CN216107235U - Waste heat recovery process system of large alkaline electrolyzed water hydrogen production device - Google Patents
Waste heat recovery process system of large alkaline electrolyzed water hydrogen production device Download PDFInfo
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- CN216107235U CN216107235U CN202122140495.6U CN202122140495U CN216107235U CN 216107235 U CN216107235 U CN 216107235U CN 202122140495 U CN202122140495 U CN 202122140495U CN 216107235 U CN216107235 U CN 216107235U
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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
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The utility model relates to a waste heat recovery process system of a large-scale alkaline electrolyzed water hydrogen production device, wherein an outlet of the electrolyzed water hydrogen production system is connected with an inlet of a desalted water closed cooling device through a third outlet pipeline; the waste heat recovery device comprises a first inlet pipeline and a first outlet pipeline, wherein the first inlet pipeline is connected with an upstream pipeline of the third outlet pipeline, and the first outlet pipeline is connected with a downstream pipeline of the third outlet pipeline. The utility model recycles the heat generated by the hydrogen production device by alkaline electrolysis water in operation to the hydrogen production device in a hot standby state or a cold starting state, reduces the energy consumption of the system to the maximum extent, and improves the energy utilization efficiency of the whole hydrogen production system.
Description
Technical Field
The utility model belongs to the technical field of new energy, and relates to a waste heat recovery process system of a large alkaline electrolyzed water hydrogen production device.
Background
Along with the development of constructing a novel power system taking new energy as a main body and the popularization and application of green hydrogen, a large-capacity water electrolysis hydrogen production device taking renewable energy sources such as wind power, photoelectricity and the like as power sources is more and more emphasized by people. But the renewable energy sources have the characteristics of intermittency, volatility, randomness and the like, so that the matched high-capacity hydrogen production device needs to be started and stopped frequently according to the power supply condition during actual operation.
The alkaline electrolytic water hydrogen production device which stops running can be in a hot start state or a cold start state according to the length of the start interval time. The length of the start-up time is closely related to the length of time the electrolyte reaches the desired temperature, whether the cell is in a hot or cold start. For the electrolytic cell in a hot standby state, the alkali liquor can be gradually reduced along with the extension of the shutdown time, and when the temperature is reduced to below 50 ℃, the time for hot start again can be prolonged; for the cold-start electrolytic cell, usually, when the temperature of the alkali liquor reaches 50 ℃, the main performance index of the device can reach the design value, and because the temperature of the initial alkali liquor is low, the temperature of the alkali liquor is required to be gradually increased to 50 ℃ by putting the electrolytic cell into operation, and the time required in the process is long (generally about 2-3 hours). Therefore, to shorten the start-up time of the cell, it is generally necessary to provide external heat to heat the electrolyte to maintain or quickly bring the electrolyte to the proper operating temperature.
FIG. 1 is a schematic diagram of a waste heat recovery process system of a conventional large-scale alkaline water electrolysis hydrogen production device.
The prior art is that the hydrogen plant of alkaline electrolysis water in service can produce the heat, for preventing the device overtemperature, is taken the heat out by the alkaline electrolyte in the electrolysis trough, and alkali lye can be cooled off through the demineralized water heat transfer with demineralized water closed cooling device, then the demineralized water carries out the heat transfer cooling through closing water cooling water heat exchanger and outside cold water source. For large-scale alkaline water electrolysis hydrogen production equipment, the generated heat is higher and higher due to the increase of the capacity, the required cooling water amount is more and more, and a corresponding cooling water tower is required to be configured for saving the water consumption of the cooling water, so that the system investment and the occupied area are increased, the heat is lost, and the energy utilization efficiency of the whole system is reduced.
In summary, the conventional alkaline water electrolysis hydrogen production device has the problems that the excessive heat generated in the operation is lost, and the alkaline water electrolysis hydrogen production device in the hot standby state or the cold start state has long start-up time and needs additional heat supplement.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a waste heat recovery process system of a large alkaline electrolyzed water hydrogen production device.
The technical means adopted by the utility model are as follows.
A waste heat recovery process system of a large-scale alkaline electrolyzed water hydrogen production device is characterized in that an outlet of the electrolyzed water hydrogen production system is connected with an inlet of a desalted water closed cooling device through a third outlet pipeline, an inlet of the electrolyzed water hydrogen production system is connected with an outlet of the desalted water closed cooling device through a third inlet pipeline, a cooling water tower is arranged at the downstream of the desalted water closed cooling device, and the waste heat recovery device is connected with the electrolyzed water hydrogen production system; the waste heat recovery device comprises a first inlet pipeline, a first outlet pipeline and a first inlet pipe
The water electrolysis hydrogen production system comprises a first hydrogen production device and a second hydrogen production device, outlet pipelines of the first hydrogen production device and the second hydrogen production device are respectively connected with a third outlet pipeline, and inlet pipelines of the first hydrogen production device and the second hydrogen production device are respectively connected with a third inlet pipeline.
A first control valve is arranged on an outlet pipeline of the first hydrogen production device, and a first outlet branch is arranged on an upstream pipeline of the first control valve; a second control valve is arranged on an inlet pipeline of the first hydrogen production device, and a first inlet branch is arranged on a pipeline downstream of the second control valve; the outlet pipeline of the second hydrogen production device is provided with a third control valve, the upstream pipeline of the third control valve is provided with a second outlet branch, the inlet pipeline of the second hydrogen production device is provided with a fourth control valve, and the downstream pipeline of the fourth control valve is provided with a second inlet branch.
The waste heat recovery device further comprises a fourth inlet pipeline and a fourth outlet pipeline, the first outlet branch and the second outlet branch are respectively connected with the fourth inlet pipeline, and the first inlet branch and the second inlet branch are respectively connected with the fourth outlet pipeline.
The first outlet branch is provided with a fifth control valve, the first inlet branch is provided with a sixth control valve, the second outlet branch is provided with a seventh control valve, and the second inlet branch is provided with an eighth control valve.
The first inlet pipeline is provided with a ninth control valve.
The beneficial effects produced by the utility model are as follows.
(1) The utility model ensures that the temperature of the alkali liquor in the electrolytic tank of the alkaline electrolytic water hydrogen production device in a hot standby state is maintained at a proper temperature of about 50 ℃, thereby meeting the response requirement of quick start of the alkaline electrolytic water hydrogen production device with a fluctuating power supply.
(2) The utility model enables the temperature of the alkali liquor in the electrolytic tank of the alkaline electrolytic water hydrogen production device in a cold start state to reach the proper temperature as soon as possible, thereby greatly shortening the start time of the electrolytic tank.
(3) The utility model reduces the energy consumption of the system to the utmost extent and improves the energy utilization efficiency of the whole hydrogen production system.
Drawings
FIG. 1 is a schematic diagram of a waste heat recovery process system of a conventional large-scale alkaline water electrolysis hydrogen production device.
Fig. 2 is a schematic structural diagram of the present invention.
Detailed Description
As shown in fig. 1, an outlet of the large-scale alkaline electrolyzed water hydrogen production system is connected with an inlet of a demineralized water closed cooling device 4 through a third outlet pipeline 111, the third outlet pipeline 111 is provided with a tenth control valve 31, an inlet of the electrolyzed water hydrogen production system is connected with an outlet of the demineralized water closed cooling device 4 through a third inlet pipeline 112, and a cooling water tower 5 is arranged at the downstream of the demineralized water closed cooling device 4.
The water electrolysis hydrogen production system comprises a first hydrogen production device 1 and a second hydrogen production device 2. The outlet pipes of the first hydrogen production device 1 and the second hydrogen production device 2 are respectively connected with a third outlet pipe 111 at a point A, and the inlet pipes of the first hydrogen production device 1 and the second hydrogen production device 2 are respectively connected with a third inlet pipe 112 at a point B.
As shown in fig. 2, the present invention further includes a waste heat recovery device 6, wherein the waste heat recovery device 6 further includes a first inlet pipeline 61 and a first outlet pipeline 62, the first inlet pipeline 61 is connected to the upstream pipeline of the tenth control valve 31, and the first outlet pipeline 62 is connected to the downstream pipeline of the tenth control valve 31. A ninth control valve 32 is provided on the first inlet line 61.
A first control valve 13 is arranged on an outlet pipeline of the first hydrogen production device 1, a first outlet branch 631 is arranged on an upstream pipeline of the first control valve 13, and a fifth control valve 14 is arranged on the first outlet branch 631. A second control valve 12 is provided on the inlet line of the first hydrogen production apparatus 1, a first inlet branch 641 is provided on the line downstream of the second control valve 12, and a sixth control valve 11 is provided on the first inlet branch 641.
The outlet pipeline of the second hydrogen production device 2 is provided with a third control valve 23, the pipeline upstream of the third control valve 23 is provided with a second outlet branch 632, and the second outlet branch 632 is provided with a seventh control valve 24. A fourth control valve 22 is provided on the inlet line of the second hydrogen production apparatus 2, a second inlet branch 642 is provided on the line downstream of the fourth control valve 22, and the eighth control valve 21 is provided on the second inlet branch 642.
The waste heat recovery device 6 further includes a fourth inlet pipeline 63 and a fourth outlet pipeline 64, the first outlet branch 631 and the second outlet branch 632 are respectively connected to the fourth inlet pipeline 63 at a point D, and the first inlet branch 641 and the second inlet branch 642 are respectively connected to the fourth outlet pipeline 64 at a point C.
The control valves described in this embodiment are all valves.
When the first hydrogen production device 1 operates and the second hydrogen production device 2 operates in a hot standby or cold start state, the first control valve 13 is opened, the demineralized water which is subjected to heat exchange with the alkali liquor and is heated up flows out of the outlet pipeline of the first hydrogen production device 1, sequentially enters the waste heat recovery device 6 through the third outlet pipeline 111 and the first inlet pipeline 61, and enters the demineralized water closed cooling device 4 through the first outlet pipeline 62 after heat exchange is completed. At this time, the second control valve 12 is opened, and the demineralized water cooled by the demineralized water closed cooling device 4 sequentially passes through the third inlet pipeline 112 and the inlet pipeline of the first hydrogen production device 1 and returns to the first hydrogen production device 1, so as to continuously cool the alkali liquor. Then, the seventh control valve 24 is opened, the cooled demineralized water flows out from the outlet pipeline of the second hydrogen production device 2, and sequentially flows through the second outlet branch 632 and the fourth inlet pipeline 63 to enter the waste heat recovery device 6, at this time, the eighth control valve 21 is opened, the demineralized water after heat exchange sequentially flows through the fourth outlet pipeline 64 and the second inlet branch 642 to return to the second hydrogen production device 2, and the heated demineralized water can heat the alkali liquor to be heated in the second hydrogen production device 2.
When the second hydrogen production device 2 operates and the first hydrogen production device 1 is in a hot standby or cold start state, the third control valve 23 is opened, the demineralized water which is subjected to heat exchange with the alkali liquor and is heated up flows out of the outlet pipeline of the second hydrogen production device 2, sequentially enters the waste heat recovery device 6 through the third outlet pipeline 111 and the first inlet pipeline 61, and enters the demineralized water closed cooling device 4 through the first outlet pipeline 62 after heat exchange is completed. At this time, the fourth control valve 22 is opened, and the demineralized water cooled by the demineralized water closed cooling device 4 sequentially passes through the third inlet pipeline 112 and the inlet pipeline of the second hydrogen production device 2 and returns to the second hydrogen production device 2, so as to continuously cool the alkali liquor. Then, the fifth control valve 14 is opened, the cooled demineralized water flows out from the outlet pipeline of the first hydrogen production device 1, and sequentially flows through the first outlet branch 631 and the fourth inlet pipeline 63 to enter the waste heat recovery device 6, at this time, the sixth control valve 11 is opened, the demineralized water after heat exchange sequentially flows through the fourth outlet pipeline 64 and the first inlet branch 641 to return to the first hydrogen production device 1, and the heated demineralized water can heat the alkali liquor to be heated in the first hydrogen production device 1.
In practical implementation, the opening degrees of the ninth control valve 32 and the tenth control valve 31 can be adjusted according to the heat quantity provided by the first hydrogen production device 1 and the heat quantity acceptable by the second hydrogen production device 2, so as to ensure that the temperature of the alkali liquor is controlled at 50-60 ℃. If the heat of the water electrolysis hydrogen production system can not be completely recovered, the water electrolysis hydrogen production system can be continuously cooled by using the cooling water tower 5. The utility model recycles the heat generated by the water electrolysis hydrogen production system in operation to the hydrogen production device in a hot standby state or a cold starting state, thereby greatly improving the energy utilization efficiency.
Claims (6)
1. A waste heat recovery process system of a large-scale alkaline water electrolysis hydrogen production device is characterized in that an outlet of the water electrolysis hydrogen production system is connected with an inlet of a desalted water closed cooling device (4) through a third outlet pipeline (111), an inlet of the water electrolysis hydrogen production system is connected with an outlet of the desalted water closed cooling device (4) through a third inlet pipeline (112), a cooling water tower (5) is arranged at the downstream of the desalted water closed cooling device (4),
the system also comprises a waste heat recovery device (6), wherein the waste heat recovery device (6) is connected with the water electrolysis hydrogen production system;
the waste heat recovery device (6) comprises a first inlet pipeline (61) and a first outlet pipeline (62), wherein the first inlet pipeline (61) is connected with an upstream pipeline of the third outlet pipeline (111), and the first outlet pipeline (62) is connected with a downstream pipeline of the third outlet pipeline (111).
2. The waste heat recovery process system of the large alkaline water electrolysis hydrogen production device according to claim 1, characterized in that the water electrolysis hydrogen production system comprises a first hydrogen production device (1) and a second hydrogen production device (2), outlet pipelines of the first hydrogen production device (1) and the second hydrogen production device (2) are respectively connected with a third outlet pipeline (111), and inlet pipelines of the first hydrogen production device (1) and the second hydrogen production device (2) are respectively connected with a third inlet pipeline (112).
3. The waste heat recovery process system of the large alkaline water electrolysis hydrogen production device according to claim 2, characterized in that a first control valve (13) is arranged on an outlet pipeline of the first hydrogen production device (1), and a first outlet branch (631) is arranged on an upstream pipeline of the first control valve (13); a second control valve (12) is arranged on an inlet pipeline of the first hydrogen production device (1), and a first inlet branch (641) is arranged on a downstream pipeline of the second control valve (12); a third control valve (23) is arranged on an outlet pipeline of the second hydrogen production device (2), a second outlet branch (632) is arranged on an upstream pipeline of the third control valve (23), a fourth control valve (22) is arranged on an inlet pipeline of the second hydrogen production device (2), and a second inlet branch (642) is arranged on a downstream pipeline of the fourth control valve (22).
4. The waste heat recovery process system of the large alkaline electrolyzed water hydrogen production device according to claim 3, wherein the waste heat recovery device (6) further comprises a fourth inlet pipeline (63) and a fourth outlet pipeline (64), the first outlet branch (631) and the second outlet branch (632) are respectively connected to the fourth inlet pipeline (63), and the first inlet branch (641) and the second inlet branch (642) are respectively connected to the fourth outlet pipeline (64).
5. The waste heat recovery process system of the large alkaline water electrolysis hydrogen production device according to claim 4, characterized in that the first outlet branch (631) is provided with a fifth control valve (14), the first inlet branch (641) is provided with a sixth control valve (11), the second outlet branch (632) is provided with a seventh control valve (24), and the second inlet branch (642) is provided with an eighth control valve (21).
6. The electrolyte temperature control system suitable for the production of hydrogen by the alkaline electrolysis of water according to claim 1, characterized in that the first inlet line (61) is provided with a ninth control valve (32).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122140495.6U CN216107235U (en) | 2021-09-06 | 2021-09-06 | Waste heat recovery process system of large alkaline electrolyzed water hydrogen production device |
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| CN202122140495.6U CN216107235U (en) | 2021-09-06 | 2021-09-06 | Waste heat recovery process system of large alkaline electrolyzed water hydrogen production device |
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| CN216107235U true CN216107235U (en) | 2022-03-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114807960A (en) * | 2022-04-13 | 2022-07-29 | 四川华能氢能科技有限公司 | Waste heat recovery management and control platform of large alkaline electrolyzed water hydrogen production device |
| WO2023226425A1 (en) * | 2022-05-23 | 2023-11-30 | 阳光氢能科技有限公司 | Hydrogen production system, and thermal management method and apparatus therefor |
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2021
- 2021-09-06 CN CN202122140495.6U patent/CN216107235U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114807960A (en) * | 2022-04-13 | 2022-07-29 | 四川华能氢能科技有限公司 | Waste heat recovery management and control platform of large alkaline electrolyzed water hydrogen production device |
| WO2023226425A1 (en) * | 2022-05-23 | 2023-11-30 | 阳光氢能科技有限公司 | Hydrogen production system, and thermal management method and apparatus therefor |
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