CN219653147U - Cooling liquid circulation system of alkali liquor heat exchanger and electrolytic water hydrogen production system - Google Patents
Cooling liquid circulation system of alkali liquor heat exchanger and electrolytic water hydrogen production system Download PDFInfo
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- CN219653147U CN219653147U CN202321282486.3U CN202321282486U CN219653147U CN 219653147 U CN219653147 U CN 219653147U CN 202321282486 U CN202321282486 U CN 202321282486U CN 219653147 U CN219653147 U CN 219653147U
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- alkali liquor
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- cooling liquid
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- 239000003513 alkali Substances 0.000 title claims abstract description 149
- 239000000110 cooling liquid Substances 0.000 title claims abstract description 126
- 239000001257 hydrogen Substances 0.000 title claims abstract description 77
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 77
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 73
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 133
- 238000001816 cooling Methods 0.000 claims abstract description 49
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 32
- 239000002826 coolant Substances 0.000 claims description 48
- 239000000203 mixture Substances 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 11
- 239000001301 oxygen Substances 0.000 description 11
- 229910052760 oxygen Inorganic materials 0.000 description 11
- 150000002431 hydrogen Chemical class 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model discloses a cooling liquid circulation system of an alkali liquor heat exchanger and a water electrolysis hydrogen production system, and belongs to the technical field of heat exchangers. The alkali liquor heat exchanger is used for cooling alkali liquor, and the cooling liquid circulation system comprises: the PH meter is arranged at the cooling liquid outlet of the alkali liquid heat exchanger and is used for collecting the PH value of the cooling liquid outlet; the liquid inlet of the liquid storage tank is connected with the cooling liquid outlet; the first valve is arranged between the liquid inlet of the liquid storage tank and the cooling liquid outlet; and the controller is electrically connected with the PH meter and the first valve, and is used for controlling the first valve to be opened and outputting the cooling liquid of the alkali liquid heat exchanger to the liquid storage tank for storage under the condition that the PH value is determined to be greater than or equal to a first target threshold value. The cooling liquid circulation system can prevent alkali liquor from polluting the system and improve the safety of the system.
Description
Technical Field
The utility model belongs to the technical field of heat exchangers, and particularly relates to a cooling liquid circulation system of an alkali liquor heat exchanger and a water electrolysis hydrogen production system.
Background
At present, a fixed tube-plate type heat exchanger is generally adopted as a medium in the alkali liquor cooler is strong corrosive KOH and other alkali liquor in the process of producing hydrogen by electrolyzing water, the operation temperature is higher, and capillary cracks can appear at the welded joint of a tube plate in the fixed tube-plate type heat exchanger and a heat exchange tube under the influence of temperature alternation and medium corrosion in the long-term operation process, so that trace alkali liquor in a tube pass enters circulating cooling liquid in a shell pass through the cracks, the cracks are tiny, the change of short-time internal pressure difference is not obvious, the problem that the alkali liquor enters a circulating cooling liquid system is difficult to find through pressure difference, the circulating cooling liquid system is polluted by the alkali liquor, and the operation safety risk exists.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the cooling liquid circulation system of the alkali liquid heat exchanger and the electrolyzed water hydrogen production system, which can prevent the pollution of alkali liquid to the cooling liquid circulation system and improve the safety of the cooling liquid circulation system.
In a first aspect, the present utility model provides a cooling liquid circulation system of an alkaline liquid heat exchanger, where the alkaline liquid heat exchanger is used for cooling and exchanging heat of an alkaline liquid of an electrolytic water hydrogen production device, and the cooling liquid circulation system includes:
the PH meter is arranged at the cooling liquid outlet of the alkali liquid heat exchanger and is used for collecting the PH value of the cooling liquid outlet;
the liquid inlet of the liquid storage tank is connected with the cooling liquid outlet;
the first valve is arranged between the liquid inlet of the liquid storage tank and the cooling liquid outlet;
and the controller is electrically connected with the PH meter and the first valve, and is used for controlling the first valve to be opened and outputting the cooling liquid of the alkali liquid heat exchanger to the liquid storage tank for storage under the condition that the PH value is determined to be greater than or equal to a first target threshold value.
According to the cooling liquid circulation system of the alkali liquid heat exchanger, the PH meter is arranged at the outlet of the alkali liquid heat exchanger, the first valve of the circulation system is controlled according to the PH measured value of the PH meter, and the cooling liquid with the PH value exceeding the first target threshold value is discharged to the liquid storage tank, so that pollution to the cooling liquid circulation system caused by alkali liquid leakage is effectively prevented, and the operation safety of the cooling liquid circulation system is improved.
According to one embodiment of the present utility model, further comprising: the liquid inlet of the cooling tower is connected with the cooling liquid outlet, the liquid outlet of the cooling tower is connected with the cooling liquid inlet of the alkali liquor heat exchanger, and the cooling tower is used for cooling the cooling liquid.
According to one embodiment of the present utility model, further comprising: the second valve is arranged between the liquid inlet of the cooling tower and the cooling liquid outlet, the second valve is electrically connected with the controller, and the controller is used for controlling the first valve to be closed and controlling the second valve to be opened under the condition that the PH value is determined to be smaller than the first target threshold value, and outputting the cooling liquid of the alkali liquor heat exchanger to the cooling tower.
According to one embodiment of the utility model, a liquid level meter is arranged in the liquid storage tank and is used for collecting the liquid level height of the cooling liquid in the liquid storage tank.
According to one embodiment of the utility model, the controller is electrically connected with the liquid level meter, and is used for outputting a control signal for indicating and controlling the stop of the water electrolysis hydrogen production device under the condition that the liquid level height is determined to be larger than a second target threshold value.
According to one embodiment of the utility model, the controller is further configured to output a control signal indicating to control the water electrolysis hydrogen plant to shut down if the PH is determined to be greater than the first target threshold for a target duration.
According to one embodiment of the utility model, the target time period is determined based on the volume of the reservoir and the flow rate of the cooling liquid.
In a second aspect, the present utility model provides an electrolyzed water hydrogen production system comprising:
a hydrogen production device by water electrolysis;
the alkali liquor heat exchanger, the alkali liquor inlet of alkali liquor heat exchanger with the alkali liquor outlet connection of electrolysis water hydrogen plant, the alkali liquor heat exchanger is used for carrying out cooling heat transfer to the alkali liquor of electrolysis water hydrogen plant, the alkali liquor heat exchanger is equipped with the coolant circulation system of alkali liquor heat exchanger as above.
According to the electrolytic water hydrogen production system, the PH meter is arranged at the outlet of the alkali liquor heat exchanger, the first valve of the circulation system is controlled according to the PH measured value of the PH meter, and the cooling liquid with the PH value exceeding the first target threshold value is discharged to the liquid storage tank, so that pollution to the cooling liquid circulation system caused by alkali liquor leakage is effectively prevented, and the operation safety of the electrolytic water hydrogen production system is improved.
According to one embodiment of the present utility model, the apparatus for producing hydrogen by electrolyzing water includes:
the electrolytic tank is used for producing hydrogen by electrolyzing water;
the gas-liquid separator is connected with the electrolytic tank and is used for separating alkali liquor in the gas-liquid mixture output by the electrolytic tank, and the liquid outlet of the gas-liquid separator is an alkali liquor outlet of the electrolytic water hydrogen production device.
According to one embodiment of the utility model, it comprises: the alkali liquor circulating pump is arranged between the alkali liquor inlet of the electrolytic tank and the liquid outlet of the alkali liquor heat exchanger and is used for driving the alkali liquor to circulate and flow between the electrolytic tank and the alkali liquor heat exchanger.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of a water electrolysis hydrogen production system according to an embodiment of the present utility model.
Reference numerals: the device comprises an electrolytic tank 1, a hydrogen separator 2, an oxygen separator 3, an alkali liquor heat exchanger 4, a PH meter 5, a first valve 6, a second valve 7, a liquid storage tank 8, a controller 9, a cooling tower 10, a cooling liquid circulating pump 11 and an alkali liquor circulating pump 12.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
A coolant circulation system of an alkaline liquor heat exchanger and a water electrolysis hydrogen production system according to an embodiment of the present utility model will be described with reference to fig. 1.
In the embodiment of the utility model, the alkali liquor heat exchanger 4 is used for cooling and exchanging heat of alkali liquor generated by an electrolytic water hydrogen production device in the electrolytic water hydrogen production system.
As shown in fig. 1, the cooling liquid circulation system of the lye heat exchanger 4 comprises: a PH meter 5, a liquid storage tank 8, a first valve 6 and a controller 9.
The PH meter 5 is arranged at the cooling liquid outlet of the alkali liquid heat exchanger 4, and the PH meter 5 is used for collecting the PH value of the cooling liquid outlet.
In this embodiment, the PH meter 5 is provided at the outlet of the coolant, so that the PH of the coolant can be obtained in time, and the PH of the coolant increases when the coolant is contaminated with the alkali solution.
The liquid inlet of the liquid storage tank 8 is connected with the cooling liquid outlet, and the first valve 6 is arranged between the liquid inlet of the liquid storage tank 8 and the cooling liquid outlet.
In this embodiment, the liquid storage tank 8 is used to store the cooling liquid contaminated with the alkali liquid, thereby preventing the cooling liquid contaminated with the alkali liquid from contaminating the cooling liquid circulation system.
In actual implementation, the controller 9 is electrically connected with the PH meter 5 and the first valve 6, and the controller 9 is configured to control the first valve 6 to open and output the cooling liquid of the lye heat exchanger 4 to the liquid storage tank 8 for storage when determining that the PH value is greater than or equal to the first target threshold value.
The first valve 6 may be a pneumatic ball valve, which has high execution speed, and can be opened and closed rapidly in the high-flow electrolytic water hydrogen production process flow, so as to avoid contaminated cooling liquid not being discharged into the liquid storage tank 8.
In this embodiment, the first target threshold may be a preset upper limit value of the PH value of the coolant, for determining whether the coolant is contaminated with lye.
For example, the first target threshold may be 7.5.
In this embodiment, the controller 9 is electrically connected to the PH meter 5, the controller 9 may obtain PH information collected by the PH meter 5, and the controller 9 may determine whether the coolant is contaminated by the alkali solution according to the PH value and the first target threshold.
For example, when the PH value collected by the PH meter 5 is 7.6, the controller 9 determines that the cooling liquid is contaminated by the alkali solution, controls the first valve 6 to open, and outputs the cooling liquid contaminated by the alkali solution to the liquid storage tank 8.
For another example, when the PH value collected by the PH meter 5 is 7.3, the controller 9 judges that the coolant is not polluted by the alkali liquor, the coolant circulation system works normally, the coolant circulates normally in the coolant circulation system, and the alkali liquor of the electrolytic water is cooled and exchanges heat.
In this embodiment, by controlling the first valve 6 to open in the case where it is determined that the cooling liquid is contaminated with the alkali liquid, the cooling contaminated with the alkali liquid is outputted to the liquid storage tank 8 for storage, and the leaked alkali liquid can be prevented from contaminating the cooling liquid circulation system.
It will be appreciated that the coolant flowing out of the coolant outlet may be uncontaminated coolant or coolant contaminated by alkali liquor, and the uncontaminated coolant after flowing out of the coolant outlet may enter the coolant circulation system to normally work, cool the alkali liquor of the electrolytic water, and the coolant contaminated by alkali liquor flows into the liquid storage tank 8.
In the related art, aiming at the problem of material leakage in a heat exchanger, a pressure sensor is generally used for detecting the pressure change, but in the process of producing hydrogen by using electrolyzed water, a fixed tube-plate heat exchanger is adopted in a cooler, and as capillary cracks at the welded joint of a tube plate and a heat exchange tube in the fixed tube-plate heat exchanger are small, the pressure difference change is not obvious in a short time, and the problem that the material enters a circulating cooling liquid system is difficult to detect through the pressure sensor, so that the circulating cooling liquid system is polluted by the material, and the operation safety risk exists.
In the embodiment of the utility model, the PH value of the cooling liquid flowing out of the alkali liquid heat exchanger 4 is detected by arranging the PH meter 5 at the outlet of the alkali liquid heat exchanger 4, the first valve 6 and the liquid storage tank 8 are arranged, the controller 9 controls the opening and closing of the first valve 6 based on the PH measured value of the PH meter 5, and the cooling liquid with the PH value exceeding the first target threshold value is discharged into the liquid storage tank 8, so that the pollution of alkali liquid leakage to a cooling liquid circulation system can be avoided, the running safety of the system is effectively improved, and the running cost of the system is reduced.
According to the cooling liquid circulation system of the alkali liquid heat exchanger 4 provided by the embodiment of the utility model, the PH meter 5 is arranged at the outlet of the alkali liquid heat exchanger 4, the first valve 6 of the circulation system is controlled according to the PH measured value of the PH meter 5, and the cooling liquid with the PH value exceeding the first target threshold value is discharged to the liquid storage tank 8, so that the pollution of the cooling liquid circulation system caused by alkali liquid leakage is effectively prevented, and the operation safety of the cooling liquid circulation system is improved.
In some embodiments, the cooling liquid circulation system further comprises a cooling tower 10, the liquid inlet of the cooling tower 10 is connected with the cooling liquid outlet, the liquid outlet of the cooling tower 10 is connected with the cooling liquid inlet of the lye heat exchanger 4, and the cooling tower 10 is used for cooling the cooling liquid.
The cooling tower 10 is a device for absorbing heat from the system and discharging the heat to the atmosphere to reduce the water temperature by using water as a circulating coolant.
It will be appreciated that the temperature of the cooling liquid will rise after the cooling liquid has exchanged heat with the lye in the lye heat exchanger 4.
In this embodiment, when the PH value corresponding to the cooling liquid does not exceed the set value, the cooling liquid enters the cooling tower 10 through the cooling liquid circulation loop, water is used as a cooling agent in the cooling tower 10, and after the water is in flowing contact with air, cold and heat exchange is performed to generate steam, and the steam volatilizes to take away heat to reach the principles of evaporation heat dissipation, convection heat transfer, radiation heat transfer and the like to dissipate the heat of the cooling liquid, so that the cooling liquid can be ensured to reenter the alkali liquor heat exchanger 4 to perform cooling heat exchange on the alkali liquor.
Through setting up cooling tower 10, can cool down the coolant liquid under the high temperature fast to can the efficient cyclic utilization of effectual assurance coolant liquid, improve the cyclic utilization rate of coolant liquid.
In some embodiments, the cooling liquid circulation system further comprises a second valve 7, the second valve 7 is arranged between the liquid inlet and the cooling liquid outlet of the cooling tower 10, the second valve 7 is electrically connected with the controller 9, and the controller 9 is used for controlling the first valve 6 to be closed and controlling the second valve 7 to be opened to output the cooling liquid of the lye heat exchanger 4 to the cooling tower 10 under the condition that the PH value is determined to be smaller than the first target threshold value.
The second valve 7 may also be a pneumatic ball valve, and the second valve 7 is used for controlling whether the cooling liquid flows into the cooling tower 10.
In this embodiment, when the controller 9 determines that the coolant is not contaminated, the second valve 7 may be opened to control the coolant to flow into the cooling tower 10.
In actual execution, the pneumatic ball valve is high in execution speed, and quick reaction can be guaranteed in the high-flow electrolytic water hydrogen production process flow, so that the first valve 6 can be matched effectively, uncontaminated cooling liquid can be conveyed into the cooling tower 10, and smooth operation of a cooling liquid circulation system is guaranteed.
In this embodiment, it will be appreciated that in the case where the PH value of the cooling liquid is lower than the first target threshold value, the cooling liquid is not contaminated by the alkali solution, the first valve 6 connected to the liquid storage tank 8 is closed, the uncontaminated cooling liquid is prevented from being discharged to the liquid storage tank 8, the second valve 7 is opened, and the uncontaminated cooling liquid is transferred into the cooling tower 10 for the next circulation.
In some embodiments, the cooling liquid circulation system further comprises a cooling liquid circulation pump 11, wherein the cooling liquid circulation pump 11 is arranged between the cooling liquid inlet of the lye heat exchanger 4 and the liquid outlet of the cooling tower 10, and the cooling liquid circulation pump 11 is used for driving the cooling liquid to circulate between the cooling tower 10 and the lye heat exchanger 4.
The coolant circulation pump 11 is a device for overcoming the pressure drop of the coolant circulation system, and the coolant cooled in the cooling tower 10 can be recirculated to the lye heat exchanger 4 by the coolant circulation pump 11 for cooling and heat exchanging of the lye.
In this embodiment, the cooling liquid circulating pump 11 is arranged between the cooling liquid inlet of the lye heat exchanger 4 and the liquid outlet of the cooling tower 10, the cooling liquid inlet of the cooling liquid circulating pump 11 is connected with the cooling liquid outlet of the cooling tower 10, the cooling liquid cooled in the cooling tower 10 is transmitted into the cooling liquid circulating pump 11, the cooling liquid circulating pump 11 can overcome the pressure drop of the cooling liquid circulating system, and the cooling liquid is re-input into the lye heat exchanger 4 as a cooling agent for cooling and heat exchanging of lye.
It will be appreciated that in a circulation system where the pressure drop does not need to be overcome, the provision of the coolant circulation pump 11 may be omitted, and the cost of the circulation system may be reduced.
In some embodiments, a level gauge is provided in the liquid storage tank 8 for collecting the level of the cooling liquid in the liquid storage tank 8.
For example, the level gauge may be a float gauge, a fiber optic gauge, a tracking gauge, a pressure gauge, or an acoustic gauge.
In this embodiment, a level gauge is used to monitor the level of contaminated coolant in the reservoir 8, preventing spillage of contaminated coolant in the reservoir 8.
In some embodiments, the controller 9 is electrically connected to the liquid level gauge, and the controller 9 is configured to output a control signal for instructing to control the water electrolysis hydrogen plant to stop if it is determined that the liquid level height is greater than the second target threshold.
The second target threshold may be an upper limit value of the liquid level of the liquid storage tank 8, which is set in advance, for example, the second target threshold may be a height corresponding to 70% of the volume of the liquid storage tank 8.
In actual implementation, when the height of the liquid storage tank 8 reached by the polluted alkali liquid in the liquid storage tank 8 exceeds the second target threshold, the situation that the alkali liquid leakage of the cooling liquid circulation system is serious is indicated, the controller 9 can output a control signal to control the stop of the water electrolysis hydrogen production device, and an operator can detach and overhaul the alkali liquid heat exchanger 4 after the stop of the water electrolysis hydrogen production device for a period of time.
In this embodiment, setting the second target threshold value allows to find out a severe leakage of the lye heat exchanger 4 in advance, reducing further losses of cooling liquid.
In some embodiments, the controller 9 is further configured to output a control signal for instructing to control the water electrolysis hydrogen plant to shut down if the PH is determined to be greater than the first target threshold for the target duration.
The target duration may be an upper limit value that is set in advance and that the PH meter 5 continuously detects that the coolant exceeds the first target threshold value.
For example, the target duration may be 30 seconds, when the controller 9 detects that the PH value corresponding to the cooling liquid flowing out of the lye heat exchanger 4 is greater than the first target threshold value and exceeds 30 seconds, it may be determined that a serious leakage condition has occurred in the pipeline of the lye heat exchanger 4, at this time, the controller 9 outputs a control signal to control the water electrolysis hydrogen production device to stop, and after the water electrolysis hydrogen production device is stopped for a period of time, an operator disassembles and overhauls the lye heat exchanger 4.
By setting the target time length, the leakage problem of the lye heat exchanger 4 can be found before the liquid level of the cooling liquid in the liquid storage tank 8 reaches the second target threshold value, so that more cooling liquid can be prevented from being polluted, the defect problem of the cooling liquid circulation system can be found in advance, and the maintenance can be carried out as soon as possible.
In some embodiments, the target time period is determined based on the volume of the reservoir 8 and the flow rate of the coolant.
It will be appreciated that the flow rate of the coolant in the coolant system and the volume of the reservoir 8 are different in different situations, as are the corresponding target durations.
In actual execution, the faster the flow rate of the coolant, the smaller the volume of the reservoir 8, the shorter the target period, the slower the flow rate of the coolant, the larger the volume of the reservoir 8, and the longer the target period.
The embodiment of the utility model also provides a system for producing hydrogen by electrolyzing water.
As shown in fig. 1, the water electrolysis hydrogen production system includes: an electrolytic water hydrogen production device and an alkali liquor heat exchanger 4.
The alkali liquor inlet of the alkali liquor heat exchanger 4 is connected with the alkali liquor outlet of the electrolytic water hydrogen production device, the alkali liquor heat exchanger 4 is used for cooling and exchanging heat of alkali liquor of the electrolytic water hydrogen production device, and the alkali liquor heat exchanger 4 is provided with the cooling liquid circulation system of the alkali liquor heat exchanger 4.
It can be understood that the alkali liquor is used as a medium in the water electrolysis hydrogen production device, and the alkali liquor is heated to a higher temperature due to a large amount of heat generated in the water electrolysis hydrogen production process, and the alkali liquor with high temperature can be used as the medium for water electrolysis hydrogen production after being cooled.
In the embodiment, an alkali liquor outlet of the electrolytic water hydrogen production device is connected with an alkali liquor inlet of an alkali liquor heat exchanger 4, the alkali liquor heat exchanger 4 can receive high-temperature alkali liquor in the electrolytic water hydrogen production device, cooling liquid is used for cooling and exchanging heat of the alkali liquor, and the temperature of the alkali liquor is reduced, so that the alkali liquor reenters the electrolytic water hydrogen production device for electrolytic water hydrogen production.
According to the electrolytic water hydrogen production system provided by the embodiment of the utility model, the PH meter 5 is arranged at the outlet of the alkali liquor heat exchanger 4, the first valve 6 of the circulation system is controlled according to the PH measured value of the PH meter 5, and the cooling liquid with the PH value exceeding the first target threshold value is discharged to the liquid storage tank 8, so that the pollution of the cooling liquid circulation system caused by alkali liquor leakage is effectively prevented, and the operation safety of the electrolytic water hydrogen production system is improved.
In some embodiments, an apparatus for producing hydrogen by electrolysis of water includes: an electrolytic tank 1 and a gas-liquid separator.
The electrolytic tank 1 is used for producing hydrogen by electrolyzing water, the gas-liquid separator is connected with the electrolytic tank 1 and is used for separating alkali liquor in a gas-liquid mixture output by the electrolytic tank 1, and a liquid outlet of the gas-liquid separator is an alkali liquor outlet of the water electrolysis hydrogen production device.
It will be appreciated that since a large amount of heat is generated in the electrolysis of water to produce hydrogen, the medium lye in the electrolyzer 1 will become alkali mist at high temperature and mix with the hydrogen and oxygen.
In this embodiment, the gas-liquid separator may include an oxygen separator 3 and a hydrogen separator 2, and the electrolysis of water in the electrolyzer 1 may produce a gas-liquid mixture of hydrogen and a gas-liquid mixture of oxygen, and the gas-liquid mixture of hydrogen may be directed into the hydrogen separator 2, and the gas-liquid mixture of oxygen may be directed into the oxygen separator 3.
The alkali liquor outlets of the hydrogen separator 2 and the oxygen separator 3 are connected with an alkali liquor heat exchanger 4, the hydrogen separator 2 and the oxygen separator 3 convert alkali fog in a gas-liquid mixture of hydrogen and a gas-liquid mixture of oxygen into alkali liquor, and the alkali liquor is input into the alkali liquor heat exchanger 4 for cooling.
Hydrogen and oxygen containing no alkali mist can be obtained by the hydrogen separator 2 and the oxygen separator 3.
In some embodiments, the electrolytic water hydrogen production system further comprises an alkali liquor circulating pump 12, wherein the alkali liquor circulating pump 12 is arranged between the alkali liquor inlet of the electrolytic tank 1 and the liquid outlet of the alkali liquor heat exchanger 4, and the alkali liquor circulating pump 12 is used for driving alkali liquor to circulate between the electrolytic tank 1 and the alkali liquor heat exchanger 4.
Wherein, the alkali liquor circulating pump 12 is a device for overcoming the pressure drop in the electrolytic water hydrogen production system, and the cooled alkali liquor can be recirculated to the electrolytic tank 1 through the alkali liquor circulating pump 12 for producing hydrogen by water electrolysis.
In this embodiment, the alkali liquor circulation pump 12 is disposed between the alkali liquor inlet of the electrolyzer 1 and the liquid outlet of the alkali liquor heat exchanger 4, the alkali liquor inlet of the alkali liquor circulation pump 12 is connected with the alkali liquor outlet of the alkali liquor heat exchanger 4, the alkali liquor cooled in the alkali liquor heat exchanger 4 is transferred into the alkali liquor circulation pump 12, the alkali liquor circulation pump 12 can overcome the pressure drop of the electrolytic water hydrogen production system, and the alkali liquor is re-input into the electrolyzer 1 as a medium to produce electrolytic water hydrogen.
It will be appreciated that in a circulation system where the pressure drop does not need to be overcome, the provision of the lye circulation pump 12 can be omitted, and the cost of the circulation system can be reduced.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present utility model may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "left", "right", "inner", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the utility model, a "first feature" or "second feature" may include one or more of such features.
In the description of the present utility model, "plurality" means two or more.
In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.
In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. The utility model provides a coolant liquid circulation system of alkali lye heat exchanger, its characterized in that, alkali lye heat exchanger is used for carrying out cooling heat transfer to the alkali lye of electrolysis water hydrogen plant, coolant liquid circulation system includes:
the PH meter is arranged at the cooling liquid outlet of the alkali liquid heat exchanger and is used for collecting the PH value of the cooling liquid outlet;
the liquid inlet of the liquid storage tank is connected with the cooling liquid outlet;
the first valve is arranged between the liquid inlet of the liquid storage tank and the cooling liquid outlet;
and the controller is electrically connected with the PH meter and the first valve, and is used for controlling the first valve to be opened and outputting the cooling liquid of the alkali liquid heat exchanger to the liquid storage tank for storage under the condition that the PH value is determined to be greater than or equal to a first target threshold value.
2. The coolant circulation system of an alkaline liquor heat exchanger according to claim 1, further comprising:
the liquid inlet of the cooling tower is connected with the cooling liquid outlet, the liquid outlet of the cooling tower is connected with the cooling liquid inlet of the alkali liquor heat exchanger, and the cooling tower is used for cooling the cooling liquid.
3. The coolant circulation system of an alkaline liquor heat exchanger according to claim 2, further comprising:
the second valve is arranged between the liquid inlet of the cooling tower and the cooling liquid outlet, the second valve is electrically connected with the controller, and the controller is used for controlling the first valve to be closed and controlling the second valve to be opened under the condition that the PH value is determined to be smaller than the first target threshold value, and outputting the cooling liquid of the alkali liquor heat exchanger to the cooling tower.
4. The coolant circulation system of an alkaline liquor heat exchanger according to claim 2, further comprising:
the cooling liquid circulating pump is arranged between the cooling liquid inlet of the alkali liquid heat exchanger and the liquid outlet of the cooling tower and is used for driving the cooling liquid to circularly flow between the cooling tower and the alkali liquid heat exchanger.
5. The cooling liquid circulation system of the alkali liquor heat exchanger according to claim 1, wherein a liquid level meter is arranged in the liquid storage tank and is used for collecting the liquid level height of the cooling liquid in the liquid storage tank.
6. The cooling liquid circulation system of the lye heat exchanger according to claim 5, wherein the controller is electrically connected with the liquid level meter, and is used for outputting a control signal for indicating and controlling the stop of the water electrolysis hydrogen production device under the condition that the liquid level height is determined to be larger than a second target threshold value.
7. The coolant circulation system of the lye heat exchanger according to any one of claims 1 to 6, wherein the controller is further configured to output a control signal indicating to control the water electrolysis hydrogen plant to shut down if the PH is determined to be greater than the first target threshold value for a target period of time.
8. The chilled liquid circulation system of a lye heat exchanger according to claim 7, wherein the target time period is determined based on a volume of the liquid storage tank and a flow rate of the chilled liquid.
9. A system for producing hydrogen by electrolysis of water, comprising:
a hydrogen production device by water electrolysis;
an alkali liquor heat exchanger, an alkali liquor inlet of the alkali liquor heat exchanger is connected with an alkali liquor outlet of the electrolytic water hydrogen production device, the alkali liquor heat exchanger is used for cooling and heat exchanging alkali liquor of the electrolytic water hydrogen production device, and the alkali liquor heat exchanger is provided with a cooling liquid circulation system of the alkali liquor heat exchanger according to any one of claims 1-7.
10. The water electrolysis hydrogen production system of claim 9, wherein the water electrolysis hydrogen production apparatus comprises:
the electrolytic tank is used for producing hydrogen by electrolyzing water;
the gas-liquid separator is connected with the electrolytic tank and is used for separating alkali liquor in the gas-liquid mixture output by the electrolytic tank, and the liquid outlet of the gas-liquid separator is an alkali liquor outlet of the electrolytic water hydrogen production device.
11. The water electrolysis hydrogen production system of claim 10, comprising:
the alkali liquor circulating pump is arranged between the alkali liquor inlet of the electrolytic tank and the liquid outlet of the alkali liquor heat exchanger and is used for driving the alkali liquor to circulate and flow between the electrolytic tank and the alkali liquor heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321282486.3U CN219653147U (en) | 2023-05-22 | 2023-05-22 | Cooling liquid circulation system of alkali liquor heat exchanger and electrolytic water hydrogen production system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321282486.3U CN219653147U (en) | 2023-05-22 | 2023-05-22 | Cooling liquid circulation system of alkali liquor heat exchanger and electrolytic water hydrogen production system |
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