Movable ignition system for UCG (underground coal gasification)

An underground gasification and ignition system technology, applied in coal gasification, underground mining, combustion ignition, etc., can solve the problems that the ignition technology cannot achieve continuous operation, the operation process is unstable, and the ignition efficiency is low, so as to reduce the risk of explosion, The effect of reducing the number of drilling wells and increasing the success rate of ignition

Active Publication Date: 2015-01-07
PEKING UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an ignition system to overcome the problems that the existing ignition technology cannot realize continuous operation, low ignition efficiency, unstable operation process and low safety

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  • Movable ignition system for UCG (underground coal gasification)

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Embodiment Construction

[0019] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] figure 1 Shows a schematic structural view of the underground coal gasification mobile ignition system of this embodiment, referring to the diagram, it includes a movable ignition device 1 arranged underground in the coal, and the ground gas that is connected to the ignition device 1 through a gas pipeline 3 The supply system (not shown in the figure), supplies the ignition gas from the ground to the ignition device 1 through the gas pipeline 3; passes through the coal seam 10 to connect the coal underground and the air intake pipe 9 on the ground, and passes through the air intake pipe 9 from the ground to the coal underground. Air or oxygen is provided for igniti...

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Abstract

The invention discloses a movable ignition system for UCG (underground coal gasification), which comprises a movable ignition device, an overground gas supply system and a gas feeding pipe, wherein the movable ignition device is arranged on underground coal; the overground gas supply system is connected with the ignition device through a gas pipeline, and is used for supplying ignition gas for the ignition device from the ground through the gas pipeline; and the gas feeding pipe passes through a coal bed and communicates the underground coal with the overground coal, and is used for providing ignition air or oxygen for the underground coal from the ground. The ignition system disclosed by the invention can overcome a defect that a traditional igniter can not carry out secondary ignition quickly when a flameout phenomenon occurs in the process of gasification, and can move arbitrarily according to the needs of ignition in the process of gasification, thereby guaranteeing the continuity and timeliness of an ignition process, and saving time and labor; the movable ignition system can enlarge the scale of a gasification furnace, reduce the number of drilled wells, lower the production cost, and improve the production progress; especially for the underground gasification of deep and ultra-deep coal, the ignition system can significantly lower the operation cost; and due to a single gas pipeline design, the ignition process is safer, and the explosion hazard is reduced.

Description

technical field [0001] The invention relates to the related field of underground coal gasification technology, in particular to a mobile ignition system for underground coal gasification. Background technique [0002] Coal is the main energy source today and even in the next few decades, and its efficient and comprehensive mining and utilization are related to the national economy and the people's livelihood. Especially in the new situation of energy saving and emission reduction, the application of clean coal technology has been put on the agenda of various countries. Underground coal gasification is a high-efficiency mining method that introduces gasification agents into underground coal seams to allow coal to be burned in a controlled manner, and the combustible gases produced are exported to the ground for comprehensive utilization. Underground coal gasification technology can significantly and effectively reduce CO 2 emissions, reduce surface pollution, especially for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/295F23Q13/02
Inventor 王习东梁锦平
Owner PEKING UNIV
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