CN111850591B - Combined diaphragm regulating valve device, alkaline water electrolysis hydrogen production system and control method - Google Patents
Combined diaphragm regulating valve device, alkaline water electrolysis hydrogen production system and control method Download PDFInfo
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- CN111850591B CN111850591B CN202010560970.2A CN202010560970A CN111850591B CN 111850591 B CN111850591 B CN 111850591B CN 202010560970 A CN202010560970 A CN 202010560970A CN 111850591 B CN111850591 B CN 111850591B
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- 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
- C25B13/00—Diaphragms; Spacing elements
- C25B13/02—Diaphragms; Spacing elements characterised by shape or form
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- 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
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- 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
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- 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
Abstract
The invention relates to a combined diaphragm regulating valve device, an alkaline water electrolysis hydrogen production system and a control method. The combined diaphragm regulating valve device comprises a plurality of diaphragm regulating valve branches with different gas flow ranges and flow distributors for distributing the flow of each branch, wherein the diaphragm regulating valve branches are arranged in parallel, and the flow distributors are respectively connected with the diaphragm regulating valve branches, and in the working process, at least 1 diaphragm regulating valve branch works. The alkaline water electrolysis hydrogen production system comprises an alkaline water electrolysis hydrogen production device, an alkaline solution circulation device and 2 combined diaphragm regulating valve devices, wherein the alkaline water electrolysis hydrogen production device comprises an electrolytic tank, an oxygen side gas-liquid separator and a hydrogen side gas-liquid separator, the alkaline solution circulation device is connected with the alkaline water electrolysis hydrogen production device, and the combined diaphragm regulating valve devices are respectively arranged at the gas output ends of the oxygen side gas-liquid separator and the hydrogen side gas-liquid separator. Compared with the prior art, the invention ensures the safety of the alkaline water electrolysis hydrogen production system in different working power ranges.
Description
Technical Field
The invention relates to the technical field of hydrogen production by alkaline water electrolysis, in particular to a combined diaphragm regulating valve device, an alkaline water electrolysis hydrogen production system and a control method.
Background
Hydrogen energy is considered as one of the important strategic directions of world energy and power transformation, and is concerned by various countries in the world, and the most mature technical route in the process of producing hydrogen by water electrolysis is currently an alkaline water electrolysis technology.
Chinese patent CN 110106512A: the device for producing hydrogen by electrolyzing water comprises j parallel branches, and k hydrogen producing units connected in series are arranged on each parallel branch, so that the hydrogen producing device can be conveniently adjusted to different powers, and the device is more in adjusting gear and well suitable for fluctuation and change of input power when new energy sources (such as wind power, photovoltaic and the like) with intermittent properties are used for generating electricity as hydrogen producing power sources.
Chinese patent CN203582560U: the utility model provides an electrolytic tank exhaust apparatus of electrolysis water system provides an electrolytic tank exhaust apparatus that surface gas formed the gas plug in acid water solenoid valve and alkaline water solenoid valve, can improve both ends play water uneven, has improved the problem such as sour gas corrosion equipment, has certain value.
In the prior related researches, although a plurality of electrolytic water hydrogen production units are used in the same system to meet the power fluctuation, and the design of an electrolytic tank exhaust device is also carried out, the problem that the gas diaphragm valve of a gas-liquid separation module is difficult to accurately regulate the pressure caused by different gas flow when alkaline electrolytic water hydrogen production equipment works under different powers is not considered, and the design of a combined regulating system for the diaphragm valve is not carried out.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a combined diaphragm regulating valve device, an alkaline water electrolysis hydrogen production system and a control method.
The aim of the invention can be achieved by the following technical scheme:
the device comprises a plurality of diaphragm regulating valve branches with different gas flow ranges and flow distributors for flow distribution of each branch, wherein the diaphragm regulating valve branches are arranged in parallel, and the flow distributors are respectively connected with the diaphragm regulating valve branches, and at least 1 diaphragm regulating valve branch works in the working process.
The diaphragm regulating valve branch circuits comprise diaphragm regulating valves and flow meters which are sequentially connected in series, and the diaphragm regulating valves and the flow meters of the diaphragm regulating valve branch circuits are connected to the flow distributor to form a closed-loop accurate regulating circuit.
The flow ranges of the diaphragm regulating valves in the diaphragm regulating valve branches arranged in parallel are configured to change in a gradient manner.
The flow range of the diaphragm regulating valve is specifically configured as follows:
Q g1_max ＞Q g2_max ＞…＞Q gn_max ，
Q g1_min ＞Q g2_min ＞…＞Q gn_min ，
wherein Q is g1_max Maximum gas flow of diaphragm regulating valve in 1 st diaphragm regulating valve branch, Q g2_max Maximum gas flow of diaphragm regulating valve in 2 nd diaphragm regulating valve branch, Q gn_max Maximum gas flow of diaphragm regulating valve in nth diaphragm regulating valve branch, Q g1_min Minimum gas flow for diaphragm regulating valve in 1 st diaphragm regulating valve branch, Q g2_min Minimum gas flow for diaphragm regulating valve in 2 nd diaphragm regulating valve branch, Q gn_min The minimum gas flow of the diaphragm regulating valve in the nth diaphragm regulating valve branch is obtained, and n is the total number of diaphragm regulating valve branches.
The flow distributor is configured to select a microprocessor chip which corresponds to the operation of the diaphragm regulating valve branch according to the gas flow demand.
The alkaline electrolyzed water hydrogen production system comprises an alkaline electrolyzed water hydrogen production device and an alkaline solution circulating device, wherein the alkaline electrolyzed water hydrogen production device comprises an electrolytic tank, an oxygen side gas-liquid separator and a hydrogen side gas-liquid separator, the alkaline solution circulating device is connected with the alkaline electrolyzed water hydrogen production device, the system also comprises 2 combined diaphragm regulating valve devices, and the combined diaphragm regulating valve devices are respectively arranged at the gas output ends of the oxygen side gas-liquid separator and the hydrogen side gas-liquid separator.
The alkali liquor circulating device comprises an alkali liquor replenishing pump, an alkali liquor filter, an alkali liquor circulating pump, an alkali liquor tank, an alkali liquor circulating heat exchanger, a cooling water tank and a cooling water pump, wherein the input end of the alkali liquor filter is connected to the alkali liquor output ends of the oxygen side gas-liquid separator and the hydrogen side gas-liquid separator, the output end of the alkali liquor filter is connected to the alkali liquor input end of the electrolytic tank sequentially through the alkali liquor circulating pump and the alkali liquor circulating heat exchanger, the alkali liquor circulating heat exchanger is connected with the cooling water tank through the cooling water pump to form a heat exchange loop, and the input end of the alkali liquor filter is connected with the alkali liquor tank through the replenishing pump to replenish alkali liquor.
A method of controlling an alkaline water electrolysis hydrogen production system for controlling a combined diaphragm regulating valve device in the alkaline water electrolysis hydrogen production system, the method comprising the steps of:
(1) The flow distributor obtains the gas flow generated by the alkaline electrolyzed water hydrogen production system;
(2) Judging whether any diaphragm regulating valve branch in the combined diaphragm regulating valve device has gas flow data, if so, executing the step (3), and if not, starting the diaphragm regulating valve branch with the highest gas flow range;
(3) Judging whether the gas flow generated by the alkaline water electrolysis hydrogen production system is in a regulating section of the currently-started diaphragm regulating valve branch circuit capable of accurately regulating and controlling the pressure, if so, keeping the current diaphragm regulating valve branch circuit to operate, otherwise, selecting the corresponding diaphragm regulating valve branch circuit to operate according to the gas flow generated by the alkaline water electrolysis hydrogen production system and the flow range of the current diaphragm regulating valve branch circuit.
The step (3) is specifically as follows:
(31) Calculating whether the gas flow generated by the alkaline water electrolysis hydrogen production system is in an edge + -phi interval of the gas flow range of the current diaphragm regulating valve branch, if so, executing the step (32), otherwise, keeping the current diaphragm regulating valve branch running;
(32) Judging whether the change rate of the gas flow generated by the alkaline water electrolysis hydrogen production system is more than or equal to +/-delta, if so, then: when the gas flow rate generated by the alkaline water electrolysis hydrogen production system is higher than-phi of the upper limit of the gas flow rate of the current diaphragm regulating valve branch and the gas flow rate change rate is greater than or equal to +delta, a diaphragm regulating valve branch with a higher gas flow rate range is started, and when the gas flow rate generated by the alkaline water electrolysis hydrogen production system is lower than +phi of the lower limit of the gas flow rate of the current diaphragm regulating valve branch and the gas flow rate change rate is less than or equal to-delta, a diaphragm regulating valve branch with a lower gas flow rate range is started; otherwise, the current diaphragm regulating valve branch is kept to operate.
Compared with the prior art, the invention has the following advantages:
(1) The combined diaphragm regulating valve device is used for discharging gas when alkaline water electrolysis hydrogen production is performed, can ensure accurate control of oxygen and hydrogen pressure at each hydrogen production rate, can greatly widen the working power range of an alkaline water electrolysis hydrogen production system, and increases the wide power fluctuation adaptability of alkaline water electrolysis hydrogen production equipment.
(2) The combined diaphragm regulating valves are respectively arranged at the hydrogen outlet and the oxygen outlet of the alkaline water electrolysis hydrogen production system, so that the accurate control of the hydrogen pressure and the oxygen pressure at each hydrogen production rate can be ensured, the hydrogen side pressure difference and the oxygen side pressure difference at different flow rates can be kept in a set range, the mutual channeling of the hydrogen and the oxygen in the alkaline water electrolysis hydrogen production equipment is effectively prevented, and the safety of the alkaline water electrolysis hydrogen production equipment at different working powers is enhanced.
(3) According to the control method, the flow and the flow change rate are considered at the same time, and each diaphragm regulating valve is reasonably started according to different working conditions, so that the pressure can be accurately controlled under the condition of rapid change of different gas flows and powers, and the safety of the alkaline water electrolysis hydrogen production equipment under different working powers is enhanced.
Drawings
FIG. 1 is a block diagram of an alkaline water electrolysis hydrogen production system employing a combined diaphragm regulator valve arrangement of the present invention;
FIG. 2 is a functional block diagram of a combined diaphragm regulating valve device in an alkaline water electrolysis hydrogen production system according to the present invention;
FIG. 3 is a flow chart of a control method of the alkaline water electrolysis hydrogen production system of the invention;
FIG. 4 is a schematic diagram of the hydrogen production flow rate of an alkaline water electrolysis hydrogen production system in an embodiment of the invention;
FIG. 5 is a schematic diagram of the process of adjusting the hydrogen side combined diaphragm adjusting valve device of the alkaline water electrolysis hydrogen production system according to the embodiment of the invention.
In the figure, 1 is an electrolytic tank, 2 is a rectifier transformer, 3 is an alkali liquor circulating heat exchanger, 4 is a cooling water tank, 5 is a cooling water pump, 6 is a hydrogen side combined diaphragm regulating valve device, 7 is a hydrogen side gas-liquid separator, 8 is hydrogen purification equipment, 9 is an oxygen side combined diaphragm regulating valve device, 10 is an oxygen collecting or aftertreatment device, 11 is an oxygen side gas-liquid separator, 12 is an alkali liquor replenishing pump, 13 is an alkali liquor filter, 14 is an alkali liquor circulating pump, and 15 is an alkali liquor tank.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. Note that the following description of the embodiments is merely an example, and the present invention is not intended to be limited to the applications and uses thereof, and is not intended to be limited to the following embodiments.
Examples
As shown in fig. 1 and 2, a combined diaphragm regulating valve device is used for discharging gas during hydrogen production by alkaline electrolysis of water, the device comprises a plurality of diaphragm regulating valve branches with different gas flow ranges and flow distributors for flow distribution of each branch, the diaphragm regulating valve branches are arranged in parallel, the flow distributors are respectively connected with the diaphragm regulating valve branches, and in the working process, at least 1 diaphragm regulating valve branch works.
The diaphragm regulating valve branch circuits comprise diaphragm regulating valves and flow meters which are sequentially connected in series, and the diaphragm regulating valves and the flow meters of the diaphragm regulating valve branch circuits are connected to the flow distributor to form a closed-loop precise regulating circuit.
The flow ranges of the diaphragm regulating valves in the diaphragm regulating valve branches arranged in parallel are configured to change in a gradient manner.
The flow range of the diaphragm regulating valve is specifically configured as follows:
Q g1_max ＞Q g2_max ＞…＞Q gn_max ，
Q g1_min ＞Q g2_min ＞…＞Q gn_min ，
wherein Q is g1_max Maximum gas flow of diaphragm regulating valve in 1 st diaphragm regulating valve branch, Q g2_max Maximum gas flow of diaphragm regulating valve in 2 nd diaphragm regulating valve branch, Q gn_max Maximum gas flow of diaphragm regulating valve in nth diaphragm regulating valve branch, Q g1_min Minimum gas flow for diaphragm regulating valve in 1 st diaphragm regulating valve branch, Q g2_min Minimum gas flow for diaphragm regulating valve in 2 nd diaphragm regulating valve branch, Q gn_min The minimum gas flow of the diaphragm regulating valve in the nth diaphragm regulating valve branch is obtained, and n is the total number of diaphragm regulating valve branches.
The flow distributor is configured to select a microprocessor chip that operates in response to the diaphragm regulator valve branch according to the gas flow demand.
The alkaline electrolyzed water hydrogen production system comprises an alkaline electrolyzed water hydrogen production device and an alkaline solution circulating device, wherein the alkaline electrolyzed water hydrogen production device comprises an electrolytic tank 1, an oxygen side gas-liquid separator 11 and a hydrogen side gas-liquid separator 7, the alkaline solution circulating device is connected with the alkaline electrolyzed water hydrogen production device, the alkaline electrolyzed water hydrogen production system further comprises 2 combined diaphragm regulating valve devices, namely a hydrogen side combined diaphragm regulating valve device 6 and an oxygen side combined diaphragm regulating valve device 9, and the hydrogen side combined diaphragm regulating valve device 6 and the oxygen side combined diaphragm regulating valve device 9 are respectively and correspondingly arranged at gas output ends of the hydrogen side gas-liquid separator 7 and the oxygen side gas-liquid separator 11.
When the electrolytic water hydrogen production system works, alternating current power supply is changed into direct current power through the rectifier transformer 2 to enter the electrolytic tank 1, the electrolytic tank 1 is the core of the system, water in alkaline liquor is electrolyzed into hydrogen and oxygen which are separated out on the surface of an electrode, and the volume ratio of the hydrogen to the oxygen is approximately 2: and 1, entering a hydrogen and oxygen gas outlet pipe and entering a gas-liquid separator. In the gas-liquid separator, the mixture of hydrogen, oxygen and alkali liquor flowing out of the electrolytic tank 1 flows into the hydrogen side gas-liquid separator 7 and the oxygen side gas-liquid separator 11 respectively, after being washed and cooled by the hydrogen washing cooler in the morning, the hydrogen and the oxygen are separated from each other gradually and overflows from the alkali liquor under the action of gravity, the hydrogen is discharged through the hydrogen side combined diaphragm regulating valve device 6 and the oxygen side combined diaphragm regulating valve device 9 respectively, the hydrogen is pressurized or stored after passing through the hydrogen purifying device 8, and the oxygen enters the oxygen collecting or post-processing device 10.
The alkali liquor circulating device comprises an alkali liquor replenishing pump 12, an alkali liquor filter 13, an alkali liquor circulating pump 14, an alkali liquor tank 15, an alkali liquor circulating heat exchanger 3, a cooling water tank 4 and a cooling water pump 5, wherein the input end of the alkali liquor filter 13 is connected to the alkali liquor output ends of the hydrogen side gas-liquid separator 7 and the oxygen side gas-liquid separator 11, the output end of the alkali liquor filter 13 is sequentially connected to the electrolytic tank 1 through the alkali liquor circulating pump 14 and the alkali liquor circulating heat exchanger 3, the alkali liquor circulating heat exchanger 3 is further connected with the cooling water tank 4 through the cooling water pump 5 to form a heat exchange loop, and the input end of the alkali liquor filter 13 is further connected with the alkali liquor tank 15 through the replenishing pump 12 for alkali liquor replenishing. The alkali liquor circulation system pumps the alkali liquor discharged from the gas-liquid separator into the alkali liquor circulation heat exchanger 3 by the alkali liquor circulation pump 14 after solid impurities are removed by the alkali liquor filter 13, and the alkali liquor enters the electrolytic tank 1 after heat exchange to form an alkali liquor closed-loop system. Meanwhile, as the water is continuously consumed in the hydrogen production by the electrolysis of water, the prepared electrolyte needs to be added into the alkali liquor circulation through the alkali liquor replenishing pump 12 from the alkali liquor tank 15. The electrolytic water hydrogen production system has higher energy consumption and needs to be cooled and radiated during normal operation. In the cooling module, the cooling deionized water stored in the cooling water tank 4 enters the electrolytic tank 1 through the cooling water pump 5, the temperature of the hydrogen production module is kept in a working range, after the hydrogen production module by the electrolytic water flows out, the cooling water is cooled through the alkali liquor circulating heat exchanger 3, and enters the cooling water tank 4.
In this embodiment, the hydrogen side combined diaphragm regulating valve device 6 is provided with n diaphragm regulating valve branches, and the oxygen side combined diaphragm regulating valve device 9 is provided with m diaphragm regulating valve branches, so that the flow range of the diaphragm regulating valve of the hydrogen side combined diaphragm regulating valve device 6 is specifically configured as follows:
Q H1_max ＞Q H2_max ＞…＞Q Hn_max ，
Q H1_min ＞Q H2_min ＞…＞Q Hn_min ，
wherein Q is H1_max Combined diaphragm regulation for hydrogen sideMaximum gas flow of diaphragm regulating valve in 1 st diaphragm regulating valve branch in valve device 6, and so on, Q Hn_max For the maximum gas flow rate of the diaphragm regulating valve in the nth diaphragm regulating valve branch in the hydrogen side combined diaphragm regulating valve device 6, Q H1_min Minimum gas flow for diaphragm regulator valve in 1 st diaphragm regulator valve branch in hydrogen side combined diaphragm regulator valve device 6, and so on, Q Hn_min The minimum gas flow for the diaphragm regulator valve in the nth diaphragm regulator valve branch.
The flow range of the diaphragm regulating valve of the oxygen side combined diaphragm regulating valve device 9 is specifically configured as follows:
Q O1_max ＞Q O2_max ＞…＞Q On_max ，
Q O1_min ＞Q O2_min ＞…＞Q On_min ，
wherein Q is O1_max For maximum gas flow of the diaphragm regulating valve in the 1 st diaphragm regulating valve branch in the oxygen side combined diaphragm regulating valve device 9, and so on, Q Om_max For maximum gas flow rate, Q, of diaphragm regulating valve in mth diaphragm regulating valve branch in oxygen side combined diaphragm regulating valve device 9 O1_min Minimum gas flow for diaphragm regulator valve in 1 st diaphragm regulator valve branch in oxygen side combined diaphragm regulator valve device 9, and so on, Q Om_min The minimum gas flow for the membrane regulator valve in the mth membrane regulator valve branch of the oxygen side combined membrane regulator valve device 9.
Therefore, the flow range of the hydrogen side combined diaphragm regulating valve device 6 capable of accurately regulating and controlling the pressure is as follows:
Q Hn_min ～Q H1_max +Q H2_max +…+Q Hn_max ；
the flow range of the oxygen side combined diaphragm regulating valve device 9 capable of accurately regulating and controlling the pressure is as follows:
Q Om_min ～Q O1_max +Q O2_max +…+Q Om_max 。
if it is possible to precisely control the maximum gas pressure compared to a gas diaphragm regulating valve of the same levelFlow rate Q max In m 3 /h, and Q max ＝Q H1_max There must be a minimum gas flow Q at which the pressure can be precisely controlled min In m 3 And the minimum gas flow is smaller than the minimum regulating flow of the combined diaphragm regulating valve device, Q min ＞Q Hn_min The same applies to the oxygen side combined diaphragm control valve means 9. Therefore, the combined diaphragm valve regulating system can greatly widen the flow range of the accurate control pressure of the hydrogen side and the oxygen side of the alkaline water electrolysis hydrogen production system, thereby expanding the gas generation rate range and the working power range of the alkaline water electrolysis hydrogen production system.
As shown in fig. 3, a control method of an alkaline water electrolysis hydrogen production system for controlling a combined diaphragm regulating valve device in the alkaline water electrolysis hydrogen production system, the method comprising the steps of:
(1) The flow distributor obtains the gas flow generated by the alkaline electrolyzed water hydrogen production system;
(2) Judging whether any diaphragm regulating valve branch in the combined diaphragm regulating valve device has gas flow data, if so, executing the step (3), and if not, starting the diaphragm regulating valve branch with the highest gas flow range;
(3) Judging whether the gas flow generated by the alkaline water electrolysis hydrogen production system is in a regulating section of the currently-started diaphragm regulating valve branch circuit capable of accurately regulating and controlling the pressure, if so, keeping the current diaphragm regulating valve branch circuit to operate, otherwise, selecting the corresponding diaphragm regulating valve branch circuit to operate according to the gas flow generated by the alkaline water electrolysis hydrogen production system and the flow range of the current diaphragm regulating valve branch circuit.
The step (3) is specifically as follows:
(31) Calculating whether the gas flow generated by the alkaline water electrolysis hydrogen production system is in an edge + -phi interval of the gas flow range of the current diaphragm regulating valve branch, if so, executing the step (32), otherwise, keeping the current diaphragm regulating valve branch running;
(32) Judging whether the change rate of the gas flow generated by the alkaline water electrolysis hydrogen production system is more than or equal to +/-delta, if so, then: when the gas flow rate generated by the alkaline water electrolysis hydrogen production system is higher than-phi of the upper limit of the gas flow rate of the current diaphragm regulating valve branch and the gas flow rate change rate is greater than or equal to +delta, a diaphragm regulating valve branch with a higher gas flow rate range is started, and when the gas flow rate generated by the alkaline water electrolysis hydrogen production system is lower than +phi of the lower limit of the gas flow rate of the current diaphragm regulating valve branch and the gas flow rate change rate is less than or equal to-delta, a diaphragm regulating valve branch with a lower gas flow rate range is started; otherwise, the current diaphragm regulating valve branch is kept to operate.
The embodiment is provided with an alkaline water electrolysis hydrogen production system, wherein a hydrogen side combined diaphragm regulating valve device 6 and an oxygen side combined diaphragm regulating valve device 9 are respectively provided with 4 diaphragm regulating valve branches, and the flow ranges of the 4 diaphragm regulating valves are as follows: the flow range of the 1 st diaphragm regulating valve is 250-350 m 3 The flow range of the 2 nd diaphragm regulating valve is 200-300 m 3 The flow range of the 3 rd diaphragm regulating valve is 100-200 m 3 The flow range of the 4 th diaphragm regulating valve is 50-100 m 3 And/h. Therefore, the combined diaphragm regulating valve system can accurately control the flow interval of pressure to be far greater than that of a single gas diaphragm regulating valve with the same technical level.
Referring to fig. 4, an embodiment of a combined diaphragm control valve system and a method for managing the same will be described with reference to fig. 5, in which a combined diaphragm control valve is used to control a gas diaphragm valve at different flow rates, taking a hydrogen side gas flow rate of an alkaline water electrolysis hydrogen production plant as an example. Adjusting interval edge value condition + -phi = + -30m in judging condition 3 Rate of flow change ± Δ= ± 30m 3 /h·s。
Before the time t=0s, the hydrogen flow rate produced by the hydrogen production equipment is stabilized at 340m 3 And/h, so that the combined diaphragm valve system starts the 1 st diaphragm regulating valve, and the 1 st diaphragm regulating valve can accurately control the flow interval of pressure to be 250-350 m 3 The gas flow rate is within the regulating section of the diaphragm valve and is at the same time-30 m of the upper limit of the regulating section of the 1 st diaphragm regulating valve 3 And/h.s, but the rate of change of the air flow is zero, so the 1 st diaphragm regulating valve is still activated.
The hydrogen flow gradually decreases to 280m between t=1 and 6s 3 The gas flow is in the regulating section of the diaphragm valve and is still more than or equal to +30m of the lower limit of the regulating section of the 1 st diaphragm regulating valve 3 /h, i.e. 280m 3 /h, and the airflow change rate is greater than-30 m 3 And/h.s, thus still enabling the 1 st diaphragm regulator valve.
At t=6-7 s, the flow of hydrogen produced by hydrogen production equipment is stabilized at 280m 3 The combined diaphragm valve system starts a 1 st diaphragm regulating valve, and the 1 st diaphragm regulating valve can accurately control the flow interval of pressure to be 250-350 m 3 The gas flow is in the regulating section of the diaphragm valve and is still more than or equal to +30m of the lower limit of the regulating section of the 1 st diaphragm regulating valve 3 /h, i.e. 280m 3 And the rate of change of air flow is zero, thus still enabling the 1 st diaphragm regulator valve.
At t=8s, the hydrogen flow rate produced by the hydrogen production plant is reduced to 280m 3 The combined diaphragm valve system starts the 1 st diaphragm regulating valve, and the 1 st diaphragm regulating valve can accurately control the flow interval of pressure to be 250-350 m m 3 The gas flow is in the regulating section of the diaphragm valve and is smaller than +30m of the lower limit of the regulating section of the 1 st diaphragm regulating valve 3 /h, i.e. 280m 3 And the airflow change rate is less than or equal to-30 m 3 And/h.s, thus requiring activation of a lower level diaphragm regulator valve, in combination with the current activation of the 1 st diaphragm regulator valve, thus modifying the activation of the 2 nd diaphragm regulator valve.
At t=9-10 s, the hydrogen flow produced by the hydrogen production equipment gradually decreases to 210m 3 The combined diaphragm valve system starts a 2 nd diaphragm regulating valve, and the 2 nd diaphragm regulating valve can accurately control the flow interval of pressure to be 200-300 m 3 The gas flow rate is within the diaphragm valve adjusting section, although being less than +30m of the lower limit of the adjusting section of the 2 nd diaphragm adjusting valve 3 /h, i.e. 230m 3 And/h, but the airflow change rate is greater than or equal to-30 m 3 And/h.s, thus still enabling the 2 nd diaphragm regulator valve.
At t=11s, the hydrogen flow rate produced by the hydrogen production plant drops to 190m 3 And/h, the combined diaphragm valve system has activated the 2 nd diaphragm regulating valve,the flow interval of the 2 nd diaphragm regulating valve capable of accurately controlling pressure is 200-300 m 3 And/h, the gas flow is smaller than that in the diaphragm valve regulating interval, so that a lower-stage diaphragm regulating valve needs to be started, and the 2 nd diaphragm regulating valve is started at present, so that the 3 rd diaphragm regulating valve is started.
At t=12-13 s, the hydrogen flow produced by the hydrogen production equipment gradually decreases to 110m 3 The combined diaphragm valve system starts a 3 rd diaphragm regulating valve, and the 3 rd diaphragm regulating valve can accurately control the flow interval of pressure to be 100-200 m 3 The gas flow is within the regulating section of the diaphragm valve and is less than +30m of the lower limit of the regulating section of the 2 nd diaphragm regulating valve 3 /h, i.e. 130m 3 And/h, but the airflow change rate is less than or equal to-30 m 3 And/h.s, thus enabling the 4 th diaphragm regulator valve.
At t=14-15 s, the hydrogen flow rate produced by the hydrogen production equipment is reduced and maintained at 70m 3 The combined diaphragm valve system starts the 4 th diaphragm regulating valve, and the 4 th diaphragm regulating valve can accurately control the flow interval of pressure to be 0-100 m 3 The gas flow is within the regulating section of the diaphragm valve and is more than or equal to minus 30m of the lower limit of the regulating section of the 2 nd diaphragm regulating valve 3 /h, i.e. 70m 3 And/h, but the rate of change of the air flow is zero, so the 4 th diaphragm regulator valve is still activated.
At t=16s, the hydrogen flow rate produced by the hydrogen plant rises to 100m 3 The combined diaphragm valve system starts the 4 th diaphragm regulating valve, and the 4 th diaphragm regulating valve can accurately control the flow interval of pressure to be 0-100 m 3 The gas flow is within the regulating section of the diaphragm valve and is more than or equal to minus 30m < 3 >/h, namely 70m, of the lower limit of the regulating section of the 2 nd diaphragm regulating valve 3 And/h, the airflow change rate is more than or equal to +30m 3 And/h.s, thus activating the 3 rd diaphragm regulator valve.
At t=17-20 s, the flow of hydrogen produced by the hydrogen production equipment is increased and stabilized at 120m 3 The combined diaphragm valve system starts a 3 rd diaphragm regulating valve, and the 3 rd diaphragm regulating valve can accurately control the flow interval of pressure to be 100-200 m 3 And/h, the gas flow is smaller than the regulation of the No. 2 diaphragm regulating valve in the diaphragm valve regulating interval+30m of lower limit of interval 3 /h, i.e. 130m 3 And/h, but the airflow change rate is greater than or equal to-30 m 3 And/h.s, thus still enabling the 3 rd diaphragm regulator valve.
The above embodiments are merely examples, and do not limit the scope of the present invention. These embodiments may be implemented in various other ways, and various omissions, substitutions, and changes may be made without departing from the scope of the technical idea of the present invention.
Claims (2)
1. The control method of the alkaline electrolyzed water hydrogen production system comprises an alkaline electrolyzed water hydrogen production device and an alkali liquor circulation device, wherein the alkaline electrolyzed water hydrogen production device comprises an electrolytic tank (1), an oxygen side gas-liquid separator (11) and a hydrogen side gas-liquid separator (7), the alkali liquor circulation device is connected with the alkaline electrolyzed water hydrogen production device, the control method is characterized by also comprising 2 combined diaphragm regulating valve devices which are respectively arranged at the gas output ends of the oxygen side gas-liquid separator (11) and the hydrogen side gas-liquid separator (7),
the alkali liquor circulating device comprises an alkali liquor replenishing pump (12), an alkali liquor filter (13), an alkali liquor circulating pump (14), an alkali liquor tank (15), an alkali liquor circulating heat exchanger (3), a cooling water tank (4) and a cooling water pump (5), wherein the input end of the alkali liquor filter (13) is connected to the alkali liquor output ends of the oxygen side gas-liquid separator (11) and the hydrogen side gas-liquid separator (7), the output end of the alkali liquor filter (13) is connected to the alkali liquor input end of the electrolytic tank (1) sequentially through the alkali liquor circulating pump (14) and the alkali liquor circulating heat exchanger (3), the alkali liquor circulating heat exchanger (3) is also connected with the cooling water tank (4) through the cooling water pump (5) to form a heat exchange loop, and the input end of the alkali liquor filter (13) is also connected with the alkali liquor tank (15) through the replenishing pump (12) for replenishing;
the combined diaphragm regulating valve device is used for discharging gas during hydrogen production by alkaline water electrolysis, and comprises a plurality of diaphragm regulating valve branches with different gas flow ranges and flow distributors for flow distribution of each branch, wherein the diaphragm regulating valve branches are arranged in parallel, and the flow distributors are respectively connected with the diaphragm regulating valve branches, and at least 1 diaphragm regulating valve branch works in the working process;
a method of controlling a system for controlling a combined diaphragm control valve apparatus in the system, the method comprising the steps of:
(1) The flow distributor obtains the gas flow generated by the alkaline electrolyzed water hydrogen production system;
(2) Judging whether any diaphragm regulating valve branch in the combined diaphragm regulating valve device has gas flow data, if so, executing the step (3), and if not, starting the diaphragm regulating valve branch with the highest gas flow range;
(3) Judging whether the gas flow generated by the alkaline water electrolysis hydrogen production system is in a regulating section which is used currently and can accurately regulate and control the pressure of the diaphragm regulating valve branch, if so, keeping the current diaphragm regulating valve branch to operate, otherwise, selecting the corresponding diaphragm regulating valve branch to operate according to the gas flow generated by the alkaline water electrolysis hydrogen production system and the flow range of the current diaphragm regulating valve branch;
the step (3) is specifically as follows:
(31) Calculating whether the gas flow generated by the alkaline water electrolysis hydrogen production system is in an edge + -phi interval of the gas flow range of the current diaphragm regulating valve branch, if so, executing the step (32), otherwise, keeping the current diaphragm regulating valve branch running;
(32) Judging whether the change rate of the gas flow generated by the alkaline water electrolysis hydrogen production system is more than or equal to +/-delta, if so, then: when the gas flow rate generated by the alkaline water electrolysis hydrogen production system is higher than-phi of the upper limit of the gas flow rate of the current diaphragm regulating valve branch and the gas flow rate change rate is greater than or equal to +delta, a diaphragm regulating valve branch with a higher gas flow rate range is started, and when the gas flow rate generated by the alkaline water electrolysis hydrogen production system is lower than +phi of the lower limit of the gas flow rate of the current diaphragm regulating valve branch and the gas flow rate change rate is less than or equal to-delta, a diaphragm regulating valve branch with a lower gas flow rate range is started; otherwise, keeping the current diaphragm regulating valve branch to run;
the diaphragm regulating valve branch circuits comprise diaphragm regulating valves and flow meters which are sequentially connected in series, and the diaphragm regulating valves and the flow meters of the diaphragm regulating valve branch circuits are connected to the flow distributor to form a closed-loop accurate regulating circuit;
the flow range of the diaphragm regulating valves in the diaphragm regulating valve branches arranged in parallel is configured to change according to a gradient form;
the flow range of the diaphragm regulating valve is specifically configured as follows:
Q g1_max ＞Q g2_max ＞…＞Q gn_max ，
Q g1_min ＞Q g2_min ＞…＞Q gn_min ，
wherein Q is g1_max Maximum gas flow of diaphragm regulating valve in 1 st diaphragm regulating valve branch, Q g2_max Maximum gas flow of diaphragm regulating valve in 2 nd diaphragm regulating valve branch, Q gn_max Maximum gas flow of diaphragm regulating valve in nth diaphragm regulating valve branch, Q g1_min Minimum gas flow for diaphragm regulating valve in 1 st diaphragm regulating valve branch, Q g2_min Minimum gas flow for diaphragm regulating valve in 2 nd diaphragm regulating valve branch, Q gn_min The minimum gas flow of the diaphragm regulating valve in the nth diaphragm regulating valve branch is obtained, and n is the total number of diaphragm regulating valve branches.
2. The method of claim 1, wherein the flow distributor is configured to select the microprocessor chip that operates in response to the diaphragm regulator valve branch based on the gas flow demand.
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| CN112899706B (en) * | 2021-01-18 | 2023-11-07 | 阳光氢能科技有限公司 | Water electrolysis hydrogen production system and control method thereof |
| CN112760679A (en) * | 2021-01-27 | 2021-05-07 | 苏州竞立制氢设备有限公司 | Differential pressure adjusting method and device |
| CN214612785U (en) * | 2021-01-27 | 2021-11-05 | 苏州竞立制氢设备有限公司 | Pressure difference adjusting device |
| CN113089022B (en) * | 2021-04-29 | 2023-10-03 | 中国华能集团清洁能源技术研究院有限公司 | Alkaline liquor circulation system of alkaline hydrogen production electrolytic tank and working method thereof |
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| CN114134527B (en) * | 2021-12-15 | 2024-03-12 | 考克利尔竞立(苏州)氢能科技有限公司 | Water electrolysis hydrogen production device and method with multiple electrolytic tanks |
| CN114808029B (en) * | 2022-04-14 | 2023-09-01 | 华中科技大学 | Thermal management adjusting system for alkaline water electrolysis hydrogen production and adjusting method thereof |
| CN114921811A (en) * | 2022-04-28 | 2022-08-19 | 同济大学 | Alkali liquor concentration control system and method for alkaline electrolysis system |
| CN115011999B (en) * | 2022-05-26 | 2023-08-29 | 同济大学 | High-precision active pressure control method for alkaline water electrolysis tank |
| CN115992370B (en) * | 2022-12-26 | 2024-01-30 | 陕西华秦新能源科技有限责任公司 | Wide-power fluctuation operation device and method for alkaline water electrolysis hydrogen production system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101484861A (en) * | 2006-05-05 | 2009-07-15 | 普拉斯科能源Ip控股公司毕尔巴鄂-沙夫豪森分公司 | A gas homogenization system |
| CN202881396U (en) * | 2012-10-18 | 2013-04-17 | 王可全 | Oxy-hydrogen gas generator |
| CN105862066A (en) * | 2016-06-17 | 2016-08-17 | 淳华氢能科技股份有限公司 | High-pressure proton membrane water electrolysis device and method |
| CN110686231A (en) * | 2019-10-12 | 2020-01-14 | 北京金茂绿建科技有限公司 | Thermal power plant peak regulation system based on hydrogen production by water electrolysis |
| CN212688189U (en) * | 2020-03-31 | 2021-03-12 | 同济大学 | Combined diaphragm regulating valve device and alkaline electrolyzed water hydrogen production system |
-
2020
- 2020-06-18 CN CN202010560970.2A patent/CN111850591B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101484861A (en) * | 2006-05-05 | 2009-07-15 | 普拉斯科能源Ip控股公司毕尔巴鄂-沙夫豪森分公司 | A gas homogenization system |
| CN202881396U (en) * | 2012-10-18 | 2013-04-17 | 王可全 | Oxy-hydrogen gas generator |
| CN105862066A (en) * | 2016-06-17 | 2016-08-17 | 淳华氢能科技股份有限公司 | High-pressure proton membrane water electrolysis device and method |
| CN110686231A (en) * | 2019-10-12 | 2020-01-14 | 北京金茂绿建科技有限公司 | Thermal power plant peak regulation system based on hydrogen production by water electrolysis |
| CN212688189U (en) * | 2020-03-31 | 2021-03-12 | 同济大学 | Combined diaphragm regulating valve device and alkaline electrolyzed water hydrogen production system |
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