CN117222467A - Filter tank and retractable underwater filter module with same - Google Patents
Filter tank and retractable underwater filter module with same Download PDFInfo
- Publication number
- CN117222467A CN117222467A CN202280030168.XA CN202280030168A CN117222467A CN 117222467 A CN117222467 A CN 117222467A CN 202280030168 A CN202280030168 A CN 202280030168A CN 117222467 A CN117222467 A CN 117222467A
- Authority
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- China
- Prior art keywords
- pressure vessel
- permeate
- end section
- inlet
- retentate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001914 filtration Methods 0.000 claims abstract description 43
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 239000012466 permeate Substances 0.000 claims description 107
- 239000012465 retentate Substances 0.000 claims description 61
- 239000007788 liquid Substances 0.000 claims description 57
- 239000000706 filtrate Substances 0.000 claims description 30
- 238000010612 desalination reaction Methods 0.000 claims description 27
- 239000012528 membrane Substances 0.000 claims description 25
- 239000013535 sea water Substances 0.000 claims description 14
- 238000001223 reverse osmosis Methods 0.000 claims description 13
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 239000012267 brine Substances 0.000 claims description 6
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 5
- 239000013505 freshwater Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/08—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/20—Specific housing
- B01D2313/201—Closed housing, vessels or containers
- B01D2313/2011—Pressure vessels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/24—Specific pressurizing or depressurizing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/54—Modularity of membrane module elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2315/00—Details relating to the membrane module operation
- B01D2315/06—Submerged-type; Immersion type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2317/00—Membrane module arrangements within a plant or an apparatus
- B01D2317/02—Elements in series
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2317/00—Membrane module arrangements within a plant or an apparatus
- B01D2317/04—Elements in parallel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2317/00—Membrane module arrangements within a plant or an apparatus
- B01D2317/06—Use of membrane modules of the same kind
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/066—Overpressure, high pressure
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nanotechnology (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Transplanting Machines (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Farming Of Fish And Shellfish (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to a subsea filter tank having a plurality of pressure vessels 1, the plurality of pressure vessels 1 forming at least one set of longitudinal pressure vessels. The first support plate 7 and the second support plate 8 comprise a plurality of fixed geometries 20, each of which supports an end section 17,6 of the pressure vessel. Each of the plurality of pressure vessels extends between a fixture on the first support plate and a fixture on the second support plate. Each set of pressure vessels comprises: at least one inlet pressure vessel, one end pressure vessel 14 adjacent to and in fluid connection with the intermediate pressure vessel 16, and a filter box frame clamping the first support plate 7 and the second support plate 8 to the plurality of pressure vessels. A filtration module having at least one filtration tank is also disclosed.
Description
Technical Field
The present invention relates to a subsea (subsea) filtration tank and a retrievable subsea filtration module having such a subsea filtration tank. The subsea filter module is particularly suitable for use with a subsea base plate (subsea template) of the type provided with a dedicated area.
Background
The subsea filter tank and the retrievable subsea filter module are particularly useful for desalination processes that utilize reverse osmosis membranes (RO-membranes) and hydrostatic pressure (hydrostatic pressure) to fully or partially pressurize seawater through the reverse osmosis membranes.
The use of pressure vessels with membranes under water also reduces the pressure rating required for the pressure vessel, as the pressure differential between the interior and exterior of the pressure vessel is reduced.
In the field of filtration, space may be a problem, and it is an object of the present invention to provide a more compact stack of pressure vessels with membranes than previous solutions. Since space may be limited and since large support vessels are typically required to deploy or retrieve large base trays and modules, the high space requirements may increase production and installation costs, and compact stacking is particularly useful when using pressure vessels with membranes in subsea modules.
Reverse Osmosis (RO) membranes can be placed in seawater at a depth that provides a hydrostatic pressure greater than the osmotic pressure (pi). In desalination, hydrostatic pressure greater than pi can be used to push water molecules through the RO membrane without additional pressure. Underwater desalination is advantageous in that the pump providing the water flow through the RO membrane may be located downstream of the RO membrane, so that the pump pumps only the desalinated water flow, not the whole seawater flow.
A typical reverse osmosis membrane pressure vessel has a permeate outlet located at the center of one short side opposite the inlet. Such a location requires access to the ends of the pressure vessel and such access places special demands on the stacking of the pressure vessels. It is an object of the present invention to eliminate this limitation to provide greater flexibility in pressure vessel stacking. Furthermore, the subsea filter tank of the present invention provides a compact structure which is suitable for use in a subsea module and which may be the basis for a plurality of pressure vessels and subsea filter tank arrangements.
Disclosure of Invention
The invention relates to an underwater filter tank having a plurality of longitudinal pressure vessels forming at least one set of longitudinal pressure vessels. Each pressure vessel includes a membrane, a first end section, and a second end section. Each first end section includes a first side surface and a first end section end surface. Each second end section includes a second side surface and a second end section end surface. The first end section end face faces away from the second end section end face.
At least one feed liquid inlet is located on the first end section side, at least one retentate outlet and at least one permeate/filtrate outlet are located on the second end section side. The subsea filter tank comprises a first support plate having a plurality of fixed geometries each supporting a first end section and a second support plate having a plurality of fixed geometries each supporting a second end section; thus, each pressure vessel of the plurality of pressure vessels extends between the fixed geometry of the first support plate and the fixed geometry of the second support plate. The at least one set of pressure vessels comprises: at least one inlet pressure vessel, said first end section of said inlet pressure vessel being flanked by at least one liquid outlet; at least one intermediate pressure vessel, the first end section of the intermediate pressure vessel being flanked by at least one liquid outlet; at least one permeate inlet located laterally of the second end section; at least one retentate inlet located laterally of the second end section, adjacent to and in fluid connection with the inlet pressure vessel. And a terminal pressure vessel adjacent to and fluidly connected to the intermediate pressure vessel. The clamping structure clamps the first support plate and the second support plate to the plurality of pressure vessels.
The inlet pressure vessel may be a 5-port pressure vessel, the end pressure vessel may be a 4-port pressure vessel, and the intermediate pressure vessel may be a 6-port pressure vessel.
The inlet pressure vessel may further comprise: a permeate/filtrate outlet located laterally of the second end section; the end pressure vessel may then comprise: a retentate inlet located laterally of the second end section.
The feed liquid inlet, retentate outlet and permeate/filtrate outlet of a pressure vessel may be connected to the feed liquid outlet, retentate inlet and permeate inlet of an adjacent pressure vessel, respectively, by detachable liquid couplings.
The detachable liquid coupling may provide a mechanical joint providing a rigid connection for mechanically securing the pressure vessels of the longitudinal pressure vessel group to each other.
Each pressure vessel may comprise: a permeate end cap sealing the permeate side of the pressure vessel. The permeate end cap may include: a permeate passage secured to the threaded portion of the permeate/filtrate outlet tube of the pressure vessel, the permeate passage having an end cap attachment bracket in the form of a tube having internal threads threaded to the permeate/filtrate outlet tube, the permeate passage having a port on a side that allows permeate to flow out of the tube, the permeate passage securing an end cap to the permeate/filtrate outlet tube.
The first end section end face may be parallel to the second end section end face.
The membrane may be a Reverse Osmosis (RO) membrane and the underwater filtration tank may be adapted for underwater desalination wherein the feed liquid is seawater, the retentate is brine (brine) and the permeate is fresh water.
Furthermore, the present invention relates to a retractable underwater filtration module having at least one filtration tank as described above, the retractable underwater filtration module comprising a plurality of sets of longitudinal pressure vessels, the retractable underwater filtration module further comprising: a feed liquid inlet header fluidly connected to each feed liquid inlet of each inlet pressure vessel. A retentate header is fluidly connected to each retentate outlet on one of the inlet pressure vessel or the terminal pressure vessel. The permeate header is fluidly connected to each permeate/filtrate outlet on one of the inlet pressure vessel or the terminal pressure vessel.
The filtration module may comprise two filtration tanks, wherein a first filtration tank of the two filtration tanks is located above a top of the second filtration tank, whereby a longitudinal centerline of each pressure vessel of the first filtration tank coincides with a longitudinal centerline of the pressure vessel of the second filtration tank.
The underwater filtering module may further include: an underwater desalination base having a retractable underwater filtration module region, a retentate outlet pipe extending from the desalination module, and permeate and service lines extending from the desalination base to a permeate receiving facility.
Furthermore, the invention relates to a longitudinal pressure vessel with a membrane. The first end section includes: a first side and a first end section end face. The second end section includes: a second side surface and a second end section end surface. The first end section end face faces away from the second end section end face. At least one feed liquid inlet is provided on the side of the first end section. The second end section is provided on the side with at least one retentate outlet and at least one permeate/filtrate outlet. At least one feed liquid outlet is provided on the side of the first end section, a retentate inlet (33) is provided on the side of the second end section, and a permeate inlet is provided on the side of the second end section.
The membrane may be a Reverse Osmosis (RO) membrane and the pressure vessel may be a desalination pressure vessel.
Drawings
FIG. 1 is a perspective view of a filter box of the present invention;
FIG. 2 is a perspective view of the bottom support plate;
FIG. 3 is a top view of the bottom support plate shown in FIG. 2;
FIG. 4 is a cross-sectional view A-A of the bottom support plate shown in FIG. 3;
FIG. 5 is a side view of a pressure vessel;
FIG. 6 is a cross-sectional view of the bottom of the pressure vessel;
FIG. 7 is a cross-sectional view of the first/top section of the pressure vessel;
FIGS. 8a, 8b and 8c are schematic illustrations of a row of six pressure vessels of various embodiments;
FIG. 9 is a perspective view of a subsea retractable filter tank module according to the invention, the module having two filter tanks as shown in FIG. 1;
FIG. 10 is a side view of a first side of the retractable filter box module shown in FIG. 9;
FIG. 11 is a side view of a second side of the retractable filter box module shown in FIG. 9; and
fig. 12 is a schematic view of an underwater desalination base plate with a retractable filter tank module of this invention.
Detailed Description
Fig. 1 is a perspective view of a filter box according to the present invention. The filter box comprises a plurality of pressure vessels 1. These pressure vessels 1 are present in 6 columns of 10 pressure vessels 1 each, and a total of 60 pressure vessels 1, forming ten rows and an arrangement of six pressure vessels 1 per row. Each pressure vessel comprises a liquid inlet 2, a retentate outlet 3 and a permeate/filtrate outlet 4, the liquid inlet 2 being located in the pressure vessel first section or pressure vessel top section 17, the retentate outlet 3 and the permeate/filtrate outlet 4 being located in the pressure vessel second section/bottom section 6. The intermediate section 5 of the pressure vessel is connected to the bottom section 6 of the pressure vessel and the top section 17 of the pressure vessel and holds the RO membrane.
Each of the ten rows includes four 6-port intermediate pressure vessels 16, one 4-port end pressure vessel 14 at the first "row end" and one 5-port inlet pressure vessel 15 at the second "row end". The 5-port inlet pressure vessel 15 provides an inlet port for liquid. The pressure vessels 1 in the same row are in fluid connection with each other to allow fluid to flow between the pressure vessels 1 and mechanically engage the pressure vessels to hold the pressure vessels 1 together in each row. The feed liquids are typically seawater, permeate (desalinated water) and brine (high salt concentration seawater). In addition to the three ports listed above, the 4-port pressure vessel 14 also includes a retentate inlet.
In addition to the three ports listed above, the 5-port pressure vessel 15 also includes a liquid outlet and a permeate inlet.
In addition to the three ports listed above, the 6-port pressure vessel 16 also includes a retentate inlet, a liquid outlet, and a permeate inlet.
The pressure vessels 1 are held between a first support plate/top support plate 7 and a second support plate/bottom support plate 8, both having circular grooves, so that a fixed geometry is formed for each pressure vessel 1. The first support plate/top support plate 7 and the second support plate/bottom support plate 8 are clamped together by means of clamping structures. The clamping structure may comprise an upper frame part 9 supporting the top support plate 7 and a lower frame part 10 supporting the bottom support plate 8. Each of the upper frame part 9 and the lower frame part 10 is connected to two middle frame parts 11 in four frame joints 12, which also form part of a clamping structure, clamping the components together. The pressure vessel support clamps 13 hold the pressure vessels in the outer column (4-port end pressure vessel 14 held to one middle frame portion 11, 5-port pressure vessel 15 held to the other middle frame portion 11). The pressure vessel support clamp 13 is typically a clamp that encloses the pressure vessel. Some of the pressure vessels include a retentate inlet 33 and a permeate inlet 34 for transferring liquid between the pressure vessels.
The embodiment of fig. 1 will also be applicable to other systems, such as a sulphate removal system, wherein the feed stream entering inlet 2 is filtered by any type of filter element placed inside the pressure vessel 1, forming a filtrate stream at outlet 4 and a retentate stream at outlet 3.
Fig. 2 is a perspective view of a bottom support plate 8, similar to the top support frame 7 shown in fig. 1. The bottom support plate 8 comprises a circular recess or fixed geometry 20 provided for each pressure vessel to be held by the support plate, in this case 60 fixed geometries 20, forming a pattern of six columns and ten rows of fixed geometries. These fixed geometries are consistent with each other.
The fixed geometry 20 is a geometry that prevents lateral and longitudinal displacement of the pressure vessel. The fixed geometry accommodates the shape and size of the end of the pressure vessel.
The approximate dimensions are included in fig. 3 and 4 to show the order of magnitude of the dimensions of the support plate.
Fig. 3 is a top view of the bottom support plate 8 shown in fig. 2. The distance c between the fixed geometries 20, each shaped as a circular groove, is typically 36cm. The width w of the plate is typically 230cm and the length l of the plate is typically 370cm.
Fig. 4 is a cross-sectional view A-A of the bottom support plate 8 shown in fig. 3, showing a diameter D of the fixed geometry 20 of 30cm and a diameter D of the hole through the support plate at the center of each groove of 3cm. The thickness t of the support plate is 13cm and the depth h of each groove is 6cm.
Fig. 5 is a side view of a pressure vessel having a liquid inlet 2, a retentate outlet 3, a permeate/filtrate outlet 4, a feed liquid outlet 32, a retentate inlet 33 and a permeate inlet 34. The top plug 35 allows liquid to enter the liquid inlet chamber of the pressure vessel. The permeate end cap 30 seals the permeate side of the pressure vessel and includes permeate channels. The pressure vessel comprises a first end section (top) 17 and a second end section (bottom) 6 of the pressure vessel.
Fig. 6 is a sectional view of the bottom section 6 of the pressure vessel. A retentate outlet 3, a retentate inlet 33, a permeate/filtrate outlet 4 and a permeate inlet 34 are shown. A permeate end cap 30 seals the permeate side of the pressure vessel, the permeate end cap 30 comprising a permeate passage 31, the permeate passage 31 extending from the bottom as a perforated hollow passage to direct flow from the inlet and outlet. The permeate end cap 30 includes the end face 22 of the second/bottom pressure vessel end section and the side face 24 of the second/bottom pressure vessel end section. The end section 30 is secured to the threaded portion of the permeate/filtrate outlet tube 38 of the pressure vessel by end cap attachment brackets 36; the end cap attachment bracket 36 is in the form of an internally threaded tube and is screwed onto the permeate/filtrate outlet tube 38 and is laterally ported to allow permeate to flow out of the tube. A gasket or seal 37 seals between the end section 30 and the end face of the pressure vessel. The end cap attachment brackets 36 hold the end cap 30 to the pressure vessel. The end cap 30 includes a tool attachment portion 25, such as a groove for inserting a hex wrench (hex key)/Allen key (Allen key) or a double offset wrench (Torx key).
Fig. 7 is a cross-sectional view of the pressure vessel first/top section 17. Feed inlet 2 and feed outlet 32 are shown. The top plug 35 allows feed liquid to enter the inlet chamber of the pressure vessel. The end face 21 of the first/top pressure vessel end section and the side face 23 of the first/top pressure vessel end section are shown.
In the 4-port pressure vessel 14 described in connection with fig. 1, the feed liquid outlet 32 and permeate inlet 34 are blocked or omitted.
In the 5-port pressure vessel 15 described in connection with fig. 1, the retentate inlet 33 is omitted or blocked.
Fig. 8a, 8b and 8c are schematic views of a row of six pressure vessels 1. These figures show different embodiments with slightly different outlet configurations. In fig. 8a, the pressure vessel comprises four intermediate 6-port pressure vessels 16, a 4-port end pressure vessel 14 at the first "row end", and a 5-port inlet pressure vessel 15 at the second "row end". These pressure vessels 1 in a row are fluidly connected to each other with a detachable liquid coupling 18 to allow seawater, permeate (desalinated water) and brine (high salt concentration seawater) (when the pressure vessels are used for desalinating) to flow between the pressure vessels 1, while mechanically connecting the pressure vessels, keeping the pressure vessels 1 in each row together. The ports at each of the feed liquid inlet 2, retentate outlet 3 and permeate/filtrate outlet 4 are provided with a detachable liquid coupling 18. In addition to the three ports listed above, the 4-port pressure vessel 14 also includes a retentate inlet 33. In addition to the three ports listed above, the 5-port pressure vessel 15 also includes a feed liquid outlet 32 and a permeate inlet 34. In addition to the three ports listed above, the 6-port pressure vessel 16 also includes a retentate inlet 33, a feed outlet 32, and a permeate inlet 34.
The detachable liquid coupling 18 may be in the form of a threaded connector, a clamping connector/connection clamp. Suitable coupling members may be the commercially available Victaulic connectors, victaulic being a trade name. A permeate end cap 30 is located at the bottom of each pressure vessel 1.
The only difference between the 6 pressure vessels 1 is the number of ports. All pressure vessels were the same size.
Figure 8b shows a different embodiment wherein the inlet pressure vessel 15 comprises 6 ports and comprises a permeate/filtrate outlet 4, a retentate outlet 3, a permeate inlet 34 and a retentate inlet 33. The end pressure vessel 14 includes only 3 ports and therefore has no retentate or permeate inlet.
Figure 8c shows a different embodiment wherein the inlet pressure vessel 15 comprises 4 ports and comprises a feed liquid outlet 32, a permeate/filtrate outlet 4 and a retentate outlet 3, but no permeate inlet or retentate inlet. The end pressure vessel 14 includes 5 ports and thus includes inlets and outlets for retentate and permeate (permeate inlet 34 and retentate inlet 33).
Fig. 9 is a perspective view of a filter box module according to the present invention having two filter boxes as shown in fig. 1, one above the other (with 14 rows of pressure vessels instead of 10 rows). The pressure vessels 1 are shown in 6 columns, with 14 pressure vessels 1 per column, for a total of 168 pressure vessels 1. Each of the 14 rows of pressure vessels 1 is fed with feed liquid through two inlet filters 40 and is each fluidly connected to one feed liquid header 42 of each layer of filter boxes. In fig. 9, there are two layers of filter boxes, and thus two feed headers 42. The feed header 42 includes a manifold (tube) and an inlet tube fluidly connected to the feed inlets 2 of each row of pressure vessels.
Permeate from each of the ten rows of pressure vessels 1 is directed into one permeate header 44 of each layer of filter boxes. In fig. 9, there are two layers of filter boxes, and thus two permeate headers 44. The permeate header 44 includes header tubes and one outlet tube fluidly connected to the permeate/filtrate outlet 4 of each row of pressure vessels.
The brine from each of the ten rows of pressure vessels 1 is directed into one retentate header 43 of each layer of filter boxes. In fig. 9, there are two layers of filter boxes, and thus two retentate headers 43. The retentate header 43 includes a header and one inlet tube fluidly connected to the retentate outlet of each row of pressure vessels.
The pressure vessel 1 is held between a first support plate/top support plate 7 and a second support plate/bottom support plate 8. Top support plate 7 and bottom support plate 8 are located in the upper frame portion 9 and lower frame portion 10, respectively, of each filter box.
Permeate base plate connector 45 and retentate base plate connector 46 are in fluid connection with permeate header 44 and retentate header 43, respectively. These base plate connectors 45, 46 connect to the desalination base plate when the subsea desalination module is mounted to the subsea desalination base plate.
The embodiment shown in fig. 9 is also applicable to other systems, wherein the incoming seawater flow through the seawater inlet filter 40 is filtered by any type of filter cartridge placed in the pressure vessel 1, wherein the flow is discharged from the base plate connection 45 and the retentate is discharged at the outlet 46.
Fig. 10 is a side view of a first side of the filter box module shown in fig. 9, and fig. 11 is a side view of a second side of the filter box module shown in fig. 9. Each filter box comprises a top plate 7, a top frame 9, a bottom plate 8 and a bottom frame 10. Valves and liquid parameter sensors are located in the flow path between the retentate header 43 and the retentate base plate connection 46. Valves and liquid parameter sensors are located in the flow path between permeate header 44 and permeate base disk connection 45. The seawater header 42 is in fluid connection with the seawater inlet strainer 40.
The liquid parameter sensor may include a temperature sensor, a salinity sensor, a pressure sensor, a mass flow sensor, a pollution sensor, and the like.
Fig. 12 is a schematic view of a subsea desalination substrate 50 with a retractable filter module 51 of the present invention positioned in a retractable subsea filter module area 57. The filtration module 51 may be deployed by a support/service vessel 55 or retrieved from a desalination base. A retentate outlet line 53 extends from the desalination module 50 to a location remote from the feed liquid inlet of the filtration module 51. Permeate and service line 52 extends from the desalination base plate to permeate receiving facility 54. Permeate receiving facilities 54. A control station 56 may be connected to the subsea desalination substrate 50 and provide power and control for the subsea desalination substrate 50. The subsea desalination substrate 50 may form part of a system having one or more circulation pumps for feed liquid, one or more transfer pumps for permeate, a separate inlet filter, an operation monitoring system, etc.
The subsea base plate 50 may comprise a dedicated area for the filtration module 51 of the present invention and may comprise a connection for at least one of a permeate inlet, a retentate inlet or a feed liquid outlet.
The pressure vessel is an RO pressure vessel for desalinating water. Other filtration pressure vessels may be used with the present invention.
The above description was made for desalination purposes by installing RO membranes in a pressure vessel. In other systems, other types of membranes may be installed, and thus the description may be different.
| 1 | Pressure vessel | 25 | Tool attachment |
| 2 | Feed liquid inlet | 30 | End cover of permeable object |
| 3 | Retentate outlet | 31 | Permeate channel |
| 4 | Permeate/filtrate outlet | 32 | Feed liquid outlet |
| 5 | Intermediate section of pressure vessel | 33 | Retentate inlet |
| 6 | Second end section | 34 | Permeate inlet |
| 7 | First support plate | 35 | Top plug |
| 8 | Second support plate | 36 | End cap attachment bracket |
| 9 | Upper frame part | 37 | End cap seal |
| 10 | Lower frame part | 38 | Permeate/filtrate outlet pipe |
| 11 | Middle frame part | 40 | Feed liquid inlet filter |
| 12 | Frame joint | 42 | Feed liquid header |
| 13 | Pressure vessel support clip | 43 | Retentate header |
| 14 | 4-port end pressure vessel | 44 | Permeate header |
| 15 | 5-port inlet pressure vessel | 45 | Permeate base plate connector |
| 16 | 6-port intermediate pressure vessel | 46 | Retentate base plate connector |
| 17 | First end section | 50 | Desalination base plate |
| 18 | Detachable liquid coupling | 51 | Filtering module |
| 20 | Fixed geometry/circular groove | 52 | Permeate and service pipeline |
| 21 | End face of first end section | 53 | Retentate outlet pipe |
| 22 | End face of the second end section | 54 | Permeate receiving facility |
| 23 | Side of the first end section | 55 | Support forShip |
| 24 | Side of the second end section | 56 | Control station |
| 57 | Retractable subsea filtration module area |
Claims (13)
1. An underwater filtration tank having a plurality of longitudinal pressure vessels (1) forming at least one set of longitudinal pressure vessels, wherein each pressure vessel (1) comprises a membrane, a first end section (17) and a second end section (6);
wherein each of said first end sections (17) comprises a first side surface (23) and a first end section end surface (21);
wherein each of said second end sections (6) comprises a second side face (24) and a second end section end face (22);
wherein the first end section end face (21) faces away from the second end section end face (22);
at least one feed liquid inlet (2) on the first end section side (23);
at least one retentate outlet (3) and at least one permeate/filtrate outlet (4) on the second end section side (24);
the underwater filter tank includes:
-a first support plate (7) having a plurality of fixed geometries (20), each of said fixed geometries (20) supporting a first end section (17);
-a second support plate (8) having a plurality of fixed geometries (20), each of said fixed geometries (20) supporting a second end section (6); whereby each pressure vessel of the plurality of pressure vessels extends between a fixed geometry (20) of the first support plate (7) and a fixed geometry (20) of the second support plate (8);
wherein the at least one set of pressure vessels comprises at least:
an inlet pressure vessel (15) having at least one feed liquid outlet (32) on the side (23) of the first end section;
at least one intermediate pressure vessel (16), the intermediate pressure vessel (16) having at least one feed liquid outlet (32) on the first end section side (23);
at least one permeate inlet (34) on the second end section side (24);
at least one retentate inlet (33) on the second end section side (24), adjacent to and in fluid connection with the inlet pressure vessel (15);
an end pressure vessel (14) adjacent to and fluidly connected to an intermediate pressure vessel (16);
and a clamping structure for clamping the first support plate (7) and the second support plate (8) to the plurality of pressure vessels (1).
2. The subsea filter tank according to claim 1, characterized in that the inlet pressure vessel (15) is a 5-port pressure vessel, the end pressure vessel (14) is a 4-port pressure vessel, and the at least one intermediate pressure vessel (16) is a 6-port pressure vessel.
3. The subsea filtration tank according to claim 2, characterized in that the inlet pressure vessel (15) further comprises a permeate/filtrate outlet (4), the permeate/filtrate outlet (4) being located on the second end section side (24), the terminal pressure vessel (14) comprising a retentate inlet (33), the retentate inlet (33) being located on the second end section side (24).
4. The submerged filter tank according to claim 1, characterized in that the feed liquid inlet (2), the retentate outlet (3) and the permeate/filtrate outlet (4) of a pressure vessel are connected to the feed liquid outlet (32), the retentate inlet (33) and the permeate inlet (34) of an adjacent pressure vessel, respectively, by means of detachable liquid couplings (18).
5. A subsea filter tank according to claim 4, characterized in that the detachable liquid coupling (18) provides a mechanical joint providing a rigid connection for mechanically fixing the pressure vessels of the longitudinal pressure vessel group to each other.
6. The subsea filtration tank according to any of the preceding claims, characterized in that each pressure vessel comprises a permeate end cap (30), the permeate end caps (30) sealing the permeate side of the pressure vessel (1), the permeate end caps (30) comprising permeate channels (31), the permeate channels (31) being fixed to threaded portions of permeate/filtrate outlet pipes (38) of the pressure vessel, thereby holding the end caps (30) to the permeate/filtrate outlet pipes (38), the permeate channels (31) having end cap attachment brackets (36) in the form of pipes, the end cap attachment brackets (36) having internal threads threaded to the permeate/filtrate outlet pipes (38), the permeate channels (31) having ports on the sides, which ports allow the permeate to flow out of the pipes.
7. A subsea filter tank according to any of the preceding claims, in which the first end section end face is parallel to the second end section end face.
8. The subsea filtration tank of any of the preceding claims, characterized in that the membrane is a Reverse Osmosis (RO) membrane, wherein the subsea filtration tank is adapted for subsea desalination of sea water, wherein the feed liquid is sea water, the retentate is concentrated brine, and the permeate is fresh water.
9. A retractable underwater filtration module having at least one underwater filtration tank as claimed in any of claims 1 to 8, said retractable underwater filtration module comprising a plurality of sets of longitudinal pressure containers (1), further comprising:
a liquid inlet header (42) in liquid connection with each liquid inlet (2) on each inlet pressure vessel (15);
a retentate header (43) in fluid connection with each retentate outlet (3) on one of each inlet pressure vessel (15) or each end pressure vessel (14); and
a permeate header (44) in fluid connection with each permeate/filtrate outlet (4) on one of each inlet pressure vessel (15) or each end pressure vessel (14).
10. The retractable underwater filtration module of claim 9 comprising two underwater filtration tanks, wherein a first underwater filtration tank of the two underwater filtration tanks is located on top of a second underwater filtration tank, whereby a longitudinal centerline of each pressure vessel of the first underwater filtration tank coincides with a longitudinal centerline of a pressure vessel of the second underwater filtration tank.
11. The retractable underwater filtration module of claim 9 or 10, further comprising:
-an underwater desalination base (50), the underwater desalination base (50) having a retractable underwater filtration module region (57);
-a retentate outlet pipe (53), the retentate outlet pipe (53) extending from the desalination module (50); and
a permeate and service line (52), the permeate and service line (52) extending from the desalination substrate to a permeate receiving facility (54).
12. A longitudinal pressure vessel (1), comprising:
a membrane;
a first end section (17) comprising a first side surface (23) and a first end section end surface (21);
a second end section (6) comprising a second side (24) and a second end section end face (22);
wherein the first end section end face (21) faces away from the second end section end face (22);
at least one feed liquid inlet (2) located on the first end section side (23);
at least one retentate outlet (3) and at least one permeate/filtrate outlet (4) located on the side (24) of the second end section;
at least one feed liquid outlet (32) located on the first end section side (23);
a retentate inlet (33) located on the second end section side (24); and
a permeate inlet (34) located on the second end section side (24).
13. The longitudinal pressure vessel (1) according to claim 12, characterized in that the membrane is an RO-membrane and the pressure vessel is a desalination pressure vessel (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20210496 | 2021-04-23 | ||
| NO20210496A NO20210496A1 (en) | 2021-04-23 | 2021-04-23 | A filter-box and a retrievable subsea filter module with a filter-box |
| PCT/NO2022/050091 WO2022225404A1 (en) | 2021-04-23 | 2022-04-25 | A filter-box and a retrievable subsea filter module with a filter-box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117222467A true CN117222467A (en) | 2023-12-12 |
Family
ID=83722557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280030168.XA Pending CN117222467A (en) | 2021-04-23 | 2022-04-25 | Filter tank and retractable underwater filter module with same |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP4326423A1 (en) |
| JP (1) | JP2024517650A (en) |
| KR (1) | KR20230175243A (en) |
| CN (1) | CN117222467A (en) |
| AU (1) | AU2022261696A1 (en) |
| BR (1) | BR112023021744A2 (en) |
| CL (1) | CL2023003103A1 (en) |
| IL (1) | IL307718A (en) |
| NO (1) | NO20210496A1 (en) |
| WO (1) | WO2022225404A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4476015A (en) * | 1982-11-02 | 1984-10-09 | V. J. Ciccone & Associates, Inc. | Multiple element fluid separation device |
| SE510324C2 (en) * | 1997-06-19 | 1999-05-10 | Electrolux Ab | Method and apparatus for purifying a fluid |
| KR20090117944A (en) * | 2007-02-14 | 2009-11-16 | 디엑스브이 워터 테크놀로지즈, 엘엘씨 | Depth exposed membrane for water extraction |
| WO2015044783A2 (en) * | 2013-09-26 | 2015-04-02 | Alto Solution Sa | Self supporting structure |
| NO344863B1 (en) * | 2018-10-12 | 2020-06-02 | Waterise As | Modularized subsea seawater desalination system |
| EP3896250A1 (en) * | 2020-04-14 | 2021-10-20 | National Oilwell Varco Norway AS | Processing seawater subsea |
-
2021
- 2021-04-23 NO NO20210496A patent/NO20210496A1/en unknown
-
2022
- 2022-04-25 WO PCT/NO2022/050091 patent/WO2022225404A1/en active Application Filing
- 2022-04-25 AU AU2022261696A patent/AU2022261696A1/en active Pending
- 2022-04-25 CN CN202280030168.XA patent/CN117222467A/en active Pending
- 2022-04-25 KR KR1020237039459A patent/KR20230175243A/en unknown
- 2022-04-25 IL IL307718A patent/IL307718A/en unknown
- 2022-04-25 BR BR112023021744A patent/BR112023021744A2/en unknown
- 2022-04-25 JP JP2023564250A patent/JP2024517650A/en active Pending
- 2022-04-25 EP EP22792086.5A patent/EP4326423A1/en active Pending
-
2023
- 2023-10-18 CL CL2023003103A patent/CL2023003103A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| KR20230175243A (en) | 2023-12-29 |
| CL2023003103A1 (en) | 2024-03-15 |
| IL307718A (en) | 2023-12-01 |
| BR112023021744A2 (en) | 2023-12-26 |
| EP4326423A1 (en) | 2024-02-28 |
| NO20210496A1 (en) | 2022-10-24 |
| JP2024517650A (en) | 2024-04-23 |
| WO2022225404A1 (en) | 2022-10-27 |
| AU2022261696A1 (en) | 2023-11-02 |
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