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A kind of electroplating wastewater film recycling pretreatment method

A technology of electroplating wastewater and membrane recovery, which is applied in metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., to ensure the effect of flocculation and sedimentation, improve membrane fouling, and prevent membrane fouling. Effect

Active Publication Date: 2016-01-20
厦门金越电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide a method for the recovery and pretreatment of electroplating wastewater film. Through the improvement of the existing process flow, on the one hand, the amount of chemicals added can be reduced, and on the other hand, the amount of pollutants can be increased. While removing the effect, prevent the problem of membrane fouling in the subsequent membrane recovery treatment

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  • A kind of electroplating wastewater film recycling pretreatment method

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Embodiment 1

[0023] Example 1, see figure 1 Shown, a kind of electroplating wastewater film recovery pretreatment method of the present invention comprises wastewater collection process, pH adjustment process, coagulation treatment process and flocculation treatment process;

[0024] In the waste water collection process, the pretreatment hydrochloric acid plus hydrogen peroxide iron parts activation solution waste liquid is collected in the collection storage pool 11, and quantitatively added to the acid-base waste water pool 12;

[0025] In the pH adjustment process, the pH adjustment tank 13 is added with a concentration of 30% sodium hydroxide solution for automatic adjustment, and the pH value is adjusted to 10-10.5, and the iron-containing activation waste liquid added quantitatively during the waste water collection process is used to activate the Ferric chloride replaces lime powder calcium oxide in the prior art and uses as a weighting agent;

[0026] In the process of coagulatio...

Embodiment 2

[0031] Example 2, see figure 1Shown, a kind of electroplating wastewater film recovery pretreatment method of the present invention comprises wastewater collection process, pH adjustment process, coagulation treatment process and flocculation treatment process;

[0032] In the waste water collection process, the pretreatment hydrochloric acid plus hydrogen peroxide iron parts activation solution waste liquid is collected in the collection storage pool 11, and quantitatively added to the acid-base waste water pool 12;

[0033] In the pH adjustment process, the pH adjustment tank 13 is added with a concentration of 28% sodium hydroxide solution for automatic adjustment, the pH value is adjusted to 10-10.5, and the iron-containing activation waste liquid added quantitatively during the waste water collection process is used Ferric chloride replaces lime powder calcium oxide in the prior art and uses as a weighting agent;

[0034] In the process of coagulation treatment, the proc...

Embodiment 3

[0037] Example 3, see figure 1 Shown, a kind of electroplating wastewater film recovery pretreatment method of the present invention comprises wastewater collection process, pH adjustment process, coagulation treatment process and flocculation treatment process;

[0038] In the waste water collection process, the pretreatment hydrochloric acid plus hydrogen peroxide iron parts activation solution waste liquid is collected in the collection storage pool 11, and quantitatively added to the acid-base waste water pool 12;

[0039] In the pH adjustment process, the pH adjustment tank 13 is added with a concentration of 32% sodium hydroxide solution for automatic adjustment, and the pH value is adjusted to 10-10.5, and the iron-containing activation waste liquid added quantitatively during the waste water collection process is used to activate the Ferric chloride replaces lime powder calcium oxide in the prior art and uses as a weighting agent;

[0040] In the process of coagulatio...

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Abstract

The invention discloses a membrane recovery pre-treatment method for electroplating wastewater. The method comprises a wastewater collection process, a pH adjusting process, a concrete treatment process and a flocculation treatment process, wherein in the flocculation treatment process, a 0.03-0.07% anionic polyacrylamide solution is added into a flocculation basin with the volume ratio of the anionic polyacrylamide solution to the wastewater of 1:(15000-17000), and flocculent precipitation is realized by virtue of co-flocculation of ferric trichloride in an iron-containing activated waste liquid which is quantitatively added in the anionic polyacrylamide and wastewater collection process. By virtue of improvement of an existing process flow, on the one hand, the additive amount of chemicals can be reduced, and on the other hand, the problem of membrane pollution and blockage in the subsequent membrane recovery treatment is solved while the effect of removing pollutants can be improved.

Description

technical field [0001] The invention relates to a method for pretreatment of wastewater, in particular to a method for pretreatment of electroplating wastewater film recovery. Background technique [0002] The wastewater produced by electroplating, such as acid-base wastewater, activation waste liquid, etc., contains a large amount of heavy metal ions, cyanide and organic additives and other highly toxic sundries, which are extremely harmful to the environment and human body and need to be properly disposed of. At present, the commonly used electroplating wastewater treatment methods include electrolysis, biological method and adsorption method, etc., which can make the electroplating wastewater meet the safe discharge standard. Since the electroplating process consumes a lot of water, it is an important measure for the current electroplating enterprises to achieve sustainable development by making the treatment of electroplating wastewater meet the standard of recycling. M...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/44C02F103/16
Inventor 陈仙花陈彩华
Owner 厦门金越电器有限公司