Coal underground gasification on-way sampling simulation experiment system and method

A technology of underground gasification and simulation experiments, applied in coal gasification, underground mining, earth drilling and mining, etc., can solve the problem of low calorific value of synthesis gas, achieve the effects of reducing pollution, optimizing gas production, and changing temperature distribution

Pending Publication Date: 2022-04-29
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthetic gas produced by the existing underground coal gasification has a low calorific value; the by-products of the underground coal gasification reaction, including tar and particulate matter, have an impact on the underground environment

Method used

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  • Coal underground gasification on-way sampling simulation experiment system and method
  • Coal underground gasification on-way sampling simulation experiment system and method
  • Coal underground gasification on-way sampling simulation experiment system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] refer to Figure 1-5 , the present invention provides a technical solution, a simulated experimental system for sampling along the underground coal gasification process, including a gas supply device, a gasifier body, a sampling device along the process, and an analysis and testing device;

[0040]The main body of the gasifier includes a box body 1, the size of which is 746mm x 516mm x 519mm. The box body 1 can be placed on a support frame. The coal sample 5 is arranged in the box body 1, and the gasification channel 25 is arranged inside the coal sample 5. , the upper end of the box body 1 is evenly provided with five air outlet holes 10 along the process, the left and right ends of the box body 1 are respectively provided with an air inlet 3 and an air outlet 4, and the two ends of the gasification channel 25 are connected with the air inlet 3 and the air outlet respectively. The gas port 4 is connected, and the gas supply device is connected to the gas inlet 3 throug...

Embodiment 2

[0051] refer to Figure 1-5 , the present invention provides a kind of technical scheme, on the basis of embodiment 1, a kind of underground coal gasification sampling simulation experiment method along the process, adopts a kind of underground coal gasification sampling simulation experiment system along the process of embodiment 1, comprises the following step,

[0052] Step 1: Arrange the coal blocks 24 with grooves inside the box body 1, and the combined grooves of the coal blocks 24 after splicing form the gasification channel 25, and set the ignition device 31 inside the gasification channel 25, and the ignition device 31 is activated by electric Combination of firearms, alcohol cotton, and pulverized coal combustibles, four pieces of coal 24 with a size of 230mm x 115mm x 230mm are arranged inside the cavity of the gasifier, and the final size is 460mm x 230mm × 230mm, the coal block 24 is Shenmu bituminous coal, and the grooves processed in advance are spliced ​​into ...

Embodiment 3

[0063] On the basis of Example 2, in step 5, during the gasification experiment, open the second pure oxygen cylinder 41 and the second carbon dioxide cylinder 37, and adjust the fourth secondary decompression valve 7 and the third decompression The valve 40 is used to control the flow ratio of carbon dioxide and oxygen injected into the gasifier body through the gas injection pipe 901 along the process, so as to prevent insufficient gasification at a position far from the air inlet 3 and increase the composition of effective gas production; The air holes 9 are arranged between the air inlet 3 and the air outlet 4, so as to improve the gasification reaction efficiency and degree at different positions in the gasification channel 25. By controlling the amount of additional gasification agents such as oxygen and carbon dioxide, To control the degree of reaction in the gasification channel 25, the overall temperature can be increased, especially in the middle and rear sections, an...

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Abstract

The invention discloses a coal underground gasification on-way sampling simulation experiment system and method, and belongs to the technical field of coal underground gasification simulation. The coal underground gasification on-way sampling simulation experiment system comprises a gas supply device, a gasification furnace body, an on-way sampling device and an analysis test device; the gas supply device is connected with the gas inlet through a pipeline and is used for injecting a gasifying agent into the box body; the on-way sampling device is connected with the on-way gas outlet hole through a pipeline and is used for extracting tar, particulate matters and produced gas in the direction of the gasification channel after the coal sample is combusted and gasified; the analysis testing device comprises a produced gas analysis device and a temperature monitoring device, and is used for analyzing products after combustion and gasification of the coal sample and on-way characteristics of an internal temperature field of the coal sample; the on-way sampling device is combined with the tar separation bottle, the particle trapping net and the gas dryer, so that on-way characteristics of tar, particles and produced gas are monitored, and the gasification reaction process is deeply mastered.

Description

technical field [0001] The invention belongs to the technical field of underground coal gasification simulation technology, and relates to an underground coal gasification sampling simulation experiment system and method along the process. Background technique [0002] Underground coal gasification is a clean way to utilize coal resources in situ. It is a process of converting deep unminable coal resources into combustible gas through controllable coal combustion. Underground coal gasification, as a deep coal chemical mining method, can realize carbon dioxide capture and low-carbon utilization of coal by using carbon dioxide as a gasification agent. [0003] At present, in the field of underground coal gasification, many countries have carried out a large number of field tests. The synthetic gas produced by the existing underground coal gasification has a low calorific value; the by-products of the underground coal gasification reaction, including tar and particulate matter...

Claims

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Application Information

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IPC IPC(8): E21B43/295E21B49/08E21B47/00
CPCE21B43/295E21B49/081E21B47/00
Inventor 冯乐乐董脉帆秦波涛周思博邵国华陈素贞丁仰卫
Owner CHINA UNIV OF MINING & TECH
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