CN209791298U - deep sea reverse osmosis seawater desalination device - Google Patents
deep sea reverse osmosis seawater desalination device Download PDFInfo
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- CN209791298U CN209791298U CN201920174312.2U CN201920174312U CN209791298U CN 209791298 U CN209791298 U CN 209791298U CN 201920174312 U CN201920174312 U CN 201920174312U CN 209791298 U CN209791298 U CN 209791298U
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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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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
the utility model relates to a deep sea reverse osmosis seawater desalination device, which is characterized in that a lifting device and a fresh water storage water tank are arranged on a semi-submersible type ocean platform; the device body is arranged in an outer frame, and the outer frame is connected with a lifting device through a sling; the device body is immersed in seawater along with the outer frame and can lift along with the sling; the filter box of the device body is communicated with a seawater inlet main pipeline; the filter box, the water inlet pump, the heating device and the reverse osmosis membrane element are sequentially connected; the reverse osmosis membrane element is divided into three branches, wherein the first branch is communicated with the fresh water tank, the second branch is communicated with the concentrated seawater discharge pipeline, and the third branch is communicated with the resorption water tank; the fresh water tank is connected with an air pipe, and the air pipe is communicated with the atmosphere; the fresh water tank is also connected with the fresh water storage tank through a high-pressure pump and a fresh water conveying pipeline. The utility model solves the problem of difficult maintenance and cleaning caused by deep sea placement; the problems of low water yield, high water inlet pressure requirement caused by low seawater temperature, increased membrane element count and increased cost caused by the low seawater temperature are solved.
Description
Technical Field
The utility model relates to a sea water desalination device, concretely relates to deep sea reverse osmosis sea water desalination device.
Background
the deep sea reverse osmosis seawater desalination device is placed in deep sea, and seawater permeates through the reverse osmosis membrane to produce fresh water by utilizing the natural hydrostatic pressure of the deep sea, so that the energy consumption is greatly reduced. Meanwhile, because the deep sea water is very clean, the water can be produced without pretreatment or rough filtration, and the pollution possibility of the membrane is reduced due to the cleanness of the inlet water. And because the water inlet high-pressure pump is saved, the problems that the integral performance of the membrane system is reduced and the service life of the membrane system is prolonged due to the pulsating pressure wave generated by the vibration of the water inlet high-pressure pump are solved, and the device is placed in deep sea and has the advantages of noise isolation and the like, so that the seawater desalination technology is low in energy consumption and environment-friendly.
the existing deep sea reverse osmosis seawater desalination device has the following problems:
1) difficulty in maintenance and cleaning when placed in deep sea;
2) The low temperature of the deep sea water causes the reduction of the productivity of the device: in the depth of about 500 meters in deep sea, the water temperature is lower than 10 ℃, the working performance of the reverse osmosis membrane has great correlation with the inlet water temperature, and the water yield flux of the membrane system and the water temperature are basically in a direct proportion relation in a certain temperature range under constant other conditions, so that the low temperature of the deep sea water can cause the increase of the inlet water pressure and the membrane element count required by the deep sea water desalination device under the same water yield requirement, thereby increasing the cost;
3) the deep sea reverse osmosis device discharges high salinity concentrated seawater under water, which may affect an inlet seawater flow field and cause the inlet salinity to increase, further affect the salt content of produced water and bring bad influence to the operation of the device, and simultaneously, as the deep sea seawater enters the reverse osmosis device to produce fresh water, the pressure of concentrated brine at a drain outlet is lower than that of external seawater, so that the concentrated water needs to be discharged by the pressurization assistance of a concentrated water discharge pump, the distance between a water outlet and the water inlet needs to be kept for preventing the influence of the discharged water on the inlet water flow field, if the vertical distance between the water outlet and the water inlet is increased, the water outlet faces higher external water pressure, and the energy consumption requirement on the concentrated water discharge pump is also increased;
4) The high pressure environment in deep sea also puts strict requirements on the pressure resistance of the device material, but the cost is greatly increased by designing and manufacturing a large-volume high-pressure-resistant container.
SUMMERY OF THE UTILITY MODEL
the utility model aims at providing a deep sea reverse osmosis seawater desalination device, which monitors and controls the working state of a desalination system, ensures that each operation parameter of a membrane system is in the operation condition range, meets the requirements of highest recovery rate, maximum flux, minimum concentrated water flow and highest inflow flow, avoids generating back pressure, reduces sewage blockage and avoids mechanical damage of membrane elements; the problem of difficulty in maintenance and cleaning caused by deep sea placement of the device is solved; the problems of low water yield, high water inlet pressure requirement and increase of the number of required membrane elements caused by low temperature of deep sea seawater and the problem of cost increase caused by low temperature of deep sea seawater faced by a deep sea reverse osmosis seawater desalination device are solved; the problem that the concentrated water discharge of the desalination device can influence the flow field of a seawater inlet of the device is solved; the problem of the effect that the bigger vertical distance between outlet and water inlet is more favorable to getting rid of the dense water to intaking, but can increase the energy consumption demand to the dense water drain pump because of the grow of outlet external sea water pressure simultaneously and be unfavorable for reducing the contradiction of energy consumption is solved.
The utility model adopts the following technical proposal:
A deep sea reverse osmosis seawater desalination device comprises a lifting device 6 and a fresh water storage water tank 8 which are arranged on a semi-submersible type ocean platform; the device body is arranged in an outer frame 11, and the outer frame 11 is connected with the lifting device 6 through a sling 9; the device body is immersed in seawater along with the outer frame and can lift along with the sling 9; the device body comprises a filter box 12, and the filter box 12 is communicated with a seawater inlet main pipeline 24; the filter box 12, the water inlet pump 18, the heating device 28 and the reverse osmosis membrane element 14 are connected in sequence; the reverse osmosis membrane element 14 is divided into three branches, wherein the first branch is communicated with a fresh water tank 15, the second branch is communicated with a concentrated seawater discharge pipeline 10, and the third branch is communicated with a back suction water tank 13; the fresh water tank 15 is connected with an air pipe 21, and the air pipe 21 is communicated with the atmosphere; the fresh water tank 15 is also connected to the fresh water storage tank 8 via a high pressure pump 22 and a fresh water transfer line.
Furthermore, a desalination membrane cleaning medicine is added into the back suction water tank 13, when the water inlet pump 18 is stopped, a valve on a branch of the back suction water tank 13 is opened, a valve 41 on a fresh water pipeline 40 leading from the reverse osmosis membrane 14 to the fresh water tank 15 is closed, fresh water in the back suction water tank 13 flows back to the reverse osmosis membrane element 14 to clean the membrane element due to natural osmosis, and the problems that the membrane element is damaged due to air brought by produced water flowing back in the membrane element and the like are solved.
further, a heating device 28 is arranged on the seawater inlet pipeline, and a temperature sensor 29 is arranged at the heating device 28.
Further, the concentrated seawater discharge pipeline 10 is inclined downward, the direction is away from the seawater inlet of the seawater inlet main pipeline 24 in the horizontal and vertical directions, the water outlet of the concentrated seawater discharge pipeline 10 is away from the water inlet by more than 10 m in the vertical direction, and the concentrated seawater discharge pipeline 10 is deep into the deep sea at an angle of 60 degrees with the vertical direction.
Furthermore, the device body is divided into seven parts, namely a seawater inlet pipeline module, a desalination membrane unit module, a fresh water production and conveying module, a fresh water resorption water tank module, a concentrated seawater discharging module, a control module and an outer frame module; the seawater inlet pipeline module comprises a seawater inlet main pipeline 24 and an inlet electronic flow valve 38 arranged on the seawater inlet main pipeline, a filter box 12, an inlet pump 18, a first electronic pressure gauge 25 arranged on a pipeline at the front part of the inlet pump, and a second electronic pressure gauge 26, a flow meter a27, a heating device 28 and a water temperature sensor 29 which are sequentially arranged on a pipeline at the rear part of the inlet pump; the desalination membrane module comprises a plurality of groups of reverse osmosis membrane units 14 which are arranged in parallel; the fresh water producing and outputting module comprises a flow meter b30 and a valve 41 which are arranged on the fresh water producing outlet pipeline of each reverse osmosis membrane unit 14, a fresh water pipeline 40, a fresh water tank 15 connected with the fresh water pipeline, an air pipe 21 on the fresh water tank 15, a pressure sensor 31 on the fresh water tank 15 and a fresh water delivery high-pressure pump module connected with the fresh water tank 15; the fresh water delivery high-pressure pump module comprises a high-pressure pump 22, a third electronic pressure gauge 33 at the front part of the high-pressure pump, a fourth electronic pressure gauge 34 and a check valve 35 which are sequentially arranged at the rear part of the high-pressure pump, and a fresh water delivery pipeline 20 which connects the high-pressure pump with the fresh water storage tank 8 on the upper semi-submersible platform; the fresh water suck-back tank module comprises a fresh water suck-back water tank 13, a valve 39 at the front end of the fresh water suck-back water tank 13 and a pressure sensor 32 at the rear end of the fresh water suck-back water tank 13; the concentrated seawater discharging module comprises a concentrated seawater pump 17, a concentrated seawater pipeline flowmeter 38, a concentrated seawater flow control valve 37, a concentrated seawater discharging pipeline 10 and a concentrated seawater pipeline check valve 36 at the tail end of the concentrated seawater discharging pipeline 10, wherein the concentrated seawater pump 17 is arranged at the front end of the concentrated seawater pump 17 in sequence; the control module comprises a control box 16 and a cable 19 connected to a power supply box on the upper platform; the outer frame module comprises an outer frame 11 and the sling 9.
Furthermore, a power supply box 7 is also arranged on the semi-submersible type ocean platform.
Furthermore, the three pipelines of the cable 19, the fresh water delivery pipe 20 and the air pipe 21 extend into the semi-submersible type ocean platform in the form of an umbilical cable.
Still further, the semi-submersible platform is composed of three parts: the upper deck 1, the upright post 2 and the buoyancy tank 3 are connected, the upper deck 1 and the buoyancy tank 3 are connected through the upright post 2, and the semi-submersible platform is fixed through a mooring system of an anchor chain 4 connected to the seabed.
furthermore, each module is subjected to high pressure resistant treatment, an underwater robot is adopted to repair and replace each module or components in the modules during minor repair of the device, and the device body is lifted to the platform through lifting equipment during major repair.
The beneficial effects of the utility model reside in that:
1) In consideration of the problem that the deep sea reverse osmosis seawater desalination device is difficult to clean and maintain, the desalination device and an ocean platform are combined through a lifting device and a sling, so that the desalination device can be lifted, and the problem that the desalination device is difficult to clean and maintain is solved through lifting.
2) The semi-submersible type ocean platform is combined with the deep sea reverse osmosis seawater desalination device, so that the development of offshore oil in south sea can be realized, the seawater desalination can be realized by utilizing the advantages of water depth and water temperature in south sea, and the seawater desalination device becomes a tool beneficial to the development and utilization of south sea resources in China.
3) The influence of deep sea low water temperature on the reverse osmosis desalination device is considered, a specific reverse osmosis membrane is selected for research and calculation, the influence of inlet water temperature on required inlet water pressure, namely the influence of a water layer to be placed is researched by combining with measured data of south sea water temperature and water pressure, a heating device and a water temperature sensor are arranged at the water inlet of the device, the inlet water temperature is reasonably increased, the requirement on the inlet water pressure can be reduced, the water yield can be increased, meanwhile, the device can run on a shallower water layer, the high pressure resistance requirement on the device material is reduced, and the cost is reduced.
4) the branch is arranged on the fresh water production pipeline and connected with the fresh water suck-back water tank, so that a series of problems that the membrane element is damaged due to the fact that produced water flows back to the membrane element under the action of natural osmosis when the machine is shut down and the membrane element is possibly brought with air are solved.
5) The cleaning medicine is added in the fresh water suck-back water tank, so that the cleaning medicine in the water tank flows to the membrane element under the natural osmosis effect to realize cleaning when the system is shut down, and the energy consumption is reduced, and the cleaning frequency through the lifting device is reduced.
6) The concentrated water discharge pipeline is designed to be inclined, the concentrated water discharge port is far away from the seawater inlet in the vertical and horizontal directions, the inclined discharge pipeline can also reduce the vertical distance between the water discharge port and the water inlet, which is required to be met by water inflow, and prevent the concentrated water from interfering, so that the pressurization requirement of the concentrated water discharge pump is reduced, the concentrated water can be discharged with lower energy consumption, and the influence of water discharge on the water inflow flow field and the water quality is prevented.
7) The modular design of the desalination device is divided into a seawater inlet pipeline module, a desalination membrane unit module, a fresh water produced water and conveying module, a fresh water suck-back water tank module, a concentrated seawater discharging module, a control module and an outer frame, and high pressure resistant treatment is respectively carried out on each part, so that the construction requirement of a large-volume pressure-resistant container is avoided, and the construction cost is reduced.
8) The modularized design is favorable for maintaining the device, the underwater robot can be used for repairing and replacing components during small maintenance of the device, the device does not need to be lifted to an upper platform, and the device can be lifted to the platform through the lifting device during large maintenance.
Drawings
FIG. 1 is a schematic diagram of the required water inlet pressure and the actual pressure of the water layer under the warm salt conditions at water layers of different depths of 18.006 ° N and 115.999 ° E in the south China sea.
FIG. 2 is a schematic diagram illustrating the effect of increasing the temperature of the feed water on the required pressure of the feed water under the deep salinity conditions of 18.006 ° N, 115.999 ° E510 m water in the south China sea.
FIG. 3 is an axonometric view of the deep sea reverse osmosis seawater desalination device of the utility model.
FIG. 4 is a front view of the deep sea reverse osmosis seawater desalination device of the present invention.
fig. 5 is a schematic view of the device body.
Fig. 6 is a schematic view of the device body from another perspective.
Fig. 7 is a front view of the apparatus body.
Fig. 8 is a structural diagram of a part of the components of the apparatus main body provided in the outer frame.
Fig. 9 is a schematic view of the structure of a part of the apparatus body.
Fig. 10 is a schematic view of the structure of a part of the apparatus body.
FIG. 11 is a schematic diagram of the deep sea reverse osmosis seawater desalination device of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1-11, the device is suspended in the deep sea of south sea by a lifting device 6 on a semi-submersible platform through a sling 9, wherein the pressure of the deep sea meets the reverse osmosis pressure required by a reverse osmosis membrane unit 18 for seawater desalination.
When the electromagnetic flow valve 38 and the intake pump 18 on the intake line 24 are opened, the high pressure seawater enters the filter box 12 from the seawater intake main line and is simply pre-treated to filter out possible impurities, and then the seawater is delivered to the reverse osmosis membrane unit 14 by the intake pump 18 and the line. Two electronic pressure gauges 25, 26 monitor the water pressure of the seawater when entering and leaving the water inlet pump respectively, and cooperate with the electronic pressure gauge on the water production pipeline to measure the pressure difference between the water inlet and the water production of the water production pressure monitoring device. The on/off of the water inlet and the flow rate are controlled by the electronic water inlet flow valve 38. In addition, the heating equipment 28 on the seawater inlet pipeline is matched with the water temperature sensor 29, so that the temperature of the inlet seawater is increased within a certain range, and the working efficiency of the desalination membrane is ensured.
The high-pressure seawater delivered to the reverse osmosis desalination membrane unit 14 is desalinated by the desalination membrane to produce fresh water and discharge concentrated seawater. Wherein the transport of fresh water is subjected to a process: the flow rate of the fresh water produced by each reverse osmosis membrane element can be measured by a flow meter 30 arranged on the pipeline, and the fresh water produced by each membrane element is gathered into a total water producing pipe 40 and is conveyed into the fresh water tank 15. The fresh water tank 15 is connected with a high-pressure pump 22, an electronic pressure gauge 33 is also arranged on the connecting pipeline, and the fresh water is conveyed to the fresh water storage tank 8 on the semi-submersible platform by the high-pressure pump along a fresh water conveying pipeline 20. The fresh water supply line 20 is provided with a check valve 35 to prevent the backflow of fresh water in an accident. An air pipe 21 is connected to the fresh water tank 15 and is connected to the upper part of the platform, and the pressure in the fresh water tank 15 in the system water production keeps an atmospheric pressure. The pressure in the fresh water tank is monitored 31 by means of a pressure sensor mounted in the upper part of the tank.
when the device is stopped, the valve 39 on the pipeline in the fresh water suck-back water tank module is opened, the valve 41 on the fresh water pipeline is closed, the fresh water in the suck-back water tank 13 flows into the reverse osmosis membrane element due to natural osmosis, and the fresh water added in the suck-back water tank can clean the pipeline. The pressure sensor 32 is used to monitor and ensure that the return suction tank is in a full state before the apparatus is about to stop, and if the return suction tank is not in a full state, the valve 41 on the fresh water pipeline is closed and the valve 39 on the branch of the fresh water return suction tank is opened, so that the fresh water produced is introduced into the return suction tank to replenish the fresh water, and the return suction tank is stopped after the return suction tank is full. This operation is also required to fill the fresh water return tank with fresh water before the next start-up.
The concentrated seawater which does not permeate through the reverse osmosis membrane is discharged through a concentrated seawater pipeline, a flowmeter 38 and an electromagnetic flow control valve 37 are arranged on the concentrated seawater pipeline, the flowmeter 38 measures the total flow of the concentrated seawater and needs to meet the minimum concentrated water flow limitation of the membrane element in normal and lasting operation, and the electromagnetic flow control valve 37 adjusts the flow and controls the overall recovery rate of the desalination system not to exceed the maximum recovery rate of the desalination system in normal operation. The concentrated seawater is pressurized and discharged to the external marine environment through a concentrated seawater pump 17 arranged on a concentrated seawater pipeline 10, and a check valve 36 is arranged on a concentrated seawater pump outlet pipeline 17 to prevent the seawater from flowing backwards. In addition, the discharge outlet of the concentrated seawater pipeline extends into the position which is 10 meters away from the bottom of the device in the vertical direction, the inclination angle of the concentrated seawater pipeline 10 is approximately 60 degrees from the vertical direction, and the water discharge outlet of the concentrated seawater pipeline is far away from the seawater inlet pipeline 24 in the horizontal and vertical directions, so that the discharged concentrated seawater is prevented from influencing the water quality of the inlet water of the device.
The control of the electronic components is controlled by the control box 12, the power supply required by the whole set of the device and the transmission of data are transmitted by the cable 19, and the cable 19 is connected with the electronic box 7 on the platform.
the utility model discloses pass through elevating gear and hoist cable with reverse osmosis sea water desalination device and semi-submerged formula platform and combine together, realize the liftable of device, solved the maintenance washing difficulty problem of device. Meanwhile, the water temperature is high and the temperature change is small in the south China sea all the year round, the water depth is large, the water temperature and the water depth conditions are very suitable for arrangement of a deep sea reverse osmosis seawater desalination device, the seawater desalination device is combined with a semi-submersible type ocean platform, the seawater desalination is realized while the development of the offshore oil is realized, and the method has practical significance for assisting the development of south China sea resources.
The fresh water return suction water tank is arranged on the fresh water production pipeline, so that air can not enter the desalination membrane system when the system is shut down, and the problems that membrane pollution, membrane drying, instrument damage and the like are caused when the system is restarted are avoided. Meanwhile, the membrane element can be cleaned under the action of natural osmotic pressure by adding the medicine into the back suction water tank, the natural osmotic pressure is utilized, the energy consumption is further reduced, and the frequency of maintaining and cleaning the device is favorably reduced.
The concentrated seawater drainage pipeline is arranged in an inclined mode, and the water outlet can be simultaneously away from the seawater inlet for a certain distance in the horizontal and vertical directions, so that the influence of concentrated water drainage on the flow field at the seawater inlet is avoided. Compared with the drainage pipeline which extends into the deep sea in a vertical mode, the inclined pipeline enables the influence of drainage on water inlet to be eliminated by a smaller vertical distance between the drainage port and the water inlet, which means that the drainage port faces smaller external seawater pressure, and the energy consumption requirement of the concentrated seawater drainage pump for discharging the concentrated seawater can be reduced.
Considering the influence of the low water temperature of deep sea water on the water yield of the device, the water temperature sensor and the heating device are arranged on the sea water inlet pipeline of the device to raise the water inlet temperature, so that the problems of low water yield, high water inlet pressure requirement and increased membrane element count requirement caused by low water temperature are solved, meanwhile, the device can be placed on a relatively shallower water layer due to the reduction of the required water inlet pressure, the requirement on the pressure resistance of the device material can be reduced, and the cost is reduced.
Regarding the influence of the inlet water temperature on the water yield of the device, for example, the type SW30HRLE-400i of the Dow seawater desalination membrane is selected, the influence of the water temperature change on the inlet water pressure required by the device and the depth of a water layer required to be placed is given by the Dow membrane design software WAVE, and the result is given by the graph 1 and the graph 2. The water temperature and water pressure data come from CTD thermohaline observation data set of Nanhai ocean section scientific investigation in 2012 of Chinese academy of sciences. Can verify that this device is through setting up heating device at the sea water intake, promotes the temperature of intaking, can be so that the operation of integral membrane system is more high-efficient, simultaneously under the fixed rate of recovery condition of fixed water yield, the promotion of the temperature of intaking makes the pressure demand of intaking of device reduce, and the device is placed at the water layer of relative more shallow a bit and can be reached the pressure requirement of intaking.
The foregoing is a preferred embodiment of the present invention, and those skilled in the art can make various changes or modifications without departing from the general concept of the present invention, and such changes or modifications should fall within the scope of the present invention as claimed.
Claims (9)
1. A deep sea reverse osmosis seawater desalination device is characterized in that:
the lifting device (6) and the fresh water storage tank (8) are arranged on the semi-submersible type ocean platform;
The device body is arranged in an outer frame (11), and the outer frame (11) is connected with a lifting device (6) through a sling (9); the device body is immersed in seawater along with the outer frame and can lift along with the sling (9);
The device body comprises a filter box (12), and the filter box (12) is communicated with a seawater inlet main pipeline (24); the filter box (12), the water inlet pump (18), the heating device (28) and the reverse osmosis membrane element (14) are connected in sequence;
The reverse osmosis membrane element (14) is divided into three branches, wherein the first branch is communicated with a fresh water tank (15), the second branch is communicated with a concentrated seawater discharge pipeline (10), and the third branch is communicated with a back suction water tank (13);
the fresh water tank (15) is connected with an air pipe (21), and the air pipe (21) is communicated with the atmosphere; the fresh water tank (15) is also connected with the fresh water storage tank (8) through a high-pressure pump (22) and a fresh water conveying pipeline.
2. The deep sea reverse osmosis seawater desalination plant of claim 1, wherein the back suction water tank (13) is filled with desalination membrane cleaning chemicals, when the water inlet pump (18) is stopped, a valve on a branch of the back suction water tank (13) is opened, a valve (41) on a fresh water pipeline (40) leading from the reverse osmosis membrane element (14) to the fresh water tank (15) is closed, fresh water in the back suction water tank (13) flows back to the reverse osmosis membrane element (14) due to natural osmosis to clean the membrane element, and produced water is prevented from flowing back to bring air in the membrane element to damage the membrane element.
3. The deep sea reverse osmosis seawater desalination plant of claim 1 wherein the seawater inlet line is provided with a heating device (28) and the heating device (28) is provided with a water temperature sensor (29).
4. The deep sea reverse osmosis seawater desalination plant of claim 1, characterized in that the concentrated seawater discharge pipeline (10) is inclined downward and directed horizontally and vertically away from the seawater inlet of the seawater inlet main pipeline (24), the water outlet of the concentrated seawater discharge pipeline (10) is vertically away from the seawater inlet by more than 10 m, and the concentrated seawater discharge pipeline (10) extends deep into the sea at an angle of 60 ° to the vertical.
5. The deep sea reverse osmosis seawater desalination plant of claim 1 wherein:
The device body is divided into a seawater inlet pipeline module, a desalination membrane unit module, a fresh water producing and conveying module, a fresh water suck-back water tank module, a concentrated seawater discharging module, a control module and an outer frame module;
The seawater inlet pipeline module comprises a seawater inlet main pipeline (24) and an inlet electronic flow valve (38) arranged on the seawater inlet main pipeline, a filter box (12), an inlet pump (18), a first electronic pressure gauge (25) arranged on a pipeline at the front part of the inlet pump, a second electronic pressure gauge (26), a flow meter a (27), a heating device (28) and a water temperature sensor (29) which are sequentially arranged on a pipeline at the rear part of the inlet pump;
The desalination membrane module comprises a plurality of groups of reverse osmosis membrane elements (14) which are arranged in parallel;
the fresh water producing and outputting module comprises a flow meter b (30) and a valve (41) which are arranged on a fresh water producing outlet pipeline of each reverse osmosis membrane element (14), a fresh water pipeline (40), a fresh water tank (15) connected with the fresh water pipeline, an air pipe (21) on the fresh water tank (15), a pressure sensor (31) on the fresh water tank (15) and a fresh water conveying high-pressure pump module connected with the fresh water tank (15); the fresh water delivery high-pressure pump module comprises a high-pressure pump (22), a third electronic pressure gauge (33) at the front part of the high-pressure pump, a fourth electronic pressure gauge (34) and a check valve (35) which are sequentially arranged at the rear part of the high-pressure pump, and a fresh water delivery pipe (20) which connects the high-pressure pump with a fresh water storage water tank (8) on the upper semi-submersible platform;
The fresh water suck-back tank module comprises a fresh water suck-back water tank (13), a valve (39) at the front end of the fresh water suck-back water tank (13) and a pressure sensor (32) at the rear end of the fresh water suck-back water tank (13);
the concentrated seawater discharging module comprises a concentrated seawater pump (17), a water inlet electronic flow valve (38), a concentrated seawater flow control valve (37), a concentrated seawater discharging pipeline (10) and a concentrated seawater pipeline check valve (36) at the tail end of the concentrated seawater discharging pipeline (10), wherein the front end of the concentrated seawater pump (17) is sequentially provided with the water inlet electronic flow valve (38), the concentrated seawater flow control valve (37);
The control module comprises a control box (16) and a cable (19) connected with a power supply box on the upper platform;
The outer frame module comprises an outer frame (11) and the sling (9).
6. The deep sea reverse osmosis seawater desalination plant of claim 1 wherein the semi-submersible platform is further provided with a power supply box (7).
7. The deep sea reverse osmosis seawater desalination plant of claim 6 wherein the three pipelines of the cable (19), the fresh water delivery pipe (20) and the air pipe (21) are extended into the semi-submersible platform in the form of an umbilical cable.
8. The deep sea reverse osmosis seawater desalination plant of claim 7 wherein the semi-submersible platform is comprised of three parts: the upper deck (1), the upright column (2) and the buoyancy tank (3), the upper deck (1) and the buoyancy tank (3) are connected through the upright column (2), and the semi-submersible platform is fixed through a mooring system of an anchor chain (4) connected to the seabed.
9. The deep sea reverse osmosis seawater desalination device of claim 5 wherein each module is subjected to high pressure resistant treatment, and during minor repair of the device, an underwater robot is used to repair and replace each module or components in the module, and during major repair, the device body is lifted to the platform by a lifting device.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109647206A (en) * | 2019-01-31 | 2019-04-19 | 上海交通大学 | Deep-sea reverse osmosis desalination device and its method |
| CN111626007A (en) * | 2020-06-11 | 2020-09-04 | 中国科学院沈阳自动化研究所 | Umbilical cable dynamics model verification system |
| CN112985860A (en) * | 2021-02-02 | 2021-06-18 | 自然资源部天津海水淡化与综合利用研究所 | Test platform and test method for handheld seawater desalination machine |
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2019
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109647206A (en) * | 2019-01-31 | 2019-04-19 | 上海交通大学 | Deep-sea reverse osmosis desalination device and its method |
| CN111626007A (en) * | 2020-06-11 | 2020-09-04 | 中国科学院沈阳自动化研究所 | Umbilical cable dynamics model verification system |
| CN111626007B (en) * | 2020-06-11 | 2024-02-06 | 中国科学院沈阳自动化研究所 | Umbilical cable dynamics model verification system |
| CN112985860A (en) * | 2021-02-02 | 2021-06-18 | 自然资源部天津海水淡化与综合利用研究所 | Test platform and test method for handheld seawater desalination machine |
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