Membrane type fixed bed catalyst raw coke oven gas waste heat recovery and hydrogen utilization ascending pipe

Abstract

The invention discloses a membrane type fixed bed catalyst crude gas waste heat recovery and hydrogen utilization ascending pipe. The pipe comprises an ascending pipe shell and a bridge pipe tee joint; a raw gas channel is formed in the ascending pipe, and the ascending pipe further comprises a cylinder wall heat preservation layer, a temperature control and waste heat recovery device, an anti-corrosion ceramic layer and a membrane type fixed bed catalyst layer; the inner layer of the pipe wall of the shell of the ascending pipe is a barrel wall heat preservation layer, a temperature control and waste heat recovery device is arranged on the inner ring of the barrel wall heat preservation layer, and a working medium for taking away waste heat of raw coke oven gas is introduced into the temperature control and waste heat recovery device; an anti-corrosion ceramic layer is attached to the surface of the outer layer of the temperature control and waste heat recovery device, or a mixed layer formed by combining the anti-corrosion ceramic layer and a membrane type fixed bed catalyst layer is attached to the surface of the outer layer. According to the invention, the hydrogen-rich raw coke oven gas is subjected to directional reaction at a proper temperature under the action of the catalyst, the technical bottleneck problem in the existing coke oven production process is eliminated, the reliability and stability of the riser are improved, and the long-term stable and safe operation of the system is facilitated.

Description

technical field [0001] The invention relates to the field of coal coke ovens, in particular to a coke oven energy-saving device and its gas hydrogen resource utilization device, especially suitable for a membrane-type fixed-bed catalyst for synthesizing raw gas and hydrogen-enrichment in different coking stages of the coke oven coking process. Recovery and hydrogen utilization risers. 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 At the outlet of the raw gas riser pipe, the high-temperature raw gas of about 850°C is dry-distilled during the coking process of the coal in the carbonization chamber at 1000±50°C. The raw coal gas enters the riser assembly through the raw gas outlet of the ca...

AI Technical Summary

Problems solved by technology

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 40-60% 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 sulfur and nitrogen contained in coal tar are difficult to remove, and further use or combustion will cause environmental pollution of sulfide and nitrogen compounds, and desulfurization and denitrification will increase the process cost;

[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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