A hydrogen engine exhaust treatment system and method

Abstract

The present invention relates to the technical field of hydrogen engine and tail gas treatment, and relates to a hydrogen engine emission treatment system and method. The system includes a dewatering unit, a condensing unit and a ventilation duct connecting the two units, the dewatering unit includes a moisture absorption and filtering subunit, the moisture absorption and filtering subunit includes a first shell, a movable plate, a closing plate and a ventilation plate, the movable plate is driven to be connected to the side of the shell top away from the ventilation duct, the closing plate is driven to be connected to the side wall near the top of the shell, and the ventilation plate is driven to be connected to the side wall of the shell outside the dewatering unit. After the tail gas enters the dewatering unit, according to the different connection positions of the movable plate and the inner wall of the dewatering unit and the opening and closing conditions of the closing plate and the ventilation plate, it enters the ventilation duct only after passing through the inside of the shell or only after passing through the outside of the shell. Compared with the prior art, the present invention has the advantages of effectively reducing the influence of high water vapor on the working efficiency of the catalyst, while not affecting the exhaust temperature, ensuring that the catalyst has a higher conversion efficiency at a higher temperature, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen engines and tail gas treatment, and in particular to a hydrogen engine exhaust treatment system and method. Background Art

[0002] Hydrogen fuel engines generally do not supply pure oxygen when burning, but instead supply air. In this way, the nitrogen in the air will produce nitrogen oxides at high temperatures. It is also one of the pollutants in the atmosphere. Therefore, when hydrogen engines are used, their exhaust gases still need to be treated.

[0003] In the prior art, Chinese patent CN217152080U discloses a hydrogen engine exhaust aftertreatment system. The solution points out in the background technology that the only product after hydrogen combustion is water, but when the hydrogen engine is working, it will produce a small amount of hydrocarbons HC, carbon monoxide CO (produced by a small amount of engine oil combustion) and a certain amount of nitrogen oxides NOX (mainly related to the excess air coefficient). X The higher the emission, the more catalytic converter is needed for conversion. Therefore, the solution uses a front-mounted three-way catalytic converter and a rear-mounted H2-DeNO X Catalyst composition affects hydrocarbons HC, carbon monoxide CO and nitrogen oxides NO in exhaust gas X The conversion can convert hydrocarbons HC, carbon monoxide CO and nitrogen oxides NO in the hydrogen engine during lean combustion. X The emission is reduced to a near-zero level. However, since water is one of the main emissions of hydrogen engines, the water content of the emission reaches 30%-40%, which will cause the catalyst surface structure to change and lose catalytic activity. At the same time, when using the SCR catalyst, a box is required to store urea, and then the urea aqueous solution is pumped out by a pump, and then the urea aqueous solution is sprayed into the exhaust pipe before the inlet of the SCR catalyst by an injector, which makes it easy for the water in the exhaust gas and urea to combine. At the same time, because there are many metal ions in ordinary water, these metal ions will affect the SCR system or the engine system when injected into the engine at high temperature. The long-term large-scale combination of urea and water will cause the system to work abnormally, and the system will directly reduce the output power of the engine, and then the throttle needs to be increased to increase the output power, and the fuel consumption will increase, and the parts of the system will also be damaged. Therefore, how to reduce the influence of water on the working efficiency of the catalyst, while not affecting the exhaust temperature, and ensure that the catalyst has a higher conversion efficiency at a higher temperature, for example, the three-way catalyst must have a higher conversion efficiency between 500℃ and 600℃, has become a problem that needs to be solved in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a hydrogen engine emission treatment system and method in order to overcome the defect of the above-mentioned prior art that moisture has a significant impact on the working efficiency of the catalyst and the exhaust temperature.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] According to a first aspect of the present invention, a hydrogen engine exhaust treatment system is provided, the system comprising a dehydration unit, a condensation unit and a ventilation pipe, the exhaust gas enters the system from the dehydration unit, the dehydration unit is connected to the condensation unit through the ventilation pipe, the dehydration unit comprises a moisture absorption filter subunit,

[0007] The moisture absorption and filtering subunit comprises a first shell, a movable plate, a closing plate and a ventilation plate, wherein the first shell is provided with a top opening, the movable plate and the closing plate are located inside the dewatering unit, the movable plate is drivingly connected to a side of the top of the first shell away from the ventilation duct, the closing plate is drivingly connected to a side wall close to the top of the first shell, the ventilation plate is arranged on a side wall of the first shell located outside the dewatering unit, and is drivingly connected to the first shell,

[0008] When the movable plate is connected to the first position, the closed plate is controlled to open and the ventilation plate is controlled to close, and the exhaust gas enters the ventilation duct through the opening of the closed plate, the inside of the first shell and the top opening in sequence; when the movable plate is connected to the second position, the closed plate is controlled to close and the ventilation plate is controlled to open, and the exhaust gas enters the ventilation duct only through the outside of the first shell. The first position and the second position are located on the inner wall of the dehydration unit.

[0009] As a preferred technical solution, the hygroscopic filter subunit also includes a hygroscopic filter element, a filter screen, a fan and a first electric heating structure. The filter screen is arranged in the opening area of ​​the ventilation plate, the fan is arranged between the filter screen and the hygroscopic filter element, and the first electric heating structure is arranged inside the first shell and is located at the bottom of the first shell.

[0010] As a preferred technical solution, the ventilation plate is connected to the side wall of the first shell through a push rod and a motor. The motor is arranged at the connection between the push rod and the ventilation plate. The push rod drives the ventilation plate to move away from the first shell, and the motor drives the ventilation plate to rotate.

[0011] As a preferred technical solution, the filtering subunit and the water removal unit are detachably connected.

[0012] As a preferred technical solution, the dewatering unit includes a first sealing plate and a second sealing plate, the first sealing plate is set at the first position, the second sealing plate is set at the second position, and the movable plate is clamped with the first sealing plate or the second sealing plate.

[0013] As a preferred technical solution, a heat conducting plate is provided at the bottom of the water removal unit.

[0014] As a preferred technical solution, the condensation unit includes a second shell and a condensation subunit, a water storage and drainage subunit and a heating subunit located inside the second shell. The condensation subunit and the heating subunit are arranged on the side of the second shell away from the ventilation duct, and the water storage and drainage subunit is arranged on the side of the heating subunit close to the ventilation duct. The condensation subunit is located above the heating subunit, and the projection of the outer contour edge of the condensation subunit is located within the coverage area of ​​the water storage and drainage subunit.

[0015] As a preferred technical solution, the condensation subunit includes a condenser and a condensation plate, the condenser is arranged on a side of the second shell away from the ventilation duct, and the condensation plate is arranged on a side of the condenser close to the ventilation duct.

[0016] As a preferred technical solution, the liquid storage and drainage sub-unit includes a liquid storage tank and a liquid drainage structure, the liquid drainage structure is arranged at the bottom of the liquid storage tank, the liquid storage tank and the liquid drainage structure are connected by a through hole, a liquid level sensing head is arranged inside the through hole, an electromagnetic structure is arranged at the bottom of the liquid level sensing head, and a liquid level sensor is arranged at the top.

[0017] According to a second aspect of the present invention, a method for treating emissions from a hydrogen engine is provided. The method is implemented using the system and comprises the following steps:

[0018] When the tail gas enters the dehydration unit, the movable plate is driven to connect to the first position, the closing plate is opened, and the ventilation plate is closed;

[0019] When the humidity of the exhaust gas passing through the opening of the closing plate, the interior of the first shell and the top opening is greater than a first preset threshold, the movable plate is driven to connect to the second position, the closing plate is closed, the ventilation plate is opened, and the air flow rate inside the first shell is increased and heated;

[0020] When the exhaust gas enters the ventilation duct, the condensing unit is started to make its temperature lower than the second preset threshold value, so as to separate the moisture in the exhaust gas and heat the exhaust gas after the moisture is separated.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The hydrogen engine emission treatment system provided by the present invention is provided with a first shell, a movable plate, a closing plate and a ventilation plate. The movable plate is connected to the top of the first shell by driving, and can drive the movable plate to connect to the first position or the second position on the inner wall of the dehydration unit. At the same time, the closing plate and the ventilation plate are driven to be in a corresponding state, so that two sets of passages can be obtained. When the movable plate is connected to the first position, the moisture in the exhaust gas can be adsorbed and dehydrated by the moisture absorption filter subunit. When it is connected to the second position, when the moisture absorption efficiency decreases, the inside of the moisture absorption filter subunit can be ventilated to volatilize the moisture. The high-temperature exhaust gas passing through the dehydration unit can be separated from the moisture again by the condensation unit, thereby effectively reducing the moisture content in the exhaust gas, avoiding the exhaust gas from combining with urea when entering the rear exhaust gas treatment system, effectively reducing the influence of high water vapor on the working efficiency of the catalyst, and improving the working efficiency of the exhaust gas treatment system.

[0023] 2. The present invention provides a moisture absorption filter element, a fan and a first electric heating structure in the filter subunit. Starting the fan can speed up the air flow rate, so that the moisture absorbed by the filter subunit evaporates quickly. At the same time, starting the first electric heating structure to generate heat is conducive to further accelerating the volatilization of moisture, so that the moisture absorption filter element can be quickly recycled, while ensuring that the temperature change of the exhaust gas is small, reducing the temperature effect of moisture on the exhaust gas;

[0024] 3. In the present invention, the projection of the outer contour edge of the condensation subunit is located within the coverage area of ​​the water storage and drainage subunit. The tail gas passing through the water removal unit can be condensed into water after contacting the condensation subunit, and the moisture in the tail gas is separated. The condensed water is accumulated by the water storage and drainage subunit and discharged from the condensation unit, thereby realizing secondary water removal. At the same time, the tail gas after the condensed water is separated is heated by the heating subunit to heat it again and reach the working temperature required by the catalyst, which can effectively prevent high water vapor from reducing the working efficiency of the catalyst, and at the same time does not affect the exhaust temperature, thereby ensuring that the catalyst has a higher conversion efficiency at a higher temperature;

[0025] 4. The moisture absorption and filtering subunit and the water removal unit in the present invention can be detachably connected to facilitate later maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a system in an embodiment of the present invention;

[0027] Figure 2 This is a schematic structural diagram of a moisture absorption and filtering subunit in an embodiment of the present invention;

[0028] Figure 3 It is a schematic side view of the structure of the moisture absorption and filtering subunit in an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of the structure of a ventilation plate in an embodiment of the present invention;

[0030] Figure 5 Schematic diagram of the internal structure of the water removal unit in an embodiment of the present invention;

[0031] Figure 6 Schematic diagram of the internal structure of the condensing unit in an embodiment of the present invention;

[0032] Figure 7 Schematic diagram of the bottom cross-sectional structure of the condensing unit in an embodiment of the present invention;

[0033] Wherein: 1. dehydration unit; 2. condensation unit; 3. ventilation duct; 11. dehydration shell; 12. moisture absorption filter subunit; 121. moisture absorption filter shell; 122. movable plate; 123. closing plate; 124. ventilation plate; 125. moisture absorption filter element; 126. filter screen; 127. fan; 128. first electric heating structure; 129. top opening; 1241. micro motor; 1242. push rod; 13. first Sealing plate; 14. Second sealing plate; 15. Heat conducting plate; 21. Condensation shell; 22. Condensation sub-unit; 23. Water storage and drainage sub-unit; 24. Heating sub-unit; 221. Condenser; 222. Condensation plate; 231. Liquid storage tank; 232. Liquid drainage structure; 2321. Liquid drainage hole; 2322. Liquid level sensor head; 2323. Electromagnetic structure; 2324. Water drainage hole; 241. Heating chamber; 242. Second electric heating structure. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0035] Example

[0036] like Figure 1 As shown, this embodiment provides a hydrogen engine exhaust treatment system, which includes a dehydration unit 1, a condensation unit 2 and a ventilation pipe 3. The exhaust gas enters the system from the dehydration unit 1, and the dehydration unit 1 is connected to the condensation unit 2 through the ventilation pipe 3.

[0037] The dewatering unit 1 includes a dewatering housing 11 and a moisture absorption filter subunit 12. In this embodiment, the moisture absorption filter subunit 12 is detachably connected to the bottom of the dewatering unit 1 near the ventilation duct 3. Figure 2 and Figure 3As shown, the moisture absorption filter subunit 12 includes a moisture absorption filter housing 121 (i.e., a first housing), a movable plate 122, a closing plate 123, a ventilation plate 124, a moisture absorption filter element 125, a filter screen 126, a fan 127, a first electric heating structure 128, and a top opening 129. In addition, a heat conduction plate 15 is provided at the bottom of the dewatering housing 11 and extends to the bottom surface of the moisture absorption filter housing 121. Since a large amount of heat is generated during operation of the hydrogen engine, the heat conduction plate 15 is used to conduct the temperature to the bottom of the dewatering housing 11 or the moisture absorption filter housing 121, thereby ensuring the temperature of the exhaust gas.

[0038] The dehydration unit 1 and the condensation unit 2 are built with humidity sensors. The humidity sensor of the dehydration unit 1 is installed at the connection between the moisture absorption filter housing 121 and the ventilation pipe 3, and the humidity sensor of the condensation unit 2 is installed at the connection between the condensation unit 2 and the pipe of the rear exhaust gas treatment system. In other embodiments, a temperature sensor is installed at the same location where the humidity sensor is installed to monitor the exhaust gas temperature.

[0039] The movable plate 122 and the closed plate 123 are located inside the dehydration unit 1. The movable plate 122 is connected to the side of the top opening 129 of the moisture absorption filter housing 121 away from the ventilation duct 3 through an electric drive structure, and the movable plate 122 can be rotatably connected to a specific position of the inner wall of the dehydration unit 1 to realize the division of the exhaust gas into two paths. The closed plate 123 is two sets of door-type structures, which are respectively connected to the two side edges close to the top of the moisture absorption filter housing 121 through an electric drive structure. The two sets of door-type structures are driven to rotate by the two sets of electric drive structures respectively, so as to complete the opening and closing of the two sets of door-type structures. Among them, the electric drive structure can adopt a micro motor, and the movable plate 122 or the closed plate 123 is driven to rotate by the micro motor.

[0040] The ventilation plate 124 is arranged on the side wall of the moisture absorption filter housing 121 located outside the water removal unit 1, and is connected to the moisture absorption filter housing 121 through an electric drive structure. Figure 4 As shown, the electric drive structure can use a micro motor 1241, and the micro motor 1241 drives the ventilation plate 124 to open or close. Specifically, the push rod 1242 is installed on the first shell and close to the top opening 129, and the micro motor 1241 is set at the connection between the push rod 1242 and the ventilation plate 124, specifically, it is set at one end of the push rod 1242, and the motor shaft is connected to the ventilation plate 124; the ventilation plate 124 is connected to the side wall of the first shell through the push rod 1242 and the micro motor 1241, the push rod 1242 drives the ventilation plate 124 to move away from the first shell, and the micro motor 1241 drives the ventilation plate 124 to rotate, so that the ventilation plate 124 is in an open state.

[0041] The moisture absorption filter housing 121 is provided with a top opening 129, i.e., a moisture absorption filter outlet. The moisture absorption filter element 125 is arranged inside the moisture absorption filter housing 121, and silica dehumidification particles can be used. The filter screen 126 is arranged in the opening area of ​​the ventilation plate 124. Figure 1 The central ventilation plate 124 is arranged on two opposite side walls of the moisture absorption filter shell 121, and these two side walls are located outside the dehydration unit 1. The filter 126 is arranged at the openings of the ventilation plate at two positions, which can effectively filter external dust; the fan 127 is arranged between the moisture absorption filter element 125 and the filter 126. Starting the fan 127 can accelerate the air flow rate, so that the moisture in the moisture absorption filter element 125 evaporates quickly with the flow of air; the first electric heating structure 128 is arranged inside the first shell and is located at the bottom of the first shell.

[0042] like Figure 5 As shown, the first position and the second position of the inner wall of the water removal unit 1 are respectively provided with a first sealing plate 13 and a second sealing plate 14. When the motor drives the movable plate 122 to rotate to engage with the first sealing plate 13, the sealing plate 123 is controlled to be opened and the ventilation plate 124 is closed. The exhaust gas enters the ventilation duct 3 through the opening of the sealing plate 123, the moisture absorption filter element 125 inside the first shell and the top opening 129 in sequence. This is the first passage for the exhaust gas to enter the water removal unit 1; when the motor drives the movable plate 122 to rotate to engage with the second sealing plate 14, the sealing plate 123 is controlled to be closed and the ventilation plate 124 is opened. The exhaust gas only enters the ventilation duct 3 through the outside of the first shell, and does not pass through the moisture absorption filter element 125 inside the first shell. This is the second passage for the exhaust gas to enter the water removal unit 1.

[0043] like Figure 6 As shown, the condensing unit 2 includes a condensing shell 21 (i.e., a second shell) and a condensing sub-unit 22, a water storage and drainage sub-unit 23, and a heating sub-unit 24 located inside the condensing shell 21. The condensing sub-unit 22 and the heating sub-unit 24 are arranged on the side of the condensing shell 21 away from the ventilation duct 3, and the water storage and drainage sub-unit 23 is arranged on the side of the heating sub-unit 24 close to the ventilation duct 3. The condensing sub-unit 22 is located above the heating sub-unit 24, and the projection of the outer contour edge of the condensing sub-unit 22 is located within the coverage area of ​​the water storage and drainage sub-unit 23.

[0044] like Figure 6 As shown, the condensation subunit 22 includes a condenser 221 and a condensation plate 222. The condenser 221 is arranged on the side of the second housing away from the ventilation duct 3, and the condensation plate 222 is arranged on the side of the condenser 221 close to the ventilation duct 3. The condensation plate 222 can be made of a metal material with good thermal conductivity, such as brass. The storage and drainage subunit 23 includes a liquid storage tank 231 and a drainage structure 232. The internal structure of the drainage structure 232 is as shown in FIG. Figure 7As shown. The liquid storage tank 231 is arranged on one side of the heating subunit 24 close to the ventilation pipe 3, and the drainage structure 232 is arranged at the bottom of the liquid storage tank 231. The liquid storage tank 231 and the drainage structure 232 are connected by a through hole. A first through hole is arranged at the bottom of the liquid storage tank 231, and a second through hole, i.e., a liquid outlet hole 2321, is arranged in the drainage structure 232. The two through holes are connected so that the condensed water can flow out of the condensing unit 2. Among them, a rotating liquid level sensor head 2322 is arranged inside the liquid outlet hole 2321, an electromagnetic structure 2323 is arranged at the bottom of the liquid level sensor head 2322, and a liquid level sensor is arranged at the top. The liquid level height in the liquid storage tank 231 is detected by the liquid level sensor. The electromagnetic structure 2323 pushes the liquid level sensor head 2322 to be nested in the corresponding first through hole. A water hole 2324 is provided at the bottom of the liquid hole 2321. As the liquid in the liquid storage tank 231 increases, the liquid level sensor detects that the upper liquid level reaches the threshold, and then activates the electromagnetic structure 2323, so that the liquid level sensor head 2322 descends, and then the condensed water enters the liquid hole 2321 through the first through hole and finally flows out of the water hole 2324. In addition, the heating subunit 24 includes a heating chamber 241 and a second electric heating structure 242. The heating chamber 241 is arranged on the side of the second shell away from the ventilation pipe 3, and the second electric heating structure 242 is arranged at the bottom of the second electric heating structure 242.

[0045] The structure of the condensing unit 2 is set up, using the condenser 221 to keep the temperature of the condensing plate 222 below a preset threshold, and making the exhaust gas and the condensing plate 222 directly contact and condense into water, and accumulate the condensed water through the liquid storage tank 231, and after the liquid level sensor of the liquid level sensing head 2322 detects that the liquid level reaches the threshold, the electromagnetic structure 2323 is started to drive the liquid level sensing head 2322 to descend, and then the condensed water in the liquid storage tank 231 enters the liquid hole 2321 through the first through hole at the bottom thereof, and is finally discharged from the water hole 2324. When the liquid level of the liquid level sensing head 2322 drops to the threshold height, the electromagnetic structure 2323 drives the liquid level sensing head 2322 to reset, and the exhaust gas whose temperature is lowered by the condenser 221 is heated again through the second electric heating structure 242, which is beneficial to prevent high water vapor from affecting the working efficiency of the catalyst, and at the same time does not affect the exhaust temperature, ensuring that the catalyst has a higher conversion efficiency at a higher temperature.

[0046] A hydrogen engine emission treatment method is implemented using the above system, and the specific working process is as follows:

[0047] (1) Connect the other end of the dewatering housing 11 to the exhaust pipe of the hydrogen engine, connect the other end of the condensing housing 21 to the exhaust gas treatment system, and connect the heat conducting plate 15 to the heating components of the hydrogen engine;

[0048] (2) The moisture absorption filter housing 121 is installed corresponding to the water removal housing 11. The exhaust gas may have two paths in the moisture absorption filter housing 121, corresponding to different working processes:

[0049] (2.1) When the moisture absorbed by the moisture absorption filter element 125 does not reach the preset threshold, the electric drive structure of the movable plate 122 is started so that the movable plate 122 is engaged with the first sealing plate 13, and the electric drive structure of the sealing plate 123 is started so that the two sets of door-type sealing plates 123 are opened to expose the moisture absorption filter element 125. At this time, the exhaust gas of the hydrogen engine passes through the moisture absorption filter element 125, and the moisture in the exhaust gas is filtered in the moisture absorption filter element 125;

[0050] (2.2) As the working time of the hydrogen engine increases, the moisture absorbed by the moisture absorption filter element 125 reaches a threshold value, and it is difficult to effectively absorb moisture. Then, the humidity sensor built into the dehumidification unit 1 detects that the humidity has risen. After detecting that the humidity of the filtered exhaust gas is greater than the preset threshold value, the electric drive structure of the movable plate 122 is started so that the movable plate 122 is engaged with the second sealing plate 14, thereby completing the closure of the top outlet of the first shell, and at the same time, the electric drive structure of the sealing plate 123 is started so that the two sets of door-type sealing plates 123 are closed, hiding the moisture absorption filter element 125, so that the exhaust gas directly passes through the outside of the first shell and enters the condensation shell 21; then, the push rod 1242 can be started to push the micro motor 1241 outward, and then the micro motor 1241 is started to drive the ventilation plate 124 to rotate, exposing the two sets of filter screens, and the fan 127 is started to speed up the air flow rate so that the moisture in the moisture absorption filter quickly evaporates, and at the same time, the first electric heating structure 128 is started to generate heat, so that the exhaust gas temperature in the dehumidification unit 1 will not drop due to the dehumidification of the moisture absorption filter subunit 12;

[0051] (3) After the exhaust gas enters the condensation housing 21 through the ventilation pipe 3, the condenser 221 is started so that the temperature of the condensation plate 222 is always lower than the preset threshold, and the high-temperature exhaust gas containing a large amount of water will quickly form water after contacting the condensation plate 222;

[0052] (4) Condensed water flows into the corresponding liquid storage tank 231 along the inclined condensation plate 222, and the exhaust gas flows to the rear exhaust gas treatment system through the heating chamber 241. The second electric heating structure 242 in the heating chamber 241 is started to increase the temperature of the exhaust gas;

[0053] (5) As more and more liquid is in the liquid storage tank 231, the liquid level sensor of the liquid level sensing head 2322 detects that the upper liquid level has reached a threshold value, and then activates the electromagnetic structure 2323 to make the liquid level sensing head 2322 descend, and then the condensed water enters the liquid outlet hole 2321 through the first through hole and finally flows out from the water outlet hole 2324;

[0054] A large amount of water has been discharged at the front end of the exhaust gas treatment, making it difficult for the water in the exhaust gas to combine with the urea in the catalyst in large quantities. This can avoid the malfunction of the system caused by the long-term large-scale combination of urea and water, and prevent the system from directly reducing the output power of the engine, thereby requiring increasing the throttle to increase the output power, increasing fuel consumption, and also damaging the system components.

[0055] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A hydrogen engine exhaust treatment system, the system comprising a dehydration unit, a condensation unit and a ventilation pipeline, the exhaust gas enters the system from the dehydration unit, characterized in that: The dewatering unit is connected to the condensing unit through the ventilation pipe, and the dewatering unit includes a moisture absorption and filtering subunit. The moisture absorption and filtering subunit comprises a first shell, a movable plate, a closing plate and a ventilation plate, wherein the first shell is provided with a top opening, the movable plate and the closing plate are located inside the dewatering unit, the movable plate is drivingly connected to a side of the top of the first shell away from the ventilation duct, the closing plate is drivingly connected to a side wall close to the top of the first shell, and the ventilation plate is drivingly connected to a side wall of the first shell located outside the dewatering unit, When the movable plate is connected to the first position, the closed plate is controlled to open and the ventilation plate is controlled to close, and the exhaust gas enters the ventilation duct through the opening of the closed plate, the inside of the first shell and the top opening in sequence; when the movable plate is connected to the second position, the closed plate is controlled to close and the ventilation plate is controlled to open, and the exhaust gas enters the ventilation duct only through the outside of the first shell. The first position and the second position are located on the inner wall of the dehydration unit.

2. The hydrogen engine exhaust treatment system according to claim 1, characterized in that: The hygroscopic filter subunit also includes a hygroscopic filter element, a filter screen, a fan and a first electric heating structure. The filter screen is arranged in the opening area of ​​the ventilation plate, the fan is arranged between the filter screen and the hygroscopic filter element, and the first electric heating structure is arranged inside the first shell and is located at the bottom of the first shell.

3. The hydrogen engine exhaust treatment system according to claim 1, characterized in that: The ventilation plate is connected to the side wall of the first shell through a push rod and a motor. The motor is arranged at the connection between the push rod and the ventilation plate. The push rod drives the ventilation plate to move away from the first shell, and the motor drives the ventilation plate to rotate.

4. The hydrogen engine exhaust treatment system according to claim 1, characterized in that: The filtering subunit is detachably connected to the water removal unit.

5. The hydrogen engine exhaust treatment system according to claim 1, characterized in that: The dewatering unit includes a first sealing plate and a second sealing plate, the first sealing plate is arranged at the first position, the second sealing plate is arranged at the second position, and the movable plate is clamped with the first sealing plate or the second sealing plate.

6. The hydrogen engine exhaust treatment system according to claim 1, characterized in that: A heat conducting plate is provided at the bottom of the water removal unit.

7. The hydrogen engine exhaust treatment system according to claim 1, characterized in that: The condensing unit includes a second shell and a condensing subunit, a water storage and drainage subunit and a heating subunit located inside the second shell. The condensing subunit and the heating subunit are arranged on a side of the second shell away from the ventilation duct, and the water storage and drainage subunit is arranged on a side of the heating subunit close to the ventilation duct. The condensing subunit is located above the heating subunit, and the projection of the outer contour edge of the condensing subunit is located within the coverage area of ​​the water storage and drainage subunit.

8. The hydrogen engine exhaust treatment system according to claim 7, characterized in that: The condensation subunit comprises a condenser and a condensation plate. The condenser is arranged on a side of the second shell away from the ventilation duct, and the condensation plate is arranged on a side of the condenser close to the ventilation duct.

9. The hydrogen engine exhaust treatment system according to claim 7, characterized in that: The liquid storage and drainage subunit includes a liquid storage tank and a liquid drainage structure, wherein the liquid drainage structure is arranged at the bottom of the liquid storage tank, the liquid storage tank and the liquid drainage structure are connected by a through hole, a liquid level sensing head is arranged inside the through hole, an electromagnetic structure is arranged at the bottom of the liquid level sensing head, and a liquid level sensor is arranged at the top.

10. A method for treating emissions from a hydrogen engine, characterized in that: The method is implemented using a system as described in any one of claims 1 to 9, comprising the following steps: When the tail gas enters the dehydration unit, the movable plate is driven to connect to the first position, the closing plate is opened, and the ventilation plate is closed; When the humidity of the exhaust gas passing through the opening of the closing plate, the interior of the first shell and the top opening is greater than a first preset threshold, the movable plate is driven to connect to the second position, the closing plate is closed, the ventilation plate is opened, and the air flow rate inside the first shell is increased and heated; When the exhaust gas enters the ventilation duct, the condensing unit is started to make its temperature lower than the second preset threshold value, so as to separate the moisture in the exhaust gas and heat the exhaust gas after the moisture is separated.

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