A hydrogen production system for power peak regulation

Abstract

The present invention relates to a hydrogen production system for power peak regulation, comprising a hydrogen production device, a delivery pipeline and a hydrogen storage device connected in sequence, a delivery pump is provided in the delivery pipeline, the power input end of the hydrogen production device is connected to a time-varying power generation device, wherein the time-varying power generation device includes a photovoltaic power generation device and a wind power generation device, the delivery pipeline includes a hydrogen delivery main pipe and a plurality of hydrogen delivery branches, the delivery pump is provided in the hydrogen delivery main pipe, a first solenoid valve is provided in the hydrogen delivery branch pipe, a sensor for monitoring the capacity in the hydrogen storage device is provided in the hydrogen storage device, the system further comprises a controller and a plurality of first relays, each sensor is respectively connected to each signal input end of the controller, the coil of each first relay is respectively connected to each signal output end of the controller, and the contact is respectively connected to each first solenoid valve. Compared with the prior art, the present invention has the advantages of improved efficiency and safety.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage type power peak regulation, and in particular to a hydrogen production system for power peak regulation. Background Art

[0002] Electricity cannot be stored in large quantities. The generation and use of electricity are synchronized, so the power generation department must generate the same amount of electricity as required. The power load in the power system changes frequently. In order to maintain the balance of work power and keep the system frequency stable, the power generation department needs to change the output of the generator accordingly to adapt to the changes in power load, which is called power peak regulation.

[0003] Some existing technologies disclose ways to use hydrogen energy for energy storage, that is, when the power generation of uncontrollable clean energy such as wind energy and solar energy is sufficient, the excess electricity is used to produce hydrogen through methods such as water electrolysis, thereby reducing the cost of hydrogen production, and is also conducive to the popularization of the application of hydrogen fuel cells. The specific method is to allow the excess power generation of uncontrollable clean energy such as wind energy and solar energy to be transmitted to the hydrogen production station through the power grid, and the excess electricity is consumed by producing hydrogen through water electrolysis. The hydrogen produced by water electrolysis will be stored in a hydrogen storage device. When a hydrogen storage device is full, the prior art is to close the pipeline valve, replace the hydrogen storage device, and then open the pipeline valve. This method is inefficient, and in order to ensure safety, the entire pipeline and its accessories need to have a certain strength, so the cost is also relatively high. Summary of the invention

[0004] The purpose of the present invention is to provide a hydrogen production system for power peak regulation. By designing a plurality of hydrogen storage devices in parallel, the first relay is responsible for the opening and closing of the first solenoid valve. When a hydrogen storage device is full and needs to be replaced, other hydrogen storage devices can still receive the hydrogen produced by electrolysis, and there will be no blockage in the pipeline, resulting in an increase in pipeline pressure. This improves efficiency while also improving safety.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A hydrogen production system for power peak regulation comprises a hydrogen production device, a delivery pipeline and a hydrogen storage device connected in sequence, wherein a delivery pump is provided in the delivery pipeline, and an electric energy input end of the hydrogen production device is connected to a time-varying power generation device, wherein the time-varying power generation device comprises a photovoltaic power generation device and a wind power generation device, the delivery pipeline comprises a hydrogen transmission trunk pipe and a plurality of hydrogen transmission branches, the delivery pump is provided in the hydrogen transmission trunk pipe, a first solenoid valve is provided in the hydrogen transmission branch pipe, a sensor for monitoring the capacity in the hydrogen storage device is provided in the hydrogen storage device, the system further comprises a controller and a plurality of first relays, each sensor is respectively connected to each signal input end of the controller, a coil of each first relay is respectively connected to each signal output end of the controller, and a contact is respectively connected to each first solenoid valve.

[0007] The hydrogen production device is an electrolytic hydrogen production device.

[0008] The hydrogen storage device includes a hydrogenation reactor, a hydrogen storage tank and a second solenoid valve. The hydrogen storage tank is connected to the output end of the reactor. The first input end of the hydrogenation reactor is connected to the output end of the corresponding hydrogen transmission branch pipe, and the second input end is connected to the energy storage medium supply source. The second solenoid valve is arranged between the hydrogenation reactor and the hydrogen storage tank. The sensor is a liquid level sensor.

[0009] A pressure-stabilizing tank is arranged on the pipeline connecting the hydrogenation reactor and the second solenoid valve.

[0010] A refrigerator is provided on the pipeline connecting the hydrogenation reactor and the second solenoid valve.

[0011] A power pump is arranged on the pipeline connecting the hydrogenation reactor and the second solenoid valve.

[0012] An elastic diaphragm is arranged inside the hydrogen storage tank for dividing the tank body into two compartments.

[0013] The hydrogen storage device comprises a compressor and a high-pressure tank, wherein the input end of the compressor is connected to the output end of the corresponding hydrogen transmission branch pipe, and the output end is connected to the high-pressure tank.

[0014] The hydrogen transmission main pipe is provided with a first flow meter.

[0015] The hydrogen transmission branch pipe is provided with a second flow meter.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1) By designing a method of connecting multiple hydrogen storage devices in parallel, the first relay is responsible for the on and off of the first solenoid valve. When a hydrogen storage device is full and needs to be replaced, other hydrogen storage devices can still receive the hydrogen generated by electrolysis, and will not be blocked in the pipeline to cause an increase in pipeline pressure, thereby improving efficiency and safety.

[0018] 2) Hydrogen is stored through hydrogen storage materials, making the subsequent transportation process safer.

[0019] 3) The presence of the pressure-stabilizing tank can increase the system pipeline pressure buffer when the second solenoid valve is turned off, thereby improving safety.

[0020] 4) An elastic diaphragm is provided inside the hydrogen storage tank to separate the tank body into two compartments, so as to improve the efficiency of the subsequent dehydrogenation process.

[0021] 5) The high-pressure liquefaction method of sampling does not require a dehydrogenation process, and the efficiency of using hydrogen on the user side is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 A schematic diagram of the composition of a hydrogen storage device in one embodiment;

[0024] Figure 3 A wiring diagram of a controller in one embodiment;

[0025] Figure 4 is a wiring diagram of a controller in another implementation manner;

[0026] Among them: 1. hydrogen production device, 2. delivery pump, 3. first solenoid valve, 4. hydrogen storage device, 5. controller, 41. sensor, 42. hydrogenation reactor, 43. pressure regulating tank, 44. power pump, 45. second solenoid valve, 46. hydrogen storage tank. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0028] A hydrogen production system for power peak load regulation, such as Figure 1 As shown, it includes a hydrogen production device 1, a delivery pipeline and a hydrogen storage device 4 connected in sequence, a delivery pump 2 is provided in the delivery pipeline, the power input end of the hydrogen production device 1 is connected to the time-varying power generation equipment, wherein the time-varying power generation equipment includes photovoltaic power generation equipment and wind power generation equipment, the delivery pipeline includes a hydrogen delivery main pipe and multiple hydrogen delivery branches, the delivery pump 2 is arranged in the hydrogen delivery main pipe, a first solenoid valve 3 is provided in the hydrogen delivery branch pipe, the hydrogen storage device 4 is provided with a sensor 41 for monitoring the capacity in the hydrogen storage device 4, the system also includes a controller 5 and multiple first relays, each sensor 41 is respectively connected to each signal input end of the controller 5, the coil of each first relay is respectively connected to each signal output end of the controller 5, and the contact is respectively connected to each first solenoid valve 3.

[0029] By designing a plurality of hydrogen storage devices 4 in parallel, the first relay is responsible for the on and off of the first solenoid valve 3. When one hydrogen storage device 4 is full and needs to be replaced, other hydrogen storage devices 4 can still receive the hydrogen generated by electrolysis, and will not be blocked in the pipeline and cause an increase in pipeline pressure, thereby improving efficiency and safety.

[0030] In this embodiment, the hydrogen production device 1 is an electrolytic hydrogen production device 1, specifically, it produces hydrogen by electrolyzing water. The generated hydrogen first passes through the hydrogen transmission main pipe under the action of the delivery pump 2, and then branches into each hydrogen transmission branch pipe. Under normal circumstances, when the hydrogen storage device 4 normally receives hydrogen, the sensor 41 outputs a low level, the controller 5 receives the low level, the corresponding output pin outputs a low level, the normally closed end of the first relay is closed, and since the normally closed end is connected to the line, the corresponding first solenoid valve 3 is opened, and each hydrogen transmission branch pipe normally supplies hydrogen to the corresponding hydrogen storage device 4. When a certain hydrogen storage device 4 is full, the corresponding sensor 41 outputs a high level, the controller 5 receives the high level, the corresponding output pin outputs a high level, the normally closed end of the first relay is disconnected, and since the normally closed end is connected to the line, the corresponding first solenoid valve 3 is closed. At this time, the other hydrogen transmission branches are still working normally.

[0031] In one embodiment, Figure 2 As shown, the hydrogen storage device 4 includes a hydrogenation reactor 42, a hydrogen storage tank 46 and a second solenoid valve 45. The hydrogen storage tank 46 is connected to the output end of the reactor. The first input end of the hydrogenation reactor 42 is connected to the output end of the corresponding hydrogen delivery branch pipe, and the second input end is connected to the energy storage medium supply source. The second solenoid valve 45 is arranged between the hydrogenation reactor 42 and the hydrogen storage tank 46. The sensor 41 is a liquid level sensor, wherein a pressure stabilizing tank 43 may also be arranged before the hydrogenation reactor 42. The pipeline connecting the hydrogenation reactor 42 and the second solenoid valve 45 is provided with a pressure stabilizing tank 43, a refrigerator and a power pump 44. The wiring of the corresponding controller 5 is as shown in FIG. Figure 3 shown.

[0032] The three signal input terminals I1.0, I1.1 and I1.2 of the controller 5 are connected to the three liquid level sensors respectively. Among the signal output terminals, O1.0, O1.1 and O1.2 are connected to the coils of the three first relays, and O2.0, O2.1 and O2.2 are connected to the coils of the three second relays. Figure 3 In the embodiment, K1 - 1 , K1 - 2 and K1 - 3 are first relays, K2 - 1 , K2 - 2 and K2 - 3 are second relays, and the contacts of the second relays are connected to the second solenoid valves 45 .

[0033] After the hydrogen enters the reactor, it reacts with the liquid organic hydrogen storage material in the hydrogenation reactor 42. The product enters the hydrogen storage tank 46 driven by the power pump 44. When the liquid level in the hydrogen storage tank 46 reaches the set height, the liquid level sensor outputs a high level. I1.0 receives the high level, and the corresponding O1.0 and O2.0 both output high levels. The first solenoid valve 3 and the second solenoid valve 45 are both disconnected. Due to the presence of the pressure regulating tank 43, the reaction can still proceed.

[0034] The hydrogen storage tank 46 is provided with an elastic membrane for dividing the tank body into two compartments. The sizes of the two compartments are variable, but the total volume is fixed, which is convenient for improving the efficiency of the subsequent dehydrogenation process.

[0035] In another embodiment, the hydrogen storage device 4 includes a compressor and a high-pressure tank. The input end of the compressor is connected to the output end of the corresponding hydrogen transmission branch pipe, and the output end is connected to the high-pressure tank. At this time, the sensor adopts a pressure sensor to sample high-pressure liquefaction. There is no need for a dehydrogenation process, and the efficiency of using hydrogen on the user side is higher.

[0036] In this embodiment, a first flow meter is provided on the hydrogen transmission main pipe, and a second flow meter is provided on the hydrogen transmission branch pipe to collect flow data for subsequent adjustment of the production rhythm according to the flow.

Claims

1. A hydrogen production system for power peak load regulation, comprising a hydrogen production device, a delivery pipeline and a hydrogen storage device connected in sequence, wherein a delivery pump is provided in the delivery pipeline, and the power input end of the hydrogen production device is connected to a time-varying power generation device, wherein: The time-varying power generation equipment includes photovoltaic power generation equipment and wind power generation equipment, and is characterized in that the delivery pipeline includes a hydrogen delivery main pipe and a plurality of hydrogen delivery branches, the delivery pump is arranged in the hydrogen delivery main pipe, the hydrogen delivery branch pipe is provided with a first solenoid valve, the hydrogen storage device is provided with a sensor for monitoring the capacity in the hydrogen storage device, the system also includes a controller and a plurality of first relays, each sensor is respectively connected to each signal input end of the controller, the coil of each first relay is respectively connected to each signal output end of the controller, and the contact is respectively connected to each first solenoid valve; The hydrogen storage device comprises a hydrogenation reactor, a hydrogen storage tank and a second solenoid valve, wherein the hydrogen storage tank is connected to the output end of the hydrogenation reactor, the first input end of the hydrogenation reactor is connected to the output end of the corresponding hydrogen delivery branch pipe, and the second input end is connected to the energy storage medium supply source, the second solenoid valve is arranged between the hydrogenation reactor and the hydrogen storage tank, and the sensor is a liquid level sensor; A pressure stabilizing tank is provided on the pipeline connecting the hydrogenation reactor and the second solenoid valve; The hydrogen storage tank is provided with an elastic diaphragm for dividing the tank body into two compartments; The system also includes a plurality of second relays, the coils of the second relays are respectively connected to the signal output terminals of the controller, the contacts are connected to the second solenoid valves, a power pump is provided on the pipeline connecting the hydrogenation reactor and the second solenoid valves, after the hydrogen enters the hydrogenation reactor, it reacts with the liquid organic hydrogen storage material in the hydrogenation reactor, and the product enters the hydrogen storage tank driven by the power pump, when the liquid level in the hydrogen storage tank reaches the set height, the liquid level sensor outputs a high level, the controller receives the high level, the corresponding output terminal outputs a high level, and the corresponding first solenoid valve and the second solenoid valve are disconnected.

2. A hydrogen production system for power peak load regulation according to claim 1, characterized in that: The hydrogen production device is an electrolytic hydrogen production device.

3. A hydrogen production system for power peak load regulation according to claim 1, characterized in that: A refrigerator is provided on the pipeline connecting the hydrogenation reactor and the second solenoid valve.

4. A hydrogen production system for power peak load regulation according to claim 1, characterized in that: The hydrogen transmission main pipe is provided with a first flow meter.

5. The hydrogen production system for power peak load regulation according to claim 1, characterized in that: The hydrogen transmission branch pipe is provided with a second flow meter.

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