108 results about "Water desalination" patented technology

The invention belongs to the technical field of water desalination, and particularly relates to a bionic aloe evaporation and capture integrated all-weather water collecting device and a manufacturing method. The water collecting device comprises a base and a plurality of bionic units arranged on the base, and the bionic units are bionic aloe trees; the base is circular, the bionic units are circumferentially distributed around the circle center of the base, and at least two layers of bionic units are arranged; and the water collecting device is prepared from a hydrogel material. The base part of the device can utilize the photo-thermal characteristic of hydrogel in the daytime, and seawater evaporation can be carried out through sunlight; at night, mist catching can be carried out through the tip effect of the aloe form of the bionic unit, and water vapor in the air is collected. The whole device can play a role in the whole day and is not limited by the difference between the day and the night, and the fresh water collection efficiency is greatly improved.

This disclosure relates to the fabrication of high-performance thin film composite (TFC) reverse osmosis (RO) membranes comprising a thin polyamide rejection layer (thickness of 100-200 nanometer), a porous substrate including polysulfone (PSf) layer (thickness of 40-50 micron) cast on polyester nonwoven fabric (thickness of ˜100 micron). Hydrophilic and antibacterial TFC polyamide RO membranes were developed by incorporating green Lignin and nanostructured silver-based metal organic frameworks (MOFs) into the selective layer. The polyamide layer of TFC RO membranes was fabricated on the porous PSf substrate by interfacial polymerization between aqueous monomer solutions containing MPD, and adequate additives in water and organic monomer solutions containing TMC in the mixture of hexane and co-solvents. The optimized produced RO membranes were provided water flux of 95-100 LMH and sodium chloride (NaCl) salt rejection of 98.5-99.0% during filtration of 2000 ppm NaCl solution at 225 psi pressure, and water flux of 55-60 LMH and sodium chloride (NaCl) salt rejection of 98.6-98.9% during filtration of 35000 ppm NaCl solution at 800 psi pressure. This disclosure also relates to developing a roll-to-roll PSf membrane as a substrate for making TFC RO membranes for water desalination

The invention provides a saline-alkaline water salt redistribution method based on artificial regulation and control of salinity gradient vertical layering, and belongs to the technical field of saline-alkaline water utilization. The method comprises the following steps: extracting surface saline-alkali water or underground saline-alkali water; desalting the extracted saline-alkaline water by using a primary reverse osmosis system to obtain fresh water and concentrated saline-alkaline water; and recharging the concentrated saline-alkaline water to the bottom layer of the saline-alkaline water. According to the method, saline-alkali water resources are sustainably regenerated into fresh water resources by utilizing a saline-alkali water desalination technology and a bottom layer recharge technology of concentrated saline-alkali water, and under the condition that the total salt content of the saline-alkali water is not integrally changed, the salt content of the saline-alkali water is subjected to vertical spatial level redistribution by manually regulating and controlling the salinity gradient vertical layering, so that the salt content of the saline-alkali water is reduced, and the salt content of the saline-alkali water is reduced. The method has the dual functions of saline-alkali water resource development and utilization and salt ecological regulation and control, the purpose of saline-alkali land treatment or saline-alkali water comprehensive utilization can be achieved without depending on external fresh water, and the method has important popularization value in saline-alkali areas.

Disclosed herein are methods for producing electrodes comprising single-layer 1T′-transition metal dichalcogenide (TMD) nanosheets. The method includes filtering a suspension of single-layer 1T′-TMD nanosheets over a polymeric substrate to produce the electrode, wherein, the single-layer 1T′-TMD nanosheets of the electrode are no more than 1,000 nm in thickness; the electrode comprises at least 70% 1T′-phase; and the electrode has a calculated electrochemical active surface area (ECSA) that is about 10-fold higher than that of a control electrode, which comprises 2H-TMD nanosheets. Also disclosed herein are methods for deionizing a fluid. The method includes steps of discharging the fluid in an electrochemical capacitor at a constant voltage of no more than 0.5 V to deionize the fluid, wherein the electrochemical capacitor is characterized in having the electrode comprising single-layer 1T′-TMD nanosheets produced by the present method.

The utility model provides a vacuum concealed pipe circulating water salt elimination system which comprises a plurality of concealed pipes which are respectively connected with a water conveying pipe through a water collecting pipe; the concealed pipe comprises a pipe body, and a plurality of water collecting holes are formed in the pipe body; each water collecting pipe is provided with a vacuum negative-pressure drainage device, the water conveying pipe is connected with a salt washing water treatment device, and the water conveying pipe is provided with a water suction pump; a water outlet pipe is further connected to the salt washing water treatment device, and the water outlet pipe is connected with an irrigation leaching water distribution device used for leaching soil; the washing brine treatment device comprises an electrodialysis treatment unit, the front end of the electrodialysis treatment unit is connected with a reservoir, the rear end is connected with a fresh water tank, and a flowmeter is arranged on a pipeline for connecting the electrodialysis treatment unit and the reservoir; the fresh water pool is connected with the water outlet pipe, the reservoir is connected with the water pipe, the fresh water pool is further provided with an overflow pipe, and a drainage port end of the overflow pipe extends to the drainage ditch. According to the invention, the salt elimination efficiency is greatly improved, the investment cost of concealed pipe laying is reduced, the water is saved, and water pollution is prevented.

An electrocoagulation (EC) reactor and method for simultaneous CO2 capture and brine desalination. The EC reactor includes a reaction chamber that holds brine solution with contaminants, an inlet tube for CO2 gas mixture supply, and a plurality of electrodes (130), submerged in the brine. The electrodes are connected to a power source, applying a voltage to induce electrochemical reactions that precipitate dissolved salts and heavy metals, reducing brine salinity and contaminants, while capturing CO2 in the form of carbonates to form solid coagulants. The method involves introducing brine into the EC reactor's reaction chamber, adding calcium oxide (CaO) and ammonium bicarbonate (NH4HCO3) to create a homogeneous solution, and applying electric current to dissolve the electrodes, producing solid coagulants. A CO2 gas mixture is introduced to facilitate carbonation reactions, forming precipitates like calcium carbonate (CaCO3) and magnesium carbonate (MgCO3), which are filtered to obtain desalinated brine.

There is provided a method for controlling at least one capacitive deionization (CDI) cell used for water desalination. The method comprises subsequent to feeding the at least one CDI cell with water at an initial flow rate, obtaining a measurement of an actual output concentration of water exiting the at least one CDI cell, comparing the actual output concentration to a concentration setpoint, determining, based on the comparing, a change to be applied to the initial flow rate for adjusting the output concentration towards the concentration setpoint, and outputting at least one control signal comprising instructions to cause the change to be applied to the initial flow rate to obtain a modified flow rate and to cause the at least one CDI cell to be fed with water at the modified flow rate.

The present application pertains to systems and methods for desalination. In one embodiment the system employs a first storage reservoir configured to be near the surface of a body of water and configured to store a low density fluid. A second storage reservoir is configured to be located below the surface of the body of water. A desalination system is operably connected to the second reservoir. Desalinated water is produced by allowing desalination permeate to displace low density fluid in the second reservoir and transfer the low density fluid from the second reservoir to the first reservoir. Desalinated water is exported by transferring low density fluid from the first reservoir into the second reservoir to displace desalinated water from the second reservoir into a water export pipeline.

The application belongs to the technical field of polyamide composite membranes, and particularly relates to a modification method of a water treatment polyamide composite membrane. The method modifies the polyamide composite membrane by using active oxygen species generated by the reaction of complex metal ions and a peroxide aqueous solution, thereby improving the modification effect of the modification solution on the polyamide membrane. The method can improve the hydrophilicity of the membrane surface, regulate the pore size and structure of the polyamide separation layer of the membrane, break the mutual restriction of the water flux and desalination rate of the polyamide membrane, and simultaneously improve the water flux and desalination rate. The modification method can be carried out at room temperature, can modify the existing reverse osmosis membrane assembly, and can also be implanted into the existing reverse osmosis membrane production line to modify and improve the membrane sheet, and the prepared high-flux and high-salt rejection rate reverse osmosis membrane can be applied to the fields of seawater or brackish water desalination, power plant water desalination, household water purification, sewage reuse, industrial wastewater treatment and the like.

A Fresnel spot lens desalinization system includes a Fresnel spot lens (FSL) disposed above a heating element. The heating element has a collector plate and a rod portion; The FSL concentrates solar energy onto the collector plate. A condenser vessel is connected to the collector plate. The rod portion extends into the condenser vessel having a heat resistant exterior shell. The rod portion projects interiorly of the condenser vessel at a downward angle and includes a top portion that is connected to a flat head of the heating element. The flat head receives the solar energy generated from FSL The concentrated solar energy increases the temperature of the heating element inside the condenser vessel to vaporize the salt water to steam and transfer the steam into a condensing tube to condense the steam into pure water.

A sea water desalination process and plant wherein intake sea water is delivered to at least one reverse osmosis pass comprising at least one reverse osmosis membrane to produce permeate product water and brine; wherein at least a portion of the brine is delivered to at least one reactor 2 for the removal of carbonates-based chemical in the brine by precipitating calcium carbonate. The calcium carbonate is converted in a regenerator 10 to produce calcium hydroxide and carbon dioxide. This provides for a series of benefits in the overall cost efficiency and sustainability of the process / plant.

The application provides a water desalination device and a manufacturing method thereof. The device comprises a shell; evaporation units and condensation units in parallel wave crest and trough are staggered in the shell, and the evaporation units are provided with the condensation units at both ends; the evaporation unit comprises an optical absorption layer and an evaporation surface, a transparent anti-convection cover is arranged above the optical absorption layer, the anti-convection cover is fixed on the upper surface of the shell, the upper and lower surfaces of the V-shaped structure are respectively arranged on the upper and lower parts of the optical absorption layer and the evaporation surface, and the lower end of the evaporation surface is inserted into a water tank for evaporation; the condensation unit comprises a cooling side and a condensation side, the cooling side and the condensation side are respectively arranged on the upper and lower sides of the upper surface of the shell, the cooling side comprises a plurality of 3D fins coated with a radiation refrigeration coating, and the condensation side comprises a plurality of hydrophobic copper columns; the water tank for evaporation is provided with a water inlet; the liquid drops of the condensation side are gathered at the bottom of the shell; and the bottom of the shell is provided with a water outlet. The application can effectively alleviate the fresh water crisis problem in energy shortage areas.

A water desalination device, comprising:a body having a lateral wall and defining a cavity for the desalination of water, wherein in said cavity are defined a desalination chamber and a condensation chamber, wherein the condensation chamber comprises a collection portion for desalinated water,a heater, configured to heat the water to desalinate in order to produce a steam,a cooler, configured to determine a condensation of a steam deriving from the heating of the water,whereinthe heater comprises a duct within which flows seawater at a first temperature (T1),the cooler comprises a duct within which flows seawater at a second temperature (T2),wherein said water desalination device is configured to maintain a pressure lower with respect to the atmospheric one within said cavity, and is operatively connected with a vacuum pump connected with said cavity,said water desalination device comprising a first supply device configured to supply seawater at said first temperature (T1) into the duct of the heater, and a second supply device configured to supply seawater at said second temperature (T2) into the duct of the cooler.

This provides a new technology that enables the recovery of high concentrations of CO2 from low concentrations of target gases. [Solution] The CO2 recovery system (1) includes a dehumidifying tower (10) and a CO2 absorption tower (20). Both the dehumidifying tower (10) and the CO2 absorption tower (20) include a configuration that cools the pipe structure (tower body 11 or vent pipe 24), which has an open upper end, from bottom to top, and this cooling causes the (dry) air to move from top to bottom within the pipe structure.

Disclosed is a water treatment apparatus using capacitive desalination. The water treatment apparatus comprises: a housing having an inlet and an outlet; a plurality of deionization units disposed in the housing; a plurality of dividers disposed between adjacent deionization units among the plurality of deionization units to partition the adjacent deionization units; and connection terminals disposed in the dividers and electrically connected to the adjacent deionization units to supply power.

The application provides a high-salinity water desalination device with a compressed air energy storage system, and belongs to the field of desalination and water treatment. The device comprises: a compressor unit for compressing external air to a high-pressure state; a heat storage and heat exchange system for heat exchange treatment of the high-pressure air; an air storage chamber for storing the high-pressure air after heat exchange treatment; a heat release and heat exchange system for preheating the high-pressure air; an expander unit for work using the preheated high-pressure air and for power generation of an engine; an evaporation tank for flash evaporation of hot water generated after heat exchange treatment of the high-pressure air and for steam generation; and a multi-stage evaporation device for high-salinity water desalination using steam as a heat source and for fresh water generation. The application can use the excess compression heat generated by the compressor unit as working steam of the multi-stage evaporation device, thereby improving the energy efficiency utilization rate of the compressor unit and reducing the cost of high-salinity water desalination of the multi-stage evaporation device.

A reverse osmosis system forming part of a reverse osmosis stage of a desalination water treatment plant, the reverse osmosis system has: a reverse osmosis unit having a reverse osmosis membrane housed in a pressure vessel extending longitudinally along an axis, and having a port extending along the axis: a conduit; and a permeate outlet segment connecting the port to the conduit, the permeate outlet segment having: a first connecting end hydraulically connected to the port of the reverse osmosis unit; a second connecting end hydraulically connected to the conduit; an elbow between the first connecting end and the second connecting end; and an inspection port stemming from the elbow, the inspection port being aligned with the first connecting end along the axis.

An integrated energy system comprising a power plant including at least one nuclear reactor and an electrical power generation system, the at least one nuclear reactor being configured to generate steam, and a supercritical water oxidation system operably coupled to the power plant. The supercritical water oxidation system including a desalination plant configured to produce first water and brine, a chlor-alkali membrane process configured to receive the brine and produce at least a Sodium Hydroxide solution, a reactor configured to receive the first water, the steam, and the Sodium Hydroxide solution to produce a waste solution and a solid waste, and a separator configured to receive the waste solution and produce Carbon Dioxide and second water.

Apparatus and methods for controlling a reverse osmosis system for water desalination to reduce energy consumption. The system has a controller configured to receive information from a sensor array and determine filtrate flow, filtrate salinity, and energy usage. Based on these determined parameters, the controller controls the feed water flow rate and the position of the condensate valve to meet predetermined filtrate flow and filtrate salinity criteria and reduce energy consumption.

The preparation method comprises the following steps: carrying out activation pretreatment on a reverse osmosis membrane base membrane, and introducing a functional anchor point group on the surface of the membrane; a layered assembly mode is adopted, an embedded hydrophilic barrier layer and a nanometer container type sterilization precursor layer are sequentially constructed, and the nanometer container type sterilization precursor layer contains a controllable release structure capable of responding to microbial metabolites or external stimulation; and real-time monitoring and modification regulation are carried out in the layered assembly process. According to the technical scheme, through the design of a controllable release structure, the long-acting antibacterial performance is guaranteed, and the influence of excessive sterilization on the film performance is avoided. Meanwhile, the uniformity and integrity of the functional layer are ensured through real-time monitoring and modification regulation, the service life of the membrane is remarkably prolonged, the operation stability of the membrane is remarkably improved, and the method has important significance in reducing the operation cost of the system and preventing secondary pollution.

A system is provided for the thermal separation of a process liquid using an immiscible liquid, in accordance with some embodiments. In some embodiments, the system comprises a precipitate extraction evaporator configured to receive the process liquid and immiscible liquid within an enclosed vessel. In some embodiments, the process liquid is injected into the immiscible liquid and undergoes phase change to form steam. In some embodiments, the steam is condensed by a condenser positioned above the immiscible liquid. In some embodiments, the condensed steam is collected and discharged as fresh water. In some embodiments, precipitate formed in the immiscible liquid is directed to a precipitate collection area. In some embodiments, a conveyor is configured to remove the precipitate from the enclosed vessel. In some embodiments, the system is integrated with one or more desalination and / or heat recovery subsystems.

A large scale water desalination process for producing at least 100,000 m3 / day of product water. Feed water is passed through a high pressure pump driven by at least one steam turbine capable of producing at least 1 MW of energy, the pressurized feed water passing through at least one reverse osmosis membrane to provide a residual brine stream and a product water. A start-up step slowly increases pressure in the membrane at a maximum rate of 12 psi (8.3 Newtons / cm2; 0.08 MPa) per second by rotation of the turbine driven high pressure pump at a maximum rate of 30 RPM to slowly increase pressure on the membrane to a predetermined operational pressure and controlling the operational pressure following the start-up step by rotation of the high pressure pump between 500 RPM and 5000 RPM dependent on the pressure applied by the steam turbine.

The invention relates to the technical field of fresh water treatment, in particular to an underground saline-alkali water desalination treatment device which comprises a front tank and a rear tank, the bottom of the front tank and the bottom of the rear tank are fixedly connected with a left base and a right base respectively, vacuum pumps are arranged on the front tank and the rear tank respectively, and spraying evaporation mechanisms are arranged on the front tank and the rear tank respectively. Heat pipes are fixedly connected to the interiors of the front tank and the rear tank, turnover heat exchange mechanisms are arranged in the heat pipes, each turnover heat exchange mechanism comprises a plurality of linings fixedly connected to the corresponding heat pipe, and heat exchange rotary drums are rotationally connected to the interiors of the linings. The evaporation boiling points of saline-alkali water in the two tanks are reduced to 37-46 DEG C and 30-38 DEG C respectively, the heating requirement is reduced, meanwhile, steam generated by the front tank serves as a heat source of a heat pipe of the rear tank, steam waste heat is fully recycled, compared with a traditional single-stage evaporation technology, energy consumption is reduced, and the energy-saving requirement is met.

An apparatus, system and method to purify water is disclosed. Pumps and energy recovery devices for taking water from an intake, filtering the water to remove solid contaminates before running the filtered water through the reverse osmosis system to the discharge device and purified water lines are described. The system may comprise a control panel that controls the plurality of filters, plurality of reverse osmosis membranes, purified water line and effluent discharge device, to achieve favorable water purification. A method that utilizes the apparatus and / or system is described herein.

The utility model discloses a mine water desalting and recycling device, which relates to the field of mine water recycling and comprises a sand filter tank, a mechanical filter, an ultrafiltration system, a first reverse osmosis system and a second reverse osmosis system, the first reverse osmosis system comprises a first reverse osmosis inlet concentration chamber and a first reverse osmosis deionization side, the second reverse osmosis system comprises a second reverse osmosis inlet concentration chamber and a second reverse osmosis deionization side, and the first reverse osmosis system and the second reverse osmosis system are both used for reverse osmosis membrane desalting operation of mine water. An outlet of the ultrafiltration system is connected with an inlet of a first reverse osmosis inlet concentration chamber of the first reverse osmosis system through a third pipeline, and an outlet of the first reverse osmosis inlet concentration chamber of the first reverse osmosis system is connected with an inlet of a second reverse osmosis inlet concentration chamber of the second reverse osmosis system. According to the mine water desalting and recycling device, impurities and salt can be efficiently removed, it is guaranteed that the water quality reaches the standard for recycling, concentrated water backflow utilization reduces the amount of concentrated water, the utilization rate of mine water is increased, and the reverse osmosis system can be conveniently cleaned.

A composite sorbent material comprising a few-layer 2D carbon allotrope impregnated with an ionic liquid is described. Also described are a method for producing said material, a composite material comprising said material, and the use of said material for thermal energy storage, sorption cooling, adsorption water desalination or air dehumidification

A system and method for water desalination using forward osmosis to address problems associated with scarcity of freshwater around the world. The system uses ammonium bicarbonate as the draw solution to draw out freshwater through a forward osmosis (FO) membrane from an amount of saltwater or other contaminated water initially directed through one side of the FO membrane. The ammonium bicarbonate draws the desalinated water through the membrane of the FO membrane. Brine or other solutes are directed away. The combination of desalinated water and ammonium bicarbonate is directed through a series of valves and pumps, including a heat pump, and through a hydrophobic membrane that allows freshwater (product water) to be obtained from the desalination process in a more cost-effective and efficient manner. The ammonium bicarbonate is recycled and reused to generate additional draw solution for additional batches of saltwater or contaminated water for desalination.

The application discloses a system and method for eliminating fog clusters and generating electric energy by air water extraction, and belongs to the technical field of environment and resource recycling. The system and method are used for solving the technical problems of high energy consumption, single function attribute and failure to effectively convert the gravity potential energy of fog drops, which leads to continuous power supply for remote road section monitoring equipment. The system comprises a detachable fog removal assembly, a water collecting tank and a Kelvin water drop power generation module. The application deeply couples the air water extraction assembly and the Kelvin water drop power generation module, relies on the gravity of the fog drops to complete the polarization, induction and positive feedback accumulation of electric charge, and does not need external power supply or complex power supply pipelines, so that the effect of green, low-cost and sustainable power supply for remote road section monitoring equipment is achieved.

The application relates to the technical field of saline-alkali soil improvement equipment, in particular to a saline-alkali water desalination treatment desalination equipment for saline-alkali soil treatment, which comprises a well pipe, a water pumping module, an impeller device and a plurality of filter core modules; the well pipe is embedded in saline-alkali soil, the top end of the well pipe protrudes from the ground of the saline-alkali soil, a plurality of leakage holes are arranged on the circumferential side wall of the well pipe, and the circumferential side wall surface of the well pipe is covered with filter cloth; the water pumping module is arranged on the well pipe and used for pumping saline-alkali water contained in the soil around the well pipe; the impeller device is connected with the water pumping module and used for driving the water pumping module to operate; the plurality of filter core modules are arranged in the interlayer cavities of a plurality of blades of the impeller device respectively and used for filtering the saline-alkali water. The device pumps the saline-alkali water in the soil into the blades through the water pumping device, and filters the saline-alkali water by using the filter core modules, so that the purpose of separating the salt from the soil is achieved, the defect that the soil improvement effect is poor in the prior art is solved, and the soil improvement effect of the device is enhanced.

A water and power generating system is disclosed, comprising at least one renewable energy generator, at least one submerged or floating desalination apparatus configured to be at least partially powered by the renewable energy generator, a controller, a desalinated water output conduit, and an electrical power output. The controller is configured to dynamically adjust the operation of the desalination apparatus in response to variations in available renewable energy and fluctuating demands for desalinated water and electrical power. Also disclosed is a water desalination system comprising a docking platform with a substantially tubular housing, mooring attachments, and ballast for vertical orientation. The docking platform may be connected to multiple floating desalination buoys. The platform may further include electrical and water distribution hubs for interconnection with the buoys and shore-based infrastructure. The desalination buoys may incorporate intake bubble curtain devices and brine dispersal systems to enhance intake quality and manage brine discharge.