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Apparatus for treating waste water for plating preprocessing process and processing method

A wastewater treatment and pretreatment technology, applied in metallurgical wastewater treatment, water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problem of recovery and reuse or removal of peracid and metal salt or metal ion and other issues to achieve the effect of improving the quality of electroplating and reducing the cost of electroplating

Inactive Publication Date: 2008-08-20
三元金属株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the existing electroplating process, the method of recovering and reusing or removing the acid and metal salt or metal ion contained in the electroplating wastewater has never been considered

Method used

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  • Apparatus for treating waste water for plating preprocessing process and processing method
  • Apparatus for treating waste water for plating preprocessing process and processing method

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Experimental program
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Embodiment Construction

[0030] figure 1 Schematically, in order to remove foreign matter such as oil stains on the plated object to facilitate future electroplating, surface activation, waste water treatment for pickling process or activation process, and a waste water treatment device suitable for pretreatment process. This pretreatment wastewater treatment device is composed of a buffer tank 10 and a primary filter device 20 , a secondary filter device 30 , a 3rd filter device 40 , and a 4th filter device 50 .

[0031] According to the flow of the pickling process and the metal activation process of the object to be plated, the first washing tank 1a, the second washing tank 1b and the third washing tank 1c of the washing tank 1 are sequentially composed. The third washing tank 1c is located on the water supply side for supplying the replenishing liquid, and waste water moves sequentially to the first washing tank 1a through the third washing tank 1c and the second washing tank 1b. Therefore, the p...

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PUM

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Abstract

The invention relates to a wastewater treatment device and a method during the process of plating pretreatment. The wastewater treatment method of the plating pretreatment process comprises the followings steps: overflowing the turbid wastewater in a descaling bath and a rinsing tank during the metal activation into a buffer pool, concentrating the wastewater after three times of filtering, using the high-purity filtrate obtained from the concentration process as a replenishing solution, and recovering and recycling high-purity treating liquid obtained after the metal salt, metal ion and other impurities have been removed from the concentrated solution, so as to save both water and water expense. Then, the high-purity acid with the metal ions removed is recycled to save plating cost; and harmful wastewater is not drained for fear of polluting river water. Moreover, the thorough water quality management is carried out to improve the quality of electric plating.

Description

technical field [0001] The present invention relates to a kind of waste water (washing water) treatment device and treatment method of electroplating pretreatment process, as the pretreatment stage in the electroplating process, the waste water used when pickling or activating the metal surface is treated, will be used as The filtrate of the waste water is reused to remove the metal ions in the acid waste water and reuse it, so as to reduce the cost of electroplating, prevent river water pollution by not discharging harmful waste water, conduct thorough water quality management, and improve the quality of electroplating. Background technique [0002] In the electroplating process, in the pretreatment process of pickling the plated object or activating the surface, sulfuric acid, hydrochloric acid, inorganic acid and other strong acids are generally used as treatment agents. Pickling the object to be electroplated with strong acid to activate the surface, if the acid remainin...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/58C02F1/66C02F1/42C02F103/16
Inventor 金准植
Owner 三元金属株式会社
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