Power generation system

Abstract

The embodiment of the invention provides a power generation system. The power generation system comprises an ammonia source, a first cracker, a second cracker and a fuel cell, the first cracker and the second cracker are connected to an outlet of the ammonia source in parallel, and the first cracker is used for generating heat under electric driving and cracking ammonia gas provided by the ammonia source; the first cracker is connected with the second cracker to supply mixed gas generated after cracking to the second cracker, the second cracker is used for combusting the mixed gas to generate heat and cracking ammonia gas provided by the ammonia source, and the second cracker is connected with the inlet end of the fuel cell to supply the mixed gas generated after cracking to the fuel cell for power generation.

Description

Technical Field

[0001] The present invention relates to the field of power generation, and in particular to a power generation system. Background Art

[0002] In the related art, the power generation system is provided with an ammonia cracking device and a fuel cell. Ammonia is cracked into a mixed gas of hydrogen and nitrogen in the ammonia cracking device, and the mixed gas is supplied to the fuel cell to generate electricity. Since ammonia cracking needs to be carried out at a certain temperature, the temperature generated by the combustion of the mixed gas is used in the related art to heat the ammonia. However, the mixed gas is produced after the cracking of ammonia, and the cracking of ammonia requires the combustion of the mixed gas for heating. Therefore, the power generation system in the related art has the problem of being difficult to start operation. If hydrogen or the mixed gas is stored separately to start the cracking of ammonia in the ammonia cracking device, there are problems that hydrogen is difficult to store and the storage safety is low. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a power generation system.

[0005] The power generation system of the embodiment of the present invention comprises:

[0006] An ammonia source, a first cracker, a second cracker and a fuel cell, wherein the first cracker and the second cracker are connected in parallel to the outlet of the ammonia source, the first cracker is used to generate heat under electric drive and crack the ammonia provided by the ammonia source, the first cracker is connected to the second cracker to supply the mixed gas produced after cracking to the second cracker, the second cracker is used to burn the mixed gas to generate heat and crack the ammonia provided by the ammonia source, and the second cracker is connected to the inlet end of the fuel cell to supply the mixed gas produced after cracking to the fuel cell for power generation.

[0007] The power generation system of the embodiment of the present invention first cracks the ammonia from the ammonia source under the heat generated by the internal electricity through the first cracker, and supplies the mixed gas generated by the cracking of the first cracker to the second cracker, so that the second cracker cracks the ammonia from the ammonia source under the heat generated by the combustion of the mixed gas supplied by the first cracker, and then the mixed gas generated by the cracking of the second cracker is supplied to the fuel cell for power generation, thereby making the power generation system of the embodiment of the present invention easy to operate and highly safe.

[0008] In some embodiments, the power generation system further comprises a battery connected between the power output end of the fuel cell and the first cracker, the battery being used to receive and store part of the power generated by the fuel cell and to supply the stored power to the first cracker.

[0009] In some embodiments, a control valve is provided at one end of the first cracker connected to the ammonia source and at one end of the second cracker connected to the ammonia source.

[0010] In some embodiments, the outlet end of the fuel cell is connected to the second cracker to supply the mixed gas remaining after power generation to the second cracker.

[0011] In some embodiments, the second crackers are at least two connected in series between the ammonia source and the inlet end of the fuel cell, and each of the second crackers is connected to the first cracker and the outlet end of the fuel cell.

[0012] In some embodiments, the power generation system further includes an ammonia adsorption device, which is connected between the inlet end of the fuel cell and the second cracker closest to the upstream of the fuel cell, and the ammonia adsorption device is used to adsorb and remove ammonia in the mixed gas supplied to the fuel cell.

[0013] In some embodiments, the ammonia adsorption device is connected to the mixed gas inlet of the second cracker to supply part of the mixed gas to the second cracker.

[0014] In some embodiments, the power generation system also includes a mixed gas supply pipeline, which includes a first inlet branch, a second inlet branch, a third inlet branch and at least two outlet branches, the first inlet branch is connected to the first cracker, the second inlet branch is connected to the outlet end of the fuel cell, the third inlet branch is connected to the ammonia adsorption device, and the outlet branch is connected to the second cracker one-to-one, the first inlet branch and the third inlet branch are provided with control valves, and the second inlet branch and the outlet branch are both provided with check valves.

[0015] In some embodiments, the power generation system further includes a first branch, a second branch and a cooling device, the first branch and the second branch are connected in parallel between the ammonia adsorption device and the second cracker closest to the upstream of the ammonia adsorption device, the first branch is provided with the cooling device, and the second branch is provided with a control valve.

[0016] In some embodiments, the power generation system further includes a boost pump, a pressure stabilizing tank and a nozzle, wherein the boost pump, the pressure stabilizing tank and the nozzle are connected between the ammonia adsorption device and the inlet end of the fuel cell, and are arranged in sequence from the ammonia adsorption device to the inlet end of the fuel cell.

[0017] In some embodiments, the power generation system further includes a driving pump, an evaporator and a miscellaneous gas adsorption device, wherein the driving pump, the evaporator and the miscellaneous gas adsorption device are connected between the ammonia source and the first cracker and the second cracker connected in parallel, and are arranged in sequence along the flow direction of ammonia supplied by the ammonia source, and the miscellaneous gas adsorption device is used to adsorb and remove gases other than ammonia. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of a power generation system according to an embodiment of the present invention.

[0019] Reference numerals:

[0020] 1. Ammonia source; 2. First cracker; 3. Second cracker; 4. Fuel cell; 5. Battery; 6. Control valve; 7. Ammonia adsorption device; 71. Adsorption tower; 8. Mixed gas supply pipeline; 81. First inlet branch; 82. Second inlet branch; 83. Third inlet branch; 84. Outlet branch; 9. Check valve; 10. First branch; 11. Second branch; 12. Cooling device; 13. Booster pump; 14. Pressure stabilizing tank; 15. Nozzle; 16. Drive pump; 17. Evaporator; 18. Miscellaneous gas adsorption device. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0022] Reference below Figure 1 A power generation system according to an embodiment of the present invention is described.

[0023] like Figure 1 As shown, the power generation system of the embodiment of the present invention includes an ammonia source 1, a first cracker 2, a second cracker 3 and a fuel cell 4.

[0024] The first cracker 2 and the second cracker 3 are connected in parallel to the outlet of the ammonia source 1, the first cracker 2 is used to generate heat under electric drive and crack the ammonia provided by the ammonia source 1, the first cracker 2 is connected to the second cracker 3 to supply the mixed gas produced after cracking to the second cracker 3, the second cracker 3 is used to burn the mixed gas to generate heat and crack the ammonia provided by the ammonia source 1, and the second cracker 3 is connected to the inlet end of the fuel cell 4 to supply the mixed gas produced after cracking to the fuel cell 4 to generate electricity.

[0025] For example, Figure 1As shown, the ammonia source 1 is connected to the fuel cell 4 through the main pipeline. The second cracker 3 is arranged on the main pipeline and is located between the ammonia source 1 and the fuel cell 4. The first cracker 2 is connected to the main pipeline through a branch pipeline and is connected between the ammonia source 1 and the second cracker 3. The first cracker 2 is also connected to the second cracker 3 through at least part of the mixed gas supply pipeline 8.

[0026] When the power generation system starts to operate, the ammonia source 1 first supplies a small amount of ammonia to the first cracker 2 through the main pipeline and the branch pipeline. The first cracker 2 generates heat under the drive of electricity and cracks the ammonia supplied by the ammonia source 1, thereby generating a small amount of mixed gas including hydrogen and nitrogen. The first cracker 2 preferably but not limited to supplies the small amount of mixed gas it generates to the second cracker 3 through at least part of the mixed gas supply pipeline 8. At the same time, the ammonia source 1 supplies a large amount of ammonia to the second cracker 3 through the main pipeline. The second cracker 3 obtains the small amount of mixed gas supplied by the first cracker 2 and makes the hydrogen in it burn to generate heat, thereby cracking the large amount of ammonia supplied by the ammonia source 1 and generating a large amount of mixed gas. The large amount of mixed gas is supplied to the anode of the fuel cell 4 through the main pipeline. At the same time, oxygen or air is supplied to the cathode of the fuel cell 4, so that the fuel cell 4 uses the oxygen and hydrogen in the mixed gas to react to generate electricity.

[0027] In the power generation system of the embodiment of the present invention, first, the ammonia from the ammonia source is cracked by the first cracker under the heat generated by the internal power, and the mixed gas cracked by the first cracker is supplied to the second cracker, so that the second cracker cracks the ammonia from the ammonia source under the heat generated by the combustion of the mixed gas supplied by the first cracker, and then the mixed gas cracked by the second cracker is supplied to the fuel cell for power generation, thereby making the power generation system of the embodiment of the present invention operate conveniently and with high safety.

[0028] In a series of embodiments, the outlet end of the fuel cell 4 is connected to the second cracker 3 to supply the remaining mixed gas after power generation to the second cracker 3.

[0029] As Figure 1 shown, the first cracker 2 is provided with a first ammonia inlet, a first mixed gas outlet and an electrical interface. The first ammonia inlet is arranged on the branch pipeline to receive ammonia for cracking. The first mixed gas outlet is preferably but not limited to connected to the mixed gas supply pipeline 8 to discharge the cracked mixed gas. The electrical interface is preferably but not limited to connected to an electric wire to receive electricity to generate heat.

[0030] The second cracker 3 is provided with a second ammonia inlet, a second mixed gas outlet and a mixed gas inlet. Both the second ammonia inlet and the second mixed gas outlet are arranged on the main pipeline. The second ammonia inlet is used to receive ammonia for cracking. The second mixed gas outlet is used to discharge the cracked mixed gas. The mixed gas inlet is used to receive the mixed gas to burn and generate heat.

[0031] The outlet end of the fuel cell 4 is preferably, but not limited to, connected to the mixed gas inlet of the second cracker 3 through a portion of a mixed gas supply pipeline 8. The mixed gas remaining after power generation in the anode of the fuel cell 4 is discharged from the outlet end of the fuel cell 4, and is preferably, but not limited to, supplied to the second cracker 3 through the mixed gas supply pipeline 8, so that the hydrogen therein burns to generate heat, thereby maintaining the operation of the second cracker 3 through the mixed gas discharged to the second cracker 3 through the fuel cell 4.

[0032] It should be noted that during the normal operation of the power generation system, the mixed gas discharged from the outlet end of the fuel cell 4 is supplied to the second cracker 3. The first cracker 2 can operate normally after the second cracker 3 is operated, or it can stop operating after the second cracker 3 is operated. In other words, after the second cracker 3 starts to operate under the combustion of the mixed gas supplied by the first cracker 2, it can receive the mixed gas jointly provided by the fuel cell 4 and the first cracker 2 to continue operating, or it can only receive the mixed gas provided by the fuel cell 4 to continue operating.

[0033] Preferably, the first cracker 2 stops operating after the second cracker 3 is operated.

[0034] The mixed gas discharged by the fuel cell 4 maintains the operation of the second cracker 3 to reduce the operating power of the first cracker 2 or stop the operation of the first cracker 2, thereby reducing the power consumption of the first cracker 2.

[0035] In some embodiments, a control valve 6 is provided at one end of the first cracker 2 connected to the ammonia source 1 and at one end of the second cracker 3 connected to the ammonia source 1 .

[0036] like Figure 1 As shown, the main pipeline is provided with a control valve 6 between the interface of the branch pipeline and the second ammonia inlet of the second cracker 3 to control the amount of ammonia supplied from the ammonia source 1 to the second cracker 3. The branch pipeline is provided with a control valve 6 located between its interface and the first ammonia inlet of the first cracker 2 to control the amount of ammonia supplied from the ammonia source 1 to the first cracker 2.

[0037] Thus, when the power generation system starts to operate, a small amount of ammonia supplied by the ammonia source 1 is supplied to the first cracker 2, and a large amount of ammonia is supplied to the second cracker 3. During the normal operation of the power generation system, it is preferred but not limited to that all the ammonia supplied by the ammonia source 1 is supplied to the second cracker 3. After the second cracker 3 is operated, the first cracker 2 stops operating and no longer receives ammonia supplied by the ammonia source 1.

[0038] In a series of embodiments, the power generation system of the embodiment of the present invention also includes a battery 5, which is connected between the power output end of the fuel cell 4 and the first cracker 2, and the battery 5 is used to receive and store part of the electricity generated by the fuel cell 4 and to supply the stored electricity to the first cracker 2.

[0039] like Figure 1 As shown, the power generation system also includes a battery 5, which is connected between the power output end of the fuel cell 4 and the electrical interface of the first cracker 2 through an electric wire. In addition to being connected to the battery 5, the power output end of the fuel cell 4 is also connected to an electrical device. Most of the electricity generated by the fuel cell 4 is supplied to the electrical device, and a small part is supplied to the battery 5 for storage.

[0040] When the first cracker 2 starts to operate, the power obtained and stored by the battery 5 when the power generation system is previously operated is supplied to the first cracker 2, so that the first cracker 2 can operate and generate heat for cracking.

[0041] During the normal operation of the power generation system, if the first cracker 2 continues to operate after the second cracker 3 is operated, a small amount of electricity generated by the fuel cell 4 is continuously supplied to the battery 5, and the battery 5 continues to supply electricity to the first cracker 2 to maintain the operation of the first cracker 2. If the first cracker 2 stops operating after the second cracker 3 is operated, the small amount of electricity generated by the fuel cell 4 will fully charge the battery 5 and no longer supply power to the battery 5, and all the electricity generated by the fuel cell 4 is supplied to the electrical equipment.

[0042] Part of the electricity generated by the fuel cell 4 is stored in the battery 5 and is used to supply the first cracker 2 to operate the first cracker 2, so that the electricity consumed by the first cracker 2 comes from the power generation system itself, avoiding the consumption of external electricity due to the first cracker 2 when the power generation system is running, and enabling the power generation system to operate in an environment without power supply.

[0043] In some embodiments, at least two second crackers 3 are connected in series between the ammonia source 1 and the inlet end of the fuel cell 4 , and each second cracker 3 is connected to the outlet end of the first cracker 2 and the fuel cell 4 .

[0044] like Figure 1 As shown, there are at least two second crackers 3 arranged on the main pipeline and connected in sequence, preferably but not limited to two, and each second cracker 3 is preferably but not limited to connected to the outlet end of the first cracker 2 and the fuel cell 4 through a mixed gas supply pipeline 8, so that the mixed gas discharged from the fuel cell 4 and the first cracker 2 can be supplied to each second cracker 3.

[0045] During normal operation of the power generation system, the ammonia supplied by the ammonia source 1 passes through two second crackers 3 in sequence. When the ammonia passes through the first second cracker 3, a part of the ammonia is cracked to produce a mixed gas. The mixed gas produced by the first second cracker 3 and the other part of the ammonia that is not cracked are simultaneously supplied to the second second cracker 3, wherein the hydrogen in the mixed gas produced by the first second cracker 3 burns in the second cracker 3 to generate heat, and the other part of the ammonia that is not cracked is fully cracked in the second second cracker 3.

[0046] Therefore, the first second cracker 3 plays the role of cracking ammonia and providing the mixed gas to the second second cracker 3, and the second second cracker 3 plays the role of fully cracking the ammonia, so that the two second crackers 3 complete the full cracking of ammonia to ensure that the amount of hydrogen required for power generation is provided to the fuel cell 4. At the same time, the mixed gas generated by the first second cracker 3 and the mixed gas discharged by the fuel cell 4 are burned together to generate sufficient heat, so that the first cracker 2 can stop running after the second cracker 3 is running, reducing the effect of electricity, and the electricity generated by the fuel cell 4 is used for consumption of electrical equipment.

[0047] In some embodiments, the power generation system of the embodiment of the present invention also includes an ammonia adsorption device 7, which is connected between the inlet end of the fuel cell 4 and the second cracker 3 closest to the upstream of the fuel cell 4. The ammonia adsorption device 7 is used to adsorb and remove ammonia in the mixed gas supplied to the fuel cell 4.

[0048] like Figure 1 As shown, the main pipeline is provided with an ammonia adsorption device 7, which is arranged downstream of all the second crackers 3 along the flow direction of the gas in the main pipeline and upstream of the fuel cell 4.

[0049] The mixed gas after the ammonia is cracked by the entire second cracker 3 mainly consists of hydrogen and nitrogen, but in some cases a small amount of ammonia is still retained. The mixed gas after the ammonia is cracked by the entire second cracker 3 passes through the ammonia adsorption device 7 during the process of being supplied to the fuel cell 4 along the main pipeline. The ammonia in the mixed gas passing through the ammonia adsorption device 7 is adsorbed and removed by the ammonia adsorption device 7 to avoid ammonia being supplied to the fuel cell 4.

[0050] The ammonia adsorption device 7 preferably but not limited to includes at least two adsorption towers 71 connected in parallel, more preferably two. The first adsorption tower 71 is first used to adsorb and remove ammonia in the gas passing through the ammonia adsorption device 7. After the first adsorption tower 71 reaches the adsorption limit value, the second adsorption tower 71 is replaced to adsorb and remove ammonia in the gas passing through the ammonia adsorption device 7, and the ammonia adsorbed in the first adsorption tower 71 is cleaned and discharged to achieve desorption, so that the ammonia adsorption device 7 can continue to operate by circulating the two adsorption towers 71 in sequence.

[0051] In some embodiments, the ammonia adsorption device 7 is connected to the mixed gas inlet of the second cracker 3 to supply part of the mixed gas to the second cracker 3 .

[0052] like Figure 1 As shown, the ammonia adsorption device 7 is preferably but not limited to being connected to the mixed gas inlet of the second cracker 3 through a portion of the mixed gas supply pipeline 8 to supply part of the mixed gas to the second cracker 3 .

[0053] Preferably, each adsorption tower 71 is connected to the mixed gas inlet of each second cracker 3 through a mixed gas supply pipeline 8. After the adsorption tower 71 reaches the adsorption limit value, a large amount of mixed gas from the second cracker 3 is supplied to the adsorption tower 71, and the nitrogen in the large amount of mixed gas supplied is purged to the adsorption tower 71, thereby taking out the ammonia adsorbed by the adsorption tower 71, so that the adsorption tower 71 is desorbed to be able to perform the next adsorption operation. The mixed gas containing the purged ammonia discharged from the adsorption tower 71 is supplied to the second cracker 3 through the mixed gas supply pipeline 8, and is burned in the second cracker 3 at the same time as the mixed gas discharged from the fuel cell 4 to generate heat for reuse and maintain the operation of the second cracker 3. At the same time, the purging and desorption of the adsorption tower 71 by the mixed gas reduces the structural complexity of the adsorption tower 71 and the complexity of the desorption operation.

[0054] The adsorption tower 71 can be provided with an inlet and a total outlet, and the total outlet can be connected to the main pipeline and the mixed gas supply pipeline 8 in an on-off manner. When the adsorption tower 71 is in adsorption operation, the total outlet of the adsorption tower 71 is connected to the main pipeline and disconnected from the mixed gas supply pipeline 8 to supply the adsorbed mixed gas to the fuel cell 4. When the adsorption tower 71 is in desorption operation, the total outlet of the adsorption tower 71 is disconnected from the main pipeline and connected to the mixed gas supply pipeline 8 to supply the mixed gas containing the purged ammonia to the second cracker 3.

[0055] The adsorption tower 71 may also be provided with an inlet, an adsorption outlet and a desorption outlet at the same time. The adsorption outlet is connected to the main pipeline, and is used to discharge the adsorbed mixed gas and supply it to the fuel cell 4. The desorption outlet is connected to the mixed gas supply pipeline 8, and is used to discharge the mixed gas containing the purged ammonia and supply it to the second cracker 3. When the adsorption tower 71 is in adsorption operation, the adsorption outlet is opened and the desorption outlet is closed. When the adsorption tower 71 is in desorption operation, the adsorption outlet is closed and the desorption outlet is opened.

[0056] In some embodiments, the power generation system of the embodiment of the present invention also includes a mixed gas supply pipeline 8, the mixed gas supply pipeline 8 includes a first inlet branch 81, a second inlet branch 82, a third inlet branch 83 and at least two outlet branches 84, the first inlet branch 81 is connected to the first cracker 2, the second inlet branch 82 is connected to the outlet end of the fuel cell 4, the third inlet branch 83 is connected to the ammonia adsorption device 7, and the outlet branch 84 is connected to the second cracker 3 one-to-one, the first inlet branch 81 and the third inlet branch 83 are provided with a control valve 6, and the second inlet branch 82 and the outlet branch 84 are both provided with a check valve 9.

[0057] like Figure 1As shown, the mixed gas supply pipeline 8 includes a first inlet branch 81, a second inlet branch 82, a third inlet branch 83 and at least two outlet branches 84 connected to each other. The first inlet branch 81 is connected to the first mixed gas outlet of the first cracker 2 to receive the mixed gas generated by cracking of the first cracker 2. The second inlet branch 82 is connected to the outlet end of the fuel cell 4 to receive the remaining mixed gas discharged from the outlet end of the fuel cell 4. The third inlet branch 83 is connected to the ammonia adsorption device 7, preferably connected to the total outlet or desorption outlet of each adsorption tower 71, to receive the mixed gas containing purged ammonia discharged by desorption from the adsorption tower 71. The outlet branches 84 are two connected to the second crackers 3 one by one to supply the mixed gas in the mixed gas supply pipeline 8 to the second cracker 3 for combustion to generate heat.

[0058] The first inlet branch 81 and the third inlet branch 83 are provided with control valves 6 to respectively control the on-off of the first inlet branch 81 and the third inlet branch 83, in other words, respectively control the on-off of the first mixed gas outlet of the first cracker 2 and the total outlet or desorption outlet of the adsorption tower 71. The control valve 6 on the first inlet branch 81 is opened when the first cracker 2 is in operation and is closed when the first cracker 2 is stopped, and the control valve 6 on the third inlet branch 83 is opened when the adsorption tower 71 is in desorption operation and is closed when all the adsorption towers 71 are in adsorption operation.

[0059] The second inlet branch 82 and the outlet branch 84 are both provided with a check valve 9 to prevent the mixed gas in the mixed gas supply pipeline 8 from flowing back in the second inlet branch 82 and the outlet branch 84 .

[0060] It can be understood that the power generation system is not limited to having a mixed gas supply pipeline. In other embodiments, corresponding pipelines are respectively provided between the first mixed gas outlet of the first cracker 2 and the mixed gas inlet of the second cracker 3, between the total outlet or desorption outlet of the adsorption tower 71 and the mixed gas inlet of the second cracker 3, and between the outlet end of the fuel cell 4 and the mixed gas inlet of the second cracker 3.

[0061] In some embodiments, the power generation system of the embodiment of the present invention also includes a first branch 10, a second branch 11 and a cooling device 12. The first branch 10 and the second branch 11 are connected in parallel between the ammonia adsorption device 7 and the second cracker 3 closest to the upstream of the ammonia adsorption device 7. The first branch 10 is provided with a cooling device 12, and the second branch 11 is provided with a control valve 6.

[0062] like Figure 1As shown, the main pipeline has a first branch 10 and a second branch 11 in parallel, and the parallel first branch 10 and the second branch 11 are located between the last second cracker 3 and the ammonia adsorption device 7 along the gas flow direction in the main pipeline. The first branch 10 is provided with a cooling device 12, and the cooling device 12 is preferably but not limited to a heat exchanger, which is used to cool the mixed gas passing through the first branch 10. The second branch 11 is provided with a control valve 6, and the control valve 6 on the second branch 11 controls the opening and closing of the second branch 11, and can further control the flow rate of the mixed gas in the second branch 11, so as to control the flow rate of the mixed gas after cracking by all the second crackers 3 through the cooling device 12 to the ammonia adsorption device 7, so that the temperature of the mixed gas supplied to the fuel cell 4 meets the temperature requirement of the fuel cell 4.

[0063] Preferably, when a heat exchanger is used in the cooling device 12, the first heat exchange chamber of the heat exchanger is connected to the first branch 10, and the second heat exchange chamber of the heat exchanger is connected to the part of the main pipeline located between the interface of the branch pipeline and the ammonia source 1, so as to increase the temperature of the ammonia supplied from the ammonia source 1 to the first cracker 2 and the second cracker 3 by the heat of the mixed gas in the first heat exchange chamber, thereby facilitating the cracking of the ammonia.

[0064] In some embodiments, the power generation system of the embodiment of the present invention also includes a boost pump 13, a pressure stabilizing tank 14 and a nozzle 15, and the boost pump 13, the pressure stabilizing tank 14 and the nozzle 15 are connected between the ammonia adsorption device 7 and the inlet end of the fuel cell 4, and are arranged in sequence from the ammonia adsorption device 7 to the inlet end of the fuel cell 4.

[0065] like Figure 1 As shown, the main pipeline is also provided with a booster pump 13, a pressure stabilizing tank 14 and a nozzle 15, which are arranged between the ammonia adsorption device 7 and the fuel cell 4 and arranged in sequence along the flow direction of the gas in the main pipeline.

[0066] The mixed gas adsorbed by the ammonia adsorption device 7 is firstly pressurized by the booster pump 13, then supplied to the pressure stabilizing tank 14 for pressure stabilization storage, and then supplied to the fuel cell 4 through the nozzle 15 for power generation.

[0067] Preferably, the main line is further provided with a check valve 9 between the ammonia adsorption device 7 and the booster pump 13 to prevent gas backflow. The main line is also provided with a control valve 6 between the surge tank 14 and the nozzle 15 to control whether the surge tank 14 releases the stored ammonia.

[0068] In some embodiments, the power generation system of the embodiment of the present invention also includes a driving pump 16, an evaporator 17 and a foreign gas adsorption device 18. The driving pump 16, the evaporator 17 and the foreign gas adsorption device 18 are connected between the ammonia source 1 and the first cracker 2 and the second cracker 3 connected in parallel, and are arranged in sequence along the flow direction of ammonia supplied by the ammonia source 1. The foreign gas adsorption device 18 is used to adsorb and remove gases other than ammonia.

[0069] As Figure 1 shown, the main pipeline is further provided with a driving pump 16, an evaporator 17 and a miscellaneous gas adsorption device 18. The driving pump 16, the evaporator 17 and the miscellaneous gas adsorption device 18 are arranged between the ammonia source 1 and the interface of the branch pipeline, and are arranged in sequence along the flow direction of the gas in the main pipeline.

[0070] The ammonia source 1 is preferably a liquid ammonia storage tank. The ammonia gas released from the liquid ammonia storage tank flows under the drive of the driving pump 16, then passes through the evaporator 17 and is evaporated, and then passes through the miscellaneous gas adsorption device 18. The miscellaneous gas adsorption device 18 is preferably an adsorption tower for adsorbing and removing other impurity gases in the ammonia gas. After the impurity gases are adsorbed and removed from the ammonia gas, the ammonia gas is supplied to the first cracker 2 and / or the second cracker 3.

[0071] Preferably, the main pipeline is further provided with a control valve 6 between the ammonia source 1 and the driving pump 16 to control whether the ammonia source 1 releases ammonia gas.

[0072] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for distinction and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0073] In the present invention, unless otherwise clearly defined and limited, the terms such as "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is at a higher level than the second feature in terms of horizontal height. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is at a lower level than the second feature in terms of horizontal height.

[0075] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0076] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A power generation system, characterized in that: include: An ammonia source (1), a first cracker (2), a second cracker (3) and a fuel cell (4), wherein the first cracker (2) and the second cracker (3) are connected in parallel to the outlet of the ammonia source (1), the first cracker (2) is used to generate heat under electric drive and to crack the ammonia provided by the ammonia source (1), the first cracker (2) is connected to the second cracker (3) to supply the mixed gas generated after cracking to the second cracker (3), the second cracker (3) is used to burn the mixed gas to generate heat and to crack the ammonia provided by the ammonia source (1), and the second cracker (3) is connected to the inlet end of the fuel cell (4) to supply the mixed gas generated after cracking to the fuel cell (4) to generate electricity.

2. The power generation system according to claim 1, characterized in that: It also includes a battery (5), which is connected between the power output end of the fuel cell (4) and the first cracker (2), and the battery (5) is used to receive and store part of the power generated by the fuel cell (4) and to supply the stored power to the first cracker (2).

3. The power generation system according to claim 1, characterized in that: A control valve (6) is provided at one end of the first cracker (2) connected to the ammonia source (1) and at one end of the second cracker (3) connected to the ammonia source (1).

4. The power generation system according to claim 1, characterized in that: The outlet end of the fuel cell (4) is connected to the second cracker (3) so as to supply the mixed gas remaining after power generation to the second cracker (3).

5. The power generation system according to claim 4, characterized in that: The second crackers (3) are at least two connected in series between the ammonia source (1) and the inlet end of the fuel cell (4), and each of the second crackers (3) is connected to the outlet end of the first cracker (2) and the fuel cell (4).

6. The power generation system according to claim 5, characterized in that: It also includes an ammonia adsorption device (7), which is connected between the inlet end of the fuel cell (4) and the second cracker (3) closest to the upstream of the fuel cell (4), and is used to adsorb and remove ammonia in the mixed gas supplied to the fuel cell (4).

7. The power generation system according to claim 6, characterized in that: The ammonia adsorption device (7) is connected to the mixed gas inlet of the second cracker (3) to supply part of the mixed gas to the second cracker (3).

8. The power generation system according to claim 7, characterized in that: The invention also comprises a mixed gas supply pipeline (8), wherein the mixed gas supply pipeline (8) comprises a first inlet branch (81), a second inlet branch (82), a third inlet branch (83) and at least two outlet branches (84), wherein the first inlet branch (81) is connected to the first cracker (2), the second inlet branch (82) is connected to the outlet end of the fuel cell (4), the third inlet branch (83) is connected to the ammonia adsorption device (7), and the outlet branch (84) is connected to the second cracker (3) in a one-to-one correspondence, the first inlet branch (81) and the third inlet branch (83) are provided with a control valve (6), and the second inlet branch (82) and the outlet branch (84) are both provided with a check valve (9).

9. The power generation system according to claim 6, characterized in that: The invention also comprises a first branch (10), a second branch (11) and a cooling device (12); the first branch (10) and the second branch (11) are connected in parallel between the ammonia adsorption device (7) and the second cracker (3) which is closest to the upstream of the ammonia adsorption device (7); the first branch (10) is provided with the cooling device (12), and the second branch (11) is provided with a control valve (6).

10. The power generation system according to claim 6, characterized in that: It also includes a boost pump (13), a pressure stabilizing tank (14) and a nozzle (15), wherein the boost pump (13), the pressure stabilizing tank (14) and the nozzle (15) are connected between the ammonia adsorption device (7) and the inlet end of the fuel cell (4), and are arranged in sequence from the ammonia adsorption device (7) to the inlet end of the fuel cell (4); and / or The power generation system further comprises a driving pump (16), an evaporator (17) and a foreign gas adsorption device (18). The driving pump (16), the evaporator (17) and the foreign gas adsorption device (18) are connected between the ammonia source (1) and the first cracker (2) and the second cracker (3) connected in parallel, and are arranged in sequence along the flow direction of ammonia supplied by the ammonia source (1). The foreign gas adsorption device (18) is used to adsorb and remove gases other than ammonia.

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