A method and device for direct separation of coke oven raw gas components using cold energy

Abstract

The invention relates to a method and a device for directly separating coke oven crude gas components by using cold energy. Cold energy liquid nitrogen sequentially flows through a cold energy inlet of a first heat exchange device, a cold energy inlet of a second heat exchange device and a cold energy inlet of a third heat exchange device, coke oven gas after being trolleyed sequentially enters the first heat exchange device, the second heat exchange device and the third heat exchange device to carry out gas-liquid separation, and a first separating liquid storage tank, a second separating liquid storage tank and a third separating liquid storage tank are respectively arranged between a gas-liquid separation outlet of the first heat exchange device and a gas-liquid separation inlet of the second heat exchange device, between a gas-liquid separation outlet of the second heat exchange device and a gas-liquid separation inlet of the third heat exchange device, and a gas-liquid separation outlet of the third heat exchange device. The device disclosed by the invention can replace traditional washing and separation equipment, and improves the separation efficiency, fewer pollutants are discharged, a multifarious impurity removal procedure of a LNG process is replaced, and in combination with a production workshop using liquefied products, the gasification energy of different grades of liquefied products is fully used.

Description

technical field [0001] The invention relates to the technical field of coke oven gas component separation, in particular to a method and device for directly separating coke oven raw gas components by using cold energy. Background technique [0002] In the known technical field, the separation of the chemical components of the coke oven raw gas in the coking plant needs to be removed and then separated by washing. There are problems of low washing removal efficiency and low separation efficiency. First, the washing removal rate is low, which affects the normal use of subsequent processes; Hazardous material discharge. [0003] The process of producing LNG from natural gas has invested a lot of money and energy under pressurized conditions, using complex physical and chemical adsorption, hydrogenation temperature swing adsorption and other processes to remove harmful impurities. Contents of the invention [0004] The technical problem to be solved by the present invention ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to improve the removal efficiency of coke oven gas chemical components, reduce the waste water and treatment costs brought in by washing, utilize the characteristics of coke oven gas components that can be condensed and liquefied, and overcome the traditional separation method. To solve the problem of environmental pollution, provide a method and device for directly separating components of coke oven raw gas by using cold energy

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