Chloromethane recovery system and method

Abstract

The invention provides a chloromethane recovery system and a chloromethane recovery method. The chloromethane recovery system comprises a chlorosilane mixed monomer synthesis tower, a chlorosilane mixed monomer separation tower and a chloromethane recovery device, wherein the chlorosilane mixed monomer synthesis tower is connected with the chlorosilane mixed monomer separation tower; the chlorosilane mixed monomer separation tower is connected with a chloromethane recovery device; the chloromethane recovery device comprises a chloromethane compression device, a chloromethane heat exchanger, a chloromethane buffer tank, a condensing device, a chloromethane return tank and a chloromethane feeding pump; the chloromethane compression device is connected with the chlorosilane mixed monomer synthesis tower; the chloromethane heat exchanger and the chloromethane buffer tank form a communicating vessel structure, and the chloromethane heat exchanger is connected with the condensing device; and the chloromethane buffer tank is connected with the chlorosilane mixed monomer synthesis tower. According to the invention, through mutual conversion of gas and liquid two-phase circulation, heavy components in the chloromethane are finally removed, the purity of the recovered chloromethane is improved, thermal resistance is effectively prevented from being formed, and the driving period of the system is prolonged.

Description

technical field [0001] The invention relates to the field of organosilicon monomer production, in particular to a methyl chloride recovery system and method. Background technique [0002] In the currently used methyl chloride recovery technology, the recycled methyl chloride has a relatively high impurity content. When the impurity-containing methyl chloride passes through the primary and secondary superheaters, coke produced by high-temperature cracking will adhere to the heat exchange tube wall, resulting in Thermal resistance reduces the heat exchange efficiency of the superheater and shortens the service life of the heat exchanger. In severe cases, the system will be forced to stop. During maintenance, the labor intensity of workers will be increased due to too much coke on the heat exchange tube bundle, and the maintenance cycle will be prolonged. . Contents of the invention [0003] The invention provides a system and method for recovering methyl chloride, which is ...

AI Technical Summary

Problems solved by technology

[0002] In the currently used methyl chloride recovery technology, the recycled methyl chloride has a relatively high impurity content. When the impurity-containing methyl chloride passes through the primary and secondary superheaters, coke produced by high-temperature cracking will adhere to the heat exchange tube wall, resulting in Thermal resistance reduces the heat exchange efficiency of the superheater and shortens the service life of the heat exchanger. In severe cases, the system will be forced to stop. During maintenance, the labor intensity of workers will be increased due to too much coke on the heat exchange tube bundle, and the maintenance cycle will be prolonged.

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