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Method for controlling spontaneous combustion of underground coal and developing and utilizing

A coal spontaneous combustion and ground control technology, applied in underground mining, ground mining, earth drilling and mining, etc., can solve the problems of ineffectiveness, waste of resources, pollution, etc., and achieve the effects of slowing down the spread, saving money, and avoiding pollution

Active Publication Date: 2019-02-15
杨昌玮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

People use the method of covering the ground with oxygen to prevent fire and injecting inert gas into the ground to put out the fire. The country spends a lot of money every year to organize specialized institutions and personnel to put out the fire, but the results have been minimal, the pollution is serious, and a lot of resources are wasted.
There has been no suitable method and technology for ground fire utilization, and the utilization technology of ground fire resources has been blank for a long time

Method used

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  • Method for controlling spontaneous combustion of underground coal and developing and utilizing
  • Method for controlling spontaneous combustion of underground coal and developing and utilizing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 controls ground fire and utilizes the method for its thermal energy

[0047] Principle: artificially intervene in the combustion conditions of the ground fire 4, control the air entering the passage underground to participate in the combustion of the ground fire 4, and form a certain negative pressure in the high-temperature area of ​​the ground fire by the induced draft fan 12, thereby collecting the high-temperature smoke of the ground fire 4, Through the screen pipe 3, it is pumped to the ground by the sleeve pipe 2, and after exchanging heat with the heat exchanger 11, the heat energy of the ground fire 4 can be utilized through the waste heat utilization device 14, and the flue gas of the ground fire 4 can be treated by the environmental protection treatment device 13 Environmental protection treatment to achieve pollution control.

Embodiment approach

[0049] 1. Carry out geological exploration and ground temperature surveys in the area where ground fires occur, according to the geological structure and distribution of ground fires, as well as the conditions of coal seams that may participate in fires, ground topographical conditions, surface soil permeability and surface cracks, etc. Factors, divide the Earthfire 4 area into several blocks.

[0050] 2. At a reliable position in each block, one or more boreholes are drilled in the direction of the ground fire 4, and the depth reaches near the combustion center of the ground fire 4 or goes deep into the burning coal seam to form a production well 1.

[0051] 3. Place the screen 3 in each borehole of the production well 1. The screen 3 is made of a pipe (the material is required to be able to withstand high temperatures above 900°C) with an outer diameter smaller than the inner diameter of the production well (subject to being able to be placed in the well smoothly). Drill air...

Embodiment 2

[0060] Embodiment 2 The method of controlling ground fire and adjusting flue gas components to produce syngas

[0061] Principle: After investigating the combustion conditions of the ground fire 4, man-made intervenes in its combustion conditions, controls the passage of air entering the ground to participate in the combustion of the ground fire 4, and drills one or more drill holes to the appropriate position of the ground fire 4 combustion bed to form an auxiliary Well 15, through the auxiliary well 15, transports water or steam and other tempered gases to the combustion bed of the ground fire 4 to participate in combustion, changes the carbon-hydrogen ratio of the flue gas components of the ground fire 4, and produces syngas that meets the needs of chemical production. The induced draft fan 12 is pumped to the ground through the screen pipe 3 and the sleeve pipe 2, and after exchanging heat with the heat exchanger 11, the heat energy is utilized through the waste heat utiliz...

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Abstract

The invention belongs to the technical field of underground resource development and utilization, and relates to a method for controlling spontaneous combustion of underground coal and developing andutilizing. After clearly surveying spontaneous combustion of the underground coal and the geological conditions, a spontaneous combustion area is divided into a plurality of blocks; drill holes are formed from the blocks to an underground spontaneous combustion area to form a production well, high temperature flue gas from underground coal combustion is extracted to the ground by an induced draftfan through the production well, and a certain negative pressure is formed in the underground combustion area; the ground of a certain area near the production well is blocked off, air is forced fromthe periphery of the sealing area into the underground to participate in combustion, and the volume of a combustion bed is controlled; and the high temperature flue gas extracted to the ground is exchanged into thermal energy through a heat exchanger to generate electricity or supply heat, and the flue gas is treated centrally. In addition, water and other raw materials can be sent to the underground combustion area artificially to adjust the carbon hydrogen ratio of high temperature flue gas, and producing qualified synthetic gas is extracted to the ground for chemical production. According to the method for controlling spontaneous combustion of the underground coal and developing and utilizing, the process is simple, comprehensive utilization of resources is achieved, pollution is controlled, economic and social benefits are good, and industrialized development can be achieved.

Description

technical field [0001] The invention belongs to the technical field of development and utilization of underground resources, and in particular relates to a method for controlling spontaneous combustion of underground coal and developing and utilizing it. Background technique [0002] Coal, as the main primary energy source in my country, is rich in reserves and widely distributed. However, the temperature of coal exposed to the air will gradually rise due to oxidation and heat release. When it catches fire, it will cause combustion, which is called coal seam spontaneous combustion. Some coal seams are prone to spontaneous combustion due to their relatively high sulfur content and poor airtightness of the overlying layer; especially the gangue discharged during the coal mining process is piled up into mountains, which are relatively loose and easy to enter the air and cause the coal to spontaneously ignite. [0003] For a long time, spontaneous combustion (hereinafter referre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21C37/16
CPCE21C37/16E21C41/18
Inventor 杨昌玮杨世梁
Owner 杨昌玮
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