295 results about "Salt crystallization" patented technology

The invention relates to the technical field of control and regulation systems, in particular to a photovoltaic module anomaly recognition method based on laser detection, which comprises the following steps: generating a clock signal synchronous with a laser scanning time sequence through a hardware synchronous trigger, and driving a temperature and humidity sensor, a salt mist sensor and an illumination intensity sensor to collect environmental parameters; and constructing a multi-source data set containing the salt crystallization trend and the environmental interference level. And based on a temperature and humidity segmented compensation reflectivity base line, a salt mist mode switching optimization dust retention judgment threshold value, and illumination correlation sensitivity adjustment hot spot detection parameters, dynamic model correction is realized. And a fault database is matched to trigger a grading alarm mechanism, and a decision tree classifier is combined to verify time continuity to generate a diagnosis report. A dynamic detection path is constructed through spiral path planning, a multi-machine contract network protocol and wind disturbance trajectory correction, data feedback is executed to form closed-loop control logic, and the problems of misjudgment and missing detection in high salt mist, temperature change and illumination fluctuation environments are effectively solved.

The invention discloses a preparation method of a salt-resistant polyurethane sponge evaporator for a photo-thermal interface, which comprises the following steps: taking polyurethane sponge as a support framework, taking polyvinyl alcohol as a precursor solution, adding carbon black and PEDOT: PSS (poly (3, 4-ethylenedioxythiophene): poly (styrenesulfonate)) into the precursor solution as photo-thermal materials, and synthesizing the salt-resistant polyurethane sponge evaporator by an extrusion thermal crosslinking freeze-drying method. According to the obtained evaporator, the excellent photothermal conversion performance of carbon black / PEDOT: PSS and a porous framework structure mainly comprising polyurethane / polyvinyl alcohol are fully utilized, the water absorption, the mechanical performance and the photothermal conversion efficiency of the evaporator are effectively improved, the heat conductivity is reduced, it is guaranteed that salt crystals do not appear inside and on the surface of the evaporator while efficient interface evaporation is achieved, and the service life of the evaporator is prolonged. The device can be widely applied to solar interface evaporation in saline water, actual seawater or high-salinity wastewater so as to obtain clean water resources.

The invention discloses a high-salinity wastewater evaporative crystallization device and an operation method thereof, and relates to the technical field of wastewater evaporation. Comprising a treatment main body and a material distribution assembly for discharging pretreated salt crystals in batches; the heating assembly is used for heating the high-salt crystals in the pipeline; the shunting assembly is used for evaporating a high-viscosity concentrated solution in the salt crystal; the guide assembly is used for preventing the high-salt crystals from being adhered in the pipeline; the circulating assembly is used for recycling the air heated by the pipeline, and reheating and reusing the air; the evaporation assembly is used for evaporating most of water in the wastewater; and the stirring assembly is used for stirring the heated wastewater. High-salt crystals on the surface of the screen are stirred through a plurality of material stirring plates arranged on the inner wall of the rotating shaft ring, so that mutual adhesion of high-salt crystal clusters is avoided, and the problem that in the using process of a traditional high-salt wastewater evaporative crystallization device, due to mutual accumulation of the high-salt crystals after high-salt wastewater is evaporated, the high-salt crystals are easily separated from the screen is further solved. Therefore, the high-viscosity concentrated solution inside is difficult to effectively strip.

The invention discloses a concrete model under salt freezing circulation, a construction method and a construction method of a damage evolution model, and a salt freezing circulation process is simplified into processes of continuous accumulation of sulfate crystals in pores, water condensation into ice, and repeated expansion and contraction of ice melting into water. The process of continuous accumulation of pore sulfate crystals in the sample concrete model and the process of mortar reduction and porosity increase in the sample concrete model are simulated, model parameters are adjusted, so that the salt freezing process of the sample conforms to the actual situation, and the service life of concrete is predicted through the sample concrete model. A specific time node reaching a failure standard is accurately predicted; the invention discloses a concrete damage evolution model based on the combination of continuous damage mechanics and a crack propagation theory, and aims to solve the problem that a traditional concrete damage model cannot accurately predict concrete damage evolution in a salt freezing circulation environment, and particularly, the long-term influence of the salt freezing environment on a concrete structure is lack of accurate quantitative analysis.

The invention discloses a high-temperature-resistant low-damage high-density solid-free well killing fluid which comprises 50-80 parts of water, 10-40 parts of calcium chloride, 10-40 parts of calcium bromide, 0.5-2 parts of a temperature-resistant tackifier, 1-3 parts of a temperature-resistant filtrate reducer, 0.5-2 parts of a high-temperature stabilizer, 0.5-3 parts of a high-temperature corrosion inhibitor, 0.5-2 parts of a salt crystallization inhibitor and 0.1-1 part of a waterproof locking agent. The technical problems that the saline water base fluid is unstable in density in a high-temperature environment, a reservoir is damaged, and a shaft is corroded are solved. The invention also discloses a preparation method of the high-temperature-resistant low-damage high-density solid-free kill fluid, which comprises the following steps: adding the water into a stirring kettle, then adding the calcium chloride, the temperature-resistant filtrate reducer, the temperature-resistant tackifier and the high-temperature corrosion inhibitor, uniformly stirring, and supplementing the calcium bromide during stirring to obtain a mixture; a salt crystallization inhibitor is injected into the stirring kettle, meanwhile, a high-temperature stabilizer is added, the stirring kettle is heated for full stirring, and the well killing fluid is obtained.

The invention relates to the technical field of salt-containing mine water treatment, and discloses a salt-containing mine water zero discharge treatment method for external cooler in-situ descaling, which comprises the following steps: S1, carrying out suspended matter removal and membrane concentration on salt-containing mine water, and sequentially carrying out evaporative crystallization to separate anhydrous Na2SO4, freezing crystallization to separate mirabilite, evaporative crystallization to separate NaCl and drying to obtain carnallite; collecting steam condensate water formed after heat exchange of the steam condensate water used in the evaporative crystallization and steam condensate water evaporated in the drying process; s2, when scale is formed in a cold exchange pipe of the external cooler used in the freezing crystallization process in the step S1, the scale is removed by adopting the following method: refrigerating fluid in the external cooler is subjected to heat exchange by adopting the steam condensate water collected in the step S1, and then flows back into a refrigerating fluid pipeline of the external cooler; and / or live steam is introduced into the cold exchange pipe. According to the method, in-situ descaling can be achieved under the condition that the external cooler is not disassembled, the labor cost can be reduced, and the salt separation crystallization treatment efficiency is improved.

The invention discloses an electric pulse and salt crystallization synergetic coal seam anti-reflection system and method, and the system comprises a salt solution preparation tank which is internally provided with a Na2SO4 saturated solution; one ends of the first high-pressure water injection pump and the second high-pressure water injection pump are respectively communicated with the salt solution preparation tank, and the other ends of the first high-pressure water injection pump and the second high-pressure water injection pump are respectively communicated with the negative electrode drill hole and the positive electrode drill hole through a first pipeline and a second pipeline; the positive electrode end of the electric pulse generating device is connected with a positive electrode, the positive electrode is arranged in the positive electrode drill hole, the negative electrode end of the electric pulse generating device is connected with a negative electrode, the negative electrode is arranged in the negative electrode drill hole, and the electric pulse generating device is configured to generate a large number of microfractures in the coal body by utilizing the electrogenerated shock wave and the Joule heating effect and drive the Na2SO4 saturated solution to diffuse towards the deep parts of the fractures; and the first cooling jet device and the second cooling jet device are respectively communicated with the negative electrode drill hole and the positive electrode drill hole and are configured to respectively inject a low-temperature medium into the negative electrode drill hole and the positive electrode drill hole.

The present invention provides a high-efficiency buoyancy-driven convection-based 3D solar evaporator designed for the simultaneous rejection of salt and stable evaporation of high salinity water. The product combines different strategies, including engineered wick structure, low tortuosity macrochannels and edge-preferential salt crystallization. As a result, this evaporator demonstrates a stable evaporation rate of at least 2.5 kg m−2 h−1 under solar irradiance of 1 kW m−2 with sea water or salt solution of salinity of over 8 wt %.

The invention provides a high-concentration brine treatment system, and belongs to the technical field of high-concentration brine treatment. Comprising a mounting mechanism, a spraying mechanism and a storage barrel, the mounting mechanism comprises a box body, a partition plate is arranged in the box body, a collection box is arranged on one side of the partition plate, a plurality of crystallization fillers are arranged in the collection box, a crystallization filter element is arranged in each crystallization filler, and a plurality of crystallization filter elements are arranged in the storage barrel. A partition plate is arranged in the box body, a material guiding plate is arranged above the partition plate, a spraying mechanism is arranged on the side face of the box body, a first material pumping pump is arranged on one side of the partition plate, a first feeding pipe is arranged on one side of the first material pumping pump, and the first feeding pipe penetrates through the partition plate and extends into the collecting box. According to the high-concentration salt water desalting device, high-concentration salt water can be fully treated, the desalting efficiency of the high-concentration salt water is improved, salt stains adhered to the inner wall of the material storage barrel can be cleaned, salt stain residues are reduced, and therefore residual salt crystals in the material storage barrel can be better treated.

The invention discloses an ion separation solar evaporator and a preparation method thereof, and belongs to the technical field of magnesium-lithium separation. The ion separation solar evaporator comprises a transmission channel made of a two-dimensional layered material, an ion separation nanofiltration membrane, a capillary layer made of hydrogel and a water evaporation area made of a two-dimensional layered material composite surface plasmon material which are sequentially stacked, and a salt crystallization region made of a two-dimensional layered material composite rheology modifier is arranged around the water evaporation region. According to the invention, efficient selective separation of magnesium and lithium in salt lake brine / seawater is realized through a solar-driven nanofiltration membrane separation technology, the bottleneck of high energy consumption of a traditional lithium extraction process based on a nanofiltration membrane is broken through, and the salt lake brine does not need to be pretreated. In addition, lithium-containing salt can be directly collected, the subsequent treatment process is greatly simplified, and an environment-friendly, economical and efficient solution is provided for development of salt lake lithium resources.

The invention discloses a hydraulic hoist for a water conservancy gate, which belongs to the field of gate opening and closing and comprises an oil cylinder, a hydraulic unit fixedly connected to the outside of the oil cylinder, a motor III fixedly connected to one side of the hydraulic unit and a piston rod connected to the inside of the oil cylinder, and an extension ring part is integrally formed on the outer surface of the oil cylinder; the exterior of the oil cylinder is further connected with a salt removing unit, the salt removing unit comprises a box body fixedly connected to the exterior of the oil cylinder and used for storing a neutral cleaning agent and a liquid supply pump fixedly connected to one side of the box body, salt on the outer surface of the piston rod can be washed through the neutral cleaning agent in the box body, visible salt crystals are removed through water flow impact force, and the salt removing efficiency is improved. And meanwhile, the salt removing unit can spray anti-rust oil to the outer surface of the piston rod, the anti-rust oil can permeate into tiny concave-convex parts on the metal surface, tiny defects and capillary pores are sealed, permeation of corrosive media is reduced, salt attached to the metal surface again can be reduced through covering of the anti-rust oil, and the secondary protection effect is achieved.

The utility model relates to a stable gathering and transporting device and system for oil field produced liquid, the stable gathering and transporting device for the oil field produced liquid comprises a piston cylinder body, a piston, a one-way valve, a centrifugal machine and a communicating pipe, the side wall of the piston cylinder body is communicated with a produced liquid output port of an oil well Christmas tree through the communicating pipe, and the one-way valve is arranged on the communicating pipe; a liquid outlet is formed in the bottom of the piston cylinder body and communicated with an inlet of the centrifugal machine with the freezing function through a liquid pipeline, the piston is arranged in a cavity of the piston cylinder body and connected with a piston connecting rod, and the piston connecting rod extends out of the upper end of the piston cylinder body and can drive the piston to move up and down to open or plug the liquid outlet. Fluid in the piston cylinder body is pushed to flow to the centrifugal machine. Through the arrangement of the piston cylinder body, the piston, the one-way valve, the centrifugal machine and the communicating pipe, salt crystals in an oil-water mixture of produced liquid can be separated from the oil-water mixture by utilizing the centrifugal machine, the faults of a produced liquid gathering and transportation system caused by blockage of the pipeline by the salt crystals are eliminated, and stable and continuous gathering and transportation of the produced liquid of an oil field are realized.

The invention belongs to the technical field of energy storage batteries, and particularly relates to a desalting, dehumidifying and cooling integrated thermal management device and method for a marine environment energy storage battery. The device is composed of an energy storage battery module, an air inlet dehumidification and desalination module, an air return reprocessing module, a salt crystallization and separation module, a cold source heat exchanger and a heat source heat exchanger. Wherein the inlet air dehumidification and desalination module cools inlet air by utilizing a first solvent and inlet air cross flow heat exchange mode, meanwhile, the first solvent dissolves salt mist ions in inlet sea wind, and the purposes of reducing the dew point temperature and dehumidifying the inlet sea wind are further achieved; in order to ensure water-salt concentration balance of the first solution, a salt crystallization precipitation module and a return air retreatment module are adopted to jointly adjust the concentration of the first solution. A solution is provided for safe and reliable operation of the energy storage battery system under the ocean high-temperature, high-humidity and high-salt links.

The invention discloses a hot-dip galvanizing strip steel production waste gas treatment mechanism, and relates to the technical field of hot-dip galvanizing strip steel production, the hot-dip galvanizing strip steel production waste gas treatment mechanism comprises a treatment tower body, the treatment tower body comprises a gas inlet dispersion area, a treatment area I, a treatment area II, a treatment area III and a gas exhaust area which are sequentially distributed from bottom to top, and the left side of the upper part of the gas inlet dispersion area communicates with a gas inlet; the top of the exhaust area is communicated with an exhaust port, and the treatment tower body is provided with a spraying unit for spraying alkaline liquid drops to the acid waste gas. The device has the advantages that the main movable assembly and the driving assembly are matched to drive the filler to move in a small range in the annular space, and the filler collides with each other, so that the surface and internal pores are prevented from being blocked by salt crystals and other dirt generated in the reaction; the disturbance block further disturbs the motion trail of the filler while the filler collides in a small range all the time; and spraying operation is matched for flushing, so that the anti-blocking effect is further improved, and the waste gas treatment efficiency is improved.

The invention relates to the technical field of sodium chloride crystal preparation systems, in particular to a sodium chloride crystal preparation system which comprises a crystal separation tank, an annular isolation cylinder 2, a first heat exchanger, a center cylinder and an annular isolation cylinder. The annular isolation barrel is provided with an upper guide section and a lower acceleration section which are sequentially connected, the upper end of the upper guide section is fixedly connected to the inner circumferential wall of the crystallization separation tank, the upper guide section is gradually and downwards inclined from outside to inside of the crystallization separation tank, and the lower acceleration section is located at the lower end of the upper guide section. Through circulating conveying of the first conveying pump and cooperation of the first conveying pump, the heating mechanism and the fine grain eliminating mechanism, circulating treatment of brine in the crystallization separation tank is achieved, the functions of particle size grading and particle size growth are achieved, the salt crystallization process is optimized, the proportion of the salt product with the size smaller than 450 micrometers is reduced to be within 18% from 45%, and the crystal breaking force is enhanced and is increased to 3.30-6.77 N from 1.39-6.61 N.

The invention discloses an impurity removal device and an impurity removal method for salt separation crystallization mother liquor of chemical high-salt wastewater, and belongs to the technical field of comprehensive utilization of water resources. The impurity removal device comprises a high-density sedimentation tank for receiving high-salinity wastewater salt separation crystallization mother liquor; the first-stage reactor is connected with the high-density sedimentation tank through a pipeline; the second-stage reactor is connected with the first-stage reactor through a pipeline; the three-stage reactor is connected with the filtering device through a pipeline, the filtering device is connected with the mesoporous adsorption tower through a pipeline, the mesoporous adsorption tower is connected with the chelating resin tower through a pipeline, and the chelating resin tower is connected with the modified zeolite adsorption tower through a pipeline. The method has the advantages that equipment configuration is reasonable, and good stability and operability are achieved; the method provided by the invention has outstanding process route originality and low treatment cost, and realizes liquid phase treatment and high-valued cyclic utilization of the chemical high-salinity wastewater salt separation crystallization mother liquor.

The invention relates to a coal chemical strong brine treatment method and system, and the treatment method comprises the following steps: carrying out membrane filtration treatment on coal chemical strong brine to obtain filtrate; performing sodium sulfate crystallization treatment on the filtrate to obtain sodium sulfate crystals and first mother liquor; performing sodium chloride crystallization treatment on the first mother liquor to obtain sodium chloride crystals and second mother liquor; carrying out mixed salt crystallization treatment on the second mother solution to obtain a mixed salt crystal and a third mother solution; at least part of the third mother liquor is subjected to solvent removal treatment, and solid carnallite is obtained; and preparing the solid carnallite into the ceramsite filter material. According to the treatment method of the coal chemical strong brine in the embodiment, a method of sodium sulfate crystallization, sodium chloride crystallization and mixed salt crystallization is adopted, salt in the strong brine is separated to the maximum extent, and generated carnallite is prepared into a ceramsite filter material for use, so that the carnallite is harmless and recycled.

The present invention relates to a salt-resistant water treatment device and a salt-resistant method in a water treatment process. Conventional seawater, high-salt brine, etc. are treated by a photothermal absorber device to obtain freshwater resources. Solar energy is used as the sole energy source, and the absorbed solar energy is converted into thermal energy. A thin layer of water body is efficiently and locally heated to promote its rapid evaporation. The device can prevent device failure caused by salt crystallization, and is energy-saving and environmentally friendly without increasing environmental energy consumption.

The utility model discloses a high-recycling-rate industrial strong brine treatment system which comprises a homogenizing unit, a coagulating sedimentation unit, a water regeneration unit, a salt separation crystallization unit, a carnallite crystallization unit, a harmless treatment unit and a regenerated salt metering unit which are connected in sequence, the regenerated salt metering unit is also respectively connected with inlets of the homogenizing unit, the coagulating sedimentation unit, the water regeneration unit, the salt separation crystallization unit and the carnallite crystallization unit. According to the treatment system, the generated mixed salt is distributed to each treatment unit, so that the emission amount of chemical waste salt is reduced, the environmental influence of the waste salt is reduced, the industrial strong brine treatment system can be thoroughly and circularly operated, zero emission in a real sense is realized, and the treatment cost and the operation cost of the chemical waste salt are reduced.

The invention relates to the field of industrial wastewater treatment, in particular to a high-salinity wastewater salt separation and crystallization process and system.The process comprises the steps that hardness and silicon removal treatment, turbidity removal treatment, softening treatment, membrane treatment, ozone oxidation treatment, evaporation and concentration treatment and freezing crystallization treatment are conducted on wastewater, and mirabilite and freezing mother liquor are obtained; wherein the mirabilite is subjected to melt crystallization treatment to obtain a sodium sulfate product and a melt mother solution; the molten mother liquor is repeatedly subjected to melt crystallization treatment, and a sodium sulfate product is obtained; performing circulating sodium chloride crystallization treatment on the frozen mother liquor to obtain a sodium chloride product and sodium chloride mother liquor; the sodium chloride mother liquor is subjected to circulating carnallite crystallization treatment and drum drying, and a carnallite product is obtained. The process solves the problem of crystallization and salt separation of the coal chemical industry wastewater, and realizes cyclic utilization of the coal chemical industry wastewater, reduction of carnallite and resource cyclic economic utilization.

The invention provides an efficient buoyancy-driven convection type 3D solar evaporator which is used for removing salt and efficiently evaporating high-salinity water when the high-salinity water is stable at the same time. The invention combines different strategies, including capillary structures, low tortuosity large channels, and edge-first salt crystallization. With synergy of these strategies, the evaporator of the present invention exhibits a stable evaporation rate of at least 2.5 kgm <-2 > h <-1 > for seawater or saline solutions having a salinity of more than 10% by weight under 1 kWm <-2 > solar radiation.

The invention discloses an anti-crystallization overflowing regulating valve and a using method thereof, the anti-crystallization overflowing regulating valve comprises a valve body, the valve body is formed by splicing an input pipe and an output pipe, a ball valve wraps the joint of the input pipe and the output pipe, a valve handle capable of driving the ball valve to rotate is arranged on the ball valve, and a removing assembly used for removing crystals is arranged in the input pipe. By arranging the removing assembly, flow guide blades can be driven to rotate by means of impact force of waste water, a driven ring and a driven shaft which are connected with the flow guide blades can synchronously rotate at the first time, accordingly, arc-shaped cutters are driven to rotate to efficiently scrape and remove crystals on the inner wall of the input pipe, and the blocking problem caused by accumulation of the crystals is effectively prevented; and meanwhile, the first cutting edge and the second cutting edge of the arc-shaped cutter form a composite cutting angle, crystal substances attached to the inner wall of the input pipe are cut in two times, so that the resistance of the crystal substances to the arc-shaped cutter is reduced, and salt crystal substances attached to the pipe wall can be efficiently eradicated.

The invention discloses a preparation method of an efficient photo-thermal conversion black body membrane for solar seawater desalination, and relates to the technical field of solar seawater desalination. The preparation method comprises the following steps: (1) preparing a spinning solution; the preparation method comprises the following steps: dispersing a certain amount of polyacrylonitrile, zinc acetate, carbon nanotubes and carbon black in N-N dimethylformamide, and stirring to obtain a polyacrylonitrile / zinc acetate / carbon black / carbon nanotube mixed solution; and (2) spinning preparation. And spinning the spinning solution by using an electrostatic spinning device under a certain spinning condition to obtain the nanofiber membrane. And (3) growing the nanowire. The nanofiber membrane is subjected to heat treatment at a certain temperature, then the nanofiber membrane subjected to heat treatment is completely soaked in the growth solution, and hydrothermal growth is performed for enough time at a certain temperature. The efficient photo-thermal conversion nanofiber membrane is obtained. The high-efficiency photo-thermal conversion nanofiber membrane is prepared by combining an electrostatic spinning technology and a hydrothermal growth method, the solar energy absorption efficiency is high, the solar energy water evaporation rate is high, and surface salt crystals are few.

The invention discloses a historical and cultural block building structure reinforcing and repairing diagnosis system and method, and relates to the technical field of building repairing, and the method comprises the steps: employing a laser scanner to obtain building surface deformation data, synchronously starting a ground penetrating radar to detect the internal hollowing rate of a wall body and the compactness of mortar, a temperature and humidity sensor is embedded to collect environmental corrosion parameters, and a three-dimensional structure model fusing vibration and corrosion coupling characteristics is established; according to the three-dimensional structure model, a wall reinforcing module, a foundation reinforcing module and an anti-seismic reinforcing module are generated; constructing a dynamic material database containing the salt crystal growth rule of the lime-plastic layer, and calculating the compatibility parameters of the paper strip mortar ratio and the thermal expansion of the reinforced concrete member through a multi-scale stress matching algorithm; and typhoon and people flow coupling load simulation is carried out based on the restored three-dimensional structure model, a three-dimensional activation scheme is generated in combination with dynamic commercial streamline planning, and an environment response type monitoring network is deployed.

The invention provides a multi-level EC-ZP-ESi-P solar evaporator based on a bionic double-channel structure and a preparation method thereof.The solar evaporator comprises a photo-thermal conversion layer, a hydrophilic thermal insulation layer and a water conveying column, the photo-thermal conversion layer is arranged on the upper surface of the hydrophilic thermal insulation layer, and the upper end of the water conveying column is connected with the middle of the lower surface of the hydrophilic thermal insulation layer; the water conveying column conveys liquid below to the hydrophilic thermal insulation layer through the capillary action; the preparation method of the photo-thermal conversion layer EC-ZP porous carbon nanofiber membrane comprises the following steps: taking ZIF-8 particles and PAN as raw materials, carrying out electrostatic spinning, and then carrying out high-temperature carbonization; the preparation method of the hydrophilic heat-insulating layer ESi-P nanofiber membrane comprises the following steps: taking SiO2 nanoparticles and PAN as raw materials, and carrying out electrostatic spinning. The EC-ZP-coated ESi-P solar evaporator can effectively prevent salt crystallization from blocking a steam channel, solves the problem of performance degradation caused by salt crystallization in an existing solar evaporation device, improves the photo-thermal conversion efficiency and the water-heat cooperative management capability at the same time, and achieves efficient and sustainable seawater desalination.

The invention provides a method for preparing oriented porous hydrogel by using a salt crystallization template, which comprises the following steps of: mixing salt and hydrogel monomers, cooling to obtain a supersaturated salt hydrogel solution, placing a crystal nucleus template in the solution to guide nucleation and growth of salt crystals, and finally curing and cleaning the hydrogel to obtain the oriented porous hydrogel. The prepared hydrogel is anisotropic, highly ordered, controllable in pore structure size and high in biocompatibility. The preparation method has the characteristics of simple equipment, low cost, simplicity, convenience and easiness in operation, and the hydrogel can be selected from a wide variety of preparation materials and has a wide application prospect in the field of tissue engineering.

The invention discloses an interface evaporation seawater desalination device based on an armor Janus structure and a preparation method, and relates to the technical field of seawater desalination devices.The device comprises a black copper net frame and a carbon nano tube sponge, the carbon nano tube sponge is filled in the black copper net frame, the black copper net frame is made of a super-hydrophobic material, and the carbon nano tube sponge is filled in the black copper net frame. The carbon nanotube sponge is made of a super-hydrophilic material; the super-hydrophilic carbon nanotube sponge on the inner layer can quickly adsorb and transmit seawater by virtue of excellent hydrophilicity and a porous network structure, and a water micro-channel penetrating through the whole body is efficiently constructed; the super-hydrophobic black copper net on the outer layer is like a protective barrier, and the super-hydrophobic characteristic of the surface of the super-hydrophobic black copper net can remarkably reduce the adhesive force between seawater and the net surface, so that salt crystals possibly separated out in the evaporation process are difficult to adhere to the surface of the super-hydrophobic black copper net, and the problem of interface blockage caused by accumulation of the salt crystals is effectively avoided.

The invention discloses a preparation method of salt crystallization prevention aerogel with a vertical microchannel structure. The preparation method comprises the following steps: step 1, preparing a PPy-PDA composite photo-thermal material; step 2, preparing a PVA / HPC solution; step 3, preparation of a PVA / HPC coated PPy-PDA precursor solution; and step 4, preparing the PVA / HPC coated PPy-PDA composite aerogel with the vertical micro-channel structure. The salt crystallization prevention aerogel with a vertical micro-channel structure is prepared by utilizing a directional freezing and chemical cross-linking technology, the salt crystallization prevention aerogel has excellent photo-thermal response capability and energy conversion efficiency, and the vertically arranged micro-channel structure can promote rapid directional transportation of moisture and salt ions and inhibit salt accumulation and crystallization; meanwhile, the chemical crosslinking strategy enhances the mechanical stability and durability of the gel network. The preparation process is controllable, and the material is green and environment-friendly and can be applied to the field of solar interface evaporation desalination of high-salinity wastewater.

The present invention discloses a near-zero discharge system and method for high-salt and high-concentration organic industrial wastewater, which includes a freezing crystallization system, a fine crystal clarification and separation system, a nanofiltration salt separation system, a sodium chloride evaporation crystallization system, a sodium sulfate evaporation crystallization system, a mixed salt crystallization system, a hot melt system, and a miscellaneous salt drying system. Through the process of the present invention, most of the sulfate in the water is first precipitated in the form of thenardite decahydrate. As the temperature rises or the fine crystals are reversely dissolved, the sulfate content in the lean nitrate solution is increased, which increases the difficulty of operating the sodium chloride evaporation crystallization system. By rotary immersion ultrafiltration, the thenardite decahydrate can be effectively separated, and a large amount of pre-ultrafiltration pretreatment can be omitted; the water produced by the rotary immersion ultrafiltration enters the nanofiltration system, which can increase the mass ratio of sodium chloride: sodium sulfate in the lean nitrate solution to more than 100; the mixed salt after crystallization is re-salted by hot melting, which greatly reduces the output of miscellaneous salts.

The application provides a concentrated brine interface evaporation device for anti-salt crystallization, comprising a photothermal evaporation unit, the photothermal evaporation unit comprises a hydrophilic hollow porous tube and a photothermal material layer coated on the outside of the hydrophilic hollow porous tube, the hollow axial direction and the diameter direction of the hydrophilic hollow porous tube form a three-dimensional multi-directional evaporation channel, on the one hand, the photothermal evaporation rate is improved, on the other hand, the salt ions in the photothermal material layer are quickly exchanged through the convection effect, and then flow into the inner layer low-concentration water, so that the photothermal layer is prevented from appearing salt crystallization. The inner layer and the peripheral wall of the hydrophilic hollow porous tube are formed with a porous structure through the hydrophilic hollow porous tube, the convection effect of the liquid in the hollow tube is enhanced, the evaporation amount of the device is evenly distributed to the surrounding through the three-dimensional structure design, the concentration of the evaporation surface is prevented from being too high, and the synergistic effect makes the device effectively inhibit the crystallization of salt in the device during the evaporation process.