CN214299715U - Diving reverse osmosis seawater desalination system utilizing ocean temperature difference energy - Google Patents
Diving reverse osmosis seawater desalination system utilizing ocean temperature difference energy Download PDFInfo
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- CN214299715U CN214299715U CN202022995528.0U CN202022995528U CN214299715U CN 214299715 U CN214299715 U CN 214299715U CN 202022995528 U CN202022995528 U CN 202022995528U CN 214299715 U CN214299715 U CN 214299715U
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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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Abstract
The utility model provides an utilize dive reverse osmosis sea water desalination of ocean thermal energy utilizes deep sea hydrostatic pressure to provide the operating pressure of reverse osmosis subassembly, utilizes the difference in temperature energy driven conveyer to promote deep sea fresh water to the sea level to accomplish sea water desalination and transmission course, and reduce traditional sea water desalination's power consumption. A circulating pump, a reverse osmosis membrane assembly, a delivery pump, a heat source pump and a conveyor are arranged in the closed container, an inlet of the circulating pump is connected with a seawater inlet pipeline at the depth, an outlet of the circulating pump is connected to an inlet of the reverse osmosis membrane assembly, a seawater outlet of the reverse osmosis membrane assembly is communicated to the outside of the closed container through a seawater discharging pipe, a fresh water outlet of the reverse osmosis membrane assembly is connected to a fresh water storage tank, and an outlet of the fresh water storage tank is connected to an inlet of the delivery pump.
Description
Technical Field
The utility model relates to a technical field of sea water desalination specifically is an utilize dive reverse osmosis sea water desalination of ocean thermal 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.
Disclosure of Invention
To the above problem, the utility model provides an utilize dive reverse osmosis sea water desalination of ocean thermal energy utilizes deep sea hydrostatic pressure to provide the operating pressure of reverse osmosis subassembly, utilizes the driven conveyer of thermal energy to promote the deep sea fresh water to the sea level to accomplish sea water desalination and transmission course, and reduce traditional sea water desalination's power consumption.
Utilize dive reverse osmosis sea water desalination of ocean thermal energy, its characterized in that: the device comprises a closed container, wherein a circulating pump, a reverse osmosis membrane assembly, a delivery pump, a heat source pump and a conveyor are arranged in the closed container, an inlet of the circulating pump is connected with a seawater inlet pipeline at the depth, an outlet of the circulating pump is connected to an inlet of the reverse osmosis membrane assembly, a seawater outlet of the reverse osmosis membrane assembly is communicated to the outside of the closed container through a seawater discharge pipe, a fresh water outlet of the reverse osmosis membrane assembly is connected to a fresh water storage tank, and an outlet of the fresh water storage tank is connected to an inlet of the delivery pump; the 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, wherein 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 also arranged in the lower cavity, the evaporator and the condenser are 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, the upper fresh water inlet and the upper fresh water outlet of the conveyor are respectively connected with an electromagnetic control valve, an outlet of the conveyor is communicated with a corresponding electromagnetic control valve end of the upper fresh water inlet of the conveyor, and the corresponding electromagnetic valve ends of the upper fresh water outlet are respectively connected into a fresh water conveying pipe through pipelines, the fresh water delivery pipe is communicated to the storage box on the sea level;
the surface seawater heat pump system is characterized by further comprising surface seawater conveying pipes which are vertically arranged, the surface seawater conveying pipes are connected to a lower surface seawater inlet after being connected into corresponding first electromagnetic valves, a cold source inlet pipeline is connected to a lower deep seawater inlet after being connected with second electromagnetic valves, a lower surface seawater outlet and a lower deep seawater outlet are respectively connected to a first end and a second end of a third electromagnetic control three-way valve, a third end of the third electromagnetic control three-way valve is connected into corresponding seawater outlet pipelines, and a heat source pump is arranged in a section, located in the closed container, of the seawater outlet pipeline.
It is further characterized in that:
the bottom of the closed container is supported on a base which is fixedly arranged on the seabed, and the base is made of salt-resistant concrete, so that the stability and reliability of the whole structure position are ensured;
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 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;
the surface seawater conveying pipe, the circulating pump and the inlet section of the cold source inlet pipeline are all provided with a filtering device, so that the cleanliness of seawater is ensured;
the reverse osmosis membrane component is specifically an RO component.
After the system is adopted, reverse osmosis is a reverse process of osmosis and is a membrane separation operation for separating a solvent from a solution by taking pressure difference as power. The pressure difference required by different solutions is different, the pressure difference required by seawater reverse osmosis is 5.5 MPa-7.0 MPa, the reverse osmosis membrane is placed at a sufficient depth by the system, and the self pressure of the fed seawater can meet the requirements of the reverse osmosis membrane assembly. Therefore, a high-pressure pump in the traditional reverse osmosis system can be omitted, the energy consumption of the system is greatly reduced, a closed container is placed on the seabed which is near to the shore and has the depth of 550-700 m, a fresh water lifting subsystem is used for conveying fresh water to the sea level, a conveyor conveys the filled fresh water into a storage tank on the shore 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 through opening and closing of a control electromagnetic 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 through opening and closing of the electromagnetic control electromagnetic valve, and the processes are alternately circulated, so that the fresh water is continuously conveyed to the sea level; the deep sea fresh water is lifted to the sea level by the conveyor driven by the temperature difference energy, so that the processes of sea water desalination and transmission are completed, and the electric energy consumption of the traditional sea water desalination system is reduced.
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 lifting process of the conveyor of the present invention;
FIG. 3 is a schematic diagram of the fresh water collecting process of the conveyor of the present invention;
the names corresponding to the sequence numbers in the figure are as follows:
the device comprises a closed container 1, a circulating pump 2, a reverse osmosis membrane assembly 3, a conveying pump 4, a heat source pump 5, a conveyor 6, a seawater inlet pipeline 7, a seawater discharge pipe 8, a fresh water storage tank 9, a first electromagnetic valve 10, a shell 11, an internal piston 12, an upper fresh water inlet 13, an upper fresh water outlet 14, a lower surface seawater inlet 15, a lower surface seawater outlet 16, a lower deep seawater inlet 17, a lower deep seawater outlet 18, an upper cavity 19, a lower cavity 20, an evaporator 21, a condenser 22, a working medium 23, a cold source inlet pipeline 24, a second electromagnetic valve 25, a third electromagnetic control three-way valve 26, a seawater outlet pipeline 27, a filtering device 28, a base 29, a fresh water conveying pipe 30, a surface seawater conveying pipe 31 and an electromagnetic control valve 32.
Detailed Description
The diving reverse osmosis seawater desalination system using ocean temperature difference energy is shown in figures 1-3: the device comprises a closed container 1, wherein a circulating pump 2, a reverse osmosis membrane component 3, a delivery pump 4, a heat source pump 5 and a conveyor 6 are arranged in the closed container 1, an inlet of the circulating pump 2 is connected with a seawater inlet pipeline 7 at the depth, an outlet of the circulating pump 2 is connected to an inlet of the reverse osmosis membrane component 3, a seawater outlet of the reverse osmosis membrane component 3 is communicated to the outside of the closed container 1 through a seawater discharging pipe 8, a fresh water outlet of the reverse osmosis membrane component 3 is connected to a fresh water storage tank 9, and an outlet of the fresh water storage tank 9 is connected to an inlet of the delivery pump 4; the conveyor 6 comprises a shell 11, an internal piston 12, an upper fresh water inlet 13, an upper fresh water outlet 14, a lower surface seawater inlet 15, a lower surface seawater outlet 16, a lower deep seawater inlet 17 and a lower deep seawater outlet 18, wherein the internal piston 12 divides the inner cavity of the shell into an upper cavity 19 and a lower cavity 20, an evaporator 21, a condenser 22 and a working medium 23 are further arranged in the lower cavity 20, the evaporator 21 and the condenser 22 are both arranged in a manner of being attached to the working medium 23, the lower surface seawater inlet 15, the lower surface seawater outlet 16 and the evaporator 21 are combined to form a communicating structure, the lower deep seawater inlet 17, the lower deep seawater outlet 18 and the condenser 22 are combined to form a communicating structure, the upper fresh water inlet 13 and the upper fresh water outlet 14 of the conveyor 6 are respectively connected with an electromagnetic control valve 32, and the outlet of a conveying pump 14 is communicated to the corresponding electromagnetic control valve end of the upper fresh water inlet 13 of the conveyor 6, the corresponding electromagnetic valve ends of the upper fresh water outlet 14 are respectively connected into a fresh water delivery pipe 30 through pipelines, and the fresh water delivery pipe 30 is communicated to the storage tank 21 on the sea level;
the surface seawater heat pump system further comprises a surface seawater conveying pipe 31 which is vertically arranged, the surface seawater conveying pipe 31 is connected to a lower surface seawater inlet 15 after being connected to a corresponding first electromagnetic valve 10, a cold source inlet pipeline 24 is connected to a second electromagnetic valve 25 and then is connected to a lower deep seawater inlet 17, a lower surface seawater outlet 16 and a lower deep seawater outlet 18 are respectively connected to a first end and a second end of a third electromagnetic control three-way valve 26, a third end of the third electromagnetic control three-way valve 26 is connected to a corresponding seawater outlet pipeline 27, a section of the seawater outlet pipeline 27, which is located in the closed container 1, is provided with a heat source pump 5, the heat source pump 5 is located behind an outlet of a condenser 22 of a conveyer evaporator 21, and the heat source pump 5 alternately sends a heat source (surface seawater) and a cold source (local seawater) into the conveyer to overcome pressure loss in the process.
In another embodiment, the surface seawater transport pipe 31 and the cold source inlet pipeline 24 are respectively connected to the lower surface seawater inlet 15 and the lower depth seawater inlet 17 through an electromagnetic control four-way valve, so as to ensure a simple and reliable structure.
The bottom of the closed container 1 is supported on a base 29, and the base 29 is fixedly arranged on the seabed, so that the whole structure is stable and reliable;
the fresh water inlet and outlet of the conveyor 6 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 surface seawater transport pipe 31 takes heat preservation measures to send the surface seawater to the evaporator of the conveyor 6, and the surface seawater is relatively stably kept in a vertical state through the anchoring system;
the fresh water delivery pipeline 20 is deployed and secured along the seabed;
the surface seawater conveying pipe 31, the circulating pump 2 and the inlet section of the cold source inlet pipeline 24 are respectively provided with a filtering device 28, so that the cleanliness of seawater is ensured;
the reverse osmosis membrane module 3 is specifically an RO module;
the working medium 23 of the conveyor 6 is in particular carbon dioxide.
The working principle is as follows: reverse osmosis is the reverse process of osmosis, a membrane separation operation that separates a solvent from a solution using a pressure differential as a motive force. The pressure difference required by different solutions is different, the pressure difference required by seawater reverse osmosis is 5.5 MPa-7.0 MPa, the reverse osmosis membrane is placed at a sufficient depth by the system, and the self pressure of the fed seawater can meet the requirements of the reverse osmosis membrane assembly. Therefore, a high-pressure pump in the traditional reverse osmosis system can be omitted, the energy consumption of the system is greatly reduced, a closed container is placed on the seabed which is near to the shore and has the depth of 550-700 m, a fresh water lifting subsystem is used for conveying fresh water to the sea level, a conveyor conveys the filled fresh water into a storage tank on the shore 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 to the conveyor through an electromagnetic 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 valve, outlet pipelines of the evaporator and the condenser are connected through an 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 valve, and the processes are alternately circulated, so that the fresh water is continuously conveyed to the sea level; the deep sea fresh water is lifted to the sea level by the conveyor driven by the temperature difference energy, so that the processes of sea water desalination and transmission are completed, and the electric energy consumption of the traditional sea water desalination system is reduced.
The beneficial effects are as follows:
1. improve the source of heat source needed by the conveyor
In the prior art, the heat source is strong brine discharged by the RO component 20, and the heat source of the system is surface seawater. After improvement, the heat source flow of the conveyor can not be limited by the strong brine any more, so that the power of the conveyor can be effectively improved, and more degrees of freedom exist in the system design stage.
2. Improves the source of the feed seawater
In the prior art, the feeding seawater is surface seawater, the feeding seawater of the system is deep sea local seawater, the quality of the deep sea seawater is superior to that of the surface seawater, the system can reduce the maintenance and replacement frequency of the filtering device and the RO assembly, prolong the service life of the system and reduce the operation and maintenance cost of the system.
3. Improving the structural stability of the system
The system is fixed on a floating platform in the prior art, and is fixed on a seabed base, so that the system is more stable in structure and more beneficial to long-term operation of the system in a complex environment.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. 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 (6)
1. Utilize dive reverse osmosis sea water desalination of ocean thermal energy, its characterized in that: the device comprises a closed container, wherein a circulating pump, a reverse osmosis membrane assembly, a delivery pump, a heat source pump and a conveyor are arranged in the closed container, an inlet of the circulating pump is connected with a seawater inlet pipeline at the depth, an outlet of the circulating pump is connected to an inlet of the reverse osmosis membrane assembly, a seawater outlet of the reverse osmosis membrane assembly is communicated to the outside of the closed container through a seawater discharge pipe, a fresh water outlet of the reverse osmosis membrane assembly is connected to a fresh water storage tank, and an outlet of the fresh water storage tank is connected to an inlet of the delivery pump; the 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, wherein 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 also arranged in the lower cavity, the evaporator and the condenser are 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, the upper fresh water inlet and the upper fresh water outlet of the conveyor are respectively connected with an electromagnetic control valve, an outlet of the conveyor is communicated with a corresponding electromagnetic control valve end of the upper fresh water inlet of the conveyor, and the corresponding electromagnetic valve ends of the upper fresh water outlet are respectively connected into a fresh water conveying pipe through pipelines, the fresh water delivery pipe is communicated to the storage box on the sea level;
the surface seawater heat pump system is characterized by further comprising surface seawater conveying pipes which are vertically arranged, the surface seawater conveying pipes are connected to a lower surface seawater inlet after being connected into corresponding first electromagnetic valves, a cold source inlet pipeline is connected to a lower deep seawater inlet after being connected with second electromagnetic valves, a lower surface seawater outlet and a lower deep seawater outlet are respectively connected to a first end and a second end of a third electromagnetic control three-way valve, a third end of the third electromagnetic control three-way valve is connected into corresponding seawater outlet pipelines, and a heat source pump is arranged in a section, located in the closed container, of the seawater outlet pipeline.
2. The submersible reverse osmosis seawater desalination system using ocean thermal energy as claimed in claim 1, wherein: the bottom of the closed container is supported on a base which is fixedly arranged on the seabed, and the base is made of salt-resistant concrete.
3. The submersible reverse osmosis seawater desalination system using ocean thermal 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.
4. The submersible reverse osmosis seawater desalination system using ocean thermal energy as claimed in claim 1, wherein: the fresh water transporting pipeline is arranged and fixed along the seabed.
5. The submersible reverse osmosis seawater desalination system using ocean thermal energy as claimed in claim 1, wherein: and the surface seawater conveying pipe, the circulating pump and the inlet section of the cold source inlet pipeline are uniformly provided with a filtering device.
6. The submersible reverse osmosis seawater desalination system using ocean thermal energy as claimed in claim 1, wherein: the reverse osmosis membrane component is specifically an RO component.
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