Novel full negative pressure coke oven gas purifying combination process

Abstract

The invention provides a novel full negative pressure coke oven gas purifying combination process, and belongs to the field of coking. Besides a process of ammonia and sulphur circulation washing, various purifying deamination and desulfuration processes for coke oven gases are also combined under the condition of negative pressure. The novel full negative pressure coke oven gas purifying combination process comprises an initial cooling working procedure, an electrical tar trap working procedure, a deamination working procedure, a final cooling working procedure, a benzene washing working procedure, a desulfuration working procedure and a blast working procedure. For gas purification equipment in multiple processes of the deamination working procedure, the final cooling working procedure, the benzene washing working procedure and the desulfuration working procedure, the working pressure thereof is between -15 and -1 KPa; in addition, the gas outlet temperature of the initial cooling working procedure rises, the energy consumption of gas purification devices is reduced, the process flow is simplified and the investment for constructing the devices is reduced.

Description

technical field [0001] The invention belongs to the field of coking, and in particular relates to the combined application of various coke oven gas purification deammonization and desulfurization process flows under full negative pressure conditions. Background technique [0002] The purification of coke oven gas in the coking industry is realized through the following steps: gas cooling, gas naphthalene removal, gas detarring, gas desulfurization, gas deammonization, gas debenzene and gas pressurized transportation. The procedures or application processes corresponding to each step are as follows: Gas cooling: initial cooling process, intermediate cooling process and final cooling process. In the gas cooling process, the gas is cooled by direct contact with the cooling medium, which is a direct cooling process; the gas is cooled after indirect heat exchange with the cooling medium through the heat exchange tube wall, which is an indirect cooling process. Gas naphthale...

AI Technical Summary

Problems solved by technology

Except for the ammonia-sulfur cycle washing process, other various coke oven gas purification deammonization and desulfurization processes are not combined under negative pressure conditions, and there is no full negative pressure process in the full sense

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