Recovery and utilization method of separated substances of coke-oven gas

Abstract

The invention discloses a recovery and utilization method of separated substances of coke-oven gas and belongs to the technical field of energy conservation and environmental protection of the cokingindustry. The recovery and utilization method is characterized in that a coke-side coke-oven gas recovery system is arranged at the coke side of a coke-oven carbonization chamber to recover raw coke-oven gas produced from the coke-oven carbonization chamber at the initial coking period and the final coking period, the raw coke-oven gas is conveyed into a coke-oven combustion chamber as fuel for heating of a coke oven; at the middle period of coking, the raw coke-oven gas produced in the the coke-oven carbonization chamber is recovered by a machine-side coke-oven gas recovery system at the machine side of the coke-oven carbonization chamber; meanwhile, at the middle period of coking, if the machine-side coke-oven gas recovery system fails or the pressure in the coke-oven carbonization chamber exceeds the coking operation capability, the raw coke-oven gas produced in the coke-oven carbonization chamber is recovered by adopting the coke-side coke-oven gas recovery system and is conveyed into the coke-oven combustion chamber. The recovery and utilization method of the separated substances of the coke-oven gas disclosed by the invention has the beneficial effect that the problem that when sudden accidents occur on the raw coke-oven gas recovery system, the diffusion loss of the raw coke-oven gas is serious and the environment is polluted is solved.

Description

technical field [0001] The invention relates to the recovery of coke oven gas, belongs to the technical field of energy saving and environmental protection in the coking industry, and in particular relates to a method for recovering and utilizing coke oven gas by quality. Background technique [0002] Coking production in coking plants is actually a typical process of energy reprocessing and heat energy recovery and reuse, and coke and coking gas are its main energy products. During the coke production process, the mixed coal is isolated from the air and heated to dry distillation in the coke oven, and a large amount of raw gas is produced while coke is produced. [0003] Under the action of the gas blower, the raw gas converges at the top of the carbonization chamber, flows through the riser, elbow and bridge pipe, and is cooled by the injected ammonia water and enters the subsequent gas purification system. [0004] For a single carbonization chamber, the generation of wa...

AI Technical Summary

Problems solved by technology

[0027] 1. The existing coke oven gas recovery system directly sucks the raw gas into the gas purification system, which cannot realize the recovery and utilization of the waste heat of the raw gas;

[0028] 2. The existing coke oven gas recovery system directly transfers the moisture in the raw gas into the gas purification system together with the gas, and the final form is coking residual ammonia water, which increases the difficulty and cost of subsequent treatment;

[0029] 3. The existing coke oven gas recovery process needs to ensure that the carbonization chamber is under a slight positive pressure, resulting in smoke and fire in the coke oven at the initial stage of coking, which seriously pollutes the environment;

[0030] 4. The existing coke oven supporting system cannot effectively and thoroughly solve the problem of serious loss of raw gas and environmental pollution when an emergency occurs in the waste gas recovery system

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