Method, device and system for determining internal combustion void area of coal underground gasifier
A technology for underground gasification and air-burning area, which is applied in coal gasification, underground mining, construction, etc., can solve the problems of excessive movement of coal strata, gas leakage, and pollution of the environment in the air-fueled area, and achieves the scope of realization, the expansion law, and the realization of The effect of real-time monitoring
Active Publication Date: 2016-05-18
ENN SCI & TECH DEV
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Problems solved by technology
In addition, the increasing exposure of the roof and floor of the coal seam may cause excessive movement, cracking, damage and surface subsidence of the coal strata above the burn-out area, resulting in gas leakage in the burn-out area or overflowing the surface to pollute the environment, making the gasifier unable to operate normally
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[0027] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
[0028] figure 1 It is a flow chart of a method for determining the internal combustion void area of an underground coal gasifier provided by an embodiment of the present invention. Such as figure 1 As shown, the method for determining the internal combustion void area of an underground coal gasifier includes: step 11 to step 13.
[0029] In step 11, according to the surface radioactive material concentration above the underground coal gasifier collected in real time, the preset temperature contour of the underground coal gasifier at the current moment is obtained.
[0030] For example, before the underground coal gasification furnace gasifies the coal seam, according to the needs of the underground gasification site, enough reasonable detection points can be arranged on the ground directly fac...
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The invention discloses a method, device and system for determining the internal combustion void area of an underground coal gasifier. The method includes: obtaining the underground coal gasification at the current moment according to the concentration of radioactive substances on the surface above the underground coal gasifier collected in real time. The preset temperature contour of the furnace; obtain the preset gas volume output by the underground coal gasification furnace, and the preset gas volume is the preset gas volume output by the underground coal gasifier from the initial moment to the current moment The amount of gas, the initial moment is the moment when the preset temperature is generated, and the preset gas is the gas produced in the burn-out area in the preset state in the underground coal gasifier; according to the acquired The preset temperature contour and the preset gas volume determine the burn-out area in the preset state in the underground coal gasifier at the current moment. The real-time monitoring of the range and expansion law of the internal combustion void area of the underground coal gasifier can be realized.
Description
technical field [0001] The invention relates to an underground coal gasification technology, in particular to a method, device and system for determining the internal combustion void area of an underground coal gasification furnace. Background technique [0002] Underground coal gasification is the process of converting underground coal into combustible gas in situ through thermochemical reactions. [0003] Before gasification, at least two boreholes need to be drilled down from the ground into the coal seam. Among them, one borehole (hereinafter referred to as the air intake hole) is used to output gasification agents such as air, water vapor, oxygen-enriched air, etc. to the coal seam to gasify the coal seam; The combustible gas is transported to the ground (hereinafter referred to as the vent hole). [0004] Because the natural permeability of the coal seam is very poor, before the gasification agent is input into the coal seam through the air inlet hole, it is necess...
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IPC IPC(8): E21B43/295
Inventor 梁桂玲
Owner ENN SCI & TECH DEV