CN112520929A - Diving reverse osmosis seawater desalination system for continuously improving fresh water by using ocean temperature difference energy - Google Patents
Diving reverse osmosis seawater desalination system for continuously improving fresh water by using ocean temperature difference energy Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C02F2201/00—Apparatus for treatment of water, waste water or sewage
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- C02F2201/007—Modular design
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- C—CHEMISTRY; METALLURGY
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- C02F2301/00—General aspects of water treatment
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- C—CHEMISTRY; METALLURGY
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Y02A20/131—Reverse-osmosis
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Abstract
The invention provides a diving reverse osmosis seawater desalination system for continuously lifting fresh water by using ocean temperature difference energy, which utilizes a conveyor driven by the ocean temperature difference energy to lift the fresh water and can continuously lift the fresh water, so that the whole device is stable in mechanical conveying and the conveying efficiency is improved. The reverse osmosis seawater desalination module comprises a reverse osmosis seawater desalination module and a fresh water lifting module, wherein the reverse osmosis seawater desalination module specifically comprises a first filtering device, a circulating pump, a reverse osmosis membrane assembly and a closed container, the first filtering device, the circulating pump and the reverse osmosis assembly are arranged in the closed container, the first filtering device is connected to an external local seawater inlet through an external pipeline, an outlet of the first filtering device is connected with an inlet of the circulating pump, an outlet of the circulating pump is connected with an inlet of the reverse osmosis membrane assembly, a seawater outlet of the reverse osmosis membrane assembly is communicated to the outside through a second pipeline, and a fresh water outlet of the reverse osmosis membrane assembly is communicated to an inlet of an external fresh water storage tank through a third pipeline.
Description
Technical Field
The invention relates to the technical field of seawater desalination, in particular to a diving reverse osmosis seawater desalination system for continuously improving fresh water by using ocean temperature difference energy.
Background
As the world population and economy grow, the demand for fresh water continues to grow, creating tremendous pressure on the supply of fresh water. Desalination of sea water provides a viable solution. At present, reverse osmosis seawater desalination, low-temperature multi-effect distillation seawater desalination and multi-stage flash evaporation seawater desalination are three major mainstream seawater desalination technologies. The reverse osmosis seawater desalination occupies more than two thirds of the seawater desalination market due to lower investment and operation cost, compact device, less occupied area, simple operation and easy maintenance.
The reverse osmosis seawater desalination technology utilizes a reverse osmosis principle to increase the seawater pressure to be higher than the osmotic pressure, so that water molecules pass through a reverse osmosis membrane and are separated from salt and impurities, thereby obtaining fresh water. The seawater pressure, i.e. the operating pressure, is generally 5.5MPa to 7MPa, and is provided by a high-pressure pump, and the energy consumption consumed by the high-pressure pump is the main energy consumption of the whole reverse osmosis seawater desalination system.
In order to reduce the energy consumption of the high-pressure pump, a pressure conversion device is widely used. The pressure conversion device can utilize the higher pressure of the concentrated seawater discharged from the reverse osmosis component to pressurize the inlet seawater, thereby reducing the energy consumption of the high-pressure pump. In addition to this, systems have been developed which use hydrostatic pressure to provide operating pressure.
However, in the prior art, during the process of transporting the fresh water from the sea bottom to the land or the platform, external large power is still required to provide power transmission, which causes large energy consumption during the process of lifting the fresh water, and the prior art cannot continuously lift the fresh water, so that the corresponding system is urgently needed to be developed.
Disclosure of Invention
In order to solve the problems, the invention provides a diving reverse osmosis seawater desalination system for continuously lifting fresh water by using ocean temperature difference energy, which utilizes a conveyor driven by the ocean temperature difference energy to lift the fresh water and can continuously lift the fresh water, so that the whole device is stable in mechanical conveying and the conveying efficiency is improved.
Utilize the dive reverse osmosis sea water desalination of ocean difference in temperature energy to promote fresh water in succession, its characterized in that: the reverse osmosis seawater desalination device comprises a reverse osmosis seawater desalination module and a fresh water lifting module, wherein the reverse osmosis seawater desalination module specifically comprises a first filtering device, a circulating pump, a reverse osmosis membrane assembly and a closed container, the first filtering device, the circulating pump and the reverse osmosis assembly are arranged in the closed container, the first filtering device is connected to an external local seawater inlet through an external pipeline, an outlet of the first filtering device is connected with an inlet of the circulating pump, an outlet of the circulating pump is connected with an inlet of the reverse osmosis membrane assembly, a seawater outlet of the reverse osmosis membrane assembly is communicated to the outside through a second pipeline, and a fresh water outlet of the reverse osmosis membrane assembly is communicated to an inlet of an external fresh water storage tank through a third pipeline;
the fresh water lifting module is arranged in the closed shell except for the exposed pipeline, and specifically comprises a conveying pump and a plurality of conveyors arranged in parallel, each conveyor comprises a shell, an internal piston, an upper fresh water inlet, an upper fresh water outlet, a lower surface seawater inlet, a lower surface seawater outlet, a lower deep seawater inlet and a lower deep seawater outlet, the internal piston divides an inner cavity of the shell into an upper cavity and a lower cavity, an evaporator, a condenser and a working medium are further arranged in the lower cavity, the evaporator and the condenser are all arranged in a manner of being attached to the working medium, the lower surface seawater inlet, the lower surface seawater outlet and the evaporator are combined to form a communicating structure, the lower deep seawater inlet, the lower deep seawater outlet and the condenser are combined to form a communicating structure, and the upper fresh water inlet, the lower deep seawater outlet and the condenser of each conveyor are combined, The upper fresh water outlet is respectively connected with an electromagnetic control valve, the outlet of the fresh water storage box is communicated to the inlet of the delivery pump, the delivery pump is respectively communicated to the corresponding electromagnetic control valve end of the upper fresh water inlet of each conveyor through a corresponding pipeline, the corresponding electromagnetic valve end of each upper fresh water outlet is respectively connected into a fresh water delivery pipe through a pipeline, and the fresh water delivery pipe is communicated to the storage box on the sea level;
the surface seawater desalination device also comprises a surface seawater conveying pipe which is vertically arranged, the surface seawater conveying pipe is respectively connected with one end of a corresponding first electromagnetic control three-way valve through a branch, a second filtering device is arranged at a position corresponding to the depth of the reverse osmosis seawater desalination module, the output end of the second filtering device is connected with the other end of the first electromagnetic control three-way valve, the output end of the first electromagnetic control three-way valve is connected with the first end of a second electromagnetic control three-way valve, the second end and the third end of the second electromagnetic control three-way valve are respectively connected with a lower surface seawater inlet and a lower depth seawater inlet, the lower surface seawater outlet and the lower depth seawater outlet are respectively connected with the first end and the second end of a third electromagnetic control three-way valve, the third end of the third electromagnetic control three-way valve is connected with a corresponding seawater outlet branch pipe, and a corresponding heat, all the seawater outlet branch pipes are connected to the seawater outlet main pipe in a gathering manner.
It is further characterized in that:
the bottoms of the reverse osmosis seawater desalination module and the fresh water lifting module are supported on the base, so that the whole structure is stable and reliable;
the number of the conveyors is even, the plurality of the conveyors connected in parallel are in different states of evaporation-condensation cycle, the conveyors with constant number are always kept in the condensation process of filling fresh water at different moments, and the conveyors with constant number are in the evaporation process of discharging fresh water;
the fresh water inlet and outlet of the conveyor are provided with electromagnetic valves to control the flow direction of fresh water and prevent backflow, and the valve system is ensured to be opened and closed correctly through a central control system;
the inner piston of the conveyor is I-shaped and has a structure that the bottom area of the lower part is larger than that of the upper part, when the working medium is evaporated, the pressure on the bottom surface of the piston is evaporation pressure, while the pressure on the bottom surface of the working medium is increased according to a certain proportion, and the proportion is related to the ratio of the bottom area of the upper part to the bottom area of the lower part by derivation of a formula. Therefore, under the same lifting pressure, the evaporation pressure of the working medium can be lower, so that the charging pressure of the working medium is reduced, and the manufacturing cost of the conveyor is saved;
on the other hand, after the evaporation temperature of the working medium is reduced, the types of the selectable working media are increased, the design freedom degree of the conveyor is increased, and the cycle performance has larger improvement space. When the traditional piston is used, the candidate working medium evaporated under the conditions of 20-35 ℃ and 5-7 MPa is only carbon dioxide. After the piston is used, the types of selectable working media are obviously increased, so that the thermal cycle performance of the conveyor has a larger improvement space.
The surface seawater conveying pipe adopts heat preservation measures, and conveys the surface seawater to an evaporator of a conveyor, and the surface seawater is relatively stably kept in a vertical state through an anchoring system;
the fresh water conveying pipeline is arranged and fixed along the seabed;
a third filtering device is arranged at the inlet section of the surface seawater conveying pipe, so that the cleanliness of seawater is ensured;
the reverse osmosis membrane component is specifically an RO component.
After the system is adopted, fresh water generated by the reverse osmosis membrane component and temporarily stored in the fresh water storage tank is conveyed into a corresponding conveyor through a conveying pump, the conveyor conveys the filled fresh water into an onshore storage tank through a fresh water conveying pipe, surface seawater is conveyed into an evaporator in the conveyor through a surface seawater conveying pipe, the surface seawater conveying pipe and cold source deep seawater are connected through an electromagnetic control three-way valve, a heat source or a cold source is alternately conveyed into the evaporator or a condenser by controlling the opening and closing of the electromagnetic control three-way valve, outlet pipelines of the evaporator and the condenser are also connected through the electromagnetic control three-way valve, the heat source or the cold source is alternately discharged out of the conveyor by controlling the opening and closing of the electromagnetic control three-way valve, a plurality of conveyors connected in parallel are in different states of evaporation-condensation cycle, the conveyors with constant quantity are always kept in a fresh water filling process (condensation process) at different, the fresh water inlet and outlet of the conveyor are provided with electromagnetic control valves to control the flow direction of fresh water and prevent backflow. The valve system is ensured to be opened and closed correctly through a central control system; the marine temperature difference energy driven conveyor is used for lifting fresh water, and fresh water lifting can be continuously carried out, so that the whole device is stable in mechanical conveying, and the conveying efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the front view structure of the present invention;
FIG. 2 is a schematic diagram of the fresh water lift process of the conveyor of the present invention;
FIG. 3 is a schematic diagram of the fresh water collection process of the conveyor of the present invention;
the names corresponding to the sequence numbers in the figure are as follows:
the system comprises a reverse osmosis seawater desalination module 1, a fresh water lifting module 2, a first filtering device 3, a circulating pump 4, a reverse osmosis membrane assembly 5, a closed container 6, a local seawater inlet 7, a second pipeline 8, a third pipeline 9, a fresh water storage tank 10, a delivery pump 11, a conveyor 12, a shell 13, an internal piston 14, an upper fresh water inlet 15, an upper fresh water outlet 16, a lower surface seawater inlet 17, a lower surface seawater outlet 18, a lower deep seawater inlet 19, a lower deep seawater outlet 20, an upper cavity 21, a lower cavity 22, an evaporator 23, a condenser 24, a working medium 25, an electromagnetic valve 26, a fresh water delivery pipe 27, a storage tank 28, a surface seawater delivery pipe 29, a first electromagnetic control three-way valve 30, a second electromagnetic control three-way valve 31, a third electromagnetic control three-way valve 32, a seawater outlet branch pipe 33, a heat source pump 34, a seawater outlet, A third filter device 37 and a second filter device 38.
Detailed Description
Utilize the sea temperature difference can promote the dive reverse osmosis sea water desalination of fresh water in succession, see figure 1: the reverse osmosis seawater desalination device comprises a reverse osmosis seawater desalination module 1 and a fresh water lifting module 2, wherein the reverse osmosis seawater desalination module 1 specifically comprises a first filtering device 3, a circulating pump 4, a reverse osmosis membrane assembly 5 and a closed container 6, the first filtering device 3, the circulating pump 4 and the reverse osmosis assembly 5 are arranged in the closed container 6, the first filtering device 3 is connected to an external local seawater inlet 7 through an external pipeline, an outlet of the first filtering device 3 is connected with an inlet of the circulating pump 4, an outlet of the circulating pump 4 is connected with an inlet of the reverse osmosis membrane assembly 5, a seawater outlet of the reverse osmosis membrane assembly 5 is communicated to the outside through a second pipeline 8, and a fresh water outlet of the reverse osmosis membrane assembly 5 is communicated to an inlet of an external fresh water storage tank;
the fresh water lifting module 2 is arranged in a closed shell except an exposed pipeline, the fresh water lifting module 2 specifically comprises a delivery pump 11 and a plurality of conveyors 12 which are arranged in parallel, each conveyor 12 comprises a shell 13, an internal piston 14, an upper fresh water inlet 15, an upper fresh water outlet 16, a lower surface seawater inlet 17, a lower surface seawater outlet 18, a lower deep seawater inlet 19 and a lower deep seawater outlet 20, the internal piston 14 divides the inner cavity of the shell 13 into an upper cavity 21 and a lower cavity 22, an evaporator 23, a condenser 24 and a working medium 25 are also arranged in the lower cavity 22, the evaporator 23 and the condenser 24 are all arranged in a manner of being attached to the working medium 25, the lower surface seawater inlet 17, the lower surface seawater outlet 18 and the evaporator 23 are combined to form a communication structure, and the lower deep seawater inlet 19, the lower deep seawater outlet 20 and the condenser 24 are combined to form a communication, the upper fresh water inlet 15 and the upper fresh water outlet 16 of each conveyor 12 are respectively connected with an electromagnetic control valve 26, the outlet of the fresh water storage tank 10 is communicated to the inlet of the delivery pump 11, the delivery pump 11 is respectively communicated to the corresponding electromagnetic control valve 26 end of the upper fresh water inlet 15 of each conveyor 12 through a corresponding pipeline, the corresponding electromagnetic valve 26 end of each upper fresh water outlet 16 is respectively connected to a fresh water delivery pipe 27 through a pipeline, and the fresh water delivery pipe 27 is communicated to a storage tank 28 on the sea level;
the device also comprises a surface seawater delivery pipe 29 which is vertically arranged, the surface seawater delivery pipe 29 is respectively connected with one end of a corresponding first electromagnetic control three-way valve 30 through a branch, a second filtering device 38 is arranged at a corresponding depth position of the reverse osmosis seawater desalination module 1, the output end of the second filtering device 38 is connected with the other end of the first electromagnetic control three-way valve 30, the output end of the first electromagnetic control three-way valve 30 is connected with the first end of a second electromagnetic control three-way valve 31, the second end and the third end of the second electromagnetic control three-way valve 31 are respectively connected with a lower surface seawater inlet 17 and a lower depth seawater inlet 19, a lower surface seawater outlet 18 and a lower depth seawater outlet 20 are respectively connected with the first end and the second end of a third electromagnetic control three-way valve 32, the third end of the third electromagnetic control three-way valve 32 is connected with a corresponding seawater outlet branch pipe 33, and a corresponding heat source, all the seawater outlet branch pipes 33 are connected to a seawater outlet header pipe 35 in a collective manner.
The bottom parts of the reverse osmosis seawater desalination module 1 and the fresh water lifting module 2 are supported on the base 36, so that the whole structure is stable and reliable;
the number of the conveyors 12 is even, the conveyors 12 connected in parallel are in different states of evaporation-condensation cycle, the conveyors 12 in the same number are always kept in the condensation process of filling fresh water at the same time, and the conveyors 12 in the same number are in the evaporation process of discharging fresh water;
the fresh water inlet and outlet of the conveyor 12 are provided with electromagnetic valves to control the flow direction of fresh water and prevent backflow, and the valve system is ensured to be opened and closed correctly through a central control system;
the inner piston of the conveyor 12 is I-shaped, and has a structure that the bottom area of the lower part is larger than that of the upper part, when the working medium evaporates, the pressure on the bottom surface of the piston is the evaporating pressure, while the pressure on the bottom surface of the working medium is increased according to a certain proportion, and the proportion is related to the ratio of the bottom areas of the upper part and the lower part by derivation of a formula. Therefore, under the same lifting pressure, the evaporation pressure of the working medium can be lower, so that the charging pressure of the working medium is reduced, and the manufacturing cost of the conveyor is saved;
on the other hand, after the evaporation temperature of the working medium is reduced, the types of the selectable working media are increased, the design freedom degree of the conveyor is increased, and the cycle performance has larger improvement space. When the traditional piston is used, the candidate working medium evaporated under the conditions of 20-35 ℃ and 5-7 MPa is only carbon dioxide. After the piston is used, the types of selectable working media are obviously increased, as shown in table 1. In addition to the pure working fluids listed in Table 1, the non-azeotropic working fluids formed by mixing them in a certain proportion are also important candidate working fluids. The types of the selectable working media are increased, so that the thermal cycle performance of the conveyor has a larger improvement space.
TABLE 1 thermophysical properties of candidate working fluids for conveyors
In the specific implementation: the surface seawater transport pipe 29 takes heat preservation measures to send the surface seawater to the evaporator of the conveyor 12, which is relatively stably kept in a vertical state by the mooring system;
the fresh water conveying pipe 27 is arranged and fixed along the seabed;
a third filtering device 37 is arranged at the inlet section of the surface seawater conveying pipe 29 to ensure the cleanliness of seawater;
the reverse osmosis membrane module 5 is specifically an RO module.
The working principle is as follows: fresh water generated by a reverse osmosis membrane component and temporarily stored in a fresh water storage tank is conveyed into a corresponding conveyor through a conveying pump, the conveyor conveys the filled fresh water into an onshore storage tank through a fresh water conveying pipe, surface seawater is conveyed into an evaporator in the conveyor through a surface seawater conveying pipe, the surface seawater conveying pipe and cold source deep seawater are connected through an electromagnetic control three-way valve, a heat source or a cold source is alternately conveyed into the evaporator or a condenser by controlling the opening and closing of the electromagnetic control three-way valve, outlet pipelines of the evaporator and the condenser are also connected through the electromagnetic control three-way valve, the heat source or the cold source is alternately discharged out of the conveyor by controlling the opening and closing of the electromagnetic control three-way valve, a plurality of conveyors connected in parallel are in different states of evaporation-condensation circulation, the conveyors with constant quantity are always kept in a fresh water filling process (a condensation process) at different, the fresh water inlet and outlet of the conveyor are provided with electromagnetic control valves to control the flow direction of fresh water and prevent backflow. The valve system is ensured to be opened and closed correctly through a central control system; the plurality of conveyors are connected in parallel, so that the continuous and stable work of the conveying pump is realized, the mechanical efficiency is improved, and the service life is prolonged; meanwhile, the stable output of the fresh water is realized, and the production capacity of the system is increased.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. Utilize the dive reverse osmosis sea water desalination of ocean difference in temperature energy to promote fresh water in succession, its characterized in that: the reverse osmosis seawater desalination device comprises a reverse osmosis seawater desalination module and a fresh water lifting module, wherein the reverse osmosis seawater desalination module specifically comprises a first filtering device, a circulating pump, a reverse osmosis membrane assembly and a closed container, the first filtering device, the circulating pump and the reverse osmosis assembly are arranged in the closed container, the first filtering device is connected to an external local seawater inlet through an external pipeline, an outlet of the first filtering device is connected with an inlet of the circulating pump, an outlet of the circulating pump is connected with an inlet of the reverse osmosis membrane assembly, a seawater outlet of the reverse osmosis membrane assembly is communicated to the outside through a second pipeline, and a fresh water outlet of the reverse osmosis membrane assembly is communicated to an inlet of an external fresh water storage tank through a third pipeline;
the fresh water lifting module is arranged in the closed shell except for the exposed pipeline, and specifically comprises a conveying pump and a plurality of conveyors arranged in parallel, each conveyor comprises a shell, an internal piston, an upper fresh water inlet, an upper fresh water outlet, a lower surface seawater inlet, a lower surface seawater outlet, a lower deep seawater inlet and a lower deep seawater outlet, the internal piston divides an inner cavity of the shell into an upper cavity and a lower cavity, an evaporator, a condenser and a working medium are further arranged in the lower cavity, the evaporator and the condenser are all arranged in a manner of being attached to the working medium, the lower surface seawater inlet, the lower surface seawater outlet and the evaporator are combined to form a communicating structure, the lower deep seawater inlet, the lower deep seawater outlet and the condenser are combined to form a communicating structure, and the upper fresh water inlet, the lower deep seawater outlet and the condenser of each conveyor are combined, The upper fresh water outlet is respectively connected with an electromagnetic control valve, the outlet of the fresh water storage box is communicated to the inlet of the delivery pump, the delivery pump is respectively communicated to the corresponding electromagnetic control valve end of the upper fresh water inlet of each conveyor through a corresponding pipeline, the corresponding electromagnetic valve end of each upper fresh water outlet is respectively connected into a fresh water delivery pipe through a pipeline, and the fresh water delivery pipe is communicated to the storage box on the sea level;
the surface seawater desalination device also comprises a surface seawater conveying pipe which is vertically arranged, the surface seawater conveying pipe is respectively connected with one end of a corresponding first electromagnetic control three-way valve through a branch, a second filtering device is arranged at a position corresponding to the depth of the reverse osmosis seawater desalination module, the output end of the second filtering device is connected with the other end of the first electromagnetic control three-way valve, the output end of the first electromagnetic control three-way valve is connected with the first end of a second electromagnetic control three-way valve, the second end and the third end of the second electromagnetic control three-way valve are respectively connected with a lower surface seawater inlet and a lower depth seawater inlet, the lower surface seawater outlet and the lower depth seawater outlet are respectively connected with the first end and the second end of a third electromagnetic control three-way valve, the third end of the third electromagnetic control three-way valve is connected with a corresponding seawater outlet branch pipe, and a corresponding heat, all the seawater outlet branch pipes are connected to the seawater outlet main pipe in a gathering manner.
2. The submerged reverse osmosis seawater desalination system for continuously elevating fresh water by using ocean temperature difference energy as claimed in claim 1, wherein: the bottom parts of the reverse osmosis seawater desalination module and the fresh water lifting module are supported on the base.
3. The submerged reverse osmosis seawater desalination system for continuously elevating fresh water by using ocean temperature difference energy as claimed in claim 1, wherein: the number of the conveyors is even, the plurality of the conveyors connected in parallel are in different states of evaporation-condensation cycle, the conveyors with constant number are always kept in the condensation process of filling fresh water at different times, and the conveyors with constant number are in the evaporation process of discharging fresh water.
4. The submerged reverse osmosis seawater desalination system for continuously elevating fresh water by using ocean temperature difference energy as claimed in claim 1, wherein: the inner piston of the conveyor is I-shaped, and the inner piston is of a structure with the bottom area of the lower part larger than that of the upper part.
5. The submerged reverse osmosis seawater desalination system for continuously elevating fresh water by using ocean temperature difference energy as claimed in claim 1, wherein: the surface seawater delivery pipe adopts heat preservation measures, and sends surface seawater to an evaporator of a conveyor, and the surface seawater is relatively stably kept in a vertical state through an anchoring system.
6. The submerged reverse osmosis seawater desalination system for continuously elevating fresh water by using ocean temperature difference energy as claimed in claim 1, wherein: the fresh water transporting pipeline is arranged and fixed along the seabed.
7. The submerged reverse osmosis seawater desalination system for continuously elevating fresh water by using ocean temperature difference energy as claimed in claim 1, wherein: and the inlet section of the surface seawater conveying pipe is provided with a third filtering device.
8. The submerged reverse osmosis seawater desalination system for continuously elevating fresh water by using ocean temperature difference energy as claimed in claim 1, wherein: the reverse osmosis membrane component is specifically an RO component.
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| CN115159621A (en) * | 2022-06-14 | 2022-10-11 | 苏州西热节能环保技术有限公司 | Seawater desalination system utilizing ocean temperature difference |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115159621A (en) * | 2022-06-14 | 2022-10-11 | 苏州西热节能环保技术有限公司 | Seawater desalination system utilizing ocean temperature difference |
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