Acrylonitrile waste liquid treatment method
A technology of acrylonitrile waste liquid and treatment method, which is applied in the direction of combustion method, filtration treatment, water/sewage treatment, etc. It can solve the problems that conventional treatment technology cannot be used, and it is difficult to use hydrolyzed microorganisms, so as to recover available resources and reduce incineration cost, effect of recycling
Pending Publication Date: 2022-02-11
BEIJING WANBANGDA ENVIRONMENTAL PROTECTION TECH
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Problems solved by technology
The polymers in acrylonitrile wastewater mainly come from low-molecular polymers and copolymers of nitrile substances. These polymers generally exist in colloidal or dissolved forms in water, and are difficult to be hydrolyzed and utilized by microorganisms, so they cannot be treated by conventional treatment technologies. deal with
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[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.
[0035] The following disclosure provides many different implementations or examples for implementing different features of the invention. Specific examples of components and arrangements are described below to simplify the present disclosure. Of course, these are examples only and are not intended to limit the invention. In addition, the technical solutions of various embodiments can be combined with each other, but it mus...
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The invention provides an acrylonitrile waste liquid treatment method. The acrylonitrile waste liquid treatment method comprises a high-boiling-point substance separation module, a low-boiling-point substance separation module, a high-boiling-point component treatment device, a deep treatment module and an oil phase separation device. According to the method, the high-boiling-point substance separation module and the low-boiling-point substance separation module are adopted, the chemical oxygen demand (COD) and the content of various pollutants in evaporation condensate are reduced by controlling the evaporation temperature and separation parameters, heavy-component pollutants in the acrylonitrile waste liquid are left in high-boiling-point components, and the purpose of reducing the acrylonitrile waste liquid is achieved. Through the high-boiling-point component treatment device and the oil phase separation device, the combustibility of high-boiling-point components is improved, available resources are recycled, and the incineration cost is reduced. Separated water components are further treated by the deep treatment module, so that water resources are recycled.
Description
technical field [0001] The invention relates to the technical field of industrial water treatment, and more specifically, relates to a method for treating acrylonitrile waste liquid. Background technique [0002] As an important chemical raw material, acrylonitrile is widely used in the manufacture of chemical products such as ABS plastic, nitrile rubber, acrylamide, acrylic fiber and synthetic resin. [0003] The current acrylonitrile production process adopts the classic propylene ammoxidation method (sohio method), using propylene, ammonia and air as the main raw materials, under certain reaction conditions and the action of a catalyst, to produce acrylonitrile, and the by-products are mainly acetonitrile and hydrocyanic acid. [0004] In the process of acrylonitrile production, a high-concentration cyanide-containing waste liquid will be produced. Its water quality is complex, the concentration of pollutants is high, it contains a variety of organic substances and polyme...
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IPC IPC(8): C02F9/10F23G7/00C02F101/16C02F101/18C02F103/36
CPCC02F9/00F23G7/001C02F1/04C02F1/001C02F1/44C02F1/725C02F1/38C02F2103/36C02F1/441C02F2101/16C02F2101/18C02F2305/026
Inventor 范飞梁琪赵磊牟志强孟祥龙李会娟高振东
Owner BEIJING WANBANGDA ENVIRONMENTAL PROTECTION TECH