Coal mine underground flame-proof diesel engine front end combustion-supporting and emission-reducing device and method

Abstract

The invention belongs to but is not limited to the technical field of tail gas emission reduction of explosion-proof diesel engines, and discloses a coal mine underground explosion-proof diesel engine front-end combustion-supporting emission reduction device and method, which comprises an explosion-proof box body, a water electrolysis reactor, an inlet and outlet flange piece, a water tank, a control unit, a connecting piece, a fastening piece and a PWM (Pulse Width Modulation) control circuit, the explosion-proof box body has flame-retardant and explosion-proof effects, and the explosion-proof shell, the upper cover and the front cover of the explosion-proof box body are connected in a threaded locking manner, so that the sealing performance in a closed state is ensured. The water tank is connected with the tank body upper cover, the inlet and outlet flange piece is arranged on the tank body upper cover, filter cotton is arranged in the inlet and outlet flange piece, the inlet and outlet flange piece has water blocking, filtering and gas-water separating capacities, and the inlet and outlet flange piece can be opened and closed to achieve gas discharge and water input. The control unit is arranged on the inner side of the explosion-proof box body and used for controlling the operation process.

Description

Technical Field

[0001] The present invention belongs to but is not limited to the technical field of flameproof diesel engine exhaust emission reduction, and in particular relates to a front-end combustion-supporting emission reduction device and method for flameproof diesel engines in underground coal mines. Background Art

[0002] In the traditional industry of coal mining, with the acceleration of industrialization, the performance requirements for underground machinery are constantly increasing. As the core power source of construction machinery, diesel engines play a key role in underground coal mine operations. However, the particularity of the underground environment, such as high gas, high dust and high temperature, poses more severe challenges to the performance and safety of diesel engines.

[0003] Limitations of existing technologies: 1. Explosion-proof performance requirements: The air in coal mines often contains flammable and explosive gas, and the diesel engines used are required to have strict explosion-proof performance to ensure safe operation. 2. Exhaust emission issues: The exhaust gas generated during the operation of the diesel engine contains pollutants such as nitrogen oxides (NOx), carbon monoxide (CO), and hydrocarbons (HC), which pose a threat to the health of underground workers and the environment. 3. Heat dissipation issues: The closed underground environment places higher demands on the heat dissipation performance of the diesel engine. The heat dissipation performance of the existing explosion-proof box is insufficient, which affects the stable operation of the equipment. 4. Equipment compactness: The underground operating space is limited, and there are strict restrictions on the volume and weight of the diesel engine and its supporting equipment. 5. Limitations of exhaust after-treatment technology: Traditional exhaust after-treatment technologies such as the SCR system require additional high-pressure pumps and electronic control systems, which increase the complexity and cost of the system. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a front-end combustion-supporting and emission-reducing device and method for a flameproof diesel engine in an underground coal mine.

[0005] The present invention is implemented as follows: a front-end combustion-supporting and emission-reducing device for flameproof diesel engines in underground coal mines comprises a flameproof housing, a water electrolysis reactor, inlet and outlet flanges, a water tank, a control unit, connectors and fasteners, and a PWM control circuit.

[0006] The flameproof box is made of high-strength material. The flameproof shell withstands the explosion pressure inside, and the structural design with increased wall thickness ensures that the explosion will not spread directly to the external environment, and prevents explosive gas or dust from entering the shell; the upper cover is provided with inlet and outlet flanges for connecting external gas pipelines. It is the detachable part on the top of the flameproof box and is connected to the flameproof shell by thread locking to ensure good sealing performance in the closed state; the front cover is located at the detachable part at the front of the flameproof shell, and is connected to the flameproof shell by thread locking. It is used to install, maintain or inspect electrical components inside the flameproof box.

[0007] The water electrolysis reactor consists of an anode: made of materials with good electrical conductivity and corrosion resistance. During the electrolysis process, an oxidation reaction occurs at the anode, and water molecules lose electrons to produce oxygen. A cathode: made of materials with good electrical conductivity and corrosion resistance. A reduction reaction occurs at the cathode, and water molecules gain electrons to produce hydrogen. An electrolyte: an alkaline solution. The role of the electrolyte is to conduct ions between the electrodes so that the electrolysis reaction can proceed smoothly. Electrical connection part: including the connecting wires between the electrodes and the external power supply, to ensure that the current can be stably input into the water electrolysis reactor.

[0008] The water tank has good sealing performance and is used to store electrolyte, ensure the supply of electrolyte, and ensure the continuous electrolysis reaction. The water tank is equipped with a liquid level sensor to monitor the electrolyte level in real time to ensure that the electrolyte is within a safe range.

[0009] The PWM control circuit provides a stable, non-fluctuating DC power supply to the water electrolysis reactor, thereby realizing precise control of the power supply to the water electrolysis reactor.

[0010] Furthermore, filter cotton is installed inside the inlet and outlet flanges, which has water blocking and filtering functions; the switch can be closed to achieve control of gas discharge and water input.

[0011] Furthermore, the gas transmission pipeline is made of high-pressure and high-temperature resistant materials to ensure reliability in the underground coal mine environment; the pipeline connection adopts quick connectors to facilitate installation and maintenance.

[0012] Furthermore, the control unit integrates intelligent sensors and control logic to achieve precise control of water electrolysis rate and gas delivery; the control unit has a self-diagnosis function, which can monitor the equipment status in real time and automatically shut down under abnormal circumstances.

[0013] Furthermore, connectors and fasteners: All connectors and fasteners are made of high-strength materials to ensure reliability in the harsh environment of underground coal mines.

[0014] Furthermore, the flameproof box is made of Q355B material to enhance the structural strength; the thickness of the flameproof box is 10mm.

[0015] Another object of the present invention is to provide a combustion-supporting and emission-reducing method for a front-end combustion-supporting and emission-reducing device for an underground flameproof diesel engine in a coal mine, comprising:

[0016] 1. Water electrolysis produces gas: The water electrolysis reactor uses a DC power supply to decompose the electrolyte into hydrogen and oxygen;

[0017] 2. Gas collection and transportation: The generated hydrogen and oxygen are safely collected in a water tank and transported to the intake duct of the diesel engine through an explosion-proof piping system to mix with the fuel in the combustion chamber;

[0018] 3. Intelligent control: The control unit automatically adjusts the rate of water electrolysis and the amount of gas delivered according to the operating parameters of the diesel engine, such as temperature and pressure, to ensure the best combustion effect.

[0019] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0020] First, the novel flameproof diesel engine front-end combustion-supporting and emission-reducing device proposed by the present invention effectively solves the problems of the prior art through the following innovative technical solutions:

[0021] 1. Electrolytic hydrogen and oxygen combustion-supporting technology: Utilize the surplus current of the vehicle battery to generate hydrogen and oxygen through the electrolyte, which directly participate in engine combustion and improve combustion efficiency.

[0022] 2. Intelligent control system: realize on-demand production and precise control of hydrogen and oxygen to ensure the stability and safety of the combustion process.

[0023] 3. Explosion-proof safety design: A special explosion-proof box design is used to ensure that the explosion will not spread directly to the external environment and prevent explosive gas or dust from entering the shell.

[0024] 4. Multiple safety protection functions: including overheat protection, overpressure protection, leakage detection, etc., to ensure the safe and reliable operation of the equipment under various working conditions.

[0025] 5. Significant energy-saving and emission-reduction effects: The participation of hydrogen and oxygen enables the fuel to burn fully, significantly reducing the emission of harmful substances in the exhaust gas.

[0026] 6. Strong adaptability: The device has compact design and stable functions, and is suitable for industrial fields with high requirements for safety and stability.

[0027] The innovative foundation of the new flameproof diesel engine front-end combustion-supporting and emission-reduction device is based on an in-depth analysis of existing technologies and a deep understanding of the underground working environment of coal mines, providing an innovative solution for energy conservation, emission reduction and safe production in the coal mining industry. With the maturity of technology and market recognition, the present invention is expected to play an important role in the future coal mining and engineering machinery fields. The technical solution of the present invention is expected to bring significant changes in the field of underground engineering machinery in coal mines, improve operating efficiency, reduce operating costs, improve the underground working environment, protect the health of operators, and promote the green transformation and sustainable development of the coal industry.

[0028] Second, the technical solution of the present invention mainly solves the following problems in the prior art:

[0029] 1. Security issues:

[0030] Traditional diesel engines have safety risks of flammable gas when used in coal mines. The present invention significantly improves the explosion-proof safety of the equipment through the special structural design and materials of the explosion-proof box.

[0031] 2. Exhaust emission issues:

[0032] The exhaust gas generated during the combustion of diesel engines contains a variety of harmful substances, which threaten the environment and human health. The present invention optimizes the combustion process and reduces the emission of harmful substances through hydrogen-oxygen combustion-supporting technology.

[0033] 3. Combustion efficiency issues:

[0034] Traditional diesel engines have incomplete combustion, resulting in energy waste. The present invention uses an intelligent control system to supply hydrogen and oxygen on demand, thereby improving combustion efficiency and reducing fuel consumption.

[0035] 4. Equipment compactness problem:

[0036] The underground space is limited, and there are strict requirements on the volume of the equipment. The structure of the invention is compact, adapts to the underground space limitation, and is easy to install and maintain.

[0037] 5. Operational complexity issues:

[0038] The traditional electrolytic hydrogen and oxygen device is complicated to operate and needs to deal with the moisture in the gas and ensure safety. The present invention integrates the gas-water separation, fire retardant and explosion-proof functions into one, simplifying the operation process.

[0039] 6. Environmental protection and energy saving issues:

[0040] Conventional technologies have failed to effectively achieve environmental protection and energy conservation goals. The present invention helps reduce energy consumption and waste emissions by optimizing the electrolysis process and improving gas purity.

[0041] 7. Limitations of explosion-proof technology:

[0042] The existing explosion-proof technology increases the complexity and cost of the equipment. The explosion-proof box structure adopted by the present invention not only improves the safety but also maintains the simplicity of the design.

[0043] 8. Gas purity problem:

[0044] The gas generated during the electrolysis of water carries moisture, which affects the purity of the gas. The inlet and outlet flanges of the present invention have a gas-water separation function, which effectively removes moisture from the gas and ensures the dryness of the gas.

[0045] By solving the above problems, the technical solution of the present invention not only improves the safety and combustion efficiency of diesel engines in coal mines, but also reduces environmental pollution, achieves the goal of energy conservation and emission reduction, simplifies the operating process, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural diagram of a front-end combustion-supporting and emission-reducing device for a flameproof diesel engine in an underground coal mine provided by an embodiment of the present invention;

[0047] Figure 2 It is a top view of the structure of the front end combustion-supporting and emission-reducing device for a flameproof diesel engine in an underground coal mine provided by an embodiment of the present invention;

[0048] Figure 3 It is a schematic diagram of a flameproof upper cover and a water tank provided in an embodiment of the present invention;

[0049] Figure 4 is a schematic diagram of a flameproof enclosure provided by an embodiment of the present invention;

[0050] Figure 5 is a side view of a flameproof enclosure provided by an embodiment of the present invention;

[0051] Figure 6 is a schematic diagram of the inlet and outlet flanges provided by an embodiment of the present invention;

[0052] Figure 7 is a top view of the inlet and outlet flanges provided by an embodiment of the present invention;

[0053] In the figure: 10, flameproof box; 11, flameproof shell; 12, upper cover; 13, front cover; 20, water electrolysis reactor; 30, inlet and outlet flanges; 40, water tank; 50, PWM control circuit. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the 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.

[0055] The working principle of the front-end combustion-supporting and emission-reducing device for flameproof diesel engines in underground coal mines provided by the present invention is divided into the following four parts:

[0056] like Figure 1 , 2 As shown, the protection function of the flameproof box 10: the flameproof box 10 is made of high-strength explosion-proof material and mainly plays the role of protecting internal components. The increase in the thickness of the box wall ensures that when an explosion occurs, the shock wave will not be transmitted to the outside, preventing the explosion gas or dust from entering the box. The upper cover 12 and the front cover 13 are firmly connected to the shell 11 through a threaded locking design, which further enhances the airtightness and explosion-proof performance of the box, ensuring the safe operation of the internal components in the complex environment of the coal mine.

[0057] Gas generation mechanism of water electrolysis reactor 20: Water electrolysis reactor 20 is the core component of the device, which generates hydrogen and oxygen by electrolyzing water. The anode and cathode are made of corrosion-resistant conductive materials. Under the action of a DC power supply, the water in the electrolyte solution is decomposed, the anode generates oxygen, and the cathode generates hydrogen. After proper treatment, these hydrogen and oxygen mixed gases enter the intake system of the diesel engine and participate in combustion, thereby achieving the effect of improving combustion efficiency and reducing emissions.

[0058] like Figure 3 3. Liquid level control and liquid supply guarantee of water tank 40: Water tank 40 is responsible for storing electrolyte solution to ensure that the water electrolysis reactor 20 has sufficient reactants. The water tank 40 is designed to have sealing performance and is equipped with a liquid level sensor to monitor the liquid level of the electrolyte in real time. Through the feedback of the liquid level sensor, the system can automatically adjust the supply of electrolyte to ensure the continuous reaction and avoid reaction interruption or equipment failure caused by insufficient electrolyte.

[0059] Precise control of PWM control circuit 50: PWM control circuit 50 precisely controls the current intensity of water electrolysis reactor 20 by adjusting the duty cycle of the DC power supply. The adjustment of the duty cycle directly affects the rate of the electrolysis reaction, thereby controlling the amount of hydrogen generated. Under different working conditions, the control circuit can automatically adjust the hydrogen supply according to the load of the diesel engine, ensuring that the system is always in a safe, stable and efficient operating state, achieving the diesel engine's combustion-supporting and emission reduction goals.

[0060] Protection function of the flameproof box 10: The flameproof box 10 is made of high-strength explosion-proof materials, which can effectively protect the internal electronic components and equipment, especially in high-risk environments such as coal mines. The thickness of the box wall is specially designed to withstand the shock wave generated by the explosion and prevent the shock wave from causing harm to the external environment. In addition, the box is designed with a threaded upper cover 12 and a front cover 13 to ensure that the box is completely isolated from the outside world, further improving the airtightness and explosion-proof performance, preventing any explosive gas or dust from entering the box, and ensuring the stable operation of the equipment in complex environments.

[0061] Gas generation mechanism of water electrolysis reactor 20: The water electrolysis reactor 20 is the core part of the device, which generates hydrogen and oxygen by electrolyzing water. Under the action of direct current, the water molecules in the electrolyte solution are decomposed, oxygen is produced at the anode, and hydrogen is produced at the cathode. During the electrolysis process, corrosion-resistant conductive materials are used as electrodes to ensure the long life and high efficiency of the equipment. These generated hydrogen and oxygen mixed gases are treated and introduced into the intake system of the diesel engine, which improves the combustion efficiency by supporting combustion, while reducing exhaust emissions, achieving environmental protection and energy saving effects.

[0062] Liquid level control and liquid supply guarantee of water tank 40: Water tank 40 is responsible for storing electrolyte solution to ensure that the water electrolysis reactor 20 continues to supply sufficient reactants. The sealing design of the water tank ensures that the electrolyte solution will not leak, and the built-in liquid level sensor can monitor the liquid level in the water tank in real time. When the liquid level is too low, the system automatically adjusts the supply of electrolyte through the feedback signal of the sensor to ensure that the reactor continues to work. This design not only avoids the shutdown problem caused by insufficient electrolyte, but also ensures the long-term stable operation of the system.

[0063] Precise control of PWM control circuit 50: PWM control circuit 50 precisely controls the current intensity in the electrolysis reaction by adjusting the duty cycle of the DC power supply. The duty cycle adjustment directly affects the generation rate of hydrogen and oxygen in the water electrolysis reactor 20. The system can automatically adjust the current size according to the workload of the diesel engine, optimize the hydrogen supply, and ensure that the diesel engine always maintains an efficient and stable combustion state under different working conditions. The precise control of the PWM control circuit provides the core technical guarantee for achieving combustion efficiency and emission reduction of the diesel engine.

[0064] like Figure 4 , 5 As shown, the flameproof box 10 is the core protective structure of the entire device. It is made of high-strength materials and has explosion-proof performance. In the coal mine, the flameproof box 10 needs to withstand the internal explosion pressure, so the flameproof shell 11 resists the explosion impact by increasing the wall thickness and using high-strength materials to ensure that the explosion will not spread to the external environment. The upper cover 12 and the front cover 13 are both designed with threaded locking to ensure good sealing in the closed state, preventing explosive gas or dust from entering the flameproof box 10, thereby protecting the internal electrical components from the influence of the external environment.

[0065] The water electrolysis reactor 20 is the core reaction component of the device, responsible for electrolyzing water into hydrogen and oxygen. The anode and cathode in the reactor are made of corrosion-resistant conductive materials. After power is turned on, an oxidation reaction occurs at the anode, and water molecules lose electrons to generate oxygen; a reduction reaction occurs at the cathode, and water molecules gain electrons to generate hydrogen. The electrolyte is an alkaline solution that can conduct ions between the anode and the cathode to ensure the continuation of the electrolysis reaction. The generated hydrogen is introduced into the combustion system of the diesel engine to improve combustion efficiency and reduce emissions.

[0066] The water tank 40 is used to store the electrolyte and monitor the electrolyte level in real time through the liquid level sensor. When the liquid level is lower than the set range, the sensor will send an alarm signal to the control unit to remind you to add electrolyte. The sealing design of the water tank 40 ensures that the electrolyte will not leak during transportation and operation, while maintaining the purity of the electrolyte, preventing contamination, and ensuring the continuity and stability of the electrolytic reaction.

[0067] The PWM control circuit 50 is responsible for providing a stable DC power supply to the water electrolysis reactor 20. By adjusting the duty cycle, the PWM control circuit 50 can accurately control the current intensity of the electrolysis reaction, thereby controlling the output of hydrogen. This can not only improve the electrolysis efficiency, but also prevent excessive heat from being generated during the electrolysis process, ensuring the safety and stability of the entire system. The PWM control circuit 50 can also dynamically adjust the power output of the electrolysis reaction according to the load changes of the diesel engine to achieve optimal fuel utilization and emission control.

[0068] Through these mutually coordinated components, the present invention realizes the efficient and safe combustion-supporting and emission-reducing functions in coal mines, and provides a reliable technical solution for improving the combustion efficiency of diesel engines and reducing harmful gas emissions.

[0069] The coal mine underground flameproof diesel engine front-end combustion-supporting and emission-reducing device of the present invention adopts a flameproof structure and an intelligent control unit to achieve multiple functions of flameproofing, water blocking and gas emission. The device is composed of an inlet and outlet flange 30, a flameproof housing 11, an upper cover 12, a front cover 13 and a control unit, and has a compact structure and powerful functions.

[0070] First, the device is made of high-strength materials. The box body consists of a flameproof shell 11 and a detachable upper cover 12 and a front cover 13, which are connected by threaded locking to ensure sealing in the closed state. The box body is made of a 10mm thick material with flame retardant and flameproof effect, which has the function of bearing the pressure generated by the internal explosion and preventing the flame from spreading outward, further enhancing the overall safety.

[0071] like Figure 6 , 7 As shown, secondly, the inlet and outlet flanges 30 are arranged on the upper cover 12 of the box body, and filter cotton and fire-blocking elements are installed inside, which have good gas-water separation and fire-blocking and flame-retardant capabilities, ensuring the purity of the gas entering the diesel engine and reducing the emission of pollutants. When it is necessary to discharge gas or input water, the inlet and outlet flanges 30 can realize the switch closure.

[0072] In addition, a control unit is installed inside the flameproof box 10 to control the entire operation process. The control unit monitors the operating status of the diesel engine in real time through sensors and performs automatic control according to a preset program. When it is detected that exhaust or water input is required, the control unit automatically controls the opening and closing of the inlet and outlet flanges 30 to achieve precise operation. At the same time, the control unit can also adjust the working mode of the device according to the environment and operating parameters to ensure the best combustion-supporting and emission-reduction effect.

[0073] Finally, the overall design of the device ensures safe operation in the complex environment of coal mines. The combination of explosion-proof structure and intelligent control not only improves the safety and reliability of the equipment, but also enhances the convenience and efficiency of operation. Through this design, the present invention achieves efficient combustion and emission reduction of diesel engines in coal mines, while providing powerful explosion-proof and water-blocking and flame-retardant functions, ensuring the safety of equipment and operators.

[0074] The front-end combustion-supporting and emission-reducing device for flameproof diesel engines in underground coal mines is designed for the special environment of underground coal mines and has a number of innovative structural features and safety functions. The following is the detailed structural composition and unique design of the device:

[0075] 1. Flameproof box 10:

[0076] The box body is composed of a flameproof shell 11 and a detachable upper cover 12 and a front cover 13, which are connected by thread locking to ensure the sealing in the closed state. The box body is made of a 10mm thick flame-retardant and flame-proof material, which has the function of bearing the pressure generated by the internal explosion and preventing the flame from spreading outward, further enhancing the overall safety.

[0077] 2. Water electrolysis reactor 20:

[0078] It integrates multiple electrode sheets with good conductivity and corrosion resistance to enhance electrolysis efficiency and ensure full contact between the electrolyte and the electrodes, so that the electrolysis reaction can proceed smoothly.

[0079] 3. Water tank 40:

[0080] It has good sealing performance and is used to store electrolyte, ensure the supply of electrolyte, and ensure the continuous electrolysis reaction. The water tank 40 is equipped with a liquid level sensor to monitor the liquid level of the electrolyte in real time to ensure that the electrolyte is within a safe range.

[0081] 4. Inlet and outlet flanges 30:

[0082] The inlet and outlet flanges 30 are arranged on the upper cover 12 of the box body, and filter cotton and fire-blocking elements are installed inside the flanges, which have good gas-water separation and fire-blocking and flame-retardant capabilities, ensuring the purity of the gas entering the diesel engine.

[0083] 5. PWM control circuit 50:

[0084] Provide a stable, non-fluctuating DC power supply to the water electrolysis reactor 20, and achieve precise control of the power supply to the water electrolysis reactor 20.

[0085] 6. Gas pipeline:

[0086] It is made of high-pressure and high-temperature resistant materials to ensure reliability in underground coal mine environments. The pipeline connection uses quick connectors for easy installation and maintenance.

[0087] 7. Control unit:

[0088] Integrated intelligent sensors and control logic to achieve precise control of water electrolysis rate and gas delivery;

[0089] The control unit has a self-diagnosis function, which can monitor the equipment status in real time and automatically shut down in abnormal situations.

[0090] 8. Connectors and fasteners:

[0091] All connectors and fasteners are made of high-strength materials to ensure reliability in the harsh environment of underground coal mines.

[0092] 9. Flameproof box material:

[0093] Made of Q355B material, 10mm thick, to enhance structural strength.

[0094] The front-end combustion-supporting and emission-reduction device of the flameproof diesel engine in underground coal mines not only improves the combustion efficiency and environmental performance of the diesel engine through its innovative design, but more importantly, it ensures the safety of underground coal mine operations through its enhanced flameproof function. It is an innovative invention that combines environmental protection, energy saving and safety design concepts.

[0095] The effective isolation of the flameproof box 10 is achieved by:

[0096] 1. Physical isolation: The box body is composed of a flameproof shell 11 and a detachable upper cover 12 and a front cover 13, which provide basic physical isolation to prevent the flame and pressure from being directly transmitted to the external environment when an explosion occurs inside.

[0097] 2. Sealing design: The flameproof housing 11, the upper cover 12 and the front cover 13 are connected by thread locking to ensure the sealing in the closed state, thus enhancing the isolation effect.

[0098] 3. Box material: The box is made of Q355B with flame retardant and explosion-proof properties. This material can resist high temperature and pressure, further enhancing the isolation performance.

[0099] 4. Monitoring and control system: The flameproof box 10 is equipped with a monitoring and control system to monitor the internal pressure and temperature in real time. Once an abnormality is detected, timely measures can be taken, such as starting the pressure relief device or shutting down the gas supply system, to ensure safety.

[0100] 5. Explosion-proof certification: The design and manufacture of the explosion-proof box 10 comply with relevant explosion-proof standards and specifications, and pass strict testing and certification to ensure its safety and reliability in practical applications.

[0101] Through the above-mentioned design and technical measures, the flameproof box 10 achieves effective isolation, ensuring safe use in flammable and explosive environments such as underground coal mines.

[0102] The coal mine underground flameproof diesel engine front-end combustion-supporting and emission-reducing device provided by the embodiment of the present invention is an innovative technology designed specifically for the coal mine underground environment. It not only improves the combustion efficiency of internal combustion engines, especially diesel engines, but also realizes safe operation in flammable environments through a series of unique designs, while significantly reducing exhaust emissions, achieving the purpose of energy conservation and emission reduction. The following is a detailed description of the core features and working principles of the invention, with particular emphasis on the underground coal mine flameproof function:

[0103] Core Features:

[0104] 1. Hydrogen-oxygen combustion-supporting technology: The device uses a water electrolysis reactor 20 to produce hydrogen and oxygen. These high-energy gases are directly introduced into the combustion chamber through the diesel engine intake system as combustion-supporting agents to participate in combustion, promoting a more efficient and complete combustion process.

[0105] 2. Intelligent control system: The device is equipped with an advanced intelligent control unit that can monitor and respond to the operating status of the diesel engine in real time, accurately adjust the production and delivery of hydrogen and oxygen, ensure on-demand supply, and optimize combustion efficiency.

[0106] 3. Explosion-proof function in coal mines: The device adopts a special explosion-proof box 10 structure, which has excellent flame retardant and explosion-proof properties. The box thickness is 10mm, and the material is Q355B, which ensures safe use in potentially flammable environments.

[0107] 4. Environmental protection and emission reduction: Through the combustion-supporting effect of hydrogen and oxygen, the emission of harmful substances generated during the combustion of diesel engines, such as carbon monoxide and hydrocarbons, is significantly reduced, while the emission of particulate matter in the exhaust gas is effectively reduced.

[0108] 5. Energy-saving effect: Due to the improvement of combustion efficiency, the engine can output the same power at lower fuel consumption, thus achieving significant energy-saving effect.

[0109] 6. Compact structure: The device is compactly designed to adapt to the limited space environment of underground equipment in coal mines, and will not cause major changes to the original structure of the diesel engine.

[0110] Working principle:

[0111] 1. Water electrolysis to produce gas: The water electrolysis reactor 20 uses a DC power supply to decompose the electrolyte into hydrogen and oxygen, providing a safe energy supply method for the underground environment of coal mines.

[0112] 2. Gas collection and transportation: The generated hydrogen and oxygen are safely collected in a special water tank 40 and transported to the intake pipe of the diesel engine through a flameproof piping system.

[0113] 3. Intelligent control: The control unit automatically adjusts the rate of water electrolysis and the amount of gas delivered according to the operating parameters of the diesel engine, such as temperature, pressure, etc., to ensure the best combustion effect while preventing the accumulation of flammable gases.

[0114] 4. Mixed combustion in the combustion chamber: Hydrogen and oxygen are mixed with the air inhaled by the diesel engine and mixed with the fuel in the combustion chamber to achieve more complete combustion and reduce harmful emissions.

[0115] 5. Exhaust gas treatment: Optimized combustion reduces the generation of harmful substances, and after exhaust gas treatment, pollutant emissions are reduced.

[0116] 6. Energy saving and emission reduction: By improving combustion efficiency and reducing fuel consumption, the goals of energy saving and emission reduction are achieved. At the same time, the explosion-proof and flameproof characteristics of the device ensure the safety of underground operations.

[0117] Implementation Cases:

[0118] Flameproof diesel engine combustion-supporting and emission-reduction device:

[0119] The flameproof diesel engine combustion-supporting and emission-reducing device in this embodiment is mainly used to improve the combustion efficiency of the diesel engine, reduce energy waste, reduce tail gas emissions, and reduce environmental pollution.

[0120] The device mainly comprises a flameproof box 10 , a water electrolysis reactor 20 and a PWM control circuit 50 .

[0121] 1. Explosion-proof box 10: The box is made of 10mm thick flame-retardant and explosion-proof material, which has the function of bearing the pressure generated by the internal explosion and preventing the flame from spreading outward, thus enhancing the overall safety.

[0122] 2. Water electrolysis reactor 20: It integrates multiple electrode sheets with good conductivity and corrosion resistance to enhance electrolysis efficiency and ensure that the electrolyte is in full contact with the electrodes, so that the electrolysis reaction can proceed smoothly. The generated hydrogen and oxygen mixed gas is fully input into the engine, which promotes the full combustion of fuel, reduces emissions and increases power.

[0123] 3. PWM control circuit 50: It can provide a stable, non-fluctuating DC power supply to the water electrolysis reactor 20. By precisely regulating the power output, the water electrolysis process can be finely controlled, which not only ensures the maximization of the electrolysis efficiency, but also avoids unnecessary waste of energy.

[0124] 4. Effects and advantages: Improve the combustion rate of the engine mixture, make the fuel burn fully, reduce the carbon deposition behavior of incomplete combustion, thereby reducing the emission of carbon monoxide, hydrocarbons, black smoke and other substances, and achieve emission reduction effects. Full combustion can improve the utilization rate of energy, reduce fuel waste, and thus reduce the fuel consumption of the vehicle.

[0125] Through the above specific implementation cases, it is demonstrated that the front-end combustion-supporting and emission-reducing device for flameproof diesel engines in underground coal mines of the present invention not only has important safety protection functions, but also improves energy utilization and reduces environmental pollution.

[0126] The following are two method embodiments, based on the use of the aforementioned coal mine underground flameproof diesel engine front-end combustion-supporting and emission-reducing device:

[0127] Embodiment 1:

[0128] The process of combustion-supporting and emission-reduction under low-load conditions of diesel engines:

[0129] 1. Equipment startup and water electrolysis reaction control:

[0130] Under low-load conditions of the diesel engine, the control unit detects the speed and load data of the diesel engine through the intelligent sensor and detects that the diesel engine is in a low-load state;

[0131] The control unit adjusts the duty cycle through the PWM control circuit 50 to reduce the electrolysis current intensity, thereby ensuring that an appropriate amount of hydrogen and oxygen gas is generated without excessive combustion.

[0132] 2. Combustion-supporting process:

[0133] The water electrolysis reactor 20 starts to work, the anode produces oxygen, the cathode produces hydrogen, and the hydrogen and oxygen gases are mixed and transported to the diesel engine intake through the gas pipeline;

[0134] The hydrogen-oxygen mixture is mixed with diesel fuel in the intake system and enters the combustion chamber to assist combustion, thereby improving combustion efficiency and reducing harmful emissions such as carbon monoxide and unburned hydrocarbons.

[0135] 3. System monitoring and automatic adjustment:

[0136] The system monitors the diesel engine exhaust temperature and electrolyte level in real time to ensure that the electrolyte in the water tank 40 is within a safe range, and controls the electrolysis rate through feedback from the liquid level sensor;

[0137] Under low-load conditions, the electrolysis rate is low and the amount of hydrogen and oxygen gas generated is relatively small, which not only ensures the combustion-supporting effect but also avoids safety hazards caused by excessive gas generation.

[0138] Embodiment 2:

[0139] The process of combustion-supporting and emission-reduction under high-load conditions of diesel engines:

[0140] 1. Equipment startup and water electrolysis reaction control:

[0141] The diesel engine enters a high-load condition, and the intelligent sensor detects the increase in diesel engine speed and load;

[0142] The control unit increases the electrolysis current intensity and the amount of hydrogen and oxygen gas generated through the PWM control circuit 50 to meet the combustion support requirements of the diesel engine under high load.

[0143] 2. Combustion-supporting process:

[0144] The water electrolysis reactor 20 generates more hydrogen and oxygen, which are quickly transported to the intake system of the diesel engine through a high-pressure and high-temperature resistant gas pipeline;

[0145] Under high load conditions, the injection of hydrogen-oxygen mixed gas effectively improves the combustion efficiency of diesel, reduces black smoke emissions, improves the working efficiency of diesel engines, and reduces the emission of harmful gases such as nitrogen oxides.

[0146] 3. System monitoring and automatic adjustment:

[0147] The control unit monitors the exhaust temperature and electrolysis rate of the diesel engine in real time, and automatically adjusts the working state of the electrolysis reactor according to the change of exhaust temperature;

[0148] Under high load conditions, the electrolysis rate is increased, and at the same time, the electrolyte level in the water tank 40 is constantly monitored to ensure timely replenishment of the electrolyte to prevent the normal operation of the system from being affected by insufficient electrolyte.

[0149] These two embodiments demonstrate how to adjust the water electrolysis reaction to aid combustion and reduce emissions under different diesel engine operating conditions, thereby adapting to changing working environments.

[0150] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A front-end combustion-supporting and emission-reducing device for flameproof diesel engines in underground coal mines, characterized in that: It includes a flameproof box, a water electrolysis reactor, a water tank and a PWM control circuit; wherein: The flameproof box is made of high-strength material and has explosion-proof performance. The flameproof shell ensures that the explosion will not spread to the outside by increasing the wall thickness, and is connected to the upper cover and the front cover through a threaded locking design to prevent explosive gas or dust from entering the interior of the box; The water electrolysis reactor comprises an anode, a cathode and an electrolyte, wherein the anode and the cathode are made of corrosion-resistant conductive materials, the anode generates oxygen during the electrolysis process, and the cathode generates hydrogen, and the electrolyte is an alkaline solution for conducting ions to ensure the continuous progress of the electrolysis reaction; The water tank has sealing performance and is equipped with a liquid level sensor for storing electrolyte and monitoring the liquid level in real time to ensure that the electrolyte supply is within a safe range; The PWM control circuit is used to provide a stable DC power supply and control the current intensity of the electrolytic reactor by adjusting the duty cycle to achieve accurate generation of hydrogen and safe and stable operation of the system.

2. The front-end combustion-supporting and emission-reducing device for flameproof diesel engines in underground coal mines as claimed in claim 1, characterized in that: The inlet and outlet flanges are equipped with filter cotton, which has the functions of water blocking, filtering and gas separation to achieve the control of gas discharge and water input.

3. The front-end combustion-supporting and emission-reducing device for flameproof diesel engines in underground coal mines as claimed in claim 1, characterized in that: The gas transmission pipeline is made of high-pressure and high-temperature resistant materials to ensure reliability in the underground coal mine environment; the pipeline connection adopts quick connectors to facilitate installation and maintenance.

4. The front-end combustion-supporting and emission-reducing device for flameproof diesel engines in underground coal mines as claimed in claim 1, characterized in that: The control unit integrates intelligent sensors and control logic to achieve precise control of water electrolysis rate and gas delivery; the control unit has a self-diagnosis function, which can monitor the equipment status in real time and automatically shut down under abnormal circumstances.

5. The front-end combustion-supporting and emission-reducing device for flameproof diesel engines in underground coal mines according to claim 1, characterized in that: Connectors and fasteners: All connectors and fasteners are made of high-strength materials to ensure reliability in the harsh environment of underground coal mines.

6. The front-end combustion-supporting and emission-reducing device for flameproof diesel engines in underground coal mines as described in claim 1 is characterized in that: The flameproof box is made of Q355B material to enhance corrosion resistance and structural strength; the thickness of the flameproof box is 10mm.

7. A combustion-supporting and emission-reducing method for the front-end combustion-supporting and emission-reducing device for an underground flameproof diesel engine in a coal mine as claimed in any one of claims 1 to 6, characterized in that: include: (1) Connecting the water electrolysis reactor to the diesel engine intake system, and providing the current required for the electrolysis reaction by controlling the PWM control circuit 50; (2) During the electrolysis process, oxygen is generated at the anode and hydrogen is generated at the cathode. The hydrogen-oxygen mixed gas produced by electrolysis is transported to the air intake of the diesel engine through a gas pipeline; (3) The generated hydrogen and oxygen gas is injected into the intake system of the diesel engine and mixed with the fuel to burn, thereby achieving the purpose of supporting combustion and reducing emissions; (4) Monitor the electrolyte level in the water tank in real time to ensure that the electrolyte is supplied within a safe range to maintain the continuous electrolysis reaction.

8. The method for combustion-supporting and emission-reducing of a front-end flameproof diesel engine in an underground coal mine as claimed in claim 7, characterized in that: The invention further comprises a method for adjusting the electrolysis rate according to the operating state of the diesel engine by means of an intelligent control unit, wherein the specific steps are as follows: (1) Detect the operating parameters of the diesel engine, including speed, load and exhaust temperature, through intelligent sensors; (2) Based on the detected parameters, the PWM control circuit automatically adjusts the duty cycle to control the current intensity in the water electrolysis reactor to meet the hydrogen and oxygen gas generation requirements under different operating conditions of the diesel engine; (3) Monitor the rate of water electrolysis reaction in real time to ensure that the amount of hydrogen-oxygen mixed gas generated meets the operating requirements of the diesel engine.

9. The method for combustion-supporting and emission-reducing of a front-end flameproof diesel engine in an underground coal mine as claimed in claim 7, characterized in that: Including the installation and maintenance methods of the pipeline system, the specific steps are as follows: (1) Use high temperature and high pressure resistant gas pipelines to transport hydrogen and oxygen gas from the water electrolysis reactor to the diesel engine air intake, and ensure that the connection between the pipeline and the equipment uses quick connectors to facilitate rapid installation and disassembly; (2) Ensure the air tightness and durability of the pipeline by regularly inspecting and maintaining the pipeline system to avoid leakage in the harsh environment of coal mines.

10. The method for combustion-supporting and emission-reducing of a front-end flameproof diesel engine in an underground coal mine as claimed in claim 7, characterized in that: Including equipment status monitoring and fault handling methods, the specific steps are as follows: (1) Using the self-diagnosis function in the intelligent control unit, the working status of the equipment is monitored in real time, including the working current of the electrolytic reactor, the liquid level of the water tank, and the output status of the PWM control circuit; (2) When an abnormal situation is detected, the system automatically triggers the shutdown procedure, cuts off the power supply and closes the gas transmission pipeline to avoid safety hazards; (3) The system will indicate the fault type through indicator lights or alarm signals, making it easy to quickly locate and handle equipment faults.

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