Method and system for removing oligomer pollution

Abstract

The invention relates to a method and a system for removing oligomer pollution, wherein the method comprises the following steps of: taking inertial aluminum oxide ceramic balls as filter materials of oligomer, wherein the inertial aluminum oxide ceramic balls are regular ball bodies with the diameter of 8mm, and cleaning oligomer deposited on the filter materials by high-temperature steam blowing. The system comprises a filter tank, wherein the filter tank is provided with a gas inlet and a gas outlet; the gas inlet is connected with a tail gas generation device through a gas inlet pipeline; the gas outlet is connected with a subsequent processing device through a gas exhaust pipeline; the filter tank is internally provided with a filter layer; the filter materials are inert aluminum oxide ceramic balls; an annular steam coil pipe is arranged above the filter layer, and a plurality of gas ventilation holes are uniformly formed at one side of the annular steam coil pipe, which is toward the filter layer. According to the invention, the inertial aluminum oxide ceramic balls are adopted as the filter materials, and have a good absorption effect on oligomer; and the oligomer on the filter materials can be cleaned effectively by adopting high-temperature steam blowing, the filter materials after cleaning have no blocking, and can be utilized repeatedly.

Description

technical field [0001] The invention relates to a method and system for removing oligomer pollution, belonging to the technical field of environmental protection. Background technique [0002] At present, for the tail gas treatment of the ABS process, the regenerative catalytic oxidation technology is usually used to treat the tail gas generated from the front-end mixing and granulation unit and the condensation drying unit, and the volatile organic compounds (VOCs) contained in it are mainly acrylonitrile and styrene. . Harmful substances in the tail gas are catalyzed and oxidized through the catalyst bed, and converted into harmless carbon dioxide and water, and the treated tail gas meets the national standard for discharge. [0003] However, in the tail gas treatment of the ABS process, it was found that the tail gas from the mixing and granulation unit contains a large amount of oligomers, which can easily block pipes, valves, and instruments, and have adverse effects o...

AI Technical Summary

Problems solved by technology

[0003] However, in the tail gas treatment of the ABS process, it was found that the tail gas from the mixing and granulation unit contains a large amount of oligomers, which can easily block pipes, valves, and instruments, and have adverse effects on subsequent equipment

Usually, filter cloth, filter felt, etc. are used to filter such substances in engineering. Although the filterability is good, the filter material cannot be regenerated, the operating cost is too high, and frequent replacement is required, which increases maintenance costs, increases labor intensity and is difficult to operate. inconvenient

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