One-key starting system and method for alkaline water electrolysis hydrogen production device

Abstract

The invention discloses a one-key starting system and method for an alkaline water electrolysis hydrogen production device, the system comprises a control system and a one-key starting control unit, and the control system is connected with the one-key starting control unit; the one-key start control unit comprises a standby panel soft button, a start panel soft button, a make-up pump selection soft button and a drainage panel soft button; therefore, the whole starting process of the alkaline water electrolysis hydrogen production device is subjected to sequential control integration, a safe and efficient one-key starting scheme with high automation degree is formed, safety risks in the manual starting process are avoided, manpower is saved, the labor cost is reduced, meanwhile, the starting time is shortened, unnecessary energy waste in the starting process is reduced, and the starting efficiency is improved. Therefore, the problems that the starting speed of the cluster electrolytic cell is low and the starting operation difficulty of the cluster electrolytic cell is high due to human factors in a large-scale electrolytic hydrogen production project are solved.

Description

Technical Field

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

[0002] Due to its high technology maturity, low equipment cost, large single-cell gas production, durability and long life, the alkaline electrolytic water hydrogen production technology has become the preferred solution in the field of large-scale electrolytic water hydrogen production. Alkaline electrolytic water hydrogen production devices generally involve control objects such as regulating valves, pneumatic ball valves, solenoid valves, and pump motors. Their opening / closing or starting / stopping need to be executed according to set actions. Currently, alkaline electrolyzers generally adopt a pure manual control mode or a semi-automatic control mode for startup, and the startup process consists of multiple operations. These two control modes are completely or partially manually operated by operators according to on-site display instruments or remote transmission instruments in the control room. The development difficulty of its control system is low, but the disadvantages are as follows: Multiple people are required to participate during startup debugging, resulting in high labor costs; due to the level of operators, there are too many uncontrollable factors, leading to a decrease in operation accuracy and precision; the level of operators directly affects the equipment startup time. For an alkaline electrolyzer with a power of 5 MW, the time required to start from normal temperature to the rated working temperature is usually 1.5 - 2.0 hours, causing unnecessary energy waste; especially for large-scale electrolytic water hydrogen production projects, the number of electrolyzers is large, the operation is more complex, and most require rapid startup in response to changes in renewable energy output. The current pure manual or semi-automatic startup methods cannot meet the development needs of unmanned, less manned, and automated hydrogen production projects at all. Summary of the Invention

[0003] Embodiments of the present invention provide a one-key startup system and method for an alkaline electrolytic water hydrogen production device, aiming to solve the problems of complex operation, low operation accuracy, and low startup efficiency caused by the existing pure manual or semi-automatic startup methods.

[0004] In a first aspect, embodiments of the present invention provide a one-key startup system for an alkaline electrolytic water hydrogen production device. The system includes: a control system and a one-key startup control unit, and the control system is connected to the one-key startup control unit; the one-key startup control unit includes a standby panel soft button, a startup panel soft button, a makeup water pump selection soft button, and a drain panel soft button; wherein, the standby panel soft button is used for condition confirmation before startup; the startup panel soft button is used for one-key startup operation and process control; the makeup water pump selection soft button is used to select a controlled makeup water pump from a preset number of makeup water pumps; the drain panel soft button is used to monitor the state of the drain valve and control the drain duration and timing.

[0005] Further, 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. The signals of 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; The combustible gas and fire detection unit includes a combustible gas detector and a flame detector connected to the signal acquisition unit, which are used to detect whether there is combustible gas leakage or fire; The external auxiliary system detection unit includes the real-time value of the instrument air pressure and the real-time value of the circulating cooling water pressure connected to the signal acquisition unit, which are used to detect whether the instrument air pressure and the circulating cooling water pressure required by the hydrogen production device are normal, and the rectifier cabinet current value, rectifier cabinet voltage value, and rectifier cabinet fault / stop / enable start state connected to the signal acquisition unit; The internal detection unit of the hydrogen production device includes a temperature transmitter, a pressure transmitter, a differential pressure transmitter, a liquid level gauge, a flow meter, an on-line analyzer, a control valve positioner, a pneumatic ball valve switch, a solenoid valve switch, the start / stop / fault state of the pump, the local / remote state of the pump, and the pump frequency converter connected to the signal acquisition unit.

[0006] In a second aspect, an embodiment of the present invention provides a one-key start method for an alkaline electrolytic water hydrogen production device, which is applied to the one-key start system of the alkaline electrolytic water hydrogen production device. The method includes: Click the soft button on the standby panel to complete the pre-start inspection to determine whether the electrolytic cell in the alkaline electrolytic water hydrogen production device has entered the standby state; After checking and confirming that all start-up conditions are met, the control system automatically switches the electrolytic cell from the shutdown state to the standby state. Among them, the start-up conditions include that the hydrogen production device is qualified for replacement, the states of the rectifier cabinet, electrolytic cell, and gas-liquid separation frame are all normal, the hand valve switch state of the hydrogen production device is correct, the instrument air pressure and circulating water pressure are normal, the alkali liquid pump is running and the flow rate is normal, the make-up water pump is in manual mode, the hydrogen production device does not have any interlock information, and all interlocks of the hydrogen production device are put into use; Click the soft button on the start panel to set the control parameters; Click the start button in the soft button on the start panel to perform a secondary pop-up confirmation, and enter the execution of automatically turning on the oxygen side control valve, temperature control valve, and all pneumatic ball valves, automatically increasing the current, automatically raising the temperature, automatically raising the pressure, automatically maintaining the hydrogen-oxygen liquid level balance, automatically controlling the alkali liquid pump, automatically controlling the product gas to be sent out / vented, automatically replenishing water, and automatically draining liquid; If any interlock information appears during the execution of the automatic current increase, automatic temperature increase, automatic pressure increase, and automatic control of liquid level balance processes, the execution of the steps of putting the oxygen-side regulating valve, temperature regulating valve, and all pneumatic ball valves in automatic mode, automatic current increase, automatic temperature increase, automatic pressure increase, automatic maintenance of hydrogen-oxygen liquid level balance, automatic control of the lye pump, automatic control of product gas delivery / venting, automatic water replenishment, and automatic liquid drainage shall be exited. The rectifier cabinet shall be shut down, and the alkaline water electrolysis hydrogen production device shall enter the shutdown state. After troubleshooting, when it is confirmed that the start-up conditions are all met, the control system shall automatically switch the electrolyzer from the shutdown state to the standby state; After starting up, if the alkaline water electrolysis hydrogen production device reaches the full-load stable operation state and all operating parameters are within the preset normal range, the one-key start-up shall end.

[0007] Furthermore, the step of putting the oxygen-side regulating valve, temperature regulating valve, and all pneumatic ball valves in automatic mode includes: The control system puts the oxygen-side regulating valve and the temperature regulating valve in automatic mode, puts the hydrogen-side regulating valve in cascade control, and switches all pneumatic ball valves and solenoid valves in the hydrogen production device to the automatic mode.

[0008] Furthermore, the automatic current increase includes: The rectifier cabinet starts immediately or with a delay in the automatic mode. The control system automatically increases the operating current set value of the electrolyzer step by step according to the preset current increase rate, and then the control system outputs the operating current set value to the rectifier cabinet. The rectifier cabinet provides direct current to the electrolyzer according to the operating current set value of the control system until the actual current value of the provided direct current reaches the rated current value of the electrolyzer.

[0009] Furthermore, the automatic temperature increase includes: The control system automatically sets the temperature set value of the hydrogen production device to the temperature value under the rated working condition; The actual temperature of the hydrogen production device is compared with the temperature set value of the hydrogen production device, and the opening degree of the circulating cooling water regulating valve is automatically controlled through a PID controller until the actual temperature of the hydrogen production device rises to the temperature value under the rated working condition.

[0010] Furthermore, the automatic pressure increase includes: The control system automatically sets the pressure set value of the hydrogen production device to the pressure value under the rated working condition; The actual pressure of the hydrogen production device is compared with the pressure set value of the hydrogen production device. 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 degree 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 condition.

[0011] Furthermore, the automatic maintenance of the hydrogen-oxygen liquid level balance includes: The control system automatically puts the liquid levels of the hydrogen separator and the oxygen separator and the hydrogen-side regulating valve in cascade control, and automatically controls the opening degree of the hydrogen-side regulating valve through the PID controller to automatically eliminate the liquid level difference between the hydrogen and oxygen separators.

[0012] Furthermore, the automatic control of the lye pump includes: The control system switches the motor of the operating lye pump to the automatic mode. If the operating lye pump is a variable-frequency pump, the frequency converter is also switched to the automatic mode, and the operating lye pump operates according to the control instructions sent by the control system; Wherein, the control system issues a stop instruction for the lye pump after the alkaline electrolyzer stops operating and meets the requirements of temperature reduction and temperature equalization, and automatically sets the frequency value according to the set value of the lye flow rate during the operation of the electrolyzer.

[0013] Furthermore, the automatic control of the product gas sending / venting includes: The control system puts the solenoid valves for sending / venting the product gas on both the hydrogen and oxygen sides in automatic mode; When the external sending conditions preset by the control system are not met, the product gas sending solenoid valve is automatically closed and the product gas venting solenoid valve is opened; When the external sending conditions preset by the control system are reached, the product gas sending solenoid valve is automatically opened and the venting solenoid valve is closed simultaneously.

[0014] An embodiment of the present invention provides a one-key startup system and method for an alkaline electrolytic water hydrogen production device. The system includes: a control system and a one-key startup control unit, and the control system is connected to the one-key startup control unit; the one-key startup control unit includes a standby panel soft button, a startup panel soft button, a makeup water pump selection soft button, and a drain panel soft button; thereby integrating the entire startup process of the alkaline electrolytic water hydrogen production device in sequence control, forming a one-key startup solution with high automation, safety and efficiency, avoiding safety risks during manual startup, saving manpower, reducing labor costs, shortening the startup time, and reducing unnecessary energy waste during startup, thus solving the problems of slow startup speed and large startup operation difficulty of cluster electrolyzers caused by human factors in large-scale electrolytic hydrogen production projects. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 A schematic block diagram of the one - key startup system for the alkaline electrolyzed water hydrogen production device provided by the embodiment of the present invention; Figure 2 A schematic flow diagram of the one - key startup method for the alkaline electrolyzed water hydrogen production device provided by the embodiment of the present invention; Figure 3 A schematic flow diagram of the pre - startup inspection in the one - key startup method for the alkaline electrolyzed water hydrogen production device provided by the embodiment of the present invention; Figure 4 A schematic diagram of the sequential control logic of the one - key startup method for the alkaline electrolyzed water hydrogen production device provided by the embodiment of the present invention; Figure 5 A schematic diagram of the startup result of the one - key startup method for the alkaline electrolyzed water hydrogen production device provided by the embodiment of the present invention. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0019] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0020] It should be further understood that the term " / and" used in this specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0021] For a clearer understanding of the technical solutions of this application, the present invention will be described in detail through specific embodiments below.

[0022] Please refer to Figure 1, in the first aspect of the embodiment of the present invention, a one - key start - up system for an alkaline electrolyzed water hydrogen production device is provided. The system includes: a control system 110 and a one - key start - up control unit 120, and the control system 110 is connected to the one - key start - up control unit 120; the one - key start - up control unit 120 includes a standby panel soft button, a start - up panel soft button, a make - up water pump selection soft button, and a drain panel soft button; among them, the standby panel soft button is used for condition confirmation before starting the machine; the start - up panel soft button is used for one - key start - up operation and process control; the make - up water pump selection soft button is used to select a controlled make - up water pump from a preset number of make - up water pumps; the drain panel soft button is used to monitor the state of the drain valve and control the drain duration and timing.

[0023] The system further includes a combustible gas and fire detection unit 130, an external auxiliary system detection unit 140, an internal detection unit 150 of the hydrogen production device, 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, and the signals of the combustible gas and fire detection unit 130, the external auxiliary system detection unit 140, and the internal detection unit 150 of the hydrogen production device are all connected to the signal acquisition unit 170; The combustible gas and fire detection unit 130 includes a combustible gas detector and a flame detector connected to the signal acquisition unit 170, which are used to detect whether there is combustible gas leakage or fire; The external auxiliary system detection unit 140 includes a real - time value of instrument air pressure and a real - time value of circulating cooling water pressure connected to the signal acquisition unit 170, which are used to detect whether the instrument air pressure and the circulating cooling water pressure required by the hydrogen production device are normal, and a rectifier cabinet current value, a rectifier cabinet voltage value, and a rectifier cabinet fault / shutdown / start - up permission status connected to the signal acquisition unit 170; The internal detection unit 150 of the hydrogen production device includes a temperature transmitter, a pressure transmitter, a differential pressure transmitter, a liquid level gauge, a flow meter, an on - line analyzer, a control valve positioner, a pneumatic ball valve switch, a solenoid valve switch, a start / stop / fault status of the pump, a local / remote status of the pump, and a pump frequency converter connected to the signal acquisition unit 170.

[0024] Preferably, the preset number of make - up water pumps is two make - up water pumps in this embodiment, and one of them is a standby make - up water pump shared by multiple sets of alkaline electrolyzed hydrogen production systems.

[0025] Preferably, the control system 110 can be a DCS control system 110 (including an SIS system) or a PLC control system 110.

[0026] Preferably, the detection objects of the internal detection unit 150 of the hydrogen production device include the electrolytic cell, the gas-liquid separation frame, all the pumps, valves and measuring instruments related to the water replenishment and alkali preparation system.

[0027] Preferably, the detection objects of the internal detection unit 150 of the hydrogen production device may also include the rectifier cabinet.

[0028] Preferably, a communication interface with an external energy management system is added to the one-key startup system of the alkaline electrolytic water hydrogen production device to achieve real-time synchronization with the renewable energy power generation.

[0029] During specific implementation, first, the pre-startup inspection is completed by clicking the soft button on the standby panel to determine whether the alkaline electrolytic water hydrogen production device can enter the standby state; among them, the pre-startup inspection items of the alkaline electrolytic water hydrogen production device include: 1) The control system 110 sets a confirmation button, and after manually judging that the hydrogen production device has passed the nitrogen replacement, click the confirmation button; 2) The control system 110 sets a confirmation button, and after manually checking that the states of the relevant equipment of the hydrogen production device meet the startup conditions and all the instruments are normally put into use, click the confirmation button; among them, the states of the relevant equipment of the hydrogen production device include the state of the rectifier cabinet, the state of the electrolytic cell, and the state of the gas-liquid separation frame; 3) The control system 110 sets a confirmation button, and after manually judging that the states of all the manual valves of the hydrogen production device are correct, click the confirmation button, including all the manual valves on the gas path (hydrogen, oxygen, nitrogen), liquid path (alkali solution), and water path (circulating cooling water, condensate drainage), to ensure that all the manual valves are in the correct open / closed state according to the process requirements; 4) The control system 110 receives the signals from the external auxiliary system detection unit 140 and automatically judges whether the instrument air pressure and the circulating cooling water pressure connected to the hydrogen production device meet the process requirements; 5) The control system 110 receives the signals from the signal acquisition unit 170 and automatically judges whether the alkali solution circulation pump is running normally and whether the alkali solution flow rate is higher than the minimum flow rate requirement allowed by the alkali solution circulation pump; 6) The control system 110 receives the signals from the signal acquisition unit 170 and automatically judges whether the makeup water pump is in the manual mode; 7) The control system 110 receives the signals from the signal acquisition unit 170, and automatically checks and confirms that there is no interlock information. Among them, the interlock information includes: high-high hydrogen leakage rate, flame detector alarm, emergency stop of the hydrogen production frame, rectifier cabinet failure, emergency shutdown of the rectifier cabinet, high-high rectifier cabinet current, high-high rectifier cabinet voltage, high-high oxygen separator pressure, high-high oxygen-side product gas outlet pressure, high-high hydrogen-side product gas outlet pressure, high-high oxygen separator liquid level, low-low oxygen separator liquid level, high-high hydrogen separator liquid level, low-low hydrogen separator liquid level, high-high liquid level difference between the hydrogen and oxygen separators, high-high oxygen tank temperature, low-low caustic liquid flow rate at the outlet of the in-service caustic liquid pump, high-high hydrogen in oxygen content, high-high oxygen in hydrogen content, low-low instrument air pressure, low-low water tank liquid level; 8) The control system 110 performs self-check and confirms that all interlocks in the hydrogen production device are in use; among them, the interlocks include a combination of one or more of the following interlocks: rectifier cabinet failure interlock protection; electrolyzer operating current exceeding the rated value interlock protection; electrolyzer operating voltage exceeding the rated value interlock protection; high circulating caustic liquid temperature interlock protection; low caustic liquid circulation flow rate interlock protection; high oxygen tank temperature interlock protection; high hydrogen tank temperature interlock protection; high-low hydrogen and oxygen separator liquid level interlock protection; high oxygen tank pressure interlock protection; low hydrogen / oxygen purity interlock protection; high hydrogen / oxygen pipeline pressure interlock protection; low water tank liquid level interlock protection; power outage interlock protection; instrument air stop interlock protection.

[0030] After all the above conditions are met, the control system 110 automatically switches the electrolyzer from the shutdown state to the standby state.

[0031] Specifically, in the standby state of the electrolyzer, after pressing the start button, the control system 110 receives the start signal and starts to execute the one-key start program. The hydrogen production device automatically increases the current, temperature, and pressure according to the preset program until it reaches the full-load operation state, and automatically maintains the liquid level balance of the hydrogen and oxygen separators, automatically replenishes water, and automatically drains liquid. The hydrogen production device operates stably and completes the one-key start; 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 one 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, shuts down the rectifier cabinet interlock, and at the same time the alarm unit 160 issues an alarm. After the operator makes corresponding adjustments, the pre-start inspection is carried out again. After the electrolyzer is in the standby state, the one-key start program is entered again.

[0032] Please refer to Figures 2 to 5 , the second aspect of the embodiment of the present invention provides a one-key start method for an alkaline electrolytic water hydrogen production device, which is applied to a one-key start system for an alkaline electrolytic water hydrogen production device. The method includes the following steps S110-S160: S110. Click the soft button on the standby panel to complete the pre-start check to determine whether the electrolyzer in the alkaline electrolytic water hydrogen production device has entered the standby state; S120. After checking and confirming that all start-up conditions are met, the control system automatically switches the electrolyzer from the shutdown state to the standby state; wherein, the start-up conditions include that the hydrogen production device is qualified for replacement, the states of the rectifier cabinet, electrolyzer, gas-liquid separation frame are all normal, the hand valve switch state of the hydrogen production device is correct, the instrument air pressure and circulating water pressure are normal, the alkali liquid pump is running and the flow rate is normal, the make-up water pump is in manual mode, the hydrogen production device does not have any interlock information, and all interlocks of the hydrogen production device are put into use; S130. Click the soft button on the start-up panel to set the control parameters; S140. Click the start button on the start-up panel soft button for secondary pop-up confirmation, and enter the execution of automatically putting the oxygen side regulating valve, temperature regulating valve and all pneumatic ball valves into automatic, automatically increasing the current, automatically increasing the temperature, automatically increasing the pressure, automatically maintaining the hydrogen-oxygen liquid level balance, automatically controlling the alkali liquid pump, automatically controlling the product gas to be sent out / vented, automatically replenishing water and automatically draining liquid; S150. If any interlock information appears during the execution of the automatically increasing the current, automatically increasing the temperature, automatically increasing the pressure, and automatically controlling the liquid level balance, then exit the step of executing the oxygen side regulating valve, temperature regulating valve and all pneumatic ball valves are put into automatic, automatically increasing the current, automatically increasing the temperature, automatically increasing the pressure, automatically maintaining the hydrogen-oxygen liquid level balance, automatically controlling the alkali liquid pump, automatically controlling the product gas to be sent out / vented, automatically replenishing water and automatically draining liquid, the rectifier cabinet shuts down, and the alkaline electrolytic water hydrogen production device enters the shutdown state. After troubleshooting, enter the step of checking and confirming that all start-up conditions are met, and the control system automatically switches the electrolyzer from the shutdown state to the standby state; S160. After starting up, if the alkaline electrolytic water hydrogen production device reaches the full-load stable operation state and all operation parameters are within the preset normal range, the one-key start is completed.

[0033] During specific implementation, click the soft button on the standby panel of the control system to complete all pre-start checks; wherein, the check contents of all pre-start checks include: 1) After manually judging that the hydrogen production device has been qualified for nitrogen replacement, click the confirmation button at the "Nitrogen replacement qualified" button on the standby panel soft button of the DCS control system; 2) After manually checking that the states of the relevant equipment of the hydrogen production device meet the start-up conditions and all instruments are normally put into use, click the confirmation button at the "Equipment and instruments meet the start-up conditions" button on the standby panel soft button of the DCS control system; 3) After manually judging that all the hand valve switch states of the hydrogen production device are correct, click the confirmation button at the soft button of the standby panel of the DCS control system → "The process flow meets the start-up conditions"; among them, all the hand valve switch states of the hydrogen production device include all the hand valves on the gas path (hydrogen, oxygen, nitrogen), liquid path (alkali solution), and water path (circulating cooling water, condensate drainage), ensuring that all the hand valves are in the correct open / closed state according to the process requirements; 4) The DCS control system receives the signals from the external auxiliary system detection unit and automatically judges whether the instrument air pressure and circulating cooling water pressure connected to the hydrogen production device meet the process requirements; 5) The DCS control system receives the signals from the signal acquisition unit and automatically judges whether the alkali solution circulation pump is running normally and whether the alkali solution flow rate is higher than the minimum flow rate requirement allowed by the alkali solution circulation pump; 6) The DCS control system receives the signals from the signal acquisition unit and automatically judges whether the make-up water pump is in the manual mode; 7) The DCS control system and the SIS system receive the signals from the signal acquisition unit and automatically check and confirm that there is no interlock information; among them, the interlock information includes: high-high hydrogen leakage, flame detector alarm, emergency stop of the hydrogen production frame, rectifier cabinet failure, rectifier cabinet emergency shutdown, high-high rectifier cabinet current, high-high rectifier cabinet voltage, high-high oxygen separator pressure, high-high oxygen-side product gas outlet pressure, high-high hydrogen-side product gas outlet pressure, high-high oxygen separator liquid level, low-low oxygen separator liquid level, high-high hydrogen separator liquid level, low-low hydrogen separator liquid level, high-high hydrogen-oxygen separator liquid level difference, high-high oxygen tank temperature, low-low alkali solution flow rate at the outlet of the operating alkali solution pump, high-high hydrogen in oxygen content, high-high oxygen in hydrogen content, low-low instrument air pressure, low-low water tank liquid level; 8) The DCS control system and the SIS system perform self-checks to confirm that all interlocks are in use.

[0034] More specifically, the one-key start-up method of the alkaline electrolytic water hydrogen production device in the present invention includes: Step S0: Click the soft button on the standby panel of the control system to complete all the pre-start checks described above; among them, the step S0 corresponds to the above steps S110 and S120; if any one of the above inspection results does not meet the corresponding start-up conditions, the electrolytic cell remains in the shutdown state, and if all the inspection results meet the start-up conditions, the control system automatically switches the state of the electrolytic cell to the standby state, and then enters step S1; among them, the step S1 corresponds to the secondary pop-up confirmation operation in the above steps S130 and S140.

[0035] The step S1 includes: 1) Before the electrolyzer starts up, further click the soft buttons on the startup panel, which include control parameter settings and one-key startup operations. Among them, the control parameter settings include system operating load, system operating pressure, system pressure holding pressure, system operating temperature (the temperature of the lye at the electrolyzer inlet), current increase / decrease rate, the set value of the start-up automatic time of the make-up water pump, the set value of the make-up water interval time, the set value of the make-up water duration, the lower limit set value of the average level of the hydrogen-oxygen separator, the upper limit set value of the average level of the hydrogen-oxygen separator, the set value of the automatic pump stop time of the lye pump, the upper limit set value of the level of the hydrogen-oxygen gas-water separator, and the lower limit set value of the level of the hydrogen-oxygen gas-water separator; the start button is used for one-key starting the machine; Preferably, during the standby stage of the electrolyzer, the control system automatically obtains the current power input situation through the communication interface with the external energy management system, and dynamically adjusts the system target operating load and current increase rate to quickly match the energy output; When the electrolyzer is in the standby state, click the start button in the soft buttons on the startup panel of the control system, and then confirm through a secondary pop-up window. After clicking the confirmation, enter step S2; among them, step S2 corresponds to step S140 above to enter and execute that the oxygen-side regulating valve, temperature regulating valve, and all pneumatic ball valves are put into automatic mode, automatic current increase, automatic temperature increase, automatic pressure increase, automatic maintenance of the hydrogen-oxygen level balance, automatic control of the lye pump, automatic control of product gas external delivery / venting, automatic water make-up, and automatic liquid drainage, as well as step S150.

[0036] Step S2 includes: After one-key startup, putting the oxygen-side regulating valve, temperature regulating valve, and all pneumatic ball valves into automatic mode includes: 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 control, and switches all pneumatic ball valves and solenoid valves in the hydrogen production device to the automatic mode; After one-key startup, the automatic current increase includes: the rectifier cabinet starts immediately or with a delay in the automatic mode. The control system automatically gradually increases the operating current set value of the electrolyzer according to the pre-set current increase rate, and then the control system outputs the operating current set value to the rectifier cabinet. The rectifier cabinet provides direct current to the electrolyzer according to the operating current set value of the control system until the actual current value of the provided direct current reaches the rated current value of the electrolyzer; After one-key startup, the automatic temperature increase includes: the control system automatically gives the temperature set value of the hydrogen production device as the temperature value under the rated working condition; compares the actual temperature of the hydrogen production device with the temperature set value of the hydrogen production device, and then automatically controls the opening of the circulating cooling water regulating valve through a PID controller until the actual temperature of the hydrogen production device rises to the temperature value under the rated working condition; After one - key startup, the automatic boost - pressure process includes: the pressure - set value of the hydrogen - production device is automatically set by the control system to the pressure value under the rated working condition; comparing the actual pressure of the hydrogen - production device with the pressure - set value of the hydrogen - production device, the control system gradually changes the pressure - set value of the hydrogen - production device according to the set boost - pressure 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 condition; After one - key startup, the automatic maintenance of the hydrogen - oxygen liquid - level balance includes: the control system automatically puts the liquid levels of the hydrogen separator, oxygen separator, and the hydrogen - side regulating valve into cascade control, that is, the set value of the hydrogen - separator liquid level is equal to the actual value of the oxygen - separator liquid level. Compare the actual liquid - level value of the hydrogen separator with the set value of the hydrogen - separator liquid level, and then automatically control the opening of the hydrogen - side regulating valve through the PID controller to achieve the purpose of automatically eliminating the liquid - level difference between the hydrogen and oxygen separators; After one - key startup, the automatic control of the lye pump includes: the control system switches the motor of the in - operation lye pump to the automatic mode. If the in - operation lye pump is a variable - frequency pump, the frequency converter is also switched to the automatic mode, and then the in - operation lye pump operates according to the control instructions sent by the control system; among them, the control system issues a stop - pump instruction for the lye pump after the alkaline electrolyzer stops operating and meets the requirements of temperature reduction and temperature equalization, and automatically sets the frequency value according to the lye - flow control requirements during the operation of the electrolyzer; After one - key startup, the automatic control of the product - gas supply / venting includes: the control system puts the supply / venting solenoid valves for the product gases on the hydrogen and oxygen sides into automatic mode; when the supply conditions preset by the control system are not met, the product - gas supply solenoid valve is automatically closed and the product - gas venting solenoid valve is opened; when the supply conditions preset by the control system are reached, the product - gas supply solenoid valve is automatically opened and the venting solenoid valve is closed simultaneously.

[0037] The automatic water replenishment includes: after the rectifier cabinet starts up, the motor of the selected water replenishment pump by pressing the soft button delays for a certain time and then switches to the automatic mode. This time can be set manually, preferably the latest start - up time for water replenishment acceptable to the alkaline electrolytic water hydrogen - production device. Then the water replenishment pump starts and stops automatically according to the actual water - replenishment demand of the hydrogen - production device and the instructions sent by the control system.

[0038] The automatic liquid drainage includes: after the rectifier cabinet starts up, all the drainage valves at the bottom of the hydrogen - side gas - water separator and all the pneumatic ball valves for liquid drainage at the bottom of the oxygen - side gas - water separator open / close automatically according to the preset liquid - drainage logic.

[0039] If any interlock information appears during the processes of automatic current increase, automatic temperature increase, automatic boost - pressure, and automatic liquid - level balance control in step S2, step S2 is exited, the rectifier cabinet shuts down, and the alkaline electrolytic water hydrogen - production device enters the shutdown state. After troubleshooting, it enters step S0 again; After starting up, the alkaline electrolyzed water hydrogen production device reaches a stable full-load operation state, and all operating parameters are within the normal range, and the one-key startup ends; among them, all operating parameters include current value, temperature value, pressure value, and liquid level value.

[0040] Preferably, in the step S0, before starting the one-key startup control unit, it is necessary to first confirm that the power supply of the alkaline electrolyzed water hydrogen production device meets the startup conditions, that is, the power supply power is higher than the minimum startup power requirement of the alkaline electrolyzed water hydrogen production device; and it is necessary to confirm that the rectifier cabinet is in the standby state, that is, the cooling system of the rectifier cabinet has been put into normal use, the rectifier transformer has sent power to the rectifier cabinet, and the rectifier cabinet has completed all operating tests and can be started up normally and deliver the required direct current to the alkaline electrolyzed water hydrogen production device once it receives the startup instruction from the control system; it is necessary to confirm that the downstream of the alkaline electrolyzed water hydrogen production device has the conditions to receive hydrogen and oxygen, that is, the downstream gas purification unit has been qualified for nitrogen replacement and maintained under a slightly positive nitrogen pressure, and the pressure must be lower than the gas production pressure of the alkaline electrolyzed water hydrogen production device, the process flow inside the gas purification unit has been opened according to the startup requirements, and all auxiliary equipment and instruments of the gas purification unit have been put into use according to the startup requirements; among them, the gas purification unit is preferably arranged in the alkaline electrolyzed water hydrogen production device in this embodiment.

[0041] Preferably, in the step S1, before starting the one-key startup control unit, in order to give obvious prompts to the operator, each alkaline electrolyzed water hydrogen production device in the standby state will emit obvious prompt signals and prompt texts. For example, on the operation screen of the control system, the icon of the alkaline electrolytic cell that has been in the standby state will change from gray to blue (gray represents the shutdown state, green represents the operation state, and blue represents the standby state), and the text "Standby state" will be displayed on the electrolytic cell icon.

[0042] Preferably, in the 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 button on the start panel. After the operator clicks the pause button, if the operating current of the electrolytic cell is higher than or equal to the minimum allowable current (generally 30% of the rated current) at this time, the current set value will no longer increase but be equal to the actual current value at the time of pausing. If the operating current of the electrolytic cell is lower than the minimum allowable current at this time, the current set value will be equal to the minimum allowable current. The system pressure set value will also not change after clicking the pause button, but the control system still continues to execute the control logics of automatic temperature rise, automatic maintenance of the hydrogen-oxygen liquid level balance, automatic water replenishment, and automatic liquid drainage, and is not affected by the pause.

[0043] Preferably, in the step S1, after the operator clicks the pause button, if the operator wants to continue with the subsequent one-key startup process from the temporary pause position, the operator can click the startup button in the soft button of the startup panel. After clicking the startup button, the alkaline electrolytic water hydrogen production device will continue with the subsequent startup steps from the breakpoint position until it reaches the full-load stable operation state.

[0044] Preferably, in the step S1, if the operator wants to temporarily decide to perform a shutdown operation during the automatic execution of the startup process by the control system, a shutdown button can be added to the "startup panel". After the operator clicks the shutdown button, the alkaline electrolytic water hydrogen production device will exit the one-key startup process and immediately execute the shutdown process, that is: stop executing the automatic current increase process, and the current set value will be automatically set to "0 A"; stop executing the automatic pressure increase process, and the system pressure will be automatically set to a slightly positive pressure (such as 0.3 MPa); stop executing the automatic temperature increase process, and the temperature set value will be automatically set to 25 °C; after clicking the shutdown button, keep the lye pump running for a certain period of time until the system temperature drops to 25 °C, then the lye pump will automatically stop and remain in the pump-stopped state; stop executing the automatic water replenishment process, the makeup water pump will automatically remain in the pump-stopped state, and the makeup water valve will automatically remain closed; stop executing the automatic liquid discharge program, and all liquid discharge pneumatic ball valves or solenoid valves will remain closed; continue to execute the automatic hydrogen-oxygen liquid level balance program; stop executing the lye circulation; all regulating valves, pneumatic ball valves, and solenoid valves will still remain in the automatic mode.

[0045] Preferably, in the step S2, the operator can temporarily modify the startup completion target values of the alkaline electrolytic water hydrogen production device during the automatic execution of the startup process by the control system, 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 increase / decrease rate, the system pressure increase / decrease rate, the set value of the start time for the makeup water pump to switch to automatic mode, the set value of the time for the analytical instrument interlock to be put into use, the system liquid discharge duration and frequency set value; however, during the automatic execution of the startup process by the control system, the control logic cannot be modified to avoid safety accidents.

[0046] Preferably, a fast response mode option is set in the soft button of the startup panel. After selecting the fast response mode, when a surge in renewable energy output is detected, the control system will preferentially and quickly increase the temperature and current, and then adjust the system pressure to ensure that the hydrogen production device reaches the stable operation state as soon as possible.

[0047] Example 1 I. Basic parameters of the electrolyzer The electrolyzers used for experiments and implementations have basic parameters including but not limited to the following: Rated power (5 MW); operating current (12500 A); operating voltage (370 V); current density under rated conditions (2500 A / m²); power transmission mode (one positive and two negatives); plate diameter (2000 mm); operating pressure (1.8 MPaG); operating temperature (85°C ± 5°C); cathode and anode materials (carbon steel nickel-plated); alkali concentration (30 wt%); liquid level of gas-liquid separators on the hydrogen side and oxygen side (50%); alkali pump (constant frequency pump); alkali circulation mode (mixed type); single-sided water replenishment (hydrogen side water replenishment); II. Control system type: DCS control system (including SIS system); III. The one-key startup method is specifically as follows: 1. Inspection before startup First, the internal operator completes the pre-startup inspection by clicking the soft button on the "standby panel" to determine whether the alkaline electrolytic water hydrogen production device can enter the standby state. Among them, the inspection content specifically includes: 1) After manually judging that the hydrogen production device has passed the nitrogen replacement, click the confirmation button at the "nitrogen replacement qualified" button of the soft button on the standby panel of the DCS control system; 2) After manually checking that the relevant equipment status of the hydrogen production device meets the startup conditions and all instruments are normally put into use, click the confirmation button at the "equipment and instruments meet the startup conditions" button of the soft button on the standby panel of the DCS control system; 3) After manually judging that the opening and closing states of all manual valves of the hydrogen production device are correct, click the confirmation button at the "process flow meets the startup conditions" button of the soft button on the standby panel of the DCS control system; among them, the opening and closing states of all manual valves of the hydrogen production device include all manual valves on the gas path (hydrogen, oxygen, nitrogen), liquid path (alkali solution), and water path (circulating cooling water, condensate drainage), ensuring that all manual valves are in the correct open / closed state according to the process requirements; 4) The DCS control system receives the signals from the external auxiliary system detection unit and automatically judges whether the instrument air pressure and circulating cooling water pressure connected to the hydrogen production device meet the process requirements; 5) The DCS control system receives the signals from the signal acquisition unit and automatically judges whether the alkali circulation pump is running normally and whether the alkali flow rate is higher than the minimum flow rate requirement allowed by the alkali circulation pump; 6) The DCS control system receives the signals from the signal acquisition unit and automatically judges whether the makeup water pump is in the manual mode; 7) The DCS control system and the SIS system receive the signals from the signal acquisition unit and automatically check and confirm that there is no interlock information. Among them, the interlock information includes: high-high hydrogen leakage rate, flame detector alarm, emergency stop of the hydrogen production frame, rectifier cabinet failure, emergency shutdown of the rectifier cabinet, high-high rectifier cabinet current, high-high rectifier cabinet voltage, high-high oxygen separator pressure, high-high oxygen-side product gas outlet pressure, high-high hydrogen-side product gas outlet pressure, high-high oxygen separator liquid level, low-low oxygen separator liquid level, high-high hydrogen separator liquid level, low-low hydrogen separator liquid level, high-high oxygen-hydrogen separator liquid level difference, high-high oxygen tank temperature, low-low caustic liquid flow rate at the outlet of the operating caustic liquid pump, high-high hydrogen in oxygen content, high-high oxygen in hydrogen content, low-low instrument air pressure, low-low water tank liquid level; 8) The DCS control system and the SIS system perform self-check and confirm that all interlocks are in use; 2. The step S0: After checking and confirming that all start-up conditions are met, the DCS control system automatically switches the electrolyzer from the shutdown state to the standby state; 3. Step S1: 1) Click the soft button "Start Panel" to set the control parameters. Set the operating load of the control system to 100%, set the operating pressure of the alkaline electrolytic water hydrogen production device to 1.8 MPaG, set the pressure holding pressure of the alkaline electrolytic water hydrogen production device to 0.3 MPa, set the operating temperature (alkali liquid temperature at the electrolyzer inlet) of the alkaline electrolytic water hydrogen production device to 90 °C, set the current increase / decrease rate to ≤0.2% of the rated current / s, set the start-up automatic time of the make-up water pump to 15 minutes after the rectifier cabinet starts, set the make-up water interval time to 20 minutes, set the make-up water duration to 10 minutes, set the lower limit of the average liquid level of the oxygen-hydrogen separator to 48%, set the upper limit of the average liquid level of the oxygen-hydrogen separator to 52%, set the automatic stop time of the caustic liquid pump to 1 hour after the rectifier cabinet is powered off, set the upper limit value of the liquid level of the hydrogen-side gas-water separator and the oxygen-side gas-water separator to 50%, and set the lower limit value of the liquid level of the hydrogen-side gas-water separator and the oxygen-side gas-water separator to 20%; 2) In the standby state of the electrolyzer, click the start button in the soft button "Start Panel" of the control system, then confirm through a secondary pop-up window, and click confirm to enter step S2; 4. Step S2: 1) After one-key start, the DCS control system puts the oxygen-side regulating valve and the temperature regulating valve in automatic mode, puts the hydrogen-side regulating valve in cascade mode. After cascade, the set value of the liquid level of the hydrogen-side gas-liquid separator changes with the actual value of the liquid level of the oxygen-side gas-liquid separator. The opening of the hydrogen-side regulating valve is controlled by the set value of the liquid level of the hydrogen-side gas-liquid separator, and all pneumatic ball valves and solenoid valves are switched to the automatic mode; 2) Automatic current increase: After one-key startup, the rectifier cabinet automatically starts after a 30-second delay in the automatic mode. The DCS control system automatically increases the current step by step to 12,500 A at a preset current increase rate (≤0.2% of the rated current per second). Then, the DCS control system outputs the current set value to the rectifier cabinet, and the rectifier cabinet supplies direct current to the electrolytic cell according to the current value given by the DCS control system until the actual current value of the supplied direct current reaches 12,500 A; 3) Automatic temperature rise: After one-key startup, the DCS control system automatically sets the temperature set value of the hydrogen production device to 90 °C under the rated condition. The actual temperature of the hydrogen production device is compared with the temperature set 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 90 °C; 4) Automatic pressure rise: After one-key startup, the DCS control system automatically sets the pressure set value of the hydrogen production device to 1.8 MPaG. The actual pressure of the hydrogen production device is compared with the pressure set value of the hydrogen production device, and then the opening of the oxygen-side regulating valve is automatically controlled by the PID controller until the actual pressure of the hydrogen production device rises to 1.8 MPaG; 5) Automatic maintenance of hydrogen-oxygen liquid level balance: After one-key startup, the DCS control system automatically puts the liquid levels of the hydrogen separator, oxygen separator, and hydrogen-side regulating valve into cascade control, that is, the liquid level set value of the hydrogen separator is equal to the actual value of the liquid level of the oxygen separator. The actual liquid level value of the hydrogen separator is compared with the liquid level set value of the hydrogen separator, and then the opening of the hydrogen-side regulating valve is automatically controlled by the PID controller to achieve the purpose of automatically eliminating the liquid level difference between the hydrogen and oxygen separators; 6) Automatic control of the lye pump: After one-key startup, the DCS control system switches the motor of the operating lye pump to the automatic mode, and then the operating lye pump runs according to the control instructions sent by the control system. The control system issues a stop pump instruction for the lye pump 1 hour after the rectifier cabinet is powered off; 7) Automatic control of product gas external supply / venting: After one-key startup, the DCS control system puts the hydrogen-side product gas external supply / venting solenoid valve into automatic control. When the hydrogen external supply conditions preset by the DCS control system are not met (oxygen in hydrogen ≥ 0.8%, or the electrolytic cell is shut down, or the rectifier cabinet is powered off, or the absolute value of the liquid level difference between the hydrogen and oxygen separators ≥ 50 mm, or the hydrogen external supply pressure ≤ 1.6 MPaG, or the hydrogen external supply pressure ≥ 1.9 MPaG), the product hydrogen external supply solenoid valve is automatically closed and the product gas vent valve is opened. When the preset external supply conditions are reached, the product hydrogen external supply solenoid valve is automatically opened and the product gas vent valve is closed at the same time; The oxygen-side product gas is directly vented; 8) Automatic water replenishment: After the rectifier cabinet starts, the water replenishment pump motor is switched to the automatic mode with a 15-minute delay through the DCS control system. Then, when the average level of the hydrogen-oxygen separator is lower than the lower limit value of 48%, the water replenishment pump starts automatically and the water replenishment solenoid valve opens automatically. The system is replenished with water once every 20 minutes for 10 minutes until the average level of the hydrogen-oxygen separator is lower than the upper limit value of 52%, at which point the water replenishment solenoid valve is closed and the water replenishment pump is shut down; 9) Automatic liquid drainage: After the rectifier cabinet starts, when the level of the hydrogen-side gas-water separator ≥ 50%, all the pneumatic drain valves at the bottom of the hydrogen-side gas-water separator open for liquid drainage until the level of the hydrogen-side gas-water separator ≤ 20%, at which point all the pneumatic drain valves at the bottom of the hydrogen-side gas-water separator are closed; when the level of the oxygen-side gas-water separator ≥ 50%, all the pneumatic drain valves at the bottom of the oxygen-side gas-water separator open for liquid drainage until the level of the oxygen-side gas-water separator ≤ 20%, at which point all the pneumatic drain valves at the bottom of the oxygen-side gas-water separator are closed; 10) If any interlock information appears during the processes of automatic current increase, automatic temperature increase, automatic voltage increase, and automatic maintenance of liquid level balance, step S2 is exited, the rectifier cabinet shuts down, and the alkaline electrolytic water hydrogen production device enters the shutdown state. After troubleshooting, it enters step S0 again; 11) After starting up, when the alkaline electrolytic water hydrogen production device reaches the full-load stable operation state and all operating parameters are within the normal range, the one-key startup ends.

[0048] IV. One-key startup effect: In this embodiment, it takes only 42 minutes for the hydrogen production device to reach the rated gas production volume (1000 standard cubic meters per hour) from the shutdown state, 37 minutes for the hydrogen content in oxygen to meet the standard (≤ 1.5%), and 63 minutes for the temperature of the electrolytic cell to rise from 20°C to the rated operating temperature of 85°C. Therefore, this embodiment shows that after adopting the one-key startup method for the alkaline electrolytic water hydrogen production device, the cold startup time of the alkaline electrolytic water hydrogen production device to the full-load operation state is shortened to 63 minutes. Compared with the cold startup time of 1.5 - 2 hours under manual operation, the startup speed is significantly improved, and the adaptability of the system to renewable energy is enhanced.

[0049] Table 1 Cold startup response time table of the hydrogen production device (electrolytic cell startup temperature 20°C)

[0050] The present invention realizes the sequential control integration of the entire startup process of the alkaline electrolytic water hydrogen production device, forming a highly automated, safe and efficient one-key startup solution, avoiding the safety risks during the manual startup process, saving manpower, reducing labor costs, shortening the startup duration, and reducing unnecessary energy waste during the startup process, thus solving the problems of slow startup speed and large startup operation difficulty of cluster electrolytic cells caused by human factors in large-scale electrolytic hydrogen production projects.

[0051] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. One - key startup system for an alkaline electrolyzed water hydrogen production device, characterized in that, The system includes: a control system and a one - key start control unit, where the control system is connected to the one - key start control unit; the one - key start control unit includes a standby panel soft button, a start panel soft button, a make - up water pump selection soft button, and a liquid discharge panel soft button; among them, the standby panel soft button is used for condition confirmation before starting the machine; the start panel soft button is used for one - key start operation and process control; the make - up water pump selection soft button is used to select a controlled make - up water pump from a preset number of make - up water pumps; the liquid discharge panel soft button is used to monitor the state of the liquid discharge valve and control the liquid discharge duration and timing.

2. The one-key startup system of the alkaline electrolyzed water hydrogen production device according to claim 1, wherein, 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 signals of 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; The combustible gas and fire detection unit includes a combustible gas detector and a flame detector connected to the signal acquisition unit, which are used to detect whether there is combustible gas leakage or fire; The external auxiliary system detection unit includes the real - time value of the instrument air pressure and the real - time value of the circulating cooling water pressure connected to the signal acquisition unit, which are used to detect whether the instrument air pressure and the circulating cooling water pressure required by the hydrogen production device are normal, and the rectifier cabinet current value, rectifier cabinet voltage value, and rectifier cabinet fault / shutdown / start - up permitted status connected to the signal acquisition unit; The internal detection unit of the hydrogen production device includes a temperature transmitter, a pressure transmitter, a differential pressure transmitter, a liquid level gauge, a flow meter, an on - line analyzer, a control valve positioner, a pneumatic ball valve switch, a solenoid valve switch, the start / stop / fault status of the pump, the local / remote status of the pump, and the pump frequency converter connected to the signal acquisition unit.

3. A one-key startup method for an alkaline electrolyzed water hydrogen production device, which is applied to a one-key startup system for an alkaline electrolyzed water hydrogen production device, is characterized in that, The method includes: Click the standby panel soft button to complete the pre - start check to determine whether the electrolytic cell in the alkaline electrolytic water hydrogen production device enters the standby state; After checking and confirming that all start - up conditions are met, the control system automatically switches the electrolytic cell from the shutdown state to the standby state; where the start - up conditions include that the hydrogen production device replacement is qualified, the states of the rectifier cabinet, electrolytic cell, and gas - liquid separation frame are all normal, the hand valve switch state of the hydrogen production device is correct, the instrument air pressure and circulating water pressure are normal, the alkali liquid pump is running and the flow rate is normal, the make - up water pump is in manual mode, the hydrogen production device does not have any interlock information, and all interlocks of the hydrogen production device are put into use; Click the start panel soft button to set the control parameters; Click the start button in the start panel soft button for secondary pop - up confirmation, and enter the execution of automatically putting the oxygen - side control valve, temperature control valve, and all pneumatic ball valves into automatic, automatically increasing the current, automatically raising the temperature, automatically raising the pressure, automatically maintaining the hydrogen - oxygen liquid level balance, automatically controlling the alkali liquid pump, automatically controlling the product gas to be sent out / vented, automatically replenishing water, and automatically discharging liquid; 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 process, the execution of the steps of putting the oxygen side regulating valve, the temperature regulating valve, and all pneumatic ball valves into automatic, the automatic current increase, the automatic temperature increase, the automatic pressure increase, the automatic maintenance of the hydrogen-oxygen liquid level balance, the automatic control of the lye pump, the automatic control of the product gas delivery / venting, the automatic water replenishment, and the automatic liquid drainage shall be exited, the rectifier cabinet shall be shut down, and the alkaline electrolytic water hydrogen production device shall enter the shutdown state. After the fault is eliminated, when it is confirmed that all the start-up conditions are met in the subsequent steps, the control system will automatically switch the electrolytic cell from the shutdown state to the standby state; After starting up, if the alkaline electrolytic water hydrogen production device reaches the full-load stable operation state and all the operating parameters are within the preset normal range, the one-key start-up is completed.

4. The one-key startup method of the alkaline electrolyzed water hydrogen production device according to claim 3, characterized in that The steps of putting the oxygen side regulating valve, the temperature regulating valve, and all pneumatic ball valves into automatic include: The control system puts the oxygen side regulating valve and the temperature regulating valve into automatic, puts the hydrogen side regulating valve into cascade control, and switches all the pneumatic ball valves and solenoid valves in the hydrogen production device to the automatic mode.

5. The one-key startup method of the alkaline electrolyzed water hydrogen production device according to claim 3, characterized in that The automatic current increase includes: The rectifier cabinet starts automatically immediately or with a delay in the automatic mode. The control system automatically increases the operating current set value of the electrolytic cell step by step according to the preset current increase rate, and then the control system outputs the operating current set value to the rectifier cabinet. The rectifier cabinet provides direct current to the electrolytic cell according to the operating current set value of the control system until the actual current value of the provided direct current reaches the rated current value of the electrolytic cell.

6. The one-key startup method of the alkaline electrolyzed water hydrogen production device according to claim 3, characterized in that The automatic temperature increase includes: The control system automatically sets the temperature set value of the hydrogen production device to the temperature value under the rated working condition; 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 a PID controller until the actual temperature of the hydrogen production device rises to the temperature value under the rated working condition.

7. The one-key start method of the alkaline electrolyzed water hydrogen production device according to claim 6, characterized in that The automatic pressure increase includes: The control system automatically sets the pressure set value of the hydrogen production device to the pressure value under the rated working condition; The actual pressure of the hydrogen production device is compared with the pressure set value of the hydrogen production device. 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 working condition.

8. The one-key startup method of the alkaline electrolyzed water hydrogen production device according to claim 6, characterized in that, The automatic maintenance of the hydrogen-oxygen liquid level balance includes: The control system automatically puts the liquid levels of the hydrogen separator, the oxygen separator, and the 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 liquid level difference between the hydrogen and oxygen separators.

9. The one-key start method of the alkaline electrolyzed water hydrogen production device according to claim 3, characterized in that, The automatic control of the lye pump includes: The control system switches the motor of the operating lye pump to the automatic mode. If the operating lye pump is a variable-frequency pump, the frequency converter is also switched to the automatic mode, and the operating lye pump operates according to the control instructions sent by the control system; Among them, after the alkaline electrolyzer stops running and meets the requirements of temperature reduction and temperature equalization, the control system issues a pump stop command for the lye pump, and automatically sets the frequency value according to the lye flow rate set value during the operation of the electrolyzer.

10. The one-key start method of the alkaline electrolyzed water hydrogen production device according to claim 3, characterized in that, The automatic control of product gas delivery / venting includes: The control system puts the solenoid valves for product gas delivery / venting on both the hydrogen and oxygen sides into automatic mode; 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; After the delivery conditions preset by the control system are reached, the product gas delivery solenoid valve is automatically opened and the venting solenoid valve is closed simultaneously.

Images