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Fixed bed-fluidized bed coupled gasification method and apparatus

A technology of fixed-bed gasifier and fluidized-bed gasifier, which is applied in joint combustion mitigation, combustible gas production, petroleum industry, etc. It can solve the problems of high carbon content and low carbon conversion rate, and reduce tar content , Improve the conversion rate of carbon, the effect of quality increase

Active Publication Date: 2009-05-27
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional fluidized bed gasification method has a high carbon content in the ash, resulting in low carbon conversion

Method used

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  • Fixed bed-fluidized bed coupled gasification method and apparatus
  • Fixed bed-fluidized bed coupled gasification method and apparatus
  • Fixed bed-fluidized bed coupled gasification method and apparatus

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Experimental program
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Effect test

Embodiment 1

[0019] Such as figure 1 As shown, the device of the present invention includes an integral shell 1, the inner chamber of the integral shell 1 is a fixed bed gasifier 2 and a fluidized bed gasifier 3, the top of the fixed bed gasifier 2 is connected with the fluidized bed gasifier The bottom of 3 communicates with a throat 4, and a refractory and heat insulating material is arranged between the overall shell 1 and the inner cavity.

[0020] The upper part of the fixed bed gasifier 2 is provided with a fixed bed feed inlet 5, the lower part of the fixed bed gasifier 2 is provided with a fixed bed gasification agent inlet 6, and the bottom of the fixed bed gasifier 2 is provided with a fixed bed ash outlet 7 .

[0021] The lower cone of the fluidized bed gasifier 3 is provided with a water vapor inlet 8 in the circumferential direction, and the fluidized bed gasifier 3 above the water vapor inlet 8 is provided with a fluidized bed oxygen inlet 9, and the fluidized bed oxygen inl...

Embodiment 2

[0025] Such as figure 2 As shown, the structure of this embodiment is basically the same as that of the above-mentioned embodiment, the difference is that: on the throat pipe 4 connected between the fixed bed gasifier 2 and the fluidized bed gasifier 3, a valve with several ventilation holes is arranged. 15 sieve plates 16 (such as image 3 shown), the throat 4 above the sieve plate 16 is separately provided with a fluidized bed ash outlet 17 (such as figure 2 shown), the ash can be discharged from the fluidized bed ash outlet 17 through the ash discharge screw. Concrete ash discharge screw etc. are prior art, no longer repeat them.

Embodiment 3

[0027] The fixed bed-fluidized bed integrated gasification method of the present invention comprises the following steps:

[0028] 1) The gasification raw material with a particle size of 10-50 mm is fed into the fixed bed gasifier 2 in normal operation through the fixed bed feed port 5 of the fixed bed gasifier 2, and at the same time, water vapor is mixed with pure oxygen or oxygen-enriched The gas is used as a gasification agent to enter the fixed-bed gasification furnace 2 from the lower fixed-bed gasification agent inlet 6, so that the gasification raw material and the gasification agent are contacted and gasified in the fixed-bed gasification furnace 2 in countercurrent, and the gasification raw material and gasification agent are gasified. A gasification reaction occurs to produce gas and ash.

[0029] 2) The ash generated in the fixed bed gasifier 2 is discharged from the fixed bed ash outlet 7 at the bottom, and the gas generated in the fixed bed gasifier 2 rises and ...

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Abstract

The invention relates to a method and a device for coupling gasification of a fixed bed and a fluid bed, wherein the method comprises the following steps: 1) connecting the fluidized bed gasifier with the top of a fixed bed gasifier through a hollow throat; 2) adding a gasification raw material with the particle size of between 10 and 50 millimeters to the fixed bed gasifier from the upper part of the fixed bed gasifier, and inputting a gasification agent to the fixed bed gasifier from the lower part of the fixed bed gasifier simultaneously; 3) raising coal gas generated through gasification reaction and introducing the coal gas into the fluidized bed gasifier through the hollow throat; 4) adding the gasification raw material with the particle size of less than 10 millimeters to the fluidized bed gasifier from a dense phase zone of the fluidized bed gasifier, and inputting water vapor and pure oxygen or enriched oxygen to the fluidized bed gasifier from the lower part thereof simultaneously; and 5) exhausting coal gas generated through the mixing gasification of the high temperature coal gas, the gasification raw materials, the water vapor and the pure oxygen or the enriched oxygen in the fluidized bed gasifier from a coal gas outlet of the fluidized bed gasifier. The method and the device have the advantages of simplified gas producing process, short flow, compact equipment, small occupied area, reduced amount of sewage emission, low cost and the like, and can be widely applied to medium and small-sized coal chemical enterprises in China.

Description

technical field [0001] The invention relates to a gasification method and device, in particular to a fixed bed-fluidized bed coupled gasification method and device. Background technique [0002] With the economic development, the demand for industrial gas and synthetic gas in my country is increasing day by day. Coal gasification technology is widely used in metallurgy, chemical industry, building materials, machinery and other industrial industries and civil gas. Coal gasification technology is mainly divided into fixed bed, fluidized bed and entrained bed gasification, atmospheric pressure coal gasification mainly adopts fixed bed and fluidized bed. [0003] Atmospheric fixed bed gasification technology is mainly based on mixed generator, UGI (UGI (atmospheric fixed bed coal gasification), water gas furnace, two-stage mixed generator, two-stage water gas furnace, etc., which have the advantages of simple operation, less investment Larger and lower equipment cost. However...

Claims

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Application Information

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IPC IPC(8): C10J3/00
CPCY02E20/18
Inventor 董卫果邓一英王鹏文芳杨宗仁戢绪国徐春霞张科达
Owner CCTEG CHINA COAL RES INST
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