37results about How to "Improve desalination efficiency" patented technology

The invention discloses a preparation method of a reverse osmosis membrane and the reverse osmosis membrane. The preparation method comprises the following steps: (1) adding polyethersulfone into N, N-dimethylacetamide in a heating and stirring state, and stirring for a period of time after charging is completed, so as to obtain a mixed solution; (2) cooling the mixed solution, continuing to add a pore-foaming agent, and stirring for a period of time after charging is completed to obtain a precursor solution; (3) performing vacuum defoaming treatment on the precursor solution to obtain a membrane casting solution; (4) loading the membrane casting solution on a carrier, and then carrying out gel bath treatment to obtain a base membrane; and (5) performing polyamide treatment on the surface of the base membrane to obtain the reverse osmosis membrane. The preparation method disclosed by the invention is simple in process and low in material cost, and the obtained reverse osmosis membrane has more uniform and more through-type pore structures, higher separation efficiency, more excellent chemical stability and better mechanical properties, can adapt to higher operation pressure, and can continuously and stably operate at higher flux under high pressure.

The invention relates to a solar seawater desalination plant, and relates to the technical field of seawater desalination, the solar seawater desalination plant comprises a raw water temporary storage tank, an evaporation tank and a fresh water storage tank, the evaporation tank is arranged at the upper part of the raw water temporary storage tank, an evaporation assembly and a collection assembly are arranged on the evaporation tank, and a flow guide assembly is arranged in the raw water temporary storage tank; the flow guiding assembly is connected with the collecting assembly and used for guiding condensate water to the fresh water storage tank. Seawater to be treated is guided into the raw water temporary storage tank, the water level rises to the evaporation tank, the evaporation assembly is started, condensed water formed after evaporation of the seawater is collected by the collection assembly, and the collected condensed water is guided to the fresh water storage tank through the flow guide assembly, so that condensation desalination of the seawater is realized, and a vacuum pump and a pressurizing device are not needed; the flow guide assembly is arranged in the raw water temporary storage tank, so that heat of condensed fresh water can remain in the raw water temporary storage tank to preheat the seawater to be treated, energy consumption and heat loss are reduced, and subsequent seawater evaporation and condensation efficiency is improved.

The invention relates to the technical field of comprehensive utilization of solid wastes, and discloses a soil conditioner prepared from coal-based solid wastes and a preparation method thereof, the soil conditioner comprises the following raw materials by weight: 80-100 parts of coal-based solid wastes, 5-15 parts of an inorganic salt material, 100-150 parts of pure water, 1-10 parts of a microbial agent fertilizer and 20-50 parts of crop straw biochar. According to the scheme, the inorganic salt is added, so that multivalent cations such as calcium, iron and aluminum are loaded on the coal-based solid waste and can be replaced with exchangeable sodium ions on soil colloid, and the soil desalting efficiency is improved; the crop straw biochar can increase the content of nutrient elements such as carbon, nitrogen and phosphorus for soil; the porous structure of the modified coal-based solid waste can provide a proper place for growth and reproduction of microorganisms, and the soil microenvironment is improved; the soil conditioner is simple in raw material composition, the coal-based solid waste is used as the main raw material for improving the saline-alkali soil, the source is wide, the production cost is low, pollution to the environment is avoided, and large-area popularization and application in saline-alkali soil areas can be facilitated.

The invention discloses a hydrogel evaporator for generating power by solar evaporation and a preparation method thereof, PVA is dissolved in deionized water to prepare a PVA solution, and then TOCNFs and SLS are added to prepare a polyvinyl alcohol / Tempo oxidized cellulose nanofiber / sodium lignin sulfonate (PTFS) suspension. Adding glutaraldehyde (GA) into the prepared suspension liquid, and adding a phytic acid solution (PA) and a multiwalled carbon nanotube dispersion liquid (CNT) after the suspension liquid is fully mixed, so as to prepare a PTFS hydrogel precursor solution; and directionally freezing the precursor solution by using liquid nitrogen, and finally freeze-drying to obtain the evaporation-power generation integrated low-latent-heat hydrogel evaporator. The prepared evaporator can generate clean water and electric power at the same time, and multi-stage utilization of energy is achieved. And the material also has excellent mechanical properties, is rich in internal water transmission channels, and has better adaptive capacity to the environment. The ultra-high evaporation rate can still be kept under high-intensity sunlight and in a high-concentration saline solution, and the seawater desalination efficiency of the solar evaporator is improved.

The solar-driven interface evaporation and condensation integrated seawater desalination device comprises a device shell, the device shell is in the shape of a right-angle triangular box with an inclined opening in the top, an evaporator is arranged in the device shell, and the evaporator is composed of a water storage layer, a supporting box body, a water conveying layer capillary tube and a photo-thermal conversion layer. The water storage layer is located in the supporting box body, the supporting box body is located at the inner corner of the device shell, the photo-thermal conversion layer is installed on the top of the supporting box body, a plurality of water conveying layer capillary tubes are fixedly connected to the bottom side wall of the photo-thermal conversion layer, and the bottom ends of the water conveying layer capillary tubes extend into the water storage layer. According to the solar seawater desalination device, the problem that evaporation is hindered due to water drop condensation caused by evaporation sealing is solved, the evaporation rate is increased, the evaporation process can be stably and efficiently carried out, the seawater desalination cost is saved, and the seawater desalination efficiency is improved.

The invention belongs to the technical field of seawater desalination assistance, and particularly relates to a seawater desalination assistance system capable of relieving the burden of a dialysis membrane, the seawater desalination assistance system comprises an electrolytic tank, a first channel, a second channel and a third channel are arranged in the electrolytic tank from left to right in sequence, and the first channel and the second channel are separated by an anion exchange membrane; the channel II and the channel III are separated by a cation exchange membrane, seawater enters and is discharged from two sections of the channel I, the channel II and the channel III through pipelines and electric control valves, and a water electrolysis device is mounted between the channel I and the channel III. The seawater desalination auxiliary system has the remarkable beneficial effects that firstly, the innovative multi-channel design is combined with the ion exchange membrane, so that the burden of the dialysis membrane is effectively relieved, the service life of the membrane is prolonged, the maintenance cost is reduced, meanwhile, the water electrolysis device and the control system cooperatively operate, accurate regulation and control can be realized according to the real-time state of seawater, and the service life of the membrane is prolonged. The seawater desalination efficiency is greatly improved, and the energy consumption is reduced.

An electro-adsorption device disclosed by the present invention comprises at least one electro-adsorption module, the electrode adsorption module comprises an electrode adsorption layer, a flow channel and a current-carrying plate, the first adsorption layer is located on the lower surface of the first current-carrying plate, the second adsorption layer is located on the upper surface of the third current-carrying plate, and the third adsorption layer is located on the lower surface of the third current-carrying plate. The fourth adsorption layer is positioned on the upper surface of the second carrier plate; the first adsorption layer and the second adsorption layer are arranged at intervals to form a first water flow channel, the third adsorption layer and the second adsorption layer are arranged at intervals to form a second water flow channel, and an outlet of the second water flow channel communicates with an inlet of the first water flow channel to form a flow channel; raw water flows into the outlet of the first water flow channel from the inlet of the second water flow channel and flows out for desalination, and the thickness of each adsorption layer is gradually reduced along the water flow direction in the desalination process. The electro-adsorption device has the advantages that the structure is simple and compact, the service life of the electrode adsorption layer is long, and the desalting efficiency is high. The invention further discloses an electro-adsorption system.

The invention provides a low-temperature heat supply reactor system which comprises a low-temperature heat supply reactor module which comprises three loops used for supplying steam to a user side; the multi-stage phase change heat storage module comprises a plurality of multi-stage phase change heat storage heat exchangers, and each multi-stage phase change heat storage heat exchanger comprises an outer wall, a phase change heat storage heat exchange assembly arranged in the outer wall and a phase change material filling layer filled between the phase change heat storage heat exchange assembly and the outer wall. A low-temperature working medium flow channel and a steam flow channel are formed in the phase change heat storage and exchange assembly, and the steam flow channel is connected with the end, close to the user side, of the third loop through a pipeline. According to the low-temperature heat supply reactor system, every two of seawater, extracted steam and a phase change material exchange heat with each other, redundant and any amount of high-temperature steam is discharged into the multi-stage phase change heat storage module to be stored, so that flexible peak regulation of the low-temperature heat supply reactor system is realized, and the stored heat can be used for heating the seawater entering the seawater desalination device; and the temperature of seawater entering the seawater desalination device can be controlled, so that the seawater desalination device operates stably and efficiently.

The invention discloses a desalination device combining seawater waste heat utilization with interface evaporation, comprising a base and a transparent top cover arranged on the base, a solar interface evaporation system and a membrane distillation system are arranged on the base, and both the solar interface evaporation system and the membrane distillation system are located in the transparent top cover; the solar interface evaporation system comprises a seawater pool arranged in the middle of the base and a first SSG water collecting tank and a second SSG water collecting tank arranged at both ends of the base, and an interface evaporation device is arranged in the seawater pool; the membrane distillation system comprises an MD water collecting tank and a cold water tank arranged on the base, and the MD water collecting tank is arranged between the seawater pool and the cold water tank, and a through hole is arranged on the pool wall between the seawater pool and the MD water collecting tank, and a PTFE membrane is fixedly installed in the through hole. Based on solar interface evaporation, membrane distillation technology is introduced, and the heat conducted to the seawater by the photothermal film is reasonably utilized to further improve the desalination efficiency of the desalination device and increase the fresh water output.

The invention discloses a reverse osmosis membrane assembly which comprises a reverse osmosis core and sealing covers mounted at two ends of the reverse osmosis core in a sealing manner, the reverse osmosis core comprises a middle inner membrane supporting layer as well as two groups of micro-filtration membranes and two groups of ultra-filtration membranes which wrap the outer side of the inner membrane supporting layer, a laminated pre-filtration layer is arranged between the micro-filtration membranes and the ultra-filtration membranes wrapping the inner membrane supporting layer, a PA reverse osmosis membrane wraps the rear parts of the micro-filtration membranes and the ultra-filtration membranes, and a separation net is arranged behind the PA reverse osmosis membrane; due to the synergistic effect of the multiple layers of membranes, the system can treat a more complex and worse seawater environment, and the stability and reliability of the effluent quality are ensured; due to the design of the laminated pre-filtering layer and the separation net, pollutants are effectively prevented from being in direct contact with the membrane holes and blocking the membrane holes, and the stability of the membrane assembly is further enhanced. Due to the introduction of the automatic backwashing device, the automatic backwashing device can be automatically started at regular intervals or according to a water quality monitoring result, the pre-filter is subjected to backwashing, the service life of the pre-filter is prolonged, and the maintenance cost is reduced.

The utility model provides a preserved szechuan pickle processing desalting device, and relates to the technical field of food processing, the preserved szechuan pickle processing desalting device comprises a storage box, the upper end of the storage box is provided with a cleaning cavity, the cleaning cavity is internally provided with an auxiliary mechanism, and the lower side of the front end in the cleaning cavity is provided with a liquid discharge pipe in a penetrating manner. Gas flows in the water flow along the exhaust grooves, so that the water flow is controlled to be continuously mixed and stirred through the flowing of the gas, the contact area of the water flow and raw materials is increased, the desalting efficiency of the raw materials is improved, and the water flow and the raw materials are controlled to be mixed and stirred through the stirring of the gas. The damage to the raw materials in the desalting processing can be reduced, and the raw materials can be better protected.

The invention discloses a sea water desalination device capable of comprehensively utilizing ocean energy, and relates to the technical field of sea water desalination. The bottom of a connecting frame is connected with a condensation cover, the bottom of the condensation cover is connected with a U-shaped groove, the output end of an adjusting motor is connected to one end of the bottom of a supporting plate, and one end of the top of the supporting plate is connected with a reflection focus lens through a universal joint; by controlling the adjusting motor and the adjusting electric push rod to be matched with the universal joint and the rotating seat, multi-angle adjustment of the reflecting focus lens is achieved, the adjusting motor and the adjusting electric push rod are matched with the universal joint and the rotating seat, and the adjusting motor and the adjusting electric push rod are matched with the universal joint and the rotating seat to adjust the reflecting focus lens. The stirring motor drives the stirring rod and the scraping rod to stir seawater in the evaporation boiler, so that separated crystal salt is prevented from covering the water surface and hindering evaporation of water, the operation stability of the device is ensured, and the fresh water preparation speed is increased.

This disclosure presents an all-weather intelligent desalination device, comprising a high-transparency top cover, a solar energy storage device, and a housing. The housing includes a first chamber and a second chamber. A plurality of photothermal devices are disposed within the first chamber and connected to the housing via a rotating shaft. A raw water storage chamber is formed between the photothermal devices and the bottom of the housing. An evaporation and condensation chamber is formed between the photothermal devices and the high-transparency top cover. The photothermal device includes a photothermal structure and a hydrophobic layer, a first hydrophilic layer, a second hydrophilic layer, and a third hydrophilic layer disposed outside the photothermal structure. The first hydrophilic layer surrounds the periphery of the hydrophobic layer, forming a first planar structure. The second hydrophilic layer is perpendicular to the first planar structure. The third hydrophilic layer is connected to the second hydrophilic layer and forms a second planar structure. This device can achieve high-efficiency seawater desalination in all weather conditions and can adjust the rotation of the photothermal devices according to different light intensities to achieve efficient evaporation, greatly improving desalination efficiency.

The invention discloses a seawater desalination device and a method for co-producing bromine and sea salt through seawater desalination, and belongs to the technical field of seawater desalination. A seawater desalination device comprises a box body and water collecting cloth installed in the box body, and further comprises a sliding rail with a sliding block, the sliding rail is transversely and fixedly connected between the inner walls of the box body, a support is installed below the sliding block, and a driving part for driving the sliding block to slide is arranged on the box body; the installation block is longitudinally installed on the support in a sliding mode, two pressing rollers are rotatably installed on the installation block and attached to the upper surface and the lower surface of water collecting cloth, a water collecting box is installed on the support, a connecting part is arranged on the support, and when the driving part drives the sliding block to transversely slide, the connecting part drives the pressing rollers to longitudinally extrude the water collecting cloth; under the transmission of the driving part and the connecting part, the compression roller is driven to continuously and transversely extrude and longitudinally extrude the water collecting cloth, and the extruded fresh water is collected by the water collecting box, so that the seawater desalination efficiency is improved.

The invention discloses a porous photo-thermal composite material formed by three-dimensional staggered piling and a preparation method and application thereof. The preparation method comprises the following steps: S1, constructing a three-dimensional model with a microporous structure arranged in a staggered layer in a three-dimensional space, and performing slicing treatment to obtain three-dimensional model data; s2, the bio-based wire is fed into a material storage bin, the three-dimensional model data in the step S1 are imported into a 3D printer, staggered layer-by-layer printing is conducted in the vertical direction, and a three-dimensional porous photo-thermal composite material blank is obtained; s3, the surface of the blank is coated with a polyvinyl alcohol solution, and adsorption and drying are conducted under the vacuum condition; obtaining a finished product. The porous bio-based composite material with an irregular microporous structure is prepared by stacking a network with a complex stacking structure in a three-dimensional space through three-dimensional staggered-layer arrangement, stacking and printing. And the aperture is reduced, so that a more obvious capillary action is generated, and the water evaporation and desalination efficiency is remarkably improved.

The present invention relates to the field of organic amine liquid purification, and discloses a system for removing heat-stable salts in organic amine liquid and a method for treating organic amine liquid using the system. The system comprises: an organic amine liquid storage device, an electrode liquid storage device, a desalted water storage device and a membrane stack, wherein the membrane stack is respectively connected with the organic amine liquid storage device, the electrode liquid storage device and the desalted water storage device, and forms an organic amine liquid circulation loop, an electrode liquid circulation loop and a desalted water circulation loop respectively, and the system also comprises a conductivity meter and a control center, wherein the control center is used to receive a conductivity signal from the conductivity meter, and adjust the circulation flow of the organic amine liquid circulation loop and the desalted water circulation loop, and the reuse and discharge of the organic amine liquid and waste liquid according to the conductivity signal of the conductivity meter. When treating the organic amine liquid, the system can remove anions and cations in the amine liquid synchronously, and reduce the consumption of alkali liquid and the discharge of waste liquid.

The utility model is applicable to the technical field of seawater desalination, and provides a high-reliability seawater desalination device which comprises a bottom plate, one end of the upper surface of the bottom plate is fixedly connected with a supporting seat, the top of the supporting seat is fixedly connected with a containing box, and the other side face of the containing box is provided with a rotatable heat insulation box through a driving mechanism. And a plurality of heating rods are vertically arranged at the bottom of the inner wall of the heat insulation box. According to the high-reliability seawater desalination device, the heat insulation box is driven by the driving mechanism to rotate, after the heat insulation box rotates until the opening part faces downwards, the transverse plate is driven by the transmission mechanism to move, the scraping plate can be driven to move by utilizing connection of the vertical rod, and after the scraping plate drives the scraping cylinder to move, the scraping cylinder is driven to move. And the dirt on the surfaces of the heat insulation box and the heating rod can be scraped, the surfaces of the heat insulation box and the heating rod are automatically cleaned, subsequent heating of seawater is facilitated, the heating effect of the seawater is improved, and then the seawater desalination efficiency is improved.

A water desalination method. In this method, an electrowetting device is provided above the water to be desalinated, wherein the electrowetting device includes a conductive substrate and an insulating layer covering the surface of the conductive substrate. The electrowetting device adsorbs water vapor of the water to be desalinated above a surface of the insulating layer. A discharge device is used to perform a discharge treatment on the surface of the insulating layer to charge the water vapor. During the discharge treatment, electricity is applied to the conductive substrate so that the conductive substrate and the charged water vapor have different electrical properties, thereby attracting the charged water vapor to the surface of the insulating layer and condensing it into water on the surface of the insulating layer. When the water on the surface of the insulating layer accumulates to a preset amount, the electrowetting device is transferred to the top of the fresh water collection tank and the application of electricity is stopped. In this way, water desalination can be successfully completed under low energy consumption, so the cost of water desalination can be greatly reduced.

The present invention discloses an application of microalgae carbon as a particle electrode in flow electrode capacitive desalination. The preparation method of the microalgae carbon comprises the following steps: heating the microalgae particles to 600-1000°C at a heating rate of 1-10°C / min under vacuum conditions, and keeping the temperature for 2-10 hours, cooling, washing, and drying to obtain the microalgae carbon. The present invention converts microalgae into microalgae carbon and uses it in a flow electrode capacitive desalination device, which has a higher desalination efficiency than an activated carbon particle electrode.

The present invention provides a combined multi-storage bin desalination device, which relates to the technical field of seawater desalination, and comprises: a storage component; the water retaining component is installed on the top of the storage component; the seawater desalination component is installed on the storage component; the sealing component is installed on the top of the storage component; the filtering component is installed on the top of the storage component; the emptying component is installed inside the storage component; the storage bin A is fixedly installed on the top of a bottom plate, and a strip hole A is provided on the rear side of the storage bin A; the storage bin B is fixedly installed on the top of the bottom plate; the present invention facilitates workers to quickly add seawater to be desalinated, reduces downtime, and improves the desalination efficiency of seawater; and solves the problem that it is inconvenient for workers to store seawater in advance, resulting in a long downtime of the device when adding seawater, thereby reducing the desalination efficiency of seawater.

The utility model discloses a brackish water desalination and water purification device for alpine regions, which relates to the technical field of brackish water desalination and water purification equipment for alpine regions, and adopts the technical scheme that the brackish water desalination and water purification device comprises a reverse osmosis water purification unit arranged on a bottom plate, and a quartz sand filter, an activated carbon filter and a softening filter are arranged behind the reverse osmosis water purification unit; the quartz sand filter, the activated carbon filter and the softening filter respectively comprise a tank body, and the three tank bodies are communicated with one another. The device has the beneficial effects that the arc-shaped heating unit is adopted and is tightly attached to the outer wall of the tank body, so that the heating efficiency is improved, and the heat loss is reduced. The adjustable limiting and fixing mechanism is adopted, disassembly and assembly are convenient, adjustment can be conducted according to different environment temperatures, and energy is saved.

The application discloses a carbon aerogel adsorption electrode and an electric adsorption system based on the carbon aerogel adsorption electrode, and a method for preparing the carbon aerogel adsorption electrode. The method adopts normal pressure drying technology, greatly reduces energy consumption in the electrode preparation process while ensuring that the electrode has large porosity. Compared with the existing electric adsorption process for regenerating circulating cooling water, the electrode regeneration process needs to be suspended for adsorption, which influences the adsorption and regeneration efficiency. The application adopts ex-situ regeneration electric adsorption, improves ion adsorption capacity, and realizes electrode regeneration in ex-situ, thereby ensuring continuous operation of the electric adsorption process, improving the adsorption and regeneration efficiency, and further improving the desalination efficiency. The electric adsorption system can be used for removing anions and cations of the circulating cooling water, and the obtained regenerated water can be used as make-up water for a cooling tower.

The application discloses a kind of high-efficiency synergic seawater desalination device in the technical field of seawater desalination, including side support frame and control system, side support frame is provided with seawater desalination module between, seawater desalination module can utilize the principle of forward osmosis to carry out seawater desalination, and the both ends of seawater desalination module are respectively set as salt difference energy conversion module and draw solution processing module;Seawater desalination module includes: desalination pipe body, desalination pipe body is provided with multiple groups and parallel equidistant distribution between side support frame, and forward osmosis module is fixedly installed in desalination pipe body, and forward osmosis module is divided into draw solution storehouse and seawater infiltration storehouse, and draw solution storehouse is provided with dispersion component;Seawater storage tank, one end of desalination pipe body is fixedly connected with seawater storage tank, and the application is cooperated by multiple desalination pipe bodies and dispersion component, solves the existing problems in prior art device, such as the performance contradiction of forward osmosis membrane, the low salt difference energy conversion efficiency, the insufficient energy recovery and the high desalination energy consumption.

The invention relates to the technical field of water treatment, and specifically discloses a CDI nanofiltration component and device for desalination by using a capacitive deionization enhanced separation membrane, comprising a membrane shell and a membrane core, wherein the membrane core is located inside the membrane shell; the membrane core comprises a filter membrane in a winding structure and a central tube arranged inside the filter membrane; the filter membrane comprises an insulating layer A, a current collector A, an anode plate layer, a guide plate A, a nanofiltration membrane layer A, a water production spacer, a nanofiltration membrane layer B, a guide plate B, a cathode plate layer, a current collector B and an insulating layer B which are stacked in sequence; a plurality of adsorption holes are provided on the anode plate layer and the cathode plate layer, the guide plate A is connected to the current collector A through the adsorption holes, and the guide plate B is connected to the current collector B through the adsorption holes; a spiral dirt cleaning part is rotatably provided on one side of the guide plate A and one side of the guide plate B. The invention has the characteristics of small concentration polarization, weak inorganic salt scaling and small desalination load.

The invention relates to a seawater desalination method and a seawater desalination system. The seawater desalination method comprises the following steps: filtering seawater to obtain a filtrate, wherein the filtration membrane used in the filtering process is a polymer membrane containing a photocatalyst, and the photocatalyst is a porous polymer nanosphere containing a graphitized titanium-based framework material; the filtrate is subjected to a reverse osmosis process to obtain reverse osmosis produced water, wherein the reverse osmosis membrane used in the reverse osmosis process comprises a support membrane and a polyamide layer and a porous polymer layer sequentially stacked on the surface of the support membrane, wherein the polyamide layer contains a layered ionic covalent organic framework material, and the porous polymer layer contains a positively charged crystalline polymer; and the reverse osmosis produced water is subjected to a disinfection process to obtain desalinated water. The seawater desalination method can not only improve the desalination efficiency of seawater, but also does not require pretreatment of seawater, has a simple process, small footprint, low cost, and good anti-pollution performance, and can ensure the long-term operation stability of the seawater desalination system.

The invention relates to the technical field of seawater desalination, and discloses a freezing method seawater desalination device, which comprises a seawater container and an LNG container, the LNG container is arranged near the lower part of the exterior of the seawater container, the two ends of the top of the LNG container are fixedly connected with an inlet and outlet connecting pipe, and the exterior of the LNG container is wrapped with a thermal insulation cylinder; an end plate is fixedly arranged on the upper end face of the seawater container, a cover plate is fixedly arranged at the upper end of the end plate, a rotating column is rotationally connected to the middle of the seawater container, a spiral scraper is fixedly arranged on the outer side wall of the rotating column, water leakage holes distributed in an annular array mode are formed in the scraper, and the upper portion of the rotating column is connected to the middle of the cover plate in a penetrating mode. Ice residue outlets are formed in the front end and the rear end of the cover plate, and limiting grooves are formed above the ice residue outlets; an ice residue discharging lifting shielding mechanism is arranged above the ice residue outlet, and an ice residue discharging limiting mechanism is arranged on the inner side of the upper portion of the limiting groove. The low-temperature characteristic of LNG is used for freezing seawater, and the purpose of seawater desalination is achieved.

The invention relates to the technical field of membrane separation, in particular to a device and method for improving desalination efficiency of a desalination membrane by using in-situ nanobubbles, and the device comprises one or more than one gas-liquid mixing and dissolving device and one or more than one membrane desalination device; desalted water sequentially passes through one or more gas-liquid mixing and dissolving devices and one or more membrane desalting devices, gas dissolution saturation of water is realized by arranging the gas-liquid mixing and dissolving device on a pipeline at the front section of the membrane desalting device, and after the water enters the membrane desalting device, a salting-out effect is formed in a high-salinity area on the surface of a desalting membrane, so that the desalting effect is realized. The dissolved gas molecules are separated out and gathered to form a large number of nano bubbles, the salt crystallization process is dispersed, the number of crystals is increased, but the sizes of the crystals are reduced, the blockage degree of salt crystallization to a membrane is relieved, the desalination efficiency is improved, the follow-up membrane cleaning difficulty is reduced, and the device is simple in structure, low in energy consumption and very suitable for reverse osmosis desalination and pervaporation desalination processes.

The invention relates to the technical field of demineralized water treatment devices, in particular to a thermal power generating unit cooling demineralized water closed circulation device which comprises a base, and a cation exchanger and an anion exchanger are fixedly installed on the two sides of the front end of the upper end face of the base respectively. The water inlet end of the top of the back face of the cation exchanger communicates with a water guide pipe, the water outlet end of the cation exchanger communicates with the water inlet end of the top of the back face of the anion exchanger through a guide pipe, a second valve is arranged on the guide pipe, and a hole is formed in the top of the anion exchanger and communicates with a liquid inlet pipe. The two sides of the end, away from the anion exchanger, of the liquid inlet pipe communicate with a solution communicating pipe and a clear water communicating pipe correspondingly, and the water outlet end of the bottom of the back face of the anion exchanger communicates with a drainage pipe. The cooling effect of the generator set is guaranteed, and through automatic control and resource recovery design, the regeneration effect of resin is optimized, and the service life of the resin is prolonged.

The invention discloses a self-standing floating type seawater desalination device which comprises an evaporator, a water storage assembly, a floating device and a water supply device, the evaporator is assembled above the water storage component and is used for receiving and evaporating seawater stored by the water supply device; the water supply device is assembled below the water storage assembly; the water storage assembly is assembled between the water supply device and the evaporator and used for storing fresh water. The floating device is assembled on the outer side of the water storage assembly; an anti-backflow device is assembled in the water storage component; the device is simple in structure and easy and convenient to operate, the water supply device can achieve automatic water supply on the sea surface, and therefore the automatic evaporation function and the automatic water storage function are integrated, and the automation degree and efficiency of the device are remarkably improved; the anti-backflow device effectively reduces fresh water loss caused by factors such as strong wind or sea waves, and reduces resource waste.

According to the low-corrosion anti-scaling urea hydrolysis system and the energy-saving operation technology, a multi-stage electrodialysis module and a heat exchange system are additionally arranged on the basis of a conventional urea hydrolysis system, and a high-temperature raw water outlet pipeline of a urea solution preparation tank is connected with a first heat exchanger; a low-temperature raw water outlet pipeline of the first heat exchanger is connected with a multi-stage electrodialysis module, a low-temperature produced water outlet pipeline of the multi-stage electrodialysis module is connected with a second heat exchanger, a high-temperature produced water outlet pipeline of the second heat exchanger is connected with a urea solution preparation tank, and heat exchange medium pipelines of the first heat exchanger and the second heat exchanger are circularly connected; the urea solution preparation tank is sequentially connected with the urea solution storage tank and the urea hydrolysis reactor. The heat exchange system is utilized, it is ensured that high-concentration urea solution can be efficiently subjected to electrodialysis treatment, waste heat utilization of refrigerants is achieved, energy-saving operation of the system is achieved, low corrosion and scaling prevention of the urea hydrolysis system are achieved through electrodialysis, and the discharge capacity of the urea hydrolysis reactor is greatly reduced.