CN116356346A - Hydrogen production system and hydrogen production system control method - Google Patents

Hydrogen production system and hydrogen production system control method Download PDF

Info

Publication number
CN116356346A
CN116356346A CN202310343346.0A CN202310343346A CN116356346A CN 116356346 A CN116356346 A CN 116356346A CN 202310343346 A CN202310343346 A CN 202310343346A CN 116356346 A CN116356346 A CN 116356346A
Authority
CN
China
Prior art keywords
hydrogen production
actual
liquid level
hydrogen
oxygen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310343346.0A
Other languages
Chinese (zh)
Inventor
古俊杰
杨福源
葛云唐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsinghua University
Original Assignee
Tsinghua University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tsinghua University filed Critical Tsinghua University
Priority to CN202310343346.0A priority Critical patent/CN116356346A/en
Publication of CN116356346A publication Critical patent/CN116356346A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/02—Process control or regulation
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
    • C25B15/083—Separating products
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
    • G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Automation & Control Theory (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

The invention relates to the field of hydrogen production by water electrolysis, in particular to a hydrogen production system and a hydrogen production system control method. The hydrogen production system comprises: the hydrogen production equipment is used for ionizing water to generate hydrogen and oxygen; the control equipment is used for acquiring a first actual pressure and a first actual liquid level corresponding to one side of the hydrogen production equipment for generating oxygen and a second actual liquid level corresponding to one side of the hydrogen production equipment for generating hydrogen, and monitoring the actual current variation corresponding to the hydrogen production equipment in real time; the control device is also used for controlling the hydrogen production device according to the first actual pressure, the first actual liquid level, the second actual liquid level and the actual current variation so as to ensure the safety of the hydrogen production device. Thereby ensuring that the pressure balance and the liquid level balance of the side generating oxygen and the side generating hydrogen can be maintained at the working time of the hydrogen production system. The method can avoid the situation that the hydrogen yield possibly changes drastically at any time, so that the safety risk of the hydrogen production system exceeds the safety threshold value, and the safety risk of the hydrogen production system is caused.

Description

Hydrogen production system and hydrogen production system control method
Technical Field
The invention relates to the field of hydrogen production by water electrolysis, in particular to a hydrogen production system and a hydrogen production system control method.
Background
When the electrolytic water hydrogen production system works, alkali liquor enters from an inlet of the electrolytic tank, oxygen is generated at an anode of the electrolytic tank, hydrogen is generated at a cathode of the electrolytic tank, a large amount of heat is generated in the electrolytic tank, the alkali liquor is required to be circulated continuously to take away gas and heat, part of the alkali liquor and the hydrogen form two-phase flow to flow out from an outlet of the cathode of the electrolytic tank, and part of the alkali liquor and the oxygen form two-phase flow to flow out from an outlet of the anode of the electrolytic tank.
Since the anode consumes OH-in the cell and the cathode generates OH-, the bottoms of the two separators are in communication to form a U-tube in order to balance the concentration of the re-entering cell. In an actual hydrogen production system, the hydrogen side separator and the oxygen side separator are identical in size and identical in installation height. Because the separators form U-shaped pipes, when the pressure in the two separators is different, the liquid level difference is formed, and when the liquid level difference is overlarge, the gas on one side possibly enters the other side of the separators through the bottom pipeline, so that the hydrogen-oxygen mixture is extremely easy to explode to threaten the safety of systems and personnel. Therefore, when the electrolytic water hydrogen production system works, the balance of the pressure and the liquid level at two sides is required to be maintained (the liquid level difference is generally smaller than 10 mm).
Therefore, how to maintain the balance of the pressure and the liquid level at two sides when the electrolytic water hydrogen production system works becomes a problem to be solved urgently.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a hydrogen production system and a control method thereof, which aim to solve the problem that how to maintain the balance of pressure and liquid level at two sides when the electrolytic water hydrogen production system works in the prior art is to be solved.
According to a first aspect, an embodiment of the present invention provides a hydrogen production system, comprising: hydrogen production apparatus and control apparatus, wherein:
the hydrogen production equipment is used for ionizing water to generate hydrogen and oxygen;
the control equipment is used for acquiring a first actual pressure and a first actual liquid level corresponding to one side of the hydrogen production equipment for generating oxygen and a second actual liquid level corresponding to one side of the hydrogen production equipment for generating hydrogen, and monitoring the actual current variation corresponding to the hydrogen production equipment in real time;
the control device is also used for controlling the hydrogen production device according to the first actual pressure, the first actual liquid level, the second actual liquid level and the actual current variation so as to ensure the safety of the hydrogen production device.
The hydrogen production equipment in the hydrogen production system provided by the embodiment of the invention is used for ionizing water to generate hydrogen and oxygen; the control equipment is used for acquiring a first actual pressure and a first actual liquid level corresponding to one side of the hydrogen production equipment for generating oxygen and a second actual liquid level corresponding to one side of the hydrogen production equipment for generating hydrogen, and monitoring the actual current variation corresponding to the hydrogen production equipment in real time; the control device is also used for controlling the hydrogen production device according to the first actual pressure, the first actual liquid level, the second actual liquid level and the actual current variation, so that the pressure balance and the liquid level balance of the side generating oxygen and the side generating hydrogen can be ensured to be maintained at the working time of the hydrogen production system. In addition, because the control equipment is also used for controlling the hydrogen production equipment according to the actual current variation, the phenomenon that the first actual pressure and the first actual liquid level corresponding to the side of the hydrogen production equipment for generating oxygen and the second actual liquid level corresponding to the side of the hydrogen production equipment for generating oxygen are controlled in hysteresis can be avoided, and further the fluctuation of the first actual pressure, the second actual pressure, the first actual liquid level and the second actual liquid level exceeds a safety threshold value, so that the safety risk of the hydrogen production system exceeds the safety threshold value, and the safety risk of the hydrogen production system is caused.
With reference to the first aspect, in a first implementation manner of the first aspect, the control device is configured to obtain a preset current variation threshold corresponding to the hydrogen production device;
comparing the actual current variation with a preset current variation threshold;
when the actual current variation is larger than a preset current variation threshold, calculating hydrogen production rate variation corresponding to the hydrogen production equipment according to the actual current variation;
and adjusting an oxygen side adjusting valve and a hydrogen side adjusting valve corresponding to the hydrogen production equipment according to the hydrogen production rate variation.
The hydrogen production system provided by the embodiment of the invention obtains the preset current variation threshold corresponding to the hydrogen production equipment; the actual current variation is compared with a preset current variation threshold, so that the accuracy of the obtained comparison result is ensured. When the actual current variation is larger than the preset current variation threshold, calculating the hydrogen production rate variation corresponding to the hydrogen production equipment according to the actual current variation, and ensuring the accuracy of the calculated hydrogen production rate variation corresponding to the hydrogen production equipment. Then, according to the hydrogen production rate variation, the oxygen side regulating valve and the hydrogen side regulating valve corresponding to the hydrogen production equipment are regulated. Therefore, the phenomenon that the first actual pressure and the first actual liquid level corresponding to one side of the hydrogen production equipment for generating oxygen and the second actual liquid level and the second actual pressure for generating hydrogen are controlled to be lagged is avoided, and further the fluctuation of the first actual pressure, the second actual pressure, the first actual liquid level and the second actual liquid level exceeds a safety threshold value, so that the safety risk of the hydrogen production system exceeds the safety threshold value, and the safety risk of the hydrogen production system is caused.
With reference to the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the control device is configured to obtain an actual hydrogen production rate corresponding to the hydrogen production device;
and adjusting the oxygen side adjusting valve and the hydrogen side adjusting valve corresponding to the hydrogen production equipment according to the relation between the hydrogen production rate variation and the actual hydrogen production rate.
The hydrogen production system provided by the embodiment of the invention obtains the actual hydrogen production rate corresponding to the hydrogen production equipment; according to the relation between the hydrogen production rate variation and the actual hydrogen production rate, the oxygen side regulating valve and the hydrogen side regulating valve corresponding to the hydrogen production equipment are regulated, and the accuracy of regulating the oxygen side regulating valve and the hydrogen side regulating valve corresponding to the hydrogen production equipment is ensured. Therefore, the phenomenon that the first actual pressure and the first actual liquid level corresponding to one side of the hydrogen production equipment for generating oxygen and the second actual liquid level and the second actual pressure for generating hydrogen are controlled to be lagged is avoided, and further the fluctuation of the first actual pressure, the second actual pressure, the first actual liquid level and the second actual liquid level exceeds a safety threshold value, so that the safety risk of the hydrogen production system exceeds the safety threshold value, and the safety risk of the hydrogen production system is caused.
With reference to the first embodiment of the first aspect, in a third embodiment of the first aspect, the control device is further configured to obtain a first set pressure corresponding to a side of the hydrogen production system where oxygen is generated; the oxygen side regulating valve is regulated according to the difference between the first actual pressure and the first set pressure.
The hydrogen production system provided by the embodiment of the invention obtains a first set pressure corresponding to one side of the hydrogen production system, which generates oxygen; according to the difference between the first actual pressure and the first set pressure, the oxygen side regulating valve is regulated, and the accuracy of regulating the oxygen side regulating valve is ensured. Thereby ensuring the pressure balance at the two sides of the hydrogen production equipment.
With reference to the first embodiment of the first aspect, in a fourth embodiment of the first aspect, the control device is further configured to calculate an actual liquid level difference between the first actual liquid level and the second actual liquid level;
acquiring a set liquid level difference corresponding to the actual liquid level difference;
and adjusting the hydrogen side adjusting valve according to the difference between the actual liquid level difference and the set liquid level difference.
According to the hydrogen production system provided by the embodiment of the invention, the actual liquid level difference between the first actual liquid level and the second actual liquid level is calculated, so that the accuracy of the calculated actual liquid level difference is ensured. Acquiring a set liquid level difference corresponding to the actual liquid level difference; according to the difference between the actual liquid level difference and the set liquid level difference, the hydrogen side regulating valve is regulated, so that the accuracy of regulating the hydrogen side regulating valve is ensured, and the liquid level balance at two sides of the hydrogen production equipment can be further realized.
With reference to the first aspect, in a fifth implementation manner of the first aspect, the control device is configured to obtain a preset current variation threshold corresponding to the hydrogen production device;
comparing the actual current variation with a preset current variation threshold;
when the actual current variation is smaller than or equal to a preset current variation threshold, acquiring a first set pressure corresponding to one side of the hydrogen production system, which generates oxygen; according to the difference between the first actual pressure and the first set pressure, adjusting an oxygen side adjusting valve corresponding to the hydrogen production equipment;
calculating an actual liquid level difference between the first actual liquid level and the second actual liquid level;
acquiring a set liquid level difference corresponding to the actual liquid level difference;
and adjusting the hydrogen side regulating valve corresponding to the hydrogen production equipment according to the difference between the actual liquid level difference and the set liquid level difference.
The hydrogen production system provided by the embodiment of the invention compares the actual current variation with a preset current variation threshold; the accuracy of the obtained comparison result is ensured. When the actual current variation is smaller than or equal to a preset current variation threshold, acquiring a first set pressure corresponding to one side of the hydrogen production system, which generates oxygen; according to the difference between the first actual pressure and the first set pressure, the oxygen side regulating valve corresponding to the hydrogen production equipment is regulated, and the accuracy of regulating the oxygen side regulating valve is ensured. Thereby ensuring the pressure balance at the two sides of the hydrogen production equipment.
The actual liquid level difference between the first actual liquid level and the second actual liquid level is calculated, and the accuracy of the calculated actual liquid level difference is ensured. Acquiring a set liquid level difference corresponding to the actual liquid level difference; according to the difference between the actual liquid level difference and the set liquid level difference, the hydrogen side regulating valve is regulated, so that the accuracy of regulating the hydrogen side regulating valve is ensured, and the liquid level balance at two sides of the hydrogen production equipment can be further realized.
With reference to the first aspect, in a sixth implementation manner of the first aspect, the hydrogen production apparatus includes:
an electrolytic cell for holding water;
the power supply is connected with the electrolytic tank and is used for ionizing water in the electrolytic tank to generate hydrogen and oxygen;
the oxygen side gas-liquid separator is connected with the electrolytic tank and is used for separating oxygen and water generated by ionization;
and the hydrogen side gas-liquid separator is connected with the electrolytic tank and is used for separating hydrogen generated by ionization from water.
The hydrogen production system provided by the embodiment of the invention comprises hydrogen production equipment, wherein the hydrogen production equipment comprises: an electrolytic cell for holding water; the power supply is connected with the electrolytic tank and is used for ionizing water in the electrolytic tank; the oxygen side gas-liquid separator is connected with the electrolytic tank and is used for separating oxygen and water generated by ionization; the hydrogen side gas-liquid separator is connected with the electrolytic tank and is used for separating hydrogen generated by ionization from water, so that the ionization of the water to generate oxygen and hydrogen can be realized.
With reference to the sixth embodiment of the first aspect, in a seventh embodiment of the first aspect, the hydrogen production apparatus further includes:
the oxygen side regulating valve is used for changing the opening of the valve under the control of the control equipment so as to ensure the safety of the hydrogen production equipment;
and the hydrogen side regulating valve is used for changing the opening of the valve under the control of the control equipment so as to ensure the safety of the hydrogen production equipment.
The hydrogen production system provided by the embodiment of the invention, the hydrogen production equipment further comprises: the oxygen side regulating valve is used for changing the opening of the valve under the control of the control equipment so as to ensure the safety of the hydrogen production equipment;
the hydrogen side regulating valve is used for changing the opening of the valve under the control of the control equipment so as to ensure the safety of the hydrogen production equipment, and the control of the oxygen side regulating valve and the hydrogen side regulating valve is realized so as to ensure the liquid level balance and the pressure balance on two sides of the hydrogen production equipment, thereby ensuring the safety of the hydrogen production system.
With reference to the seventh implementation manner of the first aspect, in an eighth implementation manner of the first aspect, the hydrogen production apparatus further includes:
the oxygen side liquid level sensor is in communication connection with the control equipment and is used for measuring a first actual liquid level corresponding to the oxygen side gas-liquid separator and transmitting the first actual liquid level to the control equipment;
The hydrogen side liquid level sensor is in communication connection with the control equipment and is used for measuring a second actual liquid level corresponding to the hydrogen side gas-liquid separator and transmitting the second actual liquid level to the control equipment;
the oxygen side separator pressure transmitter is in communication connection with the control equipment and is used for measuring a first actual pressure corresponding to the oxygen side gas-liquid separator and transmitting the first actual pressure to the control equipment;
the hydrogen side separator pressure transmitter is in communication connection with the control equipment and is used for measuring a second actual pressure corresponding to the hydrogen side gas-liquid separator and transmitting the second actual pressure to the control equipment;
the current sensor is in communication connection with the control equipment and is used for measuring the actual current of the power supply in real time and transmitting the actual current to the control equipment;
the control equipment is also used for calculating the corresponding actual current variation of the hydrogen production equipment in real time according to the actual current received in real time.
The hydrogen production system provided by the embodiment of the invention, the hydrogen production equipment further comprises: the oxygen side liquid level sensor is in communication connection with the control equipment and is used for measuring a first actual liquid level corresponding to the oxygen side gas-liquid separator and transmitting the first actual liquid level to the control equipment; the accuracy of the first actual liquid level acquired by the control equipment is guaranteed. The hydrogen side liquid level sensor is in communication connection with the control equipment and is used for measuring a second actual liquid level corresponding to the hydrogen side gas-liquid separator and transmitting the second actual liquid level to the control equipment, so that the accuracy of the second actual liquid level obtained by the control equipment is ensured. And the oxygen side separator pressure transmitter is in communication connection with the control equipment and is used for measuring the first actual pressure corresponding to the oxygen side gas-liquid separator and transmitting the first actual pressure to the control equipment, so that the accuracy of the first actual pressure acquired by the control equipment is ensured. And the hydrogen side separator pressure transmitter is in communication connection with the control equipment and is used for measuring the second actual pressure corresponding to the hydrogen side gas-liquid separator and transmitting the second actual pressure to the control equipment, so that the accuracy of the second actual pressure acquired by the control equipment is ensured. The current sensor is in communication connection with the control equipment and is used for measuring the actual current of the power supply in real time and transmitting the actual current to the control equipment, and the control equipment is also used for calculating the actual current variation corresponding to the hydrogen production equipment in real time according to the actual current received in real time, so that the accuracy of the calculated actual current variation is ensured. The control device can ensure the accuracy of controlling the hydrogen production device according to the first actual pressure, the first actual liquid level, the second actual liquid level and the actual current variation. Therefore, the phenomenon that the control of the first actual pressure and the first actual liquid level corresponding to the side of the hydrogen production equipment, which generates oxygen, and the second actual liquid level and the second actual pressure corresponding to the side of the hydrogen production equipment is lagged can be avoided, and further the fluctuation of the first actual pressure, the second actual pressure, the first actual liquid level and the second actual liquid level exceeds the safety threshold value, so that the safety risk of the hydrogen production system exceeds the safety threshold value and the safety risk of the hydrogen production system is caused.
According to a second aspect, an embodiment of the present invention further provides a control method of a hydrogen production system, which is applied to the control apparatus in the hydrogen production system in the first aspect or any implementation manner of the first aspect, and the method includes:
acquiring a first actual pressure and a first actual liquid level corresponding to one side of hydrogen production equipment for producing oxygen in a hydrogen production system and a second actual liquid level corresponding to one side of hydrogen production equipment for producing hydrogen, and monitoring an actual current variation corresponding to the hydrogen production equipment in real time;
and controlling the hydrogen production equipment according to the first actual pressure, the first actual liquid level, the second actual liquid level and the actual current variation so as to ensure the safety of the hydrogen production equipment.
According to the control method of the hydrogen production system, provided by the embodiment of the invention, the first actual pressure and the first actual liquid level corresponding to one side of the hydrogen production equipment for producing oxygen in the hydrogen production system and the second actual liquid level corresponding to one side of the hydrogen production equipment are obtained, and the actual current variation corresponding to the hydrogen production equipment is monitored in real time; and controlling the hydrogen production equipment according to the first actual pressure, the first actual liquid level, the second actual liquid level and the actual current variation so as to ensure the safety of the hydrogen production equipment. Thereby ensuring that the pressure balance and the liquid level balance of the side generating oxygen and the side generating hydrogen can be maintained at the working time of the hydrogen production system. In addition, because the control equipment is also used for controlling the hydrogen production equipment according to the actual current variation, the phenomenon that the first actual pressure and the first actual liquid level corresponding to the side of the hydrogen production equipment for generating oxygen and the second actual liquid level corresponding to the side of the hydrogen production equipment for generating oxygen are controlled in hysteresis can be avoided, and further the fluctuation of the first actual pressure, the second actual pressure, the first actual liquid level and the second actual liquid level exceeds a safety threshold value, so that the safety risk of the hydrogen production system exceeds the safety threshold value, and the safety risk of the hydrogen production system is caused.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a hydrogen production system using an embodiment of the present invention;
FIG. 2 is a schematic diagram of a hydrogen production system using another embodiment of the present invention;
FIG. 3 is a control flow diagram of a control device in a hydrogen production system using an embodiment of the present invention;
FIG. 4 is a flow chart of a control method for a hydrogen production system using an embodiment of the present invention;
wherein,,
hydrogen production apparatus 1;
an electrolytic cell 11;
a power supply 12;
an oxygen-side gas-liquid separator 13;
a hydrogen-side gas-liquid separator 14;
an oxygen side regulating valve 15;
a hydrogen side regulating valve 16;
an oxygen side liquid level sensor 17;
a hydrogen side liquid level sensor 18;
an oxygen side separator pressure transmitter 19;
hydrogen side separator pressure transmitter 110;
a current sensor 111;
The control device 2.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
When the electrolytic water hydrogen production system works, alkali liquor enters from an inlet of the electrolytic tank, oxygen is generated at an anode of the electrolytic tank, hydrogen is generated at a cathode of the electrolytic tank, a large amount of heat is generated in the electrolytic tank, the alkali liquor is required to be circulated continuously to take away gas and heat, part of the alkali liquor and the hydrogen form two-phase flow to flow out from an outlet of the cathode of the electrolytic tank, and part of the alkali liquor and the oxygen form two-phase flow to flow out from an outlet of the anode of the electrolytic tank. The gas-liquid two-phase flow needs to enter a hydrogen gas-liquid separator and an oxygen side gas-liquid separator respectively to separate gas from the two-phase flow, substances at the upper part inside the separator are gas, the gas is gathered at the upper part of the separator to form gas pressure, and the gas pressure is the system pressure. The lower material in the separator is alkali liquor, and the height of the alkali liquor in the separator is called the liquid level.
Since the anode consumes OH-in the cell and the cathode generates OH-, the bottoms of the two separators are in communication to form a U-tube in order to balance the concentration of the re-entering cell. In an actual hydrogen production system, the hydrogen side separator and the oxygen side separator are identical in size and identical in installation height. Because the separators form U-shaped pipes, when the pressure in the two separators is different, the liquid level difference is formed, and when the liquid level difference is overlarge, the gas on one side possibly enters the other side of the separators through the bottom pipeline, so that the hydrogen-oxygen mixture is extremely easy to explode to threaten the safety of systems and personnel. It is therefore necessary to maintain a balance of both pressure and liquid level at all times during operation of the system (the liquid level difference should generally be less than 10 mm).
The system pressure is controlled by adjusting the outlet gas flow through the adjusting valve of the gas outlet of the oxygen side separator, and the system liquid level difference is adjusted by adjusting the outlet gas flow through the adjusting valve of the gas outlet of the hydrogen side separator. The control method is feedback control, when the pressure in the oxygen side separator deviates from the set pressure, the opening of the oxygen side regulating valve is changed to control the pressure, and when the liquid level difference deviates from the set value, the opening of the hydrogen side regulating valve is changed to regulate the liquid level.
Under the steady-state hydrogen production scene, the gas yield of the electrolytic tank is stable, the control target can be met only by means of feedback control, however, under the input of green electricity (fluctuation power), the gas yield can be changed drastically at any time, the phenomenon of pressure and liquid level control hysteresis can occur, and the pressure and liquid level fluctuation exceeds the safety margin to cause safety risk.
Accordingly, in one embodiment of the present application, as shown in FIG. 1, there is provided a hydrogen production system, hydrogen production apparatus 1 comprising: hydrogen production apparatus 1 and control apparatus 2, wherein:
hydrogen production apparatus 1 for ionizing water to produce hydrogen and oxygen.
In particular, hydrogen plant 1 may include an electrolyzer, a power source, a hydrogen collection device, and an oxygen collection device. Wherein the electrolytic cell is used for containing water. And the power supply is connected with the electrolytic tank and is used for ionizing water in the electrolytic tank so as to generate hydrogen and oxygen. The hydrogen collection device is used for collecting generated hydrogen, and the oxygen collection device is used for collecting generated oxygen.
The control device 2 is configured to obtain a first actual pressure and a first actual liquid level corresponding to a side where the hydrogen production device 1 generates oxygen, and a second actual liquid level corresponding to a side where the hydrogen is generated, and monitor an actual current variation corresponding to the hydrogen production device 1 in real time.
Specifically, the control device 2 may receive the first actual pressure and the first actual liquid level corresponding to the side of the hydrogen production device 1 generating oxygen and the second actual liquid level corresponding to the side generating hydrogen, which are transmitted by the monitoring device, based on the connection between the monitoring devices installed on the hydrogen production device 1, and monitor the actual current variation corresponding to the hydrogen production device 1 in real time.
Wherein, monitoring equipment can include pressure sensor, level sensor and current sensor, and monitoring equipment can also include other monitoring components, and this application embodiment does not specifically limit monitoring equipment.
The control device 2 is further configured to control the hydrogen production device 1 according to the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current variation, so as to ensure the safety of the hydrogen production device 1.
Optionally, after the control device 2 obtains the first actual pressure, the oxygen side adjusting valve corresponding to the hydrogen production device 1 may be adjusted according to the first actual pressure, so that balance between the first actual pressure corresponding to the side where the oxygen is produced by the hydrogen production device 1 and the second actual pressure corresponding to the side where the hydrogen is produced by the hydrogen production device 1 may be ensured, so as to ensure safety of the hydrogen production device 1.
Optionally, after the control device 2 obtains the first actual liquid level corresponding to the side where the hydrogen production device 1 generates oxygen and the second actual liquid level corresponding to the side where the hydrogen production device 1 generates hydrogen, the control device 2 may adjust the oxygen side adjusting valve and the hydrogen side adjusting valve according to the first actual liquid level and the second actual liquid level, so as to ensure that the first actual liquid level corresponding to the side where the hydrogen production device 1 generates oxygen is balanced with the second actual liquid level corresponding to the side where the hydrogen production device 1 generates hydrogen, so as to ensure the safety of the hydrogen production device 1.
Optionally, after obtaining the actual current variation corresponding to the hydrogen production device 1, the control device 2 may adjust the oxygen side adjusting valve and the hydrogen side adjusting valve according to the actual current variation, so as to ensure that a first actual liquid level corresponding to a side where the hydrogen production device 1 generates oxygen is balanced with a second actual liquid level corresponding to a side where the hydrogen production device 1 generates hydrogen, and a first actual pressure corresponding to a side where the oxygen generates is balanced with a second actual pressure corresponding to a side where the hydrogen production device 1 generates hydrogen, so as to ensure safety of the hydrogen production device 1.
The hydrogen production equipment in the hydrogen production system provided by the embodiment of the invention is used for ionizing water to generate hydrogen and oxygen; the control equipment is used for acquiring a first actual pressure and a first actual liquid level corresponding to one side of the hydrogen production equipment for generating oxygen and a second actual liquid level corresponding to one side of the hydrogen production equipment for generating hydrogen, and monitoring the actual current variation corresponding to the hydrogen production equipment in real time; the control device is also used for controlling the hydrogen production device according to the first actual pressure, the first actual liquid level, the second actual liquid level and the actual current variation, so that the pressure balance and the liquid level balance of the side generating oxygen and the side generating hydrogen can be ensured to be maintained at the working time of the hydrogen production system. In addition, because the control equipment is also used for controlling the hydrogen production equipment according to the actual current variation, the phenomenon that the first actual pressure and the first actual liquid level corresponding to the side of the hydrogen production equipment for generating oxygen and the second actual liquid level corresponding to the side of the hydrogen production equipment for generating oxygen are controlled in hysteresis can be avoided, and further the fluctuation of the first actual pressure, the second actual pressure, the first actual liquid level and the second actual liquid level exceeds a safety threshold value, so that the safety risk of the hydrogen production system exceeds the safety threshold value, and the safety risk of the hydrogen production system is caused.
In one embodiment of the present application, as shown in FIG. 2, there is provided a hydrogen production system, hydrogen production apparatus 1 comprising: a hydrogen production plant 1 and a control plant 2,
hydrogen production apparatus 1 for ionizing water to produce hydrogen and oxygen.
In an alternative embodiment of the present application, hydrogen production apparatus 1 comprises:
an electrolytic tank 11, the electrolytic tank 11 being for containing water.
A power supply 12 is connected to the electrolyzer 11 for ionizing water in the electrolyzer 11 to produce hydrogen and oxygen.
The power source 12 may be a dc power source 12.
An oxygen-side gas-liquid separator 13 connected to the electrolytic tank 11 for separating oxygen gas and water generated by ionization.
A hydrogen-side gas-liquid separator 14 connected to the electrolytic tank 11 for separating the hydrogen gas generated by ionization from water.
And the oxygen side regulating valve 15 is used for changing the opening of the valve under the control of the control equipment 2 so as to ensure the safety of the hydrogen production equipment 1.
The hydrogen side regulating valve 16 is used for changing the opening of the valve under the control of the control device 2 so as to ensure the safety of the hydrogen production device 1.
An oxygen side liquid level sensor 17 is in communication with the control device 2 for measuring a first actual liquid level corresponding to the oxygen side gas-liquid separator 13 and transmitting the first actual liquid level to the control device 2.
The hydrogen side liquid level sensor 18 is communicatively connected to the control device 2 and is configured to measure a second actual liquid level corresponding to the hydrogen side gas-liquid separator 14 and transmit the second actual liquid level to the control device 2.
An oxygen side separator pressure transmitter 19 is communicatively connected to the control device 2 for measuring a first actual pressure corresponding to the oxygen side gas-liquid separator 13 and transmitting the first actual pressure to the control device 2.
The hydrogen side separator pressure transmitter 110 is communicatively connected to the control device 2 for measuring a second actual pressure corresponding to the hydrogen side gas-liquid separator 14 and transmitting the second actual pressure to the control device 2.
The current sensor 111 is communicatively connected to the control device 2 for measuring the actual current of the power supply 12 in real time and transmitting the actual current to the control device 2.
The control device 2 is further used for calculating the corresponding actual current variation of the hydrogen production device 1 in real time according to the actual current received in real time.
Specifically, as shown in fig. 2, solid lines in the drawing indicate material flows, broken lines indicate signal flows, and arrows indicate flow directions. The hydrogen production apparatus 1 in this hydrogen production system includes a U-shaped pipe formed of an oxygen-side gas-liquid separator 13 and a hydrogen-side gas-liquid separator 14 and a bottom communicating pipe, and an electrolytic tank 11. The actuators of hydrogen plant 1 are oxygen-side control valve 15 and hydrogen-side control valve 16, wherein oxygen-side control valve 15 and hydrogen-side control valve 16 may be pneumatic membrane control valves. The oxygen-side gas-liquid separator 13 is provided with an oxygen-side liquid level sensor 17 and an oxygen-side separator pressure transmitter 19, and the hydrogen-side gas-liquid separator 14 is provided with a hydrogen-side liquid level sensor 18 and a hydrogen-side separator pressure transmitter 110. The power supply 12 is mounted with a current sensor 111.
The working principle is as follows: the power supply 12 ionizes water in the electrolytic tank 11 to generate oxygen and hydrogen, the generated oxygen and water can enter the oxygen-side gas-liquid separator 13 together, the oxygen-side gas-liquid separator 13 separates the oxygen from the water, the oxygen is output through the oxygen-side regulating valve 15, and the separated water flows back to the electrolytic tank 11 through the U-shaped pipe. Similarly, the generated hydrogen and water can enter the hydrogen-side gas-liquid separator 14 together, the hydrogen-side gas-liquid separator 14 separates the hydrogen from the water, the hydrogen is output through the hydrogen-side regulating valve 16, and the separated water flows back to the electrolytic tank 11 through the U-shaped pipe.
The oxygen-side liquid level sensor 17 measures a first actual liquid level corresponding to the oxygen-side gas-liquid separator 13 in the hydrogen production plant 1, and transmits the first actual liquid level to the control plant 2. Oxygen side separator pressure transmitter 19 measures a first actual pressure corresponding to oxygen side gas-liquid separator 13 in hydrogen plant 1 and transmits the first actual pressure to control plant 2. The hydrogen-side liquid level sensor 18 measures a second actual liquid level corresponding to the hydrogen-side gas-liquid separator 14 in the hydrogen plant, and transmits the second actual liquid level to the control plant 2. The hydrogen-side separator pressure transmitter 110 measures a second actual pressure corresponding to the hydrogen-side gas-liquid separator 14 in the hydrogen production plant 1, and transmits the second actual pressure to the control plant 2.
The current sensor 111 measures the actual current of the power supply 12 in real time and transmits the actual current to the control device 2. The control device 2 calculates the corresponding actual current variation of the hydrogen production device 1 in real time according to the actual current received in real time.
The control device 2 is used for acquiring a first actual pressure and a first actual liquid level corresponding to one side of the hydrogen production device 1 generating oxygen and a second actual liquid level corresponding to one side generating hydrogen, and monitoring the actual current variation corresponding to the hydrogen production device 1 in real time;
the control device 2 is further configured to control the hydrogen production device 1 according to the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current variation, so as to ensure the safety of the hydrogen production device 1.
In an alternative embodiment of the present application, as shown in fig. 3, the control device 2 is configured to obtain a preset current variation threshold corresponding to the hydrogen production device 1; comparing the actual current variation with a preset current variation threshold; when the actual current variation is larger than a preset current variation threshold, calculating a hydrogen production rate variation corresponding to the hydrogen production equipment 1 according to the actual current variation; according to the hydrogen production rate variation, the oxygen side regulating valve 15 and the hydrogen side regulating valve 16 corresponding to the hydrogen production apparatus 1 are regulated.
Specifically, the control device 2 may receive a preset current variation threshold value input by a user, or may receive a preset current variation threshold value sent by another device, or may set the preset current variation threshold value according to the magnitude of the current output by the power supply 12, and the manner in which the control device 2 obtains the preset current variation threshold value in the embodiment of the present application is not specifically limited.
After the control device 2 acquires the preset current variation threshold, the control device 2 may compare the actual current variation with the preset current variation threshold. When the actual current variation is larger than the preset current variation threshold, calculating the hydrogen production rate variation corresponding to the hydrogen production equipment 1 according to the actual current variation.
By way of example, control device 2 may calculate the corresponding hydrogen production rate variation amount of hydrogen production device 1 according to the following formula: when the actual current variation is Δi, the hydrogen production rate variation can be calculated according to darrad's law by the following formula:
Figure BDA0004158735470000151
wherein V is mal For the volume of hydrogen per mole under the working condition, the volume of 1 mole of hydrogen is 22.43 x 10-3m3 under the standard state; f is Faraday constant, 96500C/mol, n is the number of electrons lost or lost from the electrolytically deposited material, and here is 2.
After calculating the hydrogen production rate variation, the control device 2 may adjust the oxygen side adjusting valve 15 and the hydrogen side adjusting valve 16 corresponding to the hydrogen production device 1 according to the hydrogen production rate variation
In an alternative embodiment of the present application, the control device 2 is configured to obtain an actual hydrogen production rate corresponding to the hydrogen production device 1; according to the relation between the hydrogen production rate variation amount and the actual hydrogen production rate, the oxygen-side regulating valve 15 and the hydrogen-side regulating valve 16 corresponding to the hydrogen production apparatus 1 are regulated.
Specifically, after calculating the hydrogen production rate variation amount corresponding to the hydrogen production apparatus 1, the control apparatus 2 may measure the actual hydrogen production rate corresponding to the hydrogen production apparatus 1. Then, according to the relation between the hydrogen production rate variation and the actual hydrogen production rate, the valve openings corresponding to the oxygen side regulating valve 15 and the hydrogen side regulating valve 16 are calculated, and according to the valve openings corresponding to the oxygen side regulating valve 15 and the hydrogen side regulating valve 16, the oxygen side regulating valve 15 and the hydrogen side regulating valve 16 corresponding to the hydrogen production plant 1 are regulated.
By way of example, by calculating the valve opening amounts corresponding to the oxygen-side regulating valve 15 and the hydrogen-side regulating valve 16 from the relationship between the hydrogen production rate variation amount and the actual hydrogen production rate, the following formula can be used:
Figure BDA0004158735470000152
Wherein A is an opening coefficient, Q is a real-time hydrogen production rate,
in an alternative embodiment of the present application, after the control device 2 adjusts the oxygen side adjusting valve 15 and the hydrogen side adjusting valve 16 corresponding to the hydrogen production device 1 according to the hydrogen production rate variation, the control device 2 is further configured to obtain a first set pressure corresponding to the oxygen producing side corresponding to the hydrogen production system; the oxygen side regulating valve 15 is regulated according to the difference between the first actual pressure and the first set pressure.
Specifically, the control device 2 may receive the first set pressure corresponding to the hydrogen side gas-liquid separator 14 corresponding to the hydrogen production system, which is input by the user, or may receive the first set pressure corresponding to the hydrogen side gas-liquid separator 14 corresponding to the hydrogen production system sent by other devices, or may set the first set pressure corresponding to the hydrogen side gas-liquid separator 14 corresponding to the hydrogen production system according to the amount of hydrogen generated by the hydrogen production system.
After the first set pressure corresponding to the hydrogen-side gas-liquid separator 14 of the hydrogen production system is obtained, the control apparatus 2 may calculate a difference between the first actual pressure and the first set pressure, and then adjust the oxygen-side adjusting valve 15 according to the difference between the first actual pressure and the first set pressure by using a preset control method to reduce the difference between the first actual pressure and the first set pressure, so that the first actual pressure approaches the first set pressure to ensure pressure balance on both sides of the hydrogen production apparatus 1.
The preset control method may be feedback control, PID control, or any one of control methods such as slide film control.
In an alternative embodiment of the present application, after the control device 2 adjusts the oxygen side adjusting valve 15 and the hydrogen side adjusting valve 16 corresponding to the hydrogen production device 1 according to the hydrogen production rate variation, the control device 2 is further configured to calculate an actual liquid level difference between the first actual liquid level and the second actual liquid level; acquiring a set liquid level difference corresponding to the actual liquid level difference; the hydrogen side regulating valve 16 is regulated according to the difference between the actual liquid level difference and the set liquid level difference.
Specifically, the control device 2 may calculate an actual liquid level difference between the first actual liquid level and the second actual liquid level. Then, the control device 2 may receive the set liquid level difference corresponding to the actual liquid level difference input by the user, or may receive the set liquid level difference corresponding to the actual liquid level difference sent by other devices, or may set the set liquid level difference corresponding to the actual liquid level difference according to the hydrogen amount generated by the hydrogen production system, where the mode of obtaining the set liquid level difference corresponding to the actual liquid level difference by the control device 2 in the embodiment of the present application is not specifically limited.
After the set liquid level difference corresponding to the actual liquid level difference is acquired, the control apparatus 2 may calculate the difference between the actual liquid level difference and the set liquid level difference. Then, the hydrogen side regulating valve 16 is regulated according to the difference between the actual liquid level difference and the set liquid level difference by using a preset control method to reduce the difference between the actual liquid level difference and the set liquid level difference, so that the actual liquid level difference approaches the set liquid level difference to ensure the liquid level balance at both sides of the hydrogen production equipment 1.
The preset control method may be feedback control, PID control, or any one of control methods such as slide film control.
The hydrogen production system provided by the embodiment of the invention comprises hydrogen production equipment, wherein the hydrogen production equipment comprises: an electrolytic tank 11, the electrolytic tank 11 being for containing water; a power supply 12 connected to the electrolytic tank 11 for ionizing water in the electrolytic tank 11; an oxygen-side gas-liquid separator 13 connected to the electrolytic tank 11 for separating oxygen gas and water generated by ionization; the hydrogen-side gas-liquid separator 14 is connected to the electrolytic tank 11 and separates the hydrogen gas generated by ionization from water, thereby realizing ionization of water to generate oxygen gas and hydrogen gas.
The hydrogen production plant further includes: an oxygen side regulating valve 15 for changing the opening of the valve under the control of the control device 2 to ensure the safety of the hydrogen production device 1; the hydrogen side regulating valve 16 is used for changing the opening of the valve under the control of the control device 2 so as to ensure the safety of the hydrogen production device 1, and the control of the oxygen side regulating valve 15 and the hydrogen side regulating valve 16 is realized so as to ensure the liquid level balance and the pressure balance at the two sides of the hydrogen production device 1, thereby ensuring the safety of a hydrogen production system.
Hydrogen production apparatus 1 further comprises: an oxygen side liquid level sensor 17, which is in communication with the control device 2, for measuring a first actual liquid level and transmitting the first actual liquid level to the control device 2; the accuracy of the first actual liquid level obtained by the control device 2 is ensured. The hydrogen side liquid level sensor 18 is in communication connection with the control device 2 and is used for measuring the second actual liquid level and transmitting the second actual liquid level to the control device 2, so that the accuracy of the second actual liquid level acquired by the control device 2 is ensured. The oxygen side separator pressure transmitter 19 is in communication connection with the control device 2 and is used for measuring the first actual pressure and transmitting the first actual pressure to the control device 2, so that the accuracy of the first actual pressure acquired by the control device 2 is ensured. The hydrogen side separator pressure transmitter 110 is in communication connection with the control device 2, and is configured to measure a second actual pressure corresponding to the side where hydrogen is generated, and transmit the second actual pressure to the control device 2, so as to ensure accuracy of the second actual pressure obtained by the control device 2. The current sensor 111 is in communication connection with the control device 2, and is used for measuring the actual current of the power supply 12 in real time and transmitting the actual current to the control device 2, and the control device 2 is also used for calculating the actual current variation corresponding to the hydrogen production device 1 in real time according to the actual current received in real time, so that the accuracy of the calculated actual current variation is ensured. The control device 2 can ensure the accuracy of controlling the hydrogen production device 1 according to the first actual pressure, the first actual liquid level, the second actual liquid level and the actual current variation. Therefore, the phenomenon that the first actual pressure and the first actual liquid level corresponding to the side of the hydrogen production equipment 1 which generates oxygen and the second actual liquid level and the second actual pressure which correspond to the side of the hydrogen production equipment are delayed in control can be avoided, and further the fluctuation of the first actual pressure, the second actual pressure, the first actual liquid level and the second actual liquid level exceeds a safety threshold value, so that the safety risk of the hydrogen production system exceeds the safety threshold value, and the safety risk of the hydrogen production system is caused.
The hydrogen production system provided by the embodiment of the invention obtains the preset current variation threshold corresponding to the hydrogen production equipment 1; the actual current variation is compared with a preset current variation threshold, so that the accuracy of the obtained comparison result is ensured. When the actual current variation is larger than the preset current variation threshold, calculating the hydrogen production rate variation corresponding to the hydrogen production equipment 1 according to the actual current variation, and ensuring the accuracy of the calculated hydrogen production rate variation corresponding to the hydrogen production equipment 1. Then, obtaining the actual hydrogen production rate corresponding to the hydrogen production equipment 1; according to the relation between the hydrogen production rate variation and the actual hydrogen production rate, the oxygen side regulating valve 15 and the hydrogen side regulating valve 16 corresponding to the hydrogen production equipment 1 are regulated, and the accuracy of regulating the oxygen side regulating valve 15 and the hydrogen side regulating valve 16 corresponding to the hydrogen production equipment 1 is ensured. Thereby, the phenomenon that the actual current variation of the hydrogen production equipment 1 is overlarge, so that the hydrogen production amount possibly changes drastically at any time, the first actual pressure and the first actual liquid level corresponding to the side generating oxygen corresponding to the hydrogen production equipment 1 and the second actual liquid level and the second actual pressure corresponding to the side generating hydrogen are delayed in control is avoided, and further the first actual pressure, the second actual pressure, the first actual liquid level and the second actual liquid level fluctuation exceed the safety threshold, so that the safety risk of the hydrogen production system exceeds the safety threshold, and the safety risk of the hydrogen production system is caused.
In addition, when the actual current variation is greater than the preset current variation threshold, the control device 2 obtains a first set pressure corresponding to the side of the hydrogen production system, which generates oxygen; according to the difference between the first actual pressure and the first set pressure, the oxygen side regulating valve 15 is regulated, and the accuracy of regulating the oxygen side regulating valve 15 is ensured. So that pressure balance on both sides of the hydrogen production apparatus 1 can be ensured.
In addition, when the actual current variation is greater than the preset current variation threshold, the control device 2 calculates an actual liquid level difference between the first actual liquid level and the second actual liquid level, thereby ensuring the accuracy of the calculated actual liquid level difference. Acquiring a set liquid level difference corresponding to the actual liquid level difference; according to the difference between the actual liquid level difference and the set liquid level difference, the hydrogen side regulating valve 16 is regulated, so that the accuracy of regulating the hydrogen side regulating valve 16 is ensured, and the liquid level balance at two sides of the hydrogen production equipment 1 can be further realized.
In an optional embodiment of the present application, a preset current variation threshold corresponding to the hydrogen production device 1 is obtained; comparing the actual current variation with a preset current variation threshold; when the actual current variation is smaller than or equal to a preset current variation threshold, acquiring a first set pressure corresponding to one side of the hydrogen production system, which generates oxygen; according to the difference between the first actual pressure and the first set pressure, the oxygen side regulating valve 15 corresponding to the hydrogen production equipment 1 is regulated; calculating an actual liquid level difference between the first actual liquid level and the second actual liquid level; acquiring a set liquid level difference corresponding to the actual liquid level difference; the hydrogen side regulating valve 16 corresponding to the hydrogen production apparatus 1 is regulated according to the difference between the actual liquid level difference and the set liquid level difference.
Specifically, the control device 2 may receive a preset current variation threshold value input by a user, or may receive a preset current variation threshold value sent by another device, or may set the preset current variation threshold value according to the magnitude of the current output by the power supply 12, and the manner in which the control device 2 obtains the preset current variation threshold value in the embodiment of the present application is not specifically limited.
After the control device 2 acquires the preset current variation threshold, the control device 2 may compare the actual current variation with the preset current variation threshold. When the actual current variation is less than or equal to the preset current variation threshold, the control device 2 may receive the first set pressure corresponding to the hydrogen side gas-liquid separator 14 corresponding to the hydrogen production system, which is input by the user, or may also receive the first set pressure corresponding to the hydrogen side gas-liquid separator 14 corresponding to the hydrogen production system sent by other devices, or may set the first set pressure corresponding to the hydrogen side gas-liquid separator 14 corresponding to the hydrogen production system according to the amount of hydrogen produced by the hydrogen production system.
After the first set pressure corresponding to the hydrogen-side gas-liquid separator 14 of the hydrogen production system is obtained, the control apparatus 2 may calculate a difference between the first actual pressure and the first set pressure, and then adjust the oxygen-side adjusting valve 15 according to the difference between the first actual pressure and the first set pressure by using a preset control method to reduce the difference between the first actual pressure and the first set pressure, so that the first actual pressure approaches the first set pressure to ensure pressure balance on both sides of the hydrogen production apparatus 1.
The preset control method may be feedback control, PID control, or any one of control methods such as slide film control.
Furthermore, the control device 2 may calculate an actual level difference between the first actual level and the second actual level. Then, the control device 2 may receive the set liquid level difference corresponding to the actual liquid level difference input by the user, or may receive the set liquid level difference corresponding to the actual liquid level difference sent by other devices, or may set the set liquid level difference corresponding to the actual liquid level difference according to the hydrogen amount generated by the hydrogen production system, where the mode of obtaining the set liquid level difference corresponding to the actual liquid level difference by the control device 2 in the embodiment of the present application is not specifically limited.
After the set liquid level difference corresponding to the actual liquid level difference is acquired, the control apparatus 2 may calculate the difference between the actual liquid level difference and the set liquid level difference. Then, the hydrogen side regulating valve 16 is regulated according to the difference between the actual liquid level difference and the set liquid level difference by using a preset control method to reduce the difference between the actual liquid level difference and the set liquid level difference, so that the actual liquid level difference approaches the set liquid level difference to ensure the liquid level balance at both sides of the hydrogen production equipment 1.
The preset control method may be feedback control, PID control, or any one of control methods such as slide film control.
The hydrogen production system provided by the embodiment of the invention compares the actual current variation with a preset current variation threshold; the accuracy of the obtained comparison result is ensured. When the actual current variation is smaller than or equal to a preset current variation threshold, acquiring a first set pressure corresponding to one side of the hydrogen production system, which generates oxygen; according to the difference between the first actual pressure and the first set pressure, the oxygen side regulating valve 15 corresponding to the hydrogen production equipment 1 is regulated, and the accuracy of regulating the oxygen side regulating valve 15 is ensured. So that pressure balance on both sides of the hydrogen production apparatus 1 can be ensured.
The actual liquid level difference between the first actual liquid level and the second actual liquid level is calculated, and the accuracy of the calculated actual liquid level difference is ensured. Acquiring a set liquid level difference corresponding to the actual liquid level difference; according to the difference between the actual liquid level difference and the set liquid level difference, the hydrogen side regulating valve 16 is regulated, so that the accuracy of regulating the hydrogen side regulating valve 16 is ensured, and the liquid level balance at two sides of the hydrogen production equipment 1 can be further realized.
To better illustrate the hydrogen production system provided by the embodiments of the present application, the embodiments of the present application provide an overall flow of a control method of the hydrogen production system, as shown in fig. 4, applied to a control apparatus in the hydrogen production system of any one of the foregoing embodiments, the method includes:
s11, acquiring a first actual pressure and a first actual liquid level corresponding to one side of the hydrogen production equipment producing oxygen in the hydrogen production system and a second actual liquid level corresponding to one side producing hydrogen, and monitoring an actual current change amount corresponding to the hydrogen production equipment in real time.
S12, controlling the hydrogen production equipment according to the first actual pressure, the first actual liquid level, the second actual liquid level and the actual current variation so as to ensure the safety of the hydrogen production equipment.
For an explanation of the control method of the hydrogen production system, please refer to the explanation of the hydrogen production system in the above embodiment, and the description is omitted here.
According to the control method of the hydrogen production system, provided by the embodiment of the invention, the first actual pressure and the first actual liquid level corresponding to one side of the hydrogen production equipment for producing oxygen in the hydrogen production system and the second actual liquid level corresponding to one side of the hydrogen production equipment are obtained, and the actual current variation corresponding to the hydrogen production equipment is monitored in real time; and controlling the hydrogen production equipment according to the first actual pressure, the first actual liquid level, the second actual liquid level and the actual current variation so as to ensure the safety of the hydrogen production equipment. Thereby ensuring that the pressure balance and the liquid level balance of the side generating oxygen and the side generating hydrogen can be maintained at the working time of the hydrogen production system. In addition, because the control equipment is also used for controlling the hydrogen production equipment according to the actual current variation, the phenomenon that the first actual pressure and the first actual liquid level corresponding to the side of the hydrogen production equipment for generating oxygen and the second actual liquid level corresponding to the side of the hydrogen production equipment for generating oxygen are controlled in hysteresis can be avoided, and further the fluctuation of the first actual pressure, the second actual pressure, the first actual liquid level and the second actual liquid level exceeds a safety threshold value, so that the safety risk of the hydrogen production system exceeds the safety threshold value, and the safety risk of the hydrogen production system is caused.
It should be understood that, although the steps in the flowchart of fig. 4 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least a portion of the steps in fig. 4 may include a plurality of steps or stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily sequential, but may be performed in rotation or alternatively with at least a portion of the steps or stages in other steps or other steps.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.

Claims (10)

1. A hydrogen production system, the hydrogen production system comprising: hydrogen production apparatus and control apparatus, wherein:
The hydrogen production equipment is used for ionizing water to generate hydrogen and oxygen;
the control equipment is used for acquiring a first actual pressure and a first actual liquid level corresponding to one side of the hydrogen production equipment, which generates oxygen, and a second actual liquid level corresponding to one side of the hydrogen production equipment, and monitoring the actual current variation corresponding to the hydrogen production equipment in real time;
the control device is further used for controlling the hydrogen production device according to the first actual pressure, the first actual liquid level, the second actual liquid level and the actual current variation, so that the safety of the hydrogen production device is ensured.
2. The hydrogen production system of claim 1, wherein the control device is configured to obtain a preset current variation threshold corresponding to the hydrogen production device;
comparing the actual current variation with the preset current variation threshold;
when the actual current variation is larger than the preset current variation threshold, calculating hydrogen production rate variation corresponding to the hydrogen production equipment according to the actual current variation;
and adjusting an oxygen side adjusting valve and a hydrogen side adjusting valve corresponding to the hydrogen production equipment according to the hydrogen production rate variation.
3. The hydrogen production system of claim 2, wherein the control device is configured to obtain an actual hydrogen production rate corresponding to the hydrogen production device;
and adjusting an oxygen side adjusting valve and a hydrogen side adjusting valve corresponding to the hydrogen production equipment according to the relation between the hydrogen production rate variation and the actual hydrogen production rate.
4. The hydrogen production system of claim 2, wherein the control device is further configured to obtain a first set pressure corresponding to a side of the hydrogen production system that generates oxygen; and adjusting the oxygen side adjusting valve according to the difference between the first actual pressure and the first set pressure.
5. The hydrogen production system of claim 2, wherein the control device is further configured to calculate an actual liquid level difference between the first actual liquid level and the second actual liquid level;
acquiring a set liquid level difference corresponding to the actual liquid level difference;
and adjusting the hydrogen side adjusting valve according to the difference between the actual liquid level difference and the set liquid level difference.
6. The hydrogen production system of claim 1, wherein the control device is configured to obtain a preset current variation threshold corresponding to the hydrogen production device;
Comparing the actual current variation with the preset current variation threshold;
when the actual current variation is smaller than or equal to the preset current variation threshold, acquiring a first set pressure corresponding to one side of the hydrogen production system, which generates oxygen; according to the difference between the first actual pressure and the first set pressure, adjusting an oxygen side adjusting valve corresponding to the hydrogen production equipment;
calculating an actual liquid level difference between the first actual liquid level and the second actual liquid level;
acquiring a set liquid level difference corresponding to the actual liquid level difference;
and adjusting a hydrogen side adjusting valve corresponding to the hydrogen production equipment according to the difference between the actual liquid level difference and the set liquid level difference.
7. The hydrogen production system of claim 1, wherein the hydrogen production apparatus comprises:
an electrolytic cell for containing water;
the power supply is connected with the electrolytic tank and is used for ionizing water in the electrolytic tank to generate hydrogen and oxygen;
the oxygen side gas-liquid separator is connected with the electrolytic tank and is used for separating oxygen and water generated by ionization;
and the hydrogen side gas-liquid separator is connected with the electrolytic tank and is used for separating hydrogen generated by ionization from water.
8. The hydrogen production system of claim 7, wherein the hydrogen production apparatus further comprises:
the oxygen side regulating valve is used for changing the opening of the valve under the control of the control equipment so as to ensure the safety of the hydrogen production equipment;
and the hydrogen side regulating valve is used for changing the opening of the valve under the control of the control equipment so as to ensure the safety of the hydrogen production equipment.
9. The hydrogen production system of claim 8, wherein the hydrogen production apparatus further comprises:
the oxygen side liquid level sensor is in communication connection with the control equipment and is used for measuring the first actual liquid level corresponding to the oxygen side gas-liquid separator and transmitting the first actual liquid level to the control equipment;
the hydrogen side liquid level sensor is in communication connection with the control equipment and is used for measuring the second actual liquid level corresponding to the hydrogen side gas-liquid separator and transmitting the second actual liquid level to the control equipment;
an oxygen side separator pressure transmitter in communication with the control device for measuring the first actual pressure corresponding to the oxygen side gas-liquid separator and transmitting the first actual pressure to the control device;
The hydrogen side separator pressure transmitter is in communication connection with the control device and is used for measuring the second actual pressure corresponding to the hydrogen side gas-liquid separator and transmitting the second actual pressure to the control device;
the current sensor is in communication connection with the control equipment and is used for measuring the actual current of the power supply in real time and transmitting the actual current to the control equipment;
the control equipment is also used for calculating the actual current variation corresponding to the hydrogen production equipment in real time according to the actual current received in real time.
10. A method of controlling a hydrogen production system, characterized by being applied to a control apparatus in a hydrogen production system as claimed in any one of claims 1 to 9, the method comprising:
acquiring a first actual pressure and a first actual liquid level corresponding to one side of hydrogen production equipment for producing oxygen in the hydrogen production system and a second actual liquid level corresponding to one side of hydrogen production equipment, and monitoring the actual current variation corresponding to the hydrogen production equipment in real time;
and controlling the hydrogen production equipment according to the first actual pressure, the first actual liquid level, the second actual liquid level and the actual current variation so as to ensure the safety of the hydrogen production equipment.
CN202310343346.0A 2023-03-31 2023-03-31 Hydrogen production system and hydrogen production system control method Pending CN116356346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310343346.0A CN116356346A (en) 2023-03-31 2023-03-31 Hydrogen production system and hydrogen production system control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310343346.0A CN116356346A (en) 2023-03-31 2023-03-31 Hydrogen production system and hydrogen production system control method

Publications (1)

Publication Number Publication Date
CN116356346A true CN116356346A (en) 2023-06-30

Family

ID=86941635

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310343346.0A Pending CN116356346A (en) 2023-03-31 2023-03-31 Hydrogen production system and hydrogen production system control method

Country Status (1)

Country Link
CN (1) CN116356346A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118166398A (en) * 2024-03-07 2024-06-11 北京金博智慧健康科技有限公司 Hydrogen preparation method, preparation system and computer storage medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118166398A (en) * 2024-03-07 2024-06-11 北京金博智慧健康科技有限公司 Hydrogen preparation method, preparation system and computer storage medium

Similar Documents

Publication Publication Date Title
CN114134527B (en) Water electrolysis hydrogen production device and method with multiple electrolytic tanks
US8419910B2 (en) Electrolyzer cell stack system
JPWO2020022190A1 (en) Gas production equipment and gas production method
US11060198B2 (en) Water electrolysis system and method of operating water electrolysis system
CN116356346A (en) Hydrogen production system and hydrogen production system control method
WO2022157394A2 (en) Water electrolysis hydrogen production device and hydrogen production method
MXPA01011483A (en) Hydrogen fuel replenishment process and system.
EP3017089B1 (en) Hydrogen system and method of operation
WO2001016399A1 (en) Pressure differential control in an electrolytic cell
JPWO2020095664A1 (en) Hydrogen production method
EP0203900A2 (en) Chlorinating apparatus
CN219079663U (en) Multi-station PEM (PEM) water electrolysis hydrogen production test system
JP2021085081A (en) Water electrolysis system
CN114790551A (en) Liquid level balance control system and method for water electrolysis hydrogen production equipment
CN114381755A (en) Standby control method, control system and hydrogen production device
CN115233249A (en) Electrolysis device and method for alkaline electrolysis
CN117867591A (en) Water electrolysis hydrogen production system and pressure control method
CN117107298A (en) Electrolysis cell pressure control system, electrolysis cell pressure control method and computer equipment
US20030094378A1 (en) Electrochemical cell pressure regulating system and methods of using the same
JP7027441B2 (en) Methods for detecting leaks in energy converter systems
CN1107743C (en) Water-electrolyzing hydrogen generator
US6723220B2 (en) Protonic rate level sensing device for an electrolysis cell
KR102625513B1 (en) Separate type bop applied water electrolysis device
EP4071276A1 (en) Electrolysis arrangement for alkaline electrolysis
CN115976572B (en) Method, system, device and storage medium for controlling gas purity of electrolytic cell

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination