A gas injection device with retreating gas injection point in an underground gasification system

A gas injection point retreat, underground gasification technology, applied in coal gasification, underground mining, construction, etc., can solve the problems that the gas injection point cannot be opened automatically and the staff is inconvenient

A gas injection point retreat, underground gasification technology, applied in coal gasification, underground mining, construction, etc., can solve the problems that the gas injection point cannot be opened automatically and the staff is inconvenient

CN103352685BInactive Publication Date: 2015-09-23北京中矿科能煤炭地下气化技术研究中心
12 Cites 0 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A gas injection device with retreating gas injection point in an underground gasification system
  • A gas injection device with retreating gas injection point in an underground gasification system
  • A gas injection device with retreating gas injection point in an underground gasification system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] Such as Figure 1 to Figure 10 As shown, the present invention provides a gas injection point retreat type gas injection device placed in the underground gasification system in the roadway, including a gasification agent delivery pipe 1, the gasification agent delivery pipe 1 is divided into multiple sections, from figure 1 It can be seen from the figure that, preferably, two adjacent gasification agent delivery pipes 1 communicate through a connecting pipe 11 . Each section of the gasification agent delivery pipe 1 is respectively sleeved with a sleeve 9; preferably, the sleeve 9 is a cylindrical shell, from figure 2 It can be seen that the axis of the sleeve 9 and the axis of the gasification agent delivery pipe 1 are parallel to each other. Of course, the sleeve 9 can also be other shells with an upwardly convex top surface, such as spherical shells, upper hemispherical shells, upper semi-cylindrical shells, and the like. Like this, when roadway top coal seam drop...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a gas injection point retreating type gas injection device used in an underground gasification system. The gas injection device comprises gasifying agent delivery pipes respectively sleeved with sleeves; each sleeve is provided with at least one hole; one-way stop valves, slurry injection ports and gas injection ports are arranged on the parts of gasifying agent delivery pipes inside the sleeves; the slurry injection ports extend outwards to form slurry injection pipes; guiding holes are formed in the side walls of the slurry injection pipes; the gas injection ports are equipped with opening devices; each opening device comprises a sealing cover, a supporting rod, a one-way plug and a dragrope. According to the gas injection device provided by the invention, a rear gas injection point can be opened automatically while the slurry injection operation is started, and the rear gas injection point is opened without the aid of manual operation and control, thus providing great convenience for working personnel. Slurry injected in the gasifying agent delivery pipes is prevented from cracking, and a gasifying agent is prevented from flowing to the front gasified area through the one-way valves and cracks of the slurry.

Description

technical field [0001] The invention relates to the field of underground coal gasification production, in particular to a gas injection device with a retreating gas injection point in an underground gasification system. Background technique [0002] Due to the existence of a large amount of coal resources that cannot be mined artificially or are uneconomical by artificial mining, people have long begun to conduct research on coal gasification technology. The Chinese patent with publication number CN1298058A "An underground gasification system for producing coal gas in mines" Furnace", its structure lacks the gas injection control of the gas injection pipe in the coal seam, so there are insufficient coal seam combustion and low coal utilization rate; the Chinese patent of publication number CN1112188A "Pipe-drawing gas injection point retreat type coal seam gasification method" Use the fusing method to melt the gas injection pipe mouth section by section to realize the gas in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
23 Sep 2015
Publication
CN103352685B
IPC
E21B43/295
Inventors
王玲; 苏倩倩