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Tail gas treatment method and system for DMF wastewater

A technology of wastewater treatment and treatment method, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems that formic acid and odor cannot be effectively removed, and the removal rate of tail gas treatment is not high, and can reduce the odor index and VOCs concentration, enhancement effect, effect of improving air environment

Pending Publication Date: 2020-04-24
SHAANXI BLOWER GROUP
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  • Application Information

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Problems solved by technology

[0005] For the defects or deficiencies in the above-mentioned prior art, the object of the present invention is to provide a comprehensive treatment method for the tail gas produced by the DMF wastewater treatment process, so as to solve the problem that the current removal rate of tail gas is not high, formic acid and odor cannot be effectively remove the problem

Method used

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  • Tail gas treatment method and system for DMF wastewater
  • Tail gas treatment method and system for DMF wastewater

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Embodiment 1

[0029] Such as figure 1 As shown, the present invention provides a kind of comprehensive treatment system for the tail gas that DMF waste water treatment process produces, the tail gas that synthetic leather contains DMF waste water treatment process system to produce is collected and mixed and enters tail gas pickling tower and alkali washing tower successively, and the tail gas in the tail gas is collected and mixed. The dimethylamine and formic acid are fixed in the form of dimethylamine sulfate and formic acid sodium salt respectively, and then concentrated for resource utilization, and the qualified tail gas after washing is discharged into the atmosphere. Specifically include the following plans:

[0030] A treatment system for tail gas generated in DMF wastewater treatment, the generated tail gas is firstly removed by acid wash tower to remove dimethylamine, and then by alkali wash tower to remove formic acid;

[0031] The pickling tower includes a multi-stage packed s...

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Abstract

The invention provides a tail gas treatment method and system for DMF wastewater, which belong to the technical field of industrial sewage treatment. The method comprises the following steps: firstly,removing dimethylamine from generated tail gas through a pickling tower, and then removing formic acid through an alkaline washing tower, wherein the pickling tower comprises multiple stages of filler spray towers, and tail gas enters from the bottom of the pickling tower and is removed by contacting with filler and an acid solution sprayed from top to bottom, the alkaline washing tower comprisesmultiple stages of tower plate spray towers, and tail gas passing through the pickling tower enters from the bottom of the alkaline washing tower and is removed by contacting with the filler and a strong alkali solution sprayed from top to bottom. According to the invention, foul tail gas (dimethylamine and formic acid) generated by the synthetic leather DMF-containing wastewater treatment process system is effectively treated at a low cost, and the production area and the surrounding air environment are improved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection tannery industrial sewage, relates to the treatment of DMF-containing wastewater, and in particular to a tail gas comprehensive treatment technology of DMF-containing wastewater. Background technique [0002] The production method of wet-process polyurethane synthetic leather is to add DMF solvent and other fillers and additives to polyurethane wet-process resin to make a mixed solution. (DMF) has affinity, and the water that is not compatible with polyurethane resin, the solvent (DMF) is replaced by water, and the polyurethane resin gradually solidifies, thus forming a porous film, that is, the microporous polyurethane grain surface layer, which is veneered by dry method Or after the surface is finished, such as surface printing, embossing, grinding and other processes, it becomes a finished product of polyurethane synthetic leather. It can be seen that in the production process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/72B01D53/54
CPCB01D53/78B01D53/72B01D53/54B01D2251/506B01D2251/304B01D2251/604
Inventor 汪礼鹏赵万虎陈子南任矿施小将谢永康李进李剑峰刘伟明袁浩李宇建唐游
Owner SHAANXI BLOWER GROUP
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