System and method for efficiently recovering benzene in coke oven gas

A technology for coke oven gas and benzene, which is applied in the field of systems for efficiently recovering benzene in coke oven gas, can solve the problems of high operating costs, low washing and absorption efficiency, and high equipment investment and energy consumption.

CN112812856AInactive Publication Date: 2021-05-18SHANDONG PROVINCE METALLURGICAL ENG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-05-18
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment

[0055] like figure 1 As shown, a system for efficiently recovering benzene in coke oven gas includes a final cooling tower 1, a high-gravity scrubber 2, a lean-rich oil heat exchanger 4, a rich-oil heater 5, and a benzene removal tower 6;

[0056] The final cooling tower 1, the supergravity washing tower 2, the lean-rich oil heat exchanger 4, the rich-oil heater 5 and the debenzene tower 6 are connected in sequence;

[0057] The steam outlet at the top of the debenzene tower 6 is connected with the crude benzene condensation cooler 7, the separation reflux tank 8 and the crude benzene tank successively 9;

[0058] The separation reflux tank 8 is also connected to the top inlet of the debenzene tower through a reflux pump 18, the separation reflux tank 8 is also connected to a non-condensable gas cooler 10, and the non-condensable gas cooler 10 is connected to a vacuum pump 11;

[0059] The hot lean oil outlet at the bottom of the debenzene tower 6 is sequentially connected wi...