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Mixed liquid treatment method and recovery method

A treatment method and mixed liquid technology, which is applied in water/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problem of high sulfate content in micro-etching waste liquid, increased evaporation system load, and incomplete removal of heavy metals and other problems, to achieve the effect of reducing the burden of disposal, reducing the concentration of sulfate radicals, and easy operation

Inactive Publication Date: 2021-06-25
深圳市龙岗区东江工业废物处置有限公司
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Problems solved by technology

Due to the high acidity of the micro-etching waste liquid, a large amount of lime or sodium hydroxide is often required for neutralization, and the cost of using chemicals is high; the content of copper ions in the micro-etching waste liquid is high, and the lime neutralization method cannot completely remove the copper ions. The removal of heavy metals is not complete, and the micro-etching waste liquid treated with lime neutralization method has a high sulfate content, which easily disturbs the stability of the system after entering the evaporation system and increases the load of the evaporation system

Method used

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  • Mixed liquid treatment method and recovery method

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] Such as figure 1 Shown, a kind of processing method of mixed liquor, comprises the following steps:

[0030] S1. In the stirring tank, microetching waste liquid and leachate are obtained according to a volume ratio of 1:3 to prepare a mixed liquid.

[0031] After testing, the micro-etching waste liquid and leachate were mixed according to the ratio of 1:1, 1:2, 1:3, 1:4, 1:5, filtered after sufficient reaction, and the content of sulfate in the filtrate was detected. The test results show that the higher the proportion of leachate, the lower the sulfate content in the mixture. When the ratio of the two is greater than 1:3, the sulfate content basically does not change significantly, indicating that the solution has fully reacted at this time. Therefore, when the mixing ratio of micro-etching waste liquid and leachate is 1:3, it can not only e...

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Abstract

The invention relates to the technical field of waste liquid treatment and recovery, in particular to a mixed liquid treatment method and recovery method. The method is characterized by comprising the steps that in a stirring tank, micro-etching waste liquid and percolate are obtained according to the volume ratio of 1: 3, and the mixed liquid is prepared; and an agent is added into the mixed liquid for treatment and recovery. The method has the advantages of cost saving, high efficiency and pollution reduction.

Description

technical field [0001] The invention relates to the technical field of waste liquid treatment and recovery, more specifically, it relates to a mixed liquid treatment method and recovery method. Background technique [0002] The mixed liquor consists of microetching waste liquor and leachate. [0003] Micro-etching waste liquid is an industrial waste liquid produced by the printed circuit board industry (micro-etching process), and its main components are sulfuric acid and copper sulfate; while industrial solid waste landfill leachate is a kind of alkaline high-salt liquid Inorganic waste liquid, its main components are sodium, potassium and calcium salts. [0004] At present, the method commonly used to treat micro-etching waste liquid is the neutralization method, using lime or sodium hydroxide to adjust the pH of the micro-etching waste liquid to alkaline, settling out some heavy metals, adding sodium sulfide to further remove copper and nickel, and finally The evaporati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/52C02F1/66C02F3/00C02F1/04
CPCC02F9/00C02F1/5236C02F1/66C02F3/00C02F1/04
Inventor 陶杨谢德杰高炳森李文婷吴家俊
Owner 深圳市龙岗区东江工业废物处置有限公司
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