JP4679660B1 - Wastewater treatment equipment that divides the plating process into three systems and recycles the two treated water, RO permeated water or treated pure water generated by these three divided systems - Google Patents

Wastewater treatment equipment that divides the plating process into three systems and recycles the two treated water, RO permeated water or treated pure water generated by these three divided systems Download PDF

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JP4679660B1
JP4679660B1 JP2009264087A JP2009264087A JP4679660B1 JP 4679660 B1 JP4679660 B1 JP 4679660B1 JP 2009264087 A JP2009264087 A JP 2009264087A JP 2009264087 A JP2009264087 A JP 2009264087A JP 4679660 B1 JP4679660 B1 JP 4679660B1
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昌武 加納
鈴男 石黒
豊 倉橋
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株式会社スイレイ
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Abstract

【課題】 メッキ処理工程を三系統に区分し、区分された各処理水の再利用を図る排水処理装置の考え方があった。この三系統により、処理水の処理が簡便であること、また、メッキ処理の品質に好ましい影響を与えること等が挙げられる。しかし、昨今問題となっている。亜鉛メッキの上に、六価クロムメートに代替して、三価クロムメートで被覆するメッキ処理工程において、処理水の再利用を、如何にするかに関しては、明確な方法がなかった。
【解決手段】 本発明は、アルカリ脱脂処理Ａ、及び酸洗脱脂処理Ｂ、並びに電解脱脂処理Ｃの前処理工程（イ）と、亜鉛メッキ処理Ｄ、又は硝酸活性処理Ｅの中間処理工程（ロ）と、第一〜第三の三価クロメート処理Ｆ１〜Ｆ３の後処理工程（ハ）による、各メッキ処理工程を三系統に区分し、この区分された各処理水の再利用を図る排水処理装置であり、処理水の再利用と、上水の節約を図る。
【選択図】 図１−１PROBLEM TO BE SOLVED: To divide a plating treatment process into three systems and to think about a waste water treatment apparatus for reusing each divided treated water. With these three systems, the treatment water can be easily treated, and the quality of the plating treatment can be favorably affected. However, it has become a problem recently. There was no clear method as to how to reuse the treated water in the plating process of coating with trivalent chromate instead of hexavalent chromium on the zinc plating.
The present invention relates to a pretreatment step (A) of an alkaline degreasing treatment A, a pickling degreasing treatment B, and an electrolytic degreasing treatment C, and an intermediate treatment step (b) of a galvanizing treatment D or a nitric acid activation treatment E. ) And the first to third trivalent chromate treatments F1 to F3 post-treatment steps (c), each plating treatment step is divided into three systems, and the wastewater treatment for reusing each of the divided treatment water It is a device that aims to reuse treated water and save water.
[Selection] Figure 1-1

Description

本発明は、金属メッキの主体をなす三価クロムメートを、最終仕上げ処理とするメッキ処理工程において、このメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置に関する。 The present invention divides this plating process into three systems in a plating process in which trivalent chromium mate, which is the main body of metal plating, is used as a final finishing process, and two treated waters generated by the three systems classified. The present invention relates to a wastewater treatment apparatus that reuses permeated water or treated pure water .

従来、メッキ処理を三系統に区分し、この区分された各処理水の再利用を図る排水処理装置の考え方があった。その理由は、この三系統により、処理水の処理が簡便であること、また、メッキ処理の品質に好ましい影響を与えること（不純物の持込の減少化、及び／又は、不純物の処理水への混入防止が図れること）、等が挙げられる。   Conventionally, there has been a concept of a wastewater treatment apparatus that divides plating treatment into three systems and reuses the separated treated water. The reason is that the treatment of treated water is simple due to these three systems, and it has a positive influence on the quality of the plating treatment (reduction in the introduction of impurities and / or impurities into treated water). Prevention of mixing) and the like.

しかしながら、昨今問題となっている。所謂、亜鉛メッキの上に、六価クロムメートに代替して、三価クロムメートで被覆するメッキ処理工程において、処理水の再利用を、如何にするかに関しては、明確な方法がなかった。   However, it has become a problem recently. There is no clear method for reusing the treated water in a plating process in which a so-called zinc plating is used instead of hexavalent chromium and coated with trivalent chromium.

上に鑑み、本発明は、以下のことを意図して、メッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置を提案する。［一］ 表面処理工程より有害物質を含んだ排水（処理水）を、この表面処理工程にリターンし、安全、かつこの工程に適する処理水として利用すること（その他の前処理工程と、後処理工程も同じ）、又は、不純物（油、界面活性剤）の本槽への持込みをなくすこと、［二］ また、亜鉛メッキ処理の中間処理工程と、三価クロメート処理の後処理工程において、有害金属の回収と、再利用を図ること、［三］ さらに、亜鉛メッキ処理の中間処理工程において、界面活性剤、金属キレート剤の微量成分の堆積を回避すること、［四］ 原則として、ＰＨ値の変動を回避し、油分遊離の回避と、品質の向上と、後処理の容易化、迅速化を図ること、等である。 In view of the above, the present invention divides the plating process into three systems with the intention of the following , and reuses the two treated waters, the RO permeated water or the treated pure water generated in the divided three systems. We propose a wastewater treatment system that can [I] Wastewater (treated water) containing harmful substances from the surface treatment process is returned to this surface treatment process and used as treated water that is safe and suitable for this process (other pretreatment processes and post-treatments) The process is the same), or no impurities (oil, surfactant) are brought into the main tank, [2] Also harmful in the intermediate treatment process of galvanization and the post-treatment process of trivalent chromate treatment Recovery and reuse of metals [3] Furthermore, avoid the accumulation of trace components of surfactants and metal chelating agents in the intermediate treatment process of galvanization, [4] In principle, PH value And avoiding oil release, improving quality, and facilitating and speeding up post-processing.

そこで、本発明が意図する前記［一］〜［四］に関する先行文献を、以下、説明する。   Therefore, prior art documents related to [1] to [4] intended by the present invention will be described below.

文献（１）は、特開平１１−３１０９００号の「二次成形品の電気亜鉛メッキ（めっきをメッキに統一する）法」であって、明細書の［００５８］の記載の如く、「カップ形状の二次加工品である鉄鋼部品に電気亜鉛メッキを行う際に、各工程において個別的に大気蒸発装置を用いて、この各工程の処理水のリサイクルを行うことで、処理系全体としてリサイクル・クローズド化を行ったことを特徴とし」、これによって、明細書の［００６５］に記載の如く、「水補給量を、従来は、２０００〜５０００ｌ／ｄａｙを、２００〜５００ｌ／ｄａｙとほぼ１／１０にまで低減し、かつ排水量を、略ゼロとするとともに、その補給水は、蒸発による損失を補給するが、極めて、微々であること、また、油の回収量が４〜５ｋｇ／ｄａｙ、また硫酸第１鉄・７水和物の回収量も１〜２ｋｇ／ｄａｙとなる特徴がある」。しかし、この発明では、各工程において個別的に大気蒸発装置を用いることが条件であることから、通常のメッキ処理には、採用できない構造である。一方、この発明では、「処理系全体としてリサイクル・クローズド化を行える特徴」を有するが、一定の条件下に於いての使用であり、利用範囲に限定があると考えられる。   Document (1) is “Electrogalvanization of secondary molded product (unification of plating into plating)” in Japanese Patent Application Laid-Open No. 11-310900, and as described in [0058] of the specification, When electrogalvanizing steel parts, which are secondary processed products of the above, by recycling the treated water in each process using an air evaporation device individually in each process, the entire processing system can be recycled. Thus, as described in [0065] of the specification, “the amount of water replenishment is conventionally 1/2000 to 5000 l / day, 200 to 500 l / day, approximately 1 / The amount of drainage is reduced to 10 and the amount of drainage is made substantially zero, and the makeup water replenishes the loss due to evaporation, but it is extremely small, and the amount of oil recovered is 4-5 kg / day, Sulfur Recovery of ferrous heptahydrate also has the characteristic that a 1-2 kg / day ". However, in this invention, since it is a condition that an atmospheric evaporation apparatus is individually used in each process, it is a structure that cannot be adopted for a normal plating process. On the other hand, the present invention has the “feature that allows the entire processing system to be recycled and closed”, but it is used under certain conditions and is considered to have a limited range of use.

また、文献（２）は、特開２００３−３０６７９９の「アルカリ性亜鉛系電気めっき方法」であって、明細書の［００１０］の記載の如く、水洗水のアルカリを硫酸で、また、硫酸又は硫酸の酸性塩をアルカリで、それぞれ中和した後、水酸化鉄、水酸化亜鉛等の不純物を濾過し、この中和水を高濃度の硫酸アルカリ塩を含有したまま循環水洗水として再利用するか、又は循環水洗水中に含有される硫酸アルカリ塩及び不純物を定期的に分離除去し、その限度以上に増加するのを抑える。そして、この各水洗工程毎に中和処理し循環させる場合の循環水洗水のＰＨ設定は、ＰＨ４〜６とし、また、酸洗後の循環水洗水では、ＰＨ９〜１１が望ましく、さらに、電解洗浄後の循環水洗水では、ＰＨ８〜１１以下が望ましい。尚、経済性と装置の簡略化等を意図し、前処理水洗水のうちの２工程又は３工程の水洗水を一緒にして中和し循環水洗水とするとともに、この循環水洗水のＰＨ設定は、ＰＨ９〜１０とする」。また、この発明の実施例において、［００１８］ の記載の如く、「実施例１では、本発明を上記の浴を使用して脱脂→水洗（２段）→酸洗→水洗（２段）→電解洗浄→水洗（２段）→めっきの処理方法で実施した。」と開示されている。この発明の特徴は、ＰＨ調整した循環水洗水を、水洗水として再利用することであり、排水の削減と、低コスト化を意図する。しかし、この発明では、各循環水洗水のＰＨ調整を、それぞれ個別にする構造であり、手間及び／又は経験を要すること、構造が複雑となること、等の問題を抱えている。   Reference (2) is an “alkaline zinc-based electroplating method” disclosed in Japanese Patent Application Laid-Open No. 2003-306799. As described in [0010] of the specification, the alkali of the washing water is sulfuric acid, and sulfuric acid or sulfuric acid is used. After neutralizing each acid salt with an alkali, impurities such as iron hydroxide and zinc hydroxide are filtered, and this neutralized water can be reused as circulating washing water while containing high-concentration alkali sulfate. Or, the alkaline sulfate and impurities contained in the circulating wash water are periodically separated and removed, and the increase beyond the limit is suppressed. And the PH setting of the circulating flush water in the case of neutralizing and circulating each of the respective flush steps is PH4-6, and in the circulating flush water after pickling, PH9-11 is desirable. In the subsequent circulating flush water, PH 8-11 or less is desirable. In addition, in order to simplify the economy and equipment, etc., the washing water of the two or three steps of the pretreated washing water is neutralized together to make the circulating washing water, and the PH setting of this circulating washing water is set. Is PH9-10. " Further, in the embodiment of the present invention, as described in [0018], “In the first embodiment, the present invention is performed using the above-described bath for degreasing → water washing (two stages) → acid washing → water washing (two stages) → Electrolytic cleaning → water washing (two steps) → plating treatment method ”. A feature of the present invention is that the circulating flush water adjusted in pH is reused as flush water, which is intended to reduce drainage and reduce costs. However, the present invention has a structure in which the PH adjustment of each circulating flush water is individually performed, and has problems such as requiring labor and / or experience and a complicated structure.

文献（３）は、特開平６−３３６７００号の「貴金属シアン浴めっき廃水及び水洗水の処理方法」であって、明細書の［００１０］の記載の如く、「電解処理後の処理水は、ポンプによりバッチタンクと電解処理槽間を循環させ、一定時間処理を行った後、イオン交換樹脂で脱塩し、再び水洗水として工程で再利用する。貴金属シアン浴メッキ廃水及び水洗水を処理し、貴金属の回収、シアン・有機物の分解を同時に行い、かつクローズドシステムにおいて処理水を水洗水として再利用する」。しかし、この発明では、バッチタンクと電解処理槽間の循環と、所定時間処理し、その後、イオン交換樹脂で脱塩する構造であり、手間及び／又は時間を要する等の問題を抱えており、また、貴金属シアン浴メッキ廃水という所定の廃水に採用できる構造であり、この限定された分野での発明と考えられる。   Document (3) is “Method for treating precious metal cyanogen bath plating waste water and washing water” in JP-A-6-336700, and as described in [0010] of the specification, “treated water after electrolytic treatment is: The pump is circulated between the batch tank and the electrolytic treatment tank, treated for a certain period of time, desalted with ion-exchange resin, and reused as washing water in the process.Precious metal cyanogen bath plating wastewater and washing water are treated. "Recovering precious metals, decomposing cyanide and organic substances at the same time, and reusing treated water as washing water in a closed system." However, in the present invention, the circulation between the batch tank and the electrolytic treatment tank, the treatment for a predetermined time, and then desalting with an ion exchange resin have problems such as labor and / or time required, Moreover, it is a structure that can be adopted for a predetermined wastewater called noble metal cyan bath plating wastewater, and is considered to be an invention in this limited field.

特開平１１−３１０９００号JP-A-11-310900 特開２００３−３０６７９９JP 2003-306799 A 特開平６−３３６７００号JP-A-6-336700

以上の文献（１）〜（３）は、クローズドシステムにおいて、処理水を水洗水として再利用することを意図する。しかし、この文献（１）〜（３）では、限定条件と、不具合があり、本発明が意図する、前記［一］〜［四］を、十分に達成するには、改良の余地がある。   The above documents (1) to (3) are intended to reuse treated water as flush water in a closed system. However, in the documents (1) to (3), there are limitations and problems, and there is room for improvement in order to sufficiently achieve the above [1] to [4] intended by the present invention.

請求項１の発明は、メッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置を提案する。そして、［一］ 表面処理工程より有害物質を含んだ排水（処理水）を、この表面処理工程にリターンし、安全、かつこの工程に適する処理水として利用すること（その他の前処理工程と、後処理工程も同じ）、又は、不純物（油、界面活性剤）の本槽への持込みをなくすこと、［二］ また、亜鉛メッキ処理の中間処理工程と、三価クロメート処理の後処理工程において、有害金属の回収と、再利用を図ること、［三］ さらに、亜鉛メッキ処理の中間処理工程において、界面活性剤、金属キレート剤の微量成分の堆積を回避すること、［四］ 原則として、ＰＨ値の変動を回避し、油分遊離の回避と、品質の向上と、後処理の容易化、迅速化を図ること、等を意図する。 The invention of claim 1 proposes a wastewater treatment apparatus that divides the plating process into three systems and recycles the two treated waters, the RO permeated water, or the treated pure water generated in the divided three systems . [1] Wastewater (treated water) containing harmful substances from the surface treatment process is returned to this surface treatment process and used as treated water that is safe and suitable for this process (other pretreatment processes, The same is applied to the post-treatment process), or eliminating impurities (oil, surfactant) into the main tank, [2] In addition, in the intermediate treatment process of galvanization and the post-treatment process of trivalent chromate treatment , Recovery and reuse of toxic metals, [3] Furthermore, avoid the accumulation of trace amounts of surfactants and metal chelating agents in the intermediate treatment process of galvanization, [4] In principle, It is intended to avoid fluctuations in PH value, avoid oil release, improve quality, facilitate post-processing, and speed up.

請求項１は、前処理工程（イ）は、アルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）で、また、中間処理工程（ロ）は、亜鉛メッキ処理（Ｄ）で、後処理工程（ハ）は、三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）でなる、メッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
前記アルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）の複数の第一次水洗槽（１）、（３）の水洗で生じ、かつプールされた排水は、配管（４）、（６）を介して、貯留槽（７）に導き、この貯溜槽（７）にプールした排水を、配管ルート（１０）を介して、順次、ＰＨ調整槽（１２）と、凝集槽（１３）と、沈澱装置（１５）及び濾過装置（１６）と、中和槽（１７）に導き、この中和槽（１７）の処理水のＰＨ値を自動制御するＰＩＤ制御装置（１８）を設けるとともに、このＰＨ値が制御された処理水を、前記中和槽（１７）に接続した配管を介してリターン槽（１９）に導き、このリターン槽（１９）の処理水を、戻り配管（２０）を介して、このアルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）の複数の第二次水洗槽（１００）、（３００）にリターンして、再利用可能とする構成とし、
また、前記亜鉛メッキ処理（Ｄ）の第一次水洗槽（２２）の水洗で生じ、かつプールされた排水は、配管を介して、貯留槽（２３）に導き、この貯溜槽（２３）にプールした排水を、配管を介して、順次、ＰＨ調整槽（２４）と、凝集槽（２６）と、沈澱装置（２７）及び濾過装置（２８）と、中和槽（２９）に導き、この中和槽（２９）の処理水のＰＨ値を自動制御するＰＩＤ制御装置（３０）を設けるとともに、このＰＨ値が制御された処理水を、前記中和槽（２９）に接続した配管を介してリターン槽（３２）に導き、このリターン槽（３２）の処理水を、戻り配管（３３）を介して、この亜鉛メッキ処理（Ｄ）の第二次水洗槽（２２００）にリターンして、再利用可能とする構成とし、
さらに、前記三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）の複数の第一次水洗槽（４００００）、（４１０００）、（４２０００）の水洗で生じ、かつプールされた排水は、配管（４４）、（４５）、（４６）を介して、貯留槽（４７）に導き、この貯溜槽（４７）にプールした排水を、配管ルート（４８）を介して、順次、濾過装置（５０）と、ＰＨ調整槽（５１）に導き、このＰＨ調整槽（５１）の処理水のＰＨ値を自動制御するＰＩＤ制御装置（５１ａ）を設けるとともに、このＰＨ値が制御された処理水を、ＲО装置（５２）に導き、このＲО装置（５２）のＲО透過水を、戻り配管（５３）を介して、この三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）の複数の第一次水洗槽（４００００）、（４１０００）、（４２０００）にリターンして、再利用可能とする構成とし、
また、この三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）の第二次水洗槽（４０００１）、（４１００１）、（４２００１）の水洗で生じ、かつプールされた排水は、配管を介して、貯留槽（６４）に導き、この貯留槽（６４）にプールした排水を、配管ルート（６３）を介して、イオン交換装置（６５）に導き、このイオン交換装置（６５）で処理した処理水を、純水槽（６６）に導き、この純水槽（６６）の処理純水を、戻り配管（６７）を介して、この三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）の第二次水洗槽（４０００１）、（４１００１）、（４２００１）にリターンして、再利用可能とする構成とした、
前記メッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置である。 In the first aspect, the pretreatment step (b) is an alkaline degreasing treatment (A) and an electrolytic degreasing treatment (C), and the intermediate treatment step (b) is a galvanizing treatment (D), and a post-treatment step ( C) The trivalent chromate treatments (F1), (F2), and (F3) are divided into three systems, and the two treated waters, RO permeated water or A wastewater treatment device for reusing treated pure water ,
The pooled waste water generated by the water washing in the plurality of primary water washing tanks (1) and (3) in the alkaline degreasing treatment (A) and the electrolytic degreasing treatment (C) is performed by pipes (4) and (6). The waste water pooled in the storage tank (7) and the storage tank (7) is sequentially connected to the PH adjustment tank (12) , the coagulation tank (13), and the settling through the piping route (10). A PID control device (18) for automatically controlling the pH value of the treated water in the neutralization tank (17) is provided to the device (15) and the filtration device (16) and the neutralization tank (17). the treated water value is controlled, the lead to neutralization tank return tank through a pipe connected to the (17) (19), the treated water of the return tank (19), via a return line (20) , A plurality of secondary water washing tanks (100) of this alkaline degreasing treatment (A) and electrolytic degreasing treatment (C ), Return to (300) to make it reusable ,
Moreover, the waste water pooled and drained by the first rinsing tank (22) of the galvanizing treatment (D ) is led to the storage tank (23) through the pipe, and is stored in the storage tank (23). The pooled wastewater is sequentially led to a pH adjusting tank (24) , a coagulation tank (26) , a precipitation device (27) and a filtration device (28), and a neutralization tank (29) through a pipe. A PID control device (30) for automatically controlling the pH value of the treated water in the neutralization tank (29) is provided, and the treated water whose pH value is controlled is supplied through a pipe connected to the neutralization tank (29). led to a return tank (32) Te, the treated water of the return tank (32), via a return pipe (33), and returns to the second water washing tank of the galvanizing process (D) (2200), It is configured to be reusable ,
Furthermore, the drained water which is generated by the water washing in the plurality of primary water washing tanks (40000), (41000) and (42000) of the trivalent chromate treatment (F1), (F2) and (F3) Through (44), (45), (46), the waste water led to the storage tank (47) and pooled in this storage tank (47) is sequentially filtered through the piping route (48) (50). a) leads to the PH adjusting vessel (51), provided with a PID controller for automatically controlling the PH value of the treated water of the PH adjusting vessel (51) (51a), a treated water the PH value is controlled, The RO permeated water of the RO device (52) is guided to the RO device (52) through the return pipe (53), and a plurality of first of the trivalent chromate treatments (F1), (F2), and (F3) are supplied. next washing tank (40000), (41000), (4200 ) To be return, it is configured to be reusable,
In addition, the wastewater pooled and discharged in the secondary water washing tanks (40001), (41001), and (42001) of the trivalent chromate treatments (F1), (F2), and (F3) is discharged via a pipe. Then, the waste water led to the storage tank (64) and pooled in the storage tank (64) is guided to the ion exchange device (65) through the piping route (63) and processed by the ion exchange device (65) . The treated water is guided to the pure water tank (66), and the treated pure water in the pure water tank (66) is supplied to the trivalent chromate treatment (F1), (F2), (F3) through the return pipe (67). Returning to the secondary water washing tank (40001), (41001), (42001) , it was configured to be reusable ,
This is a wastewater treatment apparatus that divides the plating treatment into three systems and reuses the two treated waters, the RO permeated water, or the treated pure water generated in the divided three systems .

請求項２の発明は、請求項１の目的を達成すること、また、この目的を達成するに最適な、後処理工程のＲО装置のＲО濃縮水の処理構造を提案すること、等を意図する。   The invention of claim 2 is intended to achieve the object of claim 1 and to propose a treatment structure for the RO concentrated water of the RO apparatus in the post-treatment process, which is optimal for achieving the object. .

請求項２は、請求項１に記載のメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
前記三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）のＲО装置（５２）のＲО濃縮水を、配管（７０）を介して、貯留槽（７１）に導き、この貯留槽（７１）のＲО濃縮水を、配管ルート（７２）を介して、ＰＨ調整槽（７３）と、凝集槽（７４）と、沈澱装置（７５）及び濾過装置（７６）と、中和槽（７７）に導き、この中和槽（７７）の処理水のＰＨ値を自動制御するＰＩＤ制御装置（７７ａ）を設けるとともに、このＰＨ値が制御された放流処理水を、放流する構成としたメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置である。 Claim 2 divides the plating treatment according to claim 1 into three systems, and a wastewater treatment apparatus that recycles two treated waters, RO permeated water, or treated pure water generated by the divided three systems. Because
The RO concentrated water of the RO device (52) of the trivalent chromate treatment (F1), (F2), (F3 ) is led to the storage tank (71) through the pipe (70), and this storage tank (71) The RO concentrated water was passed through the piping route (72) into the PH adjustment tank (73), the coagulation tank (74), the precipitation device (75) and the filtration device (76), and the neutralization tank (77). In addition, a PID control device (77a) for automatically controlling the pH value of the treated water in the neutralization tank (77) is provided, and the plating treatment is configured to discharge the treated water whose pH value is controlled. This is a wastewater treatment device that is divided into systems and that recycles the two treated waters, RO permeated water, or treated pure water generated in the three divided systems.

請求項３の発明は、請求項１の目的を達成すること、また、この目的を達成するに最適な、中間処理工程の第一次水洗槽にプールされた排水の処理構造を提案すること、等を意図する。   The invention of claim 3 achieves the object of claim 1 and proposes a treatment structure for wastewater pooled in the primary washing tank of the intermediate treatment step, which is optimal for achieving this object. Is intended.

請求項３は、請求項１に記載のメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
前記三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）のＲＯ装置（５２）のＲО濃縮水を、配管（７０）を介して、貯溜槽（７１）に導き、この貯溜槽（７１）のＲО濃縮水に、ポンプ制御を介して、上水（８０）を定量供給可能とする構成としたメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置である。 Claim 3 divides the plating treatment according to claim 1 into three systems, and a wastewater treatment device for reusing the two treated waters, RO permeated water or treated pure water generated by the divided three systems. Because
The RO concentrated water of the RO device (52) of the trivalent chromate treatment (F1), (F2), (F3) is led to the storage tank (71) through the pipe (70), and this storage tank (71) The plating process is configured to be able to supply a fixed amount of clean water (80) to the concentrated water of RO through pump control, and is divided into three systems, and two treated waters generated in these three systems, This is a wastewater treatment device that recycles permeated water or treated pure water .

請求項４の発明は、請求項１の目的を達成すること、また、この目的を達成するに最適な、前処理工程に、付加した酸洗脱脂処理における排水の処理構造を提案すること、等を意図する。   The invention of claim 4 achieves the object of claim 1 and proposes a wastewater treatment structure in the pickling and degreasing process added to the pretreatment process, which is optimal for achieving this object, etc. Intended.

請求項４は、請求項１に記載のメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
前記アルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）の間に、酸洗脱脂処理（Ｂ）を行う構成であり、この構成において、このアルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）の水洗で生ずる排水に、酸洗脱脂処理（Ｂ）の水洗で生ずる排水を付加する構成としたメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置である。 Claim 4 divides the plating treatment according to claim 1 into three systems, and a wastewater treatment apparatus for reusing the two treated waters, the RO permeated water or the treated pure water generated by the divided three systems. Because
Between the alkaline degreasing treatment (A) and the electrolytic degreasing treatment (C), the pickling degreasing treatment (B) is performed. In this configuration, the alkaline degreasing treatment (A) and the electrolytic degreasing treatment (C) are performed. the wastewater produced in the washing, the configuration and the plating process of adding wastewater produced by washing of the pickling degreasing (B) are divided into three classes, two of the treated water generated in this segmented three classes, RO transmission This is a wastewater treatment device that recycles water or treated pure water .

請求項５の発明は、請求項１の目的を達成すること、また、この目的を達成するに最適な、中間処理工程に、付加した硝酸活性処理における排水の処理構造を提案すること、等を意図する。   The invention of claim 5 achieves the object of claim 1 and proposes a treatment structure for wastewater in the nitric acid activation process added to the intermediate treatment step, which is optimal for achieving this object. Intended.

請求項５は、請求項１に記載のメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
前記亜鉛メッキ処理（Ｄ）の後に、硝酸活性処理（Ｅ）を行う構成であり、この構成において、この亜鉛メッキ処理（Ｄ）の水洗で生ずる排水に、硝酸活性処理（Ｅ）の水洗で生ずる排水を付加する構成としたメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置である。 Claim 5 divides the plating treatment according to claim 1 into three systems, and a wastewater treatment apparatus for reusing the two treated waters, the RO permeated water or the treated pure water generated by the divided three systems. Because
After the galvanizing treatment (D), the nitric acid activation treatment (E) is performed. In this configuration, the effluent generated by the rinsing of the zinc plating treatment (D) is generated by the rinsing of the nitric acid activation treatment (E). This is a wastewater treatment apparatus that divides the plating treatment with a configuration to add wastewater into three systems and reuses the two treated waters, the RO permeated water, or the treated pure water generated in the three divided systems.

請求項６の発明は、請求項５の目的を達成すること、また、この目的を達成するに最適な、中間処理工程の水洗槽と、前処理工程の第一次水洗槽とにプールされた排水を、一度の処理する構造を提案すること、等を意図する。 The invention according to claim 6 is pooled in a water washing tank for an intermediate treatment process and a primary water washing tank for a pretreatment process, which are optimal to achieve the object of claim 5 and to achieve this object. It is intended to propose a structure that treats wastewater once.

請求項６は、請求項５に記載のメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
前記硝酸活性処理（Ｅ）の水洗槽（３４）の排水に、上水（８０）を、ポンプ制御を介して、供給可能し、この上水（８０）を加えた排水と、前記アルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｂ）の第一次水洗槽（１）、（３）の水洗で生ずる排水とを、配管を介して、貯留槽（７）に導く構成としたメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置である。 Claim 6 divides the plating treatment according to claim 5 into three systems, and a wastewater treatment apparatus for reusing two treated waters, RO permeated water or treated pure water generated by the three systems divided Because
The drainage of the water washing tank (34) of the nitric acid activation treatment (E) can be supplied with clean water (80) via pump control, the drainage with the clean water (80) added, and the alkaline degreasing treatment (A) and electrolytic degreasing treatment (B) primary water washing tank (1), the plating treatment which made the structure which guides the waste_water | drain produced by the water washing of (3) to the storage tank (7) via piping. This is a wastewater treatment device that is divided into systems and that recycles the two treated waters, RO permeated water, or treated pure water generated in the three divided systems.

請求項１の発明は、前処理工程（イ）は、アルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）で、また、中間処理工程（ロ）は、亜鉛メッキ処理（Ｄ）で、後処理工程（ハ）は、三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）でなる、メッキ処理を三系統に区分し、区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
アルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）の複数の第一次水洗槽（１）、（３）の水洗で生じ、かつプールされた排水は、配管（４）、（６）を介して、貯留槽（７）に導き、貯溜槽（７）にプールした排水を、配管ルート（１０）を介して、順次、ＰＨ調整槽（１２）と、凝集槽（１３）と、沈澱装置（１５）及び濾過装置（１６）と、中和槽（１７）に導き、中和槽（１７）の処理水のＰＨ値を自動制御するＰＩＤ制御装置（１８）を設けるとともに、ＰＨ値が制御された処理水を、中和槽（１７）に接続した配管を介してリターン槽（１９）に導き、リターン槽（１９）の処理水を、戻り配管（２０）を介して、アルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）の複数の第二次水洗槽（１００）、（３００）にリターンして、再利用可能とする構成とし、
また、亜鉛メッキ処理（Ｄ）の第一次水洗槽（２２）の水洗で生じ、かつプールされた排水は、配管を介して、貯留槽（２３）に導き、貯溜槽（２３）にプールした排水を、配管を介して、順次、ＰＨ調整槽（２４）と、凝集槽（２６）と、沈澱装置（２７）及び濾過装置（２８）と、中和槽（２９）に導き、中和槽（２９）の処理水のＰＨ値を自動制御するＰＩＤ制御装置（３０）を設けるとともに、ＰＨ値が制御された処理水を、中和槽（２９）に接続した配管を介してリターン槽（３２）に導き、リターン槽（３２）の処理水を、戻り配管（３３）を介して、亜鉛メッキ処理（Ｄ）の第二次水洗槽（２２００）にリターンして、再利用可能とする構成とし、
さらに、三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）の複数の第一次水洗槽（４００００）、（４１０００）、（４２０００）の水洗で生じ、かつプールされた排水は、配管（４４）、（４５）、（４６）を介して、貯留槽（４７）に導き、貯溜槽（４７）にプールした排水を、配管ルート（４８）を介して、順次、濾過装置（５０）と、ＰＨ調整槽（５１）に導き、ＰＨ調整槽（５１）の処理水のＰＨ値を自動制御するＰＩＤ制御装置（５１ａ）を設けるとともに、ＰＨ値が制御された処理水を、ＲО装置（５２）に導き、ＲО装置（５２）のＲО透過水を、戻り配管（５３）を介して、三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）の複数の第一次水洗槽（４００００）、（４１０００）、（４２０００）にリターンして、再利用可能とする構成とし、
また、三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）の第二次水洗槽（４０００１）、（４１００１）、（４２００１）の水洗で生じ、かつプールされた排水は、配管を介して、貯留槽（６４）に導き、貯留槽（６４）にプールした排水を、配管ルート（６３）を介して、イオン交換装置（６５）に導き、イオン交換装置（６５）で処理した処理水を、純水槽（６６）に導き、純水槽（６６）の処理純水を、戻り配管（６７）を介して、三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）の第二次水洗槽（４０００１）、（４１００１）、（４２００１）にリターンして、再利用可能とする構成とした、
メッキ処理を三系統に区分し、区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置である。 In the first aspect of the invention, the pretreatment step (A) is an alkaline degreasing treatment (A) and an electrolytic degreasing treatment (C), and the intermediate treatment step (B) is a galvanizing treatment (D). Process (c) consists of trivalent chromate treatment (F1), (F2), and (F3). The plating treatment is divided into three systems, and two treated waters produced by the three systems, RO permeate Or a wastewater treatment device for reusing treated pure water ,
The pooled waste water generated by the water washing in the plurality of primary water washing tanks (1) and (3) in the alkaline degreasing treatment (A) and the electrolytic degreasing treatment (C) is performed through the pipes (4) and (6). Then, the waste water pooled in the storage tank (7) and pooled in the storage tank (7) is sequentially supplied through the piping route (10) to the PH adjustment tank (12) , the coagulation tank (13), and the precipitation device ( 15) and a filtration device (16) and a PID control device (18) for automatically controlling the pH value of the treated water in the neutralization vessel (17), which is led to the neutralization vessel (17), and the PH value is controlled. The treated water is guided to the return tank (19) through a pipe connected to the neutralization tank (17), and the treated water in the return tank (19) is subjected to alkaline degreasing treatment (A) through the return pipe (20). ) and a plurality of second water washing tank of the electrolytic degreasing (C) (100), and returns to (300), re It is configured to be usable ,
In addition, drained water generated and pooled in the primary rinsing tank (22) of the galvanizing treatment (D ) is led to the storage tank (23) through the pipe and pooled in the storage tank (23). The drainage is sequentially led to a pH adjusting tank (24) , a coagulation tank (26) , a precipitation device (27) and a filtering device (28), and a neutralization tank (29) through a pipe. The PID control device (30) for automatically controlling the pH value of the treated water of (29) is provided, and the treated water whose pH value is controlled is returned to the return tank (32 through a pipe connected to the neutralization tank (29). ) to lead, the treated water return tank (32), via a return pipe (33), and returns to the second water washing tank of galvanized (D) (2200), and configured to be reusable ,
Furthermore, the wastewater pooled in the trivalent chromate treatments (F1), (F2), (F3) in the plurality of primary water washing tanks (40000), (41000), (42000) 44), (45), (46) to the storage tank (47), and the wastewater pooled in the storage tank (47) is sequentially connected to the filtration device (50) via the piping route (48). , A PID control device (51a) for automatically controlling the pH value of the treated water in the PH adjusting tank (51) is provided to the PH adjusting tank (51), and the treated water whose pH value is controlled is supplied to the RO device (52 The RO permeated water of the RO device (52) is passed through the return pipe (53), and the trivalent chromate treatments (F1), (F2), (F3) are subjected to a plurality of primary water washing tanks (40000). , (41000), and return to (42000), reuse With a configuration that can be used ,
In addition, the wastewater pooled and discharged from the secondary water washing tanks (40001), (41001), and (42001) of the trivalent chromate treatments (F1), (F2), and (F3) is discharged via a pipe. The waste water that has been guided to the storage tank (64) and pooled in the storage tank (64) is guided to the ion exchange device (65) via the piping route (63), and treated water that has been treated by the ion exchange device (65). The secondary water washing tank of the trivalent chromate treatment (F1), (F2), (F3) is led to the pure water tank (66) and the treated pure water of the pure water tank (66) is passed through the return pipe (67). Returning to (40001), (41001), and (42001) , it is configured to be reusable .
This is a wastewater treatment apparatus that divides the plating process into three systems and reuses the two treated waters, the RO permeated water, or the treated pure water generated in the divided three systems .

従って、請求項１は、メッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置を提案することで、次のような特徴がある。［一］ 表面処理工程より有害物質を含んだ排水（処理水）を、この表面処理工程にリターンし、安全、かつこの工程に適する処理水として利用できること（その他の前処理工程と、後処理工程も同じ）、又は、不純物（油、界面活性剤）の本槽への持込みをなくし得ること、［二］ また、亜鉛メッキ処理の中間処理工程と、三価クロメート処理の後処理工程において、有害金属の回収と、再利用が図れること、［三］ さらに、亜鉛メッキ処理の中間処理工程において、界面活性剤、金属キレート剤の微量成分の堆積を回避できること、［四］ 原則として、ＰＨ値の変動を回避し、油分遊離の回避と、品質の向上と、後処理の容易化、迅速化が図れること、等である。 Accordingly, claim 1 proposes a wastewater treatment apparatus that divides the plating process into three systems and reuses the two treated waters, the RO permeated water, or the treated pure water generated by the three divided systems. And there are the following features. [1] Wastewater (treated water) containing harmful substances from the surface treatment process can be returned to the surface treatment process and used as treated water that is safe and suitable for this process (other pretreatment processes and post-treatment processes) The same), or the removal of impurities (oil, surfactant) into the main tank, [2] In addition, it is harmful in the intermediate treatment process of galvanization and the post-treatment process of trivalent chromate treatment. Metal recovery and reuse [3] Furthermore, it is possible to avoid the deposition of trace components of surfactants and metal chelating agents in the intermediate treatment process of galvanization, [4] In principle, the PH value These include avoiding fluctuations, avoiding oil release, improving quality, facilitating and speeding up post-processing, and the like.

請求項２の発明は、請求項１に記載のメッキ処理を三系統に区分し、区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）のＲО装置（５２）のＲО濃縮水を、配管（７０）を介して、貯留槽（７１）に導き、貯留槽（７１）のＲО濃縮水を、配管ルート（７２）を介して、ＰＨ調整槽（７３）と、凝集槽（７４）と、沈澱装置（７５）及び濾過装置（７６）と、中和槽（７７）に導き、中和槽（７７）の処理水のＰＨ値を自動制御するＰＩＤ制御装置（７７ａ）を設けるとともに、ＰＨ値が制御された放流処理水を、放流する構成としたメッキ処理を三系統に区分し、区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置である。 The invention of claim 2 divides the plating treatment according to claim 1 into three systems, and a wastewater treatment for reusing the two treated waters, RO permeated water or treated pure water generated by the divided three systems. A device,
The RO concentrated water of the RO device (52) of the trivalent chromate treatment (F1), (F2), (F3 ) is led to the storage tank (71) through the pipe (70), and the RO of the storage tank (71) is introduced. Concentrated water is led to the PH adjustment tank (73), the coagulation tank (74), the precipitation device (75) and the filtration device (76), and the neutralization tank (77) via the piping route (72). The PID control device (77a) that automatically controls the pH value of the treated water in the neutralization tank (77) is provided, and the plating treatment is configured to discharge the treated water with controlled pH value into three systems. This is a wastewater treatment device that recycles two treated water, RO permeated water, or treated pure water generated in three divided systems.

従って、請求項２は、請求項１の目的を達成できること、また、この目的を達成するに最適な、後処理工程のＲО装置のＲО濃縮水の処理構造を提案できること、等の特徴を有する。   Therefore, claim 2 has the characteristics that the object of claim 1 can be achieved, and that a structure for treating the RO concentrated water of the RO apparatus in the post-treatment process can be proposed, which is optimal for achieving the object.

請求項３の発明は、請求項１に記載のメッキ処理を三系統に区分し、区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）のＲＯ装置（５２）のＲО濃縮水を、配管（７０）を介して、貯溜槽（７１）に導き、貯溜槽（７１）のＲО濃縮水に、ポンプ制御を介して、上水（８０）を定量供給可能とする構成としたメッキ処理を三系統に区分し、区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置である。 The invention of claim 3 divides the plating treatment according to claim 1 into three systems, and a wastewater treatment for reusing the two treated waters, RO permeated water or treated pure water generated by the divided three systems. A device,
The RO concentrated water of the RO device (52) of the trivalent chromate treatment (F1), (F2), (F3) is led to the storage tank (71) through the pipe (70), and the RO of the storage tank (71) is introduced. The plating process is designed to make it possible to supply clean water (80) quantitatively to the concentrated water via pump control . The plating process is divided into three systems, and the two treated waters generated by the three systems, RO permeated water. Alternatively, it is a wastewater treatment device for reusing treated pure water .

従って、請求項３は、請求項１の目的を達成できること、また、この目的を達成するに最適な、中間処理工程の第一次水洗槽にプールされた排水の処理構造を提案できること、等の特徴を有する。   Therefore, Claim 3 can achieve the object of Claim 1, and can propose a treatment structure for wastewater pooled in the primary washing tank of the intermediate treatment process, which is optimal for achieving this object. Has characteristics.

請求項４の発明は、請求項１に記載のメッキ処理を三系統に区分し、区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
アルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）の間に、酸洗脱脂処理（Ｂ）を行う構成であり、構成において、アルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）の水洗で生ずる排水に、酸洗脱脂処理（Ｂ）の水洗で生ずる排水を付加する構成としたメッキ処理を三系統に区分し、区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置である。 According to a fourth aspect of the present invention, the plating treatment according to the first aspect is divided into three systems, and the wastewater treatment for reusing the two treated waters, the RO permeated water or the treated pure water generated by the divided three systems. A device,
Between the alkaline degreasing process (A) and the electrolytic degreasing process (C), the pickling degreasing process (B) is performed. In the configuration, the alkaline degreasing process (A) and the electrolytic degreasing process (C) are performed by washing with water. The plating process is configured to add the wastewater generated by the pickling and degreasing treatment (B) to the wastewater, and is divided into three systems . Two treated waters, RO permeated water or pure treated This is a wastewater treatment device that recycles water.

従って、請求項４は、請求項１の目的を達成できること、また、この目的を達成するに最適な、前処理工程に、付加した酸洗脱脂処理における排水の処理構造を提案できること、等の特徴を有する。   Therefore, claim 4 can achieve the object of claim 1 and can propose a wastewater treatment structure in the pickling and degreasing process added to the pretreatment process that is optimal for achieving this object. Have

請求項５の発明は、請求項１に記載のメッキ処理を三系統に区分し、区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
亜鉛メッキ処理（Ｄ）の後に、硝酸活性処理（Ｅ）を行う構成であり、構成において、亜鉛メッキ処理（Ｄ）の水洗で生ずる排水に、硝酸活性処理（Ｅ）の水洗で生ずる排水を付加する構成としたメッキ処理を三系統に区分し、区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置である。 The invention of claim 5 divides the plating treatment according to claim 1 into three systems, and a wastewater treatment for reusing the two treated waters, RO permeated water or treated pure water generated by the divided three systems. A device,
In this configuration, nitric acid activation treatment (E) is performed after galvanization treatment (D), and in the configuration, wastewater generated by washing with nitric acid activation treatment (E) is added to wastewater generated by washing with zinc plating treatment (D). This is a wastewater treatment apparatus that divides the plating treatment configured as described above into three systems and reuses the two treated waters, RO permeated water, or treated pure water generated in the divided three systems .

従って、請求項５は、請求項１の目的を達成できること、また、この目的を達成するに最適な、中間処理工程に、付加した硝酸活性処理における排水の処理構造を提案できること、等の特徴を有する。   Therefore, claim 5 can achieve the object of claim 1, and can propose a wastewater treatment structure in the nitric acid activation treatment added to the intermediate treatment step, which is optimal to achieve this object. Have.

請求項６は、請求項５に記載のメッキ処理を三系統に区分し、区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
硝酸活性処理（Ｅ）の水洗槽（３４）の排水に、上水（８０）を、ポンプ制御を介して、供給可能し、上水（８０）を加えた排水と、アルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｂ）の第一次水洗槽（１）、（３）の水洗で生ずる排水とを、配管を介して、貯留槽（７）に導く構成としたメッキ処理を三系統に区分し、区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置である。 Claim 6 is a wastewater treatment apparatus that divides the plating treatment according to claim 5 into three systems and reuses the two treated waters, RO permeated water or treated pure water generated by the three divided systems. There,
The drainage of the water washing tank (34) of the nitric acid activation treatment (E) can be supplied with clean water (80) via pump control, drainage with added clean water (80), and alkaline degreasing treatment (A). and primary washing tank of electrolytic degreasing (B) (1), (3) a waste water arising in the washing of, through a pipe, divided into structure and the plating three lines leading to the reservoir (7) The wastewater treatment device is designed to reuse the two treated waters, the RO permeated water, or the treated pure water generated in the three divided systems.

従って、請求項６は、請求項５の目的を達成できること、また、この目的を達成するに最適な、中間処理工程の水洗槽と、前処理工程の第一次水洗槽とにプールされた排水を、一度の処理する構造を提案できること、等の特徴を有する。 Accordingly, claim 6 can achieve the object of claim 5 , and is optimal for achieving this object, and is drained by pooling in a water washing tank in the intermediate treatment process and a primary water washing tank in the pretreatment process. It is possible to propose a structure for processing a single time.

本発明のメッキ処理を三系統に区分し、この区分された各処理水の再利用を図る排水処理装置の全体を半截した前半分の模式図Schematic diagram of the front half that divides the plating treatment of the present invention into three systems and half of the whole waste water treatment equipment that reuses each of the divided treated water 本発明のメッキ処理を三系統に区分し、この区分された各処理水の再利用を図る排水処理装置の全体を半截した後半分の模式図The plating process of the present invention is divided into three systems, and a schematic diagram for the latter half of the entire waste water treatment equipment that recycles each of the divided treated water. 本発明のメッキ処理を三系統に区分し、この区分された前処理工程の処理水の再利用を図る排水処理装置を半截した前半分の模式図Schematic diagram of the front half that divides the plating treatment of the present invention into three systems and half-finishes the waste water treatment equipment that recycles the treated water in the divided pretreatment process. 本発明のメッキ処理を三系統に区分し、この区分された前処理工程の処理水の再利用を図る排水処理装置を半截した後半分の模式図Schematic diagram of the latter half of the wastewater treatment equipment that divides the plating treatment of the present invention into three systems and recycles the treated water in the divided pretreatment process. 本発明のメッキ処理を三系統に区分し、この区分された中間処理工程の処理水の再利用を図る排水処理装置を半截した前半分の模式図Schematic diagram of the first half that divides the plating treatment of the present invention into three systems and half-finishes the wastewater treatment equipment that recycles the treated water in this divided intermediate treatment process 本発明のメッキ処理を三系統に区分し、この区分された中間処理工程の処理水の再利用を図る排水処理装置を半截した後半分の模式図The plating process of the present invention is divided into three systems, and the schematic diagram for the latter half of the wastewater treatment equipment that recycles the treated water in the divided intermediate treatment process. 本発明のメッキ処理を三系統に区分し、この区分された後処理工程の処理水の再利用を図る排水処理装置を半截した前半分の模式図Schematic diagram of the front half that divides the plating treatment of the present invention into three systems and half-finishes the waste water treatment equipment that recycles the treated water in the divided post-treatment process 本発明のメッキ処理を三系統に区分し、この区分された後処理工程の処理水の再利用を図る排水処理装置を半截した後半分の模式図The plating process of the present invention is divided into three systems, and a schematic diagram for the latter half of the wastewater treatment equipment that recycles the treated water in the divided post-treatment process.

本発明は、アルカリ脱脂処理Ａ、及び酸洗脱脂処理Ｂ、並びに電解脱脂処理Ｃの前処理工程（イ）と、亜鉛メッキ処理Ｄ、又は硝酸活性処理Ｅの中間処理工程（ロ）と、第一〜第三の三価クロメート処理Ｆ１〜Ｆ３の後処理工程（ハ）による、各メッキ処理を三系統に区分し、この区分された各処理水の再利用を図る排水処理装置であり、以下、各工程の好ましい一例を説明する。   In the present invention, the alkaline degreasing treatment A, the pickling degreasing treatment B, and the electrolytic degreasing treatment C pretreatment step (a), the galvanizing treatment D or the nitric acid activation treatment E intermediate treatment step (b), It is a wastewater treatment device that divides each plating process into three systems by the post-treatment process (c) of the first to third trivalent chromate treatments F1 to F3, and reuses the separated treated water, A preferred example of each step will be described.

この前処理工程（イ）は、アルカリ脱脂処理Ａ（アルカリ脱脂処理槽）及び酸洗脱脂処理Ｂ（酸洗脱脂処理槽）、並びに電解脱脂処理Ｃ（電解脱脂処理槽）において、それぞれ第一次水洗槽１、２、３を有しており、この第一次水洗槽１、２、３に処理水がプールされる。この第一次水洗槽１、２、３の処理水は、配管４、５、６を介して、纏めて、かつ一時的に貯留槽７にプールされる。この貯留槽７にプールされた処理水は、連結する配管ルート１０を介して、順次、ＰＨ調整槽１２と、凝集槽１３と、沈澱装置１５、及び濾過装置１６と、中和槽１７に送られるとともに、この各過程でＰＨ調整と、清澄水の生成処理が行われる。尚、この中和槽１７のＰＨ値を自動制御するＰＩＤ制御装置１８を設けて、自動的に制御し、かつこの中和槽１７において生成された、所定のＰＨ値（ＰＨ８）となった処理水（清澄水）を、リターン槽１９にプールして、再利用に役立てる。そして、このリターン槽１９の清澄水を、この前処理工程（イ）のアルカリ脱脂処理Ａ、及び酸洗脱脂処理Ｂ、並びに電解脱脂処理Ｃの第二次水洗槽１００〜３００にリターンする戻り配管２０を有する。前記酸洗脱脂処理Ｂは、必要時に設けられるものであり、メッキ物の表面を活性化することで、次の処理でのメッキ処理の向上を図る。また、電解脱脂処理Ｃは、アルカリ脱脂処理Ａでは剥離できなかった、メッキ物の表面金属を溶かし、かつ油を除去して、メッキ物の表面を活性化する。 This pretreatment step (a) is performed in the primary steps in the alkaline degreasing treatment A (alkaline degreasing treatment tank ), the pickling degreasing treatment B (pickling degreasing treatment tank), and the electrolytic degreasing treatment C (electrolytic degreasing treatment tank), respectively. Washing tanks 1, 2, and 3 are provided, and treated water is pooled in the primary washing tanks 1, 2, and 3. The treated water in the primary rinsing tanks 1, 2, and 3 is collectively and temporarily pooled in the storage tank 7 via the pipes 4, 5, and 6. The treated water pooled in the storage tank 7 is sequentially sent to the PH adjustment tank 12, the coagulation tank 13, the precipitation device 15, the filtration device 16, and the neutralization tank 17 through the pipe route 10 to be connected. At the same time, the pH adjustment and the clear water generation process are performed in each process. In addition, the process which provided the PID control apparatus 18 which controls automatically the PH value of this neutralization tank 17, was controlled automatically, and became the predetermined PH value (PH8) produced | generated in this neutralization tank 17 Water (clear water) is pooled in the return tank 19 to be reused. And the return piping which returns the clarified water of this return tank 19 to the secondary water washing tank 100-300 of this alkaline degreasing process A of this pretreatment process (ii), pickling degreasing process B, and electrolytic degreasing process C 20 The pickling degreasing treatment B is provided when necessary, and the plating treatment in the next treatment is improved by activating the surface of the plated product. Further, the electrolytic degreasing treatment C activates the surface of the plated product by dissolving the surface metal of the plated product, which could not be peeled off by the alkaline degreasing treatment A, and removing the oil.

次に、中間処理工程（ロ）は、亜鉛メッキ処理Ｄ（亜鉛メッキ処理槽）から有価金属（亜鉛）を回収する回収槽２１を経由して第一次水洗槽２２にプールされた排水を、纏めて、かつ一時的にプールする貯留槽２３と、ＰＨ調整槽２４と、凝集槽２６と、沈澱装置２７、及び濾過装置２８と、中和槽２９に送られるとともに、この各過程でＰＨ調整と、清澄水の生成処理が行われる。尚、この中和槽２９のＰＨ値を自動制御するＰＩＤ制御装置３０を設けて、自動的に制御し、かつこの中和槽２９において生成された、所定のＰＨ値（ＰＨ８）となった処理水（清澄水）を、リターン槽３２にプールして、再利用に役立てる。そして、このリターン槽３２の清澄水を、この中間処理工程（ロ）の第二次水洗槽２２００にリターンする戻り配管３３を有する。そして、この中間処理工程（ロ）に設けた硝酸活性処理Ｅには、第一次兼第二次用の水洗槽３４に排水を、纏めて、かつ一時的にプールする。   Next, in the intermediate treatment step (b), the drained water pooled in the primary rinsing tank 22 via the recovery tank 21 for recovering valuable metal (zinc) from the galvanizing process D (zinc plating tank), Collected and temporarily pooled storage tank 23, PH adjustment tank 24, agglomeration tank 26, precipitation apparatus 27, filtration apparatus 28, and neutralization tank 29, and PH adjustment in each process Then, a clear water generation process is performed. In addition, the process which provided the PID control apparatus 30 which controls automatically the PH value of this neutralization tank 29, was controlled automatically, and became the predetermined PH value (PH8) produced | generated in this neutralization tank 29 Water (clear water) is pooled in the return tank 32 and used for reuse. And it has the return piping 33 which returns the clarified water of this return tank 32 to the secondary water washing tank 2200 of this intermediate treatment process (b). Then, in the nitric acid activation treatment E provided in the intermediate treatment step (b), the waste water is collected and temporarily pooled in the primary and secondary washing tank 34.

さらに、三価クロメート処理の後処理工程（ハ）は、第一の三価クロメート処理〜第三の三価クロメート処理Ｆ１〜Ｆ３のそれぞれの第一次水洗槽４００００〜４２０００の処理水は、配管４４〜４６を介して、纏めて、かつ一時的に貯留槽４７にプールされる。この貯留槽４７にプールされた処理水は、連結する配管ルート４８を介して、順次、濾過装置５０と、ＰＨ調整槽５１と、ＲО装置５２に送られるとともに、この各過程でＰＨ調整と、清澄水の生成処理が行われる。尚、このＰＨ調整槽５１のＰＨ値を自動制御するＰＩＤ制御装置５１ａを設けて、自動的に制御し、かつこのＰＨ調整槽５１と、ＲО装置５２において生成された、所定のＰＨ値のＰＯ濾過水（清澄水）を、このＲО装置５２にプールして、戻り配管５３を介して、第一次水洗槽４００００〜４２０００に戻して、再利用に役立てる。   Further, the post-treatment step (c) of the trivalent chromate treatment is carried out by treating the treated water in the primary washing tanks 40000 to 42000 of the first trivalent chromate treatment to the third trivalent chromate treatments F1 to F3, respectively Collected and temporarily pooled in the storage tank 47 via 44-46. The treated water pooled in the storage tank 47 is sequentially sent to the filtration device 50, the PH adjustment tank 51, and the RO device 52 via the pipe route 48 to be connected. The production process of clarified water is performed. A PID control device 51a for automatically controlling the PH value of the PH adjustment tank 51 is provided to automatically control the PO value having a predetermined PH value generated in the PH adjustment tank 51 and the RO device 52. The filtered water (clarified water) is pooled in this RO device 52 and returned to the first water washing tank 40000-42000 via the return pipe 53 to be reused.

そして、この三価クロメート処理の後処理工程（ハ）は、第二次水洗槽４０００１〜４２００１にプールされた排水を、配管６０〜６２を介して、纏めて、かつ一時的にプールする。このプールされた処理水は、連結する配管ルート６３を介して、順次、貯留槽６４と、イオン交換装置６５に送られるとともに、このイオン交換装置６５で、純粋水の生成処理が行われる。次の純水槽６６にプールして、戻り配管６７を介して、第二次水洗槽４０００１〜４２００１に戻して、再利用に役立てる。   And the post-processing process (c) of this trivalent chromate process collects the waste_water | drain pooled by the secondary water washing tank 40001-42001 via the piping 60-62, and pools it temporarily. The pooled treated water is sequentially sent to the storage tank 64 and the ion exchange device 65 via the connecting piping route 63, and pure water is generated in the ion exchange device 65. It pools in the following pure water tank 66, returns to the secondary water washing tank 40001-4001 via the return piping 67, and is used for reuse.

また、前記ＲＯ装置５２の濃縮水は、配管７０を介して、纏めて、かつ一時的に貯留槽７１にプールされる。この貯留槽７１にプールされた濃縮水は、連結する配管ルート７２を介して、順次、ＰＨ調整槽７３と、凝集槽７４と、沈澱装置７５、及び濾過装置７６と、中和槽７７に送られるとともに、この各過程でのＰＨ調整を介して、放流水の基準をクリアーした放流対応の処理水（放流処理水）の生成処理が行われる。尚、この中和槽７７のＰＨ値を自動制御するＰＩＤ制御装置７７ａを設けて、自動的に制御し、かつこの中和槽７７において生成された、所定のＰＨ値の放流処理水を、例えば、河川に放流する。   Further, the concentrated water of the RO device 52 is pooled and temporarily pooled in the storage tank 71 via the pipe 70. The concentrated water pooled in the storage tank 71 is sequentially sent to the PH adjustment tank 73, the coagulation tank 74, the precipitation device 75, the filtration device 76, and the neutralization tank 77 via the connecting piping route 72. At the same time, through the pH adjustment in each process, the generation processing of the discharge water corresponding to the discharge water (discharge treatment water) that clears the standard of the discharge water is performed. In addition, the PID control device 77a for automatically controlling the PH value of the neutralization tank 77 is provided to automatically control the discharge treated water having a predetermined PH value generated in the neutralization tank 77, for example. , Release into the river.

そして、本発明では、上水８０を、ポンプ（図示しない）を介して、最少の補給水量とする。例えば、硝酸活性処理Ｅの水洗槽３４にして、三価クロメート処理の後処理工程（ハ）に対する金属処理の弊害解消と、また、ＲО濃縮水の貯留槽７１にして、放流基準の達成に寄与する。そして、望ましくは、水洗槽３４と、貯留槽７１との補給水量を略同じとし、この各メッキ処理工程を三系統に区分された各処理水の効率的な処理と、この処理水とか、純水の再利用、及び／又は、上水８０の節約を図ることを意図する。そして、必要により、上水８０の補給を、三価クロメート処理の後処理工程（ハ）において、第一次水洗槽４００００〜４２０００との中で、所定の槽に行って、金属処理の弊害解消と、また、この各メッキ処理工程を三系統に区分された各処理水の効率的な処理と、この処理水とか、純水の再利用、及び／又は、上水８０の節約を図ることを意図する。   In the present invention, the clean water 80 is set to the minimum amount of makeup water via a pump (not shown). For example, the water washing tank 34 of the nitric acid activation treatment E is used to eliminate the adverse effects of metal treatment on the post-treatment process (c) of the trivalent chromate treatment, and the RO concentrated water storage tank 71 contributes to achievement of the discharge standard. To do. Desirably, the amount of replenishing water in the rinsing tank 34 and the storage tank 71 is substantially the same, and each plating process is divided into three systems. It is intended to reuse water and / or save water 80. And if necessary, replenishment of clean water 80 is performed in a predetermined tank in the primary water washing tanks 40000 to 42000 in the post-treatment step (c) of the trivalent chromate treatment to eliminate the adverse effects of metal treatment. In addition, each plating treatment process is divided into three systems, each treatment water is efficiently treated, this treatment water, pure water is reused and / or water 80 is saved. Intended.

Ａ アルカリ脱脂処理
Ｂ 酸洗脱脂処理
Ｃ 電解脱脂処理
Ｄ 亜鉛メッキ処理
Ｅ 硝酸活性処理
Ｆ１ 第一の三価クロメート処理
Ｆ２ 第二の三価クロメート処理
Ｆ３ 第三の三価クロメート処理
１ 第一次水洗槽
１００ 第二次水洗槽
２ 第一次水洗槽
２００ 第二次水洗槽
３ 第一次水洗槽
３００ 第二次水洗槽
４〜６ 配管
７ 貯留槽
１０ 配管ルート
１２ ＰＨ調整槽
１３ 凝集槽
１５ 沈澱装置
１６ 濾過装置
１７ 中和槽
１８ ＰＩＤ制御装置
１９ リターン槽
２０ 戻り配管
２１ 回収槽
２２ 第一次水洗槽
２２００ 第二次水洗槽
２３ 貯留槽
２４ ＰＨ調整槽
２６ 凝集槽
２７ 沈澱装置
２８ 濾過装置
２９ 中和槽
３０ ＰＩＤ制御装置
３２ リターン槽
３３ 戻り配管
３４ 水洗槽
４００００ 第一次水洗槽
４０００１ 第二次水洗槽
４１０００ 第一次水洗槽
４１００１ 第二次水洗槽
４２０００ 第一次水洗槽
４２００１ 第二次水洗槽
４４〜４６ 配管
４７ 貯留槽
４８ 配管ルート
５０ 濾過装置
５１ ＰＨ調整槽
５１ａ ＰＩＤ制御装置
５２ ＲО装置
５３ 戻り配管
６０〜６２ 配管
６３ 配管ルート
６４ 貯留槽
６５ イオン交換装置
６６ 純水槽
６７ 戻り配管
７０ 配管
７１ 貯留槽
７２ 配管ルート
７３ ＰＨ調整槽
７４ 凝集槽
７５ 沈澱装置
７６ 濾過装置
７７ 中和槽
７７ａ ＰＩＤ制御装置
８０ 上水 A Alkaline degreasing treatment B Pickling degreasing treatment C Electrolytic degreasing treatment D Zinc plating treatment E Nitric acid activation treatment F1 First trivalent chromate treatment F2 Second trivalent chromate treatment F3 Third trivalent chromate treatment 1 Primary water washing Tank 100 Secondary flush tank 2 Primary flush tank 200 Secondary flush tank 3 Primary flush tank 300 Secondary flush tank 4-6 Pipe 7 Storage tank 10 Pipe route 12 PH adjustment tank 13 Coagulation tank 15 Precipitation Device 16 Filtration device 17 Neutralization tank 18 PID control device 19 Return tank 20 Return pipe 21 Collection tank 22 Primary water washing tank 2200 Secondary water washing tank 23 Storage tank 24 PH adjustment tank 26 Coagulation tank 27 Precipitation apparatus 28 Filtration apparatus 29 Neutralization tank 30 PID control device 32 Return tank 33 Return pipe 34 Flush tank 40000 Primary flush tank 40001 Secondary flush tank 41000 Primary flush tank 41001 Secondary flush tank 42000 Primary flush tank 42001 Secondary flush tank 44-46 Piping 47 Storage tank 48 Piping route 50 Filtration device 51 PH adjustment tank 51a PID control device 52 Ro equipment 53 Return piping 60 62 piping 63 piping route 64 storage tank 65 ion exchange device 66 pure water tank 67 return piping 70 piping 71 storage tank 72 piping route 73 PH adjustment tank 74 coagulation tank 75 sedimentation device 76 filtration device 77 neutralization tank 77a PID control device 80 clean water

Claims (6)

前処理工程（イ）は、アルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）で、また、中間処理工程（ロ）は、亜鉛メッキ処理（Ｄ）で、後処理工程（ハ）は、三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）でなる、メッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
前記アルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）の複数の第一次水洗槽（１）、（３）の水洗で生じ、かつプールされた排水は、配管（４）、（６）を介して、貯留槽（７）に導き、この貯溜槽（７）にプールした排水を、配管ルート（１０）を介して、順次、ＰＨ調整槽（１２）と、凝集槽（１３）と、沈澱装置（１５）及び濾過装置（１６）と、中和槽（１７）に導き、この中和槽（１７）の処理水のＰＨ値を自動制御するＰＩＤ制御装置（１８）を設けるとともに、このＰＨ値が制御された処理水を、前記中和槽（１７）に接続した配管を介してリターン槽（１９）に導き、このリターン槽（１９）の処理水を、戻り配管（２０）を介して、このアルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）の複数の第二次水洗槽（１００）、（３００）にリターンして、再利用可能とする構成とし、
また、前記亜鉛メッキ処理（Ｄ）の第一次水洗槽（２２）の水洗で生じ、かつプールされた排水は、配管を介して、貯留槽（２３）に導き、この貯溜槽（２３）にプールした排水を、配管を介して、順次、ＰＨ調整槽（２４）と、凝集槽（２６）と、沈澱装置（２７）及び濾過装置（２８）と、中和槽（２９）に導き、この中和槽（２９）の処理水のＰＨ値を自動制御するＰＩＤ制御装置（３０）を設けるとともに、このＰＨ値が制御された処理水を、前記中和槽（２９）に接続した配管を介してリターン槽（３２）に導き、このリターン槽（３２）の処理水を、戻り配管（３３）を介して、この亜鉛メッキ処理（Ｄ）の第二次水洗槽（２２００）にリターンして、再利用可能とする構成とし、
さらに、前記三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）の複数の第一次水洗槽（４００００）、（４１０００）、（４２０００）の水洗で生じ、かつプールされた排水は、配管（４４）、（４５）、（４６）を介して、貯留槽（４７）に導き、この貯溜槽（４７）にプールした排水を、配管ルート（４８）を介して、順次、濾過装置（５０）と、ＰＨ調整槽（５１）に導き、このＰＨ調整槽（５１）の処理水のＰＨ値を自動制御するＰＩＤ制御装置（５１ａ）を設けるとともに、このＰＨ値が制御された処理水を、ＲО装置（５２）に導き、このＲО装置（５２）のＲО透過水を、戻り配管（５３）を介して、この三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）の複数の第一次水洗槽（４００００）、（４１０００）、（４２０００）にリターンして、再利用可能とする構成とし、
また、この三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）の第二次水洗槽（４０００１）、（４１００１）、（４２００１）の水洗で生じ、かつプールされた排水は、配管を介して、貯留槽（６４）に導き、この貯留槽（６４）にプールした排水を、配管ルート（６３）を介して、イオン交換装置（６５）に導き、このイオン交換装置（６５）で処理した処理水を、純水槽（６６）に導き、この純水槽（６６）の処理純水を、戻り配管（６７）を介して、この三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）の第二次水洗槽（４０００１）、（４１００１）、（４２００１）にリターンして、再利用可能とする構成とした、
前記メッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置。 The pretreatment step (A) is alkali degreasing treatment (A) and electrolytic degreasing treatment (C), the intermediate treatment step (B) is galvanizing treatment (D), and the posttreatment step (C) is three. The plating treatment consisting of trivalent chromate treatments (F1), (F2), and (F3) is divided into three systems, and the two treated waters, RO permeated water or treated pure water generated in these three divided systems are recycled. A wastewater treatment device to be used,
The pooled waste water generated by the water washing in the plurality of primary water washing tanks (1) and (3) in the alkaline degreasing treatment (A) and the electrolytic degreasing treatment (C) is performed by pipes (4) and (6). The waste water pooled in the storage tank (7) and the storage tank (7) is sequentially connected to the PH adjustment tank (12) , the coagulation tank (13), and the settling through the piping route (10). A PID control device (18) for automatically controlling the pH value of the treated water in the neutralization tank (17) is provided to the device (15) and the filtration device (16) and the neutralization tank (17). the treated water value is controlled, the lead to neutralization tank return tank through a pipe connected to the (17) (19), the treated water of the return tank (19), via a return line (20) , A plurality of secondary water washing tanks (100) of this alkaline degreasing treatment (A) and electrolytic degreasing treatment (C ), Return to (300) to make it reusable ,
Moreover, the waste water pooled and drained by the first rinsing tank (22) of the galvanizing treatment (D ) is led to the storage tank (23) through the pipe, and is stored in the storage tank (23). The pooled wastewater is sequentially led to a pH adjusting tank (24) , a coagulation tank (26) , a precipitation device (27) and a filtration device (28), and a neutralization tank (29) through a pipe. A PID control device (30) for automatically controlling the pH value of the treated water in the neutralization tank (29) is provided, and the treated water whose pH value is controlled is supplied through a pipe connected to the neutralization tank (29). led to a return tank (32) Te, the treated water of the return tank (32), via a return pipe (33), and returns to the second water washing tank of the galvanizing process (D) (2200), It is configured to be reusable ,
Furthermore, the drained water which is generated by the water washing in the plurality of primary water washing tanks (40000), (41000) and (42000) of the trivalent chromate treatment (F1), (F2) and (F3) Through (44), (45), (46), the waste water led to the storage tank (47) and pooled in this storage tank (47) is sequentially filtered through the piping route (48) (50). a) leads to the PH adjusting vessel (51), provided with a PID controller for automatically controlling the PH value of the treated water of the PH adjusting vessel (51) (51a), a treated water the PH value is controlled, The RO permeated water of the RO device (52) is guided to the RO device (52) through the return pipe (53), and a plurality of first of the trivalent chromate treatments (F1), (F2), and (F3) are supplied. next washing tank (40000), (41000), (4200 ) To be return, it is configured to be reusable,
In addition, the wastewater pooled and discharged in the secondary water washing tanks (40001), (41001), and (42001) of the trivalent chromate treatments (F1), (F2), and (F3) is discharged via a pipe. Then, the waste water led to the storage tank (64) and pooled in the storage tank (64) is guided to the ion exchange device (65) through the piping route (63) and processed by the ion exchange device (65) . The treated water is guided to the pure water tank (66), and the treated pure water in the pure water tank (66) is supplied to the trivalent chromate treatment (F1), (F2), (F3) through the return pipe (67). Returning to the secondary water washing tank (40001), (41001), (42001) , it was configured to be reusable ,
A wastewater treatment apparatus that divides the plating treatment into three systems and reuses the two treated waters, the RO permeated water, or the treated pure water generated in the divided three systems . 請求項１に記載のメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
前記三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）のＲО装置（５２）のＲО濃縮水を、配管（７０）を介して、貯留槽（７１）に導き、この貯留槽（７１）のＲО濃縮水を、配管ルート（７２）を介して、ＰＨ調整槽（７３）と、凝集槽（７４）と、沈澱装置（７５）及び濾過装置（７６）と、中和槽（７７）に導き、この中和槽（７７）の処理水のＰＨ値を自動制御するＰＩＤ制御装置（７７ａ）を設けるとともに、このＰＨ値が制御された放流処理水を、放流する構成としたメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置。 A wastewater treatment apparatus that divides the plating treatment according to claim 1 into three systems and recycles the two treated waters, the RO permeated water, or the treated pure water generated in the divided three systems ,
The RO concentrated water of the RO device (52) of the trivalent chromate treatment (F1), (F2), (F3 ) is led to the storage tank (71) through the pipe (70), and this storage tank (71) The RO concentrated water was passed through the piping route (72) into the PH adjustment tank (73), the coagulation tank (74), the precipitation device (75) and the filtration device (76), and the neutralization tank (77). In addition, a PID control device (77a) for automatically controlling the pH value of the treated water in the neutralization tank (77) is provided, and the plating treatment is configured to discharge the treated water whose pH value is controlled. Wastewater treatment equipment that divides into two systems and recycles the two treated waters, RO permeated water, or treated pure water generated in the three divided systems. 請求項１に記載のメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
前記三価クロメート処理（Ｆ１）、（Ｆ２）、（Ｆ３）のＲＯ装置（５２）のＲО濃縮水を、配管（７０）を介して、貯溜槽（７１）に導き、この貯溜槽（７１）のＲО濃縮水に、ポンプ制御を介して、上水（８０）を定量供給可能とする構成としたメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置。 A wastewater treatment apparatus that divides the plating treatment according to claim 1 into three systems and recycles the two treated waters, the RO permeated water, or the treated pure water generated in the divided three systems ,
The RO concentrated water of the RO device (52) of the trivalent chromate treatment (F1), (F2), (F3) is led to the storage tank (71) through the pipe (70), and this storage tank (71) The plating process is configured to be able to supply a fixed amount of clean water (80) to the concentrated water of RO through pump control, and is divided into three systems, and two treated waters generated in these three systems, Wastewater treatment equipment that recycles RO permeate or treated pure water . 請求項１に記載のメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
前記アルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）の間に、酸洗脱脂処理（Ｂ）を行う構成であり、この構成において、このアルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｃ）の水洗で生ずる排水に、酸洗脱脂処理（Ｂ）の水洗で生ずる排水を付加する構成としたメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置。 A wastewater treatment apparatus that divides the plating treatment according to claim 1 into three systems and recycles the two treated waters, the RO permeated water, or the treated pure water generated in the divided three systems ,
Between the alkaline degreasing treatment (A) and the electrolytic degreasing treatment (C), the pickling degreasing treatment (B) is performed. In this configuration, the alkaline degreasing treatment (A) and the electrolytic degreasing treatment (C) are performed. the wastewater produced in the washing, the configuration and the plating process of adding wastewater produced by washing of the pickling degreasing (B) are divided into three classes, two of the treated water generated in this segmented three classes, RO transmission Wastewater treatment equipment that reuses water or treated pure water . 請求項１に記載のメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
前記亜鉛メッキ処理（Ｄ）の後に、硝酸活性処理（Ｅ）を行う構成であり、この構成において、この亜鉛メッキ処理（Ｄ）の水洗で生ずる排水に、硝酸活性処理（Ｅ）の水洗で生ずる排水を付加する構成としたメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置。 A wastewater treatment apparatus that divides the plating treatment according to claim 1 into three systems and recycles the two treated waters, the RO permeated water, or the treated pure water generated in the divided three systems ,
After the galvanizing treatment (D), the nitric acid activation treatment (E) is performed. In this configuration, the effluent generated by the rinsing of the zinc plating treatment (D) is generated by the rinsing of the nitric acid activation treatment (E). A wastewater treatment system that divides plating treatment with a configuration to add wastewater into three systems, and reuses the two treated waters, RO permeated water, or treated pure water generated by these three divided systems. 請求項５に記載のメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置であって、
前記硝酸活性処理（Ｅ）の水洗槽（３４）の排水に、上水（８０）を、ポンプ制御を介して、供給可能し、この上水（８０）を加えた排水と、前記アルカリ脱脂処理（Ａ）及び電解脱脂処理（Ｂ）の第一次水洗槽（１）、（３）の水洗で生ずる排水とを、配管を介して、貯留槽（７）に導く構成としたメッキ処理を三系統に区分し、この区分された三系統で生成された二つの処理水、ＲО透過水又は処理純水の再利用を図る排水処理装置。 A wastewater treatment apparatus that divides the plating treatment according to claim 5 into three systems and recycles the two treated waters, the RO permeated water, or the treated pure water generated in the divided three systems ,
The drainage of the water washing tank (34) of the nitric acid activation treatment (E) can be supplied with clean water (80) via pump control, the drainage with the clean water (80) added, and the alkaline degreasing treatment (A) and electrolytic degreasing treatment (B) primary water washing tank (1), the plating treatment which made the structure which guides the waste_water | drain produced by the water washing of (3) to the storage tank (7) via piping. Wastewater treatment equipment that divides into two systems and recycles the two treated waters, RO permeated water, or treated pure water generated in the three divided systems.
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