CN109958882B - Integrated control system for hydrogen production by water electrolysis and alloy hydrogen storage - Google Patents
Integrated control system for hydrogen production by water electrolysis and alloy hydrogen storage Download PDFInfo
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- CN109958882B CN109958882B CN201711439187.5A CN201711439187A CN109958882B CN 109958882 B CN109958882 B CN 109958882B CN 201711439187 A CN201711439187 A CN 201711439187A CN 109958882 B CN109958882 B CN 109958882B
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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
- 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
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
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- 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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
The invention discloses an integrated control system for hydrogen production by water electrolysis and alloy hydrogen storage, which comprises a hydrogen production device by water electrolysis, wherein a hydrogen production outlet of the hydrogen production device is connected with a hydrogen production inlet of an explosion-proof hydrogen absorption and release control cabinet through a hydrogen purification tank, a storage tank interface of the explosion-proof hydrogen absorption and release control cabinet is connected with tank openings of a plurality of hydrogen storage tanks in antifreeze liquid in a hydrogen storage water bath box, the hydrogen storage tanks are filled with hydrogen storage alloy, a hydrogen output port of the explosion-proof hydrogen absorption and release control cabinet is connected with a hydrogen output pipeline, an antifreeze liquid outlet of the hydrogen storage water bath box is connected with a hydrogen storage end water inlet of a temperature rise and fall control cabinet, the antifreeze liquid inlet of the hydrogen storage water bath box is connected with a hydrogen storage end water outlet of a temperature rise and fall control cabinet through a water pump, and the hydrogen production end water outlet of the temperature rise and fall control cabinet. The hydrogen storage tank and the water electrolysis hydrogen production device are effectively and thermally coupled, so that the hydrogen production and storage efficiency is greatly improved, the renewable energy utilization efficiency is high, the energy consumption is low, and the operation and maintenance cost is low.
Description
Technical Field
The invention relates to an integrated control system for hydrogen production by water electrolysis and alloy hydrogen storage, belonging to the technical field of energy source interaction between hydrogen production by water electrolysis and alloy hydrogen storage.
Background
In recent years, in the field of renewable energy application, energy supply fluctuation caused by natural conditions and wind and water abandoning and light abandoning waste caused by power grid load are increasingly prominent, meanwhile, hydrogen is taken as an important industrial raw material and a power generation raw material of a fuel cell, more and more attention is paid, and hydrogen production by using renewable energy becomes an important way for solving the problem of wind, water abandoning and light abandoning.
The alloy hydrogen storage technology can realize hydrogen charging and discharging in a normal temperature environment, has extremely high hydrogen storage density which is close to liquid hydrogen storage, has hydrogen absorption pressure which is only one fifth of the pressure required by a common gaseous hydrogen storage cylinder, is suitable for being connected with various hydrogen production equipment, and is the most matched hydrogen storage technology for hydrogen production by renewable energy sources.
However, the widely applied electrolytic hydrogen production technology at present has higher requirements on the stability of the environmental temperature, the preheating starting time in cold regions is too long, the preheating starting time cannot be matched with the volatility of renewable energy sources, the requirement of quick reaction starting is met, and the shutdown is easily caused due to the difficulty in heat dissipation in high-temperature time. On the other hand, the huge hydrogen storage density of the alloy hydrogen storage technology causes that a large amount of heat absorption is needed in the hydrogen desorption process of the hydrogen storage system, the hydrogen desorption too fast in a short time causes the temperature of the hydrogen storage alloy to drop sharply, the effective hydrogen desorption amount of the alloy is reduced, the alloy needs a large amount of heat release when absorbing hydrogen, otherwise, the increase of the temperature of the alloy can greatly reduce the hydrogen storage capacity and the hydrogen absorption speed.
Although the temperature of the hydrogen production device is regulated by the auxiliary heating and cooling system in the design and manufacturing process of the hydrogen production and storage equipment in the prior art, the energy consumption is higher, the utilization efficiency of renewable energy sources is reduced, and the manufacturing and operating cost of the hydrogen production device is greatly improved. In addition, the existing hydrogen storage device matched with large-scale water electrolysis hydrogen production generally takes a gaseous hydrogen storage cylinder as a main part, does not consider the hydrogen supply mechanism and required conditions of the alloy hydrogen storage tank, is not thermally coupled with a hydrogen production system, and effectively manages the design of hydrogen flow and waste heat circulation efficiency, so that the effective hydrogen utilization efficiency of the alloy hydrogen storage tank cannot reach the optimum, and the maximum hydrogen storage efficiency of the solid-state hydrogen storage device cannot be exerted.
Disclosure of Invention
The invention aims to provide an integrated control system for hydrogen production by water electrolysis and alloy hydrogen storage, which realizes the great improvement of hydrogen production and storage efficiency by effectively coupling a hydrogen storage tank and a water electrolysis hydrogen production device, and has the advantages of high renewable energy utilization efficiency, low energy consumption and low operation and maintenance cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
an integrated control system for hydrogen production by water electrolysis and alloy hydrogen storage is characterized in that: the device comprises a water electrolysis hydrogen production device, wherein a hydrogen production outlet of the water electrolysis hydrogen production device is connected with a hydrogen production inlet of an explosion-proof hydrogen absorption and release control cabinet through a hydrogen purification tank, a storage tank interface of the explosion-proof hydrogen absorption and release control cabinet is connected with tank openings of a plurality of hydrogen storage tanks in antifreeze liquid in a hydrogen storage water bath box, the hydrogen storage tanks are filled with hydrogen storage alloy, a hydrogen output port of the explosion-proof hydrogen absorption and release control cabinet is connected with a hydrogen output pipeline, an antifreeze liquid outlet of the hydrogen storage water bath box is connected with a hydrogen storage end water inlet of a temperature rise and fall control cabinet, an antifreeze liquid inlet of the hydrogen storage water bath box is connected with a hydrogen storage end water outlet of the temperature rise and fall control cabinet through a water pump, and a hydrogen production end water inlet and a hydrogen production end water outlet of the temperature rise and fall.
The invention has the advantages that:
the hydrogen absorption, heat release and hydrogen desorption of the hydrogen in the hydrogen storage tank are thermally coupled with the cooling circulation system of the electrolytic water hydrogen production device, so that the electrolytic water hydrogen production device can accelerate the starting operation and reduce the refrigeration energy consumption, the temperature rising and lowering efficiency of the temperature of the electrolytic tank is greatly improved, the temperature rising and lowering speed is high, the electrolytic water hydrogen production device can be effectively ensured to be in a stable operation state with low power and high efficiency for a long time, the influence of the volatility of renewable energy sources can be reliably borne, the hydrogen storage tank and the electrolytic water hydrogen production device can realize matched operation, the hydrogen storage tank and the electrolytic water hydrogen production device can both reach the optimal working state, and the operation.
Drawings
FIG. 1 is a schematic diagram of the composition of the integrated control system for hydrogen production by water electrolysis and alloy hydrogen storage.
Fig. 2 is a schematic diagram of the components of the elevating temperature control cabinet.
FIG. 3 is a schematic diagram of the composition of an explosion-proof hydrogen absorption control cabinet.
Detailed Description
As shown in FIGS. 1 to 3, the integrated control system for hydrogen production by water electrolysis and alloy hydrogen storage comprises a hydrogen production device 10 by water electrolysis, wherein the hydrogen production outlet of the hydrogen production device 10 by water electrolysis is connected with the hydrogen production inlet of an explosion-proof hydrogen absorption and release control cabinet 30 through a hydrogen purification tank 40, the storage tank interface of the explosion-proof hydrogen absorption and release control cabinet 30 is connected with the tank openings of a plurality of hydrogen storage tanks 22 in antifreeze solution in a hydrogen storage water bath 21, the hydrogen storage tanks 22 are filled with hydrogen storage alloy, the hydrogen output port of the explosion-proof hydrogen absorption and release control cabinet 30 is connected with a hydrogen output pipeline 90, the antifreeze solution outlet of the hydrogen storage water bath 21 is connected with the hydrogen storage end water inlet of a lifting temperature control cabinet 50, the antifreeze solution inlet of the hydrogen storage water bath 21 is connected with the hydrogen storage end water outlet of the lifting temperature control cabinet 50 through a water pump 80, and the hydrogen production end water inlet and the hydrogen production end water outlet of the lifting temperature control cabinet, The water inlets are connected.
As shown in the drawing, a plurality of tank gauge thermometers 61 are attached to the outer surface of each hydrogen storage tank 22, and the tank gauge thermometers 61 are preferably arranged evenly on the surface of the hydrogen storage tank 22. An inlet thermometer 62 is installed at the antifreeze inlet of the hydrogen storage water bath tank 21, an outlet thermometer 63 is installed at the antifreeze outlet of the hydrogen storage water bath tank 21, and a circulating water flowmeter 71 is installed on a pipeline connected between the antifreeze inlet of the hydrogen storage water bath tank 21 and the water pump 80. The water outlet thermometer 64 and the water inlet thermometer 65 are respectively arranged at the water inlet of the hydrogen production end and the water outlet of the hydrogen production end of the temperature-raising control cabinet 50. A hydrogen purity meter 73 is arranged on a pipeline connected between the output port of the hydrogen purification tank 40 and the hydrogen production inlet of the explosion-proof hydrogen absorption and release control cabinet 30. The hydrogen flow meter 72 for detecting the flow rate of hydrogen fed into the hydrogen storage tank 22 and the hydrogen output pipeline 90 is installed in the explosion-proof hydrogen absorption and release control cabinet 30. A hydrogen pressure gauge 74 is attached to a pipe connected to the opening of the hydrogen storage tank 22.
In the actual design, the control interfaces of the explosion-proof hydrogen absorption and release control cabinet 30, the lifting temperature control cabinet 50, the water pump 80 and the metering devices are respectively connected with the corresponding control ports of the control system, wherein: the control system comprises one or more of a PLC (programmable logic controller), an MCU (microprogrammed control unit) or a DSP (digital signal processor) high-speed digital signal processor. In addition, the control system can communicate with a remote monitoring center through a network to realize remote monitoring.
In the present invention, the metering devices are a tank gauge thermometer 61, an inlet thermometer 62, an outlet thermometer 63, a circulating water flow meter 71, an outlet thermometer 64, an inlet thermometer 65, a hydrogen purity meter 73, a hydrogen flow meter 72, and a hydrogen pressure gauge 74.
As shown in fig. 3, the explosion-proof hydrogen absorption and release control cabinet 30 comprises an explosion-proof cabinet body, a hydrogen flowmeter 72 is arranged in the explosion-proof cabinet body, a hydrogen production inlet 35 of the explosion-proof hydrogen absorption and release control cabinet 30 sequentially passes through the first pneumatic valve 31, the hydrogen flowmeter 72 and the second pneumatic valve 32 and then is connected with the storage tank interface 36 of the explosion-proof hydrogen absorption and release control cabinet 30, the common end of the first pneumatic valve 31 and the hydrogen flowmeter 72 is connected with the storage tank interface 36 of the explosion-proof hydrogen absorption and release control cabinet 30 through the fourth pneumatic valve 34, and the common end of the hydrogen flowmeter 72 and the second pneumatic valve 32 is connected with the hydrogen output port 37 of the explosion-proof hydrogen absorption and release control cabinet 30 through the third. The first to fourth pneumatic valves 31 to 34 are connected to and controlled by a control system.
As shown in fig. 2, the temperature-raising and lowering control cabinet 50 comprises a cabinet body, a water cooling machine 51 is arranged in the cabinet body, a hydrogen production end water inlet 58 of the temperature-raising and lowering control cabinet 50 is connected with a hydrogen production end water outlet 59 of the temperature-raising and lowering control cabinet 50 after sequentially passing through a water outlet thermometer 64, the water cooling machine 51 and a water inlet thermometer 65, the water outlet thermometer 64 and a common end of the water cooling machine 51 are divided into two paths, one path is connected with the common end of the water inlet thermometer 65 and the water cooling machine 51 through a first electromagnetic valve 52 and a third electromagnetic valve 54 sequentially, the other path is connected with the common end of the water inlet thermometer 65 and the water cooling machine 51 through a second electromagnetic valve 53 and a fourth electromagnetic valve 55 sequentially, the common end of the first electromagnetic valve 52 and the third electromagnetic valve 54 is connected with a hydrogen storage end water outlet 57 of the temperature-raising and lowering control cabinet 50, and the common end. The water cooling machine 51 and the first to fourth electromagnetic valves 52 to 55 are connected with a control system and controlled by the control system.
In the present invention, the water electrolysis hydrogen production apparatus 10 is an alkaline or SPE (solid polymer electrolyte, water electrolysis oxygen production technology) water electrolysis hydrogen production apparatus that produces hydrogen by using renewable energy (such as wind energy). The water electrolysis hydrogen production apparatus 10 is well known in the art, and therefore, the configuration and operation principle thereof are not described in detail here.
In the present invention, the hydrogen storage alloy may be AB system or AB2Is an alloy. AB-series alloy such as TiFe alloy, AB2Alloys of this series, e.g. selected from TiMn2And (3) alloying. The hydrogen storage process and principle of the hydrogen storage tank 22 by means of the hydrogen storage alloy are well known in the art and thus will not be described in detail herein.
In the present invention, the hydrogen purification tank 40, the hydrogen storage water bath 21, the antifreeze, the hydrogen storage tank 22, and the hydrogen storage alloy are well known in the art and will not be described in detail here.
The working process of the invention is as follows:
the water electrolysis hydrogen production device 10 is started to start hydrogen production work, and at the moment, the temperature of an electrolytic bath of the water electrolysis hydrogen production device 10 is low, so that the water electrolysis hydrogen production device operates at low efficiency. At this time, the explosion-proof hydrogen absorption and release control cabinet 30 is controlled by the control system to start the hydrogen absorption mode, and the hydrogen produced by the water electrolysis hydrogen production device 10 is sent to the hydrogen storage tank 22 for storage through the explosion-proof hydrogen absorption and release control cabinet 30 after the hydrogen is subjected to oxygen removal and water vapor purification treatment (ensuring the quality of the hydrogen and reducing the impurity content by more than 90%) through the hydrogen purification tank 40, thereby completing the hydrogen absorption process. During hydrogen absorption, the hydrogen pressure gauge 74, the hydrogen flow meter 72, and the hydrogen purity meter 73 monitor the pressure, flow rate, and purity of the delivered hydrogen gas, respectively, and the tank gauge thermometers 61 monitor the temperature of the hydrogen storage tank 22 at each location in real time.
In the hydrogen absorption process, the antifreeze solution with lower temperature in the water electrolysis hydrogen production device 10 is sent into the hydrogen storage water bath 21 through the lifting temperature control cabinet 50 under the driving of the water pump 80, the antifreeze solution is heated in the hydrogen storage water bath 21 due to the heat release of the hydrogen in the hydrogen storage tank 22, and then the antifreeze solution with increased temperature flows out of the antifreeze solution outlet of the hydrogen storage water bath 21 and is sent into the water electrolysis hydrogen production device 10 through the lifting temperature control cabinet 50, so that the temperature of the electrolytic bath is rapidly increased. In this process, the inlet thermometer 62 and the outlet thermometer 63 respectively monitor the temperature of the antifreeze solution entering and exiting the hydrogen storage water bath 21, the circulating water flowmeter 71 monitors the flow rate of the antifreeze solution in the circulating flow, and the inlet thermometer 65 and the outlet thermometer 64 respectively monitor the temperature of the antifreeze solution flowing out and into the electrolytic hydrogen production apparatus 10.
The hydrogen absorption process is continuously carried out until the temperature of the electrolytic cell of the water electrolysis hydrogen production device 10 reaches a reasonable range (usually 80 ℃), so that the device can be operated efficiently for a long time.
When the temperature of the electrolytic cell of the water electrolysis hydrogen production device 10 is too high and exceeds a reasonable range, the explosion-proof hydrogen absorption and release control cabinet 30 starts a hydrogen release mode under the control of the control system, and the hydrogen in the hydrogen storage tank 22 is output from the hydrogen output pipeline 90 through the explosion-proof hydrogen absorption and release control cabinet 30, so that the hydrogen release process is completed. During the hydrogen discharge, the hydrogen pressure gauge 74 and the hydrogen flow meter 72 monitor the pressure and the flow rate of the hydrogen gas to be delivered, and the tank gauge thermometers 61 monitor the temperature of the hydrogen storage tank 22 at each position in real time.
In the hydrogen discharge process, under the driving of the water pump 80, the antifreeze solution with the over-high temperature in the water electrolysis hydrogen production device 10 is cooled in advance by the water cooling machine 51 of the lifting temperature control cabinet 50 and then is sent into the hydrogen storage water bath box 21, the antifreeze solution is cooled in the hydrogen storage water bath box 21 because the hydrogen in the hydrogen storage tank 22 absorbs heat, and then the antifreeze solution with the reduced temperature flows out of the antifreeze solution outlet of the hydrogen storage water bath box 21 and is sent into the water electrolysis hydrogen production device 10 by the lifting temperature control cabinet 50, so that the temperature of the electrolytic bath is rapidly reduced to a reasonable range. In this process, the inlet thermometer 62 and the outlet thermometer 63 respectively monitor the temperature of the antifreeze solution entering and exiting the hydrogen storage water bath 21, the circulating water flowmeter 71 monitors the flow rate of the antifreeze solution in the circulating flow, and the inlet thermometer 65 and the outlet thermometer 64 respectively monitor the temperature of the antifreeze solution flowing out and into the electrolytic hydrogen production apparatus 10.
When the hydrogen storage tank 22 is full of hydrogen, the hydrogen produced by the water electrolysis hydrogen production device 10 is directly sent out through the explosion-proof hydrogen absorption and release control cabinet 30 and the hydrogen output pipeline 90.
Referring to fig. 2, the operation of the temperature control cabinet 50 is as follows:
when the hydrogen storage water bath is in the hydrogen absorption mode, the first electromagnetic valve 52 and the second electromagnetic valve 53 are opened, the third electromagnetic valve 54 and the fourth electromagnetic valve 55 are closed, and the low-temperature antifreeze enters the hydrogen production end water inlet 58 of the temperature rise and fall control cabinet 50 and is directly sent into the hydrogen storage water bath box 21 from the hydrogen storage end water outlet 57 of the temperature rise and fall control cabinet 50 through the water outlet thermometer 64 and the first electromagnetic valve 52. The antifreeze solution heated by the action of absorbing hydrogen and releasing heat is sent out from the hydrogen storage water bath 21, enters the water inlet 56 of the hydrogen storage end of the temperature rise and fall control cabinet 50, passes through the second electromagnetic valve 53, the water cooler 51 (running at non-full power) and the water inlet thermometer 65, and is sent into the electrolytic tank of the electrolytic water hydrogen production device 10 from the water outlet 59 of the hydrogen production end of the temperature rise and fall control cabinet 50.
When the water cooling machine 51 is in the hydrogen discharge mode, the water cooling machine 51 runs at full power, the third electromagnetic valve 54 and the fourth electromagnetic valve 55 are opened, the first electromagnetic valve 52 and the second electromagnetic valve 53 are closed, the high-temperature antifreeze liquid enters the hydrogen production end water inlet 58 of the temperature rise and fall control cabinet 50 and then flows to the water cooling machine 51 through the water outlet thermometer 64, the antifreeze liquid is cooled by the water cooling machine 51, and then is sent to the hydrogen storage water bath box 21 from the hydrogen storage end water outlet 57 of the temperature rise and fall control cabinet 50 through the third electromagnetic valve 54. The antifreeze solution cooled by the hydrogen releasing and absorbing action is sent out from the hydrogen storage water bath 21, enters the hydrogen storage end water inlet 56 of the temperature raising and lowering control cabinet 50, passes through the fourth electromagnetic valve 55 and the water inlet thermometer 65, and is sent into the electrolytic tank of the electrolyzed water hydrogen production apparatus 10 from the hydrogen production end water outlet 59 of the temperature raising and lowering control cabinet 50.
Referring to fig. 3, the operation process of the explosion-proof hydrogen absorption and desorption control cabinet 30 is as follows:
when the hydrogen storage tank is in the hydrogen absorption mode, the first pneumatic valve 31 and the second pneumatic valve 32 are opened, the third pneumatic valve 33 and the fourth pneumatic valve 34 are closed, and the prepared hydrogen enters the hydrogen production inlet 35 of the explosion-proof hydrogen absorption and release control cabinet 30, passes through the first pneumatic valve 31, the hydrogen flowmeter 72 and the second pneumatic valve 32, is output from the storage tank interface 36 of the explosion-proof hydrogen absorption and release control cabinet 30, and is sent to the hydrogen storage tank 22.
When the hydrogen release mode is set, the third and fourth pneumatic valves 33, 34 are opened, the first and second pneumatic valves 31, 32 are closed, and the hydrogen gas in the hydrogen storage tank 22 enters the tank interface 36 of the explosion-proof hydrogen absorption and release control cabinet 30, and then is sent out from the hydrogen gas output port 37 of the explosion-proof hydrogen absorption and release control cabinet 30 through the fourth pneumatic valve 34, the hydrogen gas flow meter 72, and the third pneumatic valve 33.
When the hydrogen storage tank 22 is full of hydrogen, the first and third pneumatic valves 31, 33 are opened, the second and fourth pneumatic valves 32, 34 are closed, and the hydrogen produced by the water electrolysis hydrogen production device 10 enters the hydrogen production inlet 35 of the explosion-proof hydrogen absorption and release control cabinet 30, and then is sent out from the hydrogen output port 37 of the explosion-proof hydrogen absorption and release control cabinet 30 through the first pneumatic valve 31, the hydrogen flow meter 72 and the third pneumatic valve 33.
In practical implementation, the control system can estimate the optimal operation curve of the hydrogen production device 10 by using the received detection data transmitted by each metering device, the power/temperature change curve of the electrolytic cell, the hydrogen storage alloy hydrogen discharge PCT curve, the thermal conductivity data and the like, so that the suction amount and discharge amount of hydrogen and the circulating feeding amount of antifreeze are effectively controlled in the hydrogen suction mode and the hydrogen discharge mode, the hydrogen storage water bath 21 and the electrolytic cell are subjected to reasonable and efficient heat exchange, the electrolytic cell realizes a rapid temperature rise and fall strategy, the renewable energy utilization rate of the hydrogen production device 10 is improved, the hydrogen storage tank 22 realizes efficient and reliable hydrogen storage, and the hydrogen storage tank 22 and the hydrogen production device 10 can be in the working state with the optimal temperature.
The invention has the advantages that:
1. the hydrogen production rate of the existing water electrolysis hydrogen production device depends on the natural temperature rise of the electrolytic cell during working to be passively adjusted, only an auxiliary heating system can be used for heating under special environment, the manufacturing cost is high, the energy consumption is high, and the hydrogen production rate cannot be effectively matched with renewable energy with larger fluctuation.
2. The highest pressure output by the existing water electrolysis hydrogen production device is generally between 3MPa and 4MPa, and AB (such as TiFe) or AB is mainly used for alloy hydrogen storage matched with the water electrolysis hydrogen production device2(e.g., TiMn)2) The hydrogen storage alloy has the effect of absorbing and releasing a large amount of hydrogen in a specific pressure interval, the pressure interval rises and falls along with the rise and fall of the temperature of the hydrogen storage alloy, and when the temperature is lower than a certain point, the pressure interval is lower than the atmospheric pressure, so that a large amount of hydrogen storage capacity cannot be utilized. Although the existing equipment also has the design of heating the hydrogen storage alloy by using circulating water, the specific temperature of the hydrogen storage alloy is not monitored, a circulating water system is not adjusted, the situation that heat supply and refrigeration cannot be thermally coupled easily occurs, and the effective hydrogen storage amount of the hydrogen storage alloy is reduced. In contrast, the invention can continuously monitor the surface temperature of the hydrogen storage tank and the pressure of hydrogen discharged, estimate the optimal hydrogen discharge amount required for maintaining the temperature according to the hydrogen discharge PCT curve of the hydrogen storage alloy and the heat conductivity of the hydrogen storage alloy powder block, and further adjust the flow rate of circulating water, so that the hydrogen storage tank and the water electrolysis hydrogen production device can reasonably match and operate, and the operating states can be kept to be optimal by both the temperatures.
The above description is of the preferred embodiment of the present invention and the technical principles applied thereto, and it will be apparent to those skilled in the art that any changes and modifications based on the equivalent changes and simple substitutions of the technical solutions of the present invention are within the protection scope of the present invention without departing from the spirit and scope of the present invention.
Claims (5)
1. An integrated control system for hydrogen production by water electrolysis and alloy hydrogen storage is characterized in that: it includes electrolytic water hydrogen manufacturing installation, electrolytic water hydrogen manufacturing installation's hydrogen manufacturing export links to each other with the hydrogen manufacturing import of explosion-proof hydrogen absorption and release switch board via hydrogen purification jar, the storage tank interface of explosion-proof hydrogen absorption and release switch board links to each other with the jar mouth of a plurality of hydrogen storage jar of arranging in the antifreeze of hydrogen storage water bath case in, pack hydrogen storage alloy in the hydrogen storage jar, the hydrogen delivery outlet of explosion-proof hydrogen absorption and release switch board links to each other there is hydrogen output pipeline, the antifreeze export of hydrogen storage water bath case links to each other with the hydrogen storage end water inlet of lift temperature switch board, the antifreeze import of hydrogen storage water bath case links to each other with the hydrogen storage end outlet of lift temperature switch board via the water pump, the hydrogen manufacturing end water inlet of lift temperature switch board, the hydrogen manufacturing end water outlet respectively with electrolytic water outlet, the water inlet links to:
a plurality of tank meter thermometers are arranged on the outer surface of each hydrogen storage tank;
an inlet thermometer is arranged at the position of an antifreeze inlet of the hydrogen storage water bath tank, an outlet thermometer is arranged at the position of an antifreeze outlet of the hydrogen storage water bath tank, and a circulating water flowmeter is arranged on a pipeline connected between the antifreeze inlet of the hydrogen storage water bath tank and the water pump;
a water outlet thermometer and a water inlet thermometer are respectively arranged at the water inlet of the hydrogen production end and the water outlet of the hydrogen production end of the elevating temperature control cabinet;
a hydrogen purity meter is arranged on a pipeline connected between the output port of the hydrogen purification tank and the hydrogen production inlet of the explosion-proof hydrogen absorption and release control cabinet;
a hydrogen flow meter for detecting the hydrogen flow sent into the hydrogen storage tank and the hydrogen output pipeline is arranged in the explosion-proof hydrogen absorption and release control cabinet;
a hydrogen pressure gauge is arranged on a pipeline connected with the tank opening of the hydrogen storage tank.
2. The integrated control system for hydrogen production by water electrolysis and alloy hydrogen storage according to claim 1, characterized in that:
the explosion-proof hydrogen control cabinet that inhales puts, the control interface of lift warm switch board, water pump, each metering equipment is connected with control system's corresponding control port respectively, wherein: the control system comprises one or more of a PLC (programmable logic controller), an MCU (microprogrammed control unit) or a DSP (digital signal processor) high-speed digital signal processor.
3. The integrated control system for hydrogen production by water electrolysis and alloy hydrogen storage according to claim 1, characterized in that:
the explosion-proof hydrogen control cabinet of inhaling puts includes the explosion-proof cabinet body, and the internal hydrogen flowmeter that is provided with of explosion-proof cabinet follows the hydrogen manufacturing import of explosion-proof hydrogen control cabinet of inhaling puts is in proper order via first pneumatic valve behind hydrogen flowmeter, the second pneumatic valve with the storage tank interface connection of explosion-proof hydrogen control cabinet of inhaling puts, first pneumatic valve with the common port of hydrogen flowmeter is connected via the fourth pneumatic valve the storage tank interface of explosion-proof hydrogen control cabinet of inhaling puts, the common port of hydrogen flowmeter and second pneumatic valve is connected via the third pneumatic valve the hydrogen delivery outlet of explosion-proof hydrogen control cabinet of inhaling puts.
4. The integrated control system for hydrogen production by water electrolysis and alloy hydrogen storage according to claim 1, characterized in that:
the cooling and heating control cabinet comprises a cabinet body, a water cooler is arranged in the cabinet body, a hydrogen production end water inlet of the cooling and heating control cabinet is sequentially connected with a hydrogen production end water outlet of the cooling and heating control cabinet, the hydrogen production end water inlet of the cooling and heating control cabinet is sequentially connected with a water outlet thermometer, the water cooler, a public end of the water outlet thermometer and the water cooler is divided into two paths, one path of water outlet thermometer is sequentially connected with the public end of the water cooler through a first electromagnetic valve and a third electromagnetic valve, the other path of water outlet thermometer is sequentially connected with the public end of the water cooler through a second electromagnetic valve and a fourth electromagnetic valve, the public end of the first electromagnetic valve and the public end of the third electromagnetic valve are connected with the hydrogen storage end water outlet of the cooling and heating control cabinet, and the public end of the second electromagnetic valve and the fourth electromagnetic valve are connected with.
5. The integrated control system for hydrogen production by water electrolysis and alloy hydrogen storage according to any one of claims 1 to 4, characterized in that:
the water electrolysis hydrogen production device is an alkaline or SPE water electrolysis hydrogen production device which utilizes renewable energy sources to produce hydrogen;
the hydrogen storage alloy is AB series or AB2Is an alloy.
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| CN112762347B (en) * | 2020-12-16 | 2022-05-06 | 淄博安泽特种气体有限公司 | Intelligent exhaust explosion-proof hydrogen storage cabinet |
| CN112921343B (en) * | 2021-02-20 | 2022-11-15 | 河北建投新能源有限公司 | Cold and hot hydrogen combined supply system and control method |
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