CN114044562A - Integrated system of electrolysis device and water treatment desalination system - Google Patents
Integrated system of electrolysis device and water treatment desalination system Download PDFInfo
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- CN114044562A CN114044562A CN202111448755.4A CN202111448755A CN114044562A CN 114044562 A CN114044562 A CN 114044562A CN 202111448755 A CN202111448755 A CN 202111448755A CN 114044562 A CN114044562 A CN 114044562A
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- water treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
Abstract
The invention discloses an integrated system of an electrolysis device and a water treatment desalination system, which comprises the electrolysis device, a third heat exchanger and a water treatment device, wherein the water treatment device is used for receiving part of heat transferred by the third heat exchanger and desalinating seawater to obtain water vapor and high-concentration brine, and the other part of heat collected by the third heat exchanger is used for preheating feed gas supplied to the electrolysis device. The invention adopts pioneering system integration to carry out system integration on the renewable energy hydrogen production and electrolysis device and the water treatment system, not only solves the problem of redundant electric quantity consumption of renewable energy power generation, converts electric energy into hydrogen for storage through electrolysis of the electrolysis device in time, but also can provide fresh water for the environment of the renewable energy device through the water treatment system by utilizing the abundant waste heat of the electrolysis device, and simultaneously can provide steam and pure water required by electrolysis for similar high-temperature and low-temperature electrolysis systems, and the produced high-concentration brine can be used as an industrial raw material for further processing and preparing industrial products such as salt, alkali, chlorine and the like.
Description
Technical Field
The invention relates to an electrolysis device and a water treatment device, in particular to an integrated system of the electrolysis device and a water treatment desalination system for promoting the development of renewable energy.
Background
The wide application of new energy becomes the mainstream of energy development, wherein the application of solar energy, wind energy, nuclear energy and hydroenergy is the most extensive, and the industrialization level is the highest. Wherein for example offshore wind power, the loading capacity is rapidly expanded. However, the construction of the power grid supporting facilities lags behind the wind power installation amount, and the phenomena of wind abandoning and electricity limiting exist. In order to deal with the phenomena of wind power plant wind abandoning and electricity limiting, and the like, a novel energy storage technology for wind power hydrogen production is provided besides improving wind power planning and perfecting market operation mechanisms to reduce grid connection difficulty, so that wind energy resources in partial areas are consumed, and the utilization rate of wind energy is improved.
According to preliminary estimation, the potential offshore wind energy installed capacity is measured in hundred million kilowatts, and the significance of development of offshore wind energy utilization and seawater hydrogen production is great along with the improvement of fan technology and the enlargement of wind power installed scale.
In recent years, new energy hydrogen production technology is receiving attention, and with the continuous expansion of new energy installation scale, the breakthrough of water electrolysis hydrogen production technology and the great reduction of cost in the future, the new energy hydrogen production is expected to realize large-scale commercialization. With the rapid increase of installed capacity of wind power, more and more problems are gradually appearing. The challenges brought to the safety of the power grid by large-scale uncontrollable low-quality wind power grid connection are solved; the gathering of large-scale wind power plants brings great pressure to local power grid transmission, and a large amount of wind abandon is caused; a large amount of grid-connected wind power causes more and more difficulty for a power grid dispatching center, and causes the power grid balancing cost to gradually increase.
There are many unavoidable difficulties in developing offshore wind power. From the technical point of view, the randomness, instability and fluctuation of offshore wind power are large. Offshore wind power plants face problems of offshore remoteness, power consumption, material transportation, fresh water supply and the like, and efficient and environment-friendly technical solutions are needed.
Disclosure of Invention
The invention aims to solve the problems and provide an integrated system of an electrolysis device and a water treatment desalination system for promoting the development of new energy.
In order to achieve the purpose, the invention adopts the following technical scheme:
an integrated system of an electrolyzer and a water treatment desalination system comprising:
the electrolysis device is used for electrolyzing and preparing hydrogen;
a third heat exchanger for collecting heat and exchanging heat;
the water treatment device is used for receiving part of heat transferred by the third heat exchanger and desalting seawater to obtain water vapor and high-concentration brine;
wherein another part of the heat collected by the third heat exchanger is used for preheating fuel gas supplied to the electrolysis unit.
In the invention, with the wider application scenes of renewable energy sources, the transmission cost of many severe environments such as desert photovoltaic power plants and offshore wind power plants is higher and higher. Therefore, the hydrogen production by using renewable energy sources is important for energy storage and redundant electricity consumption, and the gas generated by electrolysis can be used as industrial raw materials and fuels and can be conveyed through a pipe network, so that the hydrogen production method becomes an important technical option for further promoting the development of renewable energy sources. In order to solve the problems of unstable power generation and electric power consumption of renewable energy sources, energy conversion modes are actively explored, and the key direction of the current research is to convert the renewable energy sources into industrial gases such as hydrogen and the like for utilization. The new energy power can be directly used for preparing industrial raw materials and fuels such as hydrogen, synthesis gas, synthetic methane, synthetic ammonia and the like near the new energy power generation device without being transmitted by a high-voltage power transmission line. Renewable new energy power consumption and water electrolysis hydrogen production are organically combined, and the power generation device can be integrated with a low-temperature electrolysis system and a high-temperature electrolysis system, such as a solid oxide electrolysis device (SOEC), to produce hydrogen and synthesis gas and simultaneously produce fresh water and high-temperature steam.
When the renewable energy source is used for producing hydrogen, the waste heat generated in the electrolytic process of the electrolytic device can be utilized to provide heat energy for the water treatment device, or the renewable power is used for directly driving the water treatment device to desalt water sources such as seawater and the like by using local materials, so that pure water or water vapor required by electrolysis can be obtained, fresh water for industrial life can be provided, and high-concentration brine or low-concentration brine generated by the water treatment system can be used as an industrial raw material for further processing to prepare industrial products such as salt, alkali, chlorine and the like.
The heat exchanger further comprises a first heat exchanger and a second heat exchanger, wherein the first heat exchanger is connected with the second heat exchanger, and the second heat exchanger is connected with the third heat exchanger and is used for receiving part of heat transmitted by the third heat exchanger.
As a preferable aspect of the present invention, the fuel gas includes oxygen, nitrogen and water vapor, and further includes a first flow and pressure control device and a second flow and pressure control device, the first flow and pressure control device is respectively connected to an oxygen and nitrogen gas source and the first heat exchanger, and the second flow and pressure control device is respectively connected to a water vapor pipeline and the second heat exchanger.
The invention also comprises a condenser, wherein part of the water vapor obtained by the water treatment device is introduced into the condenser to obtain pure water.
As a preferable scheme of the invention, the other part of the water vapor obtained by the water treatment device is connected to a water vapor pipeline.
The water treatment device further comprises energy supply devices, and the energy supply devices are respectively connected with the electrolysis device and the water treatment device.
As a preferable aspect of the present invention, the energy supply device is a renewable energy source energy supply device.
In a preferred embodiment of the present invention, a gas cylinder is further connected to the third heat exchanger.
In a preferred embodiment of the present invention, the electrolyzer comprises one of a high temperature electrolyzer or a plasma electrolyzer, a proton exchange membrane electrolyzer, an alkali type electrolyzer or an alkali type ion membrane electrolyzer.
In a preferred embodiment of the present invention, the high-concentration brine or the low-concentration brine obtained by the water treatment apparatus is used as an industrial raw material for further processing.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts pioneering system integration to carry out system integration on the hydrogen production and electrolysis device of new energy and the water treatment system, can solve the problem of redundant electric quantity consumption of power generation of renewable energy sources, converts electric energy into hydrogen and chemicals for storage through electrolysis of the electrolysis device in time, can provide fresh water for the environment of the renewable energy source device through the water treatment system by utilizing rich waste heat of the electrolysis device, can also provide raw materials of water vapor and pure water required by electrolysis for similar high-temperature and low-temperature electrolysis systems, and can produce brine which can be used as an industrial raw material for further processing and preparing industrial products such as salt, alkali, chlorine and the like.
Drawings
FIG. 1 is a schematic view of example 1.
FIG. 2 is a schematic view of example 2.
In the figure, 1, a high-temperature electrolysis device; 2. a water treatment device; 3. a third heat exchanger; 4. a first heat exchanger; 5. a second heat exchanger; 6. a first flow and pressure control device; 7. a second flow and pressure control device; 8. a gas source; 9. a water vapor conduit; 10. a gas cylinder; 11. an energy supply device; 12. a low temperature electrolysis unit; 13. a condenser; 14. an optional external heat energy supply.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The electrolysis device comprises one of a high-temperature electrolysis device or a plasma electrolysis device, a proton exchange membrane electrolysis device, a basic electrolysis device or a basic ion membrane electrolysis device, and is the prior art, and detailed description of the specific structure is omitted below.
The water treatment device, the heat exchanger, the flow and pressure control device and the condenser are all the prior art, and detailed structures of the water treatment device, the heat exchanger, the flow and pressure control device and the condenser are not described below.
The energy supply device can be various renewable energy sources such as wind energy and solar energy.
The water treatment stage can be seawater desalination, sewage treatment and the like.
Referring to fig. 1 and 2, the present invention provides an integrated system of an electrolysis device and a water treatment desalination system, comprising:
the electrolysis device comprises a high-temperature electrolysis device 1 or a low-temperature electrolysis device 12, and is used for electrolyzing to prepare hydrogen;
a third heat exchanger 3, the third heat exchanger 3 for collecting heat and exchanging heat;
the water treatment device 2 is used for receiving part of heat transferred by the third heat exchanger 3, and is used for desalination treatment of seawater to obtain water vapor and high-concentration brine;
another part of the heat collected by the third heat exchanger 3 is used for preheating fuel gas supplied to the electrolysis unit, which comprises oxygen, nitrogen and water vapour.
The heat exchanger further comprises a first heat exchanger 4 and a second heat exchanger 5, wherein the first heat exchanger 4 is connected with the second heat exchanger 5, and the second heat exchanger 5 is connected with the third heat exchanger 3 and is used for receiving part of heat transmitted by the third heat exchanger 3.
The device also comprises a first flow and pressure control device 6 and a second flow and pressure control device 7, wherein the first flow and pressure control device 6 is respectively connected with an oxygen and nitrogen gas source 8 and the first heat exchanger 4, and the second flow and pressure control device 7 is respectively connected with a water vapor pipeline 9 and the second heat exchanger 5.
The device also comprises a condenser 13, wherein part of the water vapor obtained by the water treatment device 2 is introduced into the condenser 13 to obtain pure water, and the other part of the water vapor obtained by the water treatment device 2 is connected to a water vapor pipeline.
And the energy supply device 11 and the optional external heat energy supply device 14 are further included, and the energy supply device 11 is respectively connected with the electrolysis device and the water treatment device 2.
The energy supply device 11 is a renewable energy source energy supply device.
The optional external heat supply 14 may be solar photo-thermal, wind thermal, or industrial waste heat, etc.
A gas cylinder 10 is also connected to the third heat exchanger 3.
Example 1
Referring to fig. 1, the present embodiment provides that 240-; the waste heat of the low-temperature loop is applied to a water treatment device, part of steam is generated to be used as raw material gas for hydrogen production by electrolysis, the rest steam is used for producing fresh water through a condenser to be used as industrial and domestic water, the energy utilization efficiency of the whole system can reach over 90 percent, and the hydrogen production efficiency by electrolysis can reach 80-85 percent.
The produced high-concentration brine can be used as an industrial raw material for further processing (such as sodium chloride electrolysis) to prepare industrial products such as salt, alkali, chlorine and the like.
Example 2
Referring to fig. 2, 1000 kwh of electricity can be used for preparing 210-.
The produced high-concentration brine can be used as an industrial raw material for further processing (such as sodium chloride electrolysis) to prepare industrial products such as salt, alkali, chlorine and the like.
The invention supplies renewable energy electric energy to low-temperature or high-temperature electrolytic devices, such as an alkali type electrolytic device (AEL), a proton exchange membrane electrolytic device (PEMEL), an alkali type ionic membrane electrolytic device (AEMEL) or a solid oxide electrolytic device (SOEC) and a plasma electrolytic device, for electrolytic hydrogen production, in the hydrogen production link, a cooling system and product gas carry waste heat, and heat energy is transmitted to a water treatment device through a heat exchanger to produce fresh water. The remaining high-concentration brine is subjected to other treatments (may be subjected to a solar salt process, or used as a NaCl electrolysis feedstock). The electric energy generated by renewable energy sources can also be directly used for the water treatment device to generate steam or pure water which is respectively supplied to the high-temperature electrolysis device or the low-temperature electrolysis device for operation.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (10)
1. An integrated system of an electrolyzer and a water treatment desalination system, comprising:
the electrolysis device is used for electrolyzing and preparing hydrogen;
a third heat exchanger for collecting heat and exchanging heat;
the water treatment device is used for receiving part of heat transferred by the third heat exchanger and desalting seawater to obtain water vapor and high-concentration brine;
wherein another part of the heat collected by the third heat exchanger is used for preheating fuel gas supplied to the electrolysis unit.
2. The integrated system of an electrolysis device and a water treatment desalination system as claimed in claim 1, further comprising a first heat exchanger and a second heat exchanger, wherein the first heat exchanger is connected to the second heat exchanger, and the second heat exchanger is connected to the third heat exchanger for receiving a portion of heat transferred by the third heat exchanger.
3. The integrated system of an electrolysis device and a water treatment desalination system of claim 2, wherein the fuel gas comprises oxygen, nitrogen and water vapor, and further comprising a first flow and pressure control device and a second flow and pressure control device, wherein the first flow and pressure control device is connected to a source of oxygen and nitrogen and the first heat exchanger, respectively, and the second flow and pressure control device is connected to a water vapor pipeline and the second heat exchanger, respectively.
4. The integrated system of an electrolysis device and a water treatment desalination system as claimed in claim 3, further comprising a condenser, wherein the water vapor obtained from the water treatment device is partially introduced into the condenser to obtain pure water.
5. The integrated system of an electrolysis device and a water treatment desalination system as claimed in claim 4, wherein another part of the water vapor obtained by the water treatment device is connected to a water vapor pipeline for producing hydrogen by electrolysis.
6. The integrated system of an electrolysis device and a water treatment desalination system as claimed in claim 1, further comprising energy supply devices respectively connected with the electrolysis device and the water treatment device.
7. The integrated system of an electrolysis device and a water treatment desalination system according to claim 6, wherein the energy supply device is a renewable energy supply device.
8. The integrated system of electrolysis unit and water desalination system of claim 1, wherein the third heat exchanger is further connected to a gas cylinder.
9. The integrated system of an electrolyzer and a water treatment desalination system as recited in any one of claims 1-8 wherein the electrolyzer comprises one of a high temperature electrolyzer or a plasma electrolyzer, a proton exchange membrane electrolyzer, an alkaline electrolyzer or an alkaline ion membrane electrolyzer.
10. The integrated system of electrolysis unit and water treatment desalination system of claim 8, wherein the high or low concentration brine obtained from the water treatment unit is used as industrial raw material for further processing.
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| CN202111448755.4A CN114044562A (en) | 2021-11-30 | 2021-11-30 | Integrated system of electrolysis device and water treatment desalination system |
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| CN202111448755.4A CN114044562A (en) | 2021-11-30 | 2021-11-30 | Integrated system of electrolysis device and water treatment desalination system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114932109A (en) * | 2022-04-26 | 2022-08-23 | 广东电网有限责任公司广州供电局 | Transformer for offshore wind power and cleaning method thereof |
| CN117468021A (en) * | 2023-11-09 | 2024-01-30 | 中国科学院大连化学物理研究所 | System and method for producing hydrogen by using alkaline and proton exchange membrane in series-parallel connection with seawater |
| CN117468026A (en) * | 2023-03-09 | 2024-01-30 | 中国科学院大连化学物理研究所 | System and method for co-production of hydrogen and pure water based on offshore wind power |
| CN117466365A (en) * | 2023-03-09 | 2024-01-30 | 中国科学院大连化学物理研究所 | Electrolytic water hydrogen production coupling sea water desalination system and method |
| CN117468026B (en) * | 2023-03-09 | 2024-05-03 | 中国科学院大连化学物理研究所 | System and method for co-production of hydrogen and pure water based on offshore wind power |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114932109A (en) * | 2022-04-26 | 2022-08-23 | 广东电网有限责任公司广州供电局 | Transformer for offshore wind power and cleaning method thereof |
| CN117468026A (en) * | 2023-03-09 | 2024-01-30 | 中国科学院大连化学物理研究所 | System and method for co-production of hydrogen and pure water based on offshore wind power |
| CN117466365A (en) * | 2023-03-09 | 2024-01-30 | 中国科学院大连化学物理研究所 | Electrolytic water hydrogen production coupling sea water desalination system and method |
| CN117468026B (en) * | 2023-03-09 | 2024-05-03 | 中国科学院大连化学物理研究所 | System and method for co-production of hydrogen and pure water based on offshore wind power |
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