Coal mine ventilation air methane oxidation device

Abstract

The invention discloses a coal mine ventilation air methane oxidation device, and relates to the technical field of methane oxidation, the coal mine ventilation air methane oxidation device comprises an outer shell, the bottom end of the outer shell is fixedly provided with a base, the inner wall of the outer shell is fixedly provided with an inner shell, and the inner wall of the inner shell is fixedly provided with a first threaded air groove and a second threaded air groove; the base and the outer shell form a main body structure of the device, a gap is reserved between the outer shell and the inner shell and can be filled with a heat insulation material so as to reduce heat loss, ventilation air methane can pass through the first threaded air groove and the second threaded air groove in the circulation period, and the ventilation air methane can pass through the first threaded air groove and the second threaded air groove. The first threaded air groove and the second threaded air groove can prolong the staying time of ventilation air methane in the inner shell, so that the ventilation air methane can be sufficiently preheated and oxidized in the inner shell, the oxidation degree of the ventilation air methane can be increased under the condition that the overall size of equipment is not increased, and the service life of the ventilation air methane is prolonged. The problem that one of space and energy consumption can only be selected in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of gas oxidation, in particular to a coal mine ventilation gas oxidation device. Background Art

[0002] Coal mine exhaust gas, also known as coal mine wind exhaust gas, refers to the exhaust gas discharged from the mine ventilation system with a methane concentration of less than 0.75%. During the production process of coal mines, a large amount of ventilation is required to remove gas, harmful gases and dust, while providing fresh air. During this process, the operation of equipment inside the mine and the self-heating of the ore increase the air temperature, forming heat-containing exhaust gas, namely exhaust air.

[0003] The main components of exhaust air include oxygen, nitrogen, water vapor and a small amount of harmful gases in the air, such as methane and carbon dioxide. The exhaust air temperature is usually higher than the external ambient temperature and has a certain thermal energy value; but the methane concentration is extremely low and the utilization technology is difficult. For a long time, it can only be discharged into the atmosphere, causing greenhouse gas pollution.

[0004] Currently, the common treatment of exhaust gas usually uses catalytic combustion technology to treat low-concentration methane, thereby achieving methane oxidation and reducing pollutant emissions.

[0005] The conventional disposal method is to extract the exhaust gas in the coal mine through a ventilator and inject it into a treatment tank, and use a heating device in the treatment tank to heat it to oxidize the methane. However, this measure has a disadvantage. When the exhaust gas in the coal mine is just extracted from the mine, the temperature of the gas is usually maintained between 2°C and 30°C. The specific temperature needs to be determined according to the actual situation in the mine. However, in order to quickly heat and oxidize the exhaust gas, the air needs to be preheated. However, conventional preheating will increase the space occupied by the equipment. In order to reduce the overall size of the oxidation equipment, several heating devices are usually added to increase the heating speed. However, this method is undoubtedly more energy-consuming. Therefore, the existing technology can only choose between space and energy consumption. Summary of the invention

[0006] The purpose of the present invention is to provide a coal mine ventilation gas oxidation device to solve the problems raised in the prior art.

[0007] To achieve the above object, the present invention provides the following technical solution: a coal mine ventilation gas oxidation device, comprising an outer shell, a base is fixedly installed at the bottom end of the outer shell, an inner shell is fixedly installed on the inner wall of the outer shell, and a threaded air slot 1 and a threaded air slot 2 are fixedly installed on the inner wall of the inner shell;

[0008] A preheating cylinder is fixedly mounted on the inner surface of the first threaded air slot, a groove is provided inside the first threaded air slot, and the groove is connected to the inside of the preheating cylinder;

[0009] Two guide tubes and two heating rods are provided inside the second threaded air slot, a heating cylinder is fixedly installed on the inner wall of the second threaded air slot, and a coil is fixedly installed on the inner wall of the heating cylinder;

[0010] A plurality of heat-conducting nets are installed on the outer surface of the second threaded air slot, and the heat-conducting nets are connected to the outer surface of the heating rod and the guide tube.

[0011] Preferably, an air inlet pipe is provided inside the base, a top shell is fixedly mounted on the top end of the outer shell, and an exhaust port is provided on the inner side of the top shell.

[0012] Preferably, a drainage shell is fixedly mounted on the inner top wall of the preheating cylinder, a mounting frame is fixedly mounted on the inner wall of the drainage shell, a water pump is fixedly mounted on the outer surface of the mounting frame, and the output end of the water pump is fixedly mounted on the inner wall of the drainage shell.

[0013] Preferably, a water pipe 1 is fixedly installed at the input end of the drainage shell, the outer surface of the water pipe 1 is fixedly installed with the inner wall of the drainage shell, and the water pipe 1 passes through the heating cylinder and is located at the center of the coil.

[0014] Preferably, the top end of the water pipe 1 is connected to the top end of the guide pipe, and the interior of the water pipe 1 and the interior of the guide pipe are interconnected.

[0015] Preferably, a second water pipe is fixedly installed at the bottom end of the guide pipe, the other end of the second water pipe is fixedly installed on the outer surface of the preheating cylinder, and the interior of the second water pipe is connected to the space between the preheating cylinder and the drainage shell.

[0016] Preferably, a diverter plate is fixedly mounted on the bottom end of the preheating cylinder, and a plurality of vents are provided in a circular array on the inner side of the diverter plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present application, the base and the outer shell form the main structure of the device through the cooperation between the inner shell, the threaded air trough 1, the threaded air trough 2, the outer shell and the base, and a gap is reserved between the outer shell and the inner shell. This gap can be filled with insulation material to reduce heat loss, and the exhaust gas will pass through the threaded air trough 1 and the threaded air trough 2 during circulation. The threaded air trough 1 and the threaded air trough 2 can increase the residence time of the exhaust gas in the inner shell, so that the exhaust gas can be sufficiently preheated and oxidized in the inner shell, thereby increasing the oxidation degree of the exhaust gas without increasing the overall size of the equipment, solving the problem that the prior art can only choose between space and energy consumption.

[0019] 2. In the present application, through the cooperation between the threaded air trough, the heating rod and the guide tube, the heat emitted by the heating rod can heat and oxidize the exhaust gas near the central area through the heat-conducting network, thereby improving the heating efficiency.

[0020] 3. In the present application, through the cooperation between the guide pipe, water pipe 2, preheating cylinder, drainage shell, water pipe 1 and water pump, the heat transfer liquid in the preheating cylinder can enter the guide pipe through water pipe 2, spirally flow upward to water pipe 1, and then enter the next circulation flow through the coil heating and the drive of the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the external structure of a coal mine ventilation gas oxidation device according to the present invention;

[0022] Figure 2 This is a schematic diagram of the outer shell and inner shell structure of a coal mine ventilation gas oxidation device of the present invention;

[0023] Figure 3 This is a schematic diagram of the overall structure of the inner shell of a coal mine ventilation gas oxidation device according to the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the inner shell heating cylinder and the preheating cylinder of a coal mine exhaust gas oxidation device of the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of a preheating cylinder of a coal mine exhaust gas oxidation device according to the present invention;

[0026] Figure 6 It is a schematic diagram of the internal planar structure of a heating cylinder of a coal mine exhaust gas oxidation device of the present invention;

[0027] Figure 7 It is a structural schematic diagram of a threaded air duct 1 and a threaded air duct 2 of a coal mine exhaust gas oxidation device of the present invention;

[0028] Figure 8 It is a schematic diagram of the overall internal cross-section of a coal mine ventilation gas oxidation device of the present invention;

[0029] Fig. 9 The present invention is a schematic diagram of the installation position of the heat conduction network of a coal mine ventilation gas oxidation device.

[0030] Numbers in the figure: 1. Outer shell; 2. Base; 3. Inner shell; 4. Threaded air slot one; 5. Threaded air slot two; 6. Groove; 7. Preheating cylinder; 8. Guide pipe; 9. Heating rod; 10. Heating cylinder; 11. Coil; 12. Inlet pipe; 13. Top shell; 14. Drainage shell; 15. Mounting bracket; 16. Water pump; 17. Water pipe one; 18. Water pipe two; 19. Diverter plate; 20. Vent. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example: Figure 1-Figure 9 As shown, the present invention provides a technical solution for a coal mine exhaust gas oxidation device, including an outer shell 1, a base 2 is fixedly installed at the bottom end of the outer shell 1, an inner shell 3 is fixedly installed on the inner wall of the outer shell 1, and a threaded air groove 1 4 and a threaded air groove 2 5 are fixedly installed on the inner wall of the inner shell 3. The base 2 and the outer shell 1 constitute the main structure of the equipment, and a gap is reserved between the outer shell 1 and the inner shell 3, and this gap can be filled with heat-insulating material to reduce heat loss. During the circulation, the exhaust gas will pass through the threaded air groove 1 4 and the threaded air groove 2 5. The threaded air groove 1 4 and the threaded air groove 2 5 can increase the residence time of the exhaust gas in the inner shell 3, so that the exhaust gas can be sufficiently preheated and oxidized in the inner shell 3, thereby increasing the oxidation degree of the exhaust gas without increasing the overall volume of the equipment, thereby solving the problem that the prior art can only choose between space and energy consumption.

[0033] A preheating cylinder 7 is fixedly installed on the inner surface of the threaded air groove 4, and a groove 6 is opened inside the threaded air groove 4. The groove 6 and the interior of the preheating cylinder 7 are interconnected. The interior of the preheating cylinder 7 is filled with heat-conducting liquid. The heat-conducting liquid can flow in the threaded air groove 4 through the groove 6, and then can preheat the exhaust gas flowing through the threaded air groove 4.

[0034] Two guide tubes 8 and two heating rods 9 are provided inside the threaded wind slot 25. A heating tube 10 is fixedly installed on the inner wall of the threaded wind slot 25. A coil 11 is fixedly installed on the inner wall of the heating tube 10. The heating rod 9 can heat and oxidize the exhaust gas flowing through the threaded wind slot 25. The guide tube 8 can also assist in heating the exhaust gas that has not been fully preheated to increase the heating rate. The coil 11 is a high-frequency induction heating device as a whole, which can use the magnetic field to quickly heat its interior. The heating tube 10 cooperates with the threaded wind slot 25 to guide the exhaust gas to flow in a spiral upward manner.

[0035] Several heat-conducting nets are installed on the outer surface of the threaded air groove 2 5, and the heat-conducting nets are connected to the outer surfaces of the heating rod 9 and the guide tube 8. The heat emitted by the heating rod 9 can heat and oxidize the exhaust gas near the central area through the heat-conducting nets, thereby improving the heating efficiency.

[0036] An air intake pipe 12 is provided inside the base 2, a top shell 13 is fixedly installed on the top of the outer shell 1, and an exhaust port is provided on the inner side of the top shell 13. An external fan can draw the exhaust gas in the mine into the air intake pipe 12 through the air intake pipe 12, and enter the inner bottom of the inner shell 3 through the air intake pipe 12. After layers of heating and oxidation, it is connected to the next-level processing equipment through the exhaust port of the top shell 13.

[0037] A drainage shell 14 is fixedly installed on the inner top wall of the preheating tube 7, a mounting frame 15 is fixedly installed on the inner wall of the drainage shell 14, a water pump 16 is fixedly installed on the outer surface of the mounting frame 15, the output end of the water pump 16 is fixedly installed on the inner wall of the drainage shell 14, the space between the drainage shell 14 and the preheating tube 7 is used for the flow of heat transfer liquid, the water pump 16 can pour the heat transfer liquid downward to the bottom of the drainage shell 14, and enter the position between the drainage shell 14 and the preheating tube 7 and flow upward, the mounting frame 15 can provide support for the water pump 16, while the heat transfer liquid flows upward, it can also preheat the exhaust gas passing through it through the threaded air slot 4.

[0038] A water pipe 17 is fixedly installed at the input end of the drainage shell 14. The outer surface of the water pipe 17 is fixedly installed with the inner wall of the drainage shell 14. The water pipe 17 passes through the heating tube 10 and is located at the center of the coil 11. The water pipe 17 is made of copper and can heat the heat transfer liquid inside the water pipe 17 to one hundred degrees Celsius. The water pump 16 is used to make the heating liquid enter a continuous circulation heating.

[0039] A water pipe 2 18 is fixedly installed at the bottom end of the guide tube 8, and the other end of the water pipe 2 18 is fixedly installed on the outer surface of the preheating tube 7. The interior of the water pipe 2 18 is connected to the space between the preheating tube 7 and the drainage shell 14. The top of the water pipe 1 17 is connected to the top of the guide tube 8. The interior of the water pipe 1 17 and the interior of the guide tube 8 are connected to each other. The heat transfer liquid in the preheating tube 7 can enter the guide tube 8 through the water pipe 2 18, spirally flow upward to the water pipe 17, and then enter the next circulation flow under the heating of the coil 11 and the drive of the water pump 16.

[0040] A diverter plate 19 is fixedly installed at the bottom end of the preheating cylinder 7, and a plurality of vents 20 are provided in a circular array on the inner side of the diverter plate 19. When the exhaust gas just enters the lower position inside the inner cylinder, it will enter the top of the diverter plate 19 through the vents 20 provided on the diverter plate 19, and pass through the threaded air slot 1 4 and the threaded air slot 2 5 in turn. The diverter plate 19 can provide support for the preheating cylinder 7, and provide support for the internal water pump 16 through the preheating cylinder 7.

[0041] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A coal mine ventilation gas oxidation device, characterized in that: It comprises an outer shell (1), a base (2) is fixedly mounted on the bottom end of the outer shell (1), an inner shell (3) is fixedly mounted on the inner wall of the outer shell (1), and a first threaded air slot (4) and a second threaded air slot (5) are fixedly mounted on the inner wall of the inner shell (3); A preheating cylinder (7) is fixedly mounted on the inner surface of the threaded air groove (4), a groove (6) is provided inside the threaded air groove (4), and the groove (6) is connected to the inside of the preheating cylinder (7); Two guide tubes (8) and two heating rods (9) are provided inside the second threaded air slot (5); a heating cylinder (10) is fixedly installed on the inner wall of the second threaded air slot (5); and a coil (11) is fixedly installed on the inner wall of the heating cylinder (10); The outer surface of the second threaded air groove (5) is provided with a plurality of heat-conducting nets, and the heat-conducting nets are connected to the outer surface of the heating rod (9) and the guide tube (8).

2. A coal mine ventilation gas oxidation device according to claim 1, characterized in that: An air inlet pipe (12) is provided inside the base (2), a top shell (13) is fixedly mounted on the top end of the outer shell (1), and an exhaust port is provided on the inner side of the top shell (13).

3. A coal mine ventilation gas oxidation device according to claim 1, characterized in that: A drainage shell (14) is fixedly mounted on the inner top wall of the preheating cylinder (7), a mounting frame (15) is fixedly mounted on the inner wall of the drainage shell (14), a water pump (16) is fixedly mounted on the outer surface of the mounting frame (15), and an output end of the water pump (16) is fixedly mounted on the inner wall of the drainage shell (14).

4. A coal mine ventilation gas oxidation device according to claim 3, characterized in that: A water pipe (17) is fixedly mounted on the input end of the drainage shell (14); the outer surface of the water pipe (17) is fixedly mounted on the inner wall of the drainage shell (14); the water pipe (17) passes through the heating tube (10) and is located at the center of the coil (11).

5. A coal mine ventilation gas oxidation device according to claim 4, characterized in that: The top end of the water pipe 1 (17) is connected to the top end of the guide pipe (8), and the interior of the water pipe 1 (17) and the interior of the guide pipe (8) are interconnected.

6. A coal mine exhaust gas oxidation device according to claim 3, characterized in that: A second water pipe (18) is fixedly mounted on the bottom end of the guide pipe (8), the other end of the second water pipe (18) is fixedly mounted on the outer surface of the preheating cylinder (7), and the interior of the second water pipe (18) is connected to the space between the preheating cylinder (7) and the drainage shell (14).

7. A coal mine ventilation gas oxidation device according to claim 1, characterized in that: A diverter plate (19) is fixedly mounted on the bottom end of the preheating cylinder (7), and a plurality of vents (20) are provided in a circular array on the inner side of the diverter plate (19).

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