WO2021245437A1 - Desalination arrangement - Google Patents

Desalination arrangement Download PDF

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Publication number
WO2021245437A1
WO2021245437A1 PCT/IB2020/055162 IB2020055162W WO2021245437A1 WO 2021245437 A1 WO2021245437 A1 WO 2021245437A1 IB 2020055162 W IB2020055162 W IB 2020055162W WO 2021245437 A1 WO2021245437 A1 WO 2021245437A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
sea
reverse osmosis
desalination
pumping
Prior art date
Application number
PCT/IB2020/055162
Other languages
French (fr)
Inventor
Michael Phillip STOKES
Paul Stokes
Original Assignee
Stokes Michael Phillip
Paul Stokes
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Stokes Michael Phillip, Paul Stokes filed Critical Stokes Michael Phillip
Priority to PCT/IB2020/055162 priority Critical patent/WO2021245437A1/en
Publication of WO2021245437A1 publication Critical patent/WO2021245437A1/en

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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
    • 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
    • B01D61/04—Feed pretreatment
    • 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
    • B01D61/12—Controlling or regulating
    • 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
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • 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
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/04—Backflushing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/10—Spiral-wound membrane modules
    • 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
    • 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
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/05—Conductivity or salinity
    • 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

Definitions

  • the present invention relates to a desalination arrangement.
  • the present invention relates to a desalination arrangement for desalinating seawater and reducing the energy requirements and thus costs per unit of freshwater produced.
  • Desalination is a process that takes away mineral components from saline water. More generally, desalination refers to the removal of salts and minerals from a target substance, as in soil desalination, which is an issue for agriculture.
  • Saltwater is desalinated to produce water suitable for human consumption or irrigation.
  • the by-product of the desalination process is brine.
  • Desalination is used on many seagoing ships and submarines. Most of the modern interest in desalination is focused on cost-effective provision of fresh water for human use. Along with recycled wastewater, it is one of the few rainfall-independent water sources.
  • Desalination processes are usually driven by either thermal (in the case of distillation) or electrical (in the case of reverse osmosis) as the primary energy types.
  • the methods can be divided into membrane-based (e.g., reverse osmosis) and thermal-based (e.g., multistage flash distillation) methods.
  • membrane-based e.g., reverse osmosis
  • thermal-based e.g., multistage flash distillation
  • desalination is distillation, i.e. boiling and re-condensation of seawater to leave salt and impurities behind.
  • the primary cost drivers include:
  • RO reverse osmosis
  • a desalination arrangement for desalinating sea-water includes
  • reverse osmosis means including offshore modular reverse osmosis filtration units
  • the desalination arrangement may be a sub-sea plant.
  • the reverse osmosis filtration units may be modular and/or expandable.
  • the pre-treatment and high-pressure sea water pumping means may be located offshore below the surface at a depth of between 600 and 800 meters.
  • the reverse osmosis means may include flat panel membranes.
  • the reverse osmosis means may be adapted to provide:
  • the desalination arrangement may include control systems.
  • the control systems may include automatic and land-based control systems adapted to monitor permeate water quality and shut down out of specification modules for cleaning cycle or maintenance.
  • the control systems may include salinity sensors and control valves for each module.
  • the desalination arrangement may be adapted to:
  • the modular design of the reverse osmosis means of the desalination arrangement may be adapted and optimized for deep sea control and recovery systems for maintenance.
  • the desalination arrangement may be adapted and optimizes to
  • the desalination arrangement may be adapted to reduce the energy requirements and thus costs per unit of freshwater produced.
  • Figure 1 known membrane desalination and energy recovery systems
  • Figure 2 the first cost drivers in the reverse osmosis (RO) desalination process
  • Figure 3 the second cost drivers in the reverse osmosis (RO) desalination process
  • Figure 4 a conventional reverse osmosis system having a pre-treatment and high- pressure sea water pumping means
  • Figure 5 the desalination arrangement according to the invention in which the pre treatment and high-pressure sea water pumping means is moved offshore to a depth of between 600 and 800 meters below the surface;
  • FIG. 6 the components of the desalination arrangement according to the invention.
  • Figure 7 an enlarged view of the modular and expandable installation of the reverse osmosis filtration units of the desalination arrangement of the invention
  • FIG. 8 conventional spiral wound membranes
  • FIG. 9 new flat panel membranes of the desalination arrangement according to the invention.
  • FIG. 10 control systems of the desalination arrangement according to the invention.
  • Figure 4 shows a conventional reverse osmosis system having a pre-treatment and high-pressure seawater pumping means.
  • the invention effectively gets rid of the pre- treatment and high-pressure sea water pumping requirements.
  • the pre treatment and high-pressure sea water pumping means is moved offshore to a depth of between 600 and 800 meters below the surface as shown in Figure 5. Thereby the energy input requirements for the process would now be limited to only pumping the final product/permeate from the sub se plant out to land or a platform.
  • FIG. 6 illustrates the desalination arrangement including the following components:
  • Figure 7 shows an enlarged view of the modular and expandable installation of the reverse osmosis filtration units.
  • the new flat panel membranes of the desalination arrangement according to the invention provides:
  • control systems of the desalination arrangement as shown in Figure 10 includes automatic and land-based control systems monitor permeate water quality and shut down out of specification modules for cleaning cycle or maintenance. It furthermore includes salinity sensors and control valves for each module.
  • Benefits of the desalination arrangement according to the invention include the following:
  • the modular design of the reverse osmosis means is optimized for deep sea control and recovery systems for maintenance.
  • the filter final design and configuration is optimized for:

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nanotechnology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses a desalination arrangement for desalinating sea-water, which includes reverse osmosis means including offshore modular reverse osmosis filtration units; a pre-treatment and high-pressure sea water pumping means located offshore below the surface; pumping means for pumping the final product/permeate to land or a platform; permeate collection sump and pumping units; and a land-based post treatment plant with monitoring and control systems. The reverse osmosis filtration units are modular and/or expandable. The pre-treatment and high-pressure sea water pumping means are located offshore below the surface at a depth of between 600 and 800 meters.

Description

DESALINATION ARRANGEMENT
FIELD OF INVENTION
The present invention relates to a desalination arrangement.
More particularly, the present invention relates to a desalination arrangement for desalinating seawater and reducing the energy requirements and thus costs per unit of freshwater produced.
BACKGROUND TO INVENTION
With the growth of world population and the limited availability of fresh water, this is becoming one of the serious challenges of our generation. Of the 71% earth surface water, 97.4% is sea water and only 2.6% is fresh water.
Desalination is a process that takes away mineral components from saline water. More generally, desalination refers to the removal of salts and minerals from a target substance, as in soil desalination, which is an issue for agriculture.
Saltwater is desalinated to produce water suitable for human consumption or irrigation. The by-product of the desalination process is brine. Desalination is used on many seagoing ships and submarines. Most of the modern interest in desalination is focused on cost-effective provision of fresh water for human use. Along with recycled wastewater, it is one of the few rainfall-independent water sources.
Due to its energy consumption, desalinating sea water is generally more costly than fresh water from rivers or groundwater, water recycling and water conservation. However, these alternatives are not always available, and depletion of reserves is a critical problem worldwide. Desalination processes are usually driven by either thermal (in the case of distillation) or electrical (in the case of reverse osmosis) as the primary energy types.
Currently, approximately 1% of the world's population is dependent on desalinated water to meet daily needs, but the UN expects that 14% of the world's population will encounter water scarcity by 2025. Desalination is particularly relevant in dry countries such as Australia, which traditionally have relied on collecting rainfall behind dams for water. Kuwait produces a higher proportion of its water through desalination than any other country, totalling 100% of its water use.
There are several methods of which each has advantages and disadvantages, but all are useful. The methods can be divided into membrane-based (e.g., reverse osmosis) and thermal-based (e.g., multistage flash distillation) methods. The traditional process of desalination is distillation, i.e. boiling and re-condensation of seawater to leave salt and impurities behind.
For many parts of the word it is imperative that a simpler and more cost-effective method be found to desalinate sea water. Notwithstanding rapid progress in the development and deployment of membrane desalination and energy recovery systems in recent years (as shown in Figure 1 ), there are still persistent fundamental and practical challenges in terms of cost effectiveness and sustainability. The main challenge remains the high cost per unit of fresh water produced. The primary cost drivers include:
(a) High energy input requirements
(b) Reverse Osmosis Filter membrane fouling
(c) Brine disposal management
(d) Pre-treatment requirements of sea water
The cost drivers in the reverse osmosis (RO) desalination process are shown in Figures 2 and 3. For the typical RO plant, 75 to 85 % of energy is consumed in the high-pressure pumping stage where high volumes of water is to be pumped at up to 80 bar. Energy Consumption and RO filter replacements contribute up to 90% of operational costs.
It is an object of the invention to disclose a desalination arrangement adapted to overcome the aforementioned problems and which is adapted to reduce the energy requirements and thus costs per unit of freshwater produced.
SUMMARY OF INVENTION
According to the invention, a desalination arrangement for desalinating sea-water includes
(a) reverse osmosis means including offshore modular reverse osmosis filtration units;
(b) a pre-treatment and high-pressure sea water pumping means located offshore below the surface;
(c) pumping means for pumping the final product/permeate to land or a platform; (d) permeate collection sump and pumping units; and
(a) a land-based post treatment plant with monitoring and control systems.
The desalination arrangement may be a sub-sea plant.
The reverse osmosis filtration units may be modular and/or expandable.
The pre-treatment and high-pressure sea water pumping means may be located offshore below the surface at a depth of between 600 and 800 meters.
The reverse osmosis means may include flat panel membranes.
The reverse osmosis means may be adapted to provide:
(a) High Surface area exposure in unlimited high pressure zone;
(b) Longer service life due to passive linear flow;
(c) Effective cleaning function via regular reverse flow flushing.
The desalination arrangement may include control systems.
The control systems may include automatic and land-based control systems adapted to monitor permeate water quality and shut down out of specification modules for cleaning cycle or maintenance.
The control systems may include salinity sensors and control valves for each module.
The desalination arrangement may be adapted to:
(a) Significantly reduced energy requirements due to only pumping fresh water from installation; (b) Longer filter and membrane service life;
(c) No pre-treatment;
(d) Water quality offshore at depth;
(e) No Brine water to dispose of; and/or
(f) Reduced environmental impact.
The modular design of the reverse osmosis means of the desalination arrangement may be adapted and optimized for deep sea control and recovery systems for maintenance.
The desalination arrangement may be adapted and optimizes to
(a) lower water temperatures
(b) Screen filter for micro biological entities
(c) Reverse flow flushing
The desalination arrangement may be adapted to reduce the energy requirements and thus costs per unit of freshwater produced.
BRIEF DESCRIPTION OF DRAWINGS
The invention will now be described by way of example with reference to the accompanying schematic drawings.
In the drawings, there is shown in:
Figure 1 : known membrane desalination and energy recovery systems;
Figure 2: the first cost drivers in the reverse osmosis (RO) desalination process; Figure 3: the second cost drivers in the reverse osmosis (RO) desalination process;
Figure 4: a conventional reverse osmosis system having a pre-treatment and high- pressure sea water pumping means;
Figure 5: the desalination arrangement according to the invention in which the pre treatment and high-pressure sea water pumping means is moved offshore to a depth of between 600 and 800 meters below the surface;
Figure 6: the components of the desalination arrangement according to the invention;
Figure 7: an enlarged view of the modular and expandable installation of the reverse osmosis filtration units of the desalination arrangement of the invention;
Figure 8: conventional spiral wound membranes;
Figure 9: new flat panel membranes of the desalination arrangement according to the invention; and
Figure 10: control systems of the desalination arrangement according to the invention.
DETAILED DESCRIPTION OF DRAWINGS
According to the invention a desalination arrangement for desalinating sea-water and reducing the energy requirements and thus costs per unit of freshwater produced is shown.
Figure 4 shows a conventional reverse osmosis system having a pre-treatment and high-pressure seawater pumping means. The invention effectively gets rid of the pre- treatment and high-pressure sea water pumping requirements. In the invention the pre treatment and high-pressure sea water pumping means is moved offshore to a depth of between 600 and 800 meters below the surface as shown in Figure 5. Thereby the energy input requirements for the process would now be limited to only pumping the final product/permeate from the sub se plant out to land or a platform.
Figure 6 illustrates the desalination arrangement including the following components:
(b) Offshore modular reverse osmosis filtration units;
(c) Permeate collection sump and pumping units; and
(d) Land-based post treatment plant with monitoring and control systems.
Figure 7 shows an enlarged view of the modular and expandable installation of the reverse osmosis filtration units.
Reverse Osmosis Filter Differences: Conventional Spiral Wound Membranes as shown in Figure 8 include a compact spiral wound configuration to increase surface area per high pressure zone which inherently leads to:
(a) Reduced life with high pressure tangential flow across surface of membranes and fouling; and
(b) Limited options for filter cleaning/flushing; and
(c) Concentration polarization layer forming.
As shown in Figure 9, the new flat panel membranes of the desalination arrangement according to the invention provides:
(d) High Surface area exposure in unlimited high-pressure zone; (e) Longer service life due to passive linear flow;
(f) Effective cleaning function via regular reverse flow flushing.
The control systems of the desalination arrangement as shown in Figure 10 includes automatic and land-based control systems monitor permeate water quality and shut down out of specification modules for cleaning cycle or maintenance. It furthermore includes salinity sensors and control valves for each module.
Benefits of the desalination arrangement according to the invention include the following:
(g) Significantly reduced energy requirements due to only pumping fresh water from installation;
(h) Longer filter and membrane service life;
(i) No Pre-treatment;
(j) Water quality offshore at depth;
(k) No Brine water to dispose of ; and
(L) Reduced environmental impact.
The modular design of the reverse osmosis means is optimized for deep sea control and recovery systems for maintenance.
The filter final design and configuration is optimized for:
(d) lower water temperatures
(e) Screen filter for micro biological entities
(f) Reverse flow flushing The desalination arrangement according to the invention is a concept proposal of a new and revolutionary approach to desalination whereby reducing the energy requirements and thus costs per unit of freshwater produced.

Claims

PATENT CLAIMS
1. A desalination arrangement for desalinating sea-water, which includes
(a) reverse osmosis means including offshore modular reverse osmosis filtration units;
(b) a pre-treatment and high-pressure sea water pumping means located offshore below the surface;
(c) pumping means for pumping the final product/permeate to land or a platform;
(d) permeate collection sump and pumping units; and
(e) a land-based post treatment plant with monitoring and control systems.
2. A desalination arrangement as claimed in claim 1 , in which includes a sub-sea plant.
3. A desalination arrangement as claimed in claim 1 or claim 2, in which the reverse osmosis filtration units are modular and/or expandable.
4. A desalination arrangement as claimed in any one of the preceding claims, in which the pre-treatment and high-pressure sea water pumping means are located offshore below the surface at a depth of between 600 and 800 meters.
5. A desalination arrangement as claimed in any one of the preceding claims, in which the reverse osmosis means includes flat panel membranes.
6. A desalination arrangement as claimed in any one of the preceding claims, in which the reverse osmosis means is adapted to provide:
(a) High Surface area exposure in unlimited high-pressure zone;
(b) Longer service life due to passive linear flow; and/or
(c) Effective cleaning function via regular reverse flow flushing.
7. A desalination arrangement as claimed in any one of the preceding claims, which includes control systems.
8. A desalination arrangement as claimed in claim 7, in which the control systems include automatic and land-based control systems adapted to monitor permeate water quality and shut down out of specification modules for cleaning cycle or maintenance.
9. A desalination arrangement as claimed in claim 7or claim 8, in which the control systems include salinity sensors and control valves for each module.
10. A desalination arrangement as claimed in any one of the preceding claims, which is adapted to:
(a) Significantly reduced energy requirements due to only pumping fresh water from installation;
(b) Longer filter and membrane service life;
(c) No pre-treatment;
(d) Water quality offshore at depth;
(e) No Brine water to dispose of; and/or
(f) Reduced environmental impact.
11. A desalination arrangement as claimed in any one of the preceding claims, in which the modular design of the reverse osmosis means of the desalination arrangement is adapted and optimized for deep sea control and recovery systems for maintenance.
12. A desalination arrangement as claimed in any one of the preceding claims, which is adapted to
(a) lower water temperatures; (b) Screen filter for micro biological entities; and/or
(c) Reverse flow flushing.
13. A desalination arrangement as claimed in any one of the preceding claims, which is adapted to reduce the energy requirements and thus costs per unit of freshwater produced.
14. A method for desalinating sea-water, which includes the steps
(a) of reverse osmosis in reverse osmosis means including offshore modular reverse osmosis filtration units;
(b) of pre-treatment and high-pressure sea water pumping in pre-treatment and high-pressure sea water pumping means located offshore below the surface;
(c) of pumping the final product/permeate to land or a platform;
(d) of collecting the permeate in a collection sump and pumping units; and
(e) of post treating in a land-based post treatment plant with monitoring and control systems.
15. A method for desalinating sea-water as claimed in claim 14, in which some of the steps are performed in a sub-sea plant.
16. A method for desalinating sea-water as claimed in claim 14 or claim 15, in which the reverse osmosis filtration units are modular and/or expandable.
17. A method for desalinating sea-water as claimed in any one of claims 14 to 16, in which the pre-treatment and high-pressure sea water pumping means are located offshore below the surface at a depth of between 600 and 800 meters.
18. A method for desalinating sea-water as claimed in any one of claims 14 to 17, in which the reverse osmosis means includes flat panel membranes.
19. A method for desalinating sea-water as claimed in any one of claims 14 to 18, in which the reverse osmosis means is adapted to provide:
(a) High Surface area exposure in unlimited high-pressure zone;
(b) Longer service life due to passive linear flow; and/or
(c) Effective cleaning function via regular reverse flow flushing.
20. A method for desalinating sea-water as claimed in any one of claims 14 to 19, which includes control systems.
21 .A method for desalinating sea-water as claimed in claim 20, in which the control systems include automatic and land-based control systems adapted to monitor permeate water quality and shut down out of specification modules for cleaning cycle or maintenance.
22. A method for desalinating sea-water as claimed in claim 20 or claim 21 , in which the control systems include salinity sensors and control valves for each module.
23. A method for desalinating sea-water as claimed in any one of claims 14 to 22, which is adapted to:
(a) Significantly reduced energy requirements due to only pumping fresh water from installation;
(b) Longer filter and membrane service life;
(c) No pre-treatment;
(d) Water quality offshore at depth;
(e) No Brine water to dispose of; and/or
(f) Reduced environmental impact.
24. A method for desalinating sea-water as claimed in any one of claims 14 to 23, in which the modular design of the reverse osmosis means of the desalination arrangement is adapted and optimized for deep sea control and recovery systems for maintenance.
25. A method for desalinating sea-water as claimed in any one of claims 14 to 24, which is adapted to
(a) lower water temperatures;
(b) Screen filter for micro biological entities; and/or
(c) Reverse flow flushing.
26. A method for desalinating sea-water as claimed in any one of claims 14 to 25, which is adapted to reduce the energy requirements and thus costs per unit of freshwater produced.
27. A desalination arrangement A team wellness system substantially as hereinbefore described with reference to the accompany drawings.
28. A method for desalinating sea-water substantially as hereinbefore described with reference to the accompany drawings.
PCT/IB2020/055162 2020-06-01 2020-06-01 Desalination arrangement WO2021245437A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI1001363A2 (en) * 2010-04-30 2011-12-20 Luiz Antonio Alves seawater desalination system and facilities for that purpose
CN207175547U (en) * 2017-08-25 2018-04-03 上海交通大学 A kind of deep-sea suspended seawater desalination system of no breather pipe
WO2020076164A1 (en) * 2018-10-12 2020-04-16 Bluewater Technology As Modularized subsea seawater desalination system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI1001363A2 (en) * 2010-04-30 2011-12-20 Luiz Antonio Alves seawater desalination system and facilities for that purpose
CN207175547U (en) * 2017-08-25 2018-04-03 上海交通大学 A kind of deep-sea suspended seawater desalination system of no breather pipe
WO2020076164A1 (en) * 2018-10-12 2020-04-16 Bluewater Technology As Modularized subsea seawater desalination system

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