CN116497400B - System and method for recovering waste heat of drying tower and for insulating and heating electrolyte - Google Patents
System and method for recovering waste heat of drying tower and for insulating and heating electrolyte Download PDFInfo
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- CN116497400B CN116497400B CN202310790864.7A CN202310790864A CN116497400B CN 116497400 B CN116497400 B CN 116497400B CN 202310790864 A CN202310790864 A CN 202310790864A CN 116497400 B CN116497400 B CN 116497400B
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 103
- 238000001035 drying Methods 0.000 title claims abstract description 72
- 238000010438 heat treatment Methods 0.000 title claims abstract description 46
- 239000002918 waste heat Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 95
- 239000007788 liquid Substances 0.000 claims abstract description 83
- 238000000926 separation method Methods 0.000 claims abstract description 60
- 238000005338 heat storage Methods 0.000 claims abstract description 49
- 230000017525 heat dissipation Effects 0.000 claims abstract description 27
- 238000004321 preservation Methods 0.000 claims abstract description 26
- 238000011084 recovery Methods 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 5
- 239000004793 Polystyrene Substances 0.000 claims description 4
- 229920002223 polystyrene Polymers 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims 8
- 239000008151 electrolyte solution Substances 0.000 claims 1
- 238000003860 storage Methods 0.000 description 16
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 11
- 239000001257 hydrogen Substances 0.000 description 11
- 229910052739 hydrogen Inorganic materials 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000013589 supplement Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005868 electrolysis reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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
- C25B15/021—Process control or regulation of heating or cooling
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
- C25B15/085—Removing impurities
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
- C25B15/087—Recycling of electrolyte to electrochemical cell
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Automation & Control Theory (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Inorganic Chemistry (AREA)
- Secondary Cells (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The application relates to a system and a method for recovering waste heat of a drying tower and heating electrolyte in a heat preservation way, which are used for collecting heat of the drying tower to heat the electrolyte in a gas-liquid separation part, and comprise the following steps: the heat collecting component is sleeved outside the drying tower and provided with a first volume monitoring component; a heat storage device connected to the heat collecting means through a first circulation pipe; the heat dissipation part is arranged in the gas-liquid separation part, is connected with the heat storage device through a second circulating pipeline, is connected with the heat collection part through a third circulating pipeline, and is internally provided with a first temperature monitoring part; the heat exchange medium replenishing component is connected with the third circulating pipeline through a fourth circulating pipeline; the controller is used for respectively controlling the on-off of the first circulating pipeline, the second circulating pipeline and the third circulating pipeline based on the information fed back by the first temperature monitoring component; based on the information fed back by the first volume monitoring component, the on-off of the third circulating pipeline and the fourth circulating pipeline are respectively controlled.
Description
Technical Field
The application relates to the technical field of alkaline water hydrogen production, in particular to a system and a method for recovering waste heat of a drying tower and for insulating and heating electrolyte.
Background
In an alkaline water electrolysis hydrogen production plant, a drying tower is used for removing moisture in hydrogen. During this process, the drying tower drum generates a great deal of waste heat. In the prior art, this waste heat is often not utilized effectively. The alkaline water electrolysis hydrogen production equipment (an electrolytic tank) needs a certain time to heat alkaline liquid after stopping so that the alkaline liquid reaches the operating temperature when being restarted, the electrolyte is heated to the normal temperature usually for 8 hours, and the current electrolyte heating mode is electric heating, so that time is wasted and the cost is high.
Disclosure of Invention
The application provides a system for recovering waste heat of a drying tower and heating electrolyte in a heat preservation way, which is used for recovering the waste heat of the drying tower to heat the electrolyte in a gas-liquid separation part, and the electrolyte between the gas-liquid separation part and an electrolytic tank flows, so that the temperature of the electrolyte in the electrolytic tank is maintained in a shutdown state of the electrolytic tank, the time for heating the electrolyte in the electrolytic tank when the electrolytic tank is restarted is shortened, the cost is saved, the energy is saved, and the emission is reduced.
In view of this, the present application proposes a system for waste heat recovery of a drying tower and for heat preservation and heating of an electrolyte for collecting heat of the drying tower to heat the electrolyte inside a gas-liquid separation part communicating with an electrolytic tank, characterized by comprising: the heat collecting component is sleeved outside the drying tower and provided with a first volume monitoring component; a heat storage device connected to the heat collecting means through a first circulation pipe; the heat dissipation part is arranged inside the gas-liquid separation part, is connected with the heat storage device through a second circulating pipeline and is connected with the heat collection part through a third circulating pipeline, and the gas-liquid separation part is provided with a first temperature monitoring part; the heat exchange medium replenishing component is connected with the third circulating pipeline through a fourth circulating pipeline; the controller is used for respectively controlling the on-off of the first circulating pipeline, the second circulating pipeline and the third circulating pipeline based on the information fed back by the first temperature monitoring component; and on the basis of the information fed back by the first volume monitoring component, respectively controlling the on-off of the third circulating pipeline and the fourth circulating pipeline.
In some alternative embodiments, the first circulation pipe is provided with a first on-off switch; the second circulation pipeline is provided with a second on-off switch, and the third circulation pipeline is provided with a third on-off switch and a fourth on-off switch; the position of the fourth circulating pipeline communicated with the third circulating pipeline is positioned between the third on-off switch and the fourth on-off switch, and the fourth circulating pipeline is provided with a fifth on-off switch; the controller is respectively in communication connection with the first volume monitoring component, the first temperature monitoring component, the first start-stop switch, the second start-stop switch, the third start-stop switch and the fourth start-stop switch, controls the first start-stop switch, the second start-stop switch, the third start-stop switch and the fourth start-stop switch to be closed or opened based on information fed back by the first volume monitoring component, and controls the fifth start-stop switch and the third start-stop switch to be closed or opened based on temperature information fed back by the first temperature monitoring component.
In some alternative embodiments, a first power component is also included, the first power component being coupled to the first circulation conduit.
In some alternative embodiments, a second power component is also included, the second power component being coupled to the second circulation conduit.
In some alternative embodiments, a third power component is also included, the third power component being coupled to the third circulation conduit.
In some alternative embodiments, the first power component, the second power component, and the third power component are each heat exchange pumps.
In some alternative embodiments, the heat collecting member is a heat exchanger, and the wall of the heat exchanger contacting the inner cylinder is made of a heat conducting material.
In some alternative embodiments, the drying tower further comprises a second temperature monitoring component in communication with the controller.
In some alternative embodiments, the first temperature monitoring component and the second temperature monitoring component are temperature sensors.
In some alternative embodiments, the first volume monitoring component is a liquid level monitoring component that communicates with the heat collection component.
In some alternative embodiments, the first circulation conduit is provided with a pneumatic ball valve in a region between the heat collecting member and the first power member.
In some alternative embodiments, the first on-off switch is a solenoid valve.
In some alternative embodiments, the second on-off switch is a solenoid valve.
In some alternative embodiments, the thermal storage device comprises a tank, a liner, and an insulating layer, wherein the liner is disposed inside the tank, and the insulating layer is disposed outside the tank.
In some alternative embodiments, the thermal storage device is provided with a pressure monitoring component, the pressure monitoring component being provided to the liner.
In some alternative embodiments, the thermal storage device further comprises a third temperature monitoring component disposed on the tank.
In some alternative embodiments, the third temperature monitoring component is a temperature transmitter.
In some optional embodiments, the heat-insulating layer is made of polystyrene.
On the other hand, the application provides a method for realizing the heat preservation and heating of the electrolyte, which is realized by the system for recovering the waste heat of the drying tower and for the heat preservation and heating of the electrolyte, wherein the first temperature monitoring part monitors the temperature information of the electrolyte in the gas-liquid separation part and feeds the temperature information back to the controller; the controller respectively controls the first circulation pipeline, the second circulation pipeline and the third circulation pipeline to be communicated when confirming that the temperature of the electrolyte in the gas-liquid separation part is smaller than a preset temperature value based on temperature information; the heat exchange medium in the heat collecting part sequentially passes through the first circulating pipeline, the heat storage device, the second circulating pipeline, the heat radiating part and the third circulating pipeline for heat circulation.
In some alternative embodiments, the first volume monitoring component measures the level information of the heat exchange medium in the heat collection component and feeds the level information back to the controller; the controller respectively controls the third circulation pipeline to be communicated with the fourth circulation pipeline when confirming that the liquid level in the heat collecting component is smaller than a preset liquid level value based on the liquid level information; the heat exchange medium replenishing part replenishes the heat exchange medium to the heat collecting part through the third circulation pipeline and the fourth circulation pipeline.
Compared with the prior art, the application has the following technical effects:
1. the application provides a system for recovering waste heat of a drying tower and heating electrolyte in a heat preservation way, which is used for collecting heat of the drying tower to heat the electrolyte in a gas-liquid separation part, wherein the gas-liquid separation part is communicated with an electrolytic tank, and the electrolyte in the gas-liquid separation part is heated and then circulated to the electrolyte so as to heat the electrolyte in the electrolytic tank, so that the electrolyte in the electrolytic tank is heated, the temperature of the electrolyte in the electrolytic tank is maintained in a shutdown state of the electrolytic tank, the time for heating the electrolyte in the electrolytic tank when the electrolytic tank is started up again is shortened, the cost is saved, the energy is saved, and the emission is reduced. The system for recovering waste heat of the drying tower and for insulating and heating electrolyte comprises a heat collecting component, a heat storage device, a heat radiating component, a heat exchange medium supplying component and a controller, wherein a heat exchange medium is arranged in the heat collecting component, the heat collecting component is sleeved outside the drying tower and is used for collecting heat of the drying tower, so that the heat exchange medium in the heat collecting component is heated, a first temperature monitoring component is arranged on the gas-liquid separation component and is used for monitoring the temperature of the heat exchange medium in the heat collecting component and transmitting temperature information to the controller; the heat storage device is communicated with the heat collection component through a first circulating pipeline, and when the temperature of the heat exchange medium in the heat collection component reaches a preset temperature, the heat exchange medium in the heat collection component flows into the heat storage device for storage; the heat dissipation part is arranged in the gas-liquid separation part, the heat dissipation part is connected with the heat storage device through a second circulating pipeline, the heat dissipation part is connected with the heat collection part through a third circulating pipeline, a first temperature monitoring part is arranged in the gas-liquid separation part and is used for monitoring the temperature of electrolyte in the gas-liquid separation part and transmitting the temperature of the electrolyte in the gas-liquid separation part to the controller, the controller controls the communication between the second circulating pipeline and the third circulating pipeline, a heat exchange medium in the heat storage device flows into the heat dissipation part, the heat dissipation part heats the electrolyte in the gas-liquid separation part, and the heat exchange medium enters the heat collection part again for heating after the circulation in the heat dissipation part is finished; the heat exchange medium replenishing component is connected with the third circulating pipeline through the fourth circulating pipeline, the heat exchange medium replenishing component supplements heat exchange medium to the interior of the heat collecting component through the third circulating pipeline and the fourth circulating pipeline, the controller receives information from the first volume monitoring component, and the fourth circulating pipeline is controlled to be communicated with the third circulating pipeline, so that the heat exchange medium replenishing component is used for replenishing heat exchange medium to the heat collecting component; the controller receives information from the first temperature monitoring component, controls the first circulating pipeline, the second circulating pipeline and the third circulating pipeline to be communicated, receives a communication instruction through the first circulating pipeline, the second circulating pipeline and the third circulating pipeline, and heat exchange medium in the heat collecting component sequentially passes through the first circulating pipeline, the heat storage device, the second circulating pipeline, the heat radiating component and the third circulating pipeline to realize heat circulation, so that electrolyte in the gas-liquid separation component is heated.
2. The application provides a method for recovering waste heat of a drying tower and for insulating and heating electrolyte, which comprises the following steps: the first temperature monitoring component monitors temperature information of the electrolyte in the gas-liquid separation component and feeds the temperature information back to the controller; the controller respectively controls the first circulation pipeline, the second circulation pipeline and the third circulation pipeline to be communicated when confirming that the temperature of the electrolyte in the gas-liquid separation part is smaller than a preset temperature value based on the temperature information; the heat exchange medium in the heat collecting part sequentially passes through the first circulating pipeline, the heat storage device, the second circulating pipeline, the heat radiating part and the third circulating pipeline to carry out heat circulation. Electrolyte in the gas-liquid separation part is heated by the heat dissipation part, and the electrolyte in the gas-liquid separation part can flow to the electrolytic tank, so that the electrolyte in the electrolytic tank is heated, the temperature of the electrolyte in the electrolytic tank is maintained in a stop state of the electrolytic tank, the time for heating the electrolyte in the electrolytic tank when the electrolytic tank is started up again is shortened, the cost is saved, and the energy and the emission are reduced.
Drawings
The foregoing and/or additional aspects and advantages of the application 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 shows a schematic diagram of a system for dry tower waste heat recovery and for electrolyte soak heating in accordance with an embodiment of the present application;
fig. 2 shows a schematic structural view of a drying tower according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a thermal storage device according to an embodiment of the present application;
fig. 4 shows a schematic structural diagram of a heat dissipating component according to an embodiment of the present application.
Wherein, the correspondence between the reference numerals and the component names in fig. 1 to 4 is:
1-a drying tower; 11-a first circulation line; 12-a first on-off switch; 13-a first power component; 15-a heat collection member; 16-a second temperature monitoring component; 17-a first volume monitoring component; 2-a thermal storage device; 21-a second circulation line; 22-a second on-off switch; 23-a second power component; 24-tank body; 25-an inner container; 3-a heat sink member; 4-a gas-liquid separation part; 5-an electrolytic cell; 6-a heat exchange medium replenishing component; 61-a third circulation line; 62-fourth circulation pipes; 63-a third power component; 65-a third on-off switch; 66-four on-off switches; 67-fifth on-off switch.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.
In the alkaline water electrolysis hydrogen production apparatus, a drying tower 1 is used for removing moisture in hydrogen. During this process, the drum of the drying tower 1 generates a great deal of waste heat. In the prior art, this waste heat is often not utilized effectively. The alkaline water electrolysis hydrogen production equipment (an electrolytic tank) needs a certain time to heat alkaline liquid after stopping so that the alkaline liquid reaches the operating temperature when being restarted, the electrolyte is heated to the normal temperature usually for 8 hours, and the current electrolyte heating mode is electric heating, so that time is wasted and the cost is high.
The application provides a system for recovering waste heat of a drying tower and heating electrolyte in a heat preservation way, which is used for recovering the waste heat of the drying tower 1 to heat the electrolyte in a gas-liquid separation part 4, and the electrolyte between the gas-liquid separation part 4 and an electrolytic tank 5 circulates, so that the temperature of the electrolyte in the electrolytic tank 5 in a state that the electrolytic tank 5 is stopped is maintained, the time for heating the electrolyte in the electrolytic tank 5 when the electrolytic tank 5 is started again is shortened, the cost is saved, and the energy and the emission are saved.
The application provides a system for recovering waste heat of a drying tower and heating electrolyte in a heat preservation way, which is used for collecting heat of the drying tower 1 to heat the electrolyte in a gas-liquid separation part 4, wherein the gas-liquid separation part 4 is communicated with an electrolytic tank 5, and the system for recovering waste heat of the drying tower and heating the electrolyte in the heat preservation way comprises the following components: the heat collecting component 15, the heat storage device 2, the heat radiating component 3, the heat exchange medium replenishing component 6 and the controller are sleeved outside the drying tower 1, and the gas-liquid separation component 4 is provided with a first volume monitoring component 17; the heat storage device 2 is connected to the heat collecting means 15 through the first circulation pipe 11; the heat dissipation part 3 is arranged inside the gas-liquid separation part 4, the heat dissipation part 3 is connected with the heat storage device 2 through a second circulation pipeline 21, the heat dissipation part 3 is connected with the heat collection part 15 through a third circulation pipeline 61, and the heat dissipation part 3 is provided with a first temperature monitoring part; the heat exchange medium replenishing part 6 is connected with the third circulation pipe 61 through the fourth circulation pipe 62; the controller controls the on-off of the first circulation pipe 11, the second circulation pipe 21 and the third circulation pipe 61 based on the information fed back by the first temperature monitoring part, and controls the on-off of the third circulation pipe 61 and the fourth circulation pipe 62 based on the information fed back by the first volume monitoring part 17.
Specifically, the application provides a system for recovering waste heat of a drying tower and heating electrolyte in a heat preservation way, which is used for collecting heat of the drying tower 1 to heat the electrolyte in a gas-liquid separation part 4, wherein the gas-liquid separation part 4 is communicated with an electrolytic tank 5, and the electrolyte in the gas-liquid separation part 4 is heated and then circulated to the electrolyte so as to heat the electrolyte in the electrolytic tank 5, thereby realizing the heating of the electrolyte in the electrolytic tank 5, maintaining the temperature of the electrolyte in the electrolytic tank 5 in a state that the electrolytic tank 5 is stopped, shortening the time for heating the electrolyte in the electrolytic tank 5 when the electrolytic tank 5 is restarted, saving the cost, saving the energy and reducing the emission. The system for recovering waste heat of the drying tower and heating the electrolyte in a heat preservation way comprises a heat collecting part 15, a heat storage device 2, a heat radiating part 3, a heat exchange medium supplying part 6 and a controller, wherein the heat exchange medium is arranged in the heat collecting part 15, the heat collecting part 15 is sleeved outside the drying tower 1, the heat collecting part 15 is used for collecting heat of the drying tower 1 so as to heat the heat exchange medium in the heat collecting part 15, the heat collecting part 15 is provided with a first volume monitoring part 17, and the first volume monitoring part 17 is used for monitoring the temperature of the heat exchange medium in the heat collecting part 15 and transmitting temperature information to the controller; the heat storage device 2 is communicated with the heat collecting component 15 through the first circulating pipeline 11, and when the temperature of the heat exchange medium in the heat collecting component 15 reaches a preset temperature, the heat exchange medium in the heat collecting component 15 flows into the heat storage device 2 for storage; the heat dissipation part 3 is arranged in the gas-liquid separation part 4, the heat dissipation part 3 is connected with the heat storage device 2 through the second circulation pipeline 21, the heat dissipation part 3 is connected with the heat collection part through the third circulation pipeline 61, the first temperature monitoring part is arranged in the gas-liquid separation part 4 and is used for monitoring the temperature of electrolyte in the gas-liquid separation part 4 and transmitting the temperature of the electrolyte in the gas-liquid separation part 4 to the controller, the controller controls the communication between the second circulation pipeline 21 and the third circulation pipeline 61, a heat exchange medium in the heat storage device 2 flows into the heat dissipation part 3, the heat exchange medium heats the electrolyte in the gas-liquid separation part 4 through the heat dissipation part 3, and after the circulation of the heat exchange medium in the heat dissipation part 3 is finished, the heat exchange medium reenters the heat collection part 15 for heating; the heat exchange medium replenishment part 6 is connected to the third circulation pipe 61 through the fourth circulation pipe 62, and the heat exchange medium replenishment part 6 replenishes the heat collection part 15 with the heat exchange medium through the third circulation pipe 61 and the fourth circulation pipe 62; the controller receives information from the first temperature monitoring component and controls the first circulation pipeline 11, the second circulation pipeline 21 and the third circulation pipeline 61 to be communicated, the first circulation pipeline 11, the second circulation pipeline 21 and the third circulation pipeline 61 receive communication instructions, and the heat exchange medium in the heat collecting component 15 sequentially passes through the first circulation pipeline 11, the heat storage device 2, the second circulation pipeline 21, the heat radiating component 3 and the third circulation pipeline 61 to realize thermal circulation, so that the electrolyte in the gas-liquid separation component 4 is heated. The first temperature monitoring component is a temperature sensor.
In some alternative embodiments, the first circulation duct 11 is provided with a first on-off switch 12; the second circulation pipe 21 is provided with a second on-off switch 22, and the third circulation pipe 61 is provided with a third on-off switch 65 and a fourth on-off switch 66; the communication position of the fourth circulation pipeline 62 and the third circulation pipeline 61 is between the third on-off switch 65 and the fourth on-off switch 66, and the fourth circulation pipeline 62 is provided with a fifth on-off switch 67; the controller is respectively in communication connection with the first volume monitoring component 17, the first temperature monitoring component, the first on-off switch 12, the second on-off switch 22, the third on-off switch 65 and the fourth on-off switch 66, and controls the on-off of the first on-off switch 12, the second on-off switch 22, the third on-off switch 65 and the fourth on-off switch 66 respectively based on the information fed back by the first temperature monitoring component, and controls the on-off of the fifth on-off switch 67 and the third on-off switch 65 based on the temperature information fed back by the first volume monitoring component 17.
Specifically, the first temperature monitoring component monitors the temperature in the gas-liquid separation component 4 in real time, and transmits temperature information to the controller, when the controller detects that the temperature of the electrolyte in the gas-liquid separation component 4 is smaller than a preset range, a closing instruction is sent to the first opening-closing switch 12, the second opening-closing switch 22, the third opening-closing switch 65 and the fourth opening-closing switch 66, and the first circulation pipeline 11, the second circulation pipeline 21, the third circulation pipeline 61 and the fourth circulation pipeline 62 realize circulation, so that the circulation of a heat exchange medium in the heat dissipation component 3 is realized, and the heat dissipation component 3 heats the electrolyte in the gas-liquid separation component 4. The first volume monitoring part 17 monitors the volume of the heat exchange medium in the heat collecting part 15 in real time, and when the volume in the heat collecting part 15 is smaller than the preset range, the fifth on-off switch 67 and the third on-off switch 65 are turned on to operate, and the heat exchange medium replenishing part 6 is used for conveying the heat exchange medium to the heat collecting part 15. The circulation of the heat exchange medium, the heat exchange medium circulates to the heat dissipation part 3, the heat dissipation part 3 heats the electrolyte in the gas-liquid separation part 4, and the electrolyte in the gas-liquid separation part 4 can circulate to the electrolytic tank 5, so that the temperature of the electrolyte in the electrolytic tank 5 under the condition that the electrolytic tank 5 is stopped is maintained by heating the electrolyte in the electrolytic tank 5, the time for heating the electrolyte in the electrolytic tank 5 when the electrolytic tank 5 is started again is shortened, the cost is saved, the energy is saved, and the emission is reduced.
Further, the system may include a plurality of drying towers 1, the drying towers 1 are used for drying the hydrogen to remove the moisture, heating is switched every 8 hours, a large amount of heat energy is released in the process of drying the hydrogen and the oxygen by the drying towers 1, and the heat collecting part 15 is used for recovering the heat of the drying towers 1. The heat collecting means 15 further comprises a second temperature monitoring means 16, the second temperature monitoring means 16 being adapted to monitor whether the two drying towers 1 are in a heated or unheated state and to transfer the operating state of the drying towers 1 to the controller. The gas-liquid separation part 4 is provided with a first temperature monitoring part, the first temperature monitoring part is used for monitoring whether the electrolyte in the two gas-liquid separation parts 4 accords with a preset temperature range or not, the temperature of the electrolyte in the gas-liquid separation part 4 is transmitted to a controller, the controller makes a decision, and the controller issues instructions to the first on-off switch 12, the second on-off switch 22, the third on-off switch 65 and the fourth on-off switch 66 to control whether the first on-off switch 12, the second on-off switch 22, the third on-off switch 65 and the fourth on-off switch 66 can be started to work or not. The ends of the third circulation pipeline 61 and the fourth circulation pipeline 62 are connected together, the end of the fourth circulation pipeline 62 is provided with a heat exchange medium supply part 6, a third power part 63 and a fifth on-off switch 67 are arranged at the position close to the heat exchange medium supply part 6, when the fifth on-off switch 67 is closed, the first on-off switch 12, the second on-off switch 22, the third on-off switch 65 and the fourth on-off switch 66 are opened, and the heat exchange medium in the heat dissipation part 3 can enter the drying tower 1 through the third circulation pipeline 61 to be reheated, so that the circulation of the heat exchange medium is realized. The fifth on-off switch 67 and the third on-off switch 65 are turned on, and the first on-off switch 12, the second on-off switch 22 and the fourth on-off switch 66 are turned off, so that the heat exchange medium replenishing part 6 is capable of replenishing the heat exchange medium to the heat collecting part 15.
Further, the heat storage device 2 is configured to store recovered waste heat, when the heat collecting component 15 heats the heat exchange medium to a preset temperature, the first on-off switch 12 is turned on, the heat exchange medium heated to the preset temperature in the heat collecting component 15 is circulated to the heat storage device 2, the heat exchange medium is kept warm by the heat storage device 2, and when the electrolyte in the gas-liquid separation component 4 is less than the preset temperature, the second on-off switch 22 is turned on, and the heat exchange medium in the heat storage device 2 is conveyed to the heat dissipation component 3, so that the electrolyte in the gas-liquid separation component 4 is heated.
In some alternative embodiments, a first power component 13 is further included, the first power component 13 being connected to the first circulation duct 11.
Specifically, a heating wire is arranged in the drying tower 1, the second temperature monitoring component 16 monitors whether the heat exchange medium in the heat collecting component 15 reaches a storage temperature, the storage temperature is temporarily set to be 85 ℃ of the running temperature of the heat exchange medium, the running of the first power component 13 is controlled, the first on-off switch 12 is turned on, and the heat exchange medium is conveyed into the heat storage device 2 for storage. The first volume monitoring part 17 monitors the liquid level of the heat exchange medium in the heat collecting part 15, starts the third power part 63 and starts the fifth on-off switch 67 to supplement the heat exchange medium in the heat exchange medium supplementing part 6 into the heat collecting part 15.
In some alternative embodiments, a second power component 23 is also included, the second power component 23 being connected to the second circulation duct 21.
Specifically, the first temperature monitoring component is configured to monitor the temperature of the electrolyte in the gas-liquid separation component 4, and transmit the temperature of the electrolyte in the gas-liquid separation component 4 to the controller in real time, the controller confirms that the temperature of the electrolytic tank 5 is less than a minimum preset value in a preset temperature range, and opens the first on-off switch 12 and the second on-off switch 22, and opens the first power component 13 and the second power component 23, so that the heat collecting component 15 conveys the heat exchange medium heated to the preset temperature to the heat storage device 2 for heat preservation, and the heat exchange medium in the heat storage device 2 is conveyed to the heat dissipation component 3, thereby realizing heating of the electrolyte in the gas-liquid separation component 4.
In some alternative embodiments, a third power component 63 is also included, the third power component 63 being connected to the fourth circulation duct 62.
Specifically, the first volume monitoring part 17 monitors the liquid level of the heat exchange medium in the heat collecting part 15, controls the fifth on-off switch 67 and the third on-off switch 65 to operate, and supplements the heat exchange medium in the heat exchange medium replenishing part 6 into the heat collecting part 15.
In some alternative embodiments, the first power component 13, the second power component 23, and the third power component 63 are all heat exchange pumps.
In some alternative embodiments, the heat collecting member 15 is a heat exchanger, and the wall of the heat exchanger contacting the drying tower 1 is made of a heat conducting material.
Specifically, the heat exchanger is designed as a high-efficiency heat exchanger, waste heat is transferred to the heat exchanger through the outer wall of the drying tower 1, and a heat conduction material with a large surface area is adopted in the heat exchanger to improve the waste heat recovery efficiency, so that the heat exchange medium in the heat collecting part 15 is heated.
In some alternative embodiments, the third circulation duct 61 is provided with a third on-off switch 65 and a fourth on-off switch 66; the fourth circulation duct 62 is provided with a fifth on-off switch 67.
In some alternative embodiments, the heat collecting unit 15 includes a second temperature monitoring unit 16, where the second temperature monitoring unit 16 is communicatively connected to the controller, and the second temperature monitoring unit 16 is configured to monitor a temperature of a heat exchange medium inside the heat collecting unit 15, and send temperature information of the heat collecting unit 15 to the controller, and the controller is configured to determine whether the drying tower 1 is in an operating state. The second temperature monitoring component 16 is a temperature sensor.
In some alternative embodiments, the first volume monitoring member 17 is a first volume monitoring member 17, the first volume monitoring member 17 being in communication with the heat collecting member 15 for monitoring the level of heat exchange medium in the heat collecting member 15.
Specifically, when the first volume monitoring part 17 monitors that the liquid level of the heat collecting part 15 is low, a signal is transmitted to the controller, the controller transmits a closing instruction to the fourth opening/closing switch 66, transmits opening instructions to the third opening/closing switch 65 and the fifth opening/closing switch 67, transmits opening instructions to the third power part 63, and supplements the heat exchange medium in the heat exchange medium replenishing part 6 to the heat collecting part 15.
In some alternative embodiments, the first circulation line 11 is provided with a pneumatic ball valve in the region between the drying tower 1 and the first power unit 13.
In some alternative embodiments, the first on-off switch 12 is a solenoid valve.
Specifically, a first on-off switch 12 is provided in the region of the first circulation pipe 11 between the first power unit 13 and the heat storage device 2, and the first on-off switch 12 is an electromagnetic valve.
In some alternative embodiments, the second on-off switch 22 is a solenoid valve.
Specifically, a second on-off switch 22 is provided in the region of the second circulation pipe 21 between the heat storage device 2 and the heat radiation member 3, and the second on-off switch 22 is an electromagnetic valve.
In some alternative embodiments, the thermal storage device 2 includes a tank 24, a liner 25, and an insulating layer disposed on the exterior of the tank 24, the liner 25 being disposed inside the tank 24.
Specifically, the can 24 is generally made of steel plate, and has good sealing and pressure-resistant properties. The size and shape of the canister 24 may be designed according to actual needs. The inner container 25 is a main part for storing liquid gas in the heat storage device 2, and is typically made of stainless steel. The liner 25 has good corrosion resistance, and can ensure the safety and stability of the stored substances. Insulation to prevent heat loss, the thermal storage device 2 typically needs to be provided with insulation. The heat insulating layer is made of polystyrene and other materials and has excellent heat insulating performance. The tank 24 of the heat storage device 2 adopts high-performance phase change material as heat storage medium, and has larger heat storage capacity. The insulation of the thermal storage device 2 can reduce heat loss.
Further, the heat storage device 2 also comprises a support, which is an important component of the heat storage device 2, typically made of steel or concrete. The support can support the entire thermal storage device 2 so that it can be stably and safely placed on the ground.
Further, the heat storage device 2 is also provided with an inlet and an outlet, the inlet of the heat storage device 2 being provided at the top of the tank 24, and the outlet of the heat storage device 2 being typically provided at the bottom of the tank 24, through which the heat exchange medium can be conveyed to the tank 24.
In some alternative embodiments, the thermal storage device 2 is provided with a pressure monitoring component.
Specifically, the pressure monitoring component is a pressure gauge, and the pressure gauge can measure the pressure of liquid gas in the tank, so that the pressure abnormality in the tank 24 can be found in time, and the safe operation of the heat storage device 2 is ensured.
In some alternative embodiments, the thermal storage device 2 is provided with a third temperature monitoring component disposed on the tank 24, the temperature monitoring component monitoring the tank 24.
In some alternative embodiments, the third temperature monitoring component is a temperature transmitter.
In some alternative embodiments, the insulating layer is made of polystyrene.
In another aspect, the present application provides a system for heat preservation and heating of an electrolyte by waste heat recovery of a drying tower according to any one of the above, comprising the steps of: the first temperature monitoring part monitors the temperature information of the electrolyte in the gas-liquid separation part 4 and feeds the temperature information back to the controller; the controller controls the first circulation pipe 11, the second circulation pipe 21, and the third circulation pipe 61 to communicate, respectively, when confirming that the temperature of the electrolyte in the gas-liquid separation part 4 is less than a preset temperature value based on the temperature information; the heat exchange medium in the heat collecting part 15 is thermally circulated through the first circulation pipe 11, the heat storage device 2, the second circulation pipe 21, the heat radiating part 3, and the third circulation pipe 61 in this order.
Specifically, the first circulation pipe 11 is provided with a first on-off switch 12; the second circulation pipeline 21 is provided with a second on-off switch 22, the third circulation pipeline 61 is provided with a third on-off switch 65 and a fourth on-off switch 66, when the controller confirms that the temperature of the gas-liquid separation part 4 is smaller than a minimum preset value, the controller respectively controls the on-off of the first on-off switch 12, the second on-off switch 22, the third on-off switch 65 and the fourth on-off switch 66 based on the information fed back by the first temperature monitoring part, and a heat exchange medium in the heat collecting part 15 sequentially passes through the first circulation pipeline 11, the heat storage device 2, the second circulation pipeline 21, the heat radiating part 3 and the third circulation pipeline 61 to realize heat circulation.
Further, the controller can receive and process feedback information of each part in real time, for example, an operation state of the heat exchanger, an amount of heat stored in the heat storage device 2, a temperature of the electrolytic tank 5, and the like. According to actual conditions, the controller automatically adjusts the operation parameters of each part to realize the optimal operation of the whole system, and the monitoring device has a data recording function, so that the system performance can be conveniently analyzed and evaluated. The system shortens the starting time of the whole hydrogen production equipment and improves the operation efficiency through waste heat recovery and utilization. The effective utilization of the waste heat is beneficial to reducing the energy consumption and improving the production efficiency and economic benefit of the whole hydrogen production equipment.
In some alternative embodiments, the first volume monitoring means 17 measures the level information of the heat exchange medium in the heat collecting means and feeds back the level information to the controller; the controller controls the third circulation pipe 61 and the fourth circulation pipe 62 to communicate, respectively, when confirming that the liquid level in the heat collecting part 15 is less than a preset liquid level value based on the liquid level information; the heat exchange medium replenishment part 6 replenishes the heat collection part 15 with the heat exchange medium through the third circulation pipe 61 and the fourth circulation pipe 62.
Specifically, the third circulation pipe 61 is provided with a third on-off switch 65 and a fourth on-off switch 66; the position where the fourth circulation pipe 62 is connected with the third circulation pipe 61 is between the third on-off switch 65 and the fourth on-off switch 66, the fourth circulation pipe 62 is provided with a fifth on-off switch 67, and the controller controls the on-off of the fifth on-off switch 67 and the third on-off switch 65 based on the information fed back by the first volume monitoring part 17, and the third circulation pipe 61 and the fourth circulation pipe 62 receive the communication instruction, and the heat exchange medium replenishing part 6 supplements the liquid level to the heat collecting part 15 through the third circulation pipe 61 and the fourth circulation pipe 62.
In the present application, the term "plurality" means at least two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean 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 present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (20)
1. A system for drying tower waste heat recovery and for electrolyte heat preservation heating for collecting heat of a drying tower (1) to heat electrolyte inside a gas-liquid separation part (4), the gas-liquid separation part (4) being in communication with an electrolytic tank, characterized by comprising:
a heat collection member (15) which is provided outside the drying tower (1) and is provided with a first volume monitoring member (17);
a heat storage device (2) connected to the heat collection member (15) through a first circulation pipe (11);
the heat dissipation component (3) is arranged inside the gas-liquid separation component (4), is connected with the heat storage device (2) through a second circulating pipeline (21), is connected with the heat collection component (15) through a third circulating pipeline (61), and is internally provided with a first temperature monitoring component;
a heat exchange medium replenishing member (6) connected to the third circulation pipe (61) through a fourth circulation pipe (62);
the controller is used for respectively controlling the on-off of the first circulating pipeline (11), the second circulating pipeline (21) and the third circulating pipeline (61) based on the information fed back by the first temperature monitoring component; and on-off of the third circulating pipeline (61) and the fourth circulating pipeline (62) are respectively controlled based on the information fed back by the first volume monitoring component (17).
2. A system for heat preservation and heating of an electrolyte solution by recovering waste heat of a drying tower according to claim 1,
the first circulating pipeline (11) is provided with a first on-off switch (12);
the second circulating pipeline (21) is provided with a second on-off switch (22);
the third circulating pipeline (61) is provided with a third on-off switch (65) and a fourth on-off switch (66);
the position where the fourth circulating pipeline (62) is connected with the third circulating pipeline (61) is between the third on-off switch (65) and the fourth on-off switch (66), and the fourth circulating pipeline (62) is provided with a fifth on-off switch (67);
the controller respectively with first volume monitoring part (17), first temperature monitoring part first switch (12), second switch (22), third switch (65) with fourth switch (66) communication connection, based on the information of first temperature monitoring part feedback, control respectively first switch (12), second switch (22), third switch (65) with fourth switch (66) close or open, based on the information of first volume monitoring part (17) feedback, control fifth switch (67) with third switch (65) close or open.
3. The system for drying tower waste heat recovery and for electrolyte warming according to claim 2, further comprising a first power unit (13), said first power unit (13) being connected to said first circulation duct (11).
4. A system for drying tower waste heat recovery and for electrolyte warming according to claim 3, further comprising a second power unit (23), said second power unit (23) being connected to said second circulation line (21).
5. The system for drying tower waste heat recovery and for electrolyte warming according to claim 4, further comprising a third power component (63), the third power component (63) being connected to the fourth circulation pipe (62).
6. The system for drying tower waste heat recovery and for electrolyte warming according to claim 5, wherein the first power component (13), the second power component (23) and the third power component (63) are heat exchange pumps.
7. The system for heat recovery of waste heat of drying tower and for heat preservation and heating of electrolyte according to claim 1, characterized in that the heat collecting member (15) is a heat exchanger, and the material of the contact wall of the heat exchanger with the drying tower (1) is a heat conducting material.
8. The system for drying tower waste heat recovery and for electrolyte hold-down heating according to claim 1, wherein the heat collecting means (15) further comprises a second temperature monitoring means (16), the second temperature monitoring means (16) being in communication with the controller.
9. The system for drying tower waste heat recovery and for electrolyte hold-down heating according to claim 8, wherein the first and second temperature monitoring components (16) are each temperature sensors.
10. The system for drying tower waste heat recovery and for electrolyte warming according to claim 1, characterized in that the first volume monitoring means (17) is a liquid level monitoring means, which communicates with the heat collecting means (15).
11. A system for drying tower waste heat recovery and for electrolyte warming according to claim 3, characterized in that the first circulation pipe (11) is provided with a pneumatic ball valve in the area between the heat collecting part (15) and the first power part (13).
12. The system for heat preservation and heating of electrolyte by waste heat recovery of drying tower according to claim 2, wherein the first on-off switch (12) is a solenoid valve.
13. The system for heat preservation and heating of electrolyte by waste heat recovery of drying tower according to claim 2, wherein the second on-off switch (22) is a solenoid valve.
14. The system for heat preservation and heating of an electrolyte by waste heat recovery of a drying tower according to claim 1, wherein the heat storage device (2) comprises a tank body (24), an inner container (25) and a heat preservation layer, the inner container (25) is arranged inside the tank body (24), and the heat preservation layer is arranged outside the tank body (24).
15. The system for drying tower waste heat recovery and for electrolyte warming according to claim 14, characterized in that the heat storage device (2) further comprises a pressure monitoring means provided to the inner container (25).
16. The system for drying tower waste heat recovery and for electrolyte warming according to claim 14, wherein the heat storage device (2) further comprises a third temperature monitoring means provided to the tank (24).
17. The system for drying tower waste heat recovery and for electrolyte hold-down heating of claim 16, wherein the third temperature monitoring component is a temperature transmitter.
18. The system for heat preservation and heating of electrolyte according to claim 14, wherein the heat preservation layer is made of polystyrene.
19. A method for realizing the heat preservation and heating of electrolyte is realized by the system for recovering the waste heat of the drying tower and being used for the heat preservation and heating of electrolyte according to any one of claims 1-18,
the first temperature monitoring component monitors temperature information of the electrolyte in the gas-liquid separation component and feeds the temperature information back to the controller;
the controller respectively controls the first circulation pipeline, the second circulation pipeline and the third circulation pipeline to be communicated when confirming that the temperature of the electrolyte in the gas-liquid separation part is smaller than a preset temperature value based on temperature information;
the heat exchange medium in the heat collecting part sequentially passes through the first circulating pipeline, the heat storage device, the second circulating pipeline, the heat radiating part and the third circulating pipeline for heat circulation.
20. The method for realizing the heat preservation and heating of the electrolyte according to claim 19, wherein,
the first volume monitoring component measures liquid level information of the heat exchange medium in the heat collecting component and feeds the liquid level information back to the controller;
the controller respectively controls the third circulation pipeline to be communicated with the fourth circulation pipeline when confirming that the liquid level in the heat collecting component is smaller than a preset liquid level value based on the liquid level information;
the heat exchange medium replenishing part replenishes the heat exchange medium to the heat collecting part through the third circulation pipeline and the fourth circulation pipeline.
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| CN202310790864.7A CN116497400B (en) | 2023-06-30 | 2023-06-30 | System and method for recovering waste heat of drying tower and for insulating and heating electrolyte |
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| CN202310790864.7A CN116497400B (en) | 2023-06-30 | 2023-06-30 | System and method for recovering waste heat of drying tower and for insulating and heating electrolyte |
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