Treatment method and device of diketene process waste gas

Abstract

The invention relates to a treatment method and device of diketene process waste gas. The device comprises a tail gas absorption circulating tank, a circulating water tank, a tail gas absorber, an activated carbon adsorber, an induced draft fan, a tail gas water-sealed tank and a cracking furnace, wherein the gas absorption circulating tank is communicated with the circulating water pump and the tail gas absorber, the tail gas absorber and the activated carbon adsorber are communicated, the activated carbon adsorber is communicated with the induced draft fan, the induced draft fan is communicated with the tail gas water-sealed tank, and the tail gas water-sealed tank is communicated with the cracking furnace. According to the treatment method of the diketene process waste gas, organic combustible non-condensable gases produced in each procedure of diketene are collected by specific devices and enter the acetic acid cracking furnace for combustion after gas-liquid separation, on one hand, the problem of atmospheric environment pollution is solved, on the other hand, clean fuel is converted into energy for use, energy saving and emission reduction are realized, and the cost is reduced.

Description

technical field [0001] The invention relates to a treatment method and device for diketene process waste gas. Background technique [0002] The production of diketene is based on acetic acid as the starting material, which is cracked to produce ketene and water, and ketene undergoes a dimerization reaction to produce diketene. The conversion rate of acetic acid in the cracking process is 90%, and the selectivity of the main reaction is 99%. Hydrogen, methane, ethylene, carbon monoxide, carbon dioxide, acetone, water and other by-products will be produced during the cracking reaction of acetic acid. [0003] The process of generating tail gas in the whole process: Tail gas 1: After the gas generated in the reaction process is separated from acid anhydride, diketene and its high polymer by the oil-gas separator, the ketene gas is then absorbed by the double-stage oil ring pump, and the tail gas of the final absorption tower is returned Contains ketene, methane, ethylene, carb...

AI Technical Summary

Problems solved by technology

[0007] The diketene process exhaust gas treatment device of the present invention collects the organic combustible non-condensable gas produced by each process of diketene through a specific device, and after gas-liquid separation, enters the acetic acid cracking furnace for combustion. On the one hand, it solves the problem of polluting the atmospheric environment, and on the other hand On the one hand, convert clean fuel into energy, save energy and reduce consumption, and reduce costs

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