Exhaust treatment device of fuel cell system

Abstract

The invention relates to the field of battery exhaust purification, in particular to an exhaust treatment device of a fuel cell system, which comprises a fixed foundation plate and a reflux box detachably mounted on the top surface of the fixed foundation plate, a protective sleeve shell is detachably installed on the surface of the top of the fixed foundation plate and located on the edge of the top of the backflow box, the supporting frame is detachably installed on the inner side wall face of the protective sleeve shell, and a purification tank is fixedly connected to the inner side wall face of the supporting frame. When filtered gas in the purification tank is discharged into the first cavity through the exhaust plate, the gas is continuously accumulated in the first cavity, the gas enters the backflow box under the pushing of follow-up gas, and the flowing speed of the gas is increased by utilizing a narrow space at an inlet of the backflow box; and the gas quickly enters the backflow box, and the gas impacts the surface of the filtering arc-shaped plate.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery exhaust purification, and specifically relates to an exhaust treatment device for a fuel cell system. Background Art

[0002] Fuel cells are power supply sources widely used in the prior art. Fuel cells mainly convert chemical energy into electrical energy to supply power to electrical products. For fuel cells, the reaction raw materials are hydrogen and oxygen, the reaction site is the fuel cell stack, and the reaction product is water, which is environmentally friendly.

[0003] A patent with the publication number CN116404216A discloses an exhaust device for a marine fuel cell, which relates to the technical field of hydrogen fuel cells. The exhaust device includes a box body, an exhaust component and a detection component. The box body is provided with a first chamber and a second chamber for accommodating the fuel cell. The exhaust component includes a controller and a first exhaust machine and a second exhaust machine connected to the controller. The two exhaust machines are respectively communicated with the first chamber, the second chamber and the outside of the box body. The detection component includes a first detector and a second detector connected to the controller, which are respectively arranged in the first chamber and the second chamber. When the hydrogen concentration in the first chamber or the second chamber exceeds the standard, the controller controls the first exhaust machine or the second exhaust machine to work, and the hydrogen in the corresponding chamber is pumped out. There is no need to start the first exhaust machine and the second exhaust machine at the same time, thus greatly saving working energy.

[0004] In the current prior art, during the long-term use of existing batteries, relatively high temperatures will be generated inside the battery system and the battery pack. Generally, these can be removed by an exhaust machine by pumping out the internal hot air. However, the exhaust machine will cause the sealed space inside the battery pack to communicate with the outside world. As a result, when the exhaust fan stops running, the external water vapor will re-enter the battery pack through the exhaust machine, which may cause damage to the battery pack due to water vapor. If the exhaust outlet of the exhaust fan is closed, the internal hot air cannot be effectively discharged.

[0005] Therefore, the present invention provides an exhaust treatment device for a fuel cell system. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: An exhaust gas treatment device for a fuel cell system according to the present invention includes a fixed base plate and a reflux box detachably installed on the top surface of the fixed base plate. A protective sleeve is detachably installed on the top edge position of the fixed base plate and located on the top of the reflux box. A support frame is detachably installed on the inner side wall surface of the protective sleeve. A purification tank is fixedly connected to the inner side wall surface of the support frame. A multi-layer filter plate is fixedly connected to the inner side wall surface of the purification tank. An absorption air pipe is arranged on the outer surface of the multi-layer filter plate. A suction pump is fixedly installed on the inner side wall surface at the top end of the absorption air pipe. An elastic strip is fixedly connected to the inner side wall surface of the absorption air pipe. One end of the elastic strip is fixedly connected to a hanging rod. A closing plate that is movably lapped on the inner side wall surface of the absorption air pipe is fixedly connected to the bottom end of the hanging rod. A funnel sleeve that is movably sleeved on the inner side wall surface of the absorption air pipe is fixedly connected to the top end of the hanging rod.

[0008] Preferably, a limiting plate is fixedly connected to the inner side wall surface of the absorption air pipe. The outer surface of the limiting plate is movably sleeved on the outer surface of the funnel sleeve. A limiting strip is fixedly connected to the inner side wall surface at the bottom of the absorption air pipe.

[0009] Preferably, the top surface of the closing plate is movably lapped on the bottom surface of the limiting strip. An air bag is fixedly installed on the outer surface at the bottom of the closing plate. A lock is arranged on the bottom surface of the purification tank.

[0010] Preferably, the bottom surface of the air bag is movably lapped on the top surface of the lock. An exhaust plate is arranged on the top surface of the purification tank and located on the outer surface of the absorption air pipe.

[0011] Preferably, a first cavity and a second cavity are respectively formed inside the protective sleeve. The support frame is arranged on the inner side wall surface of the first cavity.

[0012] Preferably, one end of the absorption air pipe extends to the inner side wall surface of the second cavity. A cooling hollow plate is fixedly connected to the inner side wall surface of the second cavity.

[0013] Preferably, both ends of the cooling hollow plate extend to the outer surface of the protective sleeve. A spiral stirring rod is movably sleeved on the inner side wall surface of the second cavity and located at one side edge position of the cooling hollow plate.

[0014] Preferably, an inclined groove is arranged on the inner side wall surface at the bottom of the reflux box. A transmission rod is movably sleeved on the inner side wall surface of the reflux box. A transmission sector plate is fixedly installed on the outer surface of the transmission rod. The outer surface of the transmission sector plate is arranged at the edge position of the inlet of the reflux box.

[0015] Preferably, both ends of the transmission rod extend to the outer surface of the reflux tank. Two sets of transmission tracks are movably sleeved on the outer surface of the transmission rod, and the outer surface of the other set of transmission tracks is movably sleeved on the outer surface of the spiral stirring rod.

[0016] Preferably, a filtering arc plate is fixedly connected to the inner wall surface of the reflux tank. Three one-way reflux pipes are fixedly connected to the other surface of the reflux tank. The other ends of the two one-way reflux pipes extend to the inner wall surface of the second cavity, and one end of the other one-way reflux pipe is communicated with the external space.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. For the exhaust gas treatment device of a fuel cell system described in the present invention, when the filtered gas in the purification tank is discharged into the first cavity through the exhaust plate, the gas will continuously accumulate inside the first cavity. Under the push of the subsequent gas, the gas enters into the reflux tank. By using the narrow space at the inlet of the reflux tank, the flow rate of the gas is increased, so that the gas quickly enters into the reflux tank. The gas impacts on the surface of the filtering arc plate to filter some residual impurities. At the same time, the relatively fine mesh holes can adhere to some water vapor flowing with the gas, liquefy the water vapor, and drain and collect the liquefied gas through the inclined groove.

[0019] 2. For the exhaust gas treatment device of a fuel cell system described in the present invention, the filtered gas will re-enter into the second cavity through the one-way reflux pipe. At this time, the low-temperature gas will be mixed with the high-temperature hot gas newly entering into the second cavity, thereby reducing the temperature of the hot gas. The cooled gas will reduce the heat conduction load of the cooling hollow plate. Otherwise, if the temperature of the cooling hollow plate is too high, the heat conduction performance will be reduced, and the hot gas cannot be effectively cooled, resulting in too high temperature of the discharged gas, which will damage the internal and external structures of the battery pack, reduce the battery performance and service life, and also damage the surrounding electronic devices and energy storage systems, causing economic losses.

[0020] 3. The exhaust treatment device of a fuel cell system described in the present invention cooperates with an exhaust pump to absorb the hot air inside the battery, and injects the hot air into the interior of the purification tank through the absorption air pipe. At this time, the funnel sleeve is cooperated with to increase the contact range with the hot air, and the air holes on the outer surface of the bottom of the funnel sleeve are cooperated to discharge the collected hot air. The difference between the input amount of the hot gas and the discharge amount is used to push the funnel sleeve and the sinking rod, so that the closing plate on the bottom surface of the sinking rod is separated from the bottom end of the absorption air pipe, so that the hot gas inside the absorption air pipe is quickly discharged into the purification tank. When the exhaust pump stops absorbing the hot air, the funnel sleeve has no driving force, and under the pullback of the elastic strip, the closing plate is closed to the bottom surface of the absorption air pipe again to achieve the effect of sealing treatment;

[0021] 4. The exhaust treatment device of a fuel cell system described in the present invention cooperates with an exhaust pump to absorb the hot air inside the battery pack and infuse it into the second cavity. At the same time, it cooperates with multiple groups of cooling hollow plates inside the second cavity to contact the incoming hot air, and utilizes the metal properties of the cooling hollow plates to absorb the heat of the flowing hot air. At the same time, it cooperates with the circulation between the two ends of the cooling hollow plates and the external space to quickly dissipate the hot air accumulated inside the cooling hollow plates, thereby achieving the effect of quickly cooling the cooling hollow plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 is a stereogram of the present invention;

[0024] Figure 2 is a cutaway stereoscopic view of the protective sleeve of the present invention;

[0025] Figure 3 is a cutaway perspective view of a return box in the present invention;

[0026] Figure 4 It is a three-dimensional diagram of the purification tank in the present invention;

[0027] Figure 5 It is a cutaway perspective view of the purification tank in the present invention;

[0028] Figure 6 It is a partial cutaway stereoscopic view of the purification tank in the present invention;

[0029] Figure 7 It is an extended cross-sectional stereoscopic view of the purification tank in the present invention.

[0030] In the figure: 11, fixed foundation plate; 12, protective housing; 121, first cavity; 122, second cavity; 123, cooling hollow plate; 124, spiral stirring rod; 13, return box; 131, chute; 132, filtering arc plate; 133, transmission rod; 134, transmission sector plate; 135, transmission track; 136, one-way return pipe; 14, support frame; 141, purification tank; 142, exhaust plate; 143, absorption air pipe; 144, air extraction pump; 145, multi-layer filter plate; 146, limiting plate; 147, funnel sleeve; 148, falling rod; 149, closing plate; 1410, limiting strip; 1411, airbag; 1412, elastic strip; 1413, lock. Detailed implementation manner

[0031] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0032] As Figure 1 - Figure 2 and Figures 4 to 7 shown, an exhaust gas treatment device for a fuel cell system according to an embodiment of the present invention includes a fixed foundation plate 11 and a return box 13 detachably installed on the top surface of the fixed foundation plate 11. A protective housing 12 is detachably installed on the top edge position of the fixed foundation plate 11 and located on the top of the return box 13. A support frame 14 is detachably installed on the inner wall surface of the protective housing 12. A purification tank 141 is fixedly connected to the inner wall surface of the support frame 14. A multi-layer filter plate 145 is fixedly connected to the inner wall surface of the purification tank 141. An absorption air pipe 143 is arranged on the outer surface of the multi-layer filter plate 145. An air extraction pump 144 is fixedly installed on the inner wall surface of the top end of the absorption air pipe 143. An elastic strip 1412 is fixedly connected to the inner wall surface of the absorption air pipe 143. One end of the elastic strip 1412 is fixedly connected to a falling rod 148. The bottom end of the falling rod 148 is fixedly connected to a closing plate 149 that is movably lapped on the inner wall surface of the absorption air pipe 143. The top end of the falling rod 148 is fixedly connected to a funnel sleeve 147 that is movably sleeved on the inner wall surface of the absorption air pipe 143.

[0033] Cooperate with the vacuum pump 144 to absorb the hot air inside the battery, and inject the hot air into the interior of the purification tank 141 through the absorption air pipe 143. At this time, cooperate with the funnel sleeve 147 to increase the contact range with the hot air, and cooperate with the air holes on the outer surface of the bottom of the funnel sleeve 147 to discharge the collected hot air. By utilizing the difference between the input amount of hot air and the discharge amount, the funnel sleeve 147 and the sinking rod 148 are pushed, so that the closing plate 149 on the bottom surface of the sinking rod 148 is separated from the bottom end of the absorption air pipe 143, so that the hot air inside the absorption air pipe 143 is quickly discharged into the purification tank 141. When the vacuum pump 144 stops absorbing hot air, the funnel sleeve 147 has no driving force. Under the pullback of the elastic strip 1412, the closing plate 149 is closed to the bottom surface of the absorption air pipe 143 again to achieve the effect of sealing treatment;

[0034] When the hot air passes through the absorption air pipe 143 and is discharged into the purification tank 141, the hot air will spread and accumulate along the two sides of the absorption air pipe 143, pass through the multiple filter plates 145 layer by layer, and filter and settle with the material particles inside the purification tank 141, thereby purifying the hot air.

[0035] like Figures 4 to 7 As shown, a limiting plate 146 is fixedly connected to the inner wall of the absorption air pipe 143, and the outer surface of the limiting plate 146 is movably sleeved on the outer surface of the funnel sleeve 147. A limiting strip 1410 is fixedly connected to the bottom inner wall of the absorption air pipe 143, and the top surface of the closing plate 149 is movably overlapped on the bottom surface of the limiting strip 1410. An air bag 1411 is fixedly installed on the bottom outer surface of the closing plate 149, a lock buckle 1413 is arranged on the bottom surface of the purification tank 141, and the bottom surface of the air bag 1411 is movably overlapped on the top surface of the lock buckle 1413. An exhaust plate 142 is arranged on the top surface of the purification tank 141 and on the outer surface of the absorption air pipe 143.

[0036] When the vacuum pump 144 stops pumping air, the closing plate 149 will be pulled back by the elastic strip 1412 to close the closing plate 149 on the bottom surface of the limiting strip 1410. When the closing plate 149 rebounds, it cooperates with the buoyancy of the air bag 1411 to increase the driving force of the falling rod 148. When the falling rod 148 moves up and down, it cooperates with the limiting plate 146 to fit on the outer surface of the funnel sleeve 147, so that the funnel sleeve 147 can only move vertically up and down. The falling rod 148 will not be tilted, and the friction between the funnel sleeve 147 and the absorption air pipe 143 will not cause it to be unable to move effectively. It also avoids the situation that the tilted falling rod 148 will cause the closing plate 149 to be unable to be effectively connected to the interior of the absorption air pipe 143, causing the liquid inside the purification tank 141 to flow back into the interior of the absorption air pipe 143.

[0037] like Figures 1 to 2 As shown, the interior of the protective shell 12 is respectively provided with a first cavity 121 and a second cavity 122, the support frame 14 is arranged on the inner wall of the first cavity 121, one end of the absorption air pipe 143 extends to the inner wall of the second cavity 122, a cooling hollow plate 123 is fixedly connected to the inner wall of the second cavity 122, both ends of the cooling hollow plate 123 respectively extend to the outer surface of the protective shell 12, and a spiral stirring rod 124 is movably sleeved on the inner wall of the second cavity 122 and on one side edge of the cooling hollow plate 123.

[0038] In cooperation with the vacuum pump 144, the hot air inside the battery pack is absorbed and pumped into the second cavity 122. At the same time, the multiple groups of cooling hollow plates 123 inside the second cavity 122 are in contact with the incoming hot air. The metal properties of the cooling hollow plates 123 are used to absorb the heat of the flowing hot air. At the same time, the two ends of the cooling hollow plates 123 are connected to the external space to quickly dissipate the hot air accumulated inside the cooling hollow plates 123, thereby achieving the effect of quickly cooling the cooling hollow plates 123.

[0039] like Figures 1 to 3 As shown, an inclined groove 131 is provided on the inner wall surface of the bottom of the reflux box 13, a transmission rod 133 is movably sleeved on the inner wall surface of the reflux box 13, a transmission sector plate 134 is fixedly installed on the outer surface of the transmission rod 133, the outer surface of the transmission sector plate 134 is arranged at the edge position of the entrance of the reflux box 13, both ends of the transmission rod 133 extend to the outer surface of the reflux box 13, two groups of transmission crawlers 135 are movably sleeved on the outer surface of the transmission rod 133, the outer surface of another group of transmission crawlers 135 is movably sleeved on the outer surface of the spiral stirring rod 124, a filtering arc plate 132 is fixedly connected to the inner wall surface of the reflux box 13, three groups of one-way reflux pipes 136 are fixedly connected to the other side surface of the reflux box 13, the other ends of two groups of one-way reflux pipes 136 extend to the inner wall surface of the second cavity 122, and one end of another group of one-way reflux pipes 136 is connected to the external space.

[0040] When the filtered gas in the purification tank 141 is discharged into the first cavity 121 through the exhaust plate 142, the gas will be continuously accumulated in the first cavity 121. Under the push of the subsequent gas, the gas will enter the reflux box 13. The narrow space at the entrance of the reflux box 13 is used to increase the flow speed of the gas, so that the gas can quickly enter the reflux box 13. The gas will impact on the surface of the filter arc plate 132 to filter some residual impurities. At the same time, the finer mesh can adhere to some water vapor flowing with the gas, so that the water vapor is liquefied, and the liquefied gas is drained and collected through the chute 131.

[0041] When the gas impacts the surface of the filter arc plate 132, it drives the transmission sector plate 134 and the transmission rod 133 to rotate together, thereby driving the transmission track 135 on the outer surface of the transmission rod 133 to transmit, and drives the spiral stirring rod 124 on the outer surface of the transmission track 135 to rotate inside the second cavity 122, so that the hot gas and the subsequent cold air can be fully mixed together, thereby reducing the temperature of the gas;

[0042] The filtered gas will re-enter the second cavity 122 through the one-way reflux pipe 136. At this time, the low-temperature gas and the high-temperature hot air newly entering the second cavity 122 will be mixed, thereby reducing the temperature of the hot air. The cooled gas will reduce the thermal load of the cooling hollow plate 123, so that the thermal conductivity of the cooling hollow plate 123 is reduced due to excessive temperature, and the hot air cannot be effectively cooled, resulting in the exhaust temperature being too high, causing damage to the internal and external structures of the battery pack, reducing battery performance and service life, and damaging surrounding electronic equipment and energy storage systems, causing economic losses.

[0043] Working principle: cooperate with the vacuum pump 144 to absorb the hot air inside the battery pack and infuse it into the second cavity 122, and cooperate with the multiple groups of cooling hollow plates 123 inside the second cavity 122 to contact the incoming hot air, and use the metal properties of the cooling hollow plates 123 to absorb the heat of the flowing hot air. At the same time, cooperate with the circulation between the two ends of the cooling hollow plates 123 and the external space, so that the hot air accumulated inside the cooling hollow plates 123 can be quickly dissipated, and the cooling hollow plates 123 can be quickly cooled down.

[0044] Cooperate with the vacuum pump 144 to absorb the hot air inside the battery, and inject the hot air into the interior of the purification tank 141 through the absorption air pipe 143. At this time, cooperate with the funnel sleeve 147 to increase the contact range with the hot air, and cooperate with the air holes on the outer surface of the bottom of the funnel sleeve 147 to discharge the collected hot air. By utilizing the difference between the input amount of hot air and the discharge amount, the funnel sleeve 147 and the sinking rod 148 are pushed, so that the closing plate 149 on the bottom surface of the sinking rod 148 is separated from the bottom end of the absorption air pipe 143, so that the hot air inside the absorption air pipe 143 is quickly discharged into the purification tank 141. When the vacuum pump 144 stops absorbing hot air, the funnel sleeve 147 has no driving force. Under the pullback of the elastic strip 1412, the closing plate 149 is closed to the bottom surface of the absorption air pipe 143 again to achieve the effect of sealing treatment;

[0045] When the filtered gas inside the purification tank 141 is discharged into the first cavity 121 through the exhaust plate 142, the gas will continuously accumulate inside the first cavity 121. Under the push of the subsequent gas, the gas enters into the reflux box 13. By using the narrow space at the entrance of the reflux box 13, the flow velocity of the gas is increased, enabling the gas to quickly enter into the reflux box 13. The gas will impact on the surface of the filtering arc plate 132 to filter some residual impurities. At the same time, the relatively fine mesh holes can adhere to some water vapor flowing with the gas, liquefy the water vapor, and drain and collect the liquefied gas through the chute 131;

[0046] The filtered gas will re-enter into the second cavity 122 through the one-way reflux pipe 136. At this time, the low-temperature gas will be mixed with the high-temperature hot gas newly entering into the second cavity 122, thereby reducing the temperature of the hot gas. The cooled gas will reduce the heat conduction load of the cooling hollow plate 123. Otherwise, if the temperature is too high, the heat conduction performance of the cooling hollow plate 123 will decrease, the hot gas cannot be effectively cooled, resulting in too high temperature being discharged, damaging the internal and external structures of the battery pack, reducing the battery performance and service life, and also damaging the surrounding electronic devices and energy storage systems, causing economic losses.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An exhaust gas treatment device for a fuel cell system, comprising a fixed base plate (11) and a reflux box (13) detachably mounted on the top surface of the fixed base plate (11), a protective housing (12) detachably mounted on the top surface of the fixed base plate (11) and located at the top edge position of the reflux box (13), and a support frame (14) detachably mounted on the inner side wall surface of the protective housing (12), characterized in that: On the inner side wall surface of the support frame (14), a purification tank (141) is fixedly connected. On the inner side wall surface of the purification tank (141), a multi-layer filter plate (145) is fixedly connected. On the outer surface of the multi-layer filter plate (145), an absorption air pipe (143) is arranged. On the inner side wall surface at the top end of the absorption air pipe (143), an air extraction pump (144) is fixedly installed. On the inner side wall surface of the absorption air pipe (143), an elastic strip (1412) is fixedly connected. One end of the elastic strip (1412) is fixedly connected with a hanging rod (148). At the bottom end of the hanging rod (148), a closing plate (149) is fixedly connected and movably lapped on the inner side wall surface of the absorption air pipe (143). At the top end of the hanging rod (148), a funnel sleeve (147) is fixedly connected and movably sleeved on the inner side wall surface of the absorption air pipe (143).

2. The exhaust gas treatment device of a fuel cell system according to claim 1, characterized in that: On the inner side wall surface of the absorption air pipe (143), a limiting plate (146) is fixedly connected. The outer surface of the limiting plate (146) is movably sleeved on the outer surface of the funnel sleeve (147). On the inner side wall surface at the bottom of the absorption air pipe (143), a limiting strip (1410) is fixedly connected.

3. The exhaust gas treatment device of a fuel cell system according to claim 2, characterized in that: The top surface of the closing plate (149) is movably lapped on the bottom surface of the limiting strip (1410). On the outer surface at the bottom of the closing plate (149), an air bag (1411) is fixedly installed. On the bottom surface of the purification tank (141), a lock catch (1413) is arranged.

4. The exhaust gas treatment device of a fuel cell system according to claim 3, characterized in that: The bottom surface of the air bag (1411) is movably lapped on the top surface of the lock catch (1413). On the top surface of the purification tank (141) and on the outer surface of the absorption air pipe (143), an exhaust plate (142) is arranged.

5. An exhaust gas treatment device for a fuel cell system according to claim 1, characterized in that: Inside the protective housing (12), a first cavity (121) and a second cavity (122) are respectively formed. The position of the support frame (14) is on the inner side wall surface of the first cavity (121).

6. The exhaust gas treatment device of a fuel cell system according to claim 5, wherein: One end of the absorption air pipe (143) extends to the inner side wall surface of the second cavity (122). On the inner side wall surface of the second cavity (122), a cooling hollow plate (123) is fixedly connected.

7. The exhaust gas treatment device of a fuel cell system according to claim 6, characterized in that: Both ends of the cooling hollow plate (123) respectively extend to the outer surface of the protective housing (12). On the inner side wall surface of the second cavity (122) and at one side edge position of the cooling hollow plate (123), a spiral stirring rod (124) is movably sleeved.

8. An exhaust gas treatment device for a fuel cell system according to claim 1, characterized in that: On the inner side wall surface at the bottom of the reflux tank (13), an inclined groove (131) is arranged. On the inner side wall surface of the reflux tank (13), a transmission rod (133) is movably sleeved. On the outer surface of the transmission rod (133), a transmission sector plate (134) is fixedly installed. The outer surface of the transmission sector plate (134) is arranged at the edge position of the inlet of the reflux tank (13).

9. The exhaust gas treatment device of a fuel cell system according to claim 8, characterized in that: Both ends of the transmission rod (133) extend to the outer surface of the reflux tank (13), and two groups of transmission tracks (135) are movably sleeved on the outer surface of the transmission rod (133). The outer surface of the other group of transmission tracks (135) is movably sleeved on the outer surface of the spiral stirring rod (124).

10. The exhaust gas treatment device of a fuel cell system according to claim 9, characterized in that: A filtering arc plate (132) is fixedly connected to the inner wall surface of the reflux tank (13). Three one-way reflux pipes (136) are fixedly connected to the other surface of the reflux tank (13). The other ends of the two groups of one-way reflux pipes (136) extend to the inner wall surface of the second cavity (122), and one end of the other group of one-way reflux pipes (136) is communicated with the external space.

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