Organosilicon monomer synthesis vent gas purification system and method

By using a purification system consisting of a cross-flow plate tower and a high-boiling liquid circulation tank in the organosilicon monomer synthesis process, the problem of air release during fluidized bed shutdown was solved, achieving efficient and low-cost environmentally compliant emissions.

CN117379905BActive Publication Date: 2026-07-21TANGSHAN SANYOU SILICON IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TANGSHAN SANYOU SILICON IND
Filing Date
2023-12-05
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

In the existing technology for organosilicon monomer synthesis, the nitrogen content in the vent air during fluidized bed shutdown is high, causing particulate matter to clog the nozzles. Furthermore, the exhaust gas treatment methods are energy-intensive and costly, failing to meet environmental protection requirements.

Method used

The purification system uses a cross-flow plate tower and high-boiling liquid as the absorbent, combined with the emergency stop interlock of the DCS control system. The monomer is recovered by flash evaporation in the high-boiling liquid circulation tank, the pressure of the water washing tower is reduced, the amount of floating oil and solid sludge is reduced, and the exhaust gas is ensured to meet the emission standards.

Benefits of technology

It significantly reduced the content of methylchlorosilane monomers and dust in exhaust gas, reduced energy consumption and costs, and achieved environmentally compliant emissions.

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Abstract

The application discloses a kind of organic silicon monomer synthesis vent tail gas purification system and method, purification system includes tail gas scrubber, vent air condenser, gas-liquid separation tank, high-boiling liquid circulating tank, tail gas scrubber circulating pump, scrubbing liquid cooler and slurry tank, compared with prior art, using the purification method of system of the application, can reduce methyl chlorosilane monomer entrained by tail gas, and by sending the material in high-boiling liquid circulating tank to flash tank flash recovery monomer, entrained dust when venting tail gas is washed, reduce the tail gas treatment pressure of water washing tower, reduce the amount of floating oil and water washing solid residue in water washing pool, eliminate the flue gas generated after tail gas washing, ensure that the high temperature, with methyl chlorosilane monomer of dust containing vent air discharged by organic silicon monomer synthesis process is discharged up to standard, with very significant environmental benefits.
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