A kind of coke oven hydrogen utilization method and system

Abstract

The present invention relates to the field of coal coke ovens, in particular to a coke oven hydrogen utilization method and its system, especially suitable for the comprehensive utilization of hydrogen-rich raw gas in different coking stages of coke oven coking process. One or more carbonization chambers are sequentially introduced into another or several other carbonization chambers that have just been filled with coal through the raw gas pipeline system, so that hydrogen-rich raw gas can be introduced to form a hydrogen-rich environment in the carbonization chamber that has just been filled with coal, control, A method for adjusting and inducing the cracking reaction of raw coal gas, so that the cracking reaction can be transformed into a light-weight target product. The furnace top of the carbonization chamber of the present invention has high-temperature hydrogen with high activation energy, which can react with the hydrogenation reaction of graphite at the top of the carbonization chamber for secondary cracking of coal tar, and eliminate the burning process of opening the furnace cover 10 to 20 minutes in advance of the combustion and decoking process. Improve tar yield and coke oven productivity.

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 generated. The coke oven is usually composed of multiple carbonization chambers (hearths) in parallel, 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 collecti...

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 the cracking of macromolecular raw coal 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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