One - key startup system and method for an alkaline electrolyzed water hydrogen production device

Abstract

The present invention discloses a one-button start system and method for an alkaline water electrolysis hydrogen production device. The system comprises: a control system and a one-button start control unit, wherein the control system is connected to the one-button start control unit; the one-button start control unit comprises a standby panel soft button, a start panel soft button, a water supply pump selection soft button and a liquid discharge panel soft button; thereby, the entire start-up process of the alkaline water electrolysis hydrogen production device is sequentially controlled and integrated, forming a highly automated, safe and efficient one-button start solution, avoiding safety risks in the manual start-up process, saving manpower, reducing employment costs, shortening the start-up time, and reducing unnecessary energy waste in the start-up process, thereby solving the problems of slow start-up speed and difficult start-up operation of cluster electrolyzers caused by human factors in large-scale electrolysis hydrogen production projects.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production, and in particular to a one-button starting system and method for an alkaline water electrolysis hydrogen production device. Background Art

[0002] Alkaline water electrolysis hydrogen production technology has become the preferred solution for large-scale water electrolysis hydrogen production due to its high technical maturity, low equipment cost, large gas output per cell, durability, and long life. Alkaline water electrolysis hydrogen production equipment generally involves control elements such as regulating valves, pneumatic ball valves, solenoid valves, and pump motors. These elements must be opened / closed or started / stopped according to set actions. Currently, alkaline electrolyzers are generally started using purely manual or semi-automatic control methods, and the startup process consists of multiple operations. These two control methods are completely or partially completed by the operator through manual operation based on the on-site display instrument or the remote transmission instrument in the control room. The control system development difficulty is low, but the disadvantages are: the startup and commissioning require the participation of multiple people to complete, and the labor cost is high; it is determined by the operator's level, and there are too many uncontrollable factors, resulting in reduced operational accuracy and precision; the operator's level directly affects the equipment startup time. The time for a 5MW alkaline electrolyzer to start at room temperature to the rated operating temperature is usually 1.5~2.0 hours, resulting in unnecessary energy waste; especially for large-scale water electrolysis hydrogen production projects, the number of electrolyzers is large, the operation is more complicated, and most of them require rapid startup in response to changes in renewable energy output. The current purely manual or semi-automatic startup methods are completely unable to meet the development needs of unmanned, less-manned and automated hydrogen production projects. Summary of the Invention

[0003] The embodiments of the present invention provide a one-button start system and method for an alkaline water electrolysis hydrogen production device, aiming to solve the problems of complex operation, low operation accuracy and low start efficiency caused by purely manual or semi-automatic start methods in the prior art.

[0004] In a first aspect, an embodiment of the present invention provides a one-button start system for an alkaline water electrolysis hydrogen production device, the system comprising: a control system and a one-button start control unit, the control system being connected to the one-button start control unit; the one-button start control unit comprising a standby panel soft button, a start panel soft button, a water supply pump selection soft button, and a drain panel soft button; wherein the standby panel soft button is used to confirm the conditions before starting; the start panel soft button is used for one-button start operation and process control; the water supply pump selection soft button is used to select a controlled water supply pump from a preset number of water supply pumps; the drain panel soft button is used to monitor the drain valve status and control the drain duration and timing.

[0005] Furthermore, the system further includes a combustible gas and fire detection unit, an external auxiliary system detection unit, an internal detection unit of the hydrogen production device, an alarm unit and a signal acquisition unit. The alarm unit and the signal acquisition unit are both connected to the control system, and the combustible gas and fire detection unit, the external auxiliary system detection unit and the internal detection unit of the hydrogen production device are all connected to the signal acquisition unit.

[0006] The combustible gas and fire detection unit includes a combustible gas detector and a flame detector connected to the signal acquisition unit, and is used to detect whether a combustible gas leak or fire occurs;

[0007] The external auxiliary system detection unit includes a real-time value of the instrument air pressure and the circulating cooling water pressure connected to the signal acquisition unit, which is used to detect whether the instrument air pressure and the circulating cooling water pressure required by the hydrogen production device are normal, as well as a rectifier cabinet current value, a rectifier cabinet voltage value and a rectifier cabinet fault / shutdown / permitted start status connected to the signal acquisition unit;

[0008] The internal detection unit of the hydrogen production device includes a temperature transmitter, a pressure transmitter, a differential pressure transmitter, a liquid level meter, a flow meter, an online analyzer, a regulating valve positioner, a pneumatic ball valve switch, a solenoid valve switch, a machine pump start / stop / fault status, a machine pump local / remote status and a machine pump frequency converter connected to the signal acquisition unit.

[0009] In a second aspect, an embodiment of the present invention provides a one-button start method for an alkaline water electrolysis hydrogen production device, which is applied to a one-button start system for an alkaline water electrolysis hydrogen production device, the method comprising:

[0010] Click the soft button on the standby panel to complete the pre-startup check to determine whether the electrolyzer in the alkaline water electrolysis hydrogen production device has entered the standby state;

[0011] After checking and confirming that all the startup conditions are met, the control system automatically switches the electrolyzer from the shutdown state to the standby state; wherein, the startup conditions include that the hydrogen production device is replaced qualified, the rectifier cabinet, the electrolyzer, and the gas-liquid separation frame are in normal condition, the manual valve switch state of the hydrogen production device is correct, the instrument air pressure and the circulating water pressure are normal, the alkali liquid pump is operating and the flow rate is normal, the water supply pump is in manual mode, the hydrogen production device does not have any interlock information, and all interlocks of the hydrogen production device are in use;

[0012] Click the start panel soft button to set the control parameters;

[0013] Click the Start button in the soft button of the Start panel and confirm with the second pop-up window to enter the execution mode of automatic operation of the oxygen side regulating valve, temperature regulating valve and all pneumatic ball valves, automatic current increase, automatic temperature increase, automatic pressure increase, automatic maintenance of hydrogen and oxygen liquid level balance, automatic control of alkali liquid pump, automatic control of product gas delivery / venting, automatic water replenishment and automatic liquid drainage;

[0014] If any interlocking information appears during the execution of the automatic current increase, the automatic temperature increase, the automatic pressure increase, and the automatic control of the liquid level balance, then exit the step of executing the oxygen side regulating valve, the temperature regulating valve and all the pneumatic ball valves to automatically increase the current, automatically increase the temperature, automatically increase the pressure, automatically maintain the hydrogen and oxygen liquid level balance, automatically control the alkali liquid pump, automatically control the product gas delivery / venting, automatically replenish water and automatically drain, the rectifier cabinet is shut down, and the alkaline water electrolysis hydrogen production device enters the shutdown state. After troubleshooting, enter the step of checking and confirming that all the start-up conditions are met, and the control system automatically switches the electrolyzer from the shutdown state to the standby state;

[0015] After starting, if the alkaline water electrolysis hydrogen production device reaches a full-load stable operation state and the operating parameters are all within the preset normal range, the one-button start is completed.

[0016] Furthermore, the oxygen side regulating valve, temperature regulating valve and all pneumatic ball valves are automatically included:

[0017] The control system switches the oxygen side regulating valve and the temperature regulating valve into automatic mode, switches the hydrogen side regulating valve into cascade mode, and switches all the pneumatic ball valves and solenoid valves in the hydrogen production device into automatic mode.

[0018] Furthermore, the automatic current increase includes:

[0019] The rectifier cabinet starts automatically or delays starting in automatic mode, and the control system automatically increases the operating current setting value of the electrolytic cell according to a preset current increase rate. The control system then outputs the operating current setting value to the rectifier cabinet, and the rectifier cabinet provides direct current to the electrolytic cell according to the operating current setting value of the control system until the actual current value of the provided direct current reaches the rated current value of the electrolytic cell.

[0020] Furthermore, the automatic temperature increase includes:

[0021] The temperature setting value of the hydrogen production device is automatically set by the control system as the temperature value under rated working conditions;

[0022] The actual temperature of the hydrogen production device is compared with the temperature set value of the hydrogen production device, and the opening of the circulating cooling water regulating valve is automatically controlled by the PID controller until the actual temperature of the hydrogen production device rises to the temperature value under the rated working conditions.

[0023] Furthermore, the automatic voltage boost includes:

[0024] The pressure setting value of the hydrogen production device is automatically set by the control system to the pressure value under rated working conditions;

[0025] The actual pressure of the hydrogen production device is compared with the pressure set value of the hydrogen production device, and the control system gradually changes the pressure set value of the hydrogen production device according to the set pressure increase rate, and then automatically controls the opening of the oxygen side regulating valve through the PID controller until the actual pressure of the hydrogen production device rises to the pressure value under the rated operating conditions.

[0026] Furthermore, the automatic maintenance of hydrogen and oxygen liquid level balance includes:

[0027] The control system automatically puts the hydrogen separator liquid level, oxygen separator liquid level and hydrogen side regulating valve into cascade control, and automatically controls the opening of the hydrogen side regulating valve through the PID controller to automatically eliminate the hydrogen and oxygen separator liquid level difference.

[0028] Furthermore, the automatic control lye pump includes:

[0029] The control system switches the motor of the alkali liquid pump to automatic mode. If the alkali liquid pump is a variable frequency pump, the frequency converter is also switched to automatic mode, and the alkali liquid pump operates according to the control instructions sent by the control system;

[0030] The control system issues an alkali liquid pump stop instruction after the alkaline electrolytic cell is shut down and reaches the cooling and temperature equalization requirements, and automatically sets the frequency value according to the alkali liquid flow set value during the operation of the electrolytic cell.

[0031] Furthermore, the automatic control of product gas delivery / venting includes:

[0032] The control system automatically turns on the solenoid valves for sending / venting the product gases on both sides of hydrogen and oxygen;

[0033] When the delivery conditions preset by the control system are not met, the product gas delivery solenoid valve is automatically closed and the product gas venting solenoid valve is opened;

[0034] When the delivery conditions preset by the control system are met, the product gas delivery solenoid valve is automatically opened and the venting solenoid valve is closed at the same time.

[0035] An embodiment of the present invention provides a one-button start system and method for an alkaline water electrolysis hydrogen production device. The system includes: a control system and a one-button start control unit, wherein the control system is connected to the one-button start control unit; the one-button start control unit includes a standby panel soft button, a start panel soft button, a water supply pump selection soft button, and a drain panel soft button; thereby, the entire startup process of the alkaline water electrolysis hydrogen production device is sequentially controlled and integrated to form a highly automated, safe, and efficient one-button start solution, thereby avoiding safety risks in the manual startup process, saving manpower, and reducing labor costs, while shortening the startup time and reducing unnecessary energy waste in the startup process, thereby solving the problems of slow startup speed and difficult startup operation of cluster electrolyzers caused by human factors in large-scale electrolysis hydrogen production projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 A schematic block diagram of a one-button start system for an alkaline water electrolysis hydrogen production device provided in an embodiment of the present invention;

[0038] Figure 2 A schematic flow chart of a one-button start-up method for an alkaline water electrolysis hydrogen production device provided in an embodiment of the present invention;

[0039] Figure 3 A schematic diagram of a pre-startup check flow in a one-button startup method for an alkaline water electrolysis hydrogen production device provided in an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of the sequential control logic of the one-button start-up method for the alkaline water electrolysis hydrogen production device provided in an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of the startup results of the one-button startup method for the alkaline water electrolysis hydrogen production device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0043] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0044] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in the specification and appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0045] It should be further understood that the term "and / or" used in the present description and appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0046] In order to more clearly understand the technical solution of the present application, the present invention is described in detail below through specific embodiments.

[0047] See also Figure 1 A first aspect of an embodiment of the present invention provides a one-button start system for an alkaline water electrolysis hydrogen production device, the system comprising: a control system 110 and a one-button start control unit 120, the control system 110 being connected to the one-button start control unit 120; the one-button start control unit 120 comprising a standby panel soft button, a start panel soft button, a water supply pump selection soft button and a drain panel soft button; wherein the standby panel soft button is used to confirm the conditions before starting the machine; the start panel soft button is used for one-button start operation and process control; the water supply pump selection soft button is used to select a controlled water supply pump from a preset number of water supply pumps; the drain panel soft button is used to monitor the drain valve status and control the drain time and sequence.

[0048] The system further includes a combustible gas and fire detection unit 130, an external auxiliary system detection unit 140, a hydrogen production device internal detection unit 150, an alarm unit 160 and a signal acquisition unit 170. The alarm unit 160 and the signal acquisition unit 170 are both connected to the control system 110. The signals of the combustible gas and fire detection unit 130, the external auxiliary system detection unit 140 and the hydrogen production device internal detection unit 150 are all connected to the signal acquisition unit 170.

[0049] The combustible gas and fire detection unit 130 includes a combustible gas detector and a flame detector connected to the signal acquisition unit 170, and is used to detect whether a combustible gas leak or fire occurs;

[0050] The external auxiliary system detection unit 140 includes a real-time value of the instrument air pressure and the circulating cooling water pressure connected to the signal acquisition unit 170, and is used to detect whether the instrument air pressure and the circulating cooling water pressure required by the hydrogen production device are normal, as well as a rectifier cabinet current value, a rectifier cabinet voltage value, and a rectifier cabinet fault / shutdown / permitted start status connected to the signal acquisition unit 170;

[0051] The internal detection unit 150 of the hydrogen production device includes a temperature transmitter, a pressure transmitter, a differential pressure transmitter, a liquid level meter, a flow meter, an online analyzer, a regulating valve positioner, a pneumatic ball valve switch, a solenoid valve switch, a machine pump start / stop / fault status, a machine pump local / remote status and a machine pump frequency converter connected to the signal acquisition unit 170.

[0052] Preferably, the preset number of water-making pumps in this embodiment is two water-making pumps, one of which is a spare water-making pump shared by multiple alkaline electrolysis hydrogen production systems.

[0053] Preferably, the control system 110 may be a DCS control system 110 (including a SIS system) or a PLC control system 110 .

[0054] Preferably, the detection objects of the internal detection unit 150 of the hydrogen production device include the electrolytic cell, the gas-liquid separation frame, and all pumps, valves and measuring instruments related to the water replenishment and alkali preparation system.

[0055] Preferably, the detection object of the hydrogen production device internal detection unit 150 may also include a rectifier cabinet.

[0056] Preferably, a communication interface with an external energy management system is added to the one-button start system of the alkaline water electrolysis hydrogen production device to achieve real-time synchronization with renewable energy power generation power.

[0057] In specific implementation, first, click the soft button on the standby panel to complete the pre-startup check to determine whether the alkaline water electrolysis hydrogen production device can enter the standby state; wherein, the pre-startup check items of the alkaline water electrolysis hydrogen production device include:

[0058] 1) The control system 110 is provided with a confirmation button, and the user clicks the confirmation button after manually judging that the hydrogen production device has passed the nitrogen replacement;

[0059] 2) The control system 110 is provided with a confirmation button, and the user manually checks that the status of the equipment related to the hydrogen production device meets the startup conditions and that all instruments are in normal use, and then clicks the confirmation button; wherein the status of the equipment related to the hydrogen production device includes the status of the rectifier cabinet, the status of the electrolyzer, and the status of the gas-liquid separation frame;

[0060] 3) The control system 110 is provided with a confirmation button. After manually judging that the switch status of all manual valves in the hydrogen production device is correct, click the confirmation button, including all manual valves on the gas circuit (hydrogen, oxygen, nitrogen), liquid circuit (alkali solution), and water circuit (circulating cooling water, condensate drainage), to ensure that all manual valves are in the correct open / closed state according to the process requirements;

[0061] 4) The control system 110 receives the signal from the external auxiliary system detection unit 140 and automatically determines whether the instrument air pressure and circulating cooling water pressure of the hydrogen production device meet the process requirements;

[0062] 5) The control system 110 receives the signal from the signal acquisition unit 170 and automatically determines whether the alkali solution circulation pump is operating normally and whether the alkali solution flow rate is higher than the minimum flow rate requirement allowed by the alkali solution circulation pump;

[0063] 6) The control system 110 receives the signal from the signal acquisition unit 170 and automatically determines whether the water supply pump is in manual mode;

[0064] 7) The control system 110 receives the signal from the signal acquisition unit 170, and automatically checks and confirms that there is no interlock information, wherein the interlock information includes: high hydrogen leakage, flame detector alarm, hydrogen production frame emergency stop, rectifier cabinet failure, rectifier cabinet emergency shutdown, high rectifier cabinet current, high rectifier cabinet voltage, high oxygen separator pressure, high oxygen side product gas outlet pressure, high hydrogen side product gas outlet pressure, high oxygen separator liquid level, low oxygen separator liquid level, high hydrogen separator liquid level, low hydrogen separator liquid level, high hydrogen-oxygen separator liquid level difference, high oxygen tank temperature, low alkali liquid flow at the alkali liquid pump outlet, high oxygen content in hydrogen, high hydrogen content in oxygen, low instrument air pressure, and low water tank liquid level;

[0065] 8) The control system 110 performs self-inspection to confirm that all interlocks in the hydrogen production device are in use; among them, the interlocks include one or more combinations of the following interlocks: rectifier cabinet fault interlock protection; electrolytic cell operating current over-rated interlock protection; electrolytic cell operating voltage over-rated interlock protection; circulating alkali solution high temperature interlock protection; alkali solution circulating flow low interlock protection; oxygen tank high temperature interlock protection; hydrogen tank high temperature interlock protection; hydrogen-oxygen separator liquid level high-low interlock protection; oxygen tank high pressure interlock protection; hydrogen / oxygen low purity interlock protection; hydrogen / oxygen pipeline high pressure interlock protection; water tank low level interlock protection; power outage interlock protection; instrument air stop interlock protection.

[0066] After the above conditions are met, the control system 110 automatically switches the electrolytic cell from shutdown state to standby state.

[0067] Specifically, when the electrolyzer is in standby mode, after the start button is pressed, the control system 110 receives the start signal and starts executing the one-button start procedure. The hydrogen production device automatically increases the current, temperature, and pressure according to the preset program until it is in full load operation mode, and automatically maintains the liquid level balance of the hydrogen-oxygen separator, automatically replenishes water, and automatically drains liquid. The hydrogen production device operates stably, and the one-button start is completed. During the entire startup process, the signal acquisition unit 170 and the external auxiliary system detection unit 140 continuously transmit the collected signals to the control system 110. If the control system 110 determines that any of all interlocks exceeds the normal control range but does not trigger the interlock, the alarm unit 160 issues an alarm. If the control system 110 determines that a certain signal is within the interlock shutdown range, it exits the currently executed step, interlocks and shuts down the rectifier cabinet, and the alarm unit 160 issues an alarm. After the operator makes corresponding adjustments, the pre-start check is performed again. After the electrolyzer is in standby mode, the one-button start procedure is entered again.

[0068] See also Figures 2 to 5 A second aspect of an embodiment of the present invention provides a one-key startup method for an alkaline water electrolysis hydrogen production device, which is applied to a one-key startup system for an alkaline water electrolysis hydrogen production device. The method includes the following steps S110-S160:

[0069] S110, clicking the soft button on the standby panel to complete the pre-startup check to determine whether the electrolyzer in the alkaline water electrolysis hydrogen production device has entered the standby state;

[0070] S120. After checking and confirming that all startup conditions are met, the control system automatically switches the electrolyzer from the shutdown state to the standby state. The startup conditions include that the hydrogen production device has been replaced successfully, the rectifier cabinet, the electrolyzer, and the gas-liquid separation frame are in normal condition, the manual valve of the hydrogen production device is in the correct state, the instrument air pressure and circulating water pressure are normal, the alkali liquid pump is operating normally and the flow rate is normal, the water supply pump is in manual mode, the hydrogen production device does not have any interlock information, and all interlocks of the hydrogen production device are in use.

[0071] S130, click the soft button on the start panel to set the control parameters;

[0072] S140. Click the start button in the start panel soft button, and confirm the second pop-up window. Then, the oxygen-side regulating valve, temperature regulating valve, and all pneumatic ball valves will be automatically set to automatic operation, automatic current increase, automatic temperature increase, automatic pressure increase, automatic maintenance of hydrogen and oxygen liquid level balance, automatic control of alkali liquid pump, automatic control of product gas delivery / venting, automatic water replenishment, and automatic liquid drainage.

[0073] S150, if any interlock information appears during the execution of the automatic current increase, the automatic temperature increase, the automatic pressure increase, and the automatic control of the liquid level balance, then exit the step of executing the automatic operation of the oxygen-side regulating valve, the temperature regulating valve, and all the pneumatic ball valves, automatic current increase, automatic temperature increase, automatic pressure increase, automatic maintenance of hydrogen and oxygen liquid level balance, automatic control of the alkali liquid pump, automatic control of product gas delivery / venting, automatic water replenishment, and automatic liquid drainage, the rectifier cabinet is shut down, and the alkaline water electrolysis hydrogen production device enters the shutdown state. After troubleshooting, enter the step of checking and confirming that all the startup conditions are met, and the control system automatically switches the electrolyzer from the shutdown state to the standby state;

[0074] S160: After starting, if the alkaline water electrolysis hydrogen production device reaches a full-load stable operation state and the operating parameters are all within the preset normal range, the one-button start is completed.

[0075] In specific implementation, click the soft button on the standby panel of the control system to complete all pre-start checks. The pre-start checks include:

[0076] 1) After manually judging that the hydrogen production device has passed the nitrogen replacement, click the soft button → "Nitrogen Replacement Passed" button on the standby panel of the DCS control system to confirm;

[0077] 2) After manually checking that the status of the relevant equipment of the hydrogen production unit has met the startup conditions and all instruments are in normal use, click the soft button on the standby panel of the DCS control system → "Equipment and instruments meet startup conditions" button to confirm;

[0078] 3) After manually confirming that the switch status of all manual valves in the hydrogen production unit is correct, click the "Process flow meets start-up conditions" soft button on the standby panel of the DCS control system to confirm. The switch status of all manual valves in the hydrogen production unit includes all manual valves on the gas circuit (hydrogen, oxygen, nitrogen), liquid circuit (alkali solution), and water circuit (circulating cooling water, condensate drainage). Ensure that all manual valves are in the correct open / closed state according to process requirements.

[0079] 4) The DCS control system receives signals from the external auxiliary system detection unit and automatically determines whether the instrument air pressure and circulating cooling water pressure of the hydrogen production device meet the process requirements;

[0080] 5) The DCS control system receives the signal from the signal acquisition unit and automatically determines whether the alkali solution circulation pump is operating normally and whether the alkali solution flow rate is higher than the minimum flow rate requirement allowed by the alkali solution circulation pump;

[0081] 6) The DCS control system receives the signal from the signal acquisition unit and automatically determines whether the water supply pump is in manual mode;

[0082] 7) The DCS control system and SIS system receive signals from the signal acquisition unit and automatically check and confirm that there are no interlocking information. Interlocking information includes: high hydrogen leakage, flame detector alarm, hydrogen production frame emergency stop, rectifier cabinet failure, rectifier cabinet emergency shutdown, high rectifier cabinet current, high rectifier cabinet voltage, high oxygen separator pressure, high oxygen side product gas outlet pressure, high hydrogen side product gas outlet pressure, high oxygen separator liquid level, low oxygen separator liquid level, high hydrogen separator liquid level, low hydrogen separator liquid level, high hydrogen-oxygen separator liquid level difference, high oxygen tank temperature, low alkali liquid flow at the alkali liquid pump outlet, high oxygen content in hydrogen, high hydrogen content in oxygen, low instrument air pressure, and low water tank liquid level.

[0083] 8) Perform self-inspection on the DCS control system and SIS system to confirm that all interlocks are in use.

[0084] More specifically, the one-button start-up method of the alkaline water electrolysis hydrogen production device of the present invention includes:

[0085] Step S0: Click the soft button on the standby panel of the control system to complete all the aforementioned pre-startup checks; wherein, the step S0 corresponds to the above-mentioned step S110 and step S120; if any of the inspection results in the above-mentioned inspection contents does not meet the corresponding startup conditions, the electrolytic cell remains in the shutdown state; if all the inspection results meet the startup conditions, the control system automatically switches the electrolytic cell state to the standby state, and then enters step S1; wherein, the step S1 corresponds to the secondary pop-up confirmation operation in the above-mentioned step S130 and step S140.

[0086] The step S1 comprises:

[0087] 1) Before starting the electrolytic cell, click the soft button on the start panel, which includes control parameter settings and one-touch start operation. The control parameter settings include system operating load, system operating pressure, system pressure holding pressure, system operating temperature (alkali solution temperature at the electrolytic cell inlet), current rise / fall rate, water replenishment pump start automatic time setting value, water replenishment interval setting value, water replenishment duration setting value, hydrogen and oxygen separator liquid level average lower limit setting value, hydrogen and oxygen separator liquid level average upper limit setting value, alkali solution pump automatic pump stop time setting value, hydrogen and oxygen water separator liquid level upper limit setting value, hydrogen and oxygen water separator liquid level lower limit setting value; the start button is used for one-touch start;

[0088] Preferably, during the electrolytic cell standby phase, the control system automatically obtains the current power input through a communication interface with an external energy management system, and dynamically adjusts the system's target operating load and current ramp rate to quickly match energy output;

[0089] When the electrolytic cell is in standby mode, click the start button in the start panel soft button of the control system, and then a second pop-up window confirmation is performed. After clicking confirmation, enter step S2; wherein, step S2 corresponds to the above-mentioned step S140 to enter the execution of the oxygen side regulating valve, temperature regulating valve and all pneumatic ball valves to automatically start, automatically increase current, automatically increase temperature, automatically increase pressure, automatically maintain hydrogen and oxygen liquid level balance, automatically control the alkali liquid pump, automatically control the product gas delivery / venting, automatically replenish water and automatically drain, and step S150.

[0090] The step S2 includes:

[0091] After one-button start, the oxygen-side regulating valve, the temperature regulating valve and all the pneumatic ball valves are put into automatic mode, including: the control system puts the oxygen-side regulating valve and the temperature regulating valve into automatic mode, puts the hydrogen-side regulating valve into cascade mode, and switches all the pneumatic ball valves and solenoid valves in the hydrogen production device into automatic mode;

[0092] After one-button start, the automatic current increase includes: the rectifier cabinet automatically starts immediately or delays starting in automatic mode, the control system automatically increases the operating current setting value of the electrolytic cell according to a preset current increase rate, and then the control system outputs the operating current setting value to the rectifier cabinet, and the rectifier cabinet provides direct current to the electrolytic cell according to the operating current setting value of the control system until the actual current value of the provided direct current reaches the rated current value of the electrolytic cell;

[0093] After one-button start, the automatic temperature rise includes: the temperature setting value of the hydrogen production device is automatically set by the control system to the temperature value under the rated working conditions; the actual temperature of the hydrogen production device is compared with the temperature setting value of the hydrogen production device, and then the opening of the circulating cooling water regulating valve is automatically controlled by the PID controller until the actual temperature of the hydrogen production device rises to the temperature value under the rated working conditions;

[0094] After one-button start, the automatic pressure increase includes: the pressure setting value of the hydrogen production device is automatically set by the control system to the pressure value under the rated working conditions; the actual pressure of the hydrogen production device is compared with the pressure setting value of the hydrogen production device, the control system gradually changes the pressure setting value of the hydrogen production device according to the set pressure increase rate, and automatically controls the opening of the oxygen-side regulating valve through the PID controller until the actual pressure of the hydrogen production device rises to the pressure value under the rated working conditions;

[0095] After one-button start, the automatic maintenance of hydrogen and oxygen liquid level balance includes: the control system automatically puts the hydrogen separator liquid level, the oxygen separator liquid level, and the hydrogen side regulating valve into cascade control, that is, the hydrogen separator liquid level setting value is equal to the actual value of the oxygen separator liquid level, the actual hydrogen separator liquid level value is compared with the hydrogen separator liquid level setting value, and then the PID controller automatically controls the opening of the hydrogen side regulating valve to achieve the purpose of automatically eliminating the hydrogen and oxygen separator liquid level difference;

[0096] After one-button start, the automatic control of the alkali liquid pump includes: the control system switches the motor of the alkali liquid pump to automatic mode, and if the alkali liquid pump in operation is a variable frequency pump, the frequency converter is also switched to automatic mode, and then the alkali liquid pump in operation operates according to the control instructions sent by the control system; wherein, after the alkaline electrolytic cell is shut down and the temperature is reduced and evenly distributed, the control system issues a alkali liquid pump stop instruction, and automatically sets the frequency value according to the alkali liquid flow control requirements during the operation of the electrolytic cell;

[0097] After one-button start, the automatic control of product gas delivery / venting includes: the control system automatically turns on the product gas delivery / venting solenoid valves on both sides of hydrogen and oxygen; when the delivery conditions preset by the control system are not met, the product gas delivery solenoid valve is automatically closed and the product gas venting solenoid valve is opened; when the delivery conditions preset by the control system are met, the product gas delivery solenoid valve is automatically opened and the venting solenoid valve is closed at the same time.

[0098] The automatic water replenishment includes: after the rectifier cabinet is started, the water replenishment pump motor selected in advance by the water replenishment pump selection soft button is delayed for a certain time and then switched to automatic mode. The time can be manually set, preferably the latest acceptable pump replenishment time for the alkaline water electrolysis hydrogen production device. Then, the water replenishment pump is automatically started and stopped according to the actual water replenishment demand of the hydrogen production device and the instructions sent by the control system.

[0099] The automatic drainage includes: after the rectifier cabinet is started, all the drainage valves at the bottom of the hydrogen side gas-water separator and all the drainage pneumatic ball valves at the bottom of the oxygen side gas-water separator are automatically opened / closed according to the preset drainage logic.

[0100] If any interlock information appears during the process of automatic current increase, automatic temperature increase, automatic voltage increase, and automatic control of liquid level balance in step S2, step S2 is exited, the rectifier cabinet is shut down, and the alkaline water electrolysis hydrogen production device enters a shutdown state, and step S0 is entered again after the fault is eliminated;

[0101] After startup, the alkaline water electrolysis hydrogen production device reaches a stable operation state at full load, and all operating parameters are within the normal range, and the one-button startup is completed; among them, all operating parameters include current value, temperature value, pressure value and liquid level value.

[0102] Preferably, in step S0, before starting the one-button start control unit, it is necessary to first confirm that the power supply of the alkaline water electrolysis hydrogen production device meets the startup conditions, that is, the power supply power is higher than the minimum startup power requirement of the alkaline water electrolysis hydrogen production device; and it is necessary to confirm that the rectifier cabinet is in standby state, that is, the cooling system of the rectifier cabinet has been put into use normally, the rectifier transformer has supplied power to the rectifier cabinet, and the rectifier cabinet has completed all operation tests. Once the startup command issued by the control system is received, it can be started normally and the required direct current is delivered to the alkaline water electrolysis hydrogen production device; it is necessary to confirm that the downstream of the alkaline water electrolysis hydrogen production device has the conditions for receiving hydrogen and oxygen, that is, the downstream gas purification unit has been qualified for nitrogen replacement and the nitrogen is slightly positively pressured, the pressure must be lower than the gas production pressure of the alkaline water electrolysis hydrogen production device, the process flow inside the gas purification unit has been opened according to the startup requirements, and all ancillary equipment and instruments of the gas purification unit are put into use according to the startup requirements; wherein, the gas purification unit is preferably arranged in the alkaline water electrolysis hydrogen production device in this embodiment.

[0103] Preferably, in step S1, before starting the one-button start control unit, in order to give the operator a clear prompt, each alkaline water electrolysis hydrogen production device in the standby state will send out an obvious prompt signal and prompt text. For example, on the control system operation screen, the alkaline electrolyzer icon that is already in the standby state will change from gray to blue (gray represents the shutdown state, green represents the running state, and blue represents the standby state), and the text "standby state" will be displayed on the electrolyzer icon.

[0104] Preferably, in step S1, after the operator clicks the start button, if the operator wants to temporarily pause the load increase process, a pause button can be added to the soft buttons on the start panel. After the operator clicks the pause button, if the operating current of the electrolyzer is higher than or equal to the minimum allowable current (generally 30% of the rated current), the current setting value will no longer increase, but will be equal to the actual current value at the time of pause. If the operating current of the electrolyzer is lower than the minimum allowable current at this time, the current setting value will be equal to the minimum allowable current, and the system pressure setting value will no longer change after clicking the pause button, but the control system will continue to execute the automatic temperature increase, automatic maintenance of hydrogen and oxygen liquid level balance, automatic water replenishment, and automatic drainage control logic without being affected by the pause.

[0105] Preferably, in step S1, after the operator clicks the pause button, if the operator wants to continue to complete the subsequent one-key start process from the temporary pause position, the operator can click the start button in the start panel soft button. After clicking the start button, the alkaline water electrolysis hydrogen production device will continue to complete the subsequent startup steps from the breakpoint position until it reaches a full-load stable operation state.

[0106] Preferably, in step S1, if the operator wants to temporarily decide to perform a shutdown operation during the process of automatically executing the startup process of the control system, a stop button can be added to the "start panel". After the operator clicks the stop button, the alkaline water electrolysis hydrogen production device will exit the one-button startup process and immediately execute the shutdown process, that is: stop executing the automatic current increase process, and the current setting value is automatically given to "0 A"; stop executing the automatic pressure increase process, and the system pressure is automatically given to a slightly positive pressure (for example, 0.3 MPa); stop executing the automatic temperature increase process, and the temperature setting value is automatically given to 25°C; after clicking the stop button, keep the alkali liquid pump running for a certain time until the system temperature drops to 25°C, the alkali liquid pump automatically stops and remains in the pump-stop state; stop executing the automatic water replenishment process, the water replenishment pump automatically remains in the pump-stop state, and the water replenishment valve automatically remains in the closed state; stop executing the automatic drainage program, and all drainage pneumatic ball valves or solenoid valves remain in the closed state; continue to execute the automatic maintenance of hydrogen and oxygen liquid level balance program; stop executing the alkali liquid circulation; all regulating valves, pneumatic ball valves, and solenoid valves remain in automatic mode.

[0107] Preferably, in step S2, the operator can temporarily modify the startup completion target value of the alkaline water electrolysis hydrogen production device during the process of the control system automatically executing the startup process, such as the operating current target value, the system pressure target value, and the system temperature target value. The operator can also temporarily modify the current rise / fall rate, the system pressure rise / fall rate, the water supply pump start automatic time setting value, the analytical instrument interlocking commissioning time setting value, the system drainage time and frequency setting value; however, during the process of the control system automatically executing the startup process, the control logic cannot be modified to avoid causing safety accidents.

[0108] Preferably, a quick response mode option is set in the soft button of the start panel. After selecting the quick response mode, when a surge in renewable energy output is detected, the control system will give priority to quickly increasing the temperature and current, and the system pressure adjustment will be carried out subsequently to ensure that the hydrogen production device reaches a stable operating state as soon as possible.

[0109] Example 1

[0110] 1. Basic parameters of electrolytic cell

[0111] The basic parameters of the electrolyzer used for experiments and implementation include but are not limited to the following:

[0112] Rated power (5 MW); operating current (12,500 A); operating voltage (370 V); rated operating current density (2,500 A / m²); transmission mode (one positive and two negative); plate diameter (2,000 mm); operating pressure (1.8 MPaG); operating temperature (85°C ± 5°C); cathode and anode material (nickel-plated carbon steel); alkali concentration (30 wt%); hydrogen-side and oxygen-side gas-liquid separator liquid levels (50%); alkali pump (fixed-frequency pump); alkali circulation mode (hybrid); single-side water replenishment (hydrogen-side water replenishment);

[0113] 2. Control system type: DCS control system (including SIS system);

[0114] 3. One-key start method is as follows:

[0115] 1. Inspection before starting

[0116] First, the operator clicks the "Standby Panel" soft button to complete the pre-startup check to determine whether the alkaline water electrolysis hydrogen production device can enter the standby state. The inspection content specifically includes:

[0117] 1) After manually judging that the hydrogen production device has passed the nitrogen replacement, click the soft button → "Nitrogen Replacement Passed" button on the standby panel of the DCS control system to confirm;

[0118] 2) After manually checking that the status of the relevant equipment of the hydrogen production unit has met the startup conditions and all instruments are in normal use, click the soft button on the standby panel of the DCS control system → "Equipment and instruments meet startup conditions" button to confirm;

[0119] 3) After manually confirming that the switch status of all manual valves in the hydrogen production unit is correct, click the "Process flow meets start-up conditions" soft button on the standby panel of the DCS control system to confirm. The switch status of all manual valves in the hydrogen production unit includes all manual valves on the gas circuit (hydrogen, oxygen, nitrogen), liquid circuit (alkali solution), and water circuit (circulating cooling water, condensate drainage). Ensure that all manual valves are in the correct open / closed state according to process requirements.

[0120] 4) The DCS control system receives signals from the external auxiliary system detection unit and automatically determines whether the instrument air pressure and circulating cooling water pressure of the hydrogen production device meet the process requirements;

[0121] 5) The DCS control system receives the signal from the signal acquisition unit and automatically determines whether the alkali solution circulation pump is operating normally and whether the alkali solution flow rate is higher than the minimum flow rate requirement allowed by the alkali solution circulation pump;

[0122] 6) The DCS control system receives the signal from the signal acquisition unit and automatically determines whether the water supply pump is in manual mode;

[0123] 7) The DCS control system and SIS system receive signals from the signal acquisition unit and automatically check and confirm that there are no interlocking information. Interlocking information includes: high hydrogen leakage, flame detector alarm, hydrogen production frame emergency stop, rectifier cabinet failure, rectifier cabinet emergency shutdown, high rectifier cabinet current, high rectifier cabinet voltage, high oxygen separator pressure, high oxygen side product gas outlet pressure, high hydrogen side product gas outlet pressure, high oxygen separator liquid level, low oxygen separator liquid level, high hydrogen separator liquid level, low hydrogen separator liquid level, high hydrogen-oxygen separator liquid level difference, high oxygen tank temperature, low alkali liquid flow at the alkali liquid pump outlet, high oxygen content in hydrogen, high hydrogen content in oxygen, low instrument air pressure, and low water tank liquid level.

[0124] 8) Conduct self-inspection of the DCS control system and SIS system to confirm that all interlocks are in use;

[0125] 2. Step S0:

[0126] After checking and confirming that all the startup conditions are met, the DCS control system automatically switches the electrolytic cell from shutdown state to standby state;

[0127] 3. Step S1:

[0128] 1) Click the "Start Panel" soft button to set the control parameters; set the control system operating load to 100%, the alkaline water electrolysis hydrogen production device operating pressure to 1.8 MPaG, the alkaline water electrolysis hydrogen production device holding pressure to 0.3 MPa, the alkaline water electrolysis hydrogen production device operating temperature (electrolyzer inlet alkali solution temperature) to 90°C, the current rise / fall rate to ≤0.2% rated current / s, the water supply pump automatic start time to 15 minutes after the rectifier cabinet is started, the water supply interval to 20 minutes, the water supply duration to 10 minutes, the hydrogen-oxygen separator liquid level average lower limit to 48%, the hydrogen-oxygen separator liquid level average upper limit to 52%, the alkali solution pump automatic pump stop time to 1 hour after the rectifier cabinet is powered off, the hydrogen side gas-water separator liquid level upper limit and the oxygen side gas-water separator liquid level lower limit to 50%, and the hydrogen side gas-water separator liquid level lower limit and the oxygen side gas-water separator liquid level lower limit to 20%;

[0129] 2) When the electrolytic cell is in standby mode, click the start button in the "Start Panel" soft button of the control system, and then a second pop-up window will pop up for confirmation. Click confirm to proceed to step S2;

[0130] 4. Step S2:

[0131] 1) After one-button start, the DCS control system puts the oxygen-side regulating valve and temperature regulating valve into automatic mode, and puts the hydrogen-side regulating valve into cascade mode. After the cascade mode, the hydrogen-side gas-liquid separator liquid level setting value changes with the actual value of the oxygen-side gas-liquid separator liquid level. The hydrogen-side regulating valve opening is controlled by the hydrogen-side gas-liquid separator liquid level setting value, and all pneumatic ball valves and solenoid valves are switched to automatic mode;

[0132] 2) Automatic current increase: After one-button start, the rectifier cabinet automatically starts in automatic mode after a delay of 30 seconds. The DCS control system automatically increases the current gradually to 12500A according to the pre-set current increase rate (≤0.2% rated current / s). The DCS control system then outputs the current setting value to the rectifier cabinet, which provides DC power to the electrolyzer according to the current value given by the DCS control system until the actual DC current value provided reaches 12500A.

[0133] 3) Automatic temperature rise: After one-button start, the temperature setting value of the hydrogen production device is automatically set by the DCS control system to 90°C under rated operating conditions. The actual temperature of the hydrogen production device is compared with the temperature setting value of the hydrogen production device, and then the PID controller automatically controls the opening of the circulating cooling water regulating valve until the actual temperature of the hydrogen production device rises to 90°C;

[0134] 4) Automatic pressure boost: After one-button start, the DCS control system automatically sets the pressure setting value of the hydrogen production unit to 1.8MPaG. The actual pressure of the hydrogen production unit is compared with the pressure setting value of the hydrogen production unit, and then the PID controller automatically controls the opening of the oxygen side regulating valve until the actual pressure of the hydrogen production unit rises to 1.8MPaG;

[0135] 5) Automatically maintain hydrogen and oxygen liquid level balance: After one-button start, the DCS control system automatically puts the hydrogen separator liquid level, oxygen separator liquid level, and hydrogen side regulating valve into cascade control, that is, the hydrogen separator liquid level set value is equal to the actual value of the oxygen separator liquid level, the actual hydrogen separator liquid level is compared with the hydrogen separator liquid level set value, and then the PID controller automatically controls the opening of the hydrogen side regulating valve to achieve the purpose of automatically eliminating the hydrogen and oxygen separator liquid level difference;

[0136] 6) Automatic control of alkali liquid pump: After one-button start, the DCS control system switches the motor of the alkali liquid pump to automatic mode, and then the alkali liquid pump operates according to the control instructions sent by the control system. The control system issues a alkali liquid pump stop instruction one hour after the rectifier cabinet is powered off;

[0137] 7) Automatic control of product gas delivery / venting: After one-button start, the DCS control system automatically turns on the hydrogen side product gas delivery / venting solenoid valve. When the hydrogen delivery conditions preset by the DCS control system are not met (oxygen in hydrogen ≥ 0.8%, or the electrolyzer is shut down, or the rectifier cabinet is powered off, or the absolute value of the hydrogen-oxygen separator liquid level difference ≥ 50mm, or the hydrogen delivery pressure ≤ 1.6MPaG, or the hydrogen delivery pressure ≥ 1.9MPaG), the product hydrogen delivery solenoid valve is automatically closed and the product gas venting valve is opened. When the delivery conditions preset by the DCS control system are met, the product hydrogen delivery solenoid valve is automatically opened and the product gas venting valve is closed at the same time; the oxygen side product gas is directly vented;

[0138] 8) Automatic water replenishment: After the rectifier cabinet is started, the DCS control system will delay the water replenishment pump motor for 15 minutes and then switch to automatic mode. Then, when the average liquid level of the hydrogen-oxygen separator is lower than the lower limit of 48%, the water replenishment pump will start automatically and the water replenishment solenoid valve will open automatically. Water will be replenished to the system once every 20 minutes for 10 minutes until the average liquid level of the hydrogen-oxygen separator is lower than the upper limit of 52%. Then, the water replenishment solenoid valve will be closed and the water replenishment pump will be shut down.

[0139] 9) Automatic drainage: After the rectifier cabinet is started, when the liquid level of the hydrogen-side gas-water separator is ≥50%, all the pneumatic drain valves at the bottom of the hydrogen-side gas-water separator are opened for drainage, and the liquid level is ≤20% when all the pneumatic drain valves at the bottom of the hydrogen-side gas-water separator are closed; when the liquid level of the oxygen-side gas-water separator is ≥50%, all the pneumatic drain valves at the bottom of the oxygen-side gas-water separator are opened for drainage, and the liquid level is ≤20% when all the pneumatic drain valves at the bottom of the oxygen-side gas-water separator are closed;

[0140] 10) If any interlock information appears during the execution of automatic current increase, automatic temperature increase, automatic voltage increase, and automatic liquid level balance maintenance, then exit step S2, shut down the rectifier cabinet, and enter the alkaline water electrolysis hydrogen production device into the shutdown state. After the fault is eliminated, enter step S0 again;

[0141] 11) After startup, the alkaline water electrolysis hydrogen production device reaches a stable full-load operation state, and all operating parameters are within the normal range. The one-button startup is completed.

[0142] 4. One-key startup effect:

[0143] This example achieved a hydrogen production unit that went from shutdown to rated gas production (1000 standard cubic meters per hour) in just 42 minutes, achieved a qualified hydrogen content in oxygen (≤1.5%) in 37 minutes, and took 63 minutes for the electrolyzer temperature to rise from 20°C to the rated operating temperature of 85°C. Therefore, this example demonstrates that, after adopting the one-button startup method for an alkaline water electrolysis hydrogen production unit, the time it takes to go from a cold start to full load operation is shortened to 63 minutes. This significantly improves the startup speed and enhances the system's adaptability to renewable energy sources compared to the 1.5-2 hour cold start time under manual operation.

[0144] Table 1 Cold start response timetable of hydrogen production unit (electrolyzer start temperature 20°C)

[0145]

[0146] The present invention realizes the sequential control integration of the entire startup process of the alkaline water electrolysis hydrogen production device, forming a highly automated, safe and efficient one-button startup solution, avoiding the safety risks in the manual startup process, saving manpower, and reducing employment costs. At the same time, it also shortens the startup time and reduces unnecessary energy waste during the startup process, thereby solving the problems of slow startup speed and difficult startup operation of cluster electrolyzers caused by human factors in large-scale electrolysis hydrogen production projects.

[0147] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A one-button start method for an alkaline water electrolysis hydrogen production device, applied to a one-button start system for an alkaline water electrolysis hydrogen production device, characterized in that: The method comprises: Click the soft button on the standby panel to complete the pre-startup check to determine whether the electrolyzer in the alkaline water electrolysis hydrogen production device has entered the standby state; After checking and confirming that all the startup conditions are met, the control system automatically switches the electrolyzer from the shutdown state to the standby state; wherein, the startup conditions include that the hydrogen production device is replaced qualified, the rectifier cabinet, the electrolyzer, and the gas-liquid separation frame are in normal condition, the manual valve switch state of the hydrogen production device is correct, the instrument air pressure and the circulating water pressure are normal, the alkali liquid pump is operating and the flow rate is normal, the water supply pump is in manual mode, the hydrogen production device does not have any interlock information, and all interlocks of the hydrogen production device are in use; Click the start panel soft button to set the control parameters; Click the Start button in the soft button of the Start panel and confirm with the second pop-up window to enter the execution mode of automatic operation of the oxygen side regulating valve, temperature regulating valve and all pneumatic ball valves, automatic current increase, automatic temperature increase, automatic pressure increase, automatic maintenance of hydrogen and oxygen liquid level balance, automatic control of alkali liquid pump, automatic control of product gas delivery / venting, automatic water replenishment and automatic liquid drainage; If any interlock information appears during the execution of the automatic current increase, the automatic temperature increase, the automatic pressure increase, and the automatic maintenance of hydrogen and oxygen liquid level balance, then exit the step of executing the oxygen side regulating valve, the temperature regulating valve and all pneumatic ball valves to automatically increase the current, automatically increase the temperature, automatically increase the pressure, automatically maintain the hydrogen and oxygen liquid level balance, automatically control the alkali liquid pump, automatically control the product gas delivery / venting, automatically replenish water and automatically drain, the rectifier cabinet is shut down, and the alkaline water electrolysis hydrogen production device enters the shutdown state. After troubleshooting, enter the step of checking and confirming that all the start-up conditions are met, and the control system automatically switches the electrolyzer from the shutdown state to the standby state; After starting, if the alkaline water electrolysis hydrogen production device reaches a full-load stable operation state and the operating parameters are all within the preset normal range, the one-button start is completed.

2. The one-button start method of the alkaline water electrolysis hydrogen production device according to claim 1, characterized in that: The oxygen side regulating valve, temperature regulating valve and all pneumatic ball valves are automatically included: The control system switches the oxygen side regulating valve and the temperature regulating valve into automatic mode, switches the hydrogen side regulating valve into cascade mode, and switches all the pneumatic ball valves and solenoid valves in the hydrogen production device into automatic mode.

3. The one-button start method of the alkaline water electrolysis hydrogen production device according to claim 1, characterized in that: The automatic current increase includes: The rectifier cabinet starts automatically or delays starting in automatic mode, and the control system automatically increases the operating current setting value of the electrolytic cell according to a preset current increase rate. The control system then outputs the operating current setting value to the rectifier cabinet, and the rectifier cabinet provides direct current to the electrolytic cell according to the operating current setting value of the control system until the actual current value of the provided direct current reaches the rated current value of the electrolytic cell.

4. The one-button start method of the alkaline water electrolysis hydrogen production device according to claim 1, characterized in that: The automatic temperature rise comprises: The temperature setting value of the hydrogen production device is automatically set by the control system as the temperature value under rated working conditions; The actual temperature of the hydrogen production device is compared with the temperature set value of the hydrogen production device, and the opening of the circulating cooling water regulating valve is automatically controlled by the PID controller until the actual temperature of the hydrogen production device rises to the temperature value under the rated working conditions.

5. The one-button start method of the alkaline water electrolysis hydrogen production device according to claim 4, characterized in that: The automatic boost includes: The pressure setting value of the hydrogen production device is automatically set by the control system to the pressure value under rated working conditions; The actual pressure of the hydrogen production device is compared with the pressure set value of the hydrogen production device, and the control system gradually changes the pressure set value of the hydrogen production device according to the set pressure increase rate, and then automatically controls the opening of the oxygen side regulating valve through the PID controller until the actual pressure of the hydrogen production device rises to the pressure value under the rated operating conditions.

6. The one-button start method of the alkaline water electrolysis hydrogen production device according to claim 4, characterized in that: The automatic maintenance of hydrogen and oxygen liquid level balance includes: The control system automatically puts the hydrogen separator liquid level, oxygen separator liquid level and hydrogen side regulating valve into cascade control, and automatically controls the opening of the hydrogen side regulating valve through the PID controller to automatically eliminate the hydrogen and oxygen separator liquid level difference.

7. The one-button start method of the alkaline water electrolysis hydrogen production device according to claim 1, characterized in that: The automatic control lye pump comprises: The control system switches the motor of the alkali liquid pump to automatic mode. If the alkali liquid pump is a variable frequency pump, the frequency converter is also switched to automatic mode, and the alkali liquid pump operates according to the control instructions sent by the control system; The control system issues an alkali liquid pump stop instruction after the alkaline electrolytic cell is shut down and reaches the cooling and temperature equalization requirements, and automatically sets the frequency value according to the alkali liquid flow set value during the operation of the electrolytic cell.

8. The one-button start method of the alkaline water electrolysis hydrogen production device according to claim 1, characterized in that: The automatic control of product gas delivery / venting includes: The control system automatically turns on the solenoid valves for sending / venting the product gases on both sides of hydrogen and oxygen; When the delivery conditions preset by the control system are not met, the product gas delivery solenoid valve is automatically closed and the product gas venting solenoid valve is opened; When the delivery conditions preset by the control system are met, the product gas delivery solenoid valve is automatically opened and the venting solenoid valve is closed at the same time.

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