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Coal gasification system combined slag removal device and its application method

A technology for coal gasification and gasification furnace, which is applied in gasification process, granular/powder fuel gasification, manufacture of combustible gas, etc., can solve the problems of poor ash fluidity, affecting continuous operation, clogging of horizontal flue, etc. , to achieve the effect of improving stability, extending equipment operating cycle and enhancing stability

Active Publication Date: 2021-11-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem that when the operating temperature of the existing entrained entrained bed gasification furnace is low, the fluidity of the ash in the waste heat boiler becomes poor, resulting in the deposition of ash and slag, which blocks the horizontal flue of the U-shaped gasifier and affects the continuous operation, and even causes The problem of security incidents

Method used

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  • Coal gasification system combined slag removal device and its application method

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specific Embodiment approach 1

[0025] Embodiment 1: The joint slag removal device of the coal gasification system in this embodiment includes a gasifier 2, a waste heat boiler 1, a horizontal flue 3, a waste heat boiler lower slag port 5, a gasifier lower slag port 4, and a vertical downpipe 6. Inclined downpipe 7 and combined slag collection system 8, U-shaped gasification reaction zone is formed between gasifier 2 and waste heat boiler 1 through horizontal flue 3, waste heat boiler lower slag outlet 5 is located at the bottom of waste heat boiler 1, gasification The lower slag port 4 is located at the bottom of the gasifier 2, one end of the vertical downpipe 6 communicates with the lower slag port 4 of the gasifier, and the other end of the vertical downpipe 6 is connected with the slag pool 9 in the combined slag collection system 8 One end of the inclined descending pipe 7 communicates with the lower slag outlet 5 of the waste heat boiler, the other end of the inclined descending pipe 7 communicates wit...

specific Embodiment approach 2

[0028] Embodiment 2: This embodiment differs from Embodiment 1 in that the flushing water tank 14 is provided with a water inlet pipe 12 .

specific Embodiment approach 3

[0029] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the angle between the inclined descending tube 7 and the horizontal plane is 15°-80°.

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Abstract

A combined slag removal device for a coal gasification system and its application method. The present invention aims to solve the problem that when the operating temperature of the existing entrained entrained bed gasification furnace is low, the fluidity of the ash in the waste heat boiler becomes poor, resulting in the deposition of ash and slag and causing U-shaped gasification. The blockage of the horizontal flue of the furnace affects the continuous operation. In the combined slag removal device of the coal gasification system of the present invention, the lower slag port of the waste heat boiler is located at the bottom of the waste heat boiler, the lower slag port of the gasifier is located at the bottom of the gasifier, and one end of the vertical downpipe communicates with the lower slag port of the gasifier. The other end of the straight downcomer communicates with the slag pool in the combined slag collection system, one end of the inclined downcomer communicates with the slag outlet of the waste heat boiler, and the other end of the inclined downcomer communicates with the vertical downcomer. In the present invention, a slag outlet is provided at the bottom of the waste heat boiler, so that the slag in the waste heat boiler falls directly, avoiding the forced shutdown of the gasification equipment caused by the blockage of the horizontal flue due to the change of working conditions, and enhancing the stability of operation , and can improve gasification efficiency and synthesis gas quality.

Description

technical field [0001] The invention relates to a combined slag removal device for coal gasification and a slag removal method using the device. Background technique [0002] my country is the world's largest coal producer and consumer. Coal accounts for about 60% of my country's primary energy consumption structure. Most of the coal is used in the form of direct combustion. The resulting coal-burning pollutants have caused serious damage to the ecological environment. severe pollution. Coal gasification technology is one of the most important clean coal technologies. Coal gasification technology can be used to produce industrial fuel gas, civil fuel gas, chemical synthesis raw material gas, synthetic fuel oil raw material gas, hydrogen fuel cells, synthetic natural gas, rocket fuel, etc. At present, the main coal gasification technologies include moving bed (fixed bed) gasification, fluidized bed gasification, entrained bed gasification and molten bed gasification. The adv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/48C10J3/72
CPCC10J3/485C10J3/72C10J2300/093Y02P20/129
Inventor 曾令艳郑智巍陈智超李争起
Owner HARBIN INST OF TECH