Tail gas treatment system of hydrogen energy power station

Abstract

The utility model discloses a tail gas treatment system of a hydrogen energy power station, which comprises a hydrogen removal device, an expansion machine connected with a gas outlet pipeline of the hydrogen removal device and a generator, and a rotor of the generator is fixedly connected with an output shaft of the expansion machine, so that tail gas of the hydrogen energy power station can be reused. And power is supplied to the load of the hydrogen energy power station, such as a fan, so that a set of complete environment-friendly treatment system is formed.

Description

Technical Field

[0001] The utility model relates to an exhaust gas treatment system, in particular to an exhaust gas treatment system for a hydrogen energy power station. Background Art

[0002] There are two types of exhaust gases in a hydrogen energy power station, one is hydrogen exhaust gas and the other is air exhaust gas. Usually, these exhaust gases are directly discharged into the atmosphere. The direct discharge of air has no pollution risk and safety hazard, but the direct discharge of hydrogen has poor safety. Therefore, the hydrogen removal treatment of the exhaust gas discharge of the hydrogen energy power station is particularly important. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an exhaust gas treatment system for a hydrogen energy power station, which includes: a hydrogen removal device, which includes an outer shell, an inner shell, a heat insulation layer between the outer shell and the inner shell, a treatment chamber located in the inner shell, an air inlet and an air outlet that penetrate the outer shell, the heat insulation layer and the inner shell and are communicated with the treatment chamber. The treatment chamber is divided into a left chamber and a right chamber by a partition plate. The partition plate is provided with ventilation holes. The right chamber is provided with a hydrogen removal reactor. The hydrogen removal reactor includes a main body composed of bipolar plates and a hydrogen chamber in the main body, and a proton exchange membrane inserted on the main body and extending into the hydrogen chamber. The air inlet includes a hydrogen inlet and two air inlets. The two air inlets are communicated with the right chamber. The hydrogen inlet is communicated with the hydrogen chamber of the hydrogen removal reactor. The left chamber is provided with a gas-water separator. The air outlet is communicated with the left chamber. Drain valves are provided at the bottoms of both the left chamber and the right chamber. One of the hydrogen inlets is connected to the hydrogen exhaust port of the hydrogen energy power station through a pipeline, and the two air inlets are connected to the air exhaust port of the hydrogen energy power station through pipelines; an expander, which is connected to the air outlet of the hydrogen removal device through a pipeline; a generator, whose rotor is fixedly connected to the output shaft of the expander.

[0004] A further technical feature of the utility model is:

[0005] The gas-water separator in the left chamber of the hydrogen removal device includes a first baffle, a second baffle and a third baffle, so that the gas and water flow in an S-shaped curve between the ventilation holes of the partition plate and the air outlet. The third baffle is a fancy composite baffle with a shunting function.

[0006] A heating rod is arranged in the partition plate, and the heating rod is electrically connected to the anode of the bipolar plate on the inner side of the main body of the hydrogen removal reactor through a conductive copper sheet.

[0007] A secondary gas-water separation device is also connected to the hydrogen removal device and the expander through a pipeline.

[0008] The secondary gas-water separation device includes a housing, an air inlet and a water outlet provided below the housing, and an air outlet provided above the housing. The housing is divided into an upper cavity and a lower cavity by a first baffle. The upper cavity is communicated with the air outlet. The lower cavity is divided into a first cavity and a second cavity by a second baffle. The first cavity is communicated with the air inlet. An S-shaped air flow channel is arranged in the first cavity. A cyclone separator is arranged from the second cavity to the upper cavity, passing through the second baffle, the first cavity, and the first baffle. The cyclone separator includes an air outlet pipe, a guide cover, a conical guide plate, and an impeller placed inside the conical guide plate. The air outlet pipe of the cyclone separator is communicated with the upper cavity. The air inlet end of the cyclone separator is arranged at the lower end of the conical guide plate in the second cavity. The S-shaped air flow channel in the first cavity is communicated with the second cavity through the guide cover of the cyclone separator. The lower parts of the first cavity and the second cavity are communicated and are sloped with the left side higher than the right side. A drain valve communicated with the water outlet is arranged at the bottom of the second cavity.

[0009] The S-shaped air flow channel in the first cavity is composed of a third baffle and a fourth baffle.

[0010] The cyclone separator is fixed on the housing by a clamping plate, and a gas baffle and a liquid water baffle are also arranged below the cyclone separator.

[0011] The beneficial effects of the utility model patent are as follows:

[0012] Since the treatment chamber of the hydrogen removal device in the utility model is divided into left and right chambers by a partition plate, a hydrogen removal reactor is arranged in the right chamber, and a gas-water separator is arranged in the left chamber. In this way, the tail gas of the hydrogen energy power station not only completes the hydrogen removal treatment well, eliminating potential safety hazards, but also can obtain dry air after primary water removal and then secondary water removal by the secondary gas-water separation device. The dry air expands through an expander, generating kinetic energy to drive the impeller of the expander to rotate. The rotation of the impeller of the expander drives the output shaft of the expander to rotate, further driving the rotor of the generator connected to the output shaft of the expander to rotate, so as to generate electricity by the engine, converting mechanical energy into electrical energy to supply power to the load of the hydrogen energy power station. In this way, the tail gas of the hydrogen energy power station can be reused for green power generation and supply power to the load of the hydrogen energy power station, such as a fan, forming a complete environmental protection treatment system. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of an embodiment of the utility model;

[0014] Figure 2 is Figure 1 a schematic structural diagram of an embodiment of the hydrogen removal device in

[0015] Figure 3 is Figure 1 a schematic structural diagram of an embodiment of the secondary gas-water separation device in Detailed implementation mode

[0016] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0017] Refer to Figures 1-3 , a tail gas treatment system for a hydrogen energy power station, which includes: a hydrogen removal device 1, the hydrogen removal device 1 includes an outer shell 11, an inner shell 12, a heat insulation layer 13 between the outer shell 11 and the inner shell 12, a treatment chamber located in the inner shell, an air inlet 14 and an air outlet 15 that penetrate the outer shell 11, the heat insulation layer 13 and the inner shell 12 and are communicated with the treatment chamber. The treatment chamber is divided into a left chamber 17 and a right chamber 18 by a partition 16. The partition 16 is provided with ventilation holes 1601. The right chamber 18 is provided with a hydrogen removal reactor 19. The hydrogen removal reactor includes a main body 1901 composed of bipolar plates, a hydrogen chamber 1902 in the main body, and a proton exchange membrane 1903 inserted on the main body 1901 and extending into the hydrogen chamber 1902. The air inlet 14 includes a hydrogen inlet 1401 and two air inlets 1402. The two air inlets 1402 are communicated with the right chamber 18. The hydrogen inlet 1401 is communicated with the hydrogen chamber 1902 of the hydrogen removal reactor. The left chamber 17 is provided with a gas-water separator 100. The air outlet 15 is communicated with the left chamber 17. Drain valves 110 are provided at the bottoms of both the left chamber 17 and the right chamber 18. One of the hydrogen inlets 1401 is connected to the hydrogen exhaust port pipeline of the hydrogen energy power station, and the two air inlets 1402 are connected to the air exhaust port pipeline of the hydrogen energy power station; an expander 2, which is connected to the air outlet pipeline of the hydrogen removal device; a generator 3, whose rotor is fixedly connected to the output shaft of the expander 2.

[0018] In this embodiment, the gas-water separator 100 in the left chamber includes a first baffle 1001, a second baffle 1002 and a third baffle 1003, which enable the gas and water to flow in an S-shaped curve between the partition ventilation holes 1601 and the air outlet 15. The third baffle 1003 is a fancy composite baffle with a shunt function, which is more conducive to water removal. A heating rod 112 is arranged in the partition 16. The heating rod 112 is electrically connected to the anode of the bipolar plate on the inner side of the hydrogen removal reaction kettle body through a conductive copper sheet. The optimal working temperature of the hydrogen removal reaction kettle is between 65°C and 85°C. The reaction kettle can generate electric energy at the anode through the electrochemical reaction inside it, and is connected to the heating rod 112 through a conductive copper sheet (not shown in the figure). The heating rod 112 heats the environment through the heat generated by electric heating, so that the hydrogen removal reaction kettle is maintained in the optimal working temperature environment. In addition, in this embodiment, a secondary gas-water separation device 4 is also connected in pipeline between the hydrogen removal device and the expander. The secondary gas-water separation device includes a housing 41, an air inlet 42 and a water outlet 43 arranged below the housing, and an air outlet 44 arranged above the housing. The inside of the housing is divided into an upper cavity 46 and a lower cavity by a first baffle 45. The upper cavity 46 is communicated with the air outlet 44. The lower cavity is divided into a first cavity 48 and a second cavity 49 by a second baffle 47. The first cavity 48 is communicated with the air inlet 42. An S-shaped air flow channel is arranged in the first cavity 48. A cyclone separator 410 is arranged from the second cavity 49 to the upper cavity 46 and penetrates through the second baffle 47, the first cavity 48 and the first baffle 45 at the same time. The cyclone separator includes an air outlet pipe 4101, a guide cover 4102, a conical guide plate 4103 and an impeller (not shown in the figure) placed inside the conical guide plate. The air outlet pipe 4101 of the cyclone separator 410 is communicated with the upper cavity 46. The air inlet end of the cyclone separator 410 is arranged at the lower end of the conical guide plate 4103 in the second cavity. The S-shaped air flow channel in the first cavity 48 and the second cavity 49 are communicated through the guide cover 4102 of the cyclone separator. The lower parts of the first cavity 48 and the second cavity 49 are communicated and are in a slope shape with the left side higher than the right side. A drain valve 411 communicated with the water outlet 43 is arranged at the bottom of the second cavity. In this embodiment, the S-shaped air flow channel in the first cavity is composed of a third baffle 412 and a fourth baffle 413. A gas baffle 414 and a liquid water baffle 415 are also arranged below the cyclone separator. The cyclone separator is fixed on the inner wall of the housing through a clamping plate 416.In this embodiment, the gas-water enters the first cavity 48 from the air inlet 42, passes through the S-shaped air flow path formed by the third baffle 412 and the fourth baffle 413, enters the second cavity 49 through the flow guide cover, and then enters the air inlet end of the cyclone separator from the gas baffle 414 at the lower end of the conical guide plate. It then passes through the air outlet pipe 4101 of the cyclone separator and enters the upper cavity 46, and finally is discharged from the air outlet 44. On the way, the water condensed on the third baffle 412, the fourth baffle 413, and the second baffle 47 in the first cavity 48 enters the lower part of the first cavity. The water separated by the cyclone separator in the second cavity 49, the water condensed on the gas baffle 414 and the second baffle 47 enter the lower part of the second cavity through the liquid baffle 415 or the inner wall of the housing. Finally, all the water converges and is discharged through the drain valve 411 installed on the water outlet 43. This embodiment adopts a combined mode of baffle design + cyclone separator + baffle design, and the baffle design in the first cavity 48 forms an S-shaped flow path, which not only extends the length of the gas-water flow path but also combines with the cyclone separator, making the overall gas-water separation effect more prominent. The double water removal can ensure that the air does not contain liquid water. Since the expander in this utility model adopts a high-speed expander with a rotational speed of up to 120,000 revolutions per minute, the presence of liquid water at this rotational speed will impact the expander impeller. The liquid droplets repeatedly impact the impeller blades at a relatively high speed, resulting in blade corrosion, thus affecting the use of the equipment. Therefore, a secondary gas-water separation device is added before the expander inlet to protect the expander.

[0019] Since the treatment chamber of the hydrogen removal device 1 in this utility model is divided into left and right chambers by a partition, the right chamber is provided with a hydrogen removal reactor 19, and the left chamber is provided with a gas-water separator 100. In this way, the tail gas of the hydrogen energy power station not only completes the hydrogen removal treatment well and eliminates potential safety hazards, but also can obtain dry air after the first water removal and then through the secondary gas-water separation device. The dry air expands through the expander, generating kinetic energy to drive the impeller of the expander 2 to rotate. The rotation of the expander impeller drives the rotation of the expander output shaft, further driving the rotation of the rotor of the generator 3 connected to the expander output shaft, thereby enabling the engine to generate electricity and converting mechanical energy into electrical energy to supply power to the load of the hydrogen energy power station, such as a fan. In this way, the tail gas of the hydrogen energy power station can be reused for green power generation and supply power to the load of the hydrogen energy power station, such as a fan, etc., forming a complete environmental protection treatment system.

[0020] The technical content and technical features of this utility model have been disclosed above. However, it can be understood that under the creative concept of this utility model, those skilled in the art can make various changes and improvements to the above structure, including combinations of the technical features disclosed or claimed here alone, and obviously other combinations of these features. These deformations and / or combinations all fall within the technical field involved in this utility model and within the protection scope of the claims of this utility model. The protection scope of this utility model shall be subject to the claims.

Claims

1. A tail gas treatment system for a hydrogen energy power station, characterized in that Comprising: A de-hydrogenation device, which includes an outer shell, an inner shell, a heat-insulating layer between the outer shell and the inner shell, a treatment chamber located in the inner shell, an air inlet and an air outlet that penetrate through the outer shell, the heat-insulating layer and the inner shell and are in communication with the treatment chamber. The treatment chamber is divided into a left chamber and a right chamber by a partition board. There are ventilation holes on the partition board. A de-hydrogenation reactor is arranged in the right chamber. The de-hydrogenation reactor includes a body composed of bipolar plates and a hydrogen chamber in the body, and a proton exchange membrane inserted on the body and extending into the hydrogen chamber. The air inlet includes a hydrogen inlet and two air inlets. The two air inlets are in communication with the right chamber. The hydrogen inlet is in communication with the hydrogen chamber of the de-hydrogenation reactor. A gas-water separator is arranged in the left chamber. The air outlet is in communication with the left chamber. Drain valves are arranged at the bottoms of both the left chamber and the right chamber. Wherein one of the hydrogen inlets is connected to the hydrogen exhaust port of the hydrogen energy power station through a pipeline, and the two air inlets are connected to the air exhaust port of the hydrogen energy power station through pipelines; An expander, which is connected to the air outlet of the de-hydrogenation device through a pipeline; A generator, whose rotor is fixedly connected to the output shaft of the expander.

2. The tail gas treatment system of the hydrogen energy power station according to claim 1, characterized in that: The gas-water separator in the left chamber of the de-hydrogenation device includes a first baffle, a second baffle and a third baffle, so that the gas and water flow in an S-shaped curve between the ventilation holes of the partition board and the air outlet. Wherein the third baffle is a fancy composite baffle with a shunting function.

3. The tail gas treatment system of the hydrogen energy power station according to claim 1 or claim 2, characterized in that: A heating rod is arranged in the partition board, and the heating rod is electrically connected to the anode of the bipolar plate on the inner side of the body of the de-hydrogenation reactor through a conductive copper sheet.

4. The tail gas treatment system of the hydrogen energy power generation station according to claim 1 or claim 2 or claim 3, characterized in that: A secondary gas-water separation device is also connected to the de-hydrogenation device and the expander through pipelines.

5. The tail gas treatment system of the hydrogen energy power generation station according to claim 4, characterized in that: The secondary gas-water separation device includes a housing, an air inlet and a water outlet arranged below the housing, and an air outlet arranged above the housing. The housing is divided into an upper cavity and a lower cavity by a first baffle. The upper cavity is in communication with the air outlet. The lower cavity is divided into a first cavity and a second cavity by a second baffle. The first cavity is in communication with the air inlet. Wherein an S-shaped air flow channel is arranged in the first cavity. A cyclone separator is arranged from the second cavity to the upper cavity and penetrates through the second baffle, the first cavity and the first baffle at the same time. The cyclone separator includes an air outlet pipe, a diversion cover, a conical guide plate and an impeller placed in the conical guide plate. The air outlet pipe of the cyclone separator is in communication with the upper cavity. The air inlet end of the cyclone separator is arranged at the lower end of the conical guide plate in the second cavity. The S-shaped air flow channel in the first cavity and the second cavity are in communication through the diversion cover of the cyclone separator. The lower parts of the first cavity and the second cavity are in communication and are in a slope shape with the left side higher than the right side. A drain valve communicated with the water outlet is arranged at the bottom of the second cavity.

6. The tail gas treatment system of the hydrogen energy power generation station according to claim 5, characterized in that: The S-shaped air flow channel in the first cavity is composed of a third baffle and a fourth baffle.

7. The tail gas treatment system of the hydrogen energy power generation station according to claim 5, characterized in that: The cyclone separator is fixed on the housing through a clamping plate, and a gas baffle and a liquid water baffle are also arranged below the cyclone separator.

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