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Underground gasification stove and gasification method thereof

An underground gasification and gas injection technology, which is applied in coal gasification, underground mining, construction, etc., can solve the problems of large number of gasifier wells, long construction time, poor economic benefits, etc., to reduce the construction time , Reduce the difficulty of building furnaces and improve economic benefits

Active Publication Date: 2015-05-27
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this scheme is: the number of wells to be drilled is relatively large, including vertical wells and horizontal wells, and the economic benefits are poor; at the same time, it is necessary to penetrate each group of gas wells with pressure, and it is often difficult to obtain better results for such penetration methods. Effect: the number of wells drilled by the gasifier is large, and it takes a long time to build the furnace, which cannot improve economic benefits

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  • Underground gasification stove and gasification method thereof
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Embodiment 1

[0044] Such as figure 1 Shown is the first embodiment of the underground gasifier of the present invention. The underground gasifier includes a basic gas inlet and outlet unit consisting of a first directional well 1 and at least one second directional well 2 . There are three second directional wells 2 in this embodiment, and the three second directional wells 2 are all arranged on the same side of the first directional well 1 .

[0045]The first directional well 1 and the second directional well 2 are arranged at a certain angle, and the included angle is preferably 30-90 degrees, 90 degrees in this embodiment. In this embodiment, each second directional well 2 is located on the same horizontal plane, and the horizontal distance between adjacent second directional wells 2 is 15-20 meters. Correspondingly, the first directional well 1 is also arranged horizontally, so that each second directional well 2 can communicate with the first directional well 1 .

[0046] The proce...

Embodiment 2

[0054] Such as figure 2 Shown is the second embodiment of the underground gasifier of the present invention. The underground gasifier of this embodiment includes a basic gas inlet and outlet unit consisting of a first directional well 1 and a plurality of second directional wells 2 . In this embodiment, there are six second directional wells 2, and the six second directional wells 2 are respectively arranged on both sides of the first directional well 1, and are arranged substantially symmetrically.

[0055] The first directional well 1 and the second directional well 2 are arranged at a certain angle, and the included angle is preferably 30-90 degrees, 90 degrees in this embodiment. In this embodiment, each second directional well 2 is located on the same horizontal plane, and the horizontal distance between adjacent second directional wells 2 is 15-20 meters. Correspondingly, the first directional well 1 is also arranged horizontally, so that each second directional well ...

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Abstract

The invention discloses an underground gasification stove and a gasification method thereof. The underground gasification stove comprises a first directional well and at least one second directional well, wherein the first directional well and the second directional well intersect at an inclined angle and are connected, wherein during ignition, the first directional well is taken as an intake system and one second directional well is taken as an exhaust system; during production, the first directional well is taken as the exhaust system and the second directional wells are taken as the intake systems. According to the underground gasification stove and the gasification method thereof, through reasonably arranging the arrangement manner of the directional wells and setting the gasification time, the underground gasification of coal can be completed by only one first directional well. On the one hand, the well drilling number is greatly reduced, a process for pressure cut-through is reduced, the furnace construction difficulty is reduced and the economic benefit is improved; on the other hand, the furnace construction time of the gasification furnace is shortened, the construction of a furnace profile is completed in the gasification process, so that the economic benefit is further improved.

Description

technical field [0001] The invention relates to the technical field of underground coal gasification, in particular to an underground gasification furnace and a gasification method thereof. Background technique [0002] Underground coal gasification is the process of burning underground coal in a controlled manner and generating combustible gas through thermal and chemical effects on coal. The wellless underground gasification technology has been developed for many years and has achieved a series of achievements. However, there are still many aspects worthy of improvement in its gasification efficiency and gasification method. [0003] The shape of the underground gasifier is related to the efficiency and operation mode of the underground gasification. The traditional underground gasifier is composed of a pair of vertical wells. The gas production of this type of gasifier is relatively small, and it is difficult to accumulate a large amount of heat energy in a small combust...

Claims

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Application Information

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IPC IPC(8): E21B43/295
CPCE21B43/295
Inventor 赵娟刘洪涛王媛媛付伟贤
Owner ENN SCI & TECH DEV