Tail gas treatment device for underground mine truck and use method

Abstract

The invention relates to an underground mine truck tail gas treatment device and a using method. A jet cylinder is sleeved outside a tail gas pipe, a throat part is formed in the middle of the jet cylinder, a gas outlet of the tail gas pipe is close to the throat part, an annular pipe is mounted on the tail gas pipe close to the pipe orifice end, and a plurality of primary nozzles are arranged on the side, facing the throat part, of the annular pipe; the left side of the lower portion of the water return pipe is connected with a reaction chamber, the jet flow cylinder penetrates through the reaction chamber, an ultraviolet light generation module is installed at the upper end of the jet flow cylinder in the reaction chamber, and a plurality of heat uniform distribution plates are arranged outside the jet flow cylinder and located in the reaction chamber. The tail gas treatment efficiency is remarkably improved, the treatment effect is optimized, multiple innovations are achieved technically, various pollutants are efficiently removed, energy utilization is optimized, an automatic adjusting system is arranged, the structure is compact and convenient to maintain, waste of water resources is reduced, and the environmental protection performance is enhanced; and a comprehensive and effective solution is provided for mine car tail gas treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of mine car exhaust gas treatment, and particularly relates to an underground mine car exhaust gas treatment device and a using method thereof. Background Art

[0002] The water immersion type exhaust gas filter is an essential configuration for mine cars. Currently, the water immersion type filtering equipment installed on mine cars has a very simple structure. It mainly consists of an integral water tank with an air inlet, an exhaust outlet, and a water filling port opened on the box body. The exhaust gas is connected to the air inlet through a pipeline and directly discharged from the air outlet after being filtered by the water inside the water tank. During this process, the exhaust gas quickly blows the water body in the water tank, resulting in too fast water loss, so it is necessary to frequently replenish the water source.

[0003] In the prior art, the water immersion type exhaust gas filter is often used for mine car exhaust gas treatment, as shown in the patent CN220705791U. This filter includes a main box body, a box cover, and a middle tray. An upper water chamber is formed at the bottom of the tray. Inside the tray, between two perforated plates, two B partitions are fixed. An A return pipe is provided at the bottom of the initial return water chamber, leading directly to the bottom of the main box body. A plurality of water vapor filtering cylinders are arranged side by side between the B partitions, and a sealing plate is fixed on the top of the tray. The gap between the sealing plate and the box cover is divided into a plurality of material filling chambers by a partition frame. The overall structural design of the present invention can greatly slow down the loss rate of the stored water in the filter and reduce the frequency of adding water inside the water immersion type filter during the use of the mine car.

[0004] The water immersion type exhaust gas treatment device filters the exhaust gas by submerging the exhaust pipe in water, but this design may lead to an increase in exhaust resistance, thereby affecting the operating power of the mine car.

[0005] In the prior art, CN219888136U discloses a mine car exhaust gas catalytic conversion device, including a protective shell, and a release mechanism for conveniently disassembling and assembling the catalytic conversion device is installed inside the protective shell. In the present invention, through the internal release mechanism, when using this mine car exhaust gas catalytic conversion device, through the openable protective cover, the catalytic converter originally integrated into the vehicle body is changed into a design with a protective shell and can be opened and taken out. When disassembling, it is not necessary to disassemble the entire main body. Instead, when a failure occurs, the protective cover is opened by turning the fixing bolt, and then the fixing screw rod is turned. The catalytic converter threadedly connected to the two flanges on both sides will rotate synchronously, and the catalytic converter can be easily removed by adjusting the flange position, which is convenient for replacing and repairing the catalytic converter, thereby improving the practicality of the catalytic converter.

[0006] The above technical solution realizes the treatment of mine car exhaust gas by means of catalyst catalysis. Since the catalyst used for exhaust gas treatment is usually a precious metal such as platinum, the cost is relatively high and it is not convenient to promote.

[0007] In the prior art, CN219888128U discloses a tail gas purification device for a mine car, including an exhaust pipe connection port. One side of the exhaust pipe connection port is fixedly welded with a purification extension pipe, and an installation block is arranged in the middle of the purification extension pipe. An adjustment mechanism is installed inside the installation block, which is convenient to use and can adjust the exhaust gas volume after the tail gas purification device is installed and can replace the internal purification system at the same time. In the present invention, an adjustment mechanism is built into the device. After installing the purification extension pipe, according to the actual displacement of the vehicle, the height of the purification filter screen can be adjusted by rotating the handle, and then the size of the exhaust port can be adjusted. This move aims to accelerate the emission of purified waste gas, avoid the exhaust speed being slowed down due to too small an exhaust port or too much air entering due to too large an exhaust port affecting the purification effect. By adjusting the filter screen height to the highest, the inner wall purification filter screen can be easily removed by rotation, realizing quick replacement, ensuring the purification efficiency, and thus facilitating the use and maintenance of the tail gas purification device.

[0008] The above technical solution uses a purification filter screen to filter the tail gas. However, if the above technical solution does not use a rare metal catalyst filter screen but only uses an ordinary filter screen, it can only filter particulate matter, and the particulate matter filter screen needs to be cleaned and replaced frequently. Summary of the Invention

[0009] In view of the above problems, the present invention provides a tail gas treatment device and a use method for an underground mine vehicle.

[0010] The specific technical solution of the present invention is: a tail gas treatment device for an underground mine vehicle, including a tail gas pipe, and a jet tube is sleeved outside the tail gas pipe. The left side of the jet tube is conical, and the right side is trumpet-shaped, thus forming a throat in the middle. The outlet of the tail gas pipe is close to the throat, and the right side of the throat is a diffusion part. An annular pipe is installed on the tail gas pipe near the pipe mouth end. A number of primary nozzles are arranged on the side of the annular pipe facing the throat. The right end of the jet tube is connected to a return water pipe through a connecting pipe. The connecting pipe is a tubular structure with the left side higher than the right side. The lower left side of the return water pipe is connected to a reaction chamber. The jet tube passes through the reaction chamber, and the diffusion part of the jet tube is located in the reaction chamber. An ultraviolet light generating module is installed at the upper end of the jet tube in the reaction chamber, and a number of heat distribution plates are arranged outside the jet tube. The heat distribution plates are located in the reaction chamber.

[0011] It also includes secondary nozzles, and a number of secondary nozzles are arranged above the heat distribution plates in the reaction chamber.

[0012] It also includes a connecting pipe. The upper right side of the reaction chamber is connected to a connecting pipe, and a cyclone chamber is connected to the connecting pipe. The cyclone chamber has a cylindrical structure at the upper part and a conical structure at the lower part. An exhaust pipe is connected in the cyclone chamber, and the lower port of the exhaust pipe in the cyclone chamber corresponds to the bottom outlet of the cylindrical structure of the cyclone chamber; the lower end of the cyclone chamber is connected to a drain pipe, and the drain pipe extends into the return water pipe.

[0013] The heat distribution plate is made of metal heat-conducting materials with acid resistance, such as stainless steel, alloy steel, and corrosion-resistant alloys.

[0014] Further, a one-way valve and / or a flow regulating valve are installed on the air pipe.

[0015] Further, it further includes a water supply pipe. The reaction chamber is connected to the water supply pipe. One end of the water supply pipe extends into the bottom of the reaction chamber, and the other end is divided into two pipes, which respectively pass through the jet cylinder and the reaction chamber and extend into them. The water supply pipe supplies liquid to the primary nozzle and the secondary nozzle.

[0016] Further, it further includes a high-pressure pump, and the high-pressure pump is installed on the water supply pipe.

[0017] Further, a filter screen is installed on the left side of the bottom of the reaction chamber. The filter screen divides the bottom of the reaction chamber into left and right two areas, and a nitric acid concentration sensor is installed in the left area of the filter screen.

[0018] Further, a carbon monoxide sensor and an ozone sensor are provided on the exhaust pipe.

[0019] Another technical object of the present invention is to disclose a usage method of the underground mining vehicle tail gas treatment device as described above, including the following steps: 1). The tail gas pipe discharges tail gas outwards. When the tail gas airflow blows out, a low pressure is formed at the throat of the tail gas pipe, and then the outside air enters through the air pipe.

[0020] 2). The high-pressure pump works to supply water to the annular pipe. The annular pipe sprays water towards the throat through the primary nozzle. Then, the outside air, water mist, and tail gas are mixed at the throat part of the jet cylinder, and then diffused through the diffusion part.

[0021] 3). The mixed gas enters the reaction chamber through the connecting pipe and the water return pipe. At this time, part of the water mist falls into the water at the bottom of the reaction chamber under the action of gravity, and part of the water mist gas mixture moves upward through the gaps between the heat distribution plates.

[0022] 4). Before that, when the water supply pipe supplies water to the annular pipe, it also supplies water to the secondary nozzle. The secondary nozzle sprays water mist, which moves downward under the action of gravity and the inertia of the water mist. Then, the water mist acts on the mixture between the heat distribution plates and the mixed gas rising from the heat distribution plates for sufficient mixing. Then, the nitrogen dioxide and unburned particulate matter in the mixed gas are reacted and combined. Under the action of gravity, part of the water mist adheres to the wall of the heat distribution plate and falls to the bottom of the reaction chamber. The ultraviolet light generating module irradiates the oxygen in the air in the mixed gas, and then ozone is generated. The ozone reacts with the unreacted nitric oxide and carbon monoxide, and then oxidizes them to form nitrogen dioxide and carbon dioxide. The nitrogen dioxide further reacts with the rising water mist.

[0023] 5). The gas enters the cyclone chamber through the connecting pipe. The combined water vapor adheres to the inner wall of the cyclone chamber under the action of the centrifugal force in the cyclone chamber, then falls under the action of gravity, and then is discharged downward through the drain pipe into the reaction chamber.

[0024] 6). The treated air is discharged outward through the exhaust pipe. The concentrations of carbon monoxide and ozone are judged through the carbon monoxide sensor and the ozone sensor, and then the combustion degree of the tail gas emission is judged. That is, when the concentration of carbon monoxide is high, it means that the tail gas combustion is incomplete, and ozone and carbon monoxide have not reacted completely. At this time, the opening degree of the flow regulating valve is increased to increase the intake air flow of the air pipe, and the power of the ultraviolet light generating module is increased to increase the amount of ozone, so as to react with the excess carbon monoxide. When the concentration of ozone is too high, it means that the output power of the ultraviolet light generating module and the intake air volume of the air pipe are too high. The opening degree of the flow regulating valve is reduced to reduce the air intake, and the power of the ultraviolet light generating module is reduced to reduce the amount of ozone generated, so as to avoid pollution caused by a large amount of ozone overflow.

[0025] The beneficial effects of the present invention are: Efficiently remove multiple pollutants: The device can simultaneously treat nitrogen dioxide (NO2), carbon monoxide (CO) and particulate matter in the tail gas. Through the mixing of water mist and gas, the action of the heat distribution plate and the ozone generated by ultraviolet light, the effective removal of multiple pollutants is achieved.

[0026] The design of the primary nozzle and the secondary nozzle enables the water mist to fully contact the tail gas, improving the reaction efficiency.

[0027] Optimize energy utilization: The high temperature of the tail gas is transferred to the heat distribution plate through the jet tube, increasing the temperature in the reaction chamber, thereby improving the chemical reaction rate and reducing energy consumption. The effective utilization of heat not only improves the reaction efficiency but also reduces the energy consumption required for additional heating.

[0028] Automatic adjustment system: Monitor the tail gas emission situation through the carbon monoxide sensor and the ozone sensor, and automatically adjust the intake air flow of the air pipe and the power of the ultraviolet light generating module to ensure the best treatment effect. The automatic control system can flexibly adjust parameters according to actual needs, thus eliminating the cumbersome manual intervention and significantly enhancing the reliability and stability of the system.

[0029] Compact structure and easy to maintain: The device adopts a modular design, the connection between components is tight, the overall structure is compact, it occupies a small space, and is convenient for installation and maintenance.

[0030] The design of the cyclone chamber enables the gas to be fully mixed during rotation, improving the treatment efficiency and reducing the complexity of the equipment at the same time.

[0031] Reduce water resource waste: Through the design of the sunken part, the sewer pipe can be made airtight even when moving on an inclined plane, avoiding the problem of gas directly overflowing from the sewer pipe due to airtight failure during inclined plane operation. The design of the filter screen and the upper and lower sewer pipes enables water to be recycled, further saving water resources.

[0032] Significantly improved environmental protection performance: Advanced exhaust gas treatment technologies such as wet desulfurization, selective catalytic reduction technology (SCR), and activated carbon adsorption are adopted to effectively reduce the emissions of harmful substances such as carbon monoxide, hydrogen sulfide, and nitrogen oxides in the exhaust gas, ensuring compliance with strict environmental protection emission standards. The ozone generation and control mechanism avoid a large amount of ozone overflow and reduce the risk of secondary pollution.

[0033] Improve operation efficiency: The jet tube and the overall design reduce the exhaust resistance compared with the existing technology of submerging the tail gas pipe in water, improve the operating power of the mine car, and ensure the normal operation of the vehicle. Through the careful optimization of the gas flow path and mixing method, the operation efficiency of the entire system has been significantly improved.

[0034] Strong adaptability: This device is applicable to the exhaust gas treatment of different types of mine cars, with strong adaptability and versatility. By adjusting the air flow rate and the power of the ultraviolet light generation module, it can flexibly cope with different exhaust gas emission situations. While the primary nozzle realizes the preliminary mixing of water mist and gas, the sprayed water mist directly acts on the throat of the jet tube, avoiding the adhesion of particulate matter to the throat of the jet tube and causing blockage. Description of the Drawings

[0035] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the jet tube of the present invention; Figure 3 is a schematic diagram of the tail gas pipe of the present invention viewed from the throat direction towards the air pipe direction; Figure 4 is a top view partial view of the present invention, in which components such as the cyclone chamber are not drawn.

[0036] In the figure: 1 - tail gas pipe, 2 - jet tube, 201 - throat, 202 - diffusion part, 203 - conducting part, 3 - air pipe, 4 - one-way valve, 5 - flow regulating valve, 6 - annular pipe, 7 - high-pressure pump, 8 - connecting pipe, 9 - return pipe, 901 - sunken part, 10 - reaction chamber, 11 - ultraviolet light generation module, 12 - upper water pipe, 1201 - primary nozzle, 1202 - secondary nozzle, 13 - heat distribution plate, 14 - filter screen, 15 - nitric acid concentration sensor, 16 - connecting pipe, 17 - cyclone chamber, 18 - exhaust pipe, 1801 - carbon monoxide sensor, 1802 - ozone sensor, 19 - lower water pipe. Detailed Embodiment

[0037] In order to make the technical problems and technical solutions solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0039] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0040] As Figures 1 to 4 shown, a tail gas treatment device for an underground mining vehicle includes a tail gas pipe 1 of the mining vehicle. A jet tube 2 is sleeved outside the tail gas pipe 1. The left side of the jet tube 2 is conical, and the right side is trumpet-shaped, thus forming a throat 201 in the middle. The tail gas pipe 1 penetrates into the conical cavity on the left side of the jet tube 2, and the air outlet of the tail gas pipe 1 is close to the throat 201. The trumpet-shaped cavity on the right side of the throat 201 is a diffusion part 202. An annular pipe 6 is installed near the pipe orifice end of the tail gas pipe 1. A plurality of primary nozzles 1201 are arranged on the side of the annular pipe 6 facing the throat 201. The right end of the jet tube 2 is communicated with a water return pipe 9 through a connecting pipe 8. The connecting pipe 8 is a tubular structure with a higher left side than the right side. A sinking part 901 is provided at the lower part of the water return pipe 9.

[0041] A one-way valve 4 and / or a flow regulating valve 5 are installed on the air pipe 3.

[0042] The left side at the lower part of the water return pipe 9 is connected to a reaction chamber 10. The jet tube 2 passes through the reaction chamber 10, that is, the diffusion part 202 of the jet tube 2 is located in the reaction chamber 10. An ultraviolet light generating module 11 is installed at the upper end of the jet tube 2 in the reaction chamber 10. A plurality of heat distribution plates 13 are arranged outside the jet tube 2, and the heat distribution plates 13 are located in the reaction chamber 10.

[0043] It also includes a secondary spray head 1202. A number of secondary spray heads 1202 are arranged above the heat distribution plate 13 inside the reaction chamber 10. The secondary spray head 1202 is located below the ultraviolet light generation module 11, that is, a secondary spray head 1202 is also arranged between the heat distribution plate 13 and the ultraviolet light generation module 11.

[0044] The reaction chamber 10 is connected to a water supply pipe 12. A high-pressure pump 7 is installed on the water supply pipe 12. One end of the water supply pipe 12 extends into the bottom of the reaction chamber 10, and the other end is divided into two pipes, which respectively pass through the jet cylinder 2 and the reaction chamber 10 and extend into it. The water supply pipe 12 supplies liquid to the primary spray head 1201 and the secondary spray head 1202, that is, there are two water supply pipes 12. One is connected to the annular pipe 6, and the other extends into the reaction chamber 10 and is installed with a secondary spray head 1202. The spray orifice of the secondary spray head 1202 faces the heat distribution plate 13.

[0045] Furthermore, a filter screen 14 is installed on the left side of the bottom of the reaction chamber 10. The filter screen 14 divides the bottom of the reaction chamber 10 into left and right two regions. A nitric acid concentration sensor 15 is installed in the left region of the filter screen 14. The water inlet end of the lower end of the water supply pipe 12 is located in the left region of the filter screen 14.

[0046] It also includes a connecting pipe 16. The right side of the upper end of the reaction chamber 10 is connected to the connecting pipe 16. A cyclone chamber 17 is connected to the connecting pipe 16. The cyclone chamber 17 has a cylindrical structure in the upper part and a conical structure in the lower part. An exhaust pipe 18 is connected in the cyclone chamber 17. The lower port of the exhaust pipe 18 located in the cyclone chamber 17 corresponds to the bottom outlet position of the cylindrical structure of the cyclone chamber 17. The lower port of the exhaust pipe 18 located in the cyclone chamber 17 is lower than the pipe orifice of the connecting pipe 16 and is close to the bottom outlet of the cylindrical structure of the cyclone chamber 17.

[0047] A carbon monoxide sensor 1801 and an ozone sensor 1802 are arranged on the exhaust pipe 18.

[0048] The lower end of the cyclone chamber 17 is connected to a water discharge pipe 19. The water discharge pipe 19 extends into the water return pipe 9, specifically extends into the middle of the water return pipe 9 and the lower end of the water discharge pipe 19 falls into the sinking part 901.

[0049] The using method of the above-mentioned underground mine vehicle tail gas treatment device includes the following steps: 1). The tail gas pipe 1 of the mine vehicle discharges tail gas. When the tail gas airflow blows out, a low pressure is formed at the throat 201 of the tail gas pipe 1, and then the outside air enters through the air pipe 3.

[0050] 2). Meanwhile, the high-pressure pump 7 works to supply water to the annular pipe 6. The annular pipe 6 sprays water towards the throat 201 through the primary nozzle 1201. Then, the outside air, water mist, and tail gas are mixed at the throat 201 of the jet tube 2, and then diffused through the diffusion part 202. At this time, a preliminary reaction occurs between the water and nitrogen dioxide in the tail gas, and a preliminary combination of the particulate matter in the tail gas is carried out.

[0051] 3). The mixed gas passes through the connecting pipe 8 and enters the reaction chamber 10 through the return pipe 9. At this time, a part of the water mist falls into the water at the bottom of the reaction chamber 10 under the action of gravity. An appropriate amount of water is pre-filled in the reaction chamber 10. A part of the water mist gas mixture moves upward through the gaps between the heat distribution plates 13.

[0052] 4). Before this, while the water supply pipe 12 supplies water to the annular pipe 6, it also supplies water to the secondary nozzle 1202. The water mist sprayed by the secondary nozzle 1202 moves downward under the action of gravity and the inertia of the water mist. Then, the water mist acts on and is fully mixed with the mixed gas rising from between the heat distribution plates 13, and then reacts and combines with the nitrogen dioxide and incompletely combusted particulate matter in the mixed gas. Under the action of gravity, part of the water mist adheres to the wall of the heat distribution plate 13 and falls to the bottom of the reaction chamber 10. Since the temperature of the tail gas is usually 200 - 600 degrees, the tail gas will heat the jet tube 2 when passing through the jet tube 2. The heat is transferred from the jet tube 2 to the heat distribution plate 13, and then the heat is dissipated through the heat distribution plate 13, thereby increasing the reaction temperature in the reaction chamber 10 and further increasing the reaction efficiency. When the mixed gas passes through the upper part of the reaction chamber 10, the ultraviolet light generation module 11 irradiates the oxygen in the air in the mixed gas, thereby generating ozone. The ozone reacts with the unreacted nitric oxide and carbon monoxide, thereby oxidizing them to form nitrogen dioxide and carbon dioxide. The nitrogen dioxide further reacts with the rising water mist.

[0053] 5). The gas enters the cyclone chamber 17 through the connecting pipe 16. Among them, the connecting pipe 16 is connected to the tangential area at the upper part of the cyclone chamber 17. Then, the gas rotates in the cyclone chamber 17. At this time, under the action of the shape of the cyclone chamber 17, since the air outlet position is located in the middle of the cyclone chamber 17, the gas makes a horizontal rotational movement in the cyclone chamber and at the same time generates a tendency to move downward and then upward in the middle, thereby forming an inner-rotating and outer-rotating air flow structure. This structure enables the gas to be fully mixed in the cyclone chamber 17, enabling the ozone, carbon monoxide, and nitric oxide to fully react and fully combine with the water vapor. The combined water vapor adheres to the inner wall of the cyclone chamber 17 under the action of the centrifugal force of the cyclone chamber 17, then falls under the action of gravity, and then is discharged downward through the drain pipe 19 into the reaction chamber 10.

[0054] 6). The processed air is discharged outward through the exhaust pipe 18. The concentrations of carbon monoxide and ozone are judged by the carbon monoxide sensor 1801 and the ozone sensor 1802, and then the combustion degree of the tail gas emission is judged. That is, when the concentration of carbon monoxide is high, it means that the tail gas combustion is incomplete and the ozone and carbon monoxide do not react completely. At this time, the opening of the flow regulating valve 5 is increased to increase the intake flow of the air pipe 3, and the power of the ultraviolet light generating module 11 is increased to increase the amount of ozone, so as to react with the excess carbon monoxide. When the concentration of ozone is too high, it means that the output power of the ultraviolet light generating module 11 and the intake air volume of the air pipe 3 are too high. The opening of the flow regulating valve 5 is reduced to reduce the air intake, and the power of the ultraviolet light generating module 11 is reduced to reduce the amount of ozone generated, avoiding pollution caused by a large amount of ozone overflow. When the mine car moves on the inclined plane, water can still be stored in the sinking part, preventing the mixed gas passing through the return water pipe from being directly discharged outward through the lower water pipe when the mine car moves on the inclined plane.

[0055] The mine car tail gas treatment device and method proposed by the present invention, through a series of innovative designs and optimizations, significantly improve the efficiency and effect of tail gas treatment. It not only achieves multiple innovations technically, but also has significant economic and environmental benefits in practical applications. By efficiently removing various pollutants, optimizing energy utilization, automatically regulating the system, being compact in structure and easy to maintain, reducing water resource waste, enhancing environmental protection performance, improving operation efficiency, and enhancing adaptability, it provides a comprehensive and effective solution for mine car tail gas treatment.

[0056] The present invention has been described in detail through specific and preferred embodiments above. However, those skilled in the art should understand that the protection scope of the present invention is not limited to the above embodiments. Any modification or equivalent replacement that conforms to the spirit and principle of the present invention should be regarded as being included in the protection scope of the present invention.

Claims

1. An underground mining vehicle exhaust gas treatment device, including an exhaust pipe (1), characterized in that, The exhaust pipe (1) is externally sleeved with a jet tube (2). The left side of the jet tube (2) is conical, and the right side is flared, thereby forming a throat (201) in the middle. The air outlet of the exhaust pipe (1) is close to the throat (201). The right side of the throat (201) is a diffusion part (202). An annular pipe (6) is installed on the exhaust pipe (1) near the pipe orifice end. A number of primary nozzles (1201) are arranged on the side of the annular pipe (6) facing the throat (201). The right end of the jet tube (2) is communicated with a water return pipe (9) through a connecting pipe (8). The connecting pipe (8) is a tubular structure with a higher left side than the right side. The lower left side of the water return pipe (9) is connected with a reaction chamber (10). The jet tube (2) passes through the reaction chamber (10). The diffusion part (202) of the jet tube (2) is located in the reaction chamber (10). An ultraviolet light generating module (11) is installed at the upper end of the jet tube (2) in the reaction chamber (10). A number of heat distribution plates (13) are arranged outside the jet tube (2). The heat distribution plates (13) are located in the reaction chamber (10); It further includes secondary nozzles (1202). A number of secondary nozzles (1202) are arranged above the heat distribution plates (13) in the reaction chamber (10); It further includes a connecting pipe (16). The upper right side of the reaction chamber (10) is connected with a connecting pipe (16). A cyclone chamber (17) is connected to the connecting pipe (16). The cyclone chamber (17) has a cylindrical tube structure in the upper part and a conical tube structure in the lower part. An exhaust pipe (18) is connected in the cyclone chamber (17). The lower port of the exhaust pipe (18) located in the cyclone chamber (17) corresponds to the bottom outlet position of the tube structure of the cyclone chamber (17); A water drain pipe (19) is connected to the lower end of the cyclone chamber (17). The water drain pipe (19) extends into the water return pipe (9).

2. The exhaust gas treatment device for an underground mining vehicle according to claim 1, wherein A one-way valve (4) and / or a flow regulating valve (5) is installed on the air pipe (3).

3. The exhaust gas treatment device for underground mining vehicles according to claim 1, characterized in that, It further includes a water supply pipe (12). The reaction chamber (10) is communicated with a water supply pipe (12). One end of the water supply pipe (12) extends into the bottom of the reaction chamber (10), and the other end is divided into two pipes, which respectively pass through the jet tube (2) and the reaction chamber (10) and extend into them. The water supply pipe (12) supplies liquid to the primary nozzles (1201) and the secondary nozzles (1202).

4. An underground mining vehicle exhaust gas treatment device according to claim 3, characterized in that, It further includes a high-pressure pump (7). A high-pressure pump (7) is installed on the water supply pipe (12).

5. An underground mining vehicle exhaust gas treatment device according to claim 3, characterized in that, A filter screen (14) is installed on the left side of the bottom of the reaction chamber (10). The filter screen (14) divides the bottom of the reaction chamber (10) into left and right two regions. A nitric acid concentration sensor (15) is installed in the left region of the filter screen (14).

6. The exhaust gas treatment device for an underground mining vehicle according to claim 3, wherein, A carbon monoxide sensor (1801) and an ozone sensor (1802) are arranged on the exhaust pipe (18).

7. A method for using an exhaust gas treatment device for an underground mining vehicle, characterized in that, It includes the following steps: 1). The exhaust pipe (1) discharges exhaust gas outward. When the exhaust gas flow blows out, a low pressure is formed at the throat (201) of the exhaust pipe (1), thereby causing the outside air to enter through the air pipe (3); 2). The high-pressure pump (7) operates to supply water to the annular pipe (6). The annular pipe (6) sprays water towards the throat (201) through the primary nozzle (1201). Then, the outside air, water mist, and exhaust gas are mixed at the throat (201) of the jet tube (2), and then diffused through the diffuser (202). 3). The mixed gas passes through the connecting pipe (8) and the return pipe (9) and enters the reaction chamber (10). At this time, a part of the water mist falls into the water at the bottom of the reaction chamber (10) under the action of gravity, and a part of the water mist-gas mixture moves upward through the gaps between the heat distribution plates (13). 4). Before that, while the water supply pipe (12) supplies water to the annular pipe (6), it also supplies water to the secondary nozzle (1202). The water mist sprayed by the secondary nozzle (1202) moves downward under the action of gravity and the inertia of the water mist. Then, the water mist acts on the mixture gas rising between and from the heat distribution plates (13) and is fully mixed. Then, the nitrogen dioxide and unburned particulate matter in the mixture gas are reacted and combined. Under the action of gravity, part of the water mist adheres to the wall of the heat distribution plate (13) and falls to the bottom of the reaction chamber (10). The ultraviolet light generation module (11) irradiates the oxygen in the air in the mixture gas, and then ozone is generated. The ozone reacts with the unreacted nitric oxide and carbon monoxide, and then oxidizes them to form nitrogen dioxide and carbon dioxide. The nitrogen dioxide further reacts with the rising water mist. 5). The gas enters the cyclone chamber (17) through the connecting pipe (16). The combined water vapor adheres to the inner wall of the cyclone chamber (17) under the action of the centrifugal force of the cyclone chamber (17), and then falls under the action of gravity, and then is discharged downward through the down pipe (19) into the reaction chamber (10). 6). The treated air is discharged outward through the exhaust pipe (18). The carbon monoxide sensor (1801) and the ozone sensor (1802) are used to judge the concentrations of carbon monoxide and ozone, and then judge the combustion degree of the exhaust gas emissions. That is, when the concentration of carbon monoxide is high, it means that the exhaust gas is not completely burned, and ozone and carbon monoxide are not completely reacted. At this time, the opening degree of the flow regulating valve (5) is increased, the intake flow of the air pipe (3) is increased, and the power of the ultraviolet light generation module (11) is increased, so as to increase the amount of ozone and react with the excess carbon monoxide. When the concentration of ozone is too high, it means that the output power of the ultraviolet light generation module (11) and the intake air volume of the air pipe (3) are too high. The opening degree of the flow regulating valve (5) is reduced to reduce the air intake, and the power of the ultraviolet light generation module (11) is reduced, so as to reduce the amount of ozone generated and avoid pollution caused by a large amount of ozone overflow.

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