A hydro-gasification process

By using a combination of inert gas and methanol-coal powder, the safety hazards and design complexity of high-pressure hydrogen transportation of coal powder were solved, achieving a safe and efficient hydrogenation gasification reaction, improving product quality and reducing hydrogen consumption.

CN116355655BActive Publication Date: 2026-04-28ENN SCI & TECH DEV
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Patent Information

Application Number
CN202310409266.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-04-17
Publication Date
2026-04-28
Estimated Expiration
2043-04-17

AI Technical Summary

Technical Problem

In existing coal hydrogenation gasification methods, the use of high-pressure hydrogen to transport pulverized coal poses safety hazards such as hydrogen embrittlement, spontaneous combustion, and explosions caused by electrostatic sparks. In addition, the pipeline design is complex and the flow rate is unstable.

Method used

Inert gases such as nitrogen or carbon dioxide are used instead of high-pressure hydrogen to transport pulverized coal, and methanol pulverized coal is used as raw material. High-pressure transport is generated by inert gas, combined with screw feeder and mechanical agitation to ensure that pulverized coal and hydrogen are transported separately. The ratio of methanol in pulverized coal is 0.03-0.05:1, and the mixture enters the reactor in solid form after mixing.

Benefits of technology

It avoids the risks of hydrogen embrittlement and spontaneous combustion, reduces the possibility of explosion, improves the efficiency and product quality of the hydrogenation gasification reaction, reduces the amount of hydrogen used, and simplifies the design of the reaction device.

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Abstract

The present disclosure relates to a hydro-gasification method, which comprises: (1) using inert gas with a certain pressure to transport coal powder raw material to a gasification reaction device; (2) in the gasification reaction device, the coal powder raw material is subjected to a hydro-gasification reaction with hydrogen. In the hydro-gasification method provided by the present disclosure, the inert gas is used to replace high-pressure hydrogen to transport the coal powder, which can avoid the problem of "hydrogen brittleness" of the conveying pipeline, and can also avoid the problems of spontaneous combustion of the coal powder, explosion caused by static spark and the like; the coal powder raw material is replaced by methanol coal powder as the raw material, which can reduce the demand for hydrogen in the hydro-gasification process; the raw material is transported in a solid state, which can expand the conveying capacity range, reduce the number of reactor nozzles, and reduce the design difficulty of the hydro-gasification reaction device.
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