Organosilicone high-boiling-component removing and low-boiling-component removing tower pressure-variable thermal coupling distillation method and equipment

Abstract

The invention discloses a rectification method and equipment for pressure-variable thermal coupling of organosilicon de-elevation and de-elevation towers. The equipment includes de-elevation towers and de-elevation towers. The heavy components are extracted from the kettle; the light components are extracted from the top of the tower; the gaseous phase material at the top of the de-elevation tower enters the reboiler of the de-elevation tower tower as a heat source; The gaseous phase material at the top of the de-elevation tower also enters the reflux tank at the top of the de-elevation tower after being condensed by the tower top condenser of the de-elevation tower. Part of the condensed liquid phase of the components returns to the top of the de-higher tower as reflux, and the other part enters the de-lowering tower as feed; the mixture extracted from the bottom of the de-lowering tower enters the subsequent refining tower for refining. The present invention adopts pressure swing thermal coupling technology and equipment, uses the gaseous phase material at the top of the de-higher tower as the heat source of the reboiler of the de-higher tower, rationally utilizes the steam energy of the gas phase at the top of the high-removal tower, and reduces energy consumption , and save energy, while reducing the amount of circulating water.

Description

technical field [0001] The invention relates to a rectification device and a rectification method, in particular to a rectification device and a rectification method for a pressure-swinging heat coupling rectification device and a rectification method of a high-removal tower and a low-removal tower in a methylchlorosilane separation device in the organic silicon industry. Background technique [0002] At a higher reaction temperature, the halogenated hydrocarbon and silicon powder are acted on in one step through a catalyst to generate a crude methylchlorosilane monomer, which mainly contains trimethylmonochlorosilane (Me3), monomethyltrichlorosilane (Me1) and Dimethyldichlorosilane (Me2), high boilers with a higher boiling point than dimethyldichlorosilane (Me2) and low boilers with a lower boiling point than trimethylmonochlorosilane (Me3). [0003] The separation of the crude methyl chlorosilane monomer will go through the treatment of de-elevation and de-lowering, that i...

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Problems solved by technology

[0006] In order to solve the problems existing in the prior art, the present invention provides an organosilicon de-elevation and de-degradation tower pressure-swing thermal coupling rectification method and rectification equipment, which overcomes the problems of circulating water and steam in the de-elevation tower and de-degradation tower in the prior art The problem of high consumption and high energy consumption

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