759 results about "Fresh water" patented technology

The invention provides a reservoir pressure salinity scheduling method based on a physical information neural network (PINN). The reservoir pressure salinity scheduling method comprises the following steps: Step 1, salinity prediction based on a physical information neural network (PINN) model; the method comprises the following steps: in a PINN model framework, embedding a physical law of salinity conservation into a multi-layer perceptron (MLP) artificial neural network for training so as to carry out salinity prediction; step 2, establishing an estuary water-salt model based on a three-dimensional ocean numerical FVCOM model; step 3, carrying out upstream reservoir salty water pressing and light water supplementing emergency scheduling based on salinity forecast; comprising the following steps: Step3.1, establishing a multi-objective function; and Step3.2, solving a scheduling model. According to the method, the salinity momentum conservation constraint can be considered, the salinity prediction accuracy under the influence of different upstream flows and downstream tidal ranges can be improved, and the emergency scheduling of the reservoir for the salt tide invasion of the estuary drinking water source can be carried out in combination with the scheduling model, so that the water supply safety is ensured.

A leaching and desalinating system for sandy soil in estuarine land reclaimed by sand blowing before planting greenery is provided. The leaching and desalinating system comprises a water pump and pipe assembly, a freshwater storage tank and a main diverting and draining channel. The water pump and pipe assembly lifts freshwater from a river to the freshwater storage tank through a water delivery pipe, multiple infiltration parts in which greenery is planted are provided on the waterside slope, the infiltration parts are connected to each other via multiple drainage infiltration channels. The present disclosure can quickly desalinate the sandy soil in land reclaimed by sand blowing at a low cost, improve the physicochemical properties of the soil, and provide a basic guarantee for the subsequent greenery planting on the sandy soil in land reclaimed by sand blowing.

The invention discloses a hydrogel-based water-energy-resource co-production solar evaporator and application thereof, and belongs to the technical field of chemistry and environment, the hydrogel-based water-energy-resource co-production solar evaporator is prepared by taking sodium alginate hydrogel as a matrix, adding carbon nanotubes and a titanium-based lithium ion sieve or a metal-doped titanium-based lithium ion sieve into a solution of the sodium alginate hydrogel, taking polyurethane sponge as a carrier frame, and preparing the hydrogel-based water-energy-resource co-production solar evaporator. Ca2 + is adopted as a cross-linking agent to construct a solar evaporator with a flexible size (centimeter-level to meter-level components can be prepared according to application scenes), the solar evaporator is used for the solar driven evaporation process of lithium-containing water resources such as salt lake seawater, and Li + selective enrichment, fresh water collection and waste heat power generation are synchronously achieved. Moreover, the evaporator has the characteristics of simple preparation process, low cost and excellent environmental compatibility, also has a good removal effect on salt ions, and keeps stable fresh water collection performance in a long-time operation process.

The invention belongs to the technical field of drilling fluid processing, and particularly relates to a special silicate water-based drilling fluid for a coal-bed gas well as well as a processing method and a processing device of the special silicate water-based drilling fluid. The top end of the stirring tank is communicated with a first feeding hole and a second feeding hole, and the bottom end of the stirring tank is communicated with a discharging pipe; a rotating shaft is rotationally connected to the top surface of the inner wall of the stirring tank, and a sliding groove is formed in the bottom surface of the rotating shaft; a rotating shaft is driven by a first motor to rotate, and the rotating shaft drives a connecting shaft to rotate, so that fresh water and additives in a stirring tank are stirred and mixed by stirring blades, and a first screw rod can be driven by the first motor to positively and negatively rotate in a reciprocating manner in the mixing process; the first screw rod drives the connecting shaft to move up and down in the sliding groove, so that the stirring blades move up and down, the stirring blades stir and mix the water and the additive while moving, and the mixing efficiency and uniformity of the additive and the water are improved.

The invention discloses a non-selective membrane mixing system for solar seawater desalination and all-weather salinity difference energy collection. The non-selective membrane mixing system comprises a chamber for accommodating seawater; the salinity gradient energy power generation module is arranged at the bottom of the chamber and comprises a cation electrode and an anion electrode which are connected through an external circuit, and the cation electrode and the anion electrode are immersed in the seawater in the chamber; the salinity gradient energy generation module comprises an evaporator and a condensation cover, the evaporator floats in the seawater in the cavity, and the condensation cover is located at the top of the cavity; wherein no ion selective membrane is arranged between the cation electrode and the anion electrode. According to the system, photo-thermal evaporation fresh water production and salinity gradient energy power generation / energy storage processes are coupled, and membrane-free all-weather salinity gradient energy collection is realized.

The utility model provides a system for directly recycling wastewater of a medium-high pressure boiler. The system comprises a collecting and regulating tank, a heat exchanger, a coagulation clarifier, a multi-medium filter, an ultrafiltration system, a secondary reverse osmosis system, an EDI (Electronic Data Interchange) device, a mixed bed and a user high-purity water tank which are connected in sequence, the second-stage reverse osmosis system comprises a first-stage reverse osmosis system and a second-stage reverse osmosis system, the first-stage reverse osmosis system comprises a first-stage RO raw water tank, a precision filter and a first-stage RO device, effluent of the ultrafiltration system enters the first-stage RO raw water tank and then enters the precision filter to be filtered, and water produced by the precision filter is fed into the first-stage RO device; the second-stage reverse osmosis system comprises a second-stage RO raw water tank and a second-stage RO device, fresh water produced by the first-stage RO device is fed into the second-stage RO raw water tank and then enters the second-stage RO device, and fresh water produced by the second-stage RO device is fed into the EDI device to be treated. According to the utility model, a full-flow treatment system is developed aiming at the water quality condition of the wastewater of the medium-high pressure boiler, and the finished water can stably meet the water supply requirements of the medium-high pressure boiler.

According to the system, a PEM electrolytic hydrogen production subsystem electrolyzes fresh water through renewable energy source electric power to produce high-pressure hydrogen and oxygen, and a first strand of medium-low temperature waste heat is generated; the methanol synthesis subsystem synthesizes a green methanol product and generates a second stream of medium and low temperature waste heat; the nanofiltration-reverse osmosis combined seawater desalination subsystem is connected with the PEM electrolytic hydrogen production subsystem, the nanofiltration-reverse osmosis combined seawater desalination subsystem performs seawater pretreatment, nanofiltration desalination softening and reverse osmosis deep desalination to generate fresh water, and the fresh water is buffered by a fresh water storage tank and then is fed back to the PEM electrolytic hydrogen production subsystem to form a fresh water closed loop; the heat recovery loop is used for preheating a seawater feed entering the nanofiltration-reverse osmosis combined seawater desalination subsystem by using the first medium-low temperature waste heat from the PEM electrolytic hydrogen production subsystem and / or the second medium-low temperature waste heat from the methanol synthesis subsystem, so that the viscosity of the seawater feed is reduced, and the membrane flux is improved or the operation pressure is reduced.

The invention discloses a mine ecological restoration effect evaluation method based on a life cycle evaluation model, and relates to the technical field of ecological restoration effect evaluation, and the method comprises the steps: defining a mine restoration effect evaluation target, an evaluation range and a function unit, and carrying out the evaluation of the mine ecological restoration effect based on the evaluation range and the function unit; collecting resource consumption data, environmental emission data and ecological state data in the restoration process, and constructing a dynamic life cycle list database; and carrying out characterization calculation on data in the dynamic life cycle list database to obtain a preliminary environmental influence index value, establishing a recognition rule of a life cycle evaluation model based on sensitivity analysis of the soil microbial community in the mine restoration area to heavy metal stress, and recognizing the ecological toxicity potential of fresh water from the preliminary environmental influence index value. According to the method, the decision support report is generated visually, and multi-dimensional, dynamic and accurate evaluation of the mine restoration effect is realized.

The technology includes a method for removing sulfur dioxide (SO2) from a gas stream, where SO2 gas is contacted by a diluted sulfuric acid (H2SO4) stream and absorption takes place in a quench tower. The dissolved SO2 reacts with the excess of oxygen in the gas stream, where the oxidation results in the formation of sulfurous acid (H2SO3) and dilute H2SO4. For the complete oxidation of the dissolved SO2, an electrolyzer and / or liquid injectants are used. This results in the formation of diluted H2SO4. The diluted H2SO4 is processed in an enrichment unit to produce concentrated H2SO4 and fresh water. A portion of the diluted H2SO4 and / or fresh water is recycled back to the quench tower for the continued acidic absorption of the incoming SO2 in the gas stream, thereby not relying on an external water source.

The invention belongs to the technical field of sampling and screening, and discloses a sampling and screening device for benthonic animals in a fresh water body, which comprises a working shell, one side of the working shell is communicated with a rectangular shell, the top of the working shell is fixedly connected with a traction rope, one side of the outer wall of the rectangular shell is fixedly connected with a flexible filter screen, and the sampling and screening device further comprises a sampling and screening mechanism, the sampling and screening mechanism comprises a square shell fixedly connected to the two ends of one side of the outer wall of the working shell, one side of the inner wall of the square shell is fixedly connected with a motor, the output end of the motor is fixedly connected with a rotating shaft, and the working shell also drives the rectangular shell and the flexible filter screen to move together. And on the flexible filter screen, small animals at the water bottom can be screened by a screen opening of the flexible filter screen and enter the working shell, so that the sampling of the animals is completed. After entering the working shell, the animals further enter the working shell through the sampling shell. Small animals and silt can be filtered and discharged through the filtering holes in the inner wall of the sampling shell, so that the collected objects are effectively screened.

The invention discloses an intelligent monitoring method and system for the durability of mass concrete in a salt-fresh water area, and the method comprises the steps: carrying out the field analysis of a salt-fresh water mass concrete monitoring project, and dividing a salt-fresh water monitoring area into a plurality of monitoring nodes; according to the specific conditions of different salt-fresh water mass concrete monitoring projects, monitoring is carried out at each monitoring node through a sensor and an unmanned aerial vehicle; analyzing the sensor historical data set of each monitoring node through a priority level division algorithm, dividing monitoring priority level types, and generating a monitoring priority level list corresponding to each monitoring node; performing feature extraction and training on the unmanned aerial vehicle historical data set of each monitoring node through a DenseNet-MLP network model, wherein the trained model is used for durability risk monitoring of each monitoring point; through deep learning model monitoring, the monitoring node priority list is introduced for monitoring management and control, concrete durability intelligent monitoring is realized, and the concrete durability risk monitoring precision in the salt and fresh water area is improved.

According to the plasma high-efficiency water purification system and method suitable for factory-like circulating aquaculture, a water purification unit with a plasma secondary reaction technology as a core is constructed, and a low-energy-consumption cold plasma generator is used for pre-activating gas and introducing the gas into a water body in a micro-nano bubble form; further, an underwater SDBD cold plasma generator is utilized to secondarily excite the activated bubbles to obtain underwater micro-plasmas, and short-life ROS (reactive oxygen species) mainly comprising. OH is efficiently generated through a gas-liquid interface micro-discharge effect, so that pathogenic microorganisms and harmful components such as ammonia nitrogen and nitrite in aquaculture sea and fresh water are quickly and efficiently purified; an electrochemical reaction technology and an internal circulation technology are utilized to construct a plasma by-product elimination unit, the electrochemical reaction technology enables the biotoxicity of a water body to be rapidly reduced to a safe level, and the internal circulation technology avoids the problem of plasma reaction tail gas pollution.

The invention belongs to the technical field of comprehensive utilization of seawater resources, and particularly relates to a green circulation method and system integrating seawater desalination and high-efficiency bromine extraction of concentrated seawater, and the system comprises a seawater desalination unit, a pretreatment unit, an oxidation replacement unit, a bromine elementary substance blowing-out unit, a bromine elementary substance absorption and enrichment unit and a bromine rectification and purification unit which are sequentially connected in series, the pipelines of the units are communicated to form a continuous material channel; the seawater desalination unit is used for producing fresh water and enriching concentrated seawater; the pretreatment unit removes impurities through a security filter and adjusts pH through an acidification pool; the oxidation replacement unit mixes chlorine and concentrated seawater through a gas-liquid mixer, and a bromine solution is generated in a reaction tank; the stripping tower realizes bromine gas stripping through atomization spraying, a filler area and a gas distributor; the absorption tower enriches bromine into hydrobromic acid by using a sulfur dioxide aqueous solution; the rectification unit is oxidized by a distillation tower, condensed and separated to obtain liquid bromine. The method realizes synchronous recovery of fresh water and bromine resources, conforms to a green circulation concept, and has remarkable economic and ecological benefits.

The invention discloses a condensation brine desalination system for a greenhouse. The condensation brine desalination system comprises a condensation system, a heat storage system, a heat supply system, a power supply system, a water supplementing system and the greenhouse. When the system works, the compound paraboloid condenser gathers sunlight, then the sunlight is transmitted in a wave band mode through the frequency division glass, low-wave-band light drives photovoltaic power generation, and high-wave-band light is used for saline water interface evaporation; water vapor generated in the salt water desalination process is condensed by the condensing device to generate fresh water, and then the fresh water is introduced into the greenhouse, so that proper humidity and temperature in the greenhouse can be maintained while the fresh water required by irrigation is obtained; the condensation device recovers condensation heat, the condensation heat is stored through the heat storage system, and heat is supplied to the greenhouse through the buried pipe when the temperature is low at night. When sunlight is insufficient, the storage battery supplies power to the LED lamp in a light supplementing mode, and photosynthesis of plants is guaranteed. The system is suitable for regions lacking fresh water resources but sufficient in saline water and brackish water, and has the characteristics of self-sufficiency, high scale adaptability, low energy consumption and the like.

The invention discloses a fresh water recovery system based on seawater desulfurization. The fresh water recovery system comprises a flue gas header pipe, an evaporation tower, a condensing tower, a desulfurization tower and a seawater delivery system, the seawater conveying system is used for providing seawater for the desulfurization tower so as to absorb sulfur dioxide in flue gas flowing from the flue gas main pipe; seawater absorbing sulfur dioxide as a cooling medium flows through the condensing tower and then enters the evaporation tower to serve as a water source; part of the flue gas of the flue gas header pipe enters the evaporation tower to serve as a heat source to realize evaporation of a water source, and the flue gas with water vapor flows into the condensation tower to realize condensation. The desulfurization process and the fresh water recovery process are organically combined, flue gas waste heat is used for driving seawater evaporation, meanwhile, desulfurized low-temperature seawater is used as a condensation cooling medium, the energy utilization efficiency is remarkably improved, dependence on external energy is reduced, the consumption of seawater is reduced through circulating gradient utilization of seawater, and the energy consumption is reduced. And valuable fresh water is produced while flue gas desulfurization is realized.

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.

An offshore hydrogen production platform hydrogen production equipment cooling system comprises a gas-liquid treater, a hydrogen purification device, a chilled water machine, a hydrogen compressor and a hydrogenation machine, an inlet of the gas-liquid treater is connected with an electrolytic bath, and an outlet of the gas-liquid treater is sequentially connected with a hydrogen passivation device, the hydrogen compressor, a buffer gas tank, the hydrogen compressor, a hydrogen storage tank and the hydrogenation machine. The hydrogen adding machine is communicated with the hydrogen-powered ship and provides hydrogen for the hydrogen-powered ship, and the refrigerating unit is connected with the hydrogen passivating device through a pipeline to form a circulating pipeline. Aiming at the characteristics of offshore and shallow sea areas and a fixed hydrogen production platform, when hydrogen production equipment is cooled, required fresh water is provided through cooling of the air cooling radiator arranged on the main deck of the platform, so that the situation that seawater with poor cleanliness in the offshore and shallow sea areas flows through a plate heat exchanger to cool the fresh water to be provided is avoided; the cooling efficiency is improved.

A solar heat pump coupled multi-stage humidification and dehumidification water treatment system and a working method thereof, the system comprising a water treatment circulating subsystem, a solar hot water circulating subsystem and a compression heat pump circulating subsystem; the working method is that raw liquid is heated by solar prepared hot water and a compression heat pump condenser, sequentially enters two-stage humidifiers to exchange heat and mass with air, preheats air and discharges; circulating air sequentially undergoes two humidifications in the two-stage humidifiers, is gradually cooled and dehumidified in a pre-cooler, a dehumidifier and a heat pump evaporator, is preheated by the discharged raw liquid and then undergoes the next cycle, and condensed water obtained by condensing steam in the air is collected into a fresh water tank after heat exchange in a heat pump subcooler. The present application uses the hot raw liquid after one-stage humidification to complete two-stage humidification, uses a pre-cooler, high flow raw liquid and a heat pump evaporator to complete multi-stage dehumidification, and uses the solar hot water system to simultaneously introduce the heat pump system, thereby realizing all-weather fresh water supply demand.

The invention discloses an infrared monitoring jet device and method for removing limnoperna fortunei in a pipeline, and belongs to the technical field of pipeline maintenance and cleaning. The breeding of the limnoperna fortunei on the inner wall of the water conveying pipeline causes high cost, low efficiency, environmental pollution and the like; by arranging the infrared monitoring system, the growth condition of limnoperna fortunei on the inner wall of the pipeline can be accurately monitored in real time, and data can be transmitted to the control system in time; the control system performs deep analysis on the received data, and immediately controls the clearing execution system to start the high-pressure water jet device once judging that the scale of the limnoperna fortunei reaches a preset threshold value, so that the limnoperna fortunei is strongly scoured, and efficient clearing is realized; meanwhile, a hydroelectric generation system is ingeniously utilized, water flow power in the pipeline is converted into electric energy, and continuous and stable electric power support is provided for the whole device; the pipeline limnoperna fortunei cleaning device achieves automatic and environment-friendly cleaning of the pipeline limnoperna fortunei, has the remarkable effects of being efficient, energy-saving, safe, reliable and the like, and can be widely applied to maintenance work of various water conveying pipelines.

According to the offshore green hydrogen methanol production system and method based on waste heat coupling electrodialysis to achieve fresh water self-supply, in the system, a PEM electrolytic hydrogen production subsystem electrolyzes fresh water through renewable energy source electric power to produce high-pressure hydrogen and oxygen, and process waste heat is generated; the methanol synthesis subsystem is connected with the PEM electrolytic hydrogen production subsystem, so that hydrogen and carbon dioxide are synthesized into crude methanol under the action of a catalyst, the crude methanol is rectified and purified into a green methanol product, and meanwhile, reaction waste heat is generated; the multi-stage electrodialysis seawater desalination subsystem is connected with the PEM electrolytic hydrogen production subsystem, seawater is subjected to multi-stage electrodialysis desalination treatment by the multi-stage electrodialysis seawater desalination subsystem to generate fresh water, and the fresh water is buffered by a fresh water storage tank and then is fed back to the PEM electrolytic hydrogen production subsystem to form a fresh water self-sustaining closed loop; and the heat recovery cooling water circulation loop respectively exchanges heat with the PEM electrolytic hydrogen production subsystem and the methanol synthesis subsystem so as to recover waste heat.

Seawater desalination or deionization of water by sunlight and the use of piping systems, characterized in that, in addition to the open pipe with forward-flowing liquid that becomes increasingly salty due to sunlight and evaporation, and the pipe for freshwater, a return piping system for water with a high salt content is present.

The invention relates to a solar seawater desalination device applied to a lifeboat, and belongs to the technical field of seawater desalination. The solar seawater desalination device applied to the lifeboat comprises a barrel body, a barrel body cover, a condensation pipe, a vacuum pump and a solar panel, the barrel body and / or the barrel body cover are / is light-permeable; a partition plate is transversely arranged in the can body and divides the containing cavity into a first containing cavity and a second containing cavity, and the first containing cavity is located above the second containing cavity. An annular partition plate located on the partition plate is arranged in the first containing cavity. A plurality of through holes are formed in the annular partition plate, and a photo-thermal material is placed in the annular partition plate; the vacuum pump can be used for pumping seawater into the first accommodating cavity or vacuumizing to form negative pressure; and the solar panel is used for supplying power to the vacuum pump. According to the solar seawater desalination device applied to the lifeboat, seawater can be converted into fresh water by utilizing solar energy, and the problem of fresh water shortage of the lifeboat is solved.

This invention discloses a cold transfer printing device with wastewater recycling treatment, belonging to the field of multi-stage wastewater treatment. It includes a retrieval mechanism, with a mixing and purification mechanism located to its right. The retrieval mechanism includes a settling tank, with side plates integrally formed on both sides of the top of the settling tank. A motor is fixedly connected to the left front of the side plate located on the left side of the upper surface of the settling tank. A reciprocating lead screw is fixedly connected to the right end of the output shaft of the motor between the two side plates. Through the synergistic action of the retrieval mechanism and the mixing and purification mechanism, the cold transfer printing wastewater can be recycled after impurity retrieval and chemical purification, significantly reducing the consumption of fresh water. The collection box facilitates the centralized collection of fiber impurities for subsequent treatment or recycling, reducing solid waste pollution. The purification tank effectively removes alkaline substances, residual dyes, and auxiliaries from the wastewater through chemical reactions, reducing the risk of water pollution from wastewater discharge.

The invention belongs to the technical field of biomass energy, and discloses an energy system based on biomass gasification, which is characterized in that biomass is converted into high-temperature synthesis gas flow by a gasification furnace, the high-temperature synthesis gas flow enters a carbon dioxide supercritical device to heat carbon dioxide fluid into supercritical fluid so as to drive power generation, and medium-high-temperature synthesis gas flow is formed; the medium-high-temperature synthesis gas flow enters the organic Rankine cycle device to heat and evaporate the organic fluid into high-enthalpy fluid to drive power generation and form medium-low-temperature synthesis gas flow, and the medium-low-temperature synthesis gas flow enters the seawater desalination device to evaporate and separate seawater into fresh water and saline water and form low-temperature synthesis gas flow; the methanol synthesis device captures hydrogen and carbon dioxide in the low-temperature synthesis gas flow and synthesizes methanol; electric energy and fresh water are obtained through stepped utilization of heat energy of synthesis gas flow, the energy utilization rate is greatly improved, hydrogen energy is obtained by capturing hydrogen in the synthesis gas flow, and carbon dioxide in the synthesis gas flow is further captured to synthesize methanol with the hydrogen.

The present application relates to a kind of ice fresh water product in the defrosting device in the determination of gamma radionuclide, solve the problem that ice fresh water product in the determination of gamma radionuclide, the surface of sample box with ice fresh sample is condensed water and frost problem.The circumferential outside of the sample box of the device is provided with water receiving groove;The upper surface of the upper cover of the sample box is provided with transmission top plate, the bottom surface of the sample box is provided with transmission bottom plate, the upper surface of the transmission top plate is provided with driving roller in the middle, the left and right sides of the transmission top plate are provided with upper deflection roller, the left and right sides of the bottom end of transmission bottom plate or sample box are provided with lower deflection roller, water-absorbing cloth is sequentially wound around driving roller, left upper deflection roller, left lower deflection roller, right lower deflection roller, right upper deflection roller and connected to driving roller again.The sample box of frozen water product gamma radionuclide determination can be defrosted on surface, avoid sample box outer wall to form condensed water and frost, cause influence to the internal environment of detector.

The groundwater-sealed cavern seawater intrusion visualization device, monitoring method and device disclosed by the application relate to the technical field of test simulation devices and can simulate the seawater intrusion process during the excavation and operation of a groundwater-sealed cavern. The device comprises a box body and a cavern. The device further comprises two controllable water-permeable isolation components located in the box body, which divide the box body into two recharge chambers and a geological environment simulation chamber. The cavern is located in the geological environment simulation chamber. The two recharge chambers comprise a freshwater recharge chamber and a seawater recharge chamber. The cavern comprises a porous hole body and a release-type shielding film. When the hole body is in an unexcavated state, the release-type shielding film is formed on the surface of the porous hole body close to each recharge chamber and the top and bottom ends of the porous hole body. When the hole body is in an excavated state, the surface of the porous hole body close to each recharge chamber and the top and bottom ends of the porous hole body are exposed.

This application relates to the field of feed additive technology, specifically disclosing a seaweed feed additive, its preparation method, and its application. The preparation method of the seaweed feed additive provided by this application includes the following steps: seaweed pretreatment, high-temperature fermentation, and functional fermentation; specifically, freshly harvested seaweed is washed sequentially with seawater and fresh water, then dehydrated to a moisture content of 75-85%; the seaweed is then cut into sections, crushed, and pulped, and auxiliary materials are added to obtain a mixed seaweed slurry; then, the mixed seaweed slurry is subjected to high-temperature fermentation at 65-80℃ using high-temperature compound bacteria; subsequently, the mixed slurry is subjected to functional fermentation at 25-35℃ using functional compound bacteria. The preparation method of the seaweed feed additive provided by this application has advantages such as low processing cost and simple operation, and the effective components of the obtained seaweed feed additive have a high utilization rate, which has a good promoting effect on animal growth.

The invention relates to the field of industrial wastewater treatment, in particular to industrial polluted wastewater membrane treatment recycling equipment which comprises a water inlet unit, a membrane treatment unit and a water outlet unit. The water inlet unit comprises a water storage tank; the membrane treatment unit comprises a nanofiltration membrane mechanism, a concentrated water treatment mechanism and a fresh water treatment mechanism; a water outlet of the water storage tank is communicated with a water inlet of the nanofiltration membrane mechanism through a pipeline; a concentrated water outlet of the nanofiltration membrane mechanism is communicated with a water inlet of the concentrated water treatment mechanism through a pipeline; compared with other conventional treatment systems, the industrial polluted wastewater membrane treatment and recycling equipment has high advantages in investment and cost, can greatly reduce the operation cost, is wide in application, can be suitable for municipal wastewater, coal chemical wastewater, power plant wastewater and the like, is high in practicability, and can be used in cooperation with PLC control, so that the industrial polluted wastewater can be recycled. Automatic operation can be achieved, and operation, running and maintenance are convenient.

The low-energy-consumption and high-efficiency seawater desalination and water purification process is achieved by applying photothermal conversion materials such as a carbon nanotube film, and finally fresh water meeting the drinking standard is obtained. Meanwhile, seawater (namely brine) which is concentrated to reach the critical concentration of salt crystallization is conveyed to the house type crystallizing pond. Afterwards, under the action of continuous solarization and wind blowing, water is promoted to be further evaporated until the brine reaches a supersaturated state, so that salt such as sodium chloride is gradually separated out to form salt crystals, and the table salt is obtained.