Coal gasification and coal coking co-supply and cogeneration system and method

A technology of coal gasification and coal coking, which is applied in fixed bed gasification, bulk chemical production, granular/powdered fuel gasification, etc., can solve the problem of unsatisfactory energy-saving effect of the unit production system, and achieve improved coal utilization efficiency, effective Effects of Utilization and Emission Reduction

Active Publication Date: 2014-08-27
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] Another object of the present invention is to provide a cogeneration method of coal gasification and coal coking, the method takes c

Method used

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  • Coal gasification and coal coking co-supply and cogeneration system and method
  • Coal gasification and coal coking co-supply and cogeneration system and method
  • Coal gasification and coal coking co-supply and cogeneration system and method

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Embodiment 1

[0039] Coal gasification and coal coking cogeneration system of the present invention is used to co-produce the olefin production process, the process is as follows figure 2 Shown:

[0040] The coal water slurry 25 made of raw coal enters the coal gasification unit 1 (gasifier) ​​together with the oxygen 26 obtained by air separation, and undergoes an oxidation reaction to obtain the coal gasification crude synthesis gas 10, and then the coal gasification crude synthesis gas 10 passes through the water The coal conversion unit 2 adjusts the hydrogen-carbon ratio to obtain the converted coal gasification crude synthesis gas 11, and the converted coal gasification crude synthesis gas 11 enters the synthesis gas purification unit 3 (acid gas removal unit) to remove sulfides 29 and carbon dioxide 14 to obtain purification After the coal gasification synthesis gas 12, the obtained purified coal gasification synthesis gas 12 enters the first chemical synthesis unit 4 (methanol synt...

Embodiment 2

[0046] Coal gasification and coal coking combined supply and cogeneration system of the present invention are used for cogeneration and cogeneration of methanol and natural gas, and the process is as follows image 3 Shown:

[0047] The coal water slurry 25 made of raw coal enters the coal gasification unit 1 (gasifier) ​​together with the oxygen 26 obtained by air separation, and undergoes an oxidation reaction to obtain the coal gasification crude synthesis gas 10, and then the coal gasification crude synthesis gas 10 passes through the water The coal conversion unit 2 adjusts the hydrogen-carbon ratio to obtain the converted coal gasification crude synthesis gas 11, and the converted coal gasification crude synthesis gas 11 enters the synthesis gas purification unit 3 (acid gas removal unit) to remove sulfur in the coal gasification crude synthesis gas 11 29 and carbon dioxide 14 to obtain purified coal gasification synthesis gas 12, and the obtained purified coal gasificat...

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Abstract

The invention discloses a coal gasification and coal coking co-supply and cogeneration system and method. The method comprises the following steps: preparing a coal-gasified crude synthesis gas from a part of raw material coal by a coal gasification process; obtaining clean coal-gasified crude synthesis gas and carbon dioxide after cooling, transforming and purifying the coal-gasified crude synthesis gas; feeding the clean coal-gasified crude synthesis gas into a chemical synthesis process to prepare a chemical product; preparing coke and a crude coke oven gas from the other part of raw material coal by the coal coking process, enabling a part of obtained coke to react with the carbon dioxide obtained in the coal gasification process to prepare carbon monoxide; purifying the obtained crude coke oven gas to obtain a clean coke oven gas, and then mixing the carbon monoxide with the clean coke oven gas according to a ratio, and then preparing a coal-coked synthesis gas; and feeding the coal-coked synthesis gas into a chemical synthesis process to prepare a chemical product. The coal utilization efficiency is effectively improved while energy conservation and emission reduction are realized in a co-supply manner of recovering CO2 produced in the coal gasification process and transporting to the coal coking process to generate the synthesis gas.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical industry, and specifically relates to a coal gasification and coal coking cogeneration system and method. Background technique [0002] Coal gasification and coal coking are two main ways of comprehensive utilization of coal. The coal gasification process is to gasify coal to produce syngas. The syngas adjusts the hydrogen-carbon ratio through water-coal conversion, and then it is used for chemical synthesis. The coal coking process produces coke through high-temperature dry distillation of raw coal, and at the same time obtains coke oven gas, coal tar and other products. [0003] The coal chemical process with coal gasification as the core has high energy consumption and accumulated CO 2 issues such as large emissions. cause CO 2 The main reason for the large emissions and high energy consumption is that the hydrogen-to-carbon ratio of the crude synthesis gas produced during the c...

Claims

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Application Information

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IPC IPC(8): C10J3/46C10J3/48C10J3/84C10J3/20C10J3/06C10B53/00
CPCC10B53/00C10J3/06C10J3/20C10J3/46C10J3/48C10J3/84Y02P20/10Y02P20/54
Inventor 钱宇满奕杨思宇
Owner SOUTH CHINA UNIV OF TECH
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