Comprehensive heat treatment system integrating hydrogen production, storage and utilization

Abstract

The utility model discloses a comprehensive heat treatment system integrating hydrogen production, storage and utilization. The comprehensive heat treatment system comprises a heat exchange loop II, a cooling loop III, a heating loop I, a tail discharge-hydrogen production cycle IV and a tail discharge water purification and utilization cycle V, through a heat exchange loop II, the heat generated by the water electrolysis hydrogen production device and the heat brought out by the tail row of the hydrogen fuel cell stack are respectively sent to a refrigeration device for heat exchange through a second plate heat exchanger and a first plate heat exchanger; when the cold energy of the cold storage device on the cooling loop III is residual, the residual cold energy is stored in the cold storage device to be called at any time; the heating loop I is used for heating through a third plate heat exchanger, a heat storage device is mounted on a bypass, and when excessive heat exists, the heat is stored in the heat storage device and called at any time; hydrogen production and utilization of electrolyzed water discharged from the tail of the hydrogen fuel cell stack are carried out through a tail discharge-hydrogen production cycle IV, and purification and cyclic utilization of tail discharged water of the hydrogen fuel cell stack are carried out through a tail discharged water purification and utilization cycle V; the device has the advantages of being reasonable in structural arrangement, high in hydrogen production-storage-use efficiency and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen storage power generation, and in particular to a comprehensive heat treatment system integrating production, storage and use of hydrogen. Background Art

[0002] At present, when solid-state hydrogen storage refrigeration warehouses release hydrogen, they usually use external electrical energy or thermal energy alone for hot start, which cannot achieve the rational allocation and utilization of energy. This not only causes energy waste, but also makes the overall control plan cumbersome and unreasonable. Directly using the cooling water of the fuel cell to heat the solid-state hydrogen storage will cause the cooling water of the fuel cell to produce ions, requiring an additional deionizer, which increases the processing cost and complexity. In addition, the existing hydrogen production and storage technology is not mature enough to solve the refrigeration problem during the hydrogen storage and absorption process.

[0003] A green electricity water electrolysis hydrogen production and solid-state hydrogen storage power generation, oxygen and heating device with authorization number CN218642846U introduces a system that uses fuel cell cooling water to heat solid-state hydrogen storage, including a green power generation module, an energy storage module, a water electrolysis hydrogen production device, a hydrogen storage device and a fuel cell; the green power generation module is connected to the energy storage module, the energy storage module is connected to the water electrolysis hydrogen production device, the oxygen outlet of the water electrolysis hydrogen production device is connected to the oxygen transmission pipeline, and the hydrogen outlet of the water electrolysis hydrogen production device is connected to the hydrogen storage device through a first hydrogen transmission pipeline; the outlet of the hydrogen storage tank body inside the hydrogen storage device is connected to the fuel cell through a second hydrogen transmission pipeline; the fuel cell is connected to the energy storage module through an electric power transmission line, and the fuel cell is also connected to the heat exchange device through a first heat exchange circulation pipeline, and the heat exchange device is connected to a closed heat exchange chamber outside the hydrogen storage tank body in the hydrogen storage device through a second heat exchange circulation pipeline. The utility model can realize the trigeneration of power supply, heat supply and oxygen supply, and can make full use of the waste heat to avoid waste; however, since the fuel cell is sensitive to temperature, this patent may affect the control accuracy of the fuel cell, and it lacks the technical means to solve the problem of solid-state hydrogen storage and hydrogen absorption refrigeration. Summary of the invention

[0004] In order to overcome the problems existing in the above-mentioned prior art, the utility model provides an integrated heat treatment system for hydrogen production, storage and use, in which a heat storage device is added to the heating circuit, which can improve the response speed of temperature control and ensure the stability of operation; when the hydrogen fuel cell stack is started at low temperature, the fuel cell can also be preheated; at the same time, the tail exhaust waste heat and tail water of the hydrogen fuel cell stack are recycled, and the waste heat inside the entire system is reasonably utilized, while solving the problem of refrigeration required when solid-state hydrogen storage absorbs hydrogen.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A comprehensive heat treatment system for integrated production, storage and use of hydrogen comprises a heat exchange loop II, a cooling loop III, a heating loop I, a tail drain-hydrogen production cycle IV and a tail drain purification and utilization cycle V; the heat source of the heat exchange loop II comes from the tail drain purification and utilization cycle V and the tail drain hot water of the hydrogen fuel cell stack, a part of which is used as the feed water of the tail drain purification and utilization cycle V after heat exchange, and the other part enters the cooling loop III to generate cold energy for hydrogen storage refrigeration, and the excess cold energy is stored for future use; the cooling water of the hydrogen fuel cell stack is heated by the heating loop I and used for hydrogen release, and the excess heat is stored for future use; the tail drain of the hydrogen fuel cell stack is purified by the tail drain-hydrogen production cycle IV and used for hydrogen production, and is supplied to the hydrogen fuel cell stack, and tail drain is generated again after the reaction and enters the tail drain-hydrogen production cycle IV for use.

[0007] The heat exchange loop II includes a first plate heat exchanger 19 installed at the tail outlet of the hydrogen fuel cell stack 42. The hot flow outlet end of the first plate heat exchanger 19 is connected to the hot flow inlet end of the second plate heat exchanger 13 through the first expansion water tank 21, the heat absorber of the heat absorption refrigeration device 22 and the first water pump 23 in sequence for heat exchange; the cold flow outlet end of the second plate heat exchanger 13 is connected to the cold flow inlet end of the first plate heat exchanger 19; the first expansion water tank 21 is also provided with a first drain port, and a first drain electric valve 20 is set at the outlet of the first drain port, and a first pressure measuring device 38 is provided between the first drain electric valve 20 and the first drain port.

[0008] The cooling circuit III includes an endothermic refrigeration device 22, and the heat absorbed by the heat absorber of the endothermic refrigeration device 22 is processed by the refrigeration generator of the endothermic refrigeration device 22 to generate cold. The cold flow outlet end of the refrigeration generator of the endothermic refrigeration device 22 is connected to the cold flow inlet end of the cold storage device 25 through the cold storage device inlet stop valve 24, and the cold flow outlet end of the cold storage device 25 is connected to the coolant inlet 2-1 of the solid-state hydrogen storage refrigeration warehouse 8 through the eighth electric valve 26, the ninth electric valve 27, the fifth stop valve 28 and the fourth water pump 29 in sequence, the coolant outlet 2-2 of the solid-state hydrogen storage refrigeration warehouse 8 is connected to the inlet of the second expansion water tank 33, and the outlet of the second expansion water tank 33 is connected to the inlet of the refrigeration generator of the endothermic refrigeration device 22; the second expansion water tank 33 is also provided with a third emptying electric valve 32.

[0009] A first electric valve 30 and a first stop valve 31 are connected in series between the coolant outlet 2 - 2 and the inlet of the second expansion water tank 33 .

[0010] The heating circuit I includes a third plate heat exchanger 1 installed at the cooling water outlet end of the hydrogen fuel cell stack 42, the water outlet of the third plate heat exchanger 1 is connected to the water inlet of the second water pump 2, and the water outlet of the second water pump 2 is divided into a main path and a bypass, wherein a second electric valve 6 is installed on the main path, and both ends of the second electric valve 6 are connected to the bypass, and the third electric valve 3, the heat storage device 4 and the second stop valve 5 are connected in series on the bypass in sequence, and the water outlet of the second stop valve 5 merges with the water outlet of the second electric valve 6 and is connected to the inlet end of the third stop valve 7, and the outlet end of the third stop valve 7 is connected to the heat exchange chamber inlet 1-2 of the solid-state hydrogen storage refrigeration warehouse 8, and the heat exchange chamber outlet 1-1 of the solid-state hydrogen storage refrigeration warehouse 8 is connected to the water inlet of the third expansion water tank 12 through the fourth electric valve 9 and the fourth stop valve 10, and the water outlet of the third expansion water tank 12 is connected to the water inlet of the third plate heat exchanger 1.

[0011] The third expansion water tank 12 of the heating circuit I is provided with a second drain port, a second drain electric valve 11 is arranged at the outlet of the second drain port, and a second pressure measuring device 37 is arranged between the second drain electric valve 11 and the second drain port; a fifth electric valve 40 is also connected between the water outlet of the third expansion water tank 12 and the outlet end of the second electric valve 6.

[0012] The solid-state hydrogen storage refrigeration warehouse 8 is provided with a hydrogen inlet and outlet, a solid-state hydrogen storage hydrogen pressure detection device 39 is provided at the hydrogen inlet and outlet, a first solid-state hydrogen storage temperature detector 35 is provided at the hydrogen inlet and outlet end, and a second solid-state hydrogen storage temperature detector 36 is provided at the coolant outlet 2-2 end.

[0013] The tail exhaust-hydrogen production cycle IV includes a hydrogen fuel cell stack 42, the tail exhaust steam-water outlet of the hydrogen fuel cell stack 42 is connected to the tail exhaust steam-water inlet of the first plate heat exchanger 19, the tail exhaust steam-water outlet of the first plate heat exchanger 19 is connected to the water inlet of the purified water tank 14 through the steam-water separator 18, the water outlet of the purified water tank 14 is connected to the water inlet of the electrolytic water hydrogen production device 41 through the sixth electric valve 16 and the third water pump 17 in turn, and the hydrogen outlet of the electrolytic water hydrogen production device 41 is connected to the hydrogen inlet of the hydrogen fuel cell stack 42 and the hydrogen inlet of the solid-state hydrogen storage refrigeration warehouse 8 through the seventh electric valve 34.

[0014] In the tail water purification and utilization cycle V, the electrolyte outlet of the water electrolysis hydrogen production device 41 is connected to the electrolyte inlet of the purified water tank 14 through the second plate heat exchanger 13, and the water outlet of the purified water tank 14 is connected in sequence through the sixth electric valve 16, the third water pump 17 and the water inlet of the water electrolysis hydrogen production device 41.

[0015] The purified water tank 14 is also provided with a purified water replenishment inlet electric valve 15 .

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. Through the heat exchange circuit II, the heat generated by the water electrolysis hydrogen production device 41 and the heat brought out by the tail exhaust of the hydrogen fuel cell stack 42 are respectively sent to the refrigeration device 22 for heat exchange through the second plate heat exchanger 13 and the first plate heat exchanger 19; the refrigeration device 22 converts the heat into a cold source and cools the solid hydrogen storage refrigeration warehouse 8 through the cooling circuit III; when there is surplus cold energy, the cold storage device 25 on the cooling circuit III stores the surplus cold energy in the cold storage device for use at any time, which has a reasonable structure and is easy to operate.

[0018] 2. Install a third plate heat exchanger 1 at the cooling water outlet of the hydrogen fuel cell stack 42 through the heating circuit I, and send the heat to the solid hydrogen storage refrigeration warehouse 8 for heating through the pipeline valve of the main line. At the same time, notify the heat storage device 4 installed on the bypass. When there is excess heat, the heat is stored in the heat storage device 4 and can be called at any time, which improves the response speed of temperature control, ensures the stable operation of solid hydrogen storage dehydrogenation, improves work efficiency, and reduces operating costs.

[0019] 3. When the fuel cell is started at low temperature, the third plate heat exchanger 1 is heated by starting the fourth electric valve 40 on the bypass in the heating circuit I. When the temperature of the fuel cell reaches the operating temperature, the fourth electric valve 40 is closed to enter a cycle of heating the solid-state hydrogen storage; the problem of low-temperature cold start of the fuel cell is solved and the efficiency is improved.

[0020] 4. The tail discharge of the hydrogen fuel cell stack is used for hydrogen production by electrolyzing water through the tail discharge-hydrogen production cycle IV, and the tail discharge of the hydrogen fuel cell stack is used for purification and recycling through the tail discharge purification and utilization cycle V. In addition, while utilizing the tail discharge, the water in the purified water tank 14 can be cooled to reduce the cooling pressure of the system.

[0021] In summary, the utility model realizes the integration of hydrogen production, storage and use, solves the problem that solid-state hydrogen storage needs to be equipped with an additional heat treatment system for hydrogen absorption and heat release and dehydrogenation heating, simplifies the system and reduces the floor space; at the same time, it overcomes the problem of unstable temperature control in the prior art, and fully recycles the tail exhaust of the hydrogen fuel cell stack, which is energy-saving and environmentally friendly and avoids waste; it has the advantages of reasonable structural setting, high efficiency of hydrogen production, storage and use, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is described in detail through the following embodiments in conjunction with the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the structure of the utility model.

[0024] In the figure: 1, the third plate heat exchanger; 2, the second water pump; 3, the third electric valve; 4, the heat storage device; 5, the second stop valve; 6, the second electric valve; 7, the third stop valve; 8, the solid hydrogen storage refrigeration warehouse; 9, the fourth electric valve; 10, the fourth stop valve; 11, the second emptying electric valve; 12, the third expansion water tank; 13, the second plate heat exchanger; 14, the purified water tank; 15, the purified water replenishment inlet electric valve; 16, the sixth electric valve; 17, the third water pump; 18, the steam-water separator; 19, the first plate heat exchanger; 20, the first emptying electric valve; 21, the first expansion water tank; 22, the heat absorption refrigeration device; 23, the first water pump; 24, the cold storage device inlet stop valve Check valve; 25. Cold storage device; 26. Eighth electric valve; 27. Ninth electric valve; 28. Fifth stop valve; 29. ​​Fourth water pump; 30. First electric valve; 31. First stop valve; 32. Third drain electric valve; 33. Second expansion water tank; 34. Seventh electric valve; 35. First solid-state hydrogen storage thermometer; 36. Second solid-state hydrogen storage thermometer; 37. Second pressure measuring device; 38. First pressure measuring device; 39. Solid-state hydrogen storage hydrogen pressure detection device; 40. Fifth electric valve; 41. Water electrolysis hydrogen production device; 42. Hydrogen fuel cell stack; 1-1. Heat exchange chamber outlet; 1-2. Heat exchange chamber inlet; 2-1. Coolant inlet; 2-2. Coolant outlet. Specific implementation plan

[0025] The embodiment of the utility model provides an integrated heat treatment system for hydrogen production, storage and use, including a heat exchange loop II, a cooling loop III, a heating loop I, a tail exhaust-hydrogen production cycle IV and a tail exhaust water purification and utilization cycle V; including a heat exchange loop II, a cooling loop III, a heating loop I, a tail exhaust-hydrogen production cycle IV and a tail exhaust water purification and utilization cycle V; the heat source of the heat exchange loop II comes from the tail exhaust water purification and utilization cycle V and the tail exhaust hot water of the hydrogen fuel cell stack, a part of which is used as the feed water of the tail exhaust water purification and utilization cycle V after heat exchange, and the other part enters the cooling loop III to generate cold energy for hydrogen storage and refrigeration, and the excess cold energy is stored for future use; the cooling water of the hydrogen fuel cell stack is heated by the heating loop I and used for hydrogen release, and the excess heat is stored for future use, the tail exhaust-hydrogen production cycle IV purifies the tail exhaust water of the hydrogen fuel cell stack and uses it for hydrogen production, and supplies it to the hydrogen fuel cell stack, and after the reaction, the tail exhaust water is generated again and enters the tail exhaust-hydrogen production cycle IV for use.

[0026] The heat exchange loop II includes a first plate heat exchanger 19 installed at the tail outlet of the hydrogen fuel cell stack 42. The hot flow outlet end of the first plate heat exchanger 19 is connected to the hot flow inlet end of the second plate heat exchanger 13 through the first expansion water tank 21, the heat absorber of the heat absorption refrigeration device 22 and the first water pump 23 in sequence for heat exchange; the cold flow outlet end of the second plate heat exchanger 13 is connected to the cold flow inlet end of the first plate heat exchanger 19 to form a closed heat exchange loop I; the first expansion water tank 21 is also provided with a first drain port, and a first drain electric valve 20 is set at the outlet of the first drain port, and a first pressure measuring device 38 is provided between the first drain electric valve 20 and the first drain port.

[0027] The cooling circuit III includes an endothermic refrigeration device 22, and the heat absorbed by the heat absorber of the endothermic refrigeration device 22 is processed by the refrigeration generator of the endothermic refrigeration device 22 to generate cold. The cold flow outlet end of the refrigeration generator of the endothermic refrigeration device 22 is connected to the cold flow inlet end of the cold storage device 25 through the cold storage device inlet stop valve 24, and the cold flow outlet end of the cold storage device 25 is connected to the coolant inlet 2-1 of the solid-state hydrogen storage refrigeration warehouse 8 through the eighth electric valve 26, the ninth electric valve 27, the fifth stop valve 28 and the fourth water pump 29 in sequence. The coolant outlet 2-2 of the solid-state hydrogen storage refrigeration warehouse 8 is connected to the inlet of the second expansion water tank 33, and the outlet of the second expansion water tank 33 is connected to the inlet of the refrigeration generator of the endothermic refrigeration device 22, forming a closed cooling circuit III, and the second expansion water tank 33 is also provided with a third emptying electric valve 32.

[0028] A first electric valve 30 and a first stop valve 31 are connected in series between the coolant outlet 2 - 2 and the inlet of the second expansion water tank 33 .

[0029] The heating circuit I includes a third plate heat exchanger 1 installed at the cooling water outlet end of the hydrogen fuel cell stack 42, the water outlet of the third plate heat exchanger 1 is connected to the water inlet of the second water pump 2, and the water outlet of the second water pump 2 is divided into a main path and a bypass, wherein a second electric valve 6 is installed on the main path, and both ends of the second electric valve 6 are connected to the bypass, and the third electric valve 3, the heat storage device 4 and the second stop valve 5 are connected in series on the bypass in sequence, and the water outlet of the second stop valve 5 merges with the water outlet of the second electric valve 6 and is connected to the inlet end of the third stop valve 7, and the outlet end of the third stop valve 7 is connected to the heat exchange chamber inlet 1-2 of the solid-state hydrogen storage refrigeration warehouse 8, and the heat exchange chamber outlet 1-1 of the solid-state hydrogen storage refrigeration warehouse 8 is connected to the water inlet of the third expansion water tank 12 through the fourth electric valve 9 and the fourth stop valve 10, and the water outlet of the third expansion water tank 12 is connected to the water inlet of the third heat exchanger 1, so as to form a closed heating circuit I.

[0030] The third expansion water tank 12 of the heating circuit I is provided with a second drain port, a second drain electric valve 11 is arranged at the outlet of the second drain port, and a second pressure measuring device 37 is arranged between the second drain electric valve 11 and the second drain port; a fifth electric valve 40 is also connected between the water outlet of the third expansion water tank 12 and the outlet end of the first electric valve 6.

[0031] The solid-state hydrogen storage refrigeration warehouse 8 is provided with a hydrogen inlet and outlet, a solid-state hydrogen storage hydrogen pressure detection device 39 is provided at the hydrogen inlet and outlet, a first solid-state hydrogen storage temperature detector 35 is provided at the hydrogen inlet and outlet end, and a second solid-state hydrogen storage temperature detector 36 is provided at the coolant outlet 2-2 end.

[0032] The tail exhaust-hydrogen production cycle IV includes a hydrogen fuel cell stack 42, the tail exhaust steam-water outlet of the hydrogen fuel cell stack 42 is connected to the tail exhaust steam-water inlet of the first plate heat exchanger 19, the tail exhaust steam-water outlet of the first plate heat exchanger 19 is connected to the water inlet of the purified water tank 14 through the steam-water separator 18, the water outlet of the purified water tank 14 is connected to the water inlet of the electrolytic water hydrogen production device 41 through the sixth electric valve 16 and the third water pump 17 in sequence, the hydrogen outlet of the electrolytic water hydrogen production device 41 is connected to the hydrogen inlet of the hydrogen fuel cell stack 42 and the hydrogen inlet of the solid-state hydrogen storage refrigeration warehouse 8 through the seventh electric valve 34, forming a tail exhaust-hydrogen production cycle IV.

[0033] In the tail water purification and utilization cycle V, the electrolyte outlet of the water electrolysis hydrogen production device 41 is connected to the electrolyte inlet of the purified water tank 14 through the second plate heat exchanger 13, and the water outlet of the purified water tank 14 is connected to the water inlet of the water electrolysis hydrogen production device 41 through the sixth electric valve 16, the third water pump 17 and the water inlet of the water electrolysis hydrogen production device 41 in sequence, forming a tail water purification and utilization cycle V.

[0034] The purified water tank 14 is also provided with a purified water replenishment inlet electric valve 15 .

[0035] The working principle of the utility model is:

[0036] The hot water produced by the water electrolysis hydrogen production device 41 flows through the second plate heat exchanger 13 and becomes cold water. It is pumped into the purified water tank 14 through the third water pump 17 and then flows back to the water electrolysis hydrogen production device 41 through the pipeline to form the tail water purification and utilization cycle V. The whole process transfers heat to the heat exchange loop II. The heat of the heat exchange loop II comes from two parts. In addition to the tail water purification and utilization cycle V, the other part comes from the tail water hot water of the fuel cell. The tail water hot water flows through the first plate heat exchanger 19 and becomes low-temperature water. After passing through the steam-water separator 18, the gas is emptied and the liquid flows into the purified water tank 14 as the feed water for the water electrolysis hydrogen production. The water in the heat exchange loop II is pumped out from the first expansion water tank 21 by the first water pump 23, and then flows through the first plate heat exchanger 19 and the second plate heat exchanger 13. After being heated twice, it becomes high-temperature water. After flowing through the heat absorption refrigeration device 22, it becomes low-temperature water and flows into the first expansion water tank 21 again to form a loop for steady flow and pressure. The heat obtained above is converted into cold through the heat absorption refrigeration device 22, and the cooling is sent to the solid hydrogen storage refrigeration warehouse 8 through the cooling circuit III. The fourth water pump 29 sends the water in the second expansion water tank 33 into the heat absorption refrigeration device 22, and after cooling, the cold water is output, and then flows through two branches, one of which is equipped with a cold storage device 25. When there is excess cold, it is stored for future use, which increases the accuracy and stability of the regulation and avoids energy waste. After the two branches converge, the cold water enters the device through the cooling water inlet 2-1 of the solid hydrogen storage refrigeration warehouse 8 for heat exchange, and hot water flows out from the outlet 2-2, and finally flows into the second expansion water tank 33 to form a loop. At this point, the cooling process of the solid hydrogen storage refrigeration warehouse 8 during hydrogenation is realized.

[0037] Hydrogenation and dehydrogenation of solid-state hydrogen storage are two opposite processes, so solid-state hydrogen storage requires external heating when dehydrogenating to release hydrogen better and more stably. Therefore, when the fuel cell is running, the cooling water (hot water) of the fuel cell is used to heat the solid-state hydrogen storage refrigeration warehouse 8 to dehydrogenate. In the heating circuit I, the second water pump 2 sends the water in the third expansion water tank 12 into the third plate heat exchanger 1 for heating, and the cold water becomes hot water, and then it is divided into two branches, one of which is equipped with a heat storage device 4, which is stored when there is excess heat for future use, thereby increasing the accuracy and stability of the regulation and avoiding energy waste. After the two branches merge, the hot water enters the device through the heat exchange chamber inlet 1-2 of the solid-state hydrogen storage refrigeration warehouse 8 for heat exchange, and the cold water flows out from the outlet 1-1, and then flows into the third expansion water tank 12 to form a loop. At this point, the heating process of the solid-state hydrogen storage refrigeration warehouse 8 when dehydrogenating is realized. The utility model adds a bypass in the heating circuit I, and a fifth electric valve 40 is installed in the bypass. When the fuel cell is started at low temperature, the second water pump 2, the third electric valve 3 and the fifth electric valve 40 are opened. When the temperature of the fuel cell reaches the operable temperature, the fifth electric valve 40 is closed to enter a cycle process of heating the solid hydrogen storage.

[0038] When the electrolytic water hydrogen production device is in operation, as heat is continuously generated during the hydrogen production process, hot water is running in the heat exchange loop II. The function of the first expansion water tank 21 is to stabilize the pressure and flow. When the pressure measured by the first pressure measuring device 38 is higher than the set value, the first emptying electric valve 20 is opened to exhaust and reduce the pressure. Cold water flows through the second expansion water tank 33, and the third emptying electric valve 32 is opened regularly to exhaust. Under certain working conditions, when the cold capacity is greater than the defined value, the cold capacity is stored in the cold storage device 25 by adjusting the opening of the eighth electric valve 26 and the ninth electric valve 27, and can be called at any time in later use to ensure the accuracy and stability of temperature control; under certain working conditions, the main road temperature of the cooling loop III cannot meet the temperature of hydrogen absorption. By opening the eighth electric valve 26, the cold capacity stored in the cold storage device 25 is called out, the cooling capacity of the solid hydrogen storage refrigeration warehouse 8 is increased, and the rate of hydrogenation is ensured.

[0039] When the hydrogen production equipment stops running, the system simultaneously shuts down the heat exchange loop II and the cooling loop III, that is, shuts down the first water pump 23, the fourth water pump 29, closes the eighth electric valve 26, the ninth electric valve 27 and the first electric valve 30, and shuts down the heat absorption refrigeration device 22.

[0040] When the heating circuit I is turned on, the second electric valve 6 and the fourth electric valve 9 are first opened, and then the second water pump 2 is started. When the heating temperature is too high, the third electric valve 3 is opened, and the excess heat is stored in the heat storage device 4 by adjusting its opening, so that it can be called at any time; when the second electric valve 6 is fully opened, the release rate of the solid hydrogen storage refrigeration warehouse 8 cannot meet the consumption of the hydrogen fuel cell stack, and the third electric valve 3 needs to be opened at this time to call the energy stored in the heat storage device 4; when the temperature in the heating circuit I fluctuates greatly, the opening of the third electric valve 3 is adjusted for adjustment; the third expansion water tank 12 is mainly used for the voltage and flow stabilization of the heating circuit I, and the heating circuit I is exhausted regularly. A pressure measuring device is installed in the box, and when the pressure is greater than the set value, the second electric drain valve 11 is automatically opened for discharge.

[0041] When the hydrogen fuel cell stack is started at low temperature, the second water pump 2 and the third electric valve 3 and the fifth electric valve 40 are turned on. When the temperature of the fuel cell reaches the operating temperature, the fifth electric valve 40 is closed and the heating circuit I of the solid-state hydrogen storage is started. When the fuel cell is started at low temperature, the second water pump 2 and the third electric valve 3 and the fifth electric valve 40 are turned on. When the temperature of the fuel cell reaches the operating temperature, the fifth electric valve 40 is closed to enter a cycle of heating the solid-state hydrogen storage.

[0042] The tail water of the tail water purification utilization cycle V passes through the first plate heat exchanger 19, passes through the steam-water separator 18, flows into the purified water tank 14, and circulates through the third water pump 17 to provide electrolytic water for hydrogen production. The tail water-hydrogen production cycle IV produces hydrogen through the electrolytic water hydrogen production device 41 and sends it to the hydrogen fuel cell stack 42 and the solid-state hydrogen storage refrigeration warehouse 8 for utilization and storage; the purified water replenishment port electric valve 15 replenishes water for the external purified water replenishment port.

Claims

1. A comprehensive heat treatment system integrating hydrogen production, storage and use, characterized in that: It includes a heat exchange loop II, a cooling loop III, a heating loop I, a tail exhaust-hydrogen production cycle IV and a tail exhaust water purification and utilization cycle V; the heat source of the heat exchange loop II comes from the tail exhaust water purification and utilization cycle V and the tail exhaust hot water of the hydrogen fuel cell stack. After heat exchange, a part of it is used as the feed water of the tail exhaust water purification and utilization cycle V, and the other part enters the cooling loop III to generate cold energy for hydrogen storage refrigeration, and the excess cold energy is stored for future use; the cooling water of the hydrogen fuel cell stack is heated by the heating loop I and used for hydrogen release, and the excess heat is stored for future use; the tail exhaust-hydrogen production cycle IV purifies the tail exhaust water of the hydrogen fuel cell stack and uses it for hydrogen production, and supplies it to the hydrogen fuel cell stack. After the reaction, tail exhaust water is generated again and enters the tail exhaust-hydrogen production cycle IV for use.

2. The integrated heat treatment system for hydrogen production, storage and use according to claim 1, characterized in that: The heat exchange loop II comprises a first plate heat exchanger (19) installed at the tail outlet of the hydrogen fuel cell stack (42); the hot flow outlet of the first plate heat exchanger (19) is connected to the hot flow inlet of the second plate heat exchanger (13) through a first expansion water tank (21), a heat absorber of a heat absorption refrigeration device (22) and a first water pump (23) in sequence for heat exchange; the cold flow outlet of the second plate heat exchanger (13) is connected to the cold flow inlet of the first plate heat exchanger (19); the first expansion water tank (21) is also provided with a first drain port, a first drain electric valve (20) is provided at the outlet of the first drain port, and a first pressure measuring device (38) is provided between the first drain electric valve (20) and the first drain port.

3. The integrated heat treatment system for hydrogen production, storage and use according to claim 1, characterized in that: The cooling circuit III comprises a heat absorption refrigeration device (22); the heat absorbed by the heat absorber of the heat absorption refrigeration device (22) is processed by the refrigeration generator of the heat absorption refrigeration device (22) to generate cold; the cold flow outlet end of the refrigeration generator of the heat absorption refrigeration device (22) is connected to the cold flow inlet end of the cold storage device (25) through the cold storage device inlet stop valve (24); the cold flow outlet end of the cold storage device (25) is connected to the coolant inlet (2-1) of the solid hydrogen storage refrigeration warehouse (8) through the eighth electric valve (26), the ninth electric valve (27), the fifth stop valve (28) and the fourth water pump (29) in sequence; the coolant outlet (2-2) of the solid hydrogen storage refrigeration warehouse (8) is connected to the inlet of the second expansion water tank (33); the outlet of the second expansion water tank (33) is connected to the inlet of the refrigeration generator of the heat absorption refrigeration device (22); the second expansion water tank (33) is also provided with a third emptying electric valve (32).

4. The integrated heat treatment system for hydrogen production, storage and use according to claim 3, characterized in that: A first electric valve (30) and a first stop valve (31) are sequentially connected in series between the coolant outlet (2-2) and the inlet of the second expansion water tank (33).

5. The integrated heat treatment system for hydrogen production, storage and use according to claim 1, characterized in that: The heating circuit I comprises a third plate heat exchanger (1) installed at the cooling water outlet end of the hydrogen fuel cell stack (42), the water outlet of the third plate heat exchanger (1) is connected to the water inlet of the second water pump (2), the water outlet of the second water pump (2) is divided into a main path and a bypass, wherein a second electric valve (6) is installed on the main path, both ends of the second electric valve (6) are connected to the bypass, and the third electric valve (3), the heat storage device (4) and the second stop valve (5) are connected in series in sequence on the bypass, and the second stop valve (5) The water outlet of the third expansion water tank (12) is connected to the water outlet of the second electric valve (6) and the inlet of the third stop valve (7); the outlet of the third stop valve (7) is connected to the heat exchange chamber inlet (1-2) of the solid hydrogen storage refrigeration warehouse (8); the heat exchange chamber outlet (1-1) of the solid hydrogen storage refrigeration warehouse (8) is connected to the water inlet of the third expansion water tank (12) through the fourth electric valve (9) and the fourth stop valve (10); the water outlet of the third expansion water tank (12) is connected to the water inlet of the third plate heat exchanger (1).

6. The integrated heat treatment system for hydrogen production, storage and use according to claim 5, characterized in that: The third expansion water tank (12) of the heating circuit I is provided with a second drain port, a second drain electric valve (11) is arranged at the outlet of the second drain port, and a second pressure measuring device (37) is arranged between the second drain electric valve (11) and the second drain port; a fifth electric valve (40) is also connected between the water outlet of the third expansion water tank (12) and the outlet end of the second electric valve (6).

7. The integrated heat treatment system for hydrogen production, storage and use according to claim 3 or 5, characterized in that: The solid-state hydrogen storage refrigeration warehouse (8) is provided with a hydrogen inlet and outlet, a solid-state hydrogen storage hydrogen pressure detection device (39) is provided at the hydrogen inlet and outlet, a first solid-state hydrogen storage temperature detector (35) is provided at the hydrogen inlet and outlet end, and a second solid-state hydrogen storage temperature detector (36) is provided at the coolant outlet (2-2) end.

8. The integrated heat treatment system for hydrogen production, storage and use according to claim 1, characterized in that: The tail exhaust-hydrogen production cycle IV includes a hydrogen fuel cell stack (42), the tail exhaust steam-water outlet of the hydrogen fuel cell stack (42) is connected to the tail exhaust steam-water inlet of the first plate heat exchanger (19), the tail exhaust steam-water outlet of the first plate heat exchanger (19) is connected to the water inlet of the purified water tank (14) through the steam-water separator (18), the water outlet of the purified water tank (14) is connected to the water inlet of the electrolytic water hydrogen production device (41) through the sixth electric valve (16) and the third water pump (17) in sequence, and the hydrogen outlet of the electrolytic water hydrogen production device (41) is respectively connected to the hydrogen inlet of the hydrogen fuel cell stack (42) and the hydrogen inlet of the solid hydrogen storage refrigeration warehouse (8) through the seventh electric valve (34).

9. The integrated heat treatment system for hydrogen production, storage and use according to claim 1, characterized in that: In the tail water purification and utilization cycle V, the electrolyte outlet of the water electrolysis hydrogen production device (41) is connected to the electrolyte inlet of the purified water tank (14) through the second plate heat exchanger (13), and the water outlet of the purified water tank (14) is connected in sequence through the sixth electric valve (16), the third water pump (17) and the water inlet of the water electrolysis hydrogen production device (41).

10. A comprehensive heat treatment system for integrated production, storage and use of hydrogen according to claim 8 or 9, characterized in that: The purified water tank (14) is also provided with a purified water replenishment inlet electric valve (15).

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