Organic silicon emptying tail gas purification and recovery treatment system and method

Abstract

The invention belongs to the field of tail gas treatment, relates to a purification and recovery treatment system and method for organic silicon emptying tail gas, and designs a deep cooling, washing, absorbing, purifying and separating treatment facility for rectification and synthesis emptying tail gas. The methyl chlorosilane monomer in the vented tail gas is washed, absorbed and extracted, the vented gas after absorption is subjected to two-stage filtration, first-stage coarse filtration and second-stage precise demisting filtration to obtain clean vented gas (the removal rate is 99.9%) without the methyl chlorosilane monomer, mainly nitrogen and hydrocarbon combustible gas, and the clean vented gas is conveyed to an incinerator through a conveying power system to be incinerated. And the methyl chlorosilane monomer can be recovered to the system through absorption and extraction, so that resource utilization is realized, and the environmental protection risk is avoided.

Description

technical field [0001] The invention specifically relates to the production field of organosilicon vent gas washing, absorption, purification and recovery, and relates to the condensation, washing, absorption, purification and separation treatment technology of methyl chlorosilane vent gas. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The venting of rectification tail gas in the organosilicon industry and the venting of the synthetic fluidized bed contain a lot of methyl chlorosilane monomers, which has always been a difficult problem in the environmental protection of the organosilicon industry. It is directly incinerated into the incinerator to produce silica, which b...

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Problems solved by technology

[0003] The venting of rectification tail gas in the organosilicon industry and the venting of the synthetic fluidized bed contain a lot of methyl chlorosilane monomers, which has always been a difficult problem in the environmental protection of the organosilicon industry. It is directly incinerated into the incinerator to produce silica, which blocks the incineration unit equipment, and The large amount of dust affects the follow-up operation load of the incineration system, resulting in difficulties in follow-up treatment operation, which restricts the safe and stable operation of the organic silicon industry and the treatment of environmentally friendly VOCs tail gas

In the industry, there are direct first-level and second-level water washing or multi-level washing treatment. After washing, the tail gas is vented or incinerated. The problem is that a large amount of siloxane organic matter is produced during the hydrolysis reaction during the washing process, which is a hazardous waste that is difficult to handle, and a large amount of hydrogen chloride is produced during the hydrolysis process. Gas, causing environmental pollution, there is a greater risk of environmental protection; the air released after washing is highly acidic, contains VOCs volatile organic compounds, causing environmental impact, and there is corrosion of equipment and pipelines in the incinerator, there is a greater risk of environmental protection

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