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Coal gasification system and method using supercritical carbon dioxide as gasifying agent

A carbon dioxide and supercritical technology, applied in the field of coal gasification system, to increase the rate, reduce the use of water vapor, and improve the gasification intensity

Pending Publication Date: 2017-09-19
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology

In the published reports, for example, Chinese patent CN 101381629A discloses a carbon dioxide emission-reducing dry pulverized coal gasifier, the gasification agent is still mainly water and oxygen, and carbon dioxide is used as a supplementary gasification agent. Carbon dioxide coal slurry preparation and gasification system, mixing liquid carbon dioxide and coal to make coal slurry, sending it to the gasifier for gasification, but there has been no report on using supercritical carbon dioxide as a gasification agent for coal gasification

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  • Coal gasification system and method using supercritical carbon dioxide as gasifying agent

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Embodiment Construction

[0021] The present invention is described in further detail below in conjunction with accompanying drawing:

[0022] refer to figure 1 The coal gasification system using supercritical carbon dioxide as gasification agent according to the present invention includes a gasification furnace system, a coal gas purification system, and a carbon dioxide sequestration and utilization system 10, wherein the gasification furnace system includes a pulverized coal pressurization device 2, a combustion Nozzle 4 and gasifier 5, gas purification system includes gas cooler 8, gas purification system, chilled gas compressor 1, carbon dioxide separation system 6, carbon dioxide compressor 3 and chilled heat exchanger 7; pulverized coal pressurization device 2 The outlet of the burner 4 is connected with the pulverized coal inlet of the burner 4, and the burner 4 is provided with an oxygen inlet, and the outlet of the burner 4 is connected with the raw material inlet of the gasification furnace ...

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Abstract

The invention discloses a coal gasification system and a coal gasification method using supercritical carbon dioxide as a gasifying agent. The coal gasification system comprises a gasification furnace system, a coal gas purification system and a carbon dioxide storage and utilization system, wherein the gasification furnace system comprises a pulverized coal pressurization device, a burner nozzle and a gasification surface; the coal gas purification system comprises a coal gas cooler, a gas purification system, a chilling gas compressor, a carbon dioxide separation system, a carbon dioxide compressor and a chilling heat exchanger. By using the system and the method, the supercritical carbon dioxide can be used as the gasifying agent for the gasification of coal.

Description

technical field [0001] The invention belongs to the field of coal gasification and relates to a coal gasification system and method using supercritical carbon dioxide as a gasification agent. Background technique [0002] Coal gasification refers to the process in which coal reacts with gasification agent at high temperature in the gasifier to generate coal gas. The basic conditions of the coal gasification process are: gasifier, gasification raw material and gasification agent. The gasifier is the core equipment of coal gasification, and the gasification agent is oxygen or air and water vapor. Coal gasification process is the basis of coal chemical industry, IGCC, coal indirect liquefaction, etc. After coal gasification, synthesis gas is produced, and the effective components are CO, H 2 and CH 4 , for chemical synthesis or combustion power generation. Most of the existing gasification processes are self-heating gasification, that is, the gasification process does not r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/48C10K1/02C10K1/08
CPCC10J3/48C10K1/02C10K1/08C10J2300/1603C10J2300/0936C10J2300/0969Y02E20/18Y02P20/54
Inventor 张纯聂鹏李红智姚明宇杨玉高炜
Owner XIAN THERMAL POWER RES INST CO LTD
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