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Clean gas preparation method and preparation system

A preparation system and coal gas technology, applied in the field of coal gasification, can solve the problems of large investment scale, long investment cycle, and unsuitability for small and medium-sized coal chemical enterprises, and achieve the effects of improving utilization rate, avoiding waste, and reducing scale

Active Publication Date: 2019-06-14
KEDA MAS CLEAN ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention provides a clean gas preparation method and preparation system to solve the problems of large investment scale, long investment period and unsuitable application to small and medium-sized coal chemical enterprises in the prior art entrained gasification technology

Method used

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  • Clean gas preparation method and preparation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] figure 1 It is a flow chart of the clean gas preparation method provided by Embodiment 1 of the present invention. like figure 1 As shown, the clean gas preparation method provided in this embodiment comprises the following steps:

[0046] S101, conveying the pulverized coal to the normal and low pressure gas generator under pressure;

[0047] Specifically, the main component of pulverized coal is C, containing a small amount of H, O, S, N, Si, etc., the water content of pulverized coal is less than 2%, and the particle size of pulverized coal particles is more than 90% (mass percentage) less than 100 microns.

[0048] Pressurized conveying, specifically refers to through the pulverized coal conveying system, using N 2 or CO 2 As a carrier gas, the pulverized coal is blown to the normal and low pressure gas generator.

[0049] S102. Make the pulverized coal and the gasification agent undergo a gasification reaction in the normal and low pressure gasifier to genera...

Embodiment 2

[0077] figure 2 The flow chart of the clean gas preparation method provided by Embodiment 2 of the present invention, such as figure 2 As shown, the clean gas preparation method provided in this embodiment also includes:

[0078] Prepare raw coal into coal powder;

[0079] After quenching the mixture of molten crude gas and slag with the quenching medium to obtain separated crude gas and slag, it also includes:

[0080] Collect slag and discharge the collected slag regularly;

[0081] Specifically, before the pulverized coal is pressurized and transported to the normal and low-pressure gasifier, the raw coal can be prepared into pulverized coal by crushing, grinding, drying, filtering and other steps. The moisture content of the pulverized coal is less than 2%, and 90 % (mass percentage) or more of the pulverized coal particles have a particle diameter less than 100 microns. After chilling the mixture of molten crude gas and slag with the chilling medium to obtain the se...

Embodiment 3

[0095] image 3 A schematic structural diagram of the clean gas preparation system provided in Embodiment 3 of the present invention, such as image 3 As shown, the clean gas preparation system provided in this embodiment includes a pulverized coal conveying system 1, a gasification reaction system 2, a cascade waste heat utilization system 3, a dry-wet combined dust removal unit 4, and a desulfurization unit 5;

[0096] The pulverized coal conveying system 1 is used to convey the pulverized coal to the gasification reaction system 2 under pressure;

[0097] The gasification reaction system 2 includes a multifunctional combined burner 21, an atmospheric and low pressure gas generator 22 and a chilling unit 23; the atmospheric and low pressure gas generator 22 is used to provide a reaction place for the gasification reaction of pulverized coal and gasification agent; The multifunctional combined burner 21 is used to ignite and increase the temperature of the normal and low pre...

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Abstract

The invention provides a clean gas preparation method and a preparation system. According to the clean gas preparation method, pulverized coal and a gasification agent are subjected to gasification reaction in a constant-low-pressure gas generation furnace, and the scale of a clean gas preparation system can be reduced so that the clean gas preparation method can be applied to medium-and-small-sized coal chemical enterprises. Besides, heat in raw gas is recycled stage by stage, the utilization rate of the heat can be increased, and heat waste is avoided. Besides, the heat in the cooled raw gas is recycled again through a gas cooler, heat waste can be further avoided, and the utilization rate of energy is increased.

Description

technical field [0001] The invention relates to coal gasification technology, in particular to a clean coal gas preparation method and preparation system. Background technique [0002] Compared with the combustion of coal, the combustion of gas is cleaner and more efficient; coupled with my country's energy pattern of "rich in coal, poor in oil, and low in gas", coal gas as a clean energy is attracting increasing attention. At present, coal gasification technology mainly includes fixed bed gasification technology, fluidized bed gasification technology and entrained bed gasification technology. [0003] Fixed bed gasification technology refers to using lump coal as gasification raw material, using air, water vapor and oxygen as gasification agent, adding lump coal to the coal gasifier from the top of the gasifier, and adding the gasifier from the gasifier The bottom of the generator is fed into the gas generator, and the lump coal is converted into gas through gas-solid reve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/46C10J3/72C10J3/84
CPCC10J3/46C10J3/72C10J3/84C10J2300/06C10J2300/0936C10J2300/1603
Inventor 刘欣彭敏王人杰黄成龙刘淑媛李新春蒋芹
Owner KEDA MAS CLEAN ENERGY
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