Process for recycling acrylic wastewater

A technology for wastewater treatment and acrylic acid, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. It can solve the problems of low recovery rate of acrylic acid, dark color of acrylic acid concentrate, and many impurities , to achieve the effect of realizing industrialized production operation, reducing waste water discharge and reducing evaporation

Active Publication Date: 2015-07-15
HANGZHOU BLUETEC ENVIRONMENTAL TECH
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Problems solved by technology

However, the recovery rate of acrylic acid in the membrane concentration stage of this method is ve

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  • Process for recycling acrylic wastewater

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[0023] With reference to the accompanying drawings, the acrylic acid wastewater (acrylic acid wastewater, containing impurities such as polyacrylic acid, ferric ions and pigments) entering the process of the present invention is processed by the following steps:

[0024] (1) Treat with nanofiltration (NF) system to remove impurities such as polyacrylic acid colloid, ferric ions and pigments; the recovery rate of acrylic acid by nanofiltration is controlled at more than 98%. The removal rate of impurities such as ferric ions and pigments is over 80%. The above parameters can also be adjusted according to the needs of subsequent processing. The water produced by the nanofiltration system enters the treatment of step (2). The membrane module used in the nanofiltration system can be a rolled membrane, and the membrane material is selected from cellulose acetate (CA), sulfonated polysulfone (SPS), sulfonated polyethersulfone (SPES) and polyvinyl alcohol (PVA). Strong pollution, g...

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Abstract

The invention provides a process for treating acrylic wastewater through a membrane process. The process for treating the acrylic wastewater comprises the following steps: 1) performing nanofiltration system treat (NF); 2) performing two-stage electroosmosis system (ED) treatment, introducing concentrated outlet water which passes through the electroosmosis system into a follow-up rectifying process or a high-pressure reverse osmosis process, and recycling fresh outlet water into an acrylic acid absorption tower for being recycled as absorbed water. The process disclosed by the invention can be used for comprehensively treating the acrylic wastewater without causing environmental load, and can be used for recycling the acrylic wastewater.

Description

technical field [0001] The invention relates to a process for treating and recycling acrylic acid wastewater. Background technique [0002] Acrylic acid wastewater has the characteristics of high organic matter content, complex water quality, and poor biodegradability. In terms of the treatment of acrylic acid wastewater, many studies have been carried out at home and abroad, but they mainly focus on the treatment process of wastewater. At home and abroad, the treatment of acrylic acid wastewater is mainly terminal control, and the technologies used are mainly: biochemical method, electrochemical method, catalytic oxidation method, incineration method, etc. Most of these methods remain on the basis of laboratories. Although the incineration method has been applied in engineering, its cost is too high, which is not conducive to large-scale promotion. [0003] Most domestic acrylic acid wastewater treatment has not systematically analyzed from the perspectives of clean produ...

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Application Information

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IPC IPC(8): C02F9/06C02F9/10
Inventor 楼永通陈良易资利
Owner HANGZHOU BLUETEC ENVIRONMENTAL TECH
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