An environment-friendly recovery system and process for releasing air from a chemical feed tank

Abstract

The invention discloses an environment-friendly recycling system and process for air discharged from a chemical feeding trough. The environment-friendly recycling system comprises a feeding trough and a condenser, wherein after a raw material benzene enters the feeding trough, liquid benzene enters a benzene feeding pump of a hydrogenation reactor from a liquid outlet of the feeding trough, benzene vapor in the feeding trough enters the condenser from a gas outlet of the feeding trough, the condensed liquid benzene is returned into the feeding trough from a liquid outlet of the condenser, and a gas outlet of the condenser is connected to a flare gas main pipe. By adopting the environment-friendly recycling system, the benzene vapor in the feeding trough can be sufficiently utilized, and the utilization rate of the raw material benzene can be increased; and the air pollution can be reduced.

Description

technical field [0001] The invention relates to an environment-friendly recovery system and process for releasing air from a chemical feed tank. Background technique [0002] Cyclohexanol is a relatively important chemical product, which is mainly used to prepare cyclohexanone and adipic acid, and is also used to prepare plasticizers, surfactants and industrial solvents. In the process of industrial production of cyclohexanol, benzene is usually used as raw material for hydrogenation reaction. Before the benzene is sent to the hydrogenation reactor, the benzene needs to be refined and pretreated, so that the benzene can increase the rate of the hydrogenation reaction and reduce the reaction time after entering the hydrogenation reactor. [0003] Under normal circumstances, the refined benzene needs to enter the feeding tank to buffer and store the refined benzene. The working pressure of the feeding tank is 7.0KPaG~9.0KPaG (unit KPaG means gauge pressure, gauge pressure: ga...

AI Technical Summary

Problems solved by technology

Benzene is a highly hazardous, toxic, volatile, and carcinogenic substance. Under this working condition, the gas phase space in the benzene feeding tank is filled with volatile benzene vapor. Under the existing process conditions, it is impossible to transport benzene vapor to the hydrogenation reactor , thereby reducing the utilization rate of raw material benzene; at the same time, due to the need to control the air pressure of the feed tank, it will also cause some benzene vapor to pollute the air and damage the environment

Images