Quick starting method and device for hydrogen production through water electrolysis

Abstract

The invention discloses a water electrolysis hydrogen production quick starting method and device, and the method comprises the steps: after a water electrolysis hydrogen production system is started, a make-up pump supplements water into an oxygen separator to an initial liquid level; obtaining pure water temperature of a water outlet of the electrolytic cell; pure water is controlled to circulate according to a small circulation path, and a heater is controlled to heat the pure water and then the pure water enters the electrolytic bath; if the temperature of the pure water is greater than a starting temperature threshold value, electrifying the electrolytic bath; and if the temperature of the pure water is larger than the operating temperature threshold value, the pure water is controlled to circulate according to a large circulation path, a make-up pump supplements water into an oxygen separator to a liquid level range corresponding to the temperature of the pure water, and the pure water enters the electrolytic bath after flowing through a radiator to be cooled. By connecting the heater and the radiator in parallel and combining liquid level control in the oxygen separator, the flowing path of pure water is divided into a large circulation path and a small circulation path, the specific circulation path is determined according to the temperature of the pure water, the temperature of the pure water can be rapidly increased to the temperature needed by reaction of the electrolytic bath, and the starting time of the water electrolysis hydrogen production system is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of water electrolysis, and in particular to a method and device for quickly starting hydrogen production by water electrolysis. Background Art

[0002] In the existing water electrolysis hydrogen production system, after the system is started, the electrolyzer needs to reach a certain temperature before it is powered on. Therefore, pure water needs to be heated first. However, since the pure water has a long flow path, it needs to flow through devices such as heat exchangers and heaters before entering the electrolyzer, which makes the system startup time longer. Summary of the invention

[0003] In view of the above problems, the present invention is proposed to provide a method and device for quickly starting up a water electrolysis hydrogen production system, which can effectively shorten the start-up time of the water electrolysis hydrogen production system.

[0004] According to a first aspect of the present invention, a method and device for rapid start-up of hydrogen production by water electrolysis are provided, which are used in a water electrolysis hydrogen production system. The method comprises:

[0005] After the water electrolysis hydrogen production system is started, the water replenishment pump replenishes water to the oxygen separator to the initial liquid level;

[0006] Get the pure water temperature at the outlet of the electrolytic cell;

[0007] Controlling the pure water to flow along the small circulation path, and controlling the heater to heat the pure water before it enters the electrolytic cell;

[0008] If the pure water temperature is greater than the start-up temperature threshold, the electrolytic cell is powered on;

[0009] If the pure water temperature is greater than the operating temperature threshold, the water supply pump searches for the liquid level range corresponding to the pure water temperature in the preset temperature liquid level table, controls the water supply pump to supply water to the oxygen separation cooler, and controls the pure water to flow along the large circulation path, so that the pure water flows through the radiator to cool down and then enters the electrolytic cell.

[0010] Optionally, after obtaining the pure water temperature at the water outlet of the electrolytic cell, the method further includes:

[0011] Obtaining the pure water level of pure water in the oxygen separator;

[0012] According to the pure water temperature, searching for a liquid level range corresponding to the pure water temperature in a preset temperature liquid level table;

[0013] The operation of the water replenishment pump is controlled according to the pure water liquid level and the liquid level range.

[0014] Optionally, controlling the operation of the water replenishment pump according to the pure water liquid level and the liquid level range includes:

[0015] If the pure water level is less than the lower limit of the liquid level range, controlling the water replenishment pump to replenish water into the oxygen separator;

[0016] If the pure water level is higher than the upper limit of the liquid level range, the water replenishment pump is controlled to stop replenishing water into the oxygen separator.

[0017] Optionally, controlling the pure water to circulate along a small circulation path includes:

[0018] The oxygen separator is controlled to be connected with the heater, the pure water flows out from the water outlet of the oxygen separator, enters the water inlet of the heater, enters the water inlet of the pure water circulation pump through the water outlet of the heater, enters the water inlet of the electrolyzer through the water outlet of the pure water circulation pump, and flows into the oxygen separator through the water outlet of the electrolyzer.

[0019] Optionally, controlling the pure water to circulate along a large circulation path includes:

[0020] The oxygen separator is controlled to be connected with the radiator, the pure water flows out from the water outlet of the oxygen separator, enters the water inlet of the radiator, enters the water inlet of the pure water circulation pump through the water outlet of the radiator, enters the water inlet of the electrolyzer through the water outlet of the pure water circulation pump, and flows into the oxygen separator through the water outlet of the electrolyzer.

[0021] Optionally, the startup temperature threshold is lower than the operating temperature threshold.

[0022] According to a second aspect of the present invention, there is provided a rapid start-up device for producing hydrogen by water electrolysis, comprising:

[0023] A start-up module is used for replenishing water to the initial liquid level in the oxygen separator by a water replenishment pump after the water electrolysis hydrogen production system is started;

[0024] An acquisition module is used to obtain the pure water temperature at the water outlet of the electrolyzer;

[0025] A small circulation module, used to control the pure water to flow along the small circulation path, and control the heater to heat the pure water before it enters the electrolytic cell;

[0026] A power-on module, used to power on the electrolytic cell if the pure water temperature is greater than a starting temperature threshold;

[0027] The large circulation module is used to control the pure water to flow along the large circulation path if the pure water temperature is greater than the operating temperature threshold, so that the pure water flows through the radiator to cool down and then enters the electrolytic cell.

[0028] According to a third aspect of the present invention, there is provided a water electrolysis hydrogen production system, comprising: a control module, a pure water tank, an oxygen separator, a heat exchanger, a heater, an electrolyzer, a pure water circulation pump, and a hydrogen processing module;

[0029] Wherein, the pure water tank is connected to the water make-up pump, the water make-up pump is connected to the first water inlet of the oxygen separator, the water outlet of the oxygen separator is respectively connected to the water inlets of the heater and the heat exchanger through a three-way valve, the water outlets of the heater and the heat exchanger are respectively connected to the water inlet of the pure water circulation pump, the water outlet of the pure water circulation pump is connected to the water inlet of the electrolyzer, and the water outlet of the electrolyzer is connected to the second water inlet of the oxygen separator; the hydrogen outlet of the electrolyzer is connected to the hydrogen processing module;

[0030] The control module is connected to the water replenishment pump, the three-way valve and the electrolyzer, and the control module is used to execute the aforementioned water electrolysis hydrogen production quick start method.

[0031] Optionally, the heater is connected in parallel with the heat exchanger.

[0032] According to a fourth aspect of the present invention, a water electrolysis hydrogen production device is provided, wherein the water electrolysis hydrogen production device comprises the aforementioned water electrolysis hydrogen production system.

[0033] The above one or more technical solutions in the embodiments of this specification have at least the following technical effects:

[0034] The embodiments of this specification provide a method and device for rapid start-up of hydrogen production by water electrolysis. After the water electrolysis hydrogen production system is started, the water replenishment pump replenishes water to the initial liquid level in the oxygen separator; obtains the pure water temperature at the water outlet of the electrolyzer; controls the pure water to flow along a small circulation path, and controls the heater to heat the pure water before entering the electrolyzer; if the pure water temperature is greater than the starting temperature threshold, the electrolyzer is powered on; if the pure water temperature is greater than the operating temperature threshold, the pure water is controlled to flow along a large circulation path, so that the pure water flows through the radiator to cool down before entering the electrolyzer. In this way, by connecting the heater and the radiator in parallel, the flow path of the pure water is divided into two types: large and small circulations. The specific circulation path is determined according to the pure water temperature, so that the pure water temperature can be quickly heated to the temperature required for the electrolyzer reaction, thereby accelerating the start-up time of the water electrolysis hydrogen production system.

[0035] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Also, throughout the accompanying drawings, the same reference figures are used to represent the same components. In the drawings:

[0037] Figure 1 A flow chart of a method for quickly starting hydrogen production by water electrolysis in an embodiment of the present invention is shown.

[0038] Figure 2 A block diagram of a quick start device for producing hydrogen by water electrolysis in an embodiment of the present invention is shown.

[0039] Figure 3 A schematic diagram of a water electrolysis hydrogen production system in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The embodiment of the present invention provides a method for quickly starting hydrogen production by water electrolysis, Figure 1The method includes steps 101 to 105:

[0045] Step 101: After the water electrolysis hydrogen production system is started, a water supply pump supplies water to the oxygen separator to an initial liquid level;

[0046] In this embodiment, the water electrolysis hydrogen production rapid start-up method is applied to the water electrolysis hydrogen production system. Figure 3 As shown, the water electrolysis hydrogen production system mainly includes a control module, a pure water tank, an oxygen separator, a heat exchanger, a heater, an electrolyzer, a pure water circulation pump, and a hydrogen processing module;

[0047] Among them, the pure water tank is connected to the water make-up pump, the water make-up pump is connected to the first water inlet of the oxygen separator, the water outlet of the oxygen separator is connected to the water inlets of the heater and the heat exchanger respectively through a three-way valve, the water outlets of the heater and the heat exchanger are respectively connected to the water inlet of the pure water circulation pump, the water outlet of the pure water circulation pump is connected to the water inlet of the electrolyzer, and the water outlet of the electrolyzer is connected to the second water inlet of the oxygen separator; the hydrogen outlet of the electrolyzer is connected to the hydrogen processing module.

[0048] The control module is connected to the water replenishment pump, the three-way valve and the electrolyzer, and the control module is used to execute a quick start method for producing hydrogen by water electrolysis.

[0049] A temperature sensor is arranged between the oxygen separator and the electrolyzer to measure the pure water temperature at the water outlet of the electrolyzer. The pure water circulation pump is a variable frequency water pump, and a flow sensor is arranged at the water outlet of the pure water circulation pump.

[0050] The hydrogen processing module includes a hydrogen separator connected to the electrolyzer, a hydrogen cooler, a hydrogen purifier and a hydrogen storage tank. It is equipped with a hydrogen temperature sensor, a hydrogen pressure sensor, a trace oxygen detector, a pressure regulating valve and a hydrogen dew point detector.

[0051] A flow display transmitter is installed at the water inlet of the electrolyzer to monitor the pure water flow entering the electrolyzer. A liquid level sensor is installed in the oxygen separator.

[0052] It should be noted that in the prior art, the heater and the radiator in the system are connected in series. When the system is started, the pure water needs to be heated up, but since the pure water needs to flow through the radiator, etc., the pure water flow path is long, which is not conducive to the pure water heating up.

[0053] In this embodiment, the heater and the radiator are connected in parallel to form a large loop and a small loop for pure water to flow through. The system can control the flow path of pure water as needed.

[0054] In the water electrolysis hydrogen production system, when the system is started, it is a cold machine start-up, the electrolyzer is not powered, and the water supply pump supplies water to the oxygen separator and makes the liquid level of the oxygen separator reach the initial liquid level. While the oxygen separator is replenishing water, the heater and circulating water pump immediately enter the working state.

[0055] Step 102: Obtaining the pure water temperature at the water outlet of the electrolytic cell;

[0056] The pure water temperature at the electrolytic cell outlet can be measured by the temperature sensor at the electrolytic cell outlet. In the startup state, the electrolytic cell is not powered on yet, and only the heater heats the pure water, so the outlet temperature is not high at the beginning.

[0057] Step 103: Controlling the pure water to flow along the small circulation path, and controlling the heater to heat the pure water before it enters the electrolytic cell;

[0058] It should be noted that the first port of the three-way valve is connected to the water outlet of the oxygen separator, the second port of the three-way valve is connected to the water inlet of the heater, and the third port of the three-way valve is connected to the water inlet of the radiator.

[0059] In the startup state, the control module controls the first port of the three-way valve to be connected to the second port, thereby controlling the pure water to flow along the small circulation path. Since a heater is provided on the small circulation path, the pure water is heated by the heater and the temperature gradually increases.

[0060] In one embodiment, the small cycle path includes:

[0061] The oxygen separator is controlled to be connected with the heater, and the pure water flows out from the water outlet of the oxygen separator, enters the water inlet of the heater, enters the water inlet of the pure water circulation pump through the water outlet of the heater, enters the water inlet of the electrolyzer through the water outlet of the pure water circulation pump, and then flows into the oxygen separator through the water outlet of the electrolyzer, thereby forming a small circulation path for pure water.

[0062] Step 104: If the pure water temperature is greater than the start temperature threshold, the electrolytic cell is powered on;

[0063] In this embodiment, since pure water flows along a small circulation path, not only the path is short, but also the pure water temperature rises rapidly after being heated by the heater. When the pure water temperature is greater than the start temperature threshold, the electrolyzer is powered on and water electrolysis to produce hydrogen begins.

[0064] It should be noted that the start-up temperature threshold refers to the pure water temperature value that the electrolytic cell can react to, but the start-up temperature threshold is not the pure water temperature value that the electrolytic cell ideally reacts to. The pure water temperature value that the electrolytic cell can react to is generally in the range of about 40 plus or minus 5 degrees. The pure water temperature value that the electrolytic cell ideally reacts to is generally in the range of about 60 plus or minus 5 degrees.

[0065] The electrolytic cell will generate heat power during the reaction, which combined with the heating of the heater will further accelerate the rise of the pure water temperature.

[0066] Step 105: If the pure water temperature is greater than the operating temperature threshold, the pure water is controlled to flow along a large circulation path, so that the pure water flows through the radiator to cool down and then enters the electrolytic cell.

[0067] In this embodiment, when the pure water temperature continues to rise, and the pure water temperature is greater than the operating temperature threshold, the pure water temperature reaches the ideal reaction temperature of the electrolytic cell and should not continue to rise. At this time, the pure water will be controlled to circulate along the large circulation path. The large circulation path does not pass through the heater, but flows through the radiator for cooling, and then enters the electrolytic cell. The thermal power generated by the electrolytic cell reaction and the heat dissipated by the radiator can offset each other. At this time, the system enters the operating state. It should be noted that the startup temperature threshold is less than the operating temperature threshold.

[0068] Specifically, the macrocycle path includes:

[0069] The oxygen separator is controlled to be connected with the radiator, the pure water flows out from the water outlet of the oxygen separator, enters the water inlet of the radiator, enters the water inlet of the pure water circulation pump through the water outlet of the radiator, enters the water inlet of the electrolyzer through the water outlet of the pure water circulation pump, and flows into the oxygen separator through the water outlet of the electrolyzer.

[0070] In addition, after the electrolytic cell is powered on, a reaction occurs in the electrolytic cell and pure water is continuously consumed. At this time, a water replenishment pump is required to replenish water from the pure water tank to the oxygen separator. The pure water temperature needs to be considered when replenishing water.

[0071] In one embodiment, after obtaining the pure water temperature at the water outlet of the electrolytic cell, the method further comprises:

[0072] obtaining the pure water level of the pure water in the oxygen separator in real time;

[0073] According to the pure water temperature, searching for a liquid level range corresponding to the pure water temperature in a preset temperature liquid level table;

[0074] The operation of the water replenishment pump is controlled according to the pure water liquid level and the liquid level range.

[0075] Among them, the temperature level table includes the pure water temperature and the level range corresponding to the pure water temperature. The level range corresponding to the currently acquired pure water temperature can be determined by looking up the table. The level range includes the upper limit value of the level and the lower limit value of the level. If the measured pure water level is less than the lower limit value of the level range, it means that there is less pure water in the oxygen separator. At this time, it is necessary to control the water supply pump to operate in order to supply water to the oxygen separator; if the pure water level is higher than the upper limit value of the level range, it means that there is more pure water in the oxygen separator, and the water supply pump stops working, that is, the water supply pump is controlled to stop supplying water to the oxygen separator.

[0076] On the other hand, the present invention also provides a PID control method for a pure water circulation pump in a water electrolysis hydrogen production system, which is used to maintain the dynamics and stability of the pure water flow rate and pure water temperature of the input electrolyzer, and the method comprises:

[0077] In response to the power supply module supplying power through the rectifier, the switch of the water supply pump and the opening and closing of the control valve, the working state of the system is controlled.

[0078] The temperature of pure water in the oxygen separator is monitored by a temperature sensor, and the current parameter value and the temperature parameter value of the electrolytic cell are obtained, and at the same time, the pure water flow entering the electrolytic cell is obtained.

[0079] The electrolytic cell current parameter value and the electrolytic cell temperature parameter value are used as outputs, and the calibration value is consulted to obtain the theoretical value of the flow rate and temperature difference at this time. The flow rate parameter is input into the preset PID control algorithm to calculate the flow rate of pure water that needs to be provided (the control amount of the pure water circulation pump). The expression of the PID algorithm is:

[0080] u(t)=Kp*e(t)+Ki*∫e(t)dt+Kd*de(t) / dt

[0081] Among them, u(t) is the PID calculation output item (water pump speed), Kp is the P item (proportional item) coefficient, e(t) is the difference between the target temperature and the actual temperature, Ki is the I item (integral item) coefficient, and Kd is the D item (differential item) coefficient.

[0082] The PID control algorithm is calculated in such a way that the theoretical input parameter value is adjusted in a certain proportion according to the size of the deviation value, so that the actual input parameter value corresponds to the original theoretical input parameter value or reduces the deviation value between the two, thereby inputting the deviation value into the PID control algorithm and obtaining the control quantity of the pure water circulation pump of the hydrogen production system, and at the same time embedding the control algorithm into the PID controller.

[0083] Meanwhile, when the PID controller calculates u(k) (i.e., the control quantity of the pure water circulation pump this time), it first determines whether u(k-1) (i.e., the previous control quantity) exceeds the limit range. Among them, if u(k-1) > umax, the PID control algorithm only accumulates negative deviations. If u(k-1) < umin, the PID control algorithm only accumulates positive deviations. umax and umin are the flow rate limits of the pure water circulation pump to limit the maximum and minimum values of the control flow rate of the pure water circulation pump.

[0084] Control the corresponding actuator according to the control quantity to adjust the pure water flow rate and pure water temperature input to the electrolyzer. The actuators are heat exchangers, heaters, and pure water circulation pumps.

[0085] The PID control method for the pure water circulation pump in the hydrogen production system provided by the embodiment of the present invention is beneficial to calculating the control quantity of the pure water entering the electrolyzer this time by obtaining the current parameter value and temperature parameter value of the hydrogen production system, so as to compensate for the difference between the theoretical input parameter value and the actual input parameter value this time, thereby realizing the control of the flow rate of the pure water circulation pump in the hydrogen production system by using the current and temperature parameter values of the electrolyzer. Compared with the prior art, it is beneficial to improve the control accuracy of the operation of the hydrogen production system and the response speed of the hydrogen production system.

[0086] In summary, a method and device for rapid start-up of water electrolysis hydrogen production provided by the embodiments of this specification, after the water electrolysis hydrogen production system is started, the makeup water pump fills the oxygen separator with water to the initial liquid level; obtains the pure water temperature at the outlet of the electrolyzer; controls the pure water to flow along the small circulation path, and controls the heater to heat the pure water and then enter the electrolyzer; if the pure water temperature is greater than the start temperature threshold, the electrolyzer is powered on; if the pure water temperature is greater than the operating temperature threshold, control the pure water to flow along the large circulation path, so that the pure water flows through the radiator to cool down and then enter the electrolyzer. In this way, by connecting the heater and the radiator in parallel, without adding devices, the architecture design is optimized, and the flow path of the pure water is divided into two types: large and small circulation. The specific circulation path is determined according to the pure water temperature, so that the pure water temperature can be quickly heated to the temperature required for the electrolyzer reaction, thereby accelerating the start-up time of the water electrolysis hydrogen production system.

[0087] Based on the same inventive concept, in combination with Figure 2 As shown, the embodiment of the present invention also provides a device for rapid start-up of water electrolysis hydrogen production, including:

[0088] A start-up module, configured to, after the water electrolysis hydrogen production system is started, the makeup water pump fills the oxygen separator with water to the initial liquid level;

[0089] An acquisition module, configured to acquire the pure water temperature at the outlet of the electrolyzer;

[0090] A small circulation module, used to control the pure water to flow along the small circulation path, and control the heater to heat the pure water before it enters the electrolytic cell;

[0091] A power-on module, used to power on the electrolytic cell if the pure water temperature is greater than a starting temperature threshold;

[0092] The large circulation module is used to control the pure water to flow along the large circulation path if the pure water temperature is greater than the operating temperature threshold, so that the pure water flows through the radiator to cool down and then enters the electrolytic cell.

[0093] Optionally, the acquisition module is also used to:

[0094] Obtaining the pure water level of pure water in the oxygen separator;

[0095] According to the pure water temperature, searching for a liquid level range corresponding to the pure water temperature in a preset temperature liquid level table;

[0096] The operation of the water replenishment pump is controlled according to the pure water liquid level and the liquid level range.

[0097] Optionally, the acquisition module is also used to:

[0098] If the pure water level is less than the lower limit of the liquid level range, controlling the water replenishment pump to replenish water into the oxygen separator;

[0099] If the pure water level is higher than the upper limit of the liquid level range, the water replenishment pump is controlled to stop replenishing water into the oxygen separator.

[0100] Optionally, the small loop module is also used to:

[0101] The oxygen separator is controlled to be connected with the heater, the pure water flows out from the water outlet of the oxygen separator, enters the water inlet of the heater, enters the water inlet of the pure water circulation pump through the water outlet of the heater, enters the water inlet of the electrolyzer through the water outlet of the pure water circulation pump, and flows into the oxygen separator through the water outlet of the electrolyzer.

[0102] Optionally, the large loop module is also used to:

[0103] The oxygen separator is controlled to be connected with the radiator, the pure water flows out from the water outlet of the oxygen separator, enters the water inlet of the radiator, enters the water inlet of the pure water circulation pump through the water outlet of the radiator, enters the water inlet of the electrolyzer through the water outlet of the pure water circulation pump, and flows into the oxygen separator through the water outlet of the electrolyzer.

[0104] Optionally, the startup temperature threshold is lower than the operating temperature threshold.

[0105] In summary, the embodiment of this specification provides a quick start device for hydrogen production by water electrolysis. After the water electrolysis hydrogen production system is started, the water supply pump replenishes water to the initial liquid level in the oxygen separator; obtains the pure water temperature at the water outlet of the electrolyzer; controls the pure water to flow along the small circulation path, and controls the heater to heat the pure water before entering the electrolyzer; if the pure water temperature is greater than the starting temperature threshold, the electrolyzer is powered on; if the pure water temperature is greater than the operating temperature threshold, the pure water is controlled to flow along the large circulation path, so that the pure water flows through the radiator for cooling before entering the electrolyzer. In this way, by connecting the heater and the radiator in parallel, the flow path of the pure water is divided into two types, large and small circulations, and the specific circulation path is determined according to the pure water temperature, so that the pure water temperature can be quickly heated to the temperature required for the electrolyzer reaction, thereby accelerating the start-up time of the water electrolysis hydrogen production system.

[0106] Based on the same inventive concept, Figure 3 As shown, an embodiment of the present invention provides a water electrolysis hydrogen production system, including: a control module, a pure water tank, an oxygen separator, a heat exchanger, a heater, an electrolyzer, a pure water circulation pump, and a hydrogen processing module;

[0107] Wherein, the pure water tank is connected to the water make-up pump, the water make-up pump is connected to the first water inlet of the oxygen separator, the water outlet of the oxygen separator is respectively connected to the water inlets of the heater and the heat exchanger through a three-way valve, the water outlets of the heater and the heat exchanger are respectively connected to the water inlet of the pure water circulation pump, the water outlet of the pure water circulation pump is connected to the water inlet of the electrolyzer, and the water outlet of the electrolyzer is connected to the second water inlet of the oxygen separator; the hydrogen outlet of the electrolyzer is connected to the hydrogen processing module;

[0108] The control module is connected to the water replenishment pump, the three-way valve and the electrolyzer, and the control module is used to execute the aforementioned water electrolysis hydrogen production quick start method.

[0109] Optionally, the heater is connected in parallel with the heat exchanger.

[0110] Among them, the specific content of the water electrolysis hydrogen production system can refer to the description of the aforementioned method and will not be repeated here.

[0111] Based on the same inventive concept, an embodiment of the present invention further provides a water electrolysis hydrogen production device, wherein the water electrolysis hydrogen production device includes the aforementioned water electrolysis hydrogen production system.

[0112] The above are only various embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for rapid start-up of hydrogen production by water electrolysis, characterized in that: For a water electrolysis hydrogen production system, the method comprises: After the water electrolysis hydrogen production system is started, the water replenishment pump replenishes water to the oxygen separator to the initial liquid level; Get the pure water temperature at the outlet of the electrolytic cell; Controlling the pure water to flow along the small circulation path, and controlling the heater to heat the pure water before it enters the electrolytic cell; If the pure water temperature is greater than the start-up temperature threshold, the electrolytic cell is powered on; If the pure water temperature is greater than the operating temperature threshold, the pure water is controlled to flow along a large circulation path so that the pure water flows through the radiator to cool down and then enters the electrolytic cell.

2. The method according to claim 1, characterized in that After obtaining the pure water temperature at the water outlet of the electrolytic cell, the method further includes: Obtaining the pure water level of pure water in the oxygen separator; According to the pure water temperature, searching for a liquid level range corresponding to the pure water temperature in a preset temperature liquid level table; The operation of the water replenishment pump is controlled according to the pure water liquid level and the liquid level range.

3. The method according to claim 2, characterized in that The step of controlling the water replenishment pump to operate according to the pure water liquid level and the liquid level range includes: If the pure water level is less than the lower limit of the liquid level range, controlling the water replenishment pump to replenish water into the oxygen separator; If the pure water level is higher than the upper limit of the liquid level range, the water replenishment pump is controlled to stop replenishing water into the oxygen separator.

4. The method according to claim 1, characterized in that: The controlling of pure water to flow along a small circulation path includes: The oxygen separator is controlled to be connected with the heater, the pure water flows out from the water outlet of the oxygen separator, enters the water inlet of the heater, enters the water inlet of the pure water circulation pump through the water outlet of the heater, enters the water inlet of the electrolyzer through the water outlet of the pure water circulation pump, and flows into the oxygen separator through the water outlet of the electrolyzer.

5. The method according to claim 1, characterized in that The controlling of pure water to circulate along a large circulation path includes: The oxygen separator is controlled to be connected with the radiator, the pure water flows out from the water outlet of the oxygen separator, enters the water inlet of the radiator, enters the water inlet of the pure water circulation pump through the water outlet of the radiator, enters the water inlet of the electrolyzer through the water outlet of the pure water circulation pump, and flows into the oxygen separator through the water outlet of the electrolyzer.

6. The method according to claim 1, characterized in that The startup temperature threshold is lower than the operation temperature threshold.

7. A quick start device for producing hydrogen by water electrolysis, characterized in that: include: A start-up module is used for replenishing water to the initial liquid level in the oxygen separator by a water replenishment pump after the water electrolysis hydrogen production system is started; An acquisition module is used to obtain the pure water temperature at the water outlet of the electrolyzer; A small circulation module, used to control the pure water to flow along the small circulation path, and control the heater to heat the pure water before it enters the electrolytic cell; A power-on module, used to power on the electrolytic cell if the pure water temperature is greater than a starting temperature threshold; The large circulation module is used to control the water supply pump to supply water to the oxygen separation cooler if the pure water temperature is greater than the operating temperature threshold, and to control the pure water to flow along the large circulation path so that the pure water flows through the radiator to cool down and then enters the electrolytic cell.

8. A water electrolysis hydrogen production system, characterized in that: include: Control module, pure water tank, oxygen separator, heat exchanger, heater, electrolyzer, pure water circulation pump and hydrogen processing module; Wherein, the pure water tank is connected to the water make-up pump, the water make-up pump is connected to the first water inlet of the oxygen separator, the water outlet of the oxygen separator is respectively connected to the water inlets of the heater and the heat exchanger through a three-way valve, the water outlets of the heater and the heat exchanger are respectively connected to the water inlet of the pure water circulation pump, the water outlet of the pure water circulation pump is connected to the water inlet of the electrolyzer, and the water outlet of the electrolyzer is connected to the second water inlet of the oxygen separator; the hydrogen outlet of the electrolyzer is connected to the hydrogen processing module; The control module is connected to the water replenishment pump, the three-way valve and the electrolyzer, and the control module is used to execute the quick start method for producing hydrogen by water electrolysis according to any one of claims 1-6.

9. The system according to claim 8, characterized in that The heater is connected in parallel with the heat exchanger.

10. A water electrolysis hydrogen production device, characterized in that: The water electrolysis hydrogen production equipment includes the water electrolysis hydrogen production system according to claim 8 or 9.

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