Vinyl chloride high-boiling residue treatment and purification system

Abstract

The invention discloses a vinyl chloride high-boiling residue treatment and a purification system, which comprises a high-boiling residue storage tank, a third rectifying tower, a condenser and a dichloroethane storage tank, the upper end of the high-boiling residue storage tank is connected with a feed pipe, a first hot water return pipe, a recovery pipe, a nitrogen pipe and a first discharge pipe, and the lower end of the high-boiling residue storage tank is connected with a first blow-off pipe and a first hot water inlet pipe. The first discharging pipe is connected with the third rectifying tower, a second hot water inlet pipe, a second hot water return pipe and a second blow-off pipe are arranged at the bottom of the third rectifying tower, and a second discharging pipe connected to a middle tower of the third rectifying tower is connected with the dichloroethane storage tank. The system solves the problems that in the prior art, when on-site polling personnel are insufficient in configuration and the tower temperature is too high in the operation process of the third rectifying tower, the polling personnel do not adjust in time, dichloroethane at the high temperature is evaporated out and enters the chloroethylene and chloroethylene gas holder, and safe operation of the chloroethylene and chloroethylene gas holder is affected.

Description

technical field [0001] The application relates to the field of chemical systems, in particular to a vinyl chloride high boiler treatment and purification system. Background technique [0002] Vinyl chloride is an important monomer in polymer chemical industry, which can be prepared from ethylene or acetylene. It is a colorless, liquefied gas with ether-like odor. It has a wide range of uses, mainly used to manufacture polyethylene homopolymers and copolymers, used as a comonomer of various polymers, an important raw material in the plastics industry, and also used as a refrigerant. Also as an important raw material for the plastics industry, it mainly produces polyvinyl chloride resin. Vinyl chloride is obtained by addition of acetylene to chlorination in the presence of activated carbon as a carrier of mercuric chloride catalyst. At present, three rectification towers are commonly used to purify high boilers of vinyl chloride. However, the related operations of the thre...

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Problems solved by technology

However, the related operations of the three rectification towers (including feeding, cooling water, hot water supply, etc.) require intermittent manual operations on site. The inspection personnel did not adjust in time, so that dichloroethane was evaporated into the vinyl chloride vinyl chloride gas cabinet at high temperature, which affected the safe operation of the vinyl chloride vinyl chloride gas cabinet

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