A hydrogen engine emission detection device with auxiliary exhaust gas collection

Abstract

This utility model discloses a hydrogen engine emission detection device for auxiliary collection of exhaust gas, including a device shell, an air inlet and an air outlet fixedly connected to both sides of the device shell, a water storage base fixedly connected to the top of the device shell, a spray base provided at the bottom of the water storage base, a spray head rotatably connected to the bottom of the spray base, a stirring assembly fixedly connected to the top of the water storage base for stirring the spray water inside the water storage base, a filter base fixedly connected to the front of the device shell, filter plates fixedly connected to both ends of the inner wall of the filter base, and a still water base fixedly connected to the bottom of the device shell. This utility model uses a servo motor and a transmission rod to rotate the spray head on the outside of the spray base, thereby expanding the spraying range of the spray base and improving the working efficiency of exhaust gas treatment. The sprayed wastewater flows into the inner side of the still water base through the two filter plates in sequence, and the wastewater is filtered in multiple stages by the two filter plates, which facilitates subsequent recycling.

Description

Technical Field

[0001] This utility model relates to the field of gas detection devices, and in particular to a hydrogen engine emission detection device for auxiliary collection of exhaust gas. Background Technology

[0002] As we all know, with the scarcity of global oil resources and the continuous rise in fuel prices, countries are increasingly calling for energy conservation, governments are paying more and more attention to energy conservation and emission reduction, and various car fuel-saving devices are emerging.

[0003] The emergence and development of automobiles have rapidly promoted social development and improved people's living standards. However, automobiles have also brought serious energy and environmental problems to mankind. Currently, automobiles consume a large amount of petroleum resources and emit large amounts of pollutants such as greenhouse gases, carbon monoxide, nitrogen oxides, and incomplete combustion substances. These gases need to be detected by emission testing devices.

[0004] However, most existing emission detection devices use water spraying to treat exhaust gas. However, their internal nozzles are generally sprayed in fixed positions. When removing dust from exhaust gas, the spraying range is limited, and long-term spraying is required, resulting in low efficiency. In addition, a lot of clean water needs to be sprayed, which wastes resources. Furthermore, there is no way to recycle the wastewater after spraying, resulting in low water resource utilization. Utility Model Content

[0005] In order to overcome the problems of limited spraying range, long spraying time, low efficiency, large amount of water wasted, and low water utilization rate caused by the lack of wastewater recycling after spraying when removing dust from exhaust gas.

[0006] The technical solution of this utility model is as follows: a hydrogen engine emission detection device for auxiliary collection of exhaust gas, comprising a device shell, an air inlet and an air outlet fixedly connected to both sides of the device shell respectively, a water storage base fixedly connected to the top of the device shell, a spray seat provided at the bottom of the water storage base, a spray head rotatably connected to the bottom of the spray seat, a stirring assembly fixedly connected to the top of the water storage base for stirring the spray water inside the water storage base, a filter seat fixedly connected to the front of the device shell, filter plates fixedly connected to both ends of the inner wall of the filter seat, and a still water base fixedly connected to the bottom of the device shell; the stirring assembly includes a servo motor, a transmission rod fixedly connected to the output end of the servo motor, the servo motor being the driving mechanism of the transmission rod, a stirring fan blade provided on the outer side of the transmission rod, and the bottom end of the transmission rod extending to the outer side of the spray seat and fixedly connected to the spray head; when the servo motor drives the transmission rod to rotate, the transmission rod, in conjunction with the stirring fan blade, stirs the inner side of the water storage base, and the transmission rod drives the spray head to rotate on the outer side of the spray seat.

[0007] Preferably, a servo motor, in conjunction with a transmission rod, causes the spray head on the outside of the spray seat to rotate, thereby expanding the spraying range of the spray seat and improving the efficiency of waste gas treatment. The sprayed wastewater flows into the inner side of the still water seat through two filter plates, where it undergoes multi-stage filtration, facilitating subsequent recycling.

[0008] Preferably, an air intake mechanism is provided on one side of the device housing. The air intake mechanism includes a rotary motor and an air intake fan. A dustproof net is provided on the outside of the air intake mechanism. When the air intake mechanism is started, it draws the exhaust gas into the inside of the device housing through the air inlet.

[0009] Preferably, a gas detection sensor (MEMS gas sensor integrates multiple gas detection functions, supports wide voltage input and I2C output, is compatible with common main control devices, has built-in calculation formulas to simplify the development process, and is suitable for the detection of gas and exhaust gas emissions in the vehicle body) is fixedly connected to the bottom end of the side of the intake mechanism located on the inner wall of the device housing. When the exhaust gas is inside the device housing, the exhaust gas is detected by the gas detection sensor.

[0010] Preferably, electronic valves are installed inside both the air inlet and the air outlet, and a display panel is fixedly connected to the front end of the device housing. The display panel is electrically connected to the electronic valves, the air intake mechanism, the stirring mechanism, and the water storage base, and the electronic valves, air intake mechanism, and stirring mechanism can be controlled separately through the display panel.

[0011] Preferably, a water pump is fixedly connected to the rear end of the water storage base, and the bottom end of the water pump extends to the inside of the still water base. When the water pump is started, the water pump delivers water from the inner wall of the still water base to the inside of the water storage base through the water pipe.

[0012] Preferably, a high-pressure pump is fixedly connected to the rear end of the spray base, and the top of the high-pressure pump extends to the inside of the water storage base. The spray base, in conjunction with the high-pressure pump, sprays water from the inner wall of the water storage base onto the inside of the device casing.

[0013] Preferably, there are two filter plates, and the inner side of the two filter plates is provided with filter holes. When the sprayed wastewater flows into the inner side of the still water seat after passing through the two filter plates in sequence.

[0014] The beneficial effects of this utility model are:

[0015] 1. The hydrogen engine emission detection device for auxiliary collection of exhaust gas uses a servo motor and a transmission rod to rotate the spray head on the outside of the spray seat, thereby expanding the spraying range of the spray seat and improving the working efficiency of exhaust gas treatment.

[0016] 2. The hydrogen engine emission detection device with auxiliary exhaust gas collection allows the sprayed wastewater to flow into the inner side of the still water seat through two filter plates in sequence. The wastewater undergoes multi-stage filtration through the two filter plates, facilitating subsequent recycling. Attached Figure Description

[0017] Figure 1 The diagram shown illustrates the overall structure of the hydrogen engine emission detection device for auxiliary exhaust gas collection according to this utility model. Figure 1 ;

[0018] Figure 2 The diagram shown illustrates the overall structure of the hydrogen engine emission detection device for auxiliary exhaust gas collection according to this utility model. Figure 2 ;

[0019] Figure 3 The diagram shown is a structural schematic of the outer casing of the hydrogen engine emission detection device for auxiliary exhaust gas collection according to this utility model.

[0020] Figure 4 The diagram shown is a schematic representation of the spray head structure of the hydrogen engine emission detection device for auxiliary exhaust gas collection according to this utility model.

[0021] Figure 5 The diagram shown is a schematic of the water storage base structure of the hydrogen engine emission detection device for auxiliary exhaust gas collection according to this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Device housing; 2. Air inlet; 3. Display panel; 4. Filter base; 5. Water storage base; 6. Servo motor; 7. Static water base; 8. Air intake mechanism; 9. Air outlet; 10. Spray head; 11. Spray base; 12. Filter plate; 13. Gas detection sensor; 14. Transmission rod; 15. Stirring fan blade. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] hydrogen fuel cell system

[0025] 1. As the current mainstream technology, it directly converts hydrogen energy into electrical energy through electrochemical reactions.

[0026] The core components include:

[0027] Proton exchange membranes (PEMs): These utilize the microchannel structure (2-4 nm in diameter) of perfluorosulfonic acid materials (such as Nafion membranes) to achieve selective hydrogen ion conduction. The operating temperature must be strictly controlled below 80°C to prevent membrane dehydration and embrittlement. Recent research shows that using graphene-doped composite membranes can increase proton conductivity by 40%.

[0028] Membrane electrode assembly (MEA): Employs an ultra-thin design (thickness <20μm) with an integrated catalyst layer (platinum loading 0.2-0.4mg / cm³). 2 A carbon paper gas diffusion layer (porosity 70-80%) and a proton exchange membrane are bonded together using a precision hot-pressing process to ensure an interfacial contact resistance of less than 10 mΩ·cm. 2 Currently, Toyota's fourth-generation fuel cell stack has achieved a single-cell output voltage of 0.75V@2A / cm. 2 Stable output;

[0029] Hydrogen storage system: The 70MPa carbon fiber wound high-pressure cylinder uses T700 grade fiber (tensile strength 4.9GPa) and an aluminum alloy inner liner, with a mass hydrogen storage density of 5.7wt%. The cryogenic liquid hydrogen system adopts a multi-layer vacuum insulation design (daily evaporation rate <0.3%). Kawasaki Heavy Industries of Japan has built the world's first liquid hydrogen transport ship.

[0030] Typical applications include the Toyota Mirai fuel cell vehicle, whose second-generation system uses self-humidifying technology to reduce auxiliary components by 30%, and combined with a V-shaped flow field design to achieve a system efficiency of 60%, enabling a range of 650km under JC08 conditions. The Hyundai NEXO, on the other hand, increases its power density to 4.4kW / L through a modular stack design.

[0031] 2. Hydrogen internal combustion engine unit

[0032] Retain the traditional internal combustion engine structure but require targeted improvements:

[0033] Fuel supply system: It adopts 35MPa high-pressure common rail direct injection technology, combined with a multi-hole nozzle with a 200μm aperture to achieve 0.1ms-level precise injection, and controls the air-fuel ratio in the range of 2.5-3.0 to suppress backfire;

[0034] Ignition system: Spark plugs with iridium alloy electrodes (melting point 2454℃) are used in conjunction with enhanced coils to increase ignition energy to over 50mJ to cope with the characteristic that the flame propagation speed of hydrogen (3.25m / s) is 8 times that of gasoline;

[0035] Exhaust gas treatment: The two-stage SCR system uses a vanadium-based catalyst and a molecular sieve coating to achieve a NOx conversion rate of >95% within a 250-400℃ window. Yuchai's latest model has passed the EU Stage V certification.

[0036] II. Key Technological Breakthroughs and Industrial Progress

[0037] 1. Efficiency Optimization Path

[0038] Fuel cell field:

[0039] The Fe-NC catalyst developed by the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, achieves a current density of 40 mA / cm² at a potential of 0.9 V.2 Accelerated durability testing showed that performance degradation was less than 15% after 30,000 cycles;

[0040] The 3D wave-shaped flow field design proposed by Tsinghua University increases the power density of the fuel cell stack to 4kW / L, while reducing the voltage drop by 18%.

[0041] In the field of hydrogen internal combustion engines:

[0042] Weichai Power has improved its thermal efficiency to 44.3% by using a 30% EGR rate combined with a pre-ignition suppression strategy.

[0043] FAW Jiefang's hydraulic variable valve timing system (HVVS) improves intake efficiency by 22%.

[0044] 2. China's industrialization process

[0045] In the shipbuilding sector: China Shipbuilding Industry Corporation's 3,000-ton hydrogen-electric hybrid cargo ship uses four 200kW fuel cells in conjunction with a 2MW lithium battery pack, and its power system has been certified by CCS "Guidelines for Inspection of Hydrogen Fuel Cell Powered Ships".

[0046] Construction machinery: XCMG Group's hydrogen-powered loaders are equipped with a 120kW fuel cell + 240kWh battery, extending the working time by 40%, and have been applied to the bulk cargo terminal of Tangshan Port;

[0047] Policy support: In 2025, subsidies for the hydrogen energy industry will shift to "rewards instead of subsidies," with a focus on supporting the localization of core components such as fuel cell stacks and membrane electrodes.

[0048] III. Future Development Trends and Challenges

[0049] 1. Direction of technological evolution

[0050] A combined cycle system consisting of a solid oxide fuel cell (SOFC) and a micro gas turbine was demonstrated by Mitsubishi Heavy Industries, achieving a power generation efficiency of 65% at an operating temperature of 850°C.

[0051] In liquid organic hydrogen storage carrier (LOHC) technology, the dibenzyltoluene system developed by Hydrogenious GmbH in Germany can achieve a hydrogen storage capacity retention rate of >99.5% after 200 cycles.

[0052] Hydrogen engines need to be tested by an emissions testing device before they can be used.

[0053] The engine testing device is a high-precision analytical instrument used to detect engine exhaust emissions. It is primarily used for emission monitoring of ships, construction machinery, and gasoline / diesel / LPG / CNG fuel engines, and is applicable to vehicle inspection stations, environmental monitoring, and scientific research. This equipment is manufactured by companies such as Xiamen Donghong Instruments and Shandong Qinong Technology, with some products sourced from Europe or Germany.

[0054] This analyzer combines electrochemical and NDIR infrared technologies, achieving a CO measurement resolution of 1 ppm. It supports simultaneous measurement of NO / NO2 dual components, directly calculating the true NOx concentration. Its compact design includes a triple filtration unit, a gas-liquid separation system, and a 12V DC power interface, supporting mobile vehicle applications. The device integrates engine operating parameter detection (such as oil temperature and speed), external printer connectivity, and PC data transmission. Dedicated software can convert exhaust gas concentration into specific emission values. Some models include an OBD module for online measurement; maintenance requires regular gas calibration and component cleaning.

[0055] A renowned domestic internal combustion engine research institute conducted real-world testing of the INFRALYT ELD diesel engine-specific emission analyzer in its research on a general-purpose calculation system for engine exhaust emission testing. The test results showed that the INFRALYT ELD analyzer's results for CO, CO2, NOx, and O2 were very close to those of large-scale emission tests. It is the only portable diesel engine emission analyzer on the market. Our company collaborated with the institute to develop general-purpose calculation software for engine exhaust emission testing, specifically for diesel engine operating conditions. This software converts the instantaneous exhaust gas volume concentration detected by the equipment into a final specific emission value expressed in g / kW·h.

[0056] Please see Figures 1-5 This utility model provides an embodiment: a hydrogen engine emission detection device for auxiliary exhaust gas collection, including a device housing 1. An air inlet 2 and an air outlet 9 are fixedly connected to both sides of the device housing 1. A water storage base 5 is fixedly connected to the top of the device housing 1. A spray base 11 is provided at the bottom of the water storage base 5. A spray head 10 is rotatably connected to the bottom of the spray base 11. A stirring assembly is fixedly connected to the top of the water storage base 5 for stirring the spray water inside the water storage base 5. A filter base 4 is fixedly connected to the front end of the device housing 1. Both ends of the inner wall of the filter base 4 are fixedly connected to... The filter plate 12 and the bottom of the device housing 1 are fixedly connected to a water stabilizing base 7; the stirring assembly includes a servo motor 6, the output end of which is fixedly connected to a transmission rod 14. The servo motor 6 is the driving mechanism for the transmission rod 14. A stirring blade 15 is provided on the outer side of the transmission rod 14. The bottom end of the transmission rod 14 extends to the outer side of the spray seat 11 and is fixedly connected to the spray head 10. When the servo motor 6 drives the transmission rod 14 to rotate, the transmission rod 14, in conjunction with the stirring blade 15, stirs the inner side of the water storage base 5. The transmission rod 14 drives the spray head 10 to rotate on the outer side of the spray seat 11.

[0057] Please see Figures 2-3In this embodiment, a suction mechanism 8 is provided on one side of the device housing 1. The suction mechanism 8 includes a rotary motor and a suction fan. A dustproof net is provided on the outside of the suction mechanism 8. When the suction mechanism 8 is started, the suction mechanism 8 draws the exhaust gas into the inside of the device housing 1 through the air inlet 2. A gas detection sensor 13 is fixedly connected to the bottom of the side of the suction mechanism 8 located on the inner wall of the device housing 1. When the exhaust gas is inside the device housing 1, the exhaust gas is detected by the gas detection sensor 13. Electronic valves are provided on the inside of the air inlet 2 and the air outlet 9. A display panel 3 is fixedly connected to the front end of the device housing 1. The display panel 3 is electrically connected to the electronic valve, the suction mechanism 8, the stirring mechanism, and the water storage base 5. The electronic valve, the suction mechanism 8, and the stirring mechanism can be controlled separately through the display panel 3.

[0058] Please see Figures 4-5 In this embodiment, a water pump is fixedly connected to the rear end of the water storage base 5. The bottom end of the water pump extends to the inside of the still water base 7. When the water pump is started, it transports water from the inner wall of the still water base 7 to the inside of the water storage base 5 through a water pipe. A high-pressure pump is fixedly connected to the rear end of the spray base 11. The top end of the high-pressure pump extends to the inside of the water storage base 5. The spray base 11, in conjunction with the high-pressure pump, sprays water from the inner wall of the water storage base 5 to the inside of the device housing 1. Two filter plates 12 are provided. Filter holes are opened on the inner side of the two filter plates 12. After spraying, the wastewater flows into the inside of the still water base 7 through the two filter plates 12 in sequence.

[0059] When in operation, the power is turned on and the device is started. When the suction mechanism 8 is started, the rotary motor in the suction mechanism 8, together with the suction fan, draws the exhaust gas into the inner side of the device housing 1 through the air inlet 2. Then, the electronic valve on the inner wall of the air inlet 2 is closed. The exhaust gas is detected and displayed by the gas detection sensor 13. After the detection is completed, the disinfectant water in the water storage seat 5 is sprayed into the exhaust gas through the spray seat 11. At the same time as the spray seat 11 sprays, the servo motor 6, together with the transmission rod 14, makes the spray head 10 on the outside of the spray seat 11 rotate, thereby expanding the spray range of the spray seat 11 through the spray head 10 and improving the working efficiency of exhaust gas treatment. The sprayed wastewater flows into the inner side of the still water seat 7 through the two filter plates 12 in sequence. The wastewater is filtered in multiple stages through the two filter plates 12, which facilitates subsequent recycling. The treated exhaust gas is then discharged through the air outlet 9.

[0060] Through the above steps, the servo motor 6, in conjunction with the transmission rod 14, causes the spray head 10 on the outside of the spray seat 11 to rotate, thereby expanding the spraying range of the spray seat 11 and improving the working efficiency of waste gas treatment. After spraying, the wastewater flows into the inner side of the still water seat 7 through two filter plates 12. The wastewater is filtered in multiple stages by the two filter plates 12, which facilitates subsequent recycling. This solves the problems of limited spraying range, long spraying time, low efficiency, large amount of water wasted, and low water utilization rate in existing waste gas dust removal processes.

Claims

1. A hydrogen engine emission detection device for auxiliary exhaust gas collection, comprising a device housing (1), characterized in that: It also includes an air inlet (2) and an air outlet (9) fixedly connected to both sides of the device housing (1), a water storage base (5) fixedly connected to the top of the device housing (1), a spray base (11) provided at the bottom of the water storage base (5), a spray head (10) rotatably connected to the bottom of the spray base (11), a stirring assembly fixedly connected to the top of the water storage base (5), the stirring assembly being used to stir the spray water inside the water storage base (5), a filter base (4) fixedly connected to the front end of the device housing (1), filter plates (12) fixedly connected to both ends of the inner wall of the filter base (4), and a still water base (7) fixedly connected to the bottom of the device housing (1). The stirring assembly includes a servo motor (6), and the output end of the servo motor (6) is fixedly connected to a transmission rod (14). The servo motor (6) is the driving mechanism of the transmission rod (14). A stirring blade (15) is provided on the outside of the transmission rod (14). The bottom end of the transmission rod (14) extends to the outside of the spray seat (11) and is fixedly connected to the spray head (10). When the servo motor (6) drives the transmission rod (14) to rotate, the transmission rod (14) works with the stirring blade (15) to stir the inside of the water storage seat (5). The transmission rod (14) drives the spray head (10) to rotate on the outside of the spray seat (11).

2. The hydrogen engine emission detection device for auxiliary exhaust gas collection according to claim 1, characterized in that: An air intake mechanism (8) is provided on one side of the device housing (1). The air intake mechanism (8) includes a rotary motor and an air intake fan. A dustproof net is provided on the outside of the air intake mechanism (8). When the air intake mechanism (8) is started, the air intake mechanism (8) draws the exhaust gas into the inside of the device housing (1) through the air inlet (2).

3. The hydrogen engine emission detection device for auxiliary exhaust gas collection according to claim 2, characterized in that: A gas detection sensor (13) is fixedly connected to the bottom of the side of the suction mechanism (8) located on the inner wall of the device housing (1). When the exhaust gas is inside the device housing (1), the exhaust gas is detected by the gas detection sensor (13).

4. The hydrogen engine emission detection device for auxiliary exhaust gas collection according to claim 1, characterized in that: Electronic valves are installed on the inner side of both the air inlet (2) and the air outlet (9). A display panel (3) is fixedly connected to the front end of the device housing (1). The display panel (3) is electrically connected to the electronic valve, the air intake mechanism (8), the stirring mechanism, and the water storage base (5). The electronic valve, the air intake mechanism (8), and the stirring mechanism can be controlled separately through the display panel (3).

5. The hydrogen engine emission detection device for auxiliary exhaust gas collection according to claim 1, characterized in that: A water pump is fixedly connected to the rear end of the water storage base (5). The bottom end of the water pump extends to the inside of the still water base (7). When the water pump is started, it transports water from the inner wall of the still water base (7) to the inside of the water storage base (5) through the water pipe.

6. The hydrogen engine emission detection device for auxiliary exhaust gas collection according to claim 1, characterized in that: A high-pressure pump is fixedly connected to the rear end of the spray seat (11). The top of the high-pressure pump extends to the inside of the water storage seat (5). The spray seat (11) works with the high-pressure pump to spray water from the inner wall of the water storage seat (5) onto the inside of the device housing (1).

7. The hydrogen engine emission detection device for auxiliary exhaust gas collection according to claim 1, characterized in that: There are two filter plates (12), and filter holes are opened on the inner side of the two filter plates (12). When the sprayed wastewater flows into the inner side of the still water seat (7) through the two filter plates (12) in sequence.

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