解処理させる事ができるので下水道などに排出することができる。The present invention realizes an integrated wet paint booth water purification system for purifiers, recovery methods, and bio-treatment methods, which has been treated as a separate field for environmental measures that have become a global problem. . Collecting and purifying paint slag separately for fine particles unique to alkali ion aqueous cleaner (Japanese Patent Application No. 2008-155953) made into fine particles by the function of the Venturi of the wet paint booth and solvent-free paint waste It is possible to efficiently collect the paint soot by separating it to the liquid level and separating it. In addition, purified circulated water can be biodegraded with hexane, BOD, COD, etc. using a bio-bioactive microbe microorganism with excellent organic matter decomposing ability, so it can be discharged into sewers. .

実施形態１の塗料滓の浮上分離浄化方法で、それに使用する湿式塗装ブースの説明断面図である。It is explanatory drawing sectional drawing of the wet painting booth used for the floating separation | floating separation purification method of the paint fountain of Embodiment 1. FIG. 循環水槽内の塗料滓にアルカリイオン水性洗浄剤（特願２００８−１５５９５３）を注入し循環後に溶剤と不粘着化した塗料クズとに個別に浮上する様子を表した説明断面図である。It is explanatory sectional drawing showing a mode that the alkaline ionized aqueous cleaning agent (Japanese Patent Application No. 2008-155953) was inject | poured into the paint fountain in a circulating water tank, and it floated separately to the solvent and the non-adhesive coating waste after circulation. 循環水槽内の塗料滓が溶剤と不粘着化した塗料クズとに個別に浮上分離し、その不粘着化した塗料クズを回収する一体型の湿式塗装ブース循環水の浄化システムの説明断面図である。FIG. 4 is a cross-sectional view of an integrated wet paint booth circulating water purification system in which paint slag in a circulating water tank floats and separates separately into a solvent and non-tacked paint debris and collects the non-tacky paint debris. . 浄化された循環水からは、カルボン酸といわれる有機酸を多く検出することができる。その内訳は蟻酸・酢酸・プロピオン酸・酪酸・乳酸・吉草酸等であるが、その発生原因の多くは塗料中に含まれる物質が循環水中で加水分解や有機酸発酵などにより生成されると考えられる水質分析データー１である。A large amount of organic acid called carboxylic acid can be detected from the purified circulating water. The breakdown is formic acid, acetic acid, propionic acid, butyric acid, lactic acid, valeric acid, etc., but most of the causes are thought to be generated by hydrolysis or organic acid fermentation in circulating water. Water quality analysis data 1 to be obtained. 塗装前処理工程の脱脂洗浄工程に使用されているアルカリイオン水性洗浄剤（特願２００８−１５５９５３）の廃液を湿式塗装ブースの循環水槽内に再利用した循環水４００ｌを別タンクに引き抜き後に塗装前処理工程で使用されている脱脂用アルカリイオン水性洗浄剤（特願２００８−１５５９５３）の廃液４００ｌを循環水に補充し、引き抜いた循環水４００ｌを微生物生分解処理を２４時間行なった水質分析データー１−１である。Before painting after drawing 400 l of circulating water, which is reused in the circulating water tank of the wet painting booth, from the waste water of the alkaline ion aqueous cleaner (Japanese Patent Application No. 2008-155953) used in the degreasing washing process of the pre-painting process. Water quality analysis data 1 in which 400 l of waste water of alkaline ion detergent for degreasing (Japanese Patent Application No. 2008-155953) used in the treatment process was replenished to the circulating water, and 400 l of the extracted circulating water was subjected to microbial biodegradation treatment for 24 hours -1. 浮上分離させて溶剤と不粘着化した塗料クズとに個別に回収し浄化された循環水を図５のデーター１−１の微生物生分解処理を更に７日間行なったデーター１−２である。FIG. 5 is data 1-2 in which the microbial biodegradation treatment of data 1-1 in FIG. 5 was further performed for 7 days on the circulating water separately collected and purified by the floated and separated solvent and non-adhesive paint waste. 循環水の原水と微生物生分解処理を７日間行なって水質浄化の低減度を比較したデーター１−３である。It is data 1-3 which compared the reduction degree of water purification by performing the raw water of circulating water and microbial biodegradation processing for 7 days.

１ スプレーガン
２ 塗料ミスト
３ 排気ファン
４ 散水スプレーノズル
５ ウォーターカーテン水
６ 不粘着化した塗料クズ
７ 溶剤
８ 液面
９ 微細な気泡
１０ 被塗装物
１１ 循環水槽
１２ フィルター
１３ 循環ポンプ
１４ ベンチュリー
１５ 仕切り板
１６ 循環水槽 Ａ
１７ 循環水槽 Ｂ
１８ スクリーンバー
１９ 掻揚げ爪
２０ 回転モーター
２１ 走行チェーン
２２ 架台
２３ 塗料クズ回収カゴ
２４ 浮上油回収フロート
２５ 循環ポンプ
２６ プレフィルター
２７ 油水分離装置
２８ 電磁弁
２９ 浄化液
３０ 回収溶剤DESCRIPTION OF SYMBOLS 1 Spray gun 2 Paint mist 3 Exhaust fan 4 Sprinkling spray nozzle 5 Water curtain water 6 Non-adhesive paint scrap 7 Solvent 8 Liquid level 9 Fine bubble 10 Object 11 Circulating water tank 12 Filter 13 Circulating pump 14 Venturi 15 Partition plate 16 Circulating water tank A
17 Circulating water tank B
18 Screen Bar 19 Raising Claw 20 Rotating Motor 21 Traveling Chain 22 Base 23 Paint Waste Scrap Recovery Basket 24 Floating Oil Recovery Float 25 Circulating Pump 26 Prefilter 27 Oil Water Separator 28 Solenoid Valve 29 Purifying Liquid 30 Recovery Solvent

Claims (4)

湿式塗装ブース循環水に塗料ミストが取り込まれてなる塗料滓を除去する方法であって、水を原料としてイオン化させた水にメタケイ酸ナトリウムを添加したアルカリイオン水性洗浄剤を湿式塗装ブースの循環水に含有させた状態で循環ポンプを稼働させ、ベンチュリーの機能によって循環水中に超微粒子化した気泡を発生させ、該気泡により塗料滓を溶剤と不粘着化した塗料クズとに個別に気泡分離させて液面へと浮上分離させることを含む、塗料滓の除去方法。 A method of removing paint flocculate comprising paint mist is taken into the wet paint spray booth circulating water, circulating water of the wet paint booth alkali ions aqueous detergent water was added sodium metasilicate in water was ionized as a raw material The circulation pump is operated in a state of being contained in the liquid, and bubbles are formed into ultrafine particles in the circulating water by the function of the venturi, and the bubbles are individually separated into the solvent and the non-adhesive paint debris by the bubbles. A method for removing paint soot, including floating and separating to a liquid surface. 塗装前処理として被塗装物の脱脂洗浄工程に使用された前記アルカリイオン水性洗浄剤の廃液を湿式塗装ブースの循環水槽内に再利用することを含む、請求項１記載の方法。 The method of Claim 1 including reusing the waste liquid of the said alkaline ion aqueous cleaning agent used for the degreasing cleaning process of the to- be-coated article in the circulating water tank of a wet painting booth as a pre-painting process. 浮上分離して発生した溶剤と不粘着化した塗料クズを回収することをさらに含む請求項１又は２記載の方法。 Further comprising process according to claim 1 or 2 and recovering the levitation separated solvent and tack paint debris generated by. 溶剤と不粘着化した塗料クズとを液面へと個別に浮上分離させて回収し浄化された循環水に対し、微生物による生分解処理を行ない、循環水中の有機物質含量を低減させることをさらに含む、請求項３記載の方法。 To Solvent and tack was a paint debris by individually flotation into the liquid surface the collected clarified circulating water, subjected to biodegradation treatment by microorganisms, Rukoto reduce organic matter content of the circulating water The method of claim 3, further comprising:
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