A treatment method for waste gas in chemical acrylamide production

Abstract

The invention relates to a method for processing waste gas in acrylamide production by a chemical method. In the method, a waste gas is fed into a waste gas precooler to cool the waste gas to be 10-30 DEG C.; the cooled waste gas is fed into a waste gas adsorber which is formed by serial connection of three adsorbers; a medium filled in the adsorber is powdery active carbon, granular active carbon or fibrous active carbon; two of the three adsorbers simultaneously work online in a serial connection manner; the adsorbed waste gas is discharged into atmosphere directly; and the other adsorber resolves the acrylamide adsorbed on the adsorbing medium by using saturated steam; after being cooled by a recovered acrylamide cooler, the resolved acrylamide and the steam are recycled; the three adsorbers perform adsorption resolving operations in turn and switch automatically. The waste gas processed by the method can reach the environmental protection emission standard, and post-treatments such as burning or oxidation and the like are not needed; investment and process consumption are reduced; a greatest amount of acrylamide is recovered; and aims of saving energy and reducing emission are fulfilled.

Description

technical field [0001] The invention relates to a method for treating waste gas in the production of chemical acrylamide. Background technique [0002] At present, in the production process of chemical acrylamide, the waste gas generated is usually treated by direct incineration or absorbing and recovering the acrylonitrile and then oxidized or incinerated to ensure that the emission of waste gas in the production process of acrylamide meets the requirements of environmental protection. . Due to the large amount of exhaust gas produced during the production of chemical acrylamide, usually the amount of exhaust gas produced per ton of acrylamide is 1500Nm 3 , the fuel required for incineration or oxidation is a lot, and it contains a lot of acrylonitrile, resulting in waste of fuel and acrylonitrile. Contents of the invention [0003] The purpose of the present invention is to provide a treatment method for waste gas in the production of chemical acrylamide, which can mak...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a treatment method for waste gas in the production of chemical acrylamide, which can make the discharge of waste gas meet the requirements of environmental protection, and at the same time recover the largest amount of acrylonitrile and consume the least amount of energy, so as to overcome the existing methods The energy consumption is large, and the loss of acrylonitrile is too large.

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