Underground coal gasification ignition device and ignition method thereof
An underground gasification and ignition device technology, which is applied in coal gasification, underground mining, construction, etc., can solve the problems that the ignition method is not suitable for well-less underground gasification furnaces, and achieve the effects of easy implementation, simple method, and easy control
Pending Publication Date: 2017-12-12
XINJIANG GUOLIHENG CLEAN ENERGY TECH CO LTD
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[0007] In view of this, the present invention proposes an ignition device for underground coal gasification, which aims to solve the problem that the ignition method in the prior art is not suitable for wellless underground gasification furnaces
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[0028] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0029] Device example:
[0030] Those skilled in the art should understand that underground coal gasification technology includes: inlet boreholes, gas outle...
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The invention provides an underground coal gasification ignition device and an ignition method thereof. The underground coal gasification ignition device comprises a conveying pipe. The conveying pipe is used for being arranged in a well-cementing casing pipe of a gas inlet drill hole, a first end of the conveying pipe is connected with the ground surface, a second end of the conveying pipe is suspended in a coal bed, and the conveying pipe is used for conveying self-igniting gas to the coal bed; a gap between the conveying pipe and the well-cementing casing pipe forms an annular space, a first end of the annular space is closed, a second end of the annular space is open and corresponds to the coal bed, a gas input port is formed in the first end of the annular space, and the gas input port is used for conveying combustion-supporting gas into the annular space; and the second end of the annular space is used for conveying the combustion-supporting gas into the coal bed, and the self-igniting gas is used for self-igniting to ignite the coal bed after being mixed with the combustion-supporting gas. According to the underground coal gasification ignition device and the ignition method thereof, the coal bed can be more conveniently and rapidly ignited, implementation is easy, so that coal bed combustion is convenient to control, ignition of the coal bed can be accurately ensured, and the underground coal gasification ignition device and the ignition method thereof are particularly suitable for a non-well underground gasification furnace.
Description
technical field [0001] The invention relates to the technical field of underground coal gasification, in particular to an ignition device for underground coal gasification and an ignition method thereof. Background technique [0002] Underground coal gasification is the process of controlled combustion of underground coal to generate combustible gas through pyrolysis and chemical action of coal. To realize underground coal gasification, the underground coal seam must first be ignited, and igniting coal with a high underground water content, or even coal that has been soaked for a long time, is a key technology for underground coal gasification. [0003] There are two main processes for underground coal gasification: underground gasification without wells and underground gasification with wells. Well-type underground gasification is to manually develop roadways and arrange underground gasifiers in the coal seam, so that people can go down into the coal seam and make sufficie...
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IPC IPC(8): E21B43/295
CPCE21B43/295
Inventor 徐斌郑林张树川杜慧华徐军
Owner XINJIANG GUOLIHENG CLEAN ENERGY TECH CO LTD