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Method for processing kettle-liquid of acrylonitrile quench tower lower portion

A treatment process and a technology for a quenching tower, which is applied in the field of the treatment process of the lower section of the acrylonitrile quenching tower, and can solve the problems of complex composition and many impurities.

Inactive Publication Date: 2008-05-07
孙永敏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The bottom section of the kettle liquid has a complex composition and many impurities

Method used

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  • Method for processing kettle-liquid of acrylonitrile quench tower lower portion

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Embodiment Construction

[0007] The tank liquid treatment device in the lower section of the acrylonitrile quenching tower includes: liquid inlet 1, dosing port 2, partition 3, settling tank 4, mud pump 5, settling filter 6, overflow port 7, filtrate tank 8, water outlet 9 , mixer 10, centrifugal filter tank 11, centrifugal filter 12, adsorption tank 13, concentration tower liquid inlet 14, recovery tower reboiler steam inlet 15, concentration tower 16, concentration tower reboiler steam inlet 17, concentrated Tower reboiler condensate outlet 18, organic heavy component collector 19, concentrated ammonium sulfate liquid outlet 20, drying bed 21, ammonium sulfate inlet 22, ethanol washing tank 23, recovery tower 24, ethanol steam outlet 25, ethanol into the tower Port 26, finished ammonium sulfate port 27, recovery tower reboiler 28, vacuum pump 29, vacuum pump outlet 30.

[0008] Firstly, the still liquid in the lower section of the quench tower that has been simply settled for several hours is introd...

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Abstract

The present invention discloses the technological process of treating lower segment kettle liquid from acrylonitrile quenching tower, and relates to chemical waste water treating technology. The technological process includes flocculating the lower segment kettle liquid with flocculant, natural settling, centrifugal filtering, combined adsorption, and final decompression evaporating to concentrate. The water vapor from evaporation is used as the secondary heat source, the condensed water is used for replenishing technological water, the concentrated organic heavy components floating in the liquid surface is overflowed and burnt, and the residual concentrated ammonium sulfate solution is dewatered and washed with alcohol solution to obtain ammonium sulfate product, with the washed liquid being filtered and distilled to recover alcohol and the organic heavy residue being burnt or treated in other mode. The process can recover ammonium sulfate and water and reduce air pollution.

Description

[0001] The invention proposes a process for treating the liquid in the lower section of an acrylonitrile quenching tower, which relates to the technical field of processes and equipment for physical and chemical treatment of chemical wastewater. 2. Background technology [0002] The treatment method adopted in the prior art for the liquid in the lower section of the acrylonitrile quenching tower is: after simple particle impurity sedimentation, it is sent to the waste water furnace for incineration. Although this treatment method is simple, it consumes a lot of fuel oil and throws away the valuable ammonium sulfate in the kettle liquid. At the same time, it causes a certain amount of sulfur and nitrogen oxide pollution to the atmosphere, which is not an ideal treatment. method. [0003] The acrylonitrile quench tower is generally divided into upper and lower sections. The upper kettle liquid contains about 20% ammonium sulfate, and the liquid has less impurities, and is usual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F1/52C02F1/38C02F1/28C02F1/04F23G7/05F23G7/00C01C1/24
Inventor 孙永敏
Owner 孙永敏
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