90 results about "Brackish water" patented technology

The invention relates to the technical field of agricultural engineering and ecological environment protection, in particular to a saline-alkali soil desalination improvement system and method based on brackish water recycling. The system comprises a data collection module which collects soil salinity data, meteorological data and crop growth data of the saline-alkali land in real time; the data processing and analyzing module is used for receiving and preprocessing the soil salinity data, the meteorological data and the crop growth data of the saline-alkali land, constructing a soil salinity prediction model and outputting a soil salinity prediction result; the irrigation strategy decision module is used for generating an optimal irrigation strategy by adopting a reinforcement learning algorithm according to the soil salinity prediction result and the preprocessed crop growth data; and the irrigation control system is used for performing brackish water irrigation operation on the saline-alkali soil according to the optimal irrigation strategy. Precise regulation and control of saline-alkali soil salinity can be achieved, brackish water is adopted as irrigation water, water resources are saved to a certain degree, and therefore the improvement cost of saline-alkali soil is reduced.

The invention discloses a high-water-permeability anti-pollution reverse osmosis membrane and a preparation method thereof, and belongs to the technical field of water treatment membranes. The reverse osmosis membrane comprises a porous support layer, a polyamide separation layer and a composite anti-pollution functional layer, and the composite anti-pollution functional layer is composed of a polyvinyl alcohol matrix and a nanoscale water channel material uniformly dispersed in the polyvinyl alcohol matrix. Comprising the steps of coating liquid preparation, base membrane pretreatment, composite functional layer construction, cross-linking and curing, a rapid transmission path is provided for water molecules by introducing a nanoscale water channel material, the water flux of the reverse osmosis membrane is greatly improved on the premise that the excellent pollution resistance of a PVA coating and the high selectivity of the membrane are kept, and the service life of the reverse osmosis membrane is prolonged. The technical problem that the membrane flux is severely reduced due to a traditional PVA coating is solved, and the method has wide application prospects in the fields of seawater desalination, brackish water desalination, ultrapure water preparation, wastewater reuse and the like.

The invention belongs to the field of water resource purification, and particularly relates to preparation and application of a solar photo-thermal water evaporation material with ammonia resistance and salt resistance. The evaporation material comprises a porous substrate material, polyelectrolyte hydrogel loaded in the substrate material and a photo-thermal material, and the difunctional solar evaporation material with ammonia nitrogen interception and salt resistance is obtained by polymerizing different types of polyelectrolyte hydrogel and photo-thermal material on the inner and outer surfaces of the substrate in situ. The prepared polyelectrolyte hydrogel evaporation material not only can utilize solar photo-thermal efficient evaporation to produce water, but also can utilize charged groups of the polyelectrolyte hydrogel to generate Donnan repulsive interaction on ammonia nitrogen and salt ions, has ammonia nitrogen interception and salt resistance functions, and is suitable for purifying seawater and brackish water polluted by ammonia nitrogen.

To provide a stainless steel with superior pitting resistance in natural fresh water and brackish water environments where the natural potential repeatedly fluctuates between a noble potential (high potential) and a negative potential (low potential).SOLUTION: A stainless steel comprises, in mass%, C: over 0.018 and 0.30% or less, Si: 0.01 to 4.00%, Mn: 0.01 to 3.00%, P: 0.001 to 0.05%, S: 0.0001 to 0.01%, Cr: 9 to 23%, Ni: 0.001% or more and less than 2.0%, Cu: 0.001 to 1.5%, Mo: 0.001 to 1.5%, Sn: 0.001 to 0.300%, Al: over 0.03 and 4.00% or less, N: 0.001 to 0.100%, and O: 0.0001 to 0.01%, and further comprises, in mass%, one or two or more selected from Zr: 0.001 to 0.1%, V: 0.001 to 0.2%, W: 0.001 to 0.1%, Ta: 0.001 to 0.1%, and Hf: 0.001 to 0.1%.SELECTED DRAWING: None

The application discloses a method for monitoring and controlling corrosion environment of an underwater concrete structure in a brackish water area, and the method comprises the following steps: laying a monitoring system, monitoring the concentration of chloride ions, analyzing data of the distribution of the concentration of chloride ions, dividing the area according to the concentration of chloride ions, adjusting an impressed current, and giving a warning of the corrosion environment; the brackish water area is divided into a constant saltwater area, a constant freshwater area and a brackish water interface change area by continuously collecting data of the concentration of chloride ions and constructing a concentration field and a gradient field model, so that the risk degree of the corrosion environment can be directly reflected, and the cathodic protection parameters can be dynamically adjusted according to the real-time corrected chloride ion concentration field model, thereby realizing the intelligent monitoring, early warning and control of the corrosion environment of the underwater concrete structure in the brackish water area.

The application discloses a kind of high-activity mysis of macrobrachium rosenbergii screening method, belong to aquaculture technical field.The method includes: pre-treatment of immersion washing, using 100 mesh nylon net to catch I stage mysis, stirring treatment in the first immersion washing container containing 100ppm formaldehyde and 6 ‰ brackish water;First light source induction screening, using 580-595nm, 1500-2000lux LED light source induction above second immersion washing container, and high-activity I stage larvae that float up are collected in batches;Disinfection treatment, after soaking with 20-30ppm povidone iodine, rinse;Again light source induction screening, after the larvae are developed into II stage after constant temperature cultivation at 28-30 DEG C for 24 hours, again light source induction is carried out and high-activity II stage larvae that float up are collected in batches;Finally, concentrated cultivation is carried out.The application realizes the high-efficiency, standardization sorting of high-activity mysis by the combination of specific wavelength light source induction and twice screening before and after key development period, and optimizes immersion washing, disinfection and cultivation parameters, significantly improves the quality of seedling and the survival rate of seedling.

The utility model discloses a kind of silica-containing wastewater recycling system, including the first sedimentation tank, primary CTUF silicon removal pool, primary RO water treatment system, secondary RO water treatment system, second sedimentation tank, secondary CTUF silicon removal pool, tertiary RO water treatment system, MVR system connected in sequence;Primary RO water treatment system is equipped with brackish water film, secondary RO water treatment system is equipped with seawater desalination film, and STRO film is equipped in tertiary RO water treatment system;Primary CTUF silicon removal pool, secondary CTUF silicon removal pool are equipped with roll type ultrafiltration membrane in both;The MVR system is used to evaporate concentration to the concentrated water discharged by tertiary RO water treatment system, and primary RO water treatment system, secondary RO water treatment system, tertiary RO water treatment system, MVR system are also connected with recycling water tank.The utility model is treated to wastewater by multistage precipitation, CTUF silicon removal pool, RO system, effectively removes higher concentration of silicon in wastewater, realizes wastewater recycling.

The application discloses a membrane-free liquid flow battery desalination device and method based on gravity stratification. The device comprises an upper-layer reduction reaction chamber, a middle-layer desalination chamber and a lower-layer oxidation reaction chamber. A stable three-layer liquid area is formed by using the density difference and the oil-water insolubility to replace the ion exchange membrane with the oil-water interface. The lower layer is an anode electrolyte with a density greater than water, the upper layer is a cathode electrolyte with a density less than water, and the middle layer is brine to be desalinated. After a voltage is applied, the oxidation-reduction reaction drives the migration of cations to the upper layer and the migration of anions to the lower layer, thereby realizing efficient desalination of brine. The application is membrane-free, low-cost, high-efficiency and stable in operation, and is suitable for scenes such as seawater desalination, brackish water desalination and high-salt wastewater treatment.

The invention relates to the field of monitoring and early warning, in particular to a concrete member erosion damage early warning method influenced by multiple factors in a salt and fresh water area. Comprising the following steps: collecting environmental parameters of a concrete member in a salt-fresh water intersection area through a sensor network, constructing a corrosion data matrix, extracting a disturbance factor characteristic spectrum by adopting a tensor column block decomposition algorithm, and constructing a corrosion evolution trajectory model based on a heterogeneous graph neural network. A dynamic Bayesian network and Monte Carlo simulation are combined to predict a multi-stage corrosion risk, short-term, medium-term and long-term early warning indexes are generated, finally, graded alarm and protection strategy generation are realized through a fuzzy logic mechanism, and intelligent sensing, modeling and prediction of a corrosion process are realized. According to the method, intelligent sensing, modeling and prediction of the erosion process of the concrete member are realized, and the timeliness, accuracy and interpretability of erosion early warning of the concrete member are remarkably improved.

The invention discloses a carbon material with a through hole structure and a preparation method and application thereof, the preparation method comprises the following steps: S1, selecting a plurality of aquatic plant stalks with the moisture content of 10% or above, and then compressing the plurality of stalks under 5-50MPa to obtain compressed stalks; s2, the compressed stalks obtained in the step S1 are carbonized at the temperature of 600-800 DEG C to obtain carbonized stalks, and then the whole surfaces of the carbonized stalks are subjected to hydrophilic modification treatment to obtain the carbon material. Through combination of compression, carbonization and hydrophilic modification treatment, the integrity of a plant original through hole structure is reserved to the maximum extent, the pore size is optimized, the capillary effect is enhanced so as to efficiently complete water evaporation, and the evaporation efficiency of the carbon material prepared by the preparation method can reach 4.8 kg / (m.h). And seawater, brackish water, high-fluorine water, heavy metal organic pollution wastewater and eutrophic water can be efficiently treated.

The application discloses a distributed brackish water resource utilization system, comprising: a water taking device, wherein the water takers of the water taking device are distributed in different water body areas and / or different areas of the same water body; a water treatment device integrated in a movable transfer equipment and connected with each water taking device through a pipeline; the water treatment device adjusts water treatment parameters based on the water inlet salinity and the target water outlet salinity; wherein the target water outlet salinity is lower than the salt tolerance threshold of the target irrigation crops, and the difference between the two is maintained within a set range; the water treatment device is also used for outputting the treated water to the target irrigation area with the target irrigation crops, or connecting with a drip irrigation system arranged in the target irrigation area; and a control device is in communication connection with the water treatment device and used for adjusting the water treatment parameters of the water treatment device. The distributed brackish water resource can be efficiently and flexibly utilized.

The utility model relates to the technical field of water circulation conveying equipment, and discloses a light salt brine circulation conveying device capable of reducing pipeline salty mud sediment, which comprises a conveying groove, tracks are respectively and fixedly arranged on the front side and the rear side of an inner cavity of the conveying groove, magnets with opposite magnetic poles are sequentially laid in the tracks, and electromagnetic sliding blocks are movably connected to the tracks. A cleaning plate is fixedly installed between the two electromagnetic sliding blocks and located over the bottom of an inner cavity of the conveying groove, the left portion of the inner cavity of the conveying groove is fixedly sleeved with a water inlet pipe, the middle of the water inlet pipe is fixedly sleeved with a pump, the bottom of the inner cavity of the conveying groove is fixedly sleeved with a blow-off pipe, and the middle of the blow-off pipe is fixedly sleeved with a valve. The electromagnetic sliding block slides on the rail, so that the cleaning plate is driven to scrape sediments at the bottom of the inner cavity of the conveying groove, blockage caused by accumulation of a large amount of salty mud is avoided, corrosion of the salty mud to the device is reduced, stable operation of the device is maintained, and the device keeps good working efficiency.

The embodiment of the invention provides a comprehensive treatment system for saline-alkali soil, and relates to the technical field of agriculture, and the comprehensive treatment system comprises a water source collection system for collecting rainwater and shallow brackish water; the water source treatment and storage system is used for carrying out purification and desalination treatment on the rainwater and the shallow brackish water collected by the water source collection system, and storing the treated fresh water in a storage pool; the intelligent irrigation system is used for irrigating the saline-alkali soil by using the fresh water stored in the storage pool when detecting that the pore water conductivity of the saline-alkali soil exceeds a preset threshold value, and washing salt accumulated on the surface layer of the saline-alkali soil by using salt washing mixed water; the salt washing mixed water is mixed water of rainwater collected by the water source collecting system and shallow brackish water. By applying the embodiment of the invention, the vicious circle problem of'water shortage-salt accumulation-low yield 'in the saline-alkali soil can be overcome, and the ecology of the saline-alkali soil is improved.

The invention discloses a preparation method and application of an agricultural modified humic acid-polyferric compound fertilizer for realizing high salt water content, and belongs to the technical field of agricultural resources and environment. The method mainly aims at solving the problem of utilization of high-salinity water such as brackish water and seawater which cannot be used for farmland irrigation due to over-high salinity or salinity. The method mainly comprises the following steps: firstly, dissolving humic acid in a KOH solution, adjusting the pH value, and catalyzing by using laccase to prepare a high-activity modified humic acid solution; then, adding a polyferric compound (such as polyferric phosphate) into the solution, reacting and drying to obtain a modified humic acid-polyferric compound fertilizer; and finally, adding the solid fertilizer into high-salinity water (such as brackish water and seawater), stirring, standing and filtering to obtain liquid, namely the irrigation nutritive water, which can be directly used for agricultural application such as irrigation, water culture and the like, so that'desalination and detoxification 'and'nutrition' are completed in one step.

The invention belongs to the technical field of photo-thermal conversion and solar seawater desalination, and particularly relates to a flower-on-ball photo-thermal evaporation material, a preparation method of the flower-on-ball photo-thermal evaporation material and a photo-thermal evaporation device of a honeycomb-shaped hollow structure. The photothermal evaporation device of the honeycomb-shaped hollow structure comprises a base and an evaporation assembly fixed to the base, the evaporation assembly comprises an internal T-shaped evaporation body and an external cylindrical wrapping part, and the T-shaped evaporation body and / or the cylindrical wrapping part are / is made of photothermal evaporation materials. The whole device is made of photo-thermal evaporation materials and PVA-PAM composite aerogel, the upper portion of a T-shaped main body is a honeycomb-shaped disc evaporation layer, the lower portion of the T-shaped main body is a water supply column, an outer cylinder and the water supply column form a hollow cavity, and salt is discharged through a T-shaped path. The device optimizes heat management, improves the water evaporation rate and the long-term stability of seawater desalination through material and structure collaboration, and is suitable for solar seawater desalination and brackish water desalination.

The invention belongs to the technical field of iodine removal of light salt brine, and particularly relates to a method for removing high-valence iodine in ionic membrane caustic soda light salt brine. Comprising the following steps: (1) adding a pH regulator and sodium sulfite into light salt brine, regulating the pH to 1-3, stirring until the reaction is completed, and carrying out primary adsorption deiodination by adopting a composite adsorbent to obtain light salt brine 1; and (2) adding a pH regulator and hydrogen peroxide into the light salt brine 1, regulating the pH value to 1-2, stirring until the reaction is completed, and carrying out secondary adsorption by adopting a composite adsorbent to remove iodine, thereby obtaining the deiodinated light salt brine. According to the removal method disclosed by the invention, high-valence iodine such as periodate and iodate in the light salt brine is converted into low-valence iodine such as iodate and iodide ions by utilizing the reducibility of sodium sulfite and the oxidation-reduction property of hydrogen peroxide in the coexistence of iodide ions and iodate, and then is further converted into simple substance iodine, and the simple substance iodine is efficiently removed by utilizing a composite adsorbent; the process is simple, the cost is low, the removal rate is high, and the removal effect is good.

The application relates to a kind of unpowered brackish water desalination device, it includes transparent evaporation tank, water collecting pool, transparent evaporation tank bottom lays iron powder and carbon powder, the upper portion of transparent evaporation tank is provided with multiple layers of grid plate, each layer of grid plate is formed by multiple strip-shaped plates side by side, two adjacent strip-shaped plates are arranged at intervals, the interval between two adjacent strip-shaped plates in the same layer is evaporation channel, each strip-shaped plate is provided with groove along the length direction, black sponge is placed in the groove, a plurality of fixing holes are arranged in the groove bottom, one capillary tube is fixed in each fixing hole, the upper end of the capillary tube is communicated with the groove, and the lower end of the capillary tube is close to iron powder and carbon powder;Several water intercepting strips are arranged above the uppermost grid plate in an inclined manner, the water intercepting strips are arranged staggered in height, the lower part of the water intercepting strips is inserted into the water outlet hole, and the water outlet hole is a strip-shaped hole;The water inlet of transparent evaporation tank is arranged below the lowermost grid plate;Transparent evaporation tank is also provided with a vent hole.The application is used for treating brackish water.

A fire hazard due to Santa Ana winds is mitigated by causing the winds to flow through an evaporative barrier proximate an entrance to a canyon, thereby cooling, humidifying, and slowing the winds. Water applied to the barrier can be drawn by a pump from an underlying aquifer. Power for the pump can be provided by a windmill positioned in the path of the winds, and / or by solar panels. A mat containing seeds and / or seedlings and super absorbent polymer (SAP) can be positioned upwind or downwind of the evaporative barrier, and water can be applied to the mat, causing the winds to pass through the resulting vegetation, thereby further slowing and humidifying the winds. A thermally conductive network can cool the mat by conducting heat from the mat to the evaporative barrier. Brackish water can be directed to a desalination apparatus, and thence as fresh water to the mat.

The invention provides a low-salt-content brackish water concentration system and a low-salt-content brackish water concentration method. The low-salt-content brackish water concentration system comprises a fresh water tank, a concentrated water tank, a first water treatment device, a second water treatment device, an energy recovery device and a return pipeline, wherein an inlet of the second water treatment device is connected with a concentrated water outlet of the first water treatment device through a second pipeline; the pressure of concentrated water discharged from the concentrated water outlet of the second water treatment device is greater than that of concentrated water discharged from the concentrated water outlet of the first water treatment device; a high-pressure water outlet of the energy recovery device is connected with an inlet of the first water treatment device, and a high-pressure water inlet of the energy recovery device is connected with a concentrated water outlet of the second water treatment device through a fifth pipeline; an inlet of the return pipeline is communicated with a concentrated water outlet of the second water treatment device, and an outlet of the return pipeline is communicated with the fourth pipeline. Therefore, the low-salt-content brackish water concentration system disclosed by the invention is low in energy consumption and high in fresh water recovery rate.

The present application relates to the technical field of mixing equipment, and discloses a brackish water desalination mixing irrigation device, which comprises a mixing box body, a liquid discharge box body arranged on the mixing box body, a fresh water cavity and a salt water cavity formed in the liquid discharge box body, two communication pipes arranged between the mixing box body and the liquid discharge box body and respectively communicated with the fresh water cavity and the salt water cavity, and a liquid discharge component arranged on the liquid discharge box body and capable of intermittently discharging the liquid stored in the fresh water cavity and the salt water cavity, and capable of quantitatively discharging the liquid in the two cavities so that the two kinds of liquid are released in the mixing box body in a more suitable proportion, thereby facilitating subsequent mixing and stirring of the two kinds of liquid. After the brackish water is mixed with a certain proportion of fresh water, when the irrigation water quality reaches a suitable standard, the irrigation amount can be adjusted according to the soil and crop requirements, the crops can be irrigated, and the growth of the crops is facilitated.

This invention discloses a saline water desalination system combining a hemispherical solar distiller with underground soil condensation. The system comprises a saline water storage device 1, an evaporation device 2, a condensation device 3, and a freshwater collection device 4. The saline water storage device 1 provides the saline water source for the entire system. The evaporation device 2 utilizes saline water pumped by a water pump 11 for natural evaporation. A centrifugal fan 32 promptly transports the generated water vapor to the underground condensation device 3 via an insulated pipe 31, where it exchanges heat with the soil underground. Finally, the generated freshwater is collected in the freshwater collection device 4. This system eliminates the traditional method of collecting desalinated water where the evaporation and condensation processes occur in the same space. It proposes a method that physically isolates the evaporation and condensation processes of saline water under the influence of solar energy, solving the problem of a significant decrease in condensation efficiency as evaporation and condensation continue in the same space.

The invention relates to the technical field of energy conservation and environmental protection, and particularly discloses a scale inhibition and dispersion agent for a reverse osmosis membrane and a preparation method and application of the scale inhibition and dispersion agent. The scale inhibitor for the reverse osmosis membrane, provided by the invention, is obtained by carrying out dehydration condensation reaction on polysuccinimide, carboxylated chitosan and sulfamic acid. The scale inhibition and dispersion agent is suitable for reverse osmosis treatment systems of various water qualities such as municipal wastewater, seawater, brackish water, surface water, underground water and industrial wastewater. Experiments show that the product has excellent scale inhibition performance, the scale inhibition rate can reach 97.4% or above, dirt deposition on the surface of the membrane can be remarkably inhibited, and the service life of the membrane is prolonged. Meanwhile, the preparation process is simple and convenient, the raw material cost is lower, the use is safe and efficient, the biodegradability is good, the influence on the environment is reduced while the stable operation of a reverse osmosis system is ensured, and the popularization and application prospects are good.

The greenhouse brackish water desalination irrigation system coupled with membrane distillation and humidification-dehumidification technology belongs to the field of rural agricultural water resources utilization. The system couples membrane distillation and humidification-dehumidification technology to improve the efficiency of brackish water desalination and regulate the microenvironment in the greenhouse; solar energy is used to heat the underground brackish water to drive the membrane distillation subsystem to utilize brackish water desalination for agricultural irrigation. The high-temperature brackish water with residual heat and low-temperature fresh water discharged from the membrane distillation subsystem are introduced into the wet curtain and condenser in the greenhouse, and the brackish water is desalinated by the humidification-dehumidification technology to improve the utilization rate, and the high-temperature brackish water introduced into the wet curtain is used to heat the low-temperature air, which helps the greenhouse to maintain an environment suitable for crop growth in winter. A regenerator is provided in the system to preheat the underground brackish water with the brackish water discharged from the membrane distillation subsystem with residual heat, which reduces the installation area of the solar collector and the cost of the system.

The present invention relates to a method for modifying a reverse osmosis thin-film composite (TFC) membrane, the polyamide active layer of which is modified by incorporating polyamine groups, polyphosphonic groups and copper nanoparticles / ions via a chemical modification process. This modified composite membrane exhibits high biofouling resistance, which makes it suitable for use in seawater and brackish water desalination.

A novel reverse osmosis or nanofiltration (RO / NF) system is developed that utilizes a uniquely configured membrane permeate flow path within the system to detect and respond to the onset of fouling, generating time-sensitive data. Membrane performance data under real-time operating conditions is then used to rapidly detect membrane fouling, fouling rate, and fouling causes. Subsequently, controller-based system-generated actions are employed to stop fouling and recover from or slow it down. Furthermore, operator intervention steps are anticipated, planned, and scheduled, if necessary, to restore optimal system operating conditions. The end result is a novel, energy-efficient, and advanced (machine learning) reverse osmosis system for brackish water desalination and fouling management.

The invention relates to the technical field of irrigation, and discloses a coastal wetland plant maintenance system and method.The method comprises the steps that firstly, concentration spatial distribution of thiosulfate and tetrathiosulfate in a root domain is obtained, the spatial position and the peak shape curvature of a concentration ratio peak are determined based on the concentration spatial distribution, and meanwhile the outer edge spatial position of a root surface iron plaque is determined; calculating position deviation and curvature deviation between the two; further measuring the root domain volume and the ion strength and sulfate radical concentration of pore water; then, a small amount of fresh water and brackish water are injected into the root domain, the spatial position of a concentration ratio peak and the change rate of curvature are observed, and the hydrochemistry and root domain reaction relation is established; according to the deviation and the change rate, the required ion strength and the sulfate radical concentration adjustment amount are solved, the volume of fresh water and the volume of brackish water required by single-time maintenance are accurately converted according to the root domain volume and the ion characteristics of different water sources, and therefore scientific regulation and control over the coastal wetland plant root domain environment are achieved.

The invention discloses a rapid evaluation, regulation and control method for riparian zone fresh water lenticular expansion and salt water extraction considering multiple types of boundary conditions, and the method comprises the steps: obtaining hydrogeological parameters of a riparian zone aquifer, and carrying out the generalization of the hydrogeological parameters into different working conditions; based on the Dupuit assumption and the potential energy superposition principle, a total potential energy analytic function for describing underground water flowing in the aquifer is established, and at the moment, according to the known water pumping amount, fresh water lenticular body interface distribution under the corresponding working condition is solved; on the basis of the total potential energy analytic function, the stagnation point position xs in the flow field is calculated, and the sustainable salt water exploitation rate Qm under the corresponding physical model is solved according to the critical condition that the salt water and fresh water interface tip xL coincides with the stagnation point; a dispersion correction coefficient is introduced to correct the sustainable saline water exploitation rate Qm; and according to the corrected sustainable saline water exploitation rate Qm, the operation frequency of the field pumping well is regulated and controlled in real time. According to the method, the sustainable saline water exploitation rate can be rapidly determined, and real-time operation regulation and control of the on-site pumping well can be guided.

The invention discloses a method for irrigating a wild jujube ecological economic forest in an extremely arid flowing desert area by using underground brackish water, and relates to the technical field of desertification control and ecological restoration. According to the method, through the steps of land pretreatment, herbaceous plant sowing and management, wild jujube sowing, field management and the like, the ecological economic wild jujube forest is successfully constructed in the extreme drought flowing desert area, especially in the area where fresh water resources are deficient but the salinity (M) is larger than or equal to 5g / L and underground brackish water resources are rich in reserves; the near-surface wind speed can be reduced by more than 50%, and sand burying can be resisted; the survival rate of the wild jujube under the irrigation of brackish water with M greater than or equal to 5g / L can be increased to 85% or above; herbaceous income can be obtained in a short period, a deep processing industry chain is extended based on wild jujube for a long period, and forest cultivation by forest is realized; meanwhile, vegetation coverage is increased, desertification is restrained, and desert land is promoted to be transformed into ecologicalization and economization from wasteful transformation; and a sustainable and developable economic mode is realized.

The invention discloses a nondestructive acquisition method for the carbonization depth of a concrete structure under a dry-wet cycle condition in a salt-fresh water area, and the method comprises the steps: collecting the carbonization depth influence data and ultrasonic detection data of the concrete structure through arranging various types of sensors, and forming an initial data set; preprocessing the initial data set, performing data compensation on the non-uniform carbonization region, generating a pore structure-carbonization depth joint feature, and outputting a carbonization feature recognition set based on the joint feature; a concrete structure carbonization diffusion path is obtained according to the carbonization feature recognition set, a carbonization degree evaluation map is generated, a carbonization expansion space is obtained, and a concrete structure safety service set is generated according to the carbonization expansion space; and in combination with the safe service set and the carbonization depth influence data, determining a carbonization acceleration trend, and outputting a concrete structure carbonization depth record according to the carbonization acceleration trend. Various factors influencing concrete carbonization are comprehensively considered, and lossless acquisition of the carbonization depth of the concrete structure under the dry-wet cycle condition in the salt-fresh water area is realized.

The invention relates to a brine desalination and collection device which comprises a heating water tank and a condensation water tank which are connected through a steam channel. The heating water tank is provided with a water injection port used for injecting saline water, and a heating unit is arranged in the heating water tank. The heating unit is wrapped with an elastic soft balloon, and heat conduction oil is injected into the soft balloon. In the device, the heating unit is not in direct contact with saline water, but carries out heat conduction through the heat conduction oil and the soft balloon. The indirect heating mode can effectively avoid scaling on the surface of the heating element, meanwhile, due to the elasticity of the soft balloon and the flowability of the heat conduction oil, salt crystals attached to the surface of the balloon can be broken and fall off along with expansion caused by heat and contraction caused by cold of the soft balloon, and automatic removal of the crystallized salt of the soft balloon is achieved.