Coke oven hydrogen utilization method and system

Abstract

The invention relates to the field of coke furnaces, particularly to a coke oven hydrogen utilization method and system. The method is especially suitable for hydrogen-rich comprehensive utilization of raw coke oven gas in different coke curing periods of a coke oven coking process. The method comprises the following steps: sequentially introducing hydrogen-rich raw coke oven gas obtained in a later period of coking from one or more carbonization chambers into another carbonization chamber or a plurality of other carbonization chambers which are just filled with coal through a raw coke oven gas pipe duct system; allowing the introduced hydrogen-rich raw gas to form a hydrogen-rich environment in the carbonization chambers which are just filled with the coal; and enabling a cracking reaction to realize conversion to a light target product by controlling, adjusting and inducing the cracking reaction of the raw gas. The furnace tops of the carbonization chambers have high-temperature hydrogen which has very high activation energy and can undergo a hydrogenation reaction with graphite at the top of the carbonization chambers for secondary cracking of coal tar, so the charring procedureof opening a furnace cover 10-20 minutes ahead of time in the processes of combustion and decoking is eliminated, tar yield is increased, and coke oven productivity is improved.

Description

technical field [0001] The invention relates to the field of coal coke ovens, in particular to a coke oven hydrogen utilization method and a system thereof, and is especially suitable for a technical method for the comprehensive utilization of hydrogen-rich raw gas in different coking stages of the coke oven coking process. Background technique [0002] In the coking process, the coking coal is heated and dry-distilled in the coke oven to generate coke, and at the same time, a large amount of raw coal gas is produced. The coke oven is usually composed of multiple carbonization chambers (hearths), and each carbonization chamber is equipped with Coal inlet, raw gas outlet, rising pipe assembly and one-way flap valve. During the coking process of coal in the carbonization chamber, high-temperature raw gas of up to 850°C is produced. The raw gas enters the rising pipe assembly through the carbonization chamber raw gas outlet The ammonia water enters the air collecting pipe after...

AI Technical Summary

Problems solved by technology

[0006] Obviously, coke oven gas containing 50-60% hydrogen is difficult to separate hydrogen after coking

Cause waste of hydrogen resources

[0007] In short, the distilled raw gas is coked in the carbonization chamber, riser pipe, and bridge pipe, which wastes raw gas resources, brings great hidden dangers to safe production, increases the labor intensity and difficulty of equipment maintenance during the production process, and reduces the cost of coke ovens. Productivity, the reason is caused by the cracking of macromolecular raw gas. At the same time, the light processing of coal tar requires hydrogenation, and the hydrogen resources containing 50-60% in the gas cannot be used, so there are still many in the coke oven process. Technical difficulties and pain points:

[0008] 1. The cracking reaction of macromolecular coal tar will cause a large amount of deposited carbon to adhere to the top of the carbonization chamber, the riser and the bridge pipe, which will bring great hidden dangers to safe production and increase the labor intensity and difficulty of equipment maintenance during the production process;

[0009] 2. The temperature of the furnace top space should be difficult to control;

[0010] 3. The top of the carbonization chamber burns graphite to remove coke, which wastes energy, wastes resources, and reduces the productivity of the coke oven;

[0011] 4. The pyrolysis of macromolecular coal tar reduces the yield of tar and reduces the benefit;

[0012] 5. Raw coal gas low-temperature coke graphite has a high temperature, which wastes the energy consumption of subsequent ammonia water injection and wastes waste heat

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