Waste acid recycling process and matching device thereof

An acid recovery and process technology, applied in chlorine/hydrogen chloride, water/sludge/sewage treatment, flotation water/sewage treatment, etc., can solve the problems of high energy consumption, low operating cost, secondary pollution, etc. Difficult to clean, ensure stability, overcome the effect of easy clogging
CN102259954BInactive Publication Date: 2012-07-25郑州银科尔科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
郑州银科尔科技有限公司
Publication Date
2012-07-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a waste acid recycling process and a matching device thereof, belonging to the technical field of water treatment. The waste acid recycling process comprises the following steps of: carrying out pre-treatment on waste acid by virtue of ultrafiltration membrane air flotation; vertically mounting an ultrafiltration membrane assembly, and then feeding the waste acid from thelower part of the ultrafiltration membrane assembly by utilizing a gas-liquid hybrid power device to carry out ultrafiltration membrane air flotation purification treatment; and recycling the waste acid by adopting air flotation dialysis after the pre-treatment, thus having the advantages of low energy consumption, strong operability, good effluent quality, small waste acid recycling volume, highconcentration and the like. The matching device comprises a waste acid tank and a pre-treatment ultrafiltration membrane assembly which is vertically arranged, wherein the pre-treatment ultrafiltration membrane assembly is connected with a penetrating fluid discharge pipe, the lower part of the pre-treatment ultrafiltration membrane assembly is connected with a feeding pipe, the upper part of thepre-treatment ultrafiltration membrane assembly is connected with a concentrated solution discharge pipe, the other end of the feeding pipe of the pre-treatment ultrafiltration membrane assembly is communicated with the waste acid tank, and the feeding pipe is provided with the gas-liquid hybrid power device. The device has a compact structure, is stable in operation and simple in management and is applicable to recycling of multiple waste acids.
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Description

technical field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to a process for recovering waste acid and a device matched with the process. Background technique

[0002] Before surface electroplating and spraying, steel component blanks are generally pickled to remove surface oxides, and a large amount of pickling waste is generated at the same time. The types of workpieces and processing requirements are different, and the requirements for pickling liquid are also different, among which hydrochloric acid cleaning is the most common. The hydrochloric acid cleaning waste mainly contains Fe 2+ 、H + and Cl - Ions, in addition to a certain amount of oil and silicon powder, carbon and other suspended matter. If these pickling waste liquids are directly discharged without treatment, it will not only waste resources, but also cause serious environmental pollution.

[0003] For the pickling waste liquid in the iron and steel i...

Claims

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