JPH05330265A - Surface treatment of aluminum support for printing plate - Google Patents

Surface treatment of aluminum support for printing plate

Info

Publication number
JPH05330265A
JPH05330265A JP16675392A JP16675392A JPH05330265A JP H05330265 A JPH05330265 A JP H05330265A JP 16675392 A JP16675392 A JP 16675392A JP 16675392 A JP16675392 A JP 16675392A JP H05330265 A JPH05330265 A JP H05330265A
Authority
JP
Japan
Prior art keywords
water
surface treatment
waste
washing
discharged
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
JP16675392A
Other languages
Japanese (ja)
Inventor
Hiroshi Fukuda
浩史 福田
Akio Uesugi
彰男 上杉
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP16675392A priority Critical patent/JPH05330265A/en
Publication of JPH05330265A publication Critical patent/JPH05330265A/en
Pending legal-status Critical Current

Links

Landscapes

  • Printing Plates And Materials Therefor (AREA)

Abstract

PURPOSE:To effectively utilize waste water by a method wherein the waste solution discharged from a surface treatment process is adjusted in its pH to be neutralized and water is subsequently separated from impurities to be reutilized as a part or all of the washing water of a washing process. CONSTITUTION:The alkaline waste water and acidic waste water discharged from washing tanks 3-9 and the waste acid solution 13 and waste alkali solution 14 discharged from respective surface treatment processes are sent to a pH adjusting tank 15 and subsequently sent to a flocculation and sedimentation tank 16 to separate insoluble components such as aluminum hydroxide or pumice. The obtained water is mixed with industrial water/fresh water 10 as primary reutilization water 11 if necessary to be reutilized as the washing water of the washing tanks 3-9. A part of the primary reutilization water 11 is sent to a reverse osmosis membrane device 18 to further remove insoluble components and the obtained water is reused in the washing tanks 3-9 as secondary reutilization water 19.

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、印刷版用アルミニウム
板の表面処理方法に関し、表面処理工程から排出される
廃水から水を回収し、再利用することに関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface treatment method for an aluminum plate for a printing plate, and more particularly to recovering and reusing water from waste water discharged from the surface treatment step.

【0002】[0002]

【従来の技術】平版印刷版用アルミニウム板の表面処理
方法には多様な処理液が用いられている。例えば、化学
的にアルミニウムをエッチングする工程では水酸化ナト
リウム、電気化学的に粗面化する工程では硝酸あるいは
塩酸、また陽極酸化工程では硫酸が一般的に用いられて
いる。
2. Description of the Related Art Various processing liquids are used for the surface treatment method of an aluminum plate for a lithographic printing plate. For example, sodium hydroxide is generally used in the step of chemically etching aluminum, nitric acid or hydrochloric acid in the step of electrochemically roughening the surface, and sulfuric acid in the step of anodizing.

【0003】一方、平版印刷版用支持体としては、アル
ミニウム板、又はアルミニウム合金板が用いられてお
り、上述の処理液中のアルミニウムイオン濃度によって
大きく処理後の表面形状などが異なり、アルミニウムイ
オン濃度が印刷版用アルミニウム支持体の品質に及ぼす
影響は大きい。そのため、処理液中のアルミニウムイオ
ン濃度は所定の濃度に一定に保つことが重要であり、そ
のために処理系内の処理液の一部を系外に排出し廃液を
中和し、工場外へ排出している。
On the other hand, as a support for a lithographic printing plate, an aluminum plate or an aluminum alloy plate is used, and the surface shape after the treatment largely varies depending on the aluminum ion concentration in the above-mentioned treatment liquid. Has a great influence on the quality of the aluminum support for printing plates. For this reason, it is important to keep the aluminum ion concentration in the treatment liquid constant at a predetermined concentration.To this end, a portion of the treatment liquid in the treatment system is discharged to the outside of the system to neutralize the waste liquid and then discharged to outside the factory. is doing.

【0004】また各表面処理後、アルミニウム支持体に
処理液の一部が付着していると処理ムラなどの品質故障
が発生するため、各処理槽のあとには水洗槽が設けられ
大量の工業用水を用いてアルミニウム支持体に付着した
処理液を洗い流している。近年工業用水は、地下水の汲
み上げ制限などにより不足しているが、上述の工場外へ
排出されている排水には、硫酸イオンや硝酸イオンなど
が含有されているためそのまま表面処理工程への工業用
水としての再利用はできない。
Further, after each surface treatment, if a part of the treatment liquid adheres to the aluminum support, quality troubles such as treatment unevenness occur. Therefore, a washing tank is provided after each treatment tank and a large amount of industrial water is provided. The treatment liquid adhering to the aluminum support is washed away with water. In recent years, industrial water is in short supply due to restrictions such as the pumping of groundwater, but the wastewater discharged outside the above-mentioned factory contains sulfate ions and nitrate ions, etc. Cannot be reused.

【0005】特開平1−200992号公報では処理液
中のアルミニウムイオン濃度を一定に保つため、処理液
を電気透析槽に通してイオン交換膜から構成される電気
透析により処理液中のアルミニウムイオンを分離しアル
ミニウム塩として系外に排出している。この場合も各表
面処理後、アルミニウム支持体に処理液の一部が付着し
て処理ムラなどの品質故障の発生するのを防止するため
に各処理槽のあとには水洗槽を設け、大量の工業用水を
用いてアルミニウム支持体に付着していた処理液を洗い
流す。発生した水洗廃水はそのまま表面処理工程への工
業用水としての再利用はできず、廃液処理を行い中和し
て工場外へ排出される。
In JP-A-1-200992, in order to keep the concentration of aluminum ions in the treatment liquid constant, the treatment liquid is passed through an electrodialysis tank and the aluminum ions in the treatment liquid are removed by electrodialysis consisting of an ion exchange membrane. Separated and discharged as aluminum salt out of the system. Also in this case, after each surface treatment, a washing tank is installed after each treatment tank in order to prevent a part of the treatment liquid from adhering to the aluminum support and causing a quality failure such as uneven treatment. Rinse the treatment liquid adhering to the aluminum support with industrial water. The generated washing wastewater cannot be reused as it is as industrial water for the surface treatment process, but is treated as a waste liquid, neutralized, and discharged outside the factory.

【0006】[0006]

【発明が解決しようとする課題】平版印刷版用アルミニ
ウム板の表面処理工程から多量に排出される廃水を表面
処理工程に有効な工業用水として再利用することはコス
トダウンや環境保全から重要な課題である。
It is an important subject from the viewpoint of cost reduction and environmental conservation to reuse waste water discharged in large amounts from the surface treatment process of an aluminum plate for a lithographic printing plate as industrial water effective in the surface treatment process. Is.

【0007】[0007]

【課題を解決するための手段】本発明者らは鋭意研究努
力した結果、上記課題は本発明によって解決することが
できた。すなわち、印刷版用アルミニウム支持体の表面
処理工程から排出されるアルカリ性廃液あるいは酸性廃
液をpH調整して中和する表面処理方法において、中和
した廃液を水と不純物に分離し、水を水洗工程の水洗水
の全量あるいは一部として再利用することを特徴とする
印刷版用アルミニウム支持体の表面処理方法である。
As a result of earnest research efforts by the present inventors, the above problems could be solved by the present invention. That is, in the surface treatment method of neutralizing the alkaline waste liquid or the acidic waste liquid discharged from the surface treatment step of the aluminum support for a printing plate by adjusting the pH, the neutralized waste fluid is separated into water and impurities, and the water is washed with water. The method for surface treatment of an aluminum support for a printing plate is characterized in that all or part of the washing water is reused.

【0008】本発明において上記印刷版用アルミニウム
支持体の表面処理工程からの中和した廃液から不純物を
分離し水を回収する手段としては凝集沈澱法による方法
が推奨される。また、廃液から凝集沈殿法にて不純物を
分離した後、次にその上澄液をフィルターに通してさら
に細かい不溶解成分を取り除いた後、水洗槽の水洗水な
どとして水を回収する方法が好ましい。
In the present invention, a method by a coagulating precipitation method is recommended as a means for separating impurities from the neutralized waste liquid from the surface treatment step of the aluminum support for a printing plate and recovering water. Moreover, after separating impurities from the waste liquid by the coagulation sedimentation method, the supernatant is then passed through a filter to remove finer insoluble components, and then water is preferably collected as washing water in a washing tank. ..

【0009】本発明において上記印刷版用アルミニウム
支持体の表面処理工程からの中和した廃液から不純物を
分離し回収された水の電気伝導度は2ms/cm以下で
あることが望ましい。また上記表面処理工程からの中和
した廃液から不純物を分離し回収された水中の硫酸イオ
ン濃度は600mg/リットル未満であることが望まし
い。さらにまた、上記表面処理工程からの中和した廃液
から不純物を分離し回収された水中の硝酸イオン濃度は
500mg/リットル未満であることが望ましい。
In the present invention, it is desirable that the electric conductivity of the water recovered by separating impurities from the neutralized waste liquid from the surface treatment step of the above-mentioned aluminum support for printing plates is 2 ms / cm or less. Further, it is desirable that the concentration of sulfate ion in the water recovered by separating impurities from the neutralized waste liquid from the surface treatment step is less than 600 mg / liter. Furthermore, it is desirable that the concentration of nitrate ion in the water recovered by separating impurities from the neutralized waste liquid from the surface treatment step is less than 500 mg / liter.

【0010】図1は、本発明の平版印刷版用アルミニウ
ム支持体の表面処理工程において、上述の表面処理方法
による、アルミニウム板の表面処理を行う装置の構成概
略図である。また図2は本発明の表面処理を行う装置の
フローを示すブロック図である。図1によって本発明の
表面処理方法の一具体例を説明する。但し、本発明は本
実施例によって制限されるものではない。
FIG. 1 is a schematic diagram showing the construction of an apparatus for surface-treating an aluminum plate by the above-mentioned surface-treating method in the surface-treating step of an aluminum support for a lithographic printing plate according to the present invention. FIG. 2 is a block diagram showing the flow of the apparatus for performing the surface treatment of the present invention. A specific example of the surface treatment method of the present invention will be described with reference to FIG. However, the present invention is not limited to this embodiment.

【0011】図1において、各水洗槽(3)〜(9)に
て排出されるアルカリ性廃水あるいは酸性廃水および各
表面処理工程から排出される廃酸(13)、廃アルカリ
液(14)はpH調整槽(15)にて中和し、その後凝
集沈澱槽(16)にて水酸化アルミニウム、パミスなど
の不溶解成分を取り除き、1次再利用水(11)とし
て、必要に応じて工業用水(10)の新鮮水と混合し、
各水洗槽(3)〜(9)にて水洗水として使用される。
また1次再利用水(11)の一部を逆浸透膜装置(1
8)によりさらに不溶解成分を除去し2次再利用水(1
9)として水洗槽(3)〜(9)にて使用される。
In FIG. 1, the alkaline wastewater or acidic wastewater discharged from each of the water washing tanks (3) to (9) and the waste acid (13) and waste alkali liquid (14) discharged from each surface treatment step have pH values. Neutralization in the adjusting tank (15) is followed by removal of insoluble components such as aluminum hydroxide and pumice in the coagulating sedimentation tank (16) as primary reuse water (11), and industrial water ( Mix with 10) fresh water,
Used as washing water in each of the washing tanks (3) to (9).
In addition, part of the primary reused water (11) is supplied to the reverse osmosis membrane device (1
Insoluble components are further removed by 8) and secondary reuse water (1
It is used in the washing tanks (3) to (9) as 9).

【0012】[0012]

【実施例】上記図1に示した配置の装置により、下記の
条件で廃水の回収を行いながらアルミニウム板の表面処
理を行った。 水洗廃水、廃酸、廃アルカリ 排水量 8.5m3 /分 同 電導度 3000μs/cm 同 硝酸イオン濃度 1200mg/リットル 同 硫酸イオン濃度 1500mg/リットル 同 固形物濃度 1500mg/リットル 1次再利用水 流 量 5 m3 /分 同 電導度 1800μs/cm 同 硝酸イオン濃度 350mg/リットル 同 硫酸イオン濃度 500mg/リットル 同 固形物濃度 5mg/リットル 2次再利用水 流 量 2.9m3 /分 同 電導度 200μs/cm 同 硝酸イオン濃度 50mg/リットル 同 硫酸イオン濃度 5.0mg/リットル未満 同 固形物濃度 1mg/リットル未満
EXAMPLE A surface treatment of an aluminum plate was carried out by collecting waste water under the following conditions with the apparatus arranged as shown in FIG. Washing wastewater, waste acid, waste alkali Drainage amount 8.5 m 3 / min Same conductivity 3000 μs / cm Same nitrate ion concentration 1200 mg / liter Same sulfate ion concentration 1500 mg / liter Same solid concentration 1500 mg / liter Primary reuse water flow amount 5 m 3 / min Same conductivity 1800 μs / cm Same nitrate ion concentration 350 mg / liter Same sulfate ion concentration 500 mg / liter Solid matter concentration 5 mg / liter Secondary reuse water flow rate 2.9 m 3 / min Same conductivity 200 μs / cm Same nitrate ion concentration 50 mg / liter Same sulfate ion concentration less than 5.0 mg / liter Solid matter concentration less than 1 mg / liter

【0013】[0013]

【発明の効果】その結果従来廃水として放流していた廃
水をより効率的に工業的に利用できる水に変質し、再利
用できるようになり、環境保全、製品のコストダウン上
に大きく貢献した。
As a result, the wastewater conventionally discharged as wastewater can be more efficiently converted into industrially usable water and can be reused, which greatly contributes to environmental protection and product cost reduction.

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

【図1】本発明のアルミニウム板の表面処理を行う装置
の構成概略図
FIG. 1 is a schematic configuration diagram of an apparatus for surface-treating an aluminum plate according to the present invention.

【図2】本発明のアルミニウム板の表面処理を行う装置
のフローを示すブロック図
FIG. 2 is a block diagram showing the flow of an apparatus for surface-treating an aluminum plate according to the present invention.

【符号の説明】[Explanation of symbols]

1 アルミニウム板 2 パスロール 3〜9 水洗槽 10 工業用水 11 1次再利用水 12 水洗排水 13 廃酸 14 廃アルカリ 15 pH調整槽 16 凝集沈殿槽 17 廃水ポンプ 18 逆浸透膜装置 19 2次再利用水 DESCRIPTION OF SYMBOLS 1 Aluminum plate 2 Pass roll 3-9 Water washing tank 10 Industrial water 11 Primary reuse water 12 Washing drainage 13 Waste acid 14 Waste alkali 15 pH adjusting tank 16 Coagulation sedimentation tank 17 Waste water pump 18 Reverse osmosis membrane device 19 Secondary reuse water

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 印刷版用アルミニウム支持体の表面処理
工程から排出されるアルカリ性廃液あるいは酸性廃液を
pH調整して中和する表面処理方法において、中和した
廃液を水と不純物に分離し、水を水洗工程の水洗水の全
量あるいは一部として再利用することを特徴とする印刷
版用アルミニウム支持体の表面処理方法。
1. In a surface treatment method for neutralizing an alkaline waste liquid or an acidic waste liquid discharged from a surface treatment step of an aluminum support for a printing plate by adjusting the pH, the neutralized waste liquid is separated into water and impurities, and water is added. Is reused as a whole amount or a part of washing water in the washing step, and a surface treatment method for an aluminum support for a printing plate.
JP16675392A 1992-06-03 1992-06-03 Surface treatment of aluminum support for printing plate Pending JPH05330265A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16675392A JPH05330265A (en) 1992-06-03 1992-06-03 Surface treatment of aluminum support for printing plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16675392A JPH05330265A (en) 1992-06-03 1992-06-03 Surface treatment of aluminum support for printing plate

Publications (1)

Publication Number Publication Date
JPH05330265A true JPH05330265A (en) 1993-12-14

Family

ID=15837103

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16675392A Pending JPH05330265A (en) 1992-06-03 1992-06-03 Surface treatment of aluminum support for printing plate

Country Status (1)

Country Link
JP (1) JPH05330265A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013107380A (en) * 2011-10-28 2013-06-06 Fujifilm Corp Method and apparatus for manufacturing lithography plate support
JP2016030250A (en) * 2014-07-30 2016-03-07 三菱重工業株式会社 Wastewater treatment system, and wastewater treatment method using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013107380A (en) * 2011-10-28 2013-06-06 Fujifilm Corp Method and apparatus for manufacturing lithography plate support
JP2016030250A (en) * 2014-07-30 2016-03-07 三菱重工業株式会社 Wastewater treatment system, and wastewater treatment method using the same

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