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Air-flow bed coal-gasification solid-state dreg-discharging method

A technology of solid slag removal and entrained flow bed, which is applied in the field of coal gasification, can solve the problems of unfavorable long-term operation of the gasification furnace, shorten the service life of the furnace internal parts, high consumption of raw coal and oxygen, and achieve lower operating temperature and less heat loss , the effect of prolonging the service life

Active Publication Date: 2009-05-27
XIAN ORIGIN CHEM TECH
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Problems solved by technology

Advanced coal gasification technology is a recognized clean coal unit technology. When using these as industrial raw materials, the existing coal gasification methods, whether using dry feed or wet feed, must make the operation of the gasifier When the temperature is increased, the ash associated with gasification is discharged in a liquid form. This method leads to the operation of the gasifier at high temperature, the consumption of raw coal and oxygen is relatively high, and the internal parts and refractory materials of the gasifier are operated at high temperature. state, which shortens the service life of the furnace internal parts, is not conducive to the long-term operation of the gasifier, and the gasification index is poor, which limits the application of this coal in industry

Method used

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Embodiment

[0018] For a domestic coal type, its ash content is 22.5wt%, ash melting point is 1480°C, wet feeding technology is adopted, the slurry concentration is 64wt%, liquid slagging gasification technology, the existing gasifier cannot operate normally, and it needs to Add flux, the addition amount is 50wt% of its ash content, the temperature operation of gasifier reaches 1420 ℃, can realize liquid state slagging, gasification pressure is 4.0Mpa, the effective gas (H 2 +CO) is 7743%, cold gas is 67.5%, and the production is 1000Nm 3 (H 2 +CO) coal consumption is 768kg, production 1000Nm 3 (H 2 +CO) Oxygen consumption is 432Nm 3 . Also use this coal type as raw material, wet feeding technology, slurry concentration of 64wt%, adopt the solid-state slagging gasification method of the present invention, without adding flux, operate at a temperature of 1350°C, and the gasification pressure is 4.0Mpa, Effective gas in crude gas (H 2 +CO) is 79.33%, and cold gas is 69.5%, producing 1...

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Abstract

The invention discloses a gas flow bed coal gasfication solid slag off method. The feature is controlling the operation temperature of aerification furnace to lower the ash fushing point of coal. The method sharply lowers operation temperature, prolongs useful life, and lowers cost. It expands the using range of raw material coal.

Description

technical field [0001] The invention belongs to the technical field of coal gasification, and in particular relates to a coal flow bed gasification operation method in a solid-state slag discharge mode. Background technique [0002] The domestic energy resource structure is dominated by coal, and coal with high ash content, high ash melting point, and high ash content and ash melting point occupies a certain share. Advanced coal gasification technology is a recognized clean coal unit technology. When using these as industrial raw materials, the existing coal gasification methods, whether using dry feed or wet feed, must make the operation of the gasifier When the temperature is increased, the ash associated with gasification is discharged in a liquid form. This method leads to the operation of the gasifier at high temperature, the consumption of raw coal and oxygen is relatively high, and the internal parts and refractory materials of the gasifier are operated at high temper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/54C10J3/74
CPCY02E20/18
Inventor 张勇门长贵贺根良郑化安徐红东徐宏伟薛薇李璞袁善录崔意华郑亚兰
Owner XIAN ORIGIN CHEM TECH