System and method for efficiently recovering benzene in coke oven gas

Abstract

The invention relates to the technical field of coking product recovery, in particular to a system and method for efficiently recovering benzene in coke oven gas. The system comprises a final cooling tower, a supergravity washing tower, a lean and rich oil heat exchanger, a rich oil heater and a debenzolization tower which are sequentially connected, wherein a steam outlet in the top of the debenzolization tower is sequentially connected with a crude benzene condensation cooler, a separation reflux tank and a crude benzene tank, a hot lean oil outlet in the bottom of the debenzolization tower is sequentially connected with a hot lean oil pump, the lean oil-rich oil heat exchanger, a lean oil cooling pump, a buffer separator and a lean oil tank, and the lean oil tank is connected with the supergravity washing tower through a cold lean oil pump. According to the invention, the supergravity washing tower is introduced into the benzene recovery system for coke oven gas, and the arrangement of other equipment in the system and the condition setting in the process method are combined, so that the benzene in the coke oven gas is efficiently recovered, the scale of the equipment selected by the system and the consumption of circulating washing oil are greatly reduced, the operation energy consumption of the system is reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of recovery of coking products, in particular to a system and method for efficiently recovering benzene in coke oven gas. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] In the coking industry, a large amount of coke oven gas is produced in the coke production process, and the coke oven gas contains more tar, benzene and other substances. Therefore, coking enterprises are equipped with a benzene elution system in the coking production unit to recover coke. High value-added coking benzene in furnace gas. [0004] At present, the coking and benzene elution process adopts the traditional benzene washing and...

AI Technical Summary

Problems solved by technology

Therefore, the entire benzene elution system has problems such as equipment selection and large floor space, high equipment investment and energy consumption, low washing and absorption efficiency, and high operating costs.

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