CN210764673U - Modular-design combined two-stage reverse osmosis seawater desalination device - Google Patents
Modular-design combined two-stage reverse osmosis seawater desalination device Download PDFInfo
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- CN210764673U CN210764673U CN201921657693.6U CN201921657693U CN210764673U CN 210764673 U CN210764673 U CN 210764673U CN 201921657693 U CN201921657693 U CN 201921657693U CN 210764673 U CN210764673 U CN 210764673U
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- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 149
- 239000013535 sea water Substances 0.000 title claims abstract description 52
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 37
- 238000013461 design Methods 0.000 title claims abstract description 15
- 239000012528 membrane Substances 0.000 claims abstract description 99
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 230000001105 regulatory effect Effects 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 239000011152 fibreglass Substances 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims 3
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 6
- 239000013505 freshwater Substances 0.000 description 20
- 150000003839 salts Chemical class 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses a modular design's combination formula second grade reverse osmosis sea water desalination device. The utility model discloses be applied to the sea water desalination field. The utility model comprises a primary reverse osmosis membrane cylinder, a secondary concentrated water regulating valve, a common base, a booster pump, a multi-medium filter, a precision filter, a security filter, a primary high-pressure pump, a secondary high-pressure pump, a cleaning water tank, an electric cabinet, an electric instrument and a valve control unit; wherein, the first-stage reverse osmosis membrane cylinder comprises a first-stage reverse osmosis membrane shell and a first-stage reverse osmosis membrane core; the secondary reverse osmosis membrane cylinder comprises a secondary reverse osmosis membrane shell and a secondary reverse osmosis membrane core; the first-stage and second-stage reverse osmosis membrane cylinder, the second-stage concentrated water regulating valve, the booster pump, the multi-medium filter, the precision filter, the security filter, the first-stage and second-stage high-pressure pump, the cleaning water tank, the electric cabinet, the electric instrument and the valve control unit are all arranged on the common base. The device has the advantages of small occupied space, low energy consumption and convenient installation and maintenance.
Description
Technical Field
The invention relates to the field of seawater desalination devices, in particular to a modular combined two-stage reverse osmosis seawater desalination device.
Background
The modern naval vessels execute the ocean combat task, a large amount of fresh water is consumed by equipment and personnel, and the fresh water supplement amount for the naval vessels is related to factors such as tonnage, power plant types and personnel establishment of the naval vessels. The fresh water carried by ships can not meet the demand, and therefore, large and medium ships are equipped with seawater desalination devices, and the seawater desalination technologies mastered by various manufacturers at present comprise a reverse osmosis method, a multi-stage flash evaporation method, a pneumatic distillation method, an electrodialysis method and a freezing method. In actual operation tests, the reverse osmosis method becomes the first choice technology of seawater desalination engineering, and the reverse osmosis device is superior to other devices in the aspects of indexes such as actual water production capacity, operation efficiency, maintainability and starting time performance. With the development of reverse osmosis technology, reverse osmosis seawater desalination has become more and more widely applied to ships.
A single-stage reverse osmosis seawater desalination device or a split type two-stage reverse osmosis seawater desalination device is generally arranged on a traditional ship, the electric conductivity of produced water of the single-stage reverse osmosis seawater desalination device is generally less than 700mg/L, the water quality of the produced water of the current first stage is less than 500mg/L according to the requirements of a novel spectrum, so the originally used single-stage reverse osmosis can not meet the technical requirements of the novel spectrum, and the split type two-stage reverse osmosis seawater desalination device separates the first stage from the second stage reverse osmosis and respectively needs different installation bases and inlet and outlet pipelines. The multistage reverse osmosis is not directly connected, so that the consumption is large; the use process needs manual adjustment and is complex to operate.
Therefore, those skilled in the art are dedicated to develop a new combined two-stage reverse osmosis seawater desalination device, which can improve the quality of fresh water, reduce the space occupied by the equipment and reduce the energy consumption.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defects of the prior art, the technical problem to be solved in the utility model is to design the combined type two-stage reverse osmosis seawater desalination device to reduce the equipment space occupation and the energy consumption.
In order to realize the aim, the utility model provides a modular combined two-stage reverse osmosis seawater desalination device, which comprises a first-stage reverse osmosis membrane cylinder, a second-stage concentrated water regulating valve, a common base, a booster pump, a multi-medium filter, a precision filter, a security filter, a first-stage high-pressure pump, a second-stage high-pressure pump, a cleaning water tank, an electric cabinet, an electric instrument and a valve control unit; the first-stage reverse osmosis membrane cylinder comprises a first-stage reverse osmosis membrane shell and a first-stage reverse osmosis membrane core; the secondary reverse osmosis membrane cylinder comprises a secondary reverse osmosis membrane shell and a secondary reverse osmosis membrane core; the first-stage reverse osmosis membrane cylinder, the second-stage concentrated water regulating valve, the booster pump, the multi-media filter, the precision filter, the cartridge filter, the first-stage high-pressure pump, the second-stage high-pressure pump, the cleaning water tank, the electric instrument and the valve control unit are all installed on the public base.
Further, the first-stage reverse osmosis membrane cylinder and the second-stage reverse osmosis membrane cylinder are both designed into a shell and a core.
Further, the primary reverse osmosis membrane shell and the secondary reverse osmosis membrane shell are glass fiber reinforced plastic pressure vessels.
Furthermore, the salt rejection rate of a single first-stage reverse osmosis membrane core is more than 99%.
Furthermore, the secondary reverse osmosis membrane core adopts a brackish water membrane LLE-4040 membrane.
Furthermore, 7 primary reverse osmosis membrane cylinders are arranged in parallel; the secondary reverse osmosis membrane cylinder has 2, and the parallel installation.
Further, the booster pump is arranged at a high-pressure seawater outlet of the energy recovery device; and the seawater at the outlet of the booster pump is mixed with the seawater of the primary high-pressure pump and then enters the primary reverse osmosis membrane cylinder.
Furthermore, the booster pump is controlled by a frequency converter.
Furthermore, the second-stage concentrated water regulating valve is arranged at a second-stage concentrated water outlet, and part of second-stage concentrated water is delivered to the front end of the first-stage reverse osmosis membrane cylinder after the opening degree is regulated.
Further, the cartridge filter filters out particles larger than 3 μm in water.
The utility model discloses an among the preferred embodiment, compare with prior art, the utility model discloses modular design is adopted to combination formula reverse osmosis sea water desalination device, is convenient for install and maintain, simultaneously, has dwindled the maintenance space greatly. The combined reverse osmosis seawater desalination device integrates the first-stage reverse osmosis and the second-stage reverse osmosis on 1 public base, does not have a transition water tank in the middle, adopts a first-stage direct connection mode and a second-stage direct connection mode, and has obvious advantages:
(1) the occupied space is small, the water inlet and outlet pipelines are simple, and the combined reverse osmosis with the same yield and water quality occupies much less space than the split two-stage reverse osmosis;
(2) energy consumption is saved, and reverse osmosis needs lower energy consumption than split type two-stage reverse osmosis when one set of water with the same yield and water quality is combined;
(3) the area occupied by maintenance is economic and reasonable, each component is easy to disassemble and assemble, and the maintenance time is shortened.
The first stage reverse osmosis and the second stage reverse osmosis are directly connected, the transition water tank is not arranged in the middle, the regulating valve is arranged at the second stage concentrated water outlet, after the regulation is finished, the manual regulation is not needed in the use process, and the operation flow of the device is simplified.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic front perspective view of a modular combined two-stage reverse osmosis desalination plant according to a preferred embodiment of the present invention;
FIG. 2 is a schematic left side perspective view of a modular combined two-stage reverse osmosis desalination plant according to a preferred embodiment of the present invention;
FIG. 3 is a flow chart of a preferred embodiment of the present invention;
the system comprises a first-stage reverse osmosis membrane cylinder, a second-stage reverse osmosis membrane cylinder, a 3-electrical instrument and valve control unit, a 4-electric cabinet, a 5-multi-medium filter, a 6-first-stage high-pressure pump, a 7-security filter, an 8-common base, a 9-precision filter, a 10-second-stage high-pressure pump, an 11-pipeline and a 12-booster pump.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
As shown in fig. 1, fig. 2 and fig. 3, the utility model provides a modular design combined two-stage reverse osmosis seawater desalination device, which comprises a primary reverse osmosis membrane cylinder 1, a secondary reverse osmosis membrane cylinder 2, a secondary concentrated water regulating valve, a public base 8, a booster pump 12, a multi-medium filter 5, a precision filter 9, a security filter 7, a primary high-pressure pump 6, a secondary high-pressure pump 10, a cleaning water tank, an electric cabinet 4 and an electric instrument and valve control unit 3; wherein, the first-stage reverse osmosis membrane cylinder 1 comprises a first-stage reverse osmosis membrane shell and a first-stage reverse osmosis membrane core; the secondary reverse osmosis membrane cylinder 2 comprises a secondary reverse osmosis membrane shell and a secondary reverse osmosis membrane core; the first-stage reverse osmosis membrane cylinder 1, the second-stage reverse osmosis membrane cylinder 2, the second-stage concentrated water regulating valve, the booster pump 12, the multi-medium filter 5, the ultrafilter 9, the security filter 7, the first-stage high-pressure pump 6, the second-stage high-pressure pump 10, the cleaning water tank, the electric instrument and the valve control unit 3 are all arranged on a common base 8 and are connected through a pipeline 11. The combined type ship base is particularly suitable for being applied to ships, only 1 common base 8 is needed, and the whole device is combined, compact in structure and small in occupied space.
Reverse osmosis seawater desalination utilizes the reverse osmosis principle to separate fresh water from seawater, because reverse osmosis membrane is a semipermeable membrane, can make the hydrone smoothly pass through and prevent the salt molecule from passing through the film, if there is sufficient pressure to act on the seawater on one side of the osmosis membrane, when pressure exceeds the osmotic pressure of seawater, the hydrone passes through the membrane from the seawater side in the reverse direction and gets into the fresh water side, and the salt molecule is obstructed, just so can produce fresh water.
The function of several components of the device:
the second-stage concentrated water regulating valve is arranged at a second-stage concentrated water outlet, and part of the second-stage concentrated water is delivered to the front end of the first-stage reverse osmosis membrane cylinder 1 after the opening degree is regulated.
A first-stage reverse osmosis membrane shell: and loading the RO membrane, wherein a glass fiber reinforced plastic pressure container and a shell core are adopted to provide a container for the first-stage reverse osmosis membrane.
Primary reverse osmosis membrane core (inside primary reverse osmosis membrane shell): the raw water treated by the pretreatment unit is further filtered by a cartridge filter 7 to remove particles larger than 3 mu m in the water, then the water enters a first-stage high-pressure pump 6, and enters a reverse osmosis membrane core after being pressurized, the water can enter a fresh water side through the RO membrane under high pressure due to the selective permeability of the RO membrane, and various salt is flushed out along with high-pressure water flow to divide the water into two parts, so that the aim of separating salt from water is fulfilled. The salt rejection rate of a single membrane of the first-stage reverse osmosis membrane is more than 99 percent.
First-stage high-pressure pump 6: and sufficient water inlet pressure is provided for the first-stage reverse osmosis membrane cylinder 1, and the normal operation of the reverse osmosis membrane is maintained.
12, a booster pump: the seawater pressure from the energy recovery device cannot completely meet the designed working pressure of the first-stage reverse osmosis membrane cylinder 1, so that a booster pump 12 is required to be arranged at the high-pressure seawater outlet of the energy recovery device to improve the seawater pressure entering the first-stage reverse osmosis membrane cylinder 1, and the booster pump 12 is required to be controlled by a frequency converter to meet the designed flow and pressure. The seawater at the outlet of the booster pump 12 is mixed with the water at the outlet of the first-stage high-pressure pump 6 and then enters the first-stage reverse osmosis membrane cylinder 1.
Second-stage high-pressure pump 10: the salt content of the first-stage reverse osmosis effluent is less than 500mg/L, and the salt content of the fresh water is required to be less than 150mg/L, so that the first-stage reverse osmosis effluent needs to be subjected to reverse osmosis once again, namely, the second-stage reverse osmosis. However, the water quality of the first-stage reverse osmosis produced water is good, so that the second-stage reverse osmosis can meet the requirement only by lower pressure, the working pressure of the second-stage reverse osmosis is generally less than 1.6MPa, and the second-stage high-pressure pump 10 provides working pressure for the second-stage reverse osmosis.
A second-stage reverse osmosis membrane shell: the pressure vessel is 300psi standard, because the working pressure of the second reverse osmosis is not high, two reverse osmosis membranes are arranged in each membrane shell. And a container is provided for the secondary reverse osmosis membrane core.
A second-stage reverse osmosis membrane core: the secondary reverse osmosis membrane adopts a brackish water membrane LcLE-4040 with high water yield and low energy consumption, and compared with other brackish water membranes, the membrane has lower working pressure and higher water yield.
In the seawater desalination process, seawater enters a multi-media filter 5 after being pressurized by a seawater booster pump, the seawater is filtered in the multi-media filter 5 to remove microorganisms, colloidal bodies and large granular impurities in the seawater, and then enters a precision filter 9, the precision filter 9 is a 5-micron folding filter element and is used for filtering particles larger than 5 microns, the seawater also comprises gravel carried by the multi-media filter 5, the seawater enters a security filter 7 after being filtered by the precision filter 9, the security filter 7 is composed of a 3-micron folding filter element and is used for further filtering the granules and the impurities carried in the seawater. The water from the security filter 7 enters the first-stage reverse osmosis membrane cylinder 1 through the pressure boosting of the first-stage high-pressure pump 6, a pressure regulating electric valve is arranged at a concentrated water outlet of the first-stage reverse osmosis membrane cylinder 1 and used for slowly increasing the working pressure of the reverse osmosis membrane and preventing water hammer impact brought to the first-stage reverse osmosis membrane core from puncturing the reverse osmosis membrane when the first-stage high-pressure pump 6 is started, a pressure sensor is arranged at an outlet of the first-stage high-pressure pump 6 and used for monitoring the working pressure of the first-stage reverse osmosis, and a pressure alarm of. The water is divided into two paths after passing through the first-stage reverse osmosis membrane cylinder 1, one path is low-pressure fresh water, the other path is high-pressure concentrated water, the high-pressure concentrated water is directly discharged through a concentrated water pipeline, the other path is low-pressure fresh water, an electric three-way ball valve is arranged on the pipeline and used for switching between qualified fresh water and unqualified fresh water, and the qualified fresh water is boosted by the second-stage high-pressure pump 10 and enters the second-stage reverse osmosis. The unqualified fresh water is sent back to the front end of the first-stage high-pressure pump 6, is converged with the water from the cartridge filter 7, and is sent into the first-stage reverse osmosis membrane cylinder 1 through the first-stage high-pressure pump 6. The salinity of the produced water filtered by the primary reverse osmosis membrane core is less than 500mg/L, the produced water enters the secondary reverse osmosis membrane cylinder 2 after passing through the secondary high-pressure pump 10, the working pressure of the secondary reverse osmosis membrane cylinder 2 is lower and generally less than 1.6MPa, the produced water is divided into secondary produced water and secondary concentrated water at the rear end of the secondary reverse osmosis membrane cylinder 2 after passing through the permeation of the secondary reverse osmosis membrane core, the secondary produced water is divided into qualified fresh water and unqualified fresh water (the salinity is more than or equal to 150mg/L) after being detected by a conductivity meter, an electric three-way ball valve is arranged on a pipeline and used for switching the qualified fresh water and the unqualified fresh water, the qualified water enters a fresh water cabin after. And before the second-stage concentrated water flows back to the second-stage high-pressure pump 10, the second-stage concentrated water respectively flows back to the inlet of the first-stage high-pressure pump 6 and the inlet of the second-stage high-pressure pump 10, and the second-stage concentrated water is not discharged outside and is completely recycled.
The combined reverse osmosis seawater desalination device integrates the first-stage reverse osmosis and the second-stage reverse osmosis on a common base 8, a transition water tank is not arranged in the middle, and the first-stage direct connection mode and the second-stage direct connection mode are adopted, so that the combined reverse osmosis seawater desalination device has obvious advantages:
(1) the occupied space is small, the water inlet and outlet pipelines are simple, and the combined reverse osmosis with the same yield and water quality occupies much less space than the split two-stage reverse osmosis;
(2) energy consumption is saved, and reverse osmosis needs lower energy consumption than split type two-stage reverse osmosis when one set of water with the same yield and water quality is combined;
(3) the area occupied by maintenance is economic and reasonable, each component is easy to disassemble and assemble, and the maintenance time is shortened. And is convenient to operate and use.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A modular design combined type two-stage reverse osmosis seawater desalination device is characterized by comprising a first-stage reverse osmosis membrane cylinder, a second-stage concentrated water regulating valve, a common base, a booster pump, a multi-medium filter, a precision filter, a security filter, a first-stage high-pressure pump, a second-stage high-pressure pump, a cleaning water tank, an electric cabinet, an electric instrument and a valve control unit; wherein,
the first-stage reverse osmosis membrane cylinder comprises a first-stage reverse osmosis membrane shell and a first-stage reverse osmosis membrane core;
the secondary reverse osmosis membrane cylinder comprises a secondary reverse osmosis membrane shell and a secondary reverse osmosis membrane core;
the first-stage reverse osmosis membrane cylinder, the second-stage concentrated water regulating valve, the booster pump, the multi-medium filter, the precision filter, the security filter, the first-stage high-pressure pump, the second-stage high-pressure pump, the cleaning water tank, the electric cabinet and the electric instrument and valve control unit are all installed on the public base.
2. The modular design combined two-stage reverse osmosis seawater desalination plant of claim 1 wherein the primary reverse osmosis membrane cartridge and the secondary reverse osmosis membrane cartridge are both designed as a shell and a core.
3. The modular design combined two-stage reverse osmosis desalination plant of claim 2 wherein the primary reverse osmosis membrane shell and the secondary reverse osmosis shell are glass reinforced plastic pressure vessels.
4. The modular design combined two-stage reverse osmosis seawater desalination plant of claim 3, wherein the single first stage reverse osmosis membrane core has a desalination rate of more than 99%.
5. The modular design combined two-stage reverse osmosis seawater desalination plant of claim 3, wherein the two-stage reverse osmosis membrane core is made of a brackish water membrane LcLE-4040.
6. The modular design combined two-stage reverse osmosis seawater desalination plant of claim 1, wherein 7 primary reverse osmosis membrane cartridges are installed in parallel; the secondary reverse osmosis membrane cylinder has 2, and the parallel installation.
7. The modular design combined two-stage reverse osmosis seawater desalination plant of claim 1, wherein the booster pump is disposed at the energy recovery plant high pressure seawater outlet; and the seawater at the outlet of the booster pump is mixed with the seawater of the primary high-pressure pump and then enters the primary reverse osmosis membrane cylinder.
8. The modular design combined two-stage reverse osmosis desalination plant of claim 7, wherein the booster pump is controlled by a frequency converter.
9. The modular combined two-stage reverse osmosis seawater desalination plant of claim 1, wherein the two-stage concentrate control valve is disposed at the two-stage concentrate outlet, and after adjusting the opening degree, part of the two-stage concentrate is delivered to the front end of the one-stage reverse osmosis membrane cartridge.
10. The modular design combined two-stage reverse osmosis desalination plant of claim 1, wherein the cartridge filter filters out particles larger than 3 μm in the water.
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| CN201921657693.6U CN210764673U (en) | 2019-09-30 | 2019-09-30 | Modular-design combined two-stage reverse osmosis seawater desalination device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283065A (en) * | 2020-11-13 | 2021-01-29 | 启迪集群创新研究院(青岛)有限公司 | Seawater desalination pump |
| CN113526698A (en) * | 2021-06-30 | 2021-10-22 | 中国船舶重工集团公司第七一九研究所 | Combined reverse osmosis seawater desalination device |
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2019
- 2019-09-30 CN CN201921657693.6U patent/CN210764673U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283065A (en) * | 2020-11-13 | 2021-01-29 | 启迪集群创新研究院(青岛)有限公司 | Seawater desalination pump |
| CN113526698A (en) * | 2021-06-30 | 2021-10-22 | 中国船舶重工集团公司第七一九研究所 | Combined reverse osmosis seawater desalination device |
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