A device for removing moisture from hydrogen fuel cell exhaust gas

Abstract

This invention relates to the field of hydrogen fuel cell technology, specifically to a hydrogen fuel cell exhaust gas moisture removal device. This device connects the residual oxygen connector and residual hydrogen connector of a hydrogen fuel cell and removes moisture from the residual oxygen and residual hydrogen, respectively. It includes a fixed cylinder, a rotating disk, and a rotation drive assembly. By setting a first baffle channel, a second baffle channel, a first guide channel, and a second guide channel within the fixed cylinder, and cooperating with the rotating disk to periodically switch the drying chamber, the problem of insufficient drying and recycling of existing hydrogen fuel cell exhaust gas is solved.

Description

Technical Field

[0001] This invention relates to the field of hydrogen fuel cell technology, specifically to a device for removing moisture from hydrogen fuel cell exhaust gas. Background Technology

[0002] With the increasing global awareness of environmental protection and the rapid development of new energy vehicle technology, hydrogen fuel cell vehicles have become an important development direction in the transportation sector due to their significant advantages such as zero emissions and high energy efficiency. During the operation of hydrogen fuel cell vehicles, the only byproduct produced by the electrochemical reaction is water, which is discharged outside the vehicle with the exhaust gas. However, if the large amount of water carried in the exhaust gas is directly emitted, it may not only form fog behind the vehicle, affecting the visibility of drivers behind, but also easily condense on the road surface in low-temperature environments, causing slippery roads and increasing the risk of traffic accidents. Therefore, efficiently removing moisture from hydrogen fuel cell exhaust gas has become a key technological requirement for improving vehicle safety and environmental adaptability.

[0003] During operation, hydrogen fuel cells generate moisture in both the cathode and anode chambers. The anode chamber produces a small amount of moisture and unreacted hydrogen, while the cathode chamber generates a large amount of moisture and unreacted oxygen. This residual hydrogen and oxygen can be recycled after proper drying to improve the economic efficiency and environmental friendliness of hydrogen fuel cells. However, current methods for removing moisture from exhaust gases primarily rely on physical interception principles, such as installing baffle structures in the exhaust path. The collision and contact between the airflow and the baffles causes some liquid water to adhere and separate. While this method is simple and low-cost, its moisture removal efficiency is limited. Especially in high-temperature and high-humidity or low-temperature environments, water films or ice layers easily form on the baffle surface, leading to gas path blockage or secondary moisture evaporation, making it difficult to achieve stable and efficient liquid-gas separation.

[0004] Furthermore, existing technologies for recovering and utilizing residual hydrogen and oxygen in the exhaust gases from the anode and cathode often employ desiccant adsorption for dehydration. However, desiccants gradually become saturated after adsorbing a certain amount of moisture, resulting in a significant decrease in adsorption capacity. Regeneration or replacement is necessary to restore the drying effect, which not only increases the complexity of system operation but also limits its reliability under continuous operating conditions. Especially under high-power or long-term operating conditions, the frequent maintenance requirements of the desiccant reduce the practicality and economy of the entire vehicle.

[0005] Therefore, there is an urgent need for a new type of moisture removal device that is efficient, stable and adaptable, capable of effectively dealing with changes in exhaust gas humidity under different environmental conditions, while also taking into account the need for the recovery and utilization of residual hydrogen and residual oxygen, thereby further improving the overall performance and safety of hydrogen fuel cell vehicles. Summary of the Invention

[0006] To address the problems existing in the prior art, a hydrogen fuel cell exhaust gas moisture removal device is provided. By setting a first baffle channel, a second baffle channel, a first diversion channel, and a second diversion channel in a fixed cylinder, and cooperating with a rotating disk to periodically switch the drying chamber, the problem of insufficient drying and recycling of existing hydrogen fuel cell exhaust gas is solved.

[0007] To address the problems of existing technologies, this invention provides a hydrogen fuel cell exhaust moisture removal device for connecting the residual oxygen connector and the residual hydrogen connector of a hydrogen fuel cell, and removing moisture from the residual oxygen and residual hydrogen respectively. The device includes: a fixed cylinder with a coaxially arranged mounting cavity inside, and a first baffle channel, a second baffle channel, a first guide channel, and a second guide channel circumferentially distributed around the axis of the fixed cylinder, each channel communicating with the mounting cavity; wherein the first baffle channel communicates with the residual oxygen connector, the second baffle channel communicates with the residual hydrogen connector, and both the first and second guide channels are equipped with guide fans; the outer ports of the first and second guide channels are used for heat exchange with the heat output from the hydrogen fuel cell; a dried residual oxygen outlet, a dried residual hydrogen outlet, a first hot air channel, and a second hot air channel are provided at one end of the fixed cylinder. Hot air passage; the dry residual oxygen outlet is coaxially corresponding to the first baffle channel, the dry residual hydrogen outlet is coaxially corresponding to the second baffle channel, the first hot air passage is coaxially corresponding to the first drainage channel, and the second hot air passage is coaxially corresponding to the second drainage channel; a rotating disk is coaxially rotatably disposed in the mounting cavity, and four independent drying chambers are provided circumferentially inside the rotating disk, each drying chamber being filled with desiccant; a rotation drive assembly is disposed on the fixed cylinder and is used to drive the rotating disk to rotate periodically by a predetermined angle; when the rotating disk is at a certain working angle, the first drying chamber is connected to the first baffle channel and the dry residual oxygen outlet, the second drying chamber is connected to the second baffle channel and the dry residual hydrogen outlet, the third drying chamber is connected to the first drainage channel and the first hot air passage, and the fourth drying chamber is connected to the second drainage channel and the second hot air passage.

[0008] Preferably, the bottom of both the first and second deflector channels is provided with a water collection trough extending along their length, and a drain pipe communicating with the outside is provided in the fixed cylinder, with a collection pipe communicating with the bottom of the water collection trough on the drain pipe.

[0009] Preferably, the first and second deflector channels are provided with partitions arranged at equal intervals along their length, and a partition ring is provided between adjacent partitions.

[0010] Preferably, the partition ring and the partition plate are coaxially rotatably disposed in the first baffle channel and the second baffle channel. The first baffle channel and the second baffle channel are also provided with a rotating shaft coaxial with them. The rotating shaft passes through the partition plate and is fixedly connected to the partition plate. One end of the rotating shaft extends to the outside of the fixed cylinder and is connected to the rotation drive assembly. A connecting net distributed along its circumference is provided between each partition ring and the adjacent partition plate.

[0011] Preferably, the outer edge of the partition ring is provided with a circumferentially distributed groove, the groove extending radially along the partition ring, and the inner walls of the first and second deflection channels are provided with circumferentially distributed scraper rollers, each scraper roller having a coaxial annular groove, the annular groove slidingly engaging with the groove.

[0012] Preferably, the drainage fan includes a drainage shaft, which is coaxially and rotatably disposed in the first drainage channel and the second drainage channel, and blades are disposed on the circumferential surface of the drainage shaft; the rotation drive assembly includes a motor and a main shaft, the motor is disposed at one end of the fixed cylinder, the main shaft is rotatably disposed in the fixed cylinder, the ends of the drainage shaft and the rotation shaft are drivenly connected to one end of the main shaft, and the other end of the main shaft is drivenly connected to the motor.

[0013] Preferably, the rotary drive assembly further includes: a transmission sleeve, coaxially fixedly mounted on the main shaft; an electromagnet, mounted inside a fixed cylinder, with its working end facing the rotating disk; a sliding sleeve, coaxially slidably mounted in the rotating disk and splinedly connected to the rotating disk, with one end of the sliding sleeve having an abutment ring for abutting against the transmission sleeve and the other end having a limit ring; and an elastic element, sleeved on the sliding sleeve, with both ends of the elastic element acting on the inner wall of the rotating disk and the limit ring respectively. When the electromagnet is activated, the abutment ring coaxially abuts against the transmission sleeve to transmit torque.

[0014] Preferably, the fixed cylinder includes: a cylinder body disposed on one side of the hydrogen fuel cell; a front end plate and a rear end plate coaxially disposed at both ends of the cylinder body; the front end plate is provided with a residual oxygen inlet connector, a residual hydrogen inlet connector, a first hot flow inlet port and a second hot flow inlet port; the rear end plate is provided with a dried residual oxygen outlet connector, a dried residual hydrogen outlet connector, a first hot flow outlet port and a second hot flow outlet port; and four pretreatment cylinders disposed circumferentially between the front end plate and the middle end plate of the cylinder body, the inner cavities of the four pretreatment cylinders respectively forming a first baffle channel, a second baffle channel, a first drainage channel and a second drainage channel.

[0015] Preferably, the fixing cylinder further includes an intermediate end plate disposed between the front end plate and the rear end plate, the intermediate end plate and the rear end plate forming the mounting cavity, and the intermediate end plate is provided with a residual oxygen connection port, a residual hydrogen connection port, a first heat flow connection port and a second heat flow connection port.

[0016] Preferably, a baffle tube is provided at the outer port of the first and second flow channels, and the baffle tube is connected to the heat outlet of the hydrogen fuel cell.

[0017] The advantages of this application compared to the prior art are:

[0018] This application pre-treats residual oxygen and hydrogen exhaust gas through a first and second baffle channel, which can initially collect and separate some of the liquid moisture, reducing the adsorption load on the subsequent desiccant. This achieves staged removal of moisture from the exhaust gas, improving overall dehydration efficiency. It also enables online regeneration of the desiccant, ensuring continuous and stable drying capacity. Furthermore, the heat flow from the hydrogen fuel cell is used to preheat the regeneration airflow, reducing system energy consumption. This improves the quality of exhaust gas recovery and the operating efficiency of the hydrogen fuel cell system. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a hydrogen fuel cell exhaust moisture removal device of the present invention installed on a hydrogen fuel cell.

[0020] Figure 2 This is a perspective view of a hydrogen fuel cell exhaust moisture removal device according to the present invention from a first perspective.

[0021] Figure 3 This is a perspective view of a hydrogen fuel cell exhaust moisture removal device according to the present invention from a second perspective.

[0022] Figure 4 This is a circumferential cross-sectional view of a hydrogen fuel cell exhaust moisture removal device according to the present invention, along the first and second deflection channels.

[0023] Figure 5 yes Figure 4 A magnified view of part A.

[0024] Figure 6 This is a circumferential cross-sectional view of a hydrogen fuel cell exhaust moisture removal device according to the present invention, along the first and second drainage channels.

[0025] Figure 7 yes Figure 6 A magnified view of section B.

[0026] Figure 8 This is a schematic diagram of the rotating disk in a hydrogen fuel cell exhaust moisture removal device according to the present invention.

[0027] Figure 9 This is a perspective view of the pretreatment cylinder in a hydrogen fuel cell exhaust moisture removal device according to the present invention.

[0028] Figure 10This is a schematic diagram of the flow fan, separator plate, and separator ring in a hydrogen fuel cell exhaust moisture removal device according to the present invention.

[0029] Figure 11 This is a schematic diagram of the separator and separator ring in a hydrogen fuel cell exhaust moisture removal device according to the present invention.

[0030] The diagram is labeled as follows: 1. Hydrogen fuel cell; 11. Residual oxygen connector; 12. Residual hydrogen connector; 2. Fixed cylinder; 211. First baffle channel; 2111. Water collection tank; 212. Second baffle channel; 213. First drainage channel; 214. Second drainage channel; 215. Dry residual oxygen outlet; 216. Dry residual hydrogen outlet; 217. First hot air channel; 218. Second hot air channel; 22. Drain pipe; 221. Collection pipe; 231. Separator ring; 232. Separator plate; 233. Rotating shaft; 234. Connecting mesh; 235. Scraper roller; 241. Cylinder body; 242. Front end plate; 2421. 2422 Residual oxygen inlet connector; 2423 Residual hydrogen inlet connector; 2424 First hot flow inlet port; 2425 Second hot flow inlet port; 243 Rear end plate; 244 Pretreatment cylinder; 245 Intermediate end plate; 2451 Residual oxygen connection port; 2452 Residual hydrogen connection port; 2453 First hot flow connection port; 2454 Second hot flow connection port; 3. Drainage fan; 31 Drainage shaft; 311 Blade; 4. Rotating disk; 41. Desiccant; 5. Rotary drive assembly; 51. Motor; 52. Main shaft; 53. Transmission sleeve; 54. Electromagnet; 55. Sliding sleeve; 56. Elastic element; 6. Baffle tube. Detailed Implementation

[0031] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1-3As shown, a hydrogen fuel cell exhaust moisture removal device is used to connect the residual oxygen connector 11 and the residual hydrogen connector 12 of the hydrogen fuel cell 1, and to remove moisture from the residual oxygen and residual hydrogen respectively. It includes: a fixed cylinder 2, with a coaxially arranged mounting cavity inside, and a first baffle channel 211, a second baffle channel 212, a first diversion channel 213, and a second diversion channel 214 circumferentially distributed around the axis of the fixed cylinder 2, each channel communicating with the mounting cavity; wherein, the first baffle channel 211 communicates with the residual oxygen connector 11, the second baffle channel 212 communicates with the residual hydrogen connector 12, and both the first diversion channel 213 and the second diversion channel 214 are provided with diversion fans 3; the outer ports of the first diversion channel 213 and the second diversion channel 214 are used for heat exchange with the heat output from the hydrogen fuel cell 1; a dry residual oxygen outlet 215, a dry residual hydrogen outlet 216, a first hot air channel 217, and a second hot air channel 218 are provided at one end of the fixed cylinder 2; The residual oxygen outlet 215 is coaxially aligned with the first baffle channel 211, the residual hydrogen outlet 216 is coaxially aligned with the second baffle channel 212, the first hot air channel 217 is coaxially aligned with the first drainage channel 213, and the second hot air channel 218 is coaxially aligned with the second drainage channel 214. A rotating disk 4 is coaxially rotatably disposed in the mounting cavity. The rotating disk 4 has four independent drying chambers arranged circumferentially inside, each filled with desiccant 41. A rotation drive assembly 5 is disposed on the fixed cylinder 2 and is used to drive the rotating disk 4 to rotate periodically by a predetermined angle. When the rotating disk 4 is at a certain working angle, the first drying chamber connects the first baffle channel 211 with the residual oxygen outlet 215, the second drying chamber connects the second baffle channel 212 with the residual hydrogen outlet 216, the third drying chamber connects the first drainage channel 213 with the first hot air channel 217, and the fourth drying chamber connects the second drainage channel 214 with the second hot air channel 218.

[0033] The heat flow is the refrigerant used to cool the hydrogen fuel cell 1. After cooling the hydrogen fuel cell 1, the refrigerant forms a heat flow, and the heat of the heat flow is used to regenerate the desiccant.

[0034] The desiccant is preferably an inert hygroscopic material that does not significantly adsorb hydrogen and oxygen, such as zeolite molecular sieve, activated alumina, silica gel, etc.

[0035] The device features two automatic switching modes for the rotating disk 4 to ensure continuous and efficient drying: 1. On-demand switching (humidity control mode): Humidity sensors built into each drying chamber continuously monitor the humidity level of the desiccant. When the humidity reaches a preset threshold, the system determines that the desiccant is approaching saturation and automatically initiates the switching procedure. This involves rotating disk 4 to remove the saturated drying chamber from the working area for regeneration, while simultaneously putting the regenerated drying chamber into the workflow. 2. Periodic switching (time control mode): As a backup or preventative strategy, the system can also automatically switch the rotating disk 4 at preset time intervals. The two modes can work independently or collaboratively to ensure the automation and intelligence of the drying process.

[0036] The first hot air channel 217 and the second hot air channel 218 are connected to the inlet of the first baffle channel 211 through pipelines, so that the water vapor regenerated and desorbed in the drying chamber passes through the first baffle channel 211 again. The first baffle channel 211 collects the water vapor and passes through the drying chamber again, preventing the water vapor from being discharged again and forming water mist.

[0037] The first flow channel 213 and the second flow channel 214 are also equipped with heating wires and other heating devices to further heat the gas entering the first flow channel 213 and the second flow channel 214, ensuring that the hot air can reach the regeneration temperature of the desiccant 41.

[0038] This device is used to connect the residual oxygen connector 11 and the residual hydrogen connector 12 of the hydrogen fuel cell 1, and to remove moisture from the residual oxygen tail gas and the residual hydrogen tail gas, respectively. The device mainly includes a fixed cylinder 2, a rotating disk 4, and a rotation drive assembly 5.

[0039] The fixed cylinder 2 has a coaxially arranged mounting cavity inside, and a first baffle channel 211, a second baffle channel 212, a first drainage channel 213, and a second drainage channel 214 distributed around the axis of the fixed cylinder 2. Each channel is connected to the mounting cavity. The first baffle channel 211 is connected to the residual oxygen connector 11 and is used to deflect the residual oxygen tail gas; the second baffle channel 212 is connected to the residual hydrogen connector 12 and is used to deflect the residual hydrogen tail gas. Through the deflection effect, some liquid water in the tail gas can be initially collected and separated. Both the first drainage channel 213 and the second drainage channel 214 are equipped with drainage fans 3, the outer ports of which are used for heat exchange with the heat flow output from the hydrogen fuel cell 1. One end of the fixed cylinder 2 is provided with a dried residual oxygen outlet 215, a dried residual hydrogen outlet 216, a first hot air channel 217, and a second hot air channel 218. The dry residual oxygen outlet 215 is coaxially aligned with the first baffle channel 211, the dry residual hydrogen outlet 216 is coaxially aligned with the second baffle channel 212, the first hot air channel 217 is coaxially aligned with the first drainage channel 213, and the second hot air channel 218 is coaxially aligned with the second drainage channel 214. Heating devices are also provided in the first drainage channel 213 and the second drainage channel 214.

[0040] The rotating disk 4 is coaxially rotatably disposed in the mounting cavity, and its interior has four independent drying chambers along the circumference, each of which is filled with desiccant 41.

[0041] The rotary drive assembly 5 is mounted on the fixed cylinder 2 and is used to drive the rotating disk 4 to rotate periodically by a predetermined angle.

[0042] When the rotating disk 4 is at a certain working angle, the four drying chambers are respectively connected to the first baffle channel 211 and the drying residual oxygen outlet 215, the second baffle channel 212 and the drying residual hydrogen outlet 216, the first diversion channel 213 and the first hot air channel 217, and the second diversion channel 214 and the second hot air channel 218.

[0043] Residual oxygen exhaust gas from hydrogen fuel cell 1 enters the first baffle channel 211 via residual oxygen connector 11, and residual hydrogen exhaust gas enters the second baffle channel 212 via residual hydrogen connector 12. As the exhaust gas flows through the baffle channels, gas-liquid separation occurs due to the baffle effect, and some liquid moisture is initially collected and separated. The exhaust gas, after baffle pretreatment, then passes through the currently connected drying chambers, where residual moisture is adsorbed by desiccant 41. The dried residual oxygen and residual hydrogen are discharged through the dried residual oxygen outlet 215 and dried residual hydrogen outlet 216, respectively. Simultaneously, external gas enters the first and second drainage channels 213 and 214 via the flow fan 3, exchanges heat with the hot air, and is further heated by the heating device, forming a hot regeneration airflow. The hot air flows through another set of drying chambers, regenerating and desorbing the desiccant 41 to restore its drying capacity, and then is discharged through the hot air channel. The rotary drive assembly 5 periodically drives the rotating disk 4 to rotate, switching the working state of each drying chamber to achieve continuous alternation of adsorption and regeneration processes.

[0044] like Figure 9 As shown, the bottom of the first baffle channel 211 and the second baffle channel 212 are both provided with a water collection tank 2111 extending along its length direction. The fixed cylinder 2 is provided with a drain pipe 22 that communicates with the outside. The drain pipe 22 is provided with a collection pipe 221 that communicates with the bottom of the water collection tank 2111.

[0045] As the exhaust gas flows through the baffle channel, gas-liquid separation occurs due to the baffle effect. Some liquid moisture is separated and collected in the water collection tank 2111, and then discharged to the outside of the device through the collection pipe 221 and the drain pipe 22. The exhaust gas, after baffle pretreatment, then passes through the drying chamber, where the moisture is adsorbed by the desiccant 41. At the same time, external gas enters the drainage channel through the drainage fan 3, exchanges heat with the heat flow, and is heated by the heating device to form a heat regeneration airflow, which regenerates and desorbs the desiccant 41.

[0046] The separated liquid water can be effectively collected and discharged through the water collection tank 2111 at the bottom of the baffle channel and the collection pipe 221 and drain pipe 22 connected to it, preventing liquid from accumulating in the device. This achieves staged removal of moisture from the exhaust gas, improving the overall dehydration efficiency and ensuring stable system operation.

[0047] like Figure 9 , Figure 10 and Figure 11 As shown, the first deflector channel 211 and the second deflector channel 212 are provided with partition plates 232 arranged at equal intervals along their length direction, and a partition ring 231 is provided between adjacent partition plates 232.

[0048] As the exhaust gas flows through the baffle channel, it is obstructed by the separator 232 and the separator ring 231, forming multiple baffles to enhance the gas-liquid separation effect. Some liquid moisture is separated and collected in the water collection tank 2111, and then discharged to the outside of the device through the collection pipe 221 and the drain pipe 22. The exhaust gas, after baffle pretreatment, then passes through the drying chamber, where the moisture is adsorbed by the desiccant 41. At the same time, external gas enters the drainage channel through the drainage fan 3, exchanges heat with the heat flow, and is heated by the heating device to form a hot regeneration airflow, which regenerates and desorbs the desiccant 41.

[0049] By setting a separator 232 and a separator ring 231 in the baffle channel, the baffle effect of the exhaust gas is enhanced, and the gas-liquid separation efficiency is improved.

[0050] like Figure 4 , Figure 5 , Figure 9 , Figure 10 and Figure 11 As shown, the separator ring 231 and the separator plate 232 are coaxially rotatably arranged in the first deflector channel 211 and the second deflector channel 212. The first deflector channel 211 and the second deflector channel 212 are also provided with a rotating shaft 233 coaxial with them. The rotating shaft 233 passes through the separator plate 232 and is fixedly connected to the separator plate 232. One end of the rotating shaft 233 extends to the outside of the fixed cylinder 2 and is connected to the rotation drive assembly 5. A connecting net 234 distributed circumferentially is provided between each separator ring 231 and the adjacent separator plate 232.

[0051] As the exhaust gas flows through the baffle channel, the rotary drive assembly 5 drives the rotating shaft 233 to rotate, causing the separator 232, separator ring 231, and connecting mesh 234 to rotate synchronously. As the connecting mesh 234 rotates, it captures moisture in the airflow passing between the separator 232 and separator ring 231. Simultaneously, under centrifugal force, the moisture is thrown towards the inner wall of the baffle channel and collects in the water collection tank 2111, then discharged outside the device through the collection pipe 221 and drain pipe 22. The exhaust gas, after baffle pretreatment, then passes through the drying chamber, where the moisture is adsorbed by the desiccant 41. The rotating connecting mesh 234 structure enhances the ability to capture moisture in the airflow, improving gas-liquid separation efficiency. Centrifugal force causes moisture to accumulate on the inner wall of the channel, facilitating collection and discharge.

[0052] like Figure 9 , Figure 10 and Figure 11 As shown, the outer edge of the partition ring 231 is provided with a circumferentially distributed groove, which extends radially along the partition ring 231. The inner walls of the first deflector channel 211 and the second deflector channel 212 are provided with scraper rollers 235 distributed circumferentially. The scraper rollers 235 are provided with an annular groove coaxial with themselves, and the annular groove slides in conjunction with the groove.

[0053] When the separator ring 231 rotates, the sliding engagement between the slide groove and the ring groove drives the scraper roller 235 to rotate. The scraper roller 235 scrapes the water condensed on the inner wall of the baffle channel into the water collection tank 2111, and discharges it to the outside of the device through the collection pipe 221 and the drain pipe 22. The exhaust gas after the baffle pretreatment then passes through the drying chamber, where the moisture is adsorbed by the desiccant 41.

[0054] like Figure 6 , Figure 9 , Figure 10 and Figure 11 As shown, the drainage fan 3 includes: a drainage shaft 31, which is coaxially and rotatably disposed in the first drainage channel 213 and the second drainage channel 214, and blades 311 are disposed on the circumferential surface of the drainage shaft 31; the rotary drive assembly 5 includes a motor 51 and a main shaft 52, the motor 51 is disposed at one end of the fixed cylinder 2, the main shaft 52 is rotatably disposed in the fixed cylinder 2, the ends of the drainage shaft 31 and the rotating shaft 233 are connected to one end of the main shaft 52 for transmission, and the other end of the main shaft 52 is connected to the motor 51 for transmission.

[0055] Motor 51 synchronously drives rotating shaft 233 and guide shaft 31 to rotate via main shaft 52. Rotating shaft 233 drives separator 232, separator ring 231, and connecting mesh 234 to rotate. Connecting mesh 234 captures moisture in the airflow, and under centrifugal force, the moisture is thrown towards the inner wall of the baffle channel. Separator ring 231 drives scraper roller 235 to rotate through the cooperation of sliding groove and ring groove. Scraper roller 235 scrapes condensate into water collection tank 2111. At the same time, guide shaft 31 drives blades 311 to rotate, generating airflow that enters the guide channel. After heat exchange with the heat flow, it is heated by the heating device to form a hot regeneration airflow. The exhaust gas after baffle pretreatment passes through the drying chamber, where moisture is adsorbed by desiccant 41. The hot regeneration airflow regenerates and desorbs the desiccant 41 in another set of drying chambers.

[0056] like Figure 6 and Figure 7 As shown, the rotary drive assembly 5 also includes: a transmission sleeve 53, coaxially fixedly mounted on the main shaft 52; an electromagnet 54, mounted inside the fixed cylinder 2, with the working end of the electromagnet 54 facing the rotating disk 4; a sliding sleeve 55, coaxially slidably mounted in the rotating disk 4 and splinedly connected to the rotating disk 4, with one end of the sliding sleeve 55 having an abutment ring for abutting against the transmission sleeve 53, and the other end having a limit ring; and an elastic element 56, sleeved on the sliding sleeve 55, with both ends of the elastic element 56 acting on the inner wall of the rotating disk 4 and the limit ring, respectively. When the electromagnet 54 is activated, the abutment ring coaxially abuts against the transmission sleeve 53 to transmit torque.

[0057] The rotary drive assembly 5 includes a motor 51, a main shaft 52, a transmission sleeve 53, an electromagnet 54, a sliding sleeve 55, and an elastic element 56. The motor 51 is located at one end of the fixed cylinder 2, and the main shaft 52 is rotatably mounted within the fixed cylinder 2. The ends of the guide shaft 31 and the rotating shaft 233 are drive-connected to one end of the main shaft 52, and the other end of the main shaft 52 is drive-connected to the motor 51. The transmission sleeve 53 is coaxially and fixedly mounted on the main shaft 52. The electromagnet 54 is located inside the fixed cylinder 2, with its working end facing the rotating disk 4. The sliding sleeve 55 is coaxially and slidably mounted within the rotating disk 4 and splinedly connected to it. One end of the sliding sleeve 55 has an abutment ring for contacting the transmission sleeve 53, and the other end has a limit ring. The elastic element 56 is sleeved on the sliding sleeve 55, and its two ends act on the inner wall of the rotating disk 4 and the limit ring, respectively.

[0058] When it is necessary to switch the working state of the drying chamber, the electromagnet 54 is activated. The electromagnet 54 attracts the sliding sleeve 55 to move axially, so that the abutment ring is coaxially abutted against the transmission sleeve 53 to transmit torque and drive the rotating disk 4 to rotate a predetermined angle. After the electromagnet 54 is de-energized, the sliding sleeve 55 is reset under the action of the elastic element 56 and disengages from the transmission sleeve 53.

[0059] The sliding sleeve 55 structure controlled by electromagnet 54 enables on-demand drive of the rotating disk 4, reducing system energy consumption. The spline connection ensures reliable torque transmission.

[0060] like Figure 4 and Figure 8 As shown, the fixed cylinder 2 includes: a cylinder body 241, which is disposed on one side of the hydrogen fuel cell 1; a front end plate 242 and a rear end plate 243, which are coaxially disposed at both ends of the cylinder body 241. The front end plate 242 is provided with a residual oxygen inlet connector 2421, a residual hydrogen inlet connector 2422, a first hot flow inlet port 2423 and a second hot flow inlet port 2424. The rear end plate 243 is provided with a dried residual oxygen outlet connector, a dried residual hydrogen outlet connector, a first hot flow outlet port and a second hot flow outlet port; and four pretreatment cylinders 244, which are disposed circumferentially between the front end plate 242 and the middle end plate 245 along the cylinder body 241. The inner cavities of the four pretreatment cylinders 244 respectively form a first baffle channel 211, a second baffle channel 212, a first drainage channel 213 and a second drainage channel 214.

[0061] The rotating disk 4 is coaxially rotatably disposed within the mounting cavity of the cylinder 241. Its interior has four independent drying chambers arranged circumferentially, each filled with desiccant 41. Filter screens are installed at both ends of the drying chambers to prevent desiccant 41 particles from entering the channel.

[0062] The fixed cylinder 2 includes a cylinder body 241, a front end plate 242, a rear end plate 243, and four pretreatment cylinders 244. The cylinder body 241 is disposed on one side of the hydrogen fuel cell 1. The front end plate 242 and the rear end plate 243 are coaxially disposed at both ends of the cylinder body 241. The front end plate 242 is provided with a residual oxygen inlet connector 2421, a residual hydrogen inlet connector 2422, a first heat flow inlet port 2423, and a second heat flow inlet port 2424, which are used to connect to the residual oxygen outlet, the residual hydrogen outlet, and an external heat source of the hydrogen fuel cell 1, respectively. The rear end plate 243 is provided with a dried residual oxygen outlet connector, a dried residual hydrogen outlet connector, a first heat flow outlet port, and a second heat flow outlet port, which are used to discharge the dried gas and the regenerated heat flow, respectively.

[0063] Four pretreatment cylinders 244 are evenly distributed circumferentially along the cylinder body 241, positioned between the front end plate 242 and the rear end plate 243. The inner cavities of the four pretreatment cylinders 244 respectively form a first baffle channel 211, a second baffle channel 212, a first guide channel 213, and a second guide channel 214. The first baffle channel 211 is connected to the residual oxygen outlet of the hydrogen fuel cell 1 via a residual oxygen inlet connector 2421, and the second baffle channel 212 is connected to the residual hydrogen outlet of the hydrogen fuel cell 1 via a residual hydrogen inlet connector 2422, for baffle pretreatment of the exhaust gas. The first guide channel 213 is connected to an external heat source via a first hot air inlet interface 2423, and the second guide channel 214 is connected to an external heat source via a second hot air inlet interface 2424, for introducing regenerative hot air.

[0064] Each pretreatment cylinder 244 is sealed to the front and rear end plates 243 to ensure airtightness. The cylinder body 241 has an internal mounting cavity to accommodate the rotating disk 4. The front end plate 242 and rear end plate 243 also have interfaces communicating with the mounting cavity for connecting to the drying chamber on the rotating disk 4.

[0065] like Figure 8 As shown, the fixed cylinder 2 also includes an intermediate end plate 245 disposed between the front end plate 242 and the rear end plate 243. The intermediate end plate 245 and the rear end plate 243 form the mounting cavity. The intermediate end plate 245 is provided with a residual oxygen connection port 2451, a residual hydrogen connection port 2452, a first heat flow connection port 2453 and a second heat flow connection port 2454.

[0066] The fixed cylinder 2 includes a cylinder body 241, a front end plate 242, a rear end plate 243, a middle end plate 245, and four pretreatment cylinders 244. The cylinder body 241 is disposed on one side of the hydrogen fuel cell 1. The front end plate 242, the middle end plate 245, and the rear end plate 243 are coaxially disposed at both ends of the cylinder body 241. The front end plate 242 is provided with a residual oxygen inlet connector 2421, a residual hydrogen inlet connector 2422, a first heat flow inlet port 2423, and a second heat flow inlet port 2424, which are used to connect to the residual oxygen outlet, the residual hydrogen outlet, and an external heat source of the hydrogen fuel cell 1, respectively. The rear end plate 243 is provided with a dried residual oxygen outlet connector, a dried residual hydrogen outlet connector, a first heat flow outlet port, and a second heat flow outlet port. The middle end plate 245 is disposed between the front end plate 242 and the rear end plate 243, forming an installation cavity between the middle end plate 245 and the rear end plate 243 to accommodate the rotating disk 4. The intermediate end plate 245 is provided with a residual oxygen connection port 2451, a residual hydrogen connection port 2452, a first heat flow connection port 2453, and a second heat flow connection port 2454.

[0067] Four pretreatment cylinders 244 are evenly distributed circumferentially along the cylinder body 241, positioned between the front end plate 242 and the middle end plate 245. The inner cavities of the four pretreatment cylinders 244 respectively form a first baffle channel 211, a second baffle channel 212, a first drainage channel 213, and a second drainage channel 214. Specifically, the first baffle channel 211 is connected to the residual oxygen connection port 2451 via a residual oxygen inlet connector 2421, and the second baffle channel 212 is connected to the residual hydrogen connection port 2452 via a residual hydrogen inlet connector 2422. The first drainage channel 213 is connected to the first hot flow connection port 2453 via a first hot flow inlet interface 2423, and the second drainage channel 214 is connected to the second hot flow connection port 2454 via a second hot flow inlet interface 2424.

[0068] like Figure 2 As shown, a baffle tube 6 is provided at the outer port of the first flow channel 213 and the second flow channel 214, and the baffle tube 6 is connected to the heat outlet of the hydrogen fuel cell 1.

[0069] A baffle tube 6 is provided at the outer port of the first flow channel 213 and the second flow channel 214, and the baffle tube 6 is connected to the hot flow outlet of the hydrogen fuel cell 1. The baffle tube 6 adopts a serpentine coil structure, and its inner cavity forms a closed loop with the outer port of the flow channel. The outer wall of the baffle tube 6 is provided with heat dissipation fins, which are spirally distributed along the axial direction of the baffle tube 6. The inlet end of the baffle tube 6 is connected to the hot flow outlet of the hydrogen fuel cell 1 through a quick connector, and the outlet end is connected to an external cooling circuit.

[0070] A heat exchange interface is formed between the outer wall of the baffle tube 6 and the flow channel, enabling heat transfer between the heat flow and the airflow within the flow channel. The heat dissipation fins increase the heat exchange area and improve heat conduction efficiency. The serpentine structure of the baffle tube 6 extends the heat flow path and increases the heat exchange time.

[0071] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A hydrogen fuel cell off-gas water removal device for connecting an excess oxygen port (11) and an excess hydrogen port (12) of a hydrogen fuel cell (1) and removing water from the excess oxygen and the excess hydrogen, respectively, characterized by, The application relates to a hydrogen fuel cell drying device. The device comprises a fixed cylinder (2) internally provided with coaxially arranged mounting cavities, a first baffle passage (211), a second baffle passage (212), a first flow guide passage (213) and a second flow guide passage (214) which are distributed in the circumferential direction of the axis of the fixed cylinder (2) and are respectively connected with the mounting cavities; wherein the first baffle passage (211) is connected with the residual oxygen joint (11), the second baffle passage (212) is connected with the residual hydrogen joint (12), the first flow guide passage (213) and the second flow guide passage (214) are both provided with flow guide fans (3), the outer ports of the first flow guide passage (213) and the second flow guide passage (214) are used for heat exchange with the hot flow output by a hydrogen fuel cell (1); a drying residual oxygen discharge port (215), a drying residual hydrogen discharge port (216), a first hot air passage (217) and a second hot air passage (218) are arranged at one end of the fixed cylinder (2); the drying residual oxygen discharge port (215) is coaxially corresponding to the first baffle passage (211), the drying residual hydrogen discharge port (216) is coaxially corresponding to the second baffle passage (212), the first hot air passage (217) is coaxially corresponding to the first flow guide passage (213), and the second hot air passage (218) is coaxially corresponding to the second flow guide passage (214); A rotating disc (4) is coaxially arranged in the mounting cavities and is internally provided with four independent drying cavities along the circumferential direction of the rotating disc (4), and the drying cavities are filled with drying agents (41); A rotating driving assembly (5) is arranged on the fixed cylinder (2) and is used for driving the rotating disc (4) to periodically rotate by a predetermined angle; When the rotating disc (4) is at a certain working angle, the first drying cavity connects the first baffle passage (211) with the drying residual oxygen discharge port (215), the second drying cavity connects the second baffle passage (212) with the drying residual hydrogen discharge port (216), the third drying cavity connects the first flow guide passage (213) with the first hot air passage (217), and the fourth drying cavity connects the second flow guide passage (214) with the second hot air passage (218); the bottom of the first baffle passage (211) and the second baffle passage (212) is provided with a water collecting groove (2111) which extends along the length direction of the first baffle passage (211) and the second baffle passage (212); a drain pipe (22) which is connected with the outside is arranged in the fixed cylinder (2), and a collecting pipe (221) which is connected with the bottom of the water collecting groove (2111) is arranged on the drain pipe (22). The first baffle channel (211) and the second baffle channel (212) are provided with a partition sheet (232) arranged along the length direction at equal intervals, and a partition ring (231) is arranged between adjacent partition sheets (232); the partition ring (231) and the partition sheet (232) are coaxially arranged in the first baffle channel (211) and the second baffle channel (212), and a rotating shaft (233) coaxial with the first baffle channel (211) and the second baffle channel (212) is arranged in the first baffle channel (211) and the second baffle channel (212); the rotating shaft (233) penetrates the partition sheet (232) and is fixedly connected with the partition sheet (232); one end of the rotating shaft (233) extends to the outside of the fixed cylinder (2) and is in transmission connection with the rotary drive assembly (5); and a connecting net (234) is arranged between each partition ring (231) and the adjacent partition sheet (232) and is distributed along the circumferential direction of the partition ring (231).

2. The water removal device for hydrogen fuel cell exhaust gas according to claim 1, characterized by The outer edge of the partition ring (231) is provided with a sliding groove distributed along the circumferential direction of the partition ring (231), and the inner wall of the first baffle channel (211) and the second baffle channel (212) is provided with a scraping roller (235) distributed along the circumferential direction; the scraping roller (235) is provided with a ring groove coaxial with the scraping roller (235), and the ring groove is in sliding connection with the sliding groove.

3. The water removal device for hydrogen fuel cell exhaust gas according to claim 1, characterized by The drainage fan (3) comprises: a drainage shaft (31) coaxially arranged in the first drainage channel (213) and the second drainage channel (214), and a blade (311) arranged on the circumferential surface of the drainage shaft (31); the rotary drive assembly (5) comprises a motor (51) and a main shaft (52); the motor (51) is arranged at one end of the fixed cylinder (2); the main shaft (52) is rotatably arranged in the fixed cylinder (2); one end of the drainage shaft (31) and the end of the rotating shaft (233) are in transmission connection with one end of the main shaft (52); and the other end of the main shaft (52) is in transmission connection with the motor (51).

4. The water removal device for hydrogen fuel cell exhaust gas according to claim 3, characterized by The rotary drive assembly (5) further comprises: a transmission sleeve (53) coaxially fixedly arranged on the main shaft (52); an electromagnet (54) arranged in the fixed cylinder (2), wherein the working end of the electromagnet (54) faces the rotating disc (4); a sliding sleeve (55) coaxially and slidably arranged in the rotating disc (4) and in spline connection with the rotating disc (4); one end of the sliding sleeve (55) is provided with an abutting ring for abutting against the transmission sleeve (53), and the other end is provided with a limiting ring; a resilient element (56) sleeved on the sliding sleeve (55), wherein the two ends of the resilient element (56) act on the inner wall of the rotating disc (4) and the limiting ring, respectively; when the electromagnet (54) is started, the abutting ring is coaxially abutted on the transmission sleeve (53) to transmit the torque.

5. The water removal device for hydrogen fuel cell exhaust gas according to claim 1, characterized by The fixed cylinder (2) comprises: a cylinder body (241) arranged on one side of the hydrogen fuel cell (1); A front end plate (242) and a rear end plate (243) are coaxially arranged at two ends of the cylinder body (241), the front end plate (242) is provided with a residual oxygen inlet joint (2421), a residual hydrogen inlet joint (2422), a first hot stream inlet interface (2423) and a second hot stream inlet interface (2424), and the rear end plate (243) is provided with a drying residual oxygen outlet joint, a drying residual hydrogen outlet joint, a first hot stream outlet interface and a second hot stream outlet interface; Four pretreatment cylinders (244) are arranged between the front end plate (242) and an intermediate end plate (245) along the circumference of the cylinder body (241), and the inner cavities of the four pretreatment cylinders (244) form the first baffle passage (211), the second baffle passage (212), the first flow guide passage (213) and the second flow guide passage (214) respectively.

6. A hydrogen fuel cell tail gas water removal device according to claim 5, wherein, The fixed cylinder (2) further comprises an intermediate end plate (245) arranged between the front end plate (242) and the rear end plate (243), the mounting cavity is formed between the intermediate end plate (245) and the rear end plate (243), and the intermediate end plate (245) is provided with a residual oxygen connecting port (2451), a residual hydrogen connecting port (2452), a first hot stream connecting port (2453) and a second hot stream connecting port (2454).

7. The water removal device for hydrogen fuel cell exhaust gas according to claim 1, characterized by A baffle pipe (6) is arranged at the outer port of the first flow guide passage (213) and the second flow guide passage (214), and the baffle pipe (6) is in communication with the hot stream outlet of the hydrogen fuel cell (1).

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