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Coal underground gasification furnace and method

An underground gasification and coal technology, applied in coal gasification, underground mining, construction, etc., can solve the problems of blocked intake, low gas outlet, and inability to ensure the continuity of gasification process operation, so as to ensure continuity and avoid excessive gasification. secondary ignition effect

Active Publication Date: 2015-05-06
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the gasification process, because the fire area burns near the inlet channel and the outlet channel is low, it is very easy to block the outlet channel due to coal seam caving and ash layer rising.
After the blockage, the air intake will be blocked and the gasification cannot continue, and the furnace must be shut down for treatment, which cannot ensure the continuity of the gasification process

Method used

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  • Coal underground gasification furnace and method
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  • Coal underground gasification furnace and method

Examples

Experimental program
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Embodiment 1

[0047] see figure 1 , the preferred embodiment of the underground coal gasifier of the present invention includes a roof 1, a coal seam 2 below the roof 1, an air inlet 3 that enters the coal seam 2 after vertically passing through the roof 1, and enters the coal seam after vertically passing through the roof 1 The gas outlet 4 of 2, the gas outlet channel 6 and the ignition hole 7 located in the coal seam 2 and connected to the gas outlet 4 are generally horizontal and located in the coal seam 2 and connected to the air inlet channel 5 of the air inlet 3. The air inlet channel 5 is located below the air outlet channel 6, and a freely traveling gas injection pipe is arranged in the air inlet channel 5 for inputting gasification agent. The ignition hole 7 passes through the top plate 1 vertically or at a certain inclination angle and then enters the coal seam 2 and communicates with one end of the air inlet passage 5 and the air outlet passage 6 away from the air inlet 3 and th...

Embodiment 2

[0061] see Figure 4 , Figure 4 It is a schematic plan view of Embodiment 2 of the underground coal gasifier of the present invention. This embodiment is based on Embodiment 1 and adopts a multi-column combined gasification method for gasification. The coal underground gasification furnace includes several first gasification units and a second gasification unit, wherein each first gasification unit includes a first air inlet 11, 21, 31, 41 and Correspondingly communicated first air intake channels 13, 23, 33, 43 that are approximately horizontal in the coal seam, a first air outlet 12, 22, 32, 42 that passes through the top plate and enters the coal seam, and correspondingly communicated with the The roughly horizontal first air outlet channels 14, 24, 34, 44. The second gasification unit includes a second air intake hole 51 and a second air intake channel 53 , a second air outlet hole 52 and a second air outlet channel 54 corresponding to the second air intake hole 51 , an...

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Abstract

The invention provides a coal underground gasification furnace. The coal underground gasification furnace comprises a top plate (1), a coal layer (2), a gas inlet (3), a gas outlet (4), a gas intake channel (5), a gas exhaust channel (6) and an ignition hole (7), wherein the coal layer (2) is located below the top plate (1), the gas inlet (3) enters the coal layer (2) after penetrating through the top plate (1), the gas outlet (4) enters the coal layer (2) after penetrating through the top plate (1), the gas intake channel (5) is horizontally located in the coal layer (2) and communicated with the gas inlet (3), the gas exhaust channel (6) is horizontally located in the coal layer (2) and communicated with the gas outlet (4), the gas intake channel (5) is located below the gas exhaust channel (6), and the ignition hole (7) penetrates through the top plate (1), then enters the coal layer (2) and is communicated with the gas intake channel (5) and the gas exhaust channel (6). The invention further provides a method used for gasification through the gasification furnace. According to the coal underground gasification furnace and method, the ignition hole is designed, so that the gas exhaust channel is prevented from being blocked, and gasification continuity is guaranteed.

Description

technical field [0001] The invention relates to the field of coal mining, in particular to an underground coal gasification furnace and a gasification method. Background technique [0002] Underground coal gasification is the process of controlled combustion of underground coal to generate combustible gas through thermal and chemical effects on coal. [0003] In the existing underground coal gasifier, the gasification agent is sent into the coal seam through the air inlet passage, and the coal is gasified in the underground coal seam and then output to the ground through the gas outlet passage. During the gasification process, because the fire area burns near the inlet channel and the outlet channel is low, it is very easy to block the outlet channel due to coal seam caving and ash layer rising. After the blockage, the air intake will be blocked and the gasification cannot continue. The furnace must be shut down for processing, and the continuity of the gasification process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/295
CPCE21B43/295
Inventor 刘清宇
Owner ENN SCI & TECH DEV