Igniter for underground coal gasification

Abstract

The utility model discloses an igniter for coal underground gasification, which comprises a transverse cylinder, a support column is fixed at the bottom edge of the outer side of the transverse cylinder, the bottom position of the support column is attached to the horizontal ground, and the left side position of the transverse cylinder is communicated with an oxygen uptake box; one end of the oxygen uptake mechanism is connected with the igniter body through an air inlet pipe, and the bottom of the igniter body extends into the drilling position. An injection mechanism is further arranged at the top of the transverse cylinder, and a vertical pipe of the injection mechanism is embedded into the outer end of the fuel tank. According to the igniter for underground coal gasification, the oxygen uptake mechanism is arranged, gas can be absorbed through a through hole formed in one side of an oxygen uptake box through the oxygen uptake mechanism, the gas is conveyed to the output end of the igniter body through a gas inlet pipe, efficient ignition treatment can be facilitated through gas conveying, and the gas is conveyed to a combustion position through a nozzle; ignition treatment can be carried out more easily through ignition treatment of the through holes.

Description

Technical Field

[0001] This utility model relates to the technical field of underground coal gasification, specifically to an igniter for underground coal gasification. Background Technology

[0002] Underground coal gasification involves burning and gasifying underground coal into coal gas within the coal seam, which is then transported to the surface for use as an energy source or chemical feedstock. It is particularly suitable for coal seams that are unminable or uneconomical to mine using conventional methods, as well as for secondary or multiple mining operations in coal mines. The product gas can be processed and transported through pipelines, or it can be used directly for power generation or chemical synthesis. Therefore, underground coal gasification technology offers significant economic and environmental benefits, greatly improving the utilization rate and level of coal resources. It is an important research and development direction for clean coal technology in various countries. Therefore, an igniter is required when using underground coal gasification.

[0003] Existing coal underground gasification igniters still have some shortcomings in use. Due to the certain depth of the borehole and the relatively damp bottom of the borehole, the risk of combustibles extinguishing during combustion is relatively high, which makes it impossible to ignite the coal seam and reduces the ignition success rate.

[0004] To solve the above problems, one can refer to the prior art (Chinese patent application number CN201320821149.7, publication date 2014-05-28) which discloses a coal underground gasification ignition device. Before ignition, the moisture at the bottom of the borehole can be discharged by high-pressure air, and a dry environment is formed at the bottom of the borehole, which reduces the risk of the combustible material going out during combustion and improves the ignition success rate.

[0005] Although the above-mentioned device can solve the existing problems, it still has certain shortcomings in use. During the ignition process, it is necessary to ensure sufficient oxygen. However, the existing igniter is located inside the borehole, and the oxygen level at its bottom is relatively low, which leads to certain shortcomings in the ignition process.

[0006] Therefore, we proposed that an igniter for underground coal gasification can effectively solve the above problems. Utility Model Content

[0007] The purpose of this utility model is to provide an igniter for underground coal gasification, in order to solve the problem mentioned in the background art that current igniters on the market need to ensure sufficient oxygen during the ignition process, but existing igniters are set inside the borehole, and the oxygen content at the bottom is relatively low, resulting in relatively low ignition efficiency.

[0008] To achieve the above objectives, this utility model provides the following technical solution: an igniter for underground coal gasification, comprising a horizontal cylinder, a support column fixed at the bottom edge of the outer side of the horizontal cylinder, the bottom of the support column being in contact with the horizontal ground, and an oxygen inhalation box being connected to the left side of the horizontal cylinder.

[0009] The oxygen box is also provided with several sets of through holes on the outside. A drive motor is fixedly installed on the rear side of the horizontal cylinder. The output end of the drive motor is connected to the outside of the oxygen inhalation mechanism. One end of the oxygen inhalation mechanism is connected to the igniter body through the air inlet pipe. The bottom of the igniter body extends into the drilled hole.

[0010] An injection mechanism is also provided at the top of the horizontal cylinder, and the vertical tube included in the injection mechanism is embedded at the outer end of the fuel tank.

[0011] As a preferred technical solution of this application, the bottom of the fuel tank is connected to the top of the pump body and the feed pipe, the bottom of the feed pipe extends into the interior of the horizontal cylinder and is connected to the side wall of the vertical pipe, and a nozzle is also installed at the bottom of the vertical pipe near the upper end of the igniter body.

[0012] As a preferred technical solution of this application, the lower ends of the vertical tube and the air intake tube are wound around the outside of the rope reel, the inner side of the vertical tube is arranged in a ring, and the inner side of the vertical tube is attached to the outer side of the air intake tube.

[0013] As a preferred technical solution of this application, the oxygen inhalation mechanism includes an end of a crankshaft fixedly connected to the output end of a drive motor, the other end of the crankshaft being rotatably disposed inside the horizontal cylinder, the protruding outer side of the crankshaft being rotatably connected to the end of a connecting rod, the other outer side of the connecting rod being connected to the outer side of a movable shaft, one side of the movable shaft being fixed to the edge of a moving disk, a piston rod being fixed to the side of the moving disk away from the movable shaft, the outer side of the piston rod being slidably disposed inside the inhalation pipe, the outer sides of both ends of the inhalation pipe being fixed to the inner side of a partition, the outer edge of the partition being fixed to the inner wall of the oxygen inhalation chamber, the end of the inhalation pipe near the through hole being connected to an inlet pipe via a five-way valve, and the bottom end of the inlet pipe extending out of the bottom of the horizontal cylinder and connected to the top of the igniter body.

[0014] As a preferred technical solution of this application, a one-way air inlet valve is also installed on the side of the air inlet pipe near the through hole, and a one-way air outlet valve is provided at the end of the air inlet pipe connected to the five-way valve.

[0015] As a preferred technical solution of this application, one end of the piston rod is attached to the inner side of the suction pipe, and the piston rod forms a back-and-forth moving structure with the inner wall of the suction pipe through the moving disk.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This igniter for underground coal gasification is equipped with an oxygen intake mechanism. This mechanism allows gas to be absorbed through a through-hole on one side of the oxygen tank and transported to the output end of the igniter body via an inlet pipe. This gas transport facilitates efficient ignition. Furthermore, the injection mechanism allows combustible liquid inside the fuel tank to be transported through the feed pipe and vertical pipe, and then delivered to the combustion position via a nozzle. The through-hole ignition process further facilitates ignition. Specific details are as follows:

[0017] 1. A drive motor is installed, which drives the crankshaft to rotate. This allows for the coordinated arrangement of the connecting rod and the movable shaft, enabling the moving disc to move the piston rod inside the intake pipe. This ensures stable gas delivery through the intake pipe and delivers the gas to the output end of the igniter body, resulting in more efficient ignition.

[0018] Furthermore, an air intake pipe is provided, with a one-way air intake valve at the end of the air intake pipe and a one-way air outlet valve at the connection point of the air intake pipe through the five-way valve, which can effectively and continuously deliver gas.

[0019] Furthermore, multiple sets of piston rods and suction pipes are installed, which enable efficient gas delivery and processing.

[0020] 2. A fuel tank is installed, and the combustible liquid in the fuel tank is transported by a pump, so that the combustible liquid is injected stably through the feed pipe, the vertical pipe and the nozzle.

[0021] Furthermore, a vertical pipe is installed, which is arranged in a ring shape and is separated from the air intake pipe, allowing for independent conveying and processing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure of the horizontal cylinder of this utility model;

[0025] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0026] Figure 5 This is a schematic diagram of the main structure of the movable axis of this utility model;

[0027] Figure 6 This is a schematic diagram of the main cross-sectional structure of the vertical tube of this utility model.

[0028] In the diagram: 1. Horizontal cylinder; 2. Support column; 3. Oxygen box; 4. Through hole; 5. Drive motor; 6. Crankshaft; 7. Connecting rod; 8. Movable shaft; 9. Moving disc; 10. Piston rod; 11. Inhalation pipe; 12. Baffle plate; 13. Intake pipe; 14. Igniter body; 15. Fuel tank; 16. Feed pipe; 17. Vertical pipe; 18. Nozzle. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-6 The present invention provides the following technical solution:

[0031] Example 1: To address the issue that existing igniters on the market require sufficient oxygen during ignition, but the oxygen level at the bottom of the drilled hole is relatively low, resulting in low ignition efficiency, please refer to the attached... Figure 1 - Appendix Figure 5The system includes a horizontal cylinder 1, with a support column 2 fixed at the bottom edge of the outer side of the horizontal cylinder 1. The bottom of the support column 2 is flush with the horizontal ground. An oxygen inhalation box 3 is connected to the left side of the horizontal cylinder 1. Several sets of through holes 4 are opened on the outer side of the oxygen inhalation box 3. A drive motor 5 is fixedly installed at the rear side of the horizontal cylinder 1. The output end of the drive motor 5 is connected to the outside of the oxygen inhalation mechanism. One end of the oxygen inhalation mechanism is connected to the igniter body 14 through an air inlet pipe 13. The bottom of the igniter body 14 extends into the drilled hole. The oxygen inhalation mechanism includes the end of a crankshaft 6 fixedly connected to the output end of the drive motor 5. The other end of the crankshaft 6 is rotatably disposed inside the horizontal cylinder 1. The convex part of the crankshaft 6... The outer end of the connecting rod 7 is rotatably connected to the end of the connecting rod 7. The outer end of the connecting rod 7 is connected to the outer end of the movable shaft 8. One side of the movable shaft 8 is fixed to the edge of the moving disk 9. The piston rod 10 is fixed to the side of the moving disk 9 away from the movable shaft 8. The outer side of the piston rod 10 is slidably disposed on the inner side of the suction pipe 11. The outer ends of the suction pipe 11 are fixed to the inner side of the partition 12. The outer edge of the partition 12 is fixed to the inner wall of the oxygen box 3. The end of the suction pipe 11 near the through hole 4 is also connected to the air inlet pipe 13 through a five-way valve. The bottom end of the air inlet pipe 13 extends out of the bottom of the horizontal cylinder 1 and is connected to the top of the igniter body 14. A one-way air intake valve is installed on the side of the air intake pipe 11 near the through hole 4, and a one-way air outlet valve is provided at the end of the air intake pipe 11 that is connected to the five-way valve; one end of the piston rod 10 is attached to the inner side of the air intake pipe 11, and the piston rod 10 forms a back-and-forth moving structure with the inner wall of the air intake pipe 11 through the moving disk 9.

[0032] By starting the drive motor 5, the output end of the drive motor 5 can drive the crankshaft 6 to rotate inside the cross cylinder 1. The crankshaft 6 drives the rotating connecting rod 7 and the movable shaft 8 to move. The movable shaft 8 can drive the movable disk 9 and the piston rod 10 to slide back and forth stably inside the intake pipe 11. The gas flows into the intake pipe 13 through the one-way intake valve and the through hole 4 on one side of the intake pipe 11. A one-way exhaust valve is set between the intake pipe 11 and the five-way valve, which allows the gas to be delivered into the intake pipe 13. The gas is then delivered to one side of the igniter body 14 through the intake pipe 13. The gas is then delivered to the drilling position through the output end of the igniter body 14, ensuring the oxygen content in the ignition area and thus ensuring efficient ignition.

[0033] Example 2: For more efficient ignition processing, please refer to the attached document. Figure 1 Appendix Figure 2 and attached Figure 6An injection mechanism is also provided at the top of the horizontal cylinder 1, and the vertical tube 17 included in the injection mechanism is embedded at the outer end of the fuel tank 15. The bottom end of the fuel tank 15 is connected to the pump body and the top of the feed pipe 16. The bottom end of the feed pipe 16 extends into the interior of the horizontal cylinder 1 and connects to the side wall of the vertical tube 17. A nozzle 18 is also installed at the bottom of the vertical tube 17 near the upper end of the igniter body 14. The lower ends of the vertical tube 17 and the air intake pipe 13 are wound around the outside of the winder coil, and the inner side of the vertical tube 17 is annular, fitting against the outer side of the air intake pipe 13.

[0034] To ensure efficient ignition of underground coal gasification, combustible liquid is injected into the feed pipe 16 through the fuel tank 15. Through continuous pumping, combustible oil is efficiently injected into the through groove of the vertical pipe 17. Continuous pressurization causes the combustible liquid to be sprayed out through the nozzle 18. The injection of fuel can effectively ensure the ignition efficiency of the igniter body 14 in the later stage.

[0035] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An igniter for underground coal gasification, comprising a horizontal cylinder (1), a support column (2) fixed at the bottom edge of the outer side of the horizontal cylinder (1), the bottom of the support column (2) being attached to the horizontal ground, and an oxygen inhalation box (3) being connected to the left side of the horizontal cylinder (1). Its features are: The oxygen box (3) is provided with several sets of through holes (4) on the outside. A drive motor (5) is fixedly installed on the rear side of the horizontal cylinder (1). The output end of the drive motor (5) is connected to the outside of the oxygen inhalation mechanism. One end of the oxygen inhalation mechanism is connected to the igniter body (14) through the air inlet pipe (13). The bottom of the igniter body (14) extends into the drill hole. An injection mechanism is also provided at the top of the horizontal cylinder (1), and the vertical tube (17) included in the injection mechanism is embedded at the outer end of the fuel tank (15).

2. The igniter for underground coal gasification according to claim 1, characterized in that: The injection mechanism includes a feed pipe (16) connected to the bottom of the fuel tank (15) via a pump body. The bottom of the feed pipe (16) extends into the interior of the horizontal cylinder (1) and is connected to the side wall of the vertical pipe (17). A nozzle (18) is also installed at the bottom of the vertical pipe (17) near the upper end of the igniter body (14).

3. The igniter for underground coal gasification according to claim 2, characterized in that: The lower ends of the vertical tube (17) and the air intake tube (13) are wound around the outside of the rope coil. The inner side of the vertical tube (17) is arranged in a ring, and the inner side of the vertical tube (17) is attached to the outer side of the air intake tube (13).

4. The igniter for underground coal gasification according to claim 1, characterized in that: The oxygen inhalation mechanism includes a crankshaft (6) fixedly connected to the output end of a drive motor (5). The other end of the crankshaft (6) is rotatably disposed inside a cross cylinder (1). The protruding outer side of the crankshaft (6) is also rotatably connected to the end of a connecting rod (7). The other outer side of the connecting rod (7) is connected to the outer side of a movable shaft (8). One side of the movable shaft (8) is fixed to the edge of a moving disc (9). A movable disc (9) is also fixed to the side of the moving disc (9) away from the movable shaft (8). The piston rod (10) is slidably disposed on the outer side of the intake pipe (11). The outer ends of the intake pipe (11) are fixed to the inner side of the partition plate (12). The outer edge of the partition plate (12) is fixed to the inner wall of the oxygen box (3). The end of the intake pipe (11) near the through hole (4) is also connected to the air inlet pipe (13) through a five-way valve. The bottom end of the air inlet pipe (13) extends out of the bottom of the horizontal cylinder (1) and is connected to the top of the igniter body (14).

5. An igniter for underground coal gasification according to claim 4, characterized in that: A one-way air inlet valve is also installed on the side of the air inlet pipe (11) near the through hole (4), and a one-way air outlet valve is provided at the end of the air inlet pipe (11) that is connected to the five-way valve.

6. An igniter for underground coal gasification according to claim 4, characterized in that: One end of the piston rod (10) is attached to the inner side of the suction pipe (11), and the piston rod (10) forms a back-and-forth moving structure with the inner wall of the suction pipe (11) through the moving disk (9).

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