CN216337073U - Sea water desalination equipment - Google Patents

Abstract

The utility model discloses seawater desalination equipment which comprises a multi-media filter, an activated carbon filter, a disc filter, an ultrafiltration system, an intermediate water tank and a reverse osmosis system, wherein the multi-media filter, the activated carbon filter, the disc filter, the ultrafiltration system, the intermediate water tank and the reverse osmosis system are sequentially arranged, and water produced by the ultrafiltration system enters the reverse osmosis system through the intermediate water tank or is stored in the intermediate water tank and used for back washing of the ultrafiltration system. The seawater desalination equipment can enhance the pretreatment effect through different filtering equipment, can reduce the cleaning frequency of the equipment by matching with the cleaning function of the filtering equipment, and is beneficial to prolonging the service life of the equipment.

Description

Sea water desalination equipment

Technical Field

The utility model relates to the field of seawater desalination equipment, in particular to seawater desalination equipment.

Background

With the increasing crisis of fresh water resources in the world, various countries gradually focus on the field of seawater desalination. As an open source incremental technology of water resources, seawater desalination has become an important approach to solve the global water resource crisis. At present, reverse osmosis seawater desalination (SWRO) is one of the mainstream technologies for seawater desalination. The large-scale seawater desalination plant needs to be built in civil engineering and other engineering modes, has long period and high cost, has high requirements on site construction and sites, and is not movable so that the water supply plant can only meet the peripheral water supply requirements of the water plant. For the water consumption of the urban level, building a seawater desalination plant is a reasonable solution; however, for the requirement of water with medium and small tonnage, building water plants inevitably appears as 'large and small materials', and skid-mounted or container-type seawater desalination devices with various structures appear for the purpose, and the form has the greatest characteristics of high integration level, integrated design and high flexibility (can be moved), and can be transferred to other places for use according to the requirements. The application scenes comprise water for islands, water for residents at seasides, water for offshore platforms, water for large ships and naval vessels, emergency water for the scenes and the like.

The core process of the integrated seawater desalination device is 'pretreatment + reverse osmosis', wherein the reverse osmosis part is a core part for completing seawater desalination, and the pretreatment part is mainly used for removing sediments, colloidal substances, oxides, suspended solids, microorganisms and the like in seawater, preventing the membrane surface of the reverse osmosis from scaling, blocking, oxidizing damage and the like, and directly influencing the operation stability of the device and the cleaning cycle and the service life of the reverse osmosis membrane due to the fact that whether the pretreatment process is complete and proper in design.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide seawater desalination equipment, which can enhance the pretreatment effect through different filtering equipment, thereby reducing the cleaning frequency of the equipment and being beneficial to prolonging the service life of the equipment.

The technical scheme of the utility model is as follows: a seawater desalination device comprises a multi-media filter, an activated carbon filter, a disc filter, an ultrafiltration system, an intermediate water tank and a reverse osmosis system which are sequentially arranged, wherein water produced by the ultrafiltration system enters the reverse osmosis system through the intermediate water tank or is stored in the intermediate water tank and used for back washing of the ultrafiltration system.

Optionally, the water inlet of multi-media filter is connected with first feed pipe, along the feedwater direction of first feed pipe, former water tank, first booster pump and pipeline mixer have set gradually on the first feed pipe, the pipeline mixer still is connected with germicide and puts in device and flocculating agent and puts in the device.

Optionally, a water outlet of the ultrafiltration system is connected with a reducing agent feeding device.

Optionally, the delivery port of middle water tank is connected with the second feed pipe, along the water supply direction of second feed pipe, set gradually second booster pump, antisludging agent input device, cartridge filter, high-pressure pump on the second feed pipe and reverse osmosis system.

Optionally, the ultrafiltration system is further connected to a first cleaning water tank, and a first chemical cleaning solution is stored in the first cleaning water tank and used for chemically cleaning the ultrafiltration system; the reverse osmosis system is also connected with a second cleaning water tank, and a second chemical cleaning solution is stored in the second cleaning water tank and is used for chemically cleaning the reverse osmosis system.

Optionally, a water production port of the reverse osmosis system is connected with a water production tank, and the water production tank is used for storing water produced by the reverse osmosis system; and a clear water cleaning pipeline is connected between the water production tank and the water inlet of the reverse osmosis system.

Optionally, the water production tank is further connected with a first water outlet pipe for conveying water in the water production tank; and the first water outlet pipe is provided with a first constant-pressure water supply system for stabilizing the water supply pressure of the first water outlet pipe.

Optionally, the product water tank still is connected with the second outlet pipe, along the play water direction of second outlet pipe, third booster pump, nanofiltration system and drinking water tank have set gradually on the second outlet pipe, the quoting water tank still is connected with the third outlet pipe, along the play water direction of third outlet pipe, second constant voltage water supply system, sterilizing equipment have set gradually on the third outlet pipe.

Optionally, the nanofiltration system is further connected to a third cleaning water tank, and a third chemical cleaning solution is stored in the third cleaning water tank and used for chemically cleaning the nanofiltration system.

Optionally, the water outlet of the cartridge filter and the water inlet of the reverse osmosis system are connected with a branch water pipeline, an energy recovery device and a fourth booster pump are sequentially arranged on the branch water pipeline along the water flow direction of the branch water pipeline, the concentrated water discharge port of the reverse osmosis system and the water inlet of the energy recovery device are connected with a first concentrated water discharge pipe, and the water outlet of the energy recovery device is further connected with a second concentrated water discharge pipe.

The utility model has the beneficial effects that:

1. the sea water desalination equipment of this application can strengthen the effect of preliminary treatment through the filtration equipment of difference, and the cleaning function of cooperation filtration equipment can reduce equipment cleaning frequency, is favorable to improve equipment life.

2. The seawater desalination equipment provided by the application is additionally provided with the chemical cleaning devices of the reverse osmosis system, the ultrafiltration system and the nanofiltration system, and is beneficial to removing accumulated pollutants on the membrane, so that the performance of the membrane is recovered.

3. The utility model provides a sea water desalination equipment sets up first outlet pipe and second outlet pipe on producing the water tank, and wherein, the water of carrying in the second outlet pipe is receiving the filtration of system of receiving filtration, can further filter the water of reverse osmosis system output to realize the water supply of dual.

4. The utility model provides a sea water desalination equipment has increased branch water pipeline and energy recuperation device, when will sending to reverse osmosis system's water and shunt, can follow the power and the energy consumption of recovered energy in order to reduce the high-pressure pump in the dense water.

5. The seawater desalination equipment is provided with the constant-pressure water supply system on the water outlet pipe, and can stabilize the water supply pressure of the water outlet pipe, so that the water supply quality is improved.

Drawings

Fig. 1 is a schematic structural diagram of a seawater desalination apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a first purge line according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a second cleaning pipeline according to an embodiment of the present invention;

in the figure, 1, a raw water tank; 2. a first booster pump; 3. a pipeline mixer; 4. a bactericide delivery device; 5. a flocculating agent feeding device; 6. A multi-media filter; 6-1, a first cleaning discharge port; 7. an activated carbon filter; 7-1, a second cleaning discharge port; 8. a disc filter; 8-1, a third cleaning discharge port; 9. an ultrafiltration system; 9-1, a fourth cleaning discharge port; 10. a gas source; 11. a reducing agent dosing device; 12. an intermediate water tank; 13. a second booster pump; 14. a scale inhibitor delivery device; 15. a cartridge filter; 16. a high pressure pump; 17. An energy recovery device; 18. a reverse osmosis system; 19. a water production tank; 20. a first constant pressure water supply system; 20-1, a water supply pump of a water production tank; 20-2, a pressure stabilizing tank of the production water tank; 21. a third booster pump; 22. a nanofiltration system; 23. a drinking water tank; 24. a drinking water tank water supply pump; 25. a pressure stabilizing tank of the drinking water tank; 26. a sterilizing device; 27. a liquid level sensor; 28. a fourth booster pump; 29. a second cleaning water tank; 30. a second cleaning pump; 31. a second cleaning filter; 32. a first cleaning water tank; 33. a first cleaning pump; 34. a first cleaning filter; 35. a fifth booster pump; 36. a first concentrated water discharge regulating valve; 37. a second concentrated water discharge regulating valve; 38. cleaning the valve; 39. a second constant pressure water supply system; 101. a first water supply pipe; 102. a second water supply pipe; 103. cleaning the pipeline with clean water; 104. a first cleaning pipeline; 105. a second cleaning pipeline; 106. a first water outlet pipe; 107. a second water outlet pipe; 108. a third water outlet pipe; 109. a branch water pipeline; 110. and (5) backwashing the pipeline.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1, the present application provides a seawater desalination apparatus, which comprises a multi-media filter 6, an activated carbon filter 7, a disc filter 8, an ultrafiltration system 9, an intermediate water tank 12 and a reverse osmosis system 18, which are arranged in sequence, wherein water produced by the ultrafiltration system 9 enters the reverse osmosis system 18 through the intermediate water tank 12, or is stored in the intermediate water tank 12 for back flushing of the ultrafiltration system 9.

The multi-media filter 6 can be filled with multiple layers of filter media, the bottommost layer is large-particle sand, coarse sand and fine sand are sequentially arranged on the large-particle sand, and the sand is finer as the sand goes upward. Mainly filters and adsorbs the granular substances, suspended substances and colloid in the water to remove, and reduces the turbidity.

The activated carbon can be used for adsorbing part of residual chlorine, micromolecular organic matters leaked from the previous stage and other polluting substances, has obvious adsorption and removal effects on peculiar smell, colloid, pigment, heavy metal ions and the like in water, and can well improve the taste of the water.

Wherein, the disc filter 8 can be formed by laminating the lamination sheets with certain filtering precision, when the filter water flows into the disc filter 8 through the filtering water inlet, the lamination sheets are tightly pressed together under the action of spring force and water force, the filtering medium of the previous filter is trapped at the intersection point of the lamination sheets, and the filtered water flows out from the main channel of the disc filter 8.

The disc filter 8 can effectively prevent 'missing' particle impurities and the like from entering the ultrafiltration system 9, and has a protection effect on the ultrafiltration membrane, and meanwhile, due to the arrangement of the 'multi-media filter 6+ activated carbon filter 7+ disc filter 8', the processing load of the ultrafiltration system 9 is effectively relieved, and the maintenance period and the service life of the ultrafiltration membrane are prolonged.

The sea water desalination equipment of this application can strengthen the effect of preliminary treatment through the filtration equipment of difference, and the cleaning function of cooperation filtration equipment can reduce equipment cleaning frequency, is favorable to improve equipment life.

In some embodiments, a first water supply pipe 101 is connected to a water inlet of the multi-media filter 6, and along a water supply direction of the first water supply pipe 101, a raw water tank 1, a first booster pump 2 and a pipeline mixer 3 are sequentially arranged on the first water supply pipe 101, and the pipeline mixer 3 is further connected with a bactericide feeding device 4 and a flocculant feeding device 5.

The bactericide delivery device 4 is used for delivering bactericide into the first water supply pipe 101 to kill algae, bacteria and the like in water. The flocculating agent feeding device 5 is used for synchronously feeding flocculating agents into the first water feeding pipe 101, so that impurities, particles and the like in seawater are gathered to form one block, and suspended matters, particle impurities and the like are more beneficial to subsequent filtering and removing. In order to ensure that the added medicament is fully mixed with the seawater, a pipeline mixer 3 is arranged to uniformly mix the added medicament with the seawater.

In some embodiments, a reducing agent dosing device 11 is connected to a water outlet of the ultrafiltration system 9.

The reducing agent feeding device 11 is used for feeding a reducing agent to a water outlet of the ultrafiltration system 9 to reduce residual chlorine in water produced by the ultrafiltration system 9, so that the water inlet requirement of the subsequent reverse osmosis system 18 is met.

In some embodiments, a second water supply pipe 102 is connected to a water outlet of the intermediate water tank 12, and a second booster pump 13, a scale inhibitor feeding device 14, a cartridge filter 15, a high-pressure pump 16 and the reverse osmosis system 18 are sequentially arranged on the second water supply pipe 102 along a water supply direction of the second water supply pipe 102.

Wherein, the antisludging agent feeding device 14 is used for feeding antisludging agent into the second water supply pipe 102. This is because the reverse osmosis process separates "H2O" from other ions into product water and concentrate water, which results in the increasing of the ion solubility on the concentrate side, and when some slightly soluble salts (such as CaCO3, CaSO4, BaSO4, etc. precipitate and separate out, so-called "scaling", occurs when the solubility product exceeds, so the scale inhibitor feeding device 14 is arranged behind the booster pump to prevent or relieve the scaling pollution of the reverse osmosis membrane system, maintain the stability of the system, and prolong the maintenance period.

In some embodiments, a first cleaning water tank 32 is further connected to the ultrafiltration system 9, and a first chemical cleaning liquid is stored in the first cleaning water tank 32 and used for chemically cleaning the ultrafiltration system 9; the reverse osmosis system 18 is further connected to a second cleaning water tank 29, and a second chemical cleaning solution is stored in the second cleaning water tank 29 and is used for chemically cleaning the reverse osmosis system 18.

The seawater desalination equipment is additionally provided with the chemical cleaning devices of the reverse osmosis system 18 and the ultrafiltration system 9, and is beneficial to removing accumulated pollutants on the membrane, so that the performance of the membrane is recovered. In this case, since strong oxidizing agents such as NaClO are required for chemical cleaning of the ultrafiltration membrane, and if the strong oxidizing agents remain in the pipeline, the polyamide reverse osmosis membrane is corroded and destroyed by the strong oxidizing agents when the reverse osmosis system 18 is cleaned, and thus different cleaning devices and cleaning reagents are used for the ultrafiltration system 9 and the reverse osmosis system 18, respectively.

As shown in fig. 2, for example, the ultrafiltration system 9 is connected to a first cleaning pipeline 104, and along the water supply direction, a first cleaning water tank 32, a first cleaning pump 33 and a first cleaning filter 34 are sequentially arranged on the first cleaning pipeline 104, a first chemical cleaning reagent is stored in the first cleaning water tank 32, and the first chemical cleaning reagent enters the ultrafiltration system 9 after passing through the first cleaning filter 34 under the power of the first cleaning pump 33 to filter large-particle impurities in the reagent, and performs cleaning operations such as circulation and soaking.

As shown in fig. 3, for example, the reverse osmosis system 18 is connected to a second cleaning pipeline 105, and a second cleaning water tank 29, a second cleaning pump 30 and a second cleaning filter 31 are sequentially arranged on the second cleaning pipeline 105 along a water supply direction, a second chemical cleaning reagent is stored in the second cleaning water tank 29, and the second chemical cleaning reagent enters the reverse osmosis system 18 after passing through the second cleaning filter 31 under the power of the second cleaning pump 30 to filter large particulate impurities in the reagent, so as to perform cleaning operations such as circulation and soaking.

In some embodiments, a water production tank 19 is connected to a water production port of the reverse osmosis system 18, and the water production tank 19 is used for storing water produced by the reverse osmosis system 18; a clean water cleaning pipeline 103 is connected between the water production tank 19 and the water inlet of the reverse osmosis system 18.

Wherein the cleaning pipe is used for cleaning the residual seawater in the reverse osmosis system 18 so as to avoid the corrosion of the reverse osmosis membrane by high-concentration chloride ions in a shutdown state.

In some embodiments, the water production tank 19 is further connected with a first water outlet pipe 106 for conveying water in the water production tank 19; the first water outlet pipe 106 is provided with a first constant pressure water supply system 20 for stabilizing the water supply pressure of the first water outlet pipe 106.

The seawater desalination equipment is provided with the constant-pressure water supply system on the water outlet pipe, and can stabilize the water supply pressure of the water outlet pipe, so that the water supply quality is improved.

In some embodiments, the water production tank 19 is further connected to a second water outlet pipe 107, and along the water outlet direction of the second water outlet pipe 107, a third pressurizing pump 21, a nanofiltration system 22 and a drinking water tank 23 are sequentially arranged on the second water outlet pipe 107, and the drinking water tank is further connected to a third water outlet pipe 108, and along the water outlet direction of the third water outlet pipe 108, a second constant pressure water supply system 39 and a sterilization device 26 are sequentially arranged on the third water outlet pipe 108.

The seawater desalination equipment provided by the application is provided with the first water outlet pipe 106 and the second water outlet pipe 107 on the water production tank 19, wherein water conveyed in the second water outlet pipe 107 can be further filtered by water output by the reverse osmosis system 18 under the filtration of the nanofiltration system 22, so that dual water supply is realized.

In some embodiments, the sterilization device 26 may be an ultraviolet sterilization device 26.

In some embodiments, the first constant pressure water supply system 20 and the second constant pressure water supply system 39 each include a water supply pump and a surge tank.

In some embodiments, the nanofiltration system 22 is further connected to the third cleaning water tank, and the third cleaning water tank stores a third chemical cleaning solution for chemically cleaning the nanofiltration system 22. In other embodiments, the reverse osmosis system 18 and the nanofiltration system may use the same cleaning reagent, and thus, the reverse osmosis system 18 and the nanofiltration system 22 may share a single cleaning water tank, e.g., the reverse osmosis system 18 and the nanofiltration system 22 share a second cleaning water tank 29, while meeting the requirements of cleaning reagent pressure, flow rate, etc.

In some embodiments, a branch water pipe 109 is connected to the water outlet of the cartridge filter 15 and the water inlet of the reverse osmosis system 18, an energy recovery device 17 and a fourth booster pump 28 are sequentially disposed on the branch water pipe 109 along the water flow direction of the branch water pipe 109, the concentrated water outlet of the reverse osmosis system 18 and the water inlet of the energy recovery device 17 are connected to a first concentrated water drain pipe, and the water outlet of the energy recovery device 17 is further connected to a second concentrated water drain pipe. Wherein the energy recovery device 17 may be a self-starting rotor type energy recovery device 17.

The utility model provides a sea water desalination equipment has increased branch water pipeline 109 and energy recuperation device 17, when will sending to the water of reverse osmosis system 18 and shunt, can follow the water recovery energy in the dense water and be used for the water of pressure boost reposition of redundant personnel to reduce high-pressure pump 16's power and energy consumption, thereby the energy saving reduces equipment load simultaneously.

In some embodiments, the ultrafiltration system 9 and the intermediate water tank 12 are further connected to a backwashing line 110, and a fifth booster pump 35 is disposed on the backwashing line 110, and is configured to deliver water in the intermediate water tank 12 to the ultrafiltration system 9 through the backwashing line 110 for backwashing.

In some embodiments, the ultrafiltration system 9 is further connected to a gas source 10, and the gas source 10 is used for cooperating with a backwashing pipeline 110 to carry out air-water backwashing.

In some embodiments, in order to ensure the operational performance of the filtering apparatus, the contaminants in the multimedia filter 6, the activated carbon filter 7 and the disc filter 8 may be washed with seawater while the first water supply pipe is supplied with water.

In some embodiments, the ultrafiltration system 9, the reverse osmosis system 18, the nanofiltration system 22 and each filter are provided with a wash drain, for example, the multimedia filter 6 is provided with a first wash drain 6-1, the activated carbon filter 7 is provided with a second wash drain 7-1, the disc filter 8 is provided with a third wash drain 8-1, the ultrafiltration system 9 is provided with a fourth wash drain 9-1, the reverse osmosis system 18 is provided with a fifth wash drain (also for draining the concentrate produced by the reverse osmosis system 18), and the nanofiltration system 22 is provided with a sixth wash drain (also for draining the concentrate produced by the nanofiltration system 22).

In some embodiments, corresponding valves (some of which are not shown) are also provided on the pipes for cooperating with equipment cleaning, backwashing, draining, and the like. For example, a shutdown purge valve 38 is disposed on the purge line, and during water production, the shutdown purge valve 38 is closed, and when it is necessary to purge the reverse osmosis system 18, water production is stopped and the shutdown purge valve 38 is opened. For another example, a first concentrate discharge regulating valve 36 is disposed on the first concentrate discharge pipe to control the concentrate recovery rate of the reverse osmosis system 18. Also for example, the purge discharge port of the nanofiltration system 22 is provided with a second concentrated water discharge regulating valve 37 for controlling the concentrated water recovery rate of the nanofiltration system 22.

In some embodiments, each valve and each constituent switch, etc. is separately connected to a controller for control of the system. The controller may be a PLC controller.

In some embodiments, the raw water tank 1, the intermediate water tank 12, the product water tank 19 and the drinking water tank 23 are all provided with a liquid level sensor 27 for monitoring the water level of each water tank, and the controller can perform on-off control according to the water level of each water tank.

In some embodiments, the seawater desalination apparatus further comprises a container housing, and other parts of the seawater desalination apparatus are mounted in the container housing, so that the seawater desalination apparatus is convenient to move and has good adaptability when placed outdoors.

The described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims (10)

1. The seawater desalination equipment is characterized by comprising a multi-media filter, an activated carbon filter, a disc filter, an ultrafiltration system, an intermediate water tank and a reverse osmosis system which are sequentially arranged, wherein water produced by the ultrafiltration system enters the reverse osmosis system through the intermediate water tank or is stored in the intermediate water tank and used for back washing of the ultrafiltration system.

2. The seawater desalination apparatus of claim 1, wherein the water inlet of the multi-media filter is connected with a first water supply pipe, and a raw water tank, a first booster pump and a pipeline mixer are sequentially arranged on the first water supply pipe along the water supply direction of the first water supply pipe, and the pipeline mixer is further connected with a bactericide feeding device and a flocculant feeding device.

3. The seawater desalination apparatus of claim 1, wherein a water outlet of the ultrafiltration system is connected to a reducing agent dosing device.

4. The seawater desalination apparatus of claim 1, wherein a water outlet of the intermediate water tank is connected with a second water supply pipe, and a second booster pump, a scale inhibitor feeding device, a cartridge filter, a high-pressure pump and the reverse osmosis system are sequentially arranged on the second water supply pipe along a water supply direction of the second water supply pipe.

5. The seawater desalination apparatus of claim 1, wherein the ultrafiltration system is further connected to a first cleaning water tank, and the first cleaning water tank stores a first chemical cleaning solution for chemically cleaning the ultrafiltration system; the reverse osmosis system is also connected with a second cleaning water tank, and a second chemical cleaning solution is stored in the second cleaning water tank and is used for chemically cleaning the reverse osmosis system.

6. The seawater desalination apparatus of claim 5, wherein the water production port of the reverse osmosis system is connected with a water production tank for storing water produced by the reverse osmosis system; and a clear water cleaning pipeline is connected between the water production tank and the water inlet of the reverse osmosis system.

7. The seawater desalination apparatus of claim 6, wherein the water production tank is further connected with a first water outlet pipe for conveying water in the water production tank; and the first water outlet pipe is provided with a first constant-pressure water supply system for stabilizing the water supply pressure of the first water outlet pipe.

8. The seawater desalination apparatus of claim 7, wherein the water production tank is further connected with a second water outlet pipe, and a third booster pump, a nanofiltration system and a drinking water tank are sequentially arranged on the second water outlet pipe along the water outlet direction of the second water outlet pipe, and the drinking water tank is further connected with a third water outlet pipe, and a second constant pressure water supply system and a sterilization device are sequentially arranged on the third water outlet pipe along the water outlet direction of the third water outlet pipe.

9. The seawater desalination apparatus of claim 8, wherein the nanofiltration system is further connected to a third cleaning water tank, and a third chemical cleaning solution is stored in the third cleaning water tank and used for chemically cleaning the nanofiltration system.

10. The seawater desalination apparatus of claim 4, wherein the water outlet of the cartridge filter and the water inlet of the reverse osmosis system are connected with a branch water pipeline, an energy recovery device and a fourth booster pump are sequentially arranged on the branch water pipeline along the water flow direction of the branch water pipeline, the concentrated water outlet of the reverse osmosis system and the water inlet of the energy recovery device are connected with a first concentrated water drain pipe, and the water outlet of the energy recovery device is further connected with a second concentrated water drain pipe.

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