CN106145261B - Seawater desalination system - Google Patents
Seawater desalination system Download PDFInfo
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- CN106145261B CN106145261B CN201510141697.9A CN201510141697A CN106145261B CN 106145261 B CN106145261 B CN 106145261B CN 201510141697 A CN201510141697 A CN 201510141697A CN 106145261 B CN106145261 B CN 106145261B
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- 239000013535 sea water Substances 0.000 title claims abstract description 113
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 80
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 76
- 239000012528 membrane Substances 0.000 claims abstract description 42
- 238000005381 potential energy Methods 0.000 claims abstract description 10
- 239000013505 freshwater Substances 0.000 claims description 36
- 230000006835 compression Effects 0.000 claims description 23
- 238000007906 compression Methods 0.000 claims description 23
- 238000002360 preparation method Methods 0.000 claims description 15
- 150000003839 salts Chemical class 0.000 claims description 11
- 238000010248 power generation Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 9
- 239000008213 purified water Substances 0.000 claims description 8
- 230000000295 complement effect Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000012466 permeate Substances 0.000 claims 1
- 238000011033 desalting Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 16
- 239000012267 brine Substances 0.000 description 14
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 14
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- XZPVPNZTYPUODG-UHFFFAOYSA-M sodium;chloride;dihydrate Chemical compound O.O.[Na+].[Cl-] XZPVPNZTYPUODG-UHFFFAOYSA-M 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The application provides a sea water desalination system, comprising: the sea water desalination membrane is arranged at the bottom of a deep well with a preset depth; one end of the main water inlet pipe is connected with the seawater desalination membrane, and the other end of the main water inlet pipe extends to the wellhead of the deep well along the deep well. The sea water desalting system realizes the purpose of desalting sea water at the bottom of a well by arranging a deep well with preset depth and a sea water desalting membrane at the bottom of the well, and converting sea water potential energy with preset depth into pressure.
Description
Technical Field
The application belongs to the technical field of sea water desalination, and particularly relates to a sea water desalination system.
Background
Water is a fundamental need for life and health, and the earth has 70.8% of its area covered by water, but fresh water resources are extremely limited.
Therefore, in the face of increasingly scarce fresh water resources, there is an urgent need to provide a technique capable of desalinating sea water to obtain fresh water.
Disclosure of Invention
In view of the above, the present application provides a seawater desalination system to achieve the purpose of desalinating seawater.
In order to achieve the above purpose, the present application provides the following technical solutions:
a seawater desalination system, comprising:
the sea water desalination membrane is arranged at the bottom of a deep well with a preset depth;
one end of the main water inlet pipe is connected with the seawater desalination membrane, and the other end of the main water inlet pipe extends to the wellhead of the deep well along the deep well.
Preferably, the method further comprises: the filtering device and the plurality of hydraulic generators are sequentially arranged on the main water inlet pipe from top to bottom.
Preferably, the method further comprises: the fresh water pneumatic pump is connected with the fresh water outlet of the sea water desalination membrane, and the air compression system is connected with the air port of the fresh water pneumatic pump.
Preferably, the fresh water air pump includes:
a first one-way valve and a second one-way valve connected with a fresh water outlet of the sea water desalination membrane;
the first container is connected with the first one-way valve and is connected with the purified water preparation device through a third one-way valve;
the second container is connected with the second one-way valve and is connected with the purified water preparation device through a fourth one-way valve;
one end of the first electromagnetic reversing valve is connected with the air port of the first container, the other end of the first electromagnetic reversing valve is connected with the air outlet of the air compression system, and the first electromagnetic reversing valve is connected with the air return tank through a fifth one-way valve;
one end of the second electromagnetic reversing valve is connected with the air port of the second container, the other end of the second electromagnetic reversing valve is connected with the air outlet of the air compression system, and the second electromagnetic reversing valve is connected with the air return tank through the fifth one-way valve.
Preferably, the air compression system is a wind-solar-electricity complementary air making system, comprising:
the air outlet is connected with the air inlet of the fresh water pneumatic pump;
the photovoltaic gas making device, the wind power gas making device and the low peak electricity gas making device are respectively connected with the gas inlet of the gas storage tank;
and the pressure sensor is connected between the gas storage tank and the low-peak electric gas making device.
Preferably, the method further comprises: a concentrated water vapor pump connected with a concentrated water port of the sea water desalination membrane through a first hydraulic generator;
wherein, the gas port of the concentrated water pneumatic pump is connected with the air compression system.
Preferably, the concentrated water vapor pump includes:
a sixth check valve and a seventh check valve connected to the first hydro-generator;
the third container is connected with the sixth one-way valve and is connected with the salt chemical preparation system through the eighth one-way valve;
a fourth container connected with the seventh one-way valve and connected with the salt chemical preparation system through a ninth one-way valve;
one end of the third electromagnetic reversing valve is connected with the air port of the third container, the other end of the third electromagnetic reversing valve is connected with the air outlet of the air compression system, and the third electromagnetic reversing valve is connected with the air return tank through a fifth one-way valve;
one end of the fourth electromagnetic reversing valve is connected with the air port of the fourth container, the other end of the fourth electromagnetic reversing valve is connected with the air outlet of the air compression system, and the fourth electromagnetic reversing valve is connected with the air return tank through the fifth one-way valve.
Preferably, the method further comprises: and the low-pressure turbine power generation system is connected with the air return tank.
Preferably, the method further comprises: an elevator installed at one side of the deep well.
Preferably, the method further comprises: the switch valve is arranged at one end of the main water inlet pipe, which is far away from the sea water desalination membrane.
As can be seen from the above technical scheme, the present application provides a seawater desalination system, comprising: the sea water desalination membrane is arranged at the bottom of a deep well with a preset depth; one end of the main water inlet pipe is connected with the seawater desalination membrane, and the other end of the main water inlet pipe extends to the wellhead of the deep well along the deep well. The sea water desalting system realizes the purpose of desalting sea water at the bottom of a well by arranging a deep well with preset depth and a sea water desalting membrane at the bottom of the well, and converting sea water potential energy with preset depth into pressure.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a seawater desalination system according to a first embodiment of the present application;
fig. 2 is a schematic structural diagram of a seawater desalination membrane according to a first embodiment of the present application;
fig. 3 is a schematic structural diagram of a seawater desalination system according to a second embodiment of the present application;
fig. 4 is a schematic structural diagram of a fresh water air pump according to a third embodiment of the present application;
fig. 5 is a schematic structural diagram of a wind-solar-electricity complementary gas generating system according to a third embodiment of the present application;
FIG. 6 is a schematic structural diagram of a salt chemical preparation system according to a third embodiment of the present application;
FIG. 7 is a schematic diagram of a low pressure turbine power generation system according to a third embodiment of the present application;
fig. 8 is a schematic structural diagram of a seawater desalination system according to a third embodiment of the present application;
fig. 9 is a schematic structural diagram of a deep well equipment according to a third embodiment of the present application.
Description of the embodiments
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The application provides a seawater desalination system for realizing the purpose of desalinating seawater, which comprises the following specific schemes:
examples
Referring to fig. 1, fig. 1 is a schematic structural diagram of a seawater desalination system according to a first embodiment of the present application. The seawater desalination system comprises:
a sea water desalination membrane 102 disposed at the bottom of a deep well 101 of a predetermined depth.
Specifically, in the application, the preset depth can take the value of 800m, and the depth of more than 650m is enough without limitation, so that the pressure at the bottom of the deep well is ensured to be enough to satisfy the seawater desalination. The diameter of the deep well is generally more than 2m, and the deep well is not limited in particular and can be set according to the actual space requirement of the system. Inside the deep well 101, a sealing sleeve is required to be installed from top to bottom to protect the well wall and also to isolate water seepage from the well.
Fig. 2 is a schematic structural diagram of a seawater desalination membrane according to an embodiment of the application. Wherein seawater enters the seawater desalination membrane through a water inlet 201, fresh water enters a central tube 202 through a permeable membrane (not shown in the figure) due to the pressure converted from potential energy of the seawater and flows out through an outlet 203.
One end is connected with the sea water desalination membrane 102, and the other end extends to a main water inlet pipe 103 of a wellhead of the deep well 101 along the deep well 101.
One end of the main water inlet pipe 103 is connected with the water inlet of the sea water desalination membrane, the other end of the main water inlet pipe 103 is arranged on the pipe wall of the sealing sleeve at the wellhead of the deep well 101, the pipe wall is below the sea level, the water inlet of the main water inlet pipe 103 is fixedly arranged through the pipe wall by a sealing element, and then the water inlet extends to the deep sea through a pipeline to absorb pure sea water without pollution.
The potential energy of the seawater with the preset depth is converted into pressure, so that the seawater at the bottom of the deep well is desalted through the seawater desalination membrane. For example, when the depth of a deep well reaches 800 meters, the pressure at the bottom of the seawater of 800 meters is 8 megapascals, so that the seawater can penetrate through the seawater desalination membrane through the self potential energy pressure to complete the seawater desalination, and the purposes of energy saving and consumption reduction are achieved.
As can be seen from the above technical solution, a first embodiment of the present application provides a seawater desalination system, including: the sea water desalination membrane is arranged at the bottom of a deep well with a preset depth; one end of the main water inlet pipe is connected with the seawater desalination membrane, and the other end of the main water inlet pipe extends to the wellhead of the deep well along the deep well. The sea water desalting system realizes the purpose of desalting sea water at the bottom of a well by arranging a deep well with preset depth and a sea water desalting membrane at the bottom of the well, and converting sea water potential energy with preset depth into pressure.
Examples
On the basis of the first embodiment, the second embodiment of the application provides another sea water desalination system. As shown in fig. 3, fig. 3 is a schematic structural diagram of a seawater desalination system according to a second embodiment of the present application. The seawater desalination system comprises:
a sea water desalination membrane 302 disposed at the bottom of a deep well 301 of a predetermined depth.
One end is connected with the sea water desalination membrane 302, and the other end extends to a main water inlet pipe 303 of a wellhead of the deep well 301 along the deep well 301.
A filtering device 304 and a plurality of hydraulic generators 305 which are sequentially arranged on the main water inlet pipe 303 from top to bottom.
Wherein, the filter device comprises a multi-medium filter and a precision filter from top to bottom. The seawater entering from the main water inlet pipe is filtered by the multi-medium filter to remove large particle impurities in the seawater, then the large particle impurities are discharged into the precise filter through the main water inlet pipe pipeline, and the seawater is filtered by the precise filter to remove particles larger than 5 microns in the seawater so as to meet the water inlet requirement of subsequent treatment. The seawater coming out of the precise filter is discharged through the main water inlet pipe, sequentially enters the plurality of hydraulic generators with huge potential energy, and is used for being combined into a power grid through a cable after being impacted by the seawater to rotate for power generation. After passing through the plurality of hydraulic generators, the seawater continuously leaks down into a seawater inlet of a seawater desalination membrane arranged at the bottom of the well through a pipeline, and the pressure of seawater at the bottom of the well reaches 8 megapascals because the depth of the deep well from the well mouth to the bottom of the well is about 800 meters, so that the seawater can physically separate salt from water through the seawater desalination membrane by self potential energy pressure, and the seawater desalination is completed.
Specifically, the number of the hydraulic generators may be set to 4, which is not limited herein.
In addition, the seawater desalination system may further comprise an elevator 306 installed at one side of the deep well 301 and an on-off valve 307 provided at one end of the main water inlet pipe 303 remote from the seawater desalination membrane 302.
The small elevator is installed on one side of the deep well to facilitate the constructor to perform the well descending construction, and meanwhile, when the equipment is out of order, the system can be stopped by switching off the switch valve 307, and the constructor is further dispatched to perform the overhaul and the construction.
According to the technical scheme, the sea water desalination system provided by the second embodiment of the application realizes sea water desalination by utilizing the potential energy of sea water, generates power by utilizing the impact of sea water leakage, saves energy, reduces consumption and fully develops and utilizes natural energy.
Examples
On the basis of the two embodiments, the application provides another sea water desalination system. The seawater desalination system comprises: the seawater desalination system of any of the first or second embodiments, further comprising: a fresh water pneumatic pump connected with the fresh water outlet of the sea water desalination membrane and an air compression system connected with the air port of the fresh water pneumatic pump.
Fig. 4 is a schematic structural diagram of a fresh water pneumatic pump according to a third embodiment of the present application, as shown in fig. 4. The fresh water air pump comprises:
a first check valve 401 and a second check valve 402 connected to the fresh water outlet of the desalination membrane;
a first container 404 connected to the first check valve 401 and connected to the purified water preparing device through a third check valve 403;
a second container 406 connected to the second check valve 402 and connected to the purified water preparing apparatus through a fourth check valve 405;
a first electromagnetic directional valve 408 having one end connected to the air inlet of the first container 404 and the other end connected to the air outlet of the air compression system and connected to the return air tank through a fifth check valve;
one end of the second electromagnetic directional valve 409 is connected with the air port of the second container 406, and the other end of the second electromagnetic directional valve is connected with the air outlet of the air compression system, and is connected with the air return tank through a fifth one-way valve.
Fresh water flows into the first container and the second container through the first check valve and the second check valve, the air compression system discharges compressed air into the first container and the second container, and the fresh water in the containers flows into the purified water preparation device by extrusion.
Specifically, compressed air in the air compression system is connected into an air inlet pipeline of the fresh water pneumatic pump through a one-way valve, an air transmission pipeline and two electromagnetic directional valves, fresh water filtered by the sea water desalination membrane enters a container of the fresh water pneumatic pump through the pipeline and the two water inlet one-way valves, and then a PLC controls the opening and closing of the two electromagnetic directional valves through a control cable to complete air supply and air release of the pneumatic pump. When the compressed air is supplied, the compressed air can pump fresh water to a high position through the water outlet pipelines of the two water outlet check valves, and when the compressed air is discharged, the fresh water enters the pump body through the two water inlet check valves, so that the process is repeated, and the pneumatic water pumping can be completed.
Specifically, the air compression system of the application can be a wind-solar-electricity complementary air making system. As shown in fig. 5, fig. 5 is a schematic structural diagram of a wind-solar-electricity complementary gas generating system according to a third embodiment of the present application, where the wind-solar-electricity complementary gas generating system includes:
the air outlet is connected with the air storage tank 501 of the first container and the second container of the fresh water pneumatic pump through the first electromagnetic directional valve and the second electromagnetic directional valve respectively.
The air storage tank is used for storing air compressed by the air making device and discharging the compressed air into the fresh water pneumatic pump to extrude the fresh water to be discharged into the purified water preparation device.
A photovoltaic gas generator 502, a wind generator 503 and a low peak electricity generator 504 which are respectively connected with the gas inlet of the gas storage tank 501.
A pressure sensor 505 connected between the air tank 501 and the low peak electric power generating apparatus 504.
Specifically, in the present application, the photovoltaic gas generating apparatus 502 includes: a solar panel 5021 and an air compressor 5023 connected thereto by a cable 5022. The solar panel 5021 converts solar energy into electric energy, directly drives the air compressor 5023 through the cable 5022 to prepare compressed air, and discharges the air into the air storage tank 501 through the check valve 5024 and the air pipe.
The wind turbine air generator 503 includes: an air compressor 5031 and a wind turbine 5032. Wind turbine 5032 directly drives air compressor 5031 to produce compressed air which is discharged into air storage tank 501 through check valve 5033 and air pipe.
The low peak power gas generating apparatus 504 is designed to be used for a standby without the sun and without wind. The device is controlled by a pressure sensor 505 arranged on a gas storage tank 501, when the compressed air stored in the gas storage tank 501 is lower than a set pressure, the pressure sensor 505 outputs a signal to a PLC control system 506 through a control line, the PLC control system 506 is connected with an alternating current contactor 5041 through the control line, the low peak electricity 5042 can be connected with an air compressor 5043 through a cable to prepare the compressed air, and then the compressed air is filled into the gas storage tank 501 through a one-way valve 5044 and an air pipe to supplement the pressure. Wherein the low peak power 5042 also powers the PLC via a cable.
The seawater desalination system may further comprise: and a concentrated water pneumatic pump connected with a concentrated water port of the seawater desalination membrane through a first hydraulic generator. The basic structure of the concentrated water pneumatic pump is the same as that of the fresh water pneumatic pump, and the air port of the concentrated water pneumatic pump is also connected with the air compression system.
Specifically, the dense water vapor pump includes:
a sixth check valve and a seventh check valve connected to the first hydro-generator.
The discharge pressure of the strong brine water outlet of the sea water desalination membrane also reaches 8 megapascals, so that the hydraulic generator can be completely driven to generate power to achieve the purpose of recycling residual pressure, and at least 5 hydraulic generators are integrated into a power grid through a cable after generating power to fulfill the purpose of generating power, and further, the electric generator can also provide power for a low-peak electric gas generating device.
And the third container is connected with the sixth one-way valve and is connected with the salt chemical preparation system through the eighth one-way valve.
Wherein, salt chemical industry preparation system is as shown in fig. 6, includes: an electronic scale remover 601, an uncrystallization spray atomizer 602 and a salt deep processing device 603.
The electronic scale remover is characterized in that an electromagnetic field is generated by the device, water molecules are in a high-speed motion state under the action of the electromagnetic field, and calcium and magnesium ions in water are in a motion state and cannot be combined to form scale, so that the purpose of preventing scaling is achieved. The strong brine non-crystallization spray atomizer can further atomize the strong brine, after the strong brine is atomized, atomized liquid drops are sprayed out of the atomizing head, and in the process of dropping the liquid drops, the atomized liquid drops are fully contacted with surrounding air, and wind energy and solar energy are used for further concentrating the strong brine, so that the airing process and time are shortened, and guarantee is provided for subsequent deep processing of the strong brine. The concentrated water is atomized and concentrated through the concentrated brine electronic scale remover and the concentrated brine non-crystallization spray atomizer and then is conveyed into a concentrated brine deep processing device for further deep processing, and the concentrated brine potassium extraction, bromine extraction and magnesium extraction are all mature technologies and are not repeated here.
A fourth container connected with the seventh one-way valve and the salt chemical preparation system through a ninth one-way valve;
one end of the third electromagnetic reversing valve is connected with the air port of the third container, the other end of the third electromagnetic reversing valve is connected with the air outlet of the air compression system, and the third electromagnetic reversing valve is connected with the air return tank through a fifth one-way valve;
one end of the fourth electromagnetic reversing valve is connected with the air port of the fourth container, the other end of the fourth electromagnetic reversing valve is connected with the air outlet of the air compression system, and the fourth electromagnetic reversing valve is connected with the air return tank through a fifth one-way valve.
Specifically, compressed air in the air storage tank is connected into an air inlet pipeline of the concentrated water pneumatic pump through a one-way valve, an air conveying pipeline and two electromagnetic directional valves, high-pressure concentrated brine discharged by the seawater desalination membrane drives the hydraulic generator to generate power, the high-pressure concentrated brine enters the concentrated water pneumatic pump through the pipeline and the two water inlet one-way valves, then the PLC controls the opening and closing of the two electromagnetic directional valves through a control cable to complete air supply and air release of the pneumatic pump, during air supply, the compressed air can pump the concentrated brine to a high position through an air outlet pipeline of the two water outlet one-way valves, during air release, the concentrated brine enters the pump body through the two water inlet one-way valves, so that the water is repeatedly pumped to a high position by the concentrated water pneumatic pump, and then the concentrated brine enters the salt chemical preparation system through an air outlet pipeline.
The seawater desalination system may further comprise: and the low-pressure turbine power generation system is connected with the return air tank. Fig. 7 is a schematic structural diagram of a low-pressure turbine power generation system according to a third embodiment of the present application. Specifically, compressed air with certain pressure discharged from the fresh water pneumatic pump and the concentrated water pneumatic pump is filled into an air return tank through respective air return pipelines and one-way valves, the air return tank is connected with a low-pressure turbine power generation system 703 through a pressure regulating valve 701 and the one-way valve 702 in sequence, and gas in the air return tank enters the low-pressure turbine through an air pipe to drive the low-pressure turbine to rotate, so that a generator is driven to generate power, and the purposes of recycling residual pressure, saving energy and reducing consumption are achieved.
The connection relationship between the above parts may be shown in fig. 8, and fig. 8 is a schematic structural diagram of a seawater desalination system according to a third embodiment of the present application, where the system includes all the above components, which will not be described in detail herein. Fig. 8 is intended to more intuitively show the connection relation between the parts of the sea water desalination system in this embodiment, and a detailed overall view of equipment in a specific deep well is shown in fig. 9, and fig. 9 shows more clearly the connection relation between the specific equipment in the deep well shown in fig. 8 and the equipment in the desalination system.
The air flow in the application is required to pass through the vent pipe, the water flow in the application is required to pass through the water pipe, the materials of the vent pipe and the water pipe are not limited in the application, and the air flow and the water pipe can be selected according to actual needs.
The wind-solar-electricity complementary pneumatic coastal deep well sea water desalination power generation system provided by the embodiment of the application utilizes natural energy to the greatest extent and greatly reduces sea water desalination cost. The scheme is also suitable for all places with water sources, such as inland rivers, lakes and poises, and the fresh water purification and filtration and power generation are performed in the same way so as to save energy, reduce emission and reduce cost.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A seawater desalination system, comprising:
the sea water desalination membrane is arranged at the bottom of a deep well with a preset depth; the preset depth is greater than 650 m;
one end of the main water inlet pipe is connected with the seawater desalination membrane, and the other end of the main water inlet pipe extends to a wellhead of the deep well along the deep well so as to convert self potential energy of seawater entering through the main water inlet pipe into pressure to permeate the seawater desalination membrane, thereby completing seawater desalination;
a fresh water pneumatic pump connected with the fresh water outlet of the sea water desalination membrane and an air compression system connected with the air port of the fresh water pneumatic pump;
the freshwater pneumatic pump comprises:
a first one-way valve and a second one-way valve connected with a fresh water outlet of the sea water desalination membrane;
the first container is connected with the first one-way valve and is connected with the purified water preparation device through a third one-way valve;
the second container is connected with the second one-way valve and is connected with the purified water preparation device through a fourth one-way valve;
one end of the first electromagnetic reversing valve is connected with the air port of the first container, the other end of the first electromagnetic reversing valve is connected with the air outlet of the air compression system, and the first electromagnetic reversing valve is connected with the air return tank through a fifth one-way valve;
one end of the second electromagnetic reversing valve is connected with the air port of the second container, the other end of the second electromagnetic reversing valve is connected with the air outlet of the air compression system, and the second electromagnetic reversing valve is connected with the air return tank through the fifth one-way valve.
2. The seawater desalination system of claim 1, further comprising: the filtering device and the plurality of hydraulic generators are sequentially arranged on the main water inlet pipe from top to bottom.
3. The seawater desalination system of claim 1, wherein the air compression system is a wind-solar-electric complementary air generation system, comprising:
the air outlet is connected with the air inlet of the fresh water pneumatic pump;
the photovoltaic gas making device, the wind power gas making device and the low peak electricity gas making device are respectively connected with the gas inlet of the gas storage tank;
and the pressure sensor is connected between the gas storage tank and the low-peak electric gas making device.
4. A seawater desalination system as claimed in claim 2, further comprising: a concentrated water vapor pump connected with a concentrated water port of the sea water desalination membrane through a first hydraulic generator;
wherein, the gas port of the concentrated water pneumatic pump is connected with the air compression system.
5. The seawater desalination system of claim 4, wherein the concentrated water pneumatic pump comprises:
a sixth check valve and a seventh check valve connected to the first hydro-generator;
the third container is connected with the sixth one-way valve and is connected with the salt chemical preparation system through the eighth one-way valve;
a fourth container connected with the seventh one-way valve and connected with the salt chemical preparation system through a ninth one-way valve;
one end of the third electromagnetic reversing valve is connected with the air port of the third container, the other end of the third electromagnetic reversing valve is connected with the air outlet of the air compression system, and the third electromagnetic reversing valve is connected with the air return tank through a fifth one-way valve;
one end of the fourth electromagnetic reversing valve is connected with the air port of the fourth container, the other end of the fourth electromagnetic reversing valve is connected with the air outlet of the air compression system, and the fourth electromagnetic reversing valve is connected with the air return tank through the fifth one-way valve.
6. The seawater desalination system of claim 1, further comprising: and the low-pressure turbine power generation system is connected with the air return tank.
7. The seawater desalination system of claim 1, further comprising: an elevator installed at one side of the deep well.
8. The system of claim 1, further comprising: the switch valve is arranged at one end of the main water inlet pipe, which is far away from the sea water desalination membrane.
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