WO2017066534A1 - Hybrid cooling and desalination system - Google Patents

Hybrid cooling and desalination system Download PDF

Info

Publication number
WO2017066534A1
WO2017066534A1 PCT/US2016/056995 US2016056995W WO2017066534A1 WO 2017066534 A1 WO2017066534 A1 WO 2017066534A1 US 2016056995 W US2016056995 W US 2016056995W WO 2017066534 A1 WO2017066534 A1 WO 2017066534A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
fluid communication
cooling
water
subsystem
Prior art date
Application number
PCT/US2016/056995
Other languages
French (fr)
Inventor
Abdelhakim Mohamed A. HASSABOU
Original Assignee
Qatar Foundation For Education, Science And Community Development
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 Qatar Foundation For Education, Science And Community Development filed Critical Qatar Foundation For Education, Science And Community Development
Publication of WO2017066534A1 publication Critical patent/WO2017066534A1/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/16Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • B01D1/0011Heating features
    • B01D1/0058Use of waste energy from other processes or sources, e.g. combustion gas
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D3/00Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/007Energy recuperation; Heat pumps
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F2001/5218Crystallization
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08Seawater, e.g. for desalination
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124Water desalination
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124Water desalination
    • Y02A20/131Reverse-osmosis
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency

Definitions

  • the present invention relates to water and energy use, and particularly to a self- sustaining, closed-circuit cooling and desalination system.
  • District cooling plants can be used to reduce energy consumption, as well as carbon dioxide emissions.
  • district cooling plants typically rely on wet cooling towers for disposing excess heat to the environment. This heat disposal results in a significant loss of fresh water. As such, heat disposal can present a major problem in hot, arid countries, such as Qatar and other GCC countries, which place a high demand on air cooling and rely on costly and energy intensive desalination processes for securing fresh water supply.
  • TSE treated sewage effluent
  • fresh water e.g. potable water
  • TSE water quality is not suitable for cooling towers
  • Effective treatment of TSE can be done through membrane processes, ideally with low pressure reverse osmosis desalination technology.
  • Conventional systems for desalinating TSE can be costly.
  • the disposal of brine resulting from reverse osmosis is a major health and environmental concern.
  • the hybrid cooling and desalination system includes a first subsystem having a first circulation assembly, a second subsystem having a second circulation assembly, and a heat pump templifier in fluid communication with the first subsystem and the second subsystem.
  • the first subsystem is configured for desalinating feed water from a feedwater source to provide purified water.
  • the first subsystem includes a filtration unit for desalination of the feed water to produce a first amount of purified water and a brine solution and a zero liquid-discharge system for providing an additional amount of purified water from the brine solution released from the filtration unit.
  • the filtration unit can include a nano- filtration unit and/or a reverse osmosis unit.
  • the second subsystem can include a district cooling plant (DCP) and a cooling tower.
  • the purified water from the first subsystem can be supplied to the cooling tower in the second subsystem as make-up water.
  • the heat pump templifier can extract waste heat from water discharged from the district cooling plant (DCP) to preheat the feed water FW supplied to the filtration unit, while cooling part of the outlet hot water from the district cooling plant condenser to a lower temperature level, such as a considerably lower temperature level, than the water leaving the cooling tower.
  • the transfer of heat from the second circulation assembly to the first circulation assembly also reduces the thermal duty and evaporation loss in the cooling tower. Furthermore, the temperature of the cooling water supplied to the condenser of the district cooling plant is lowered by mixing with the cooled part of the outlet hot water from the district cooling plant condenser.
  • the hybrid cooling and desalination system can maximize energy and water use efficiency in district cooling plants by integrating desalination processes with district cooling plants.
  • the desalination processes can include Reverse Osmosis (RO) and/or thermal desalination technologies.
  • the hybrid cooling and desalination system can polish and reuse treated sewage effluent (TSE) water as well as desalinate seawater and brackish water with 100% water recovery and zero liquid discharge (ZLD).
  • TSE sewage effluent
  • ZLD zero liquid discharge
  • the hybrid cooling and desalination system can close the water and energy circuits in the district cooling plants and recycle waste heat and waste water in the system.
  • Fig. 1 is a diagram of a hybrid cooling and desalination system, according to the present invention.
  • Fig. 2 is a diagram of a zero liquid discharge system for use in a hybrid cooling and desalination system, according to the present invention.
  • the hybrid cooling and desalination system 10 includes a first subsystem 100 having a first circulation assembly 103, a second subsystem 200 having a second circulation assembly 205, and a heat pump templifier 50 in fluid communication with the first subsystem 100 and the second subsystem 200.
  • the first subsystem 100 is configured for desalinating feed water FW, such as feedwater from a feedwater source FWS to provide purified feed water PFW.
  • the first subsystem 100 can include a filtration unit 120 and a zero liquid-discharge system 121.
  • the filtration unit 120 desalinates feed water FW to produce a first amount of purified water PW and a brine solution BS.
  • the zero liquid-discharge system 121 provides an additional amount of purified water PW from the brine solution BS released from the filtration unit 120.
  • the filtration unit 120 can include a nano-filtration unit and/or a reverse osmosis unit.
  • the second subsystem 200 can include a district cooling plant (DCP) and a cooling tower 250.
  • the purified water PW from the first subsystem can be supplied to the cooling tower 250 in the second subsystem 200 as make-up water.
  • the heat pump templifier 50 can extract waste heat from water discharged from the district cooling plant (DCP) to preheat the feed water FW supplied to the filtration unit 120. It is to be noted that the blow down from the cooling tower 250 can be recycled, such as completely recycled, in the zero liquid-discharge system 121.
  • the heat pump templifier 50 is configured for transferring heat from the second circulation assembly 205 to the first circulation assembly 103 as well as lowering the temperature of water traveling to the cooling tower 250 from the district cooling plant DCP. As such, thermal duty and evaporation loss in the cooling tower 250 can be reduced.
  • the hybrid cooling and desalination system 10 can be a closed circuit system.
  • the feed water (FW) can be seawater (SW), brackish water (BW), or tertiary treated sewage effluents (TSE).
  • the hybrid cooling and desalination system 10 can treat TSE to provide water having a quality acceptable for use in cooling towers (CTs).
  • CTs cooling towers
  • Heat from the waste water produced in the district cooling plant (DCP) can be conveyed to the first subsystem 200 by the heat pump templifier 50 to preheat a first amount of TSE in the first subsystem 200 before it is treated by the filtration unit 120.
  • the filtration unit 120 desalinates the TSE by reverse osmosis, e.g., low pressure reverse osmosis, to provide a first amount of purified water PW.
  • reverse osmosis e.g., low pressure reverse osmosis
  • the resulting brine solution BS in the filtration unit 120 is further processed by the zero liquid discharge (ZLD) system 121 to provide a second amount of purified water PW and achieve 100% water recovery.
  • the zero liquid discharge system (ZLD) 121 obviates the need for reverse osmosis brine disposal.
  • the system efficiently enhances permeate flux rate of reverse osmosis through preheating reverse osmosis feed water.
  • the first circulation assembly 103 can include a feedwater pretreatment module 105 positioned in fluid communication with a feedwater source FWS, a condenser unit 110 positioned in fluid communication with the feedwater pretreatment module 105 and in fluid communication with the heat pump templifier 50, and a first heat exchanger 115 positioned in fluid communication with the condenser unit 110.
  • Pretreating the feedwater in the feedwater pretreatment module 105 can include coagulation, passing the feed water FW through an auto strainer and/or a disc filter to remove dirt and other particles suspended in the water, and/or ultrafiltration.
  • the filtration unit 120 is in communication with the feedwater pretreatment module 105 and a first heat exchanger 115. As described previously, after the feedwater FW is pretreated in the pretreatment module 105, the first portion of the pretreated feedwater PFW is preheated in the condenser unit 110 of the first circulation assembly 103 by heat conveyed by the heat pump templifier 50, and introduced to the filtration unit 120. The first portion of the pretreated feedwater PFW can be preheated to a temperature of about 38-40°C.
  • the filtration unit 120 can have a semi-permeable membrane 125 configured for filtering the pretreated feed water PFW received from the feedwater pretreatment module 105.
  • the filtration unit 120 can be a reverse osmosis unit.
  • low pressure (10- 15 bar) reverse osmosis is used to form a brine solution BS and purified water PW (e.g. potable water) in the filtration unit 120.
  • a second portion of the pretreated feedwater PFW is preheated by the heat conveyed by the heat pump templifier 50 and conveyed to the first heat exchanger 115.
  • the brine solution (BS) emitted from the filtration unit 120 can have a temperature of about 38-40°C.
  • the first heat exchanger 115 heats the brine solution BS emitted from the filtration unit 120.
  • the brine solution leaving the heat exchanger 115 can have a temperature of about 62-69°C.
  • a second heat exchanger 130 is positioned in communication with the first heat exchanger 115.
  • the second heat exchanger 130 is configured for receiving superheated steam S, such as steam from a natural gas boiler or a liquefied petroleum gas (LPG) boiler to further heat the brine solution BS heated by the first heat exchanger 115 and for discharging a condensate into a boiler B.
  • superheated steam S such as steam from a natural gas boiler or a liquefied petroleum gas (LPG) boiler to further heat the brine solution BS heated by the first heat exchanger 115 and for discharging a condensate into a boiler B.
  • LPG liquefied petroleum gas
  • the zero liquid discharge (ZLD) system 121 is positioned in fluid communication with the second heat exchanger 130.
  • the ZLD system 121 includes an evaporation module 140 for thermal desalination of the brine solution (BS) and a condensation module 150 in which water vapor from the evaporator module 140 is condensed and returned to the second subsystem 200.
  • the brine solution (BS) entering the zero liquid discharge (ZLD) system 121 can have a temperature of about 65-90°C.
  • the ZLD system 121 can further include a dryer/crystalizer 330 (Fig. 2) for dewatering and removing crystals precipitated from the brine solution (BS).
  • the condensation module 150 is positioned in communication with the feedwater pretreatment module 105.
  • the condensation module 150 includes a recooler 340 configured for receiving a third amount of the pre treated feed water PFW to dissipate heat of condensation in the condensation module 150. As such, the thermal brine concentrator or condensation module 150 of the ZLD system 121 can be efficiently cooled.
  • the first circulation assembly 103 can include a plurality of valves.
  • the pretreated feed water PFW can flow from the feedwater pretreatment module 105 to the condenser unit 110, as illustrated by a first arrow Al, to the filtration unit 120, as illustrated by a second arrow A2, and to the condensation module 150, as illustrated by a third arrow
  • a second valve 109 such as a three-way valve, can be coupled to the condenser unit 110 to regulate the flow of heated pretreated feed water PFW from the condenser unit 110 to the first heat exchanger 115, as illustrated by a fourth arrow A4, and to the filtration unit 120, as illustrated by a fifth arrow A5.
  • the second circulation assembly 205 of the second subsystem 200 includes a first evaporator unit 210 positioned in fluid communication with a district cooling plant DCP, a compressor unit 220, and a condenser unit 230.
  • the first evaporator unit 210 is configured to extract waste heat from return water RW used by the district cooling plant DCP for cooling.
  • the compressor unit 220 positioned in fluid communication with the first evaporator unit 210 and the condenser unit 230, is configured for receiving heat, such as in the form of vapor, from the first evaporator unit 210 and supplying the compressed heat to the condenser unit 230 of the second circulation assembly 205.
  • the condenser unit 230 of the second circulation assembly 205 condenses the vapor and discharges water W, which is distributed from between the first evaporator unit 210 and the cooling tower 250 at ratios that can be determined by thermodynamic analysis.
  • the second subsystem 200 can include a third valve 235, such as a two-way valve, positioned between the condenser unit 230 and the first evaporator unit 210 so as to regulate the flow of liquid throughout the second circulation system 205, such as from the condenser unit 230 to the first evaporator unit 210 and to the cooling tower 250.
  • the condenser unit 230 of the second circulation assembly 205 uses water supplied from the cooling tower 250 to condense the steam from the compressor 220.
  • the chilled water CH passing through the first evaporator unit 210 is mixed with cooled water at the outlet of the cooling tower 250, thereby reducing the inlet cooling water temperature to the condenser unit 230 from about 33°C to 34°C to about 28°C to 29°C.
  • This reduction in temperature can reduce pumping power and the pump size of the condenser unit 230 by up to 60% due to an increase in the temperature difference through the condenser unit 230, e.g., about 7°C in conventional district cooling plant technology compared to about 10°C -12°C in the present system.
  • reducing the cooling water temperature upstream of the condenser unit 230 of the second circulation assembly 205 can improve the coefficient of performance of the district cooling plant and can reduce the energy consumption of the chillers, which can represent a major part of the total energy consumption in district cooling plants.
  • a total energy reduction such as a reduction of between 25% and 30%, can be achieved in the district cooling plant (DCP) energy consumption.
  • Chilled water returning to the DCP can have a temperature of about 4°C.
  • the second circulation assembly 205 also includes a second evaporator unit 240 positioned in fluid communication with the condenser unit 230 of the second circulation assembly 205 and in fluid communication with the heat pump templifier 50.
  • the second evaporator unit 240 is configured to transfer heat from the water supplied by the condenser 230 of the second circulation assembly 205 to the heat pump templifier 50. As such, the amount of water to be cooled through the cooling tower 250, (e.g. the thermal load on the cooling tower 250) can be considerably reduced.
  • the water leaving the second evaporator unit 240 can have a temperature of about 10-12°C.
  • a blow down valve 255 is coupled to the cooling tower 250 to remove a portion of the circulating water flow in order to maintain the amount of dissolved solids and other impurities at an acceptable level.
  • the blow down B from the cooling tower 250 is channeled into the first circulation assembly to be combined with the brine solution BS before the brine solution BS enters the first heat exchanger 115.
  • a collection basin 253 is positioned beneath the cooling tower 250 to collect the cooled water.
  • the second circulation assembly 205 can include a permeate tank buffer 260 positioned in fluid communication with the filtration unit 120 and the ZLD system 150.
  • the permeate tank buffer 260 is configured for receiving product water PW from the filtration unit 120 and from the ZLD system of the first subsystem 100 and channeling the product water PW back to the cooling tower 250 as make-up water to replace all losses due to evaporation, leaks, or discharge.
  • the pretreated feed water FW is pumped into the filtration unit 120 with sufficient pressure so as to overcome natural osmotic pressure in the filtration unit 120.
  • the semi-permeable membrane 125 allows the solvent (i.e. water) to permeate and retains the solute (i.e. dissolved salts), thereby separating desalinated product water PW (e.g. potable water) and the brine solution BS.
  • the pretreated feed water PFW enters the filtering unit 120 with sufficient pressure so as to prevent product water PW from flowing back into the brine solution BS by osmosis.
  • the feedwater pretreatment module 105 can be formed from any type of material suitable to receive the feed water FW, such as seawater, brackish water, or treated sewage effluents, from a feed water source FWS, such as from sewage treatment plants or the sea.
  • the feedwater pretreatment module 105 can be configured for pretreating the feed water FW, such as by coagulation and/or ultrafiltration.
  • the filtration unit 120 can be formed from any type of material suitable to receive pretreated feed water PFW from the feedwater pretreatment module 105.
  • the first semi-permeable membrane 125 can be any type of semipermeable membrane that allows the solvent (i.e. water) to permeate and retains the solute (i.e. dissolved salts).
  • the ZLD system 121 can be formed from any type of material suitable to receive pretreated feed water PFW from the feedwater pretreatment module 105 and heated brine solution from the second heat exchanger 130, respectively.
  • the permeate tank buffer 260 can be formed from any type of material suitable to receive product water PW from the first subsystem 100.
  • the waste heat recovery heat pump templifier 50 can be any suitable type of heat pump capable of transferring heat, such as in the form of vapor, from the second evaporation unit 240 of the second circulation assembly 205 to the condenser unit 110 of the of the first circulation assembly 103.
  • the hybrid cooling and desalination system 10 can be used for recycling water in district cooling plants or other facilities where waste heat and
  • feed water FW can be drawn into the feedwater pretreatment module 105 from a feed water source FWS, such as by any type of suitable pump (not shown), where it can be pretreated to produce the pretreated feed water PFW.
  • the pretreated feed water PFW can subsequently be pumped through the first valve 107 into the condenser unit 110 of the first circulation assembly 103 as illustrated by the first arrow Al, the filtration unit 120 as illustrated by the second arrow A2, and into the ZLD condenser subsystem 150 as illustrated by the third arrow A3.
  • the pretreated feed water PFW that is pumped through the first valve 107 into the condenser unit 110 mixes with heat, in the form of vapor, discharged by the heat pump templifier 50 to increase the temperature of the pretreated feed water PFW, e.g., from between 25°C and 35°C to a temperature greater than about 65°C.
  • a first portion of the pretreated feed water PFW that is heated, e.g., to a temperature greater than 65 °C, can then be pumped to the filtration unit 120, while a second portion of the heated pretreated feed water PFW is pumped to the first heat exchanger 115 to heat the brine solution BS created by the filtration unit 120 via reverse osmosis, as discussed herein.
  • the brine solution BS can have a temperature in the range of between 38°C and 40°C upon exiting the filtration unit 120. As the brine solution BS is heated by the pretreated feed water PFW, the pretreated feedwater PFW is cooled.
  • the pretreated feed water PFW can then be further cooled down to meet the allowable threshold temperature level by mixing with feed water FW from the feed water source FWS, such as TSE from the network, and then can be discharged back into the feed water source FWS, whereas the brine solution BS having a temperature of between 62°C and 69°C can be injected into the second heat exchanger 130, i.e., brine heater, so that the brine solution BS can be heated up to the required temperature, such as between 65°C and 90°C, for the ZLD system.
  • the feed water source FWS such as TSE from the network
  • the heat transfer in the condenser unit 110 of the first circulation assembly 103 between the pretreated feed water PFW entering the condenser unit 110 and the vapor discharged by the heat pump templifier 50 can condense the vapor discharged by the heat pump templifier 50 to form condensate (water) in the condenser unit 110 that can
  • the water can be further cooled as is conventionally known.
  • the pretreated feed water PFW can be pumped through the first valve 107 into the filtration unit 120 to form product water PW and brine solution BS through reverse osmosis, as discussed above.
  • the brine solution BS can be discharged by the filtration unit 120 into the first heat exchanger 115 where, as discussed above, the temperature of the brine solution BS can be increased, such as from between 38°C and 40°C to between 62°C and 69°C.
  • the temperature of the brine solution BS can be increased further by superheated steam S in the second heat exchanger 130 to temperatures between 70°C and 90°C, for example, prior to entering the ZLD system 121.
  • the brine solution BS can undergo flash vaporization to produce a condensate, such as dry salt DS.
  • the dry salt DS can then enter the dryer/crystalizer 330 and, once crystalized, be discharged.
  • the heat H created by flash vaporization in the evaporator system 140 can be transferred to the recooler 340 in the ZLD condenser system 150 to be dissipated by the pretreated feed water PFW from the feedwater pretreatment module 105.
  • the pretreated feed water PFW can then be recirculated through the filtration unit 120.
  • Condensate from the condenser system 150 can be mixed with product water PW discharged from the filtration unit 120 and channeled into the permeate tank buffer 260, as shown in Fig. 1.
  • the product water PW then flows into the cooling tower 250 for circulation through the second subsystem 200.

Abstract

The hybrid cooling and desalination system (10) includes a first subsystem (100) having a first circulation assembly (103), a second subsystem (200) having a second circulation assembly (205), and a heat pump templifier (50) in fluid communication with first subsystem (100) and the second subsystem (200). The first subsystem (100) is configured for desalinating feed water from a feedwater source (FWS) to provide purified water (PW). The second subsystem (200) can include a district cooling plant (DCP) and a cooling tower (250). The purified water (PW) from the first subsystem (100) can be supplied to the cooling tower (250) in the second subsystem (200) as make-up water. The heat pump templifier (50) can extract waste heat from water discharged from the district cooling plant (DCP) to preheat the feed water (FW) supplied to a filtration unit (120). It is to be noted that the blow down from the cooling tower (250) can be recycled in the first subsystem (100).

Description

HYBRID COOLING AND DESALINATION SYSTEM
TECHNICAL FIELD
The present invention relates to water and energy use, and particularly to a self- sustaining, closed-circuit cooling and desalination system. BACKGROUND ART
District cooling plants can be used to reduce energy consumption, as well as carbon dioxide emissions. However, district cooling plants typically rely on wet cooling towers for disposing excess heat to the environment. This heat disposal results in a significant loss of fresh water. As such, heat disposal can present a major problem in hot, arid countries, such as Qatar and other GCC countries, which place a high demand on air cooling and rely on costly and energy intensive desalination processes for securing fresh water supply.
One proposed solution is the use of treated sewage effluent (TSE) for wet cooling towers, instead of fresh water (e.g. potable water). As TSE water quality is not suitable for cooling towers, TSE requires treatment prior to its use in district cooling towers. Effective treatment of TSE can be done through membrane processes, ideally with low pressure reverse osmosis desalination technology. Conventional systems for desalinating TSE, however, can be costly. In addition, the disposal of brine resulting from reverse osmosis is a major health and environmental concern.
Thus, a hybrid cooling and desalination system solving the aforementioned problems is desired.
DISCLOSURE OF INVENTION
The hybrid cooling and desalination system includes a first subsystem having a first circulation assembly, a second subsystem having a second circulation assembly, and a heat pump templifier in fluid communication with the first subsystem and the second subsystem. The first subsystem is configured for desalinating feed water from a feedwater source to provide purified water. The first subsystem includes a filtration unit for desalination of the feed water to produce a first amount of purified water and a brine solution and a zero liquid-discharge system for providing an additional amount of purified water from the brine solution released from the filtration unit. The filtration unit can include a nano- filtration unit and/or a reverse osmosis unit. The second subsystem can include a district cooling plant (DCP) and a cooling tower. The purified water from the first subsystem can be supplied to the cooling tower in the second subsystem as make-up water. The heat pump templifier can extract waste heat from water discharged from the district cooling plant (DCP) to preheat the feed water FW supplied to the filtration unit, while cooling part of the outlet hot water from the district cooling plant condenser to a lower temperature level, such as a considerably lower temperature level, than the water leaving the cooling tower. The transfer of heat from the second circulation assembly to the first circulation assembly also reduces the thermal duty and evaporation loss in the cooling tower. Furthermore, the temperature of the cooling water supplied to the condenser of the district cooling plant is lowered by mixing with the cooled part of the outlet hot water from the district cooling plant condenser.
The hybrid cooling and desalination system can maximize energy and water use efficiency in district cooling plants by integrating desalination processes with district cooling plants. The desalination processes can include Reverse Osmosis (RO) and/or thermal desalination technologies. The hybrid cooling and desalination system can polish and reuse treated sewage effluent (TSE) water as well as desalinate seawater and brackish water with 100% water recovery and zero liquid discharge (ZLD). The hybrid cooling and desalination system can close the water and energy circuits in the district cooling plants and recycle waste heat and waste water in the system.
These and other features of the present invention will become readily apparent upon further review of the following specification and drawings.
BRIEF DESCRIPTION OF DRAWINGS
Fig. 1 is a diagram of a hybrid cooling and desalination system, according to the present invention.
Fig. 2 is a diagram of a zero liquid discharge system for use in a hybrid cooling and desalination system, according to the present invention.
Unless otherwise indicated, similar reference characters denote corresponding features consistently throughout the attached drawings. BEST MODES FOR CARRYING OUT THE INVENTION
Referring to Figs. 1 and 2, a hybrid cooling and desalination system 10 is generally illustrated. The hybrid cooling and desalination system 10 includes a first subsystem 100 having a first circulation assembly 103, a second subsystem 200 having a second circulation assembly 205, and a heat pump templifier 50 in fluid communication with the first subsystem 100 and the second subsystem 200. The first subsystem 100 is configured for desalinating feed water FW, such as feedwater from a feedwater source FWS to provide purified feed water PFW. The first subsystem 100 can include a filtration unit 120 and a zero liquid-discharge system 121. The filtration unit 120 desalinates feed water FW to produce a first amount of purified water PW and a brine solution BS. The zero liquid-discharge system 121 provides an additional amount of purified water PW from the brine solution BS released from the filtration unit 120. The filtration unit 120 can include a nano-filtration unit and/or a reverse osmosis unit. The second subsystem 200 can include a district cooling plant (DCP) and a cooling tower 250. The purified water PW from the first subsystem can be supplied to the cooling tower 250 in the second subsystem 200 as make-up water. The heat pump templifier 50 can extract waste heat from water discharged from the district cooling plant (DCP) to preheat the feed water FW supplied to the filtration unit 120. It is to be noted that the blow down from the cooling tower 250 can be recycled, such as completely recycled, in the zero liquid-discharge system 121.
As described in detail below, the heat pump templifier 50 is configured for transferring heat from the second circulation assembly 205 to the first circulation assembly 103 as well as lowering the temperature of water traveling to the cooling tower 250 from the district cooling plant DCP. As such, thermal duty and evaporation loss in the cooling tower 250 can be reduced. It is to be noted that the hybrid cooling and desalination system 10 can be a closed circuit system.
The feed water (FW) can be seawater (SW), brackish water (BW), or tertiary treated sewage effluents (TSE). For example, the hybrid cooling and desalination system 10 can treat TSE to provide water having a quality acceptable for use in cooling towers (CTs). Heat from the waste water produced in the district cooling plant (DCP) can be conveyed to the first subsystem 200 by the heat pump templifier 50 to preheat a first amount of TSE in the first subsystem 200 before it is treated by the filtration unit 120. For example, the filtration unit 120 desalinates the TSE by reverse osmosis, e.g., low pressure reverse osmosis, to provide a first amount of purified water PW. The resulting brine solution BS in the filtration unit 120 is further processed by the zero liquid discharge (ZLD) system 121 to provide a second amount of purified water PW and achieve 100% water recovery. The zero liquid discharge system (ZLD) 121 obviates the need for reverse osmosis brine disposal. The system efficiently enhances permeate flux rate of reverse osmosis through preheating reverse osmosis feed water.
The first circulation assembly 103 can include a feedwater pretreatment module 105 positioned in fluid communication with a feedwater source FWS, a condenser unit 110 positioned in fluid communication with the feedwater pretreatment module 105 and in fluid communication with the heat pump templifier 50, and a first heat exchanger 115 positioned in fluid communication with the condenser unit 110. Pretreating the feedwater in the feedwater pretreatment module 105 can include coagulation, passing the feed water FW through an auto strainer and/or a disc filter to remove dirt and other particles suspended in the water, and/or ultrafiltration.
The filtration unit 120 is in communication with the feedwater pretreatment module 105 and a first heat exchanger 115. As described previously, after the feedwater FW is pretreated in the pretreatment module 105, the first portion of the pretreated feedwater PFW is preheated in the condenser unit 110 of the first circulation assembly 103 by heat conveyed by the heat pump templifier 50, and introduced to the filtration unit 120. The first portion of the pretreated feedwater PFW can be preheated to a temperature of about 38-40°C. The filtration unit 120 can have a semi-permeable membrane 125 configured for filtering the pretreated feed water PFW received from the feedwater pretreatment module 105. For example, the filtration unit 120 can be a reverse osmosis unit. Preferably, low pressure (10- 15 bar) reverse osmosis is used to form a brine solution BS and purified water PW (e.g. potable water) in the filtration unit 120. A second portion of the pretreated feedwater PFW is preheated by the heat conveyed by the heat pump templifier 50 and conveyed to the first heat exchanger 115. The brine solution (BS) emitted from the filtration unit 120 can have a temperature of about 38-40°C. The first heat exchanger 115 heats the brine solution BS emitted from the filtration unit 120. The brine solution leaving the heat exchanger 115 can have a temperature of about 62-69°C. A second heat exchanger 130 is positioned in communication with the first heat exchanger 115. The second heat exchanger 130 is configured for receiving superheated steam S, such as steam from a natural gas boiler or a liquefied petroleum gas (LPG) boiler to further heat the brine solution BS heated by the first heat exchanger 115 and for discharging a condensate into a boiler B. It is to be noted that the filtration unit 120 can be positioned in fluid communication with a feedwater holding tank 310 (Fig. 2) instead of a pretreatment module 105
The zero liquid discharge (ZLD) system 121 is positioned in fluid communication with the second heat exchanger 130. The ZLD system 121 includes an evaporation module 140 for thermal desalination of the brine solution (BS) and a condensation module 150 in which water vapor from the evaporator module 140 is condensed and returned to the second subsystem 200. The brine solution (BS) entering the zero liquid discharge (ZLD) system 121 can have a temperature of about 65-90°C. The ZLD system 121 can further include a dryer/crystalizer 330 (Fig. 2) for dewatering and removing crystals precipitated from the brine solution (BS). The condensation module 150 is positioned in communication with the feedwater pretreatment module 105. The condensation module 150 includes a recooler 340 configured for receiving a third amount of the pre treated feed water PFW to dissipate heat of condensation in the condensation module 150. As such, the thermal brine concentrator or condensation module 150 of the ZLD system 121 can be efficiently cooled.
The first circulation assembly 103 can include a plurality of valves. A first valve
107, such as a three-way valve, can be coupled to the feedwater pretreatment module 105 to regulate the flow of pretreated feed water PFW throughout the first circulation assembly 103. The pretreated feed water PFW can flow from the feedwater pretreatment module 105 to the condenser unit 110, as illustrated by a first arrow Al, to the filtration unit 120, as illustrated by a second arrow A2, and to the condensation module 150, as illustrated by a third arrow
A3. A second valve 109, such as a three-way valve, can be coupled to the condenser unit 110 to regulate the flow of heated pretreated feed water PFW from the condenser unit 110 to the first heat exchanger 115, as illustrated by a fourth arrow A4, and to the filtration unit 120, as illustrated by a fifth arrow A5.
The second circulation assembly 205 of the second subsystem 200 includes a first evaporator unit 210 positioned in fluid communication with a district cooling plant DCP, a compressor unit 220, and a condenser unit 230. The first evaporator unit 210 is configured to extract waste heat from return water RW used by the district cooling plant DCP for cooling. The compressor unit 220, positioned in fluid communication with the first evaporator unit 210 and the condenser unit 230, is configured for receiving heat, such as in the form of vapor, from the first evaporator unit 210 and supplying the compressed heat to the condenser unit 230 of the second circulation assembly 205. The condenser unit 230 of the second circulation assembly 205 condenses the vapor and discharges water W, which is distributed from between the first evaporator unit 210 and the cooling tower 250 at ratios that can be determined by thermodynamic analysis. It is to be noted that the second subsystem 200 can include a third valve 235, such as a two-way valve, positioned between the condenser unit 230 and the first evaporator unit 210 so as to regulate the flow of liquid throughout the second circulation system 205, such as from the condenser unit 230 to the first evaporator unit 210 and to the cooling tower 250. The condenser unit 230 of the second circulation assembly 205 uses water supplied from the cooling tower 250 to condense the steam from the compressor 220.
The chilled water CH passing through the first evaporator unit 210 is mixed with cooled water at the outlet of the cooling tower 250, thereby reducing the inlet cooling water temperature to the condenser unit 230 from about 33°C to 34°C to about 28°C to 29°C. This reduction in temperature can reduce pumping power and the pump size of the condenser unit 230 by up to 60% due to an increase in the temperature difference through the condenser unit 230, e.g., about 7°C in conventional district cooling plant technology compared to about 10°C -12°C in the present system. Further, reducing the cooling water temperature upstream of the condenser unit 230 of the second circulation assembly 205 can improve the coefficient of performance of the district cooling plant and can reduce the energy consumption of the chillers, which can represent a major part of the total energy consumption in district cooling plants. As such, a total energy reduction, such as a reduction of between 25% and 30%, can be achieved in the district cooling plant (DCP) energy consumption. Chilled water returning to the DCP can have a temperature of about 4°C.
The second circulation assembly 205 also includes a second evaporator unit 240 positioned in fluid communication with the condenser unit 230 of the second circulation assembly 205 and in fluid communication with the heat pump templifier 50. The second evaporator unit 240 is configured to transfer heat from the water supplied by the condenser 230 of the second circulation assembly 205 to the heat pump templifier 50. As such, the amount of water to be cooled through the cooling tower 250, (e.g. the thermal load on the cooling tower 250) can be considerably reduced. The water leaving the second evaporator unit 240 can have a temperature of about 10-12°C. A blow down valve 255 is coupled to the cooling tower 250 to remove a portion of the circulating water flow in order to maintain the amount of dissolved solids and other impurities at an acceptable level. The blow down B from the cooling tower 250 is channeled into the first circulation assembly to be combined with the brine solution BS before the brine solution BS enters the first heat exchanger 115. A collection basin 253 is positioned beneath the cooling tower 250 to collect the cooled water. The second circulation assembly 205 can include a permeate tank buffer 260 positioned in fluid communication with the filtration unit 120 and the ZLD system 150. The permeate tank buffer 260 is configured for receiving product water PW from the filtration unit 120 and from the ZLD system of the first subsystem 100 and channeling the product water PW back to the cooling tower 250 as make-up water to replace all losses due to evaporation, leaks, or discharge.
It is to be noted that for reverse osmosis, the pretreated feed water FW is pumped into the filtration unit 120 with sufficient pressure so as to overcome natural osmotic pressure in the filtration unit 120. For example, when the pretreated feed water PFW enters the filtration unit 120 from the feedwater pretreatment module 105, the semi-permeable membrane 125 allows the solvent (i.e. water) to permeate and retains the solute (i.e. dissolved salts), thereby separating desalinated product water PW (e.g. potable water) and the brine solution BS. Additionally, the pretreated feed water PFW enters the filtering unit 120 with sufficient pressure so as to prevent product water PW from flowing back into the brine solution BS by osmosis.
The feedwater pretreatment module 105 can be formed from any type of material suitable to receive the feed water FW, such as seawater, brackish water, or treated sewage effluents, from a feed water source FWS, such as from sewage treatment plants or the sea. The feedwater pretreatment module 105 can be configured for pretreating the feed water FW, such as by coagulation and/or ultrafiltration. The filtration unit 120 can be formed from any type of material suitable to receive pretreated feed water PFW from the feedwater pretreatment module 105. The first semi-permeable membrane 125 can be any type of semipermeable membrane that allows the solvent (i.e. water) to permeate and retains the solute (i.e. dissolved salts).
The ZLD system 121 can be formed from any type of material suitable to receive pretreated feed water PFW from the feedwater pretreatment module 105 and heated brine solution from the second heat exchanger 130, respectively. Further, the permeate tank buffer 260 can be formed from any type of material suitable to receive product water PW from the first subsystem 100.
The waste heat recovery heat pump templifier 50 can be any suitable type of heat pump capable of transferring heat, such as in the form of vapor, from the second evaporation unit 240 of the second circulation assembly 205 to the condenser unit 110 of the of the first circulation assembly 103. The hybrid cooling and desalination system 10 can be used for recycling water in district cooling plants or other facilities where waste heat and
contaminated water is available.
By way of operation, feed water FW can be drawn into the feedwater pretreatment module 105 from a feed water source FWS, such as by any type of suitable pump (not shown), where it can be pretreated to produce the pretreated feed water PFW. The pretreated feed water PFW can subsequently be pumped through the first valve 107 into the condenser unit 110 of the first circulation assembly 103 as illustrated by the first arrow Al, the filtration unit 120 as illustrated by the second arrow A2, and into the ZLD condenser subsystem 150 as illustrated by the third arrow A3.
The pretreated feed water PFW that is pumped through the first valve 107 into the condenser unit 110 mixes with heat, in the form of vapor, discharged by the heat pump templifier 50 to increase the temperature of the pretreated feed water PFW, e.g., from between 25°C and 35°C to a temperature greater than about 65°C. A first portion of the pretreated feed water PFW that is heated, e.g., to a temperature greater than 65 °C, can then be pumped to the filtration unit 120, while a second portion of the heated pretreated feed water PFW is pumped to the first heat exchanger 115 to heat the brine solution BS created by the filtration unit 120 via reverse osmosis, as discussed herein. It is to be noted that the brine solution BS can have a temperature in the range of between 38°C and 40°C upon exiting the filtration unit 120. As the brine solution BS is heated by the pretreated feed water PFW, the pretreated feedwater PFW is cooled. For example, after heating the brine solution BS in the first heat exchanger 115 to a temperature of between 62°C and 69°C, the pretreated feed water PFW can then be further cooled down to meet the allowable threshold temperature level by mixing with feed water FW from the feed water source FWS, such as TSE from the network, and then can be discharged back into the feed water source FWS, whereas the brine solution BS having a temperature of between 62°C and 69°C can be injected into the second heat exchanger 130, i.e., brine heater, so that the brine solution BS can be heated up to the required temperature, such as between 65°C and 90°C, for the ZLD system.
The heat transfer in the condenser unit 110 of the first circulation assembly 103 between the pretreated feed water PFW entering the condenser unit 110 and the vapor discharged by the heat pump templifier 50 can condense the vapor discharged by the heat pump templifier 50 to form condensate (water) in the condenser unit 110 that can
subsequently be pumped through a fourth valve 112 through the second evaporation unit 240 to the cooling tower 250. Once in the cooling tower 250, the water can be further cooled as is conventionally known. The pretreated feed water PFW can be pumped through the first valve 107 into the filtration unit 120 to form product water PW and brine solution BS through reverse osmosis, as discussed above. Once formed, the brine solution BS can be discharged by the filtration unit 120 into the first heat exchanger 115 where, as discussed above, the temperature of the brine solution BS can be increased, such as from between 38°C and 40°C to between 62°C and 69°C.
Referring to Fig. 2, after the brine solution BS is discharged from the first heat exchanger 115, the temperature of the brine solution BS can be increased further by superheated steam S in the second heat exchanger 130 to temperatures between 70°C and 90°C, for example, prior to entering the ZLD system 121. Once inside the ZLD system 121, the brine solution BS can undergo flash vaporization to produce a condensate, such as dry salt DS. The dry salt DS can then enter the dryer/crystalizer 330 and, once crystalized, be discharged. The heat H created by flash vaporization in the evaporator system 140 can be transferred to the recooler 340 in the ZLD condenser system 150 to be dissipated by the pretreated feed water PFW from the feedwater pretreatment module 105. The pretreated feed water PFW can then be recirculated through the filtration unit 120. Condensate from the condenser system 150 can be mixed with product water PW discharged from the filtration unit 120 and channeled into the permeate tank buffer 260, as shown in Fig. 1. The product water PW then flows into the cooling tower 250 for circulation through the second subsystem 200.
It is to be understood that the present invention is not limited to the embodiments described above, but encompasses any and all embodiments within the scope of the following claims.

Claims

CLAIMS I claim:
1. A hybrid cooling and desalination system, comprising:
a first subsystem including a first circulation assembly, the first circulation assembly including
a feedwater pretreatment module positioned in fluid communication with a feedwater source;
a first condenser unit positioned in fluid communication with the feedwater pretreatment module; and
a first heat exchanger positioned in fluid communication with the first condenser unit;
a second subsystem including a second circulation assembly, the second circulation assembly including
a first evaporator unit positioned in fluid communication with a district cooling plant, the first evaporator unit configured for extracting waste heat from return water used by the district cooling plant for cooling;
a compressor unit positioned in fluid communication with the first evaporator unit, the compressor unit configured for receiving heat from the first evaporator unit; a second condenser unit positioned in fluid communication with the compressor unit and in fluid communication with the first evaporator unit, the compressor unit configured for providing compressed heat to the condenser unit; and a second evaporator unit positioned in fluid communication with the condenser unit; and
a heat pump templifier positioned in communication with the condenser unit of the first subsystem and the second evaporator unit of the second subsystem, the heat pump templifier being configured for transferring heat from the second circulation assembly of the second subsystem to the first circulation assembly of the first subsystem.
2. The hybrid cooling and desalination system according to claim 1, further comprising a filtration unit positioned in fluid communication with the feedwater pretreatment module and in fluid communication with the first heat exchanger, the filtration unit configured for producing product water and brine solution.
3. The hybrid cooling and desalination system according to claim 2, wherein the filtration unit comprises a semi-permeable membrane configured for filtering the pretreated feed water received from the feedwater pretreatment module.
4. The hybrid cooling and desalination system according to claim 2, further comprising a second heat exchanger positioned in fluid communication with the first heat exchanger.
5. The hybrid cooling and desalination system according to claim 4, further comprises a zero liquid discharge system positioned in fluid communication with the second heat exchanger and with the feedwater pretreatment module.
6. The hybrid cooling and desalination system according to claim 1, further comprising a cooling tower positioned in fluid communication with the second evaporator unit.
7. The hybrid cooling and desalination system according to claim 6, further comprising a blow down valve coupled to the cooling tower.
8. The hybrid cooling and desalination system according to claim 1, wherein the zero liquid discharge system further comprises a dryer/crystalizer configured for dewatering and removing crystals precipitated from brine solution.
9. The hybrid cooling and desalination system according to claim 1, wherein the feed water is selected from the group consisting of seawater, brackish water, tertiary treated sewage effluents, and a combination thereof.
10. A method for cooling and desalinating feed water, comprising:
mixing feed water with heat in a first condenser unit;
separating the heated water from the first condenser unit into a first water portion and a second water portion;
directing the first water portion to a filtration unit to separate brine solution therefrom; directing the second water portion to a first heat exchanger to heat the brine solution; directing the heated brine solution to a second heat exchanger for further heating; receiving condensate from the first condenser unit in an evaporation unit; and receiving and cooling water from the evaporation unit in a cooling tower.
11. A hybrid cooling and desalination system, comprising:
a first subsystem including a first circulation assembly, the first circulation assembly including
a feedwater pretreatment module positioned in fluid communication with a feedwater source;
a condenser unit positioned in fluid communication with the feedwater pretreatment module;
a first heat exchanger positioned in fluid communication with the condenser unit; and
a filtration unit positioned in fluid communication with the feedwater pretreatment module and in fluid communication with the first heat exchanger, the filtration unit configured for producing product water and a brine solution;
a second subsystem including a second circulation assembly, the second circulation assembly including
a first evaporator unit positioned in fluid communication with a district cooling plant, the first evaporator unit configured for extracting waste heat from return water used by the district cooling plant for cooling;
a compressor unit positioned in fluid communication with the first evaporator unit, the compressor unit configured for receiving heat from the first evaporator unit; a condenser unit positioned in fluid communication with the compressor unit, the compressor unit configured for providing compressed heat to the condenser unit; a second evaporator unit positioned in fluid communication with the condenser unit;
a cooling tower positioned in fluid communication with the second evaporator unit; and
a blow down valve coupled to the cooling tower; and
a heat pump templifier positioned in communication with the condenser unit of the first subsystem and the second evaporator unit of the second subsystem, the heat pump templifier being configured for transferring heat from the second circulation assembly of the second subsystem to the first circulation assembly of the first subsystem.
12. The hybrid cooling and desalination system according to claim 11, wherein the filtration unit comprises a semi-permeable membrane configured for filtering the pretreated feed water received from the feedwater pretreatment module.
13. The hybrid cooling and desalination system according to claim 11, further comprising a second heat exchanger positioned in fluid communication with the first heat exchanger.
14. The hybrid cooling and desalination system according to claim 13, further comprising a zero liquid discharge system positioned in fluid communication with the second heat exchanger and with the feedwater pretreatment module.
15. The hybrid cooling and desalination system according to claim 14, wherein the zero liquid discharge system comprises an evaporation module positioned in fluid communication with a condensation module, wherein the evaporation module is positioned in fluid communication with the second heat exchanger and the condensation module is positioned in fluid communication with the feedwater pretreatment module.
16. The hybrid cooling and desalination system according to claim 14, wherein the second circulation assembly further comprises a permeate tank buffer positioned in fluid communication with the filtration unit and the zero liquid discharge system, the permeate tank buffer configured for receiving product water from the filtration unit and from the zero liquid discharge system and for channeling the product water to the cooling tower as make-up water.
17. The hybrid cooling and desalination system according to claim 15, wherein the condensation module comprises a recooler configured for dissipating heat of condensation in the condensation module.
18. The hybrid cooling and desalination system according to claim 15, wherein the zero liquid discharge system further comprises a dryer/crystalizer configured for dewatering and removing crystals precipitated from brine solution.
19. The hybrid cooling and desalination system according to claim 11, wherein the feed water is selected from the group consisting of seawater, brackish water, tertiary treated sewage effluents, and a combination thereof.
PCT/US2016/056995 2015-10-14 2016-10-14 Hybrid cooling and desalination system WO2017066534A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201562241724P 2015-10-14 2015-10-14
US62/241,724 2015-10-14

Publications (1)

Publication Number Publication Date
WO2017066534A1 true WO2017066534A1 (en) 2017-04-20

Family

ID=58517998

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2016/056995 WO2017066534A1 (en) 2015-10-14 2016-10-14 Hybrid cooling and desalination system

Country Status (1)

Country Link
WO (1) WO2017066534A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108870522A (en) * 2018-07-11 2018-11-23 集美大学 Solar heat pump family formula central hot-water system
WO2019066687A1 (en) 2017-09-29 2019-04-04 King Abdulaziz City For Science And Technology Combined desalinated water production system
WO2019083416A1 (en) 2017-10-23 2019-05-02 King Abdulaziz City For Science And Technology Water desalination system
US11097203B1 (en) 2020-03-10 2021-08-24 Bechtel Hydrocarbon Technology Solutions, Inc. Low energy ejector desalination system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020088703A1 (en) * 2001-01-11 2002-07-11 Walker Thomas Jeffrey Method and evaporator system for treating wastewater effluents
US7731854B1 (en) * 2007-02-15 2010-06-08 H2O Tech, Inc. Situ system and method for treating an oil and gas well drilling fluid
US8147697B2 (en) * 2011-07-03 2012-04-03 King Abdulaziz City for Science and Technology (KACST) Apparatus and process for desalination of brackish water
US20120247149A1 (en) * 2009-10-20 2012-10-04 Eh2 (9170-3173) Quebec Inc Process cooling system and method using seawater
US20130264185A1 (en) * 2012-04-04 2013-10-10 Alfredo B. Brillantes, JR. Method and Means of Production Water Desalination

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020088703A1 (en) * 2001-01-11 2002-07-11 Walker Thomas Jeffrey Method and evaporator system for treating wastewater effluents
US7731854B1 (en) * 2007-02-15 2010-06-08 H2O Tech, Inc. Situ system and method for treating an oil and gas well drilling fluid
US20120247149A1 (en) * 2009-10-20 2012-10-04 Eh2 (9170-3173) Quebec Inc Process cooling system and method using seawater
US8147697B2 (en) * 2011-07-03 2012-04-03 King Abdulaziz City for Science and Technology (KACST) Apparatus and process for desalination of brackish water
US20130264185A1 (en) * 2012-04-04 2013-10-10 Alfredo B. Brillantes, JR. Method and Means of Production Water Desalination

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019066687A1 (en) 2017-09-29 2019-04-04 King Abdulaziz City For Science And Technology Combined desalinated water production system
WO2019083416A1 (en) 2017-10-23 2019-05-02 King Abdulaziz City For Science And Technology Water desalination system
CN108870522A (en) * 2018-07-11 2018-11-23 集美大学 Solar heat pump family formula central hot-water system
US11097203B1 (en) 2020-03-10 2021-08-24 Bechtel Hydrocarbon Technology Solutions, Inc. Low energy ejector desalination system

Similar Documents

Publication Publication Date Title
Nassrullah et al. Energy for desalination: A state-of-the-art review
CN101139119B (en) Machine for desalination of sea water by using pressure gas flash evaporation method
US20110180479A1 (en) Zero liquid discharge water treatment system and method
WO2012120912A1 (en) System for producing fresh water
WO2013121547A1 (en) Seawater desalination system
EP2699519A1 (en) Methods and systems for treating water streams comprising ammonium
KR101184787B1 (en) Membrane filtration using heatpump
WO2017066534A1 (en) Hybrid cooling and desalination system
Al-Mutaz Water desalination in the Arabian Gulf region
US20180272246A1 (en) Production Water Desalinization Via a Reciprocal Heat Transfer and Recovery
US20170369337A1 (en) Enhanced brine concentration with osmotically driven membrane systems and processes
US20130264185A1 (en) Method and Means of Production Water Desalination
WO2018045708A1 (en) Indirect air-cooling unit heat recovery and water treatment device and method
KR101695779B1 (en) Intelligent vacuum membrane distillation module and freshwater apparatus of seawater comprising the same
US11465924B2 (en) Hybrid process and system for recovering water
Seigworth et al. Case study: integrating membrane processes with evaporation to achieve economical zero liquid discharge at the Doswell combined cycle facility
KR101344784B1 (en) Seawater desalination method and apparatus combining forward osmosis, precipitation and reverse osmosis
CN111386147A (en) Membrane type water treatment system and method thereof
KR101672852B1 (en) Desalination system by using dual source energy
JP2009162514A (en) System for purifying system water in secondary system of nuclear power plant with pressurized water reactor
WO2018022349A1 (en) Hybrid desalination system
CN103420533A (en) Treatment method for high-concentration organic wastewater
KR20160006914A (en) Hybrid desalination system and method
CA3116414C (en) Method and system for treating saltwater containing volatile compounds
CN107954561A (en) Overcritical collaboration counter-infiltration system and its method for realizing sea water desalination zero-emission

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16856251

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16856251

Country of ref document: EP

Kind code of ref document: A1