99 results about "Salt crystallization" patented technology

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 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.

This invention provides a quadruple ion-coupled erosion-protected concrete and its preparation method, relating to the field of special concrete materials technology. The concrete comprises basic components and functional admixtures. The basic components include cementitious materials, aggregates, and water. The functional admixtures include a coupling ion locking agent, a dual-interface film-forming aid, and a salt-expansion-resistant crack-resistant agent. The coupling ion locking agent includes calcined calcium aluminum hydrotalcite and diethylenetriamine pentacarboxylate; the dual-interface film-forming aid includes isobutyltriethoxysilane and lithium silicate; and the salt-expansion-resistant crack-resistant agent includes calcium sulfoaluminate expansion agent and lightly calcined magnesium oxide. The three admixtures work synergistically from three dimensions: active ion solidification, in-situ interface shielding, and full-cycle volume compensation, achieving simultaneous solidification of the four erosion ions, continuous blocking of penetration channels, and effective offsetting of salt crystallization expansion stress. This ensures the long-term safe service of the concrete under extreme conditions of high water pressure, high humidity, alternating wet and dry conditions, and multi-ion coupling erosion.

The invention discloses an evaporative crystallization salt separation system and method for high-salinity wastewater. The system comprises a first nanofiltration unit, a first concentrated water preheating unit, a first falling film concentration unit, a first primary-effect evaporation unit, a secondary-effect finished salt unit, a last-effect carnallite unit, a carnallite incineration unit, a second nanofiltration unit, a second concentrated water preheating unit and a second falling film concentration unit which are communicated in sequence, a second primary evaporation unit and a second crystallization finished salt unit; the secondary-effect finished salt unit is used for separating out divalent finished salt, the last-effect carnallite unit is used for separating out carnallite, and the crystallized finished salt unit is used for separating out monovalent finished salt. According to the system, through coupling of three processes of nanofiltration pre-concentration, directional crystallization and carnallite incineration regeneration, the bottleneck of a traditional technology is broken through, and carnallite, high-purity sodium sulfate finished product salt and sodium chloride finished product salt are separated out.

The invention discloses an experimental device and an experimental method for a brine discharging pipe column in a salt cavern energy storage cavern shaft, relates to the technical field of pipe column experimental devices, and aims to solve the problem of how to improve the accuracy of a salt crystallization experiment result of the brine discharging pipe column. The experimental device comprises an experimental tubular column, a first water injection assembly and a second water injection assembly, the experimental tubular column comprises an outer-layer tubular column body and an inner-layer tubular column body located in the outer-layer tubular column body, and a cooling flow channel is formed between the outer circumferential face of the inner-layer tubular column body and the inner circumferential face of the outer-layer tubular column body; the first water inlet of the inner-layer tubular column and the second water outlet of the outer-layer tubular column are located at one end of the experimental tubular column, and the first water outlet of the inner-layer tubular column and the second water inlet of the outer-layer tubular column are located at the other end of the experimental tubular column. A water outlet of the first water injection assembly is connected with the first water inlet, and a water return port of the first water injection assembly is connected with the first water outlet and used for injecting brine. A water outlet of the second water injection assembly is connected with the second water inlet, and a water return port of the second water injection assembly is connected with the second water outlet and used for injecting cooling water.

This utility model discloses a salt replenishment device for aquaculture to prevent salt accumulation. It includes a mixing component and a salt inlet component installed on one side of the mixing component, as well as a water tank component placed below the mixing component. The water tank component includes a base plate, with an mounting block installed at the top center of the base plate. A water distribution hopper is fixedly installed on the top of the mounting block. Three sets of telescopic rods are installed on the top of the base plate, and water troughs are installed on the tops of the telescopic rods. The salt inlet component includes a salt feeder, the outlet of which is connected to the mixing component, and a salt hopper installed at the inlet of which. This utility model uses telescopic rods to move the water tank upwards, creating a gap between the water tank and the water distribution hopper. This gap, combined with the inclined design of the water tank, allows excess salt solution to be discharged, preventing salt crystals formed from the evaporation of residual brine from mixing with fresh brine and resulting in a higher actual salt content.

This utility model relates to the field of concentrated brine technology and discloses a concentrated brine concentration device for the steel industry. The device includes a concentration tank with a cover on top and a concentration assembly inside. In this concentrated brine concentration device, steam contacts the liquid as much as possible before entering the outlet, releasing more latent heat. Compared to direct top dissipation or simple heating, this results in a larger heat exchange area, higher heat utilization, and reduced energy consumption. Simultaneously, the steam pipes are heated to prevent their temperature from falling below the waste liquid temperature, thus avoiding cold spots and preventing salt crystallization on lower surfaces, improving heat exchange efficiency. Regular scraping by a scraper removes initial deposits of crystals or soft scale, preventing further accumulation into hard scale, keeping the steam pipes and concentration tank surface clean, improving heat exchange efficiency, and reducing operating energy consumption.

The present invention relates to the technical field of edible salt preparation, and particularly discloses a solar energy and electric heating combined driven edible salt crystal preparation method and apparatus, the apparatus comprises: a crystallization pool, the wall surface of the crystallization pool comprises a heat conduction contact surface layer, a sealing heating interlayer and a thermal insulation substrate, a protective cover capable of sealing the crystallizing pond is hinged to an opening of the crystallizing pond; the heating module comprises an electric heat conduction element arranged in the sealed heating interlayer, a fixed power source and a solar storage battery, the fixed power source and the solar storage battery can supply power to the electric heat conduction element, and the solar storage battery is in electric signal connection with a photovoltaic panel; the stirring assembly comprises a plurality of stirring shafts arranged in the crystallizing pond, stirring blades arranged on the stirring shafts respectively and a power mechanism for driving the stirring shafts to rotate, so that the problems that in traditional edible salt crystallization preparation, edible salt is prone to being polluted, and the crystallization process is restricted by weather are solved.

The invention discloses an aerogel-based evaporator with a double-network structure as well as a preparation method and application of the aerogel-based evaporator, and relates to the technical field of water treatment. According to the aerogel-based evaporator, sodium alginate and nanocellulose are used for constructing an interpenetrating dual-network as a framework, acidified carbon nanotubes are combined as a photo-thermal material, and the aerogel-based evaporator is prepared through a sol-gel method and a freeze-drying process. The double-network structure synergistically exerts the advantages of super hydrophilicity and high mechanical strength, and salt ion deposition and crystallization are effectively inhibited; the acidified carbon nanotubes guarantee efficient photo-thermal conversion, and the solar energy utilization rate is improved. The evaporator successfully solves the problems that traditional equipment is low in solar energy utilization rate, salt crystallization damages the evaporator and the like, has excellent mechanical stability, wide water body adaptability and light environment adaptability, and is environment-friendly in preparation process, easy to produce on a large scale and suitable for industrial production. And an efficient and stable novel technical scheme is provided for solar-driven water purification and seawater desalination.

The application provides a preparation method of MK-0616 south fragment, and relates to the technical field of polypeptide synthesis. The preparation method comprises the following steps: condensation reaction of alkyl primary alcohol 17 and protected amino acid 2 to obtain intermediate 18; deprotection reaction of the intermediate 18 to obtain intermediate 19; condensation reaction of the intermediate 19 and compound 4 to obtain intermediate 20; deprotection reaction of the intermediate 20 to obtain intermediate 21; condensation reaction of the intermediate 21 and compound 10 to obtain intermediate 22; deprotection reaction of the intermediate 22 to obtain intermediate 23; condensation reaction of the intermediate 23 and compound 14 to obtain intermediate 24; hydrolysis reaction of the intermediate 24 to obtain a crude product of MK-0616 south fragment; salt crystallization of the crude product of MK-0616 south fragment to obtain intermediate 15; and free acidization of the intermediate 15 to obtain a pure product of MK-0616 south fragment.

The invention discloses a method for predicting an ammonium salt corrosion high-risk area of a catalytic cracking fractionation device. The method comprises the following steps: acquiring process structure parameters of a heavy oil catalytic cracking fractionation device to be detected and physical property data of reaction oil gas composition; establishing a process calculation model of the fractionation device according to the process characteristics and the physical property data of the reaction oil gas composition; solving material flow parameters in the fractionation device by using the model, and analyzing material flow characteristics such as vapor-liquid phase distribution, temperature distribution and corrosive medium component distribution in the device; calculating an ammonium salt crystallization temperature based on the material flow characteristics; and identifying and determining a high-risk area of ammonium salt crystallization corrosion in the fractionation device by combining the material flow characteristics and the ammonium salt crystallization temperature. The method can rapidly and accurately predict the ammonium salt crystallization corrosion high-risk area in the heavy oil catalytic cracking fractionation device, effectively reduces corrosion damage, optimizes anti-corrosion measures, improves the safe operation performance of the device, and is suitable for corrosion prediction and protection of petrochemical equipment.

This application relates to a flexible packed bed ultragravity evaporator, including an evaporation tower and an isolation air plate disposed within the evaporation tower. The isolation air plate divides the space inside the evaporation tower into an evaporation space and an air inlet space. It also includes a hollow water separator disposed within the evaporation tower and rotatably connected to the evaporation tower, a water inlet pipe with its first end connected to a water source and its second end extending into the first end of the hollow water separator, flexible packing material filled within the evaporation space, and an ultraviolet cleaning lamp disposed on the inner wall of the evaporation tower. The first end of the hollow water separator communicates with the space outside the evaporation tower, the air inlet communicates with the air inlet space, and the exhaust port communicates with the evaporation space. The flexible packed bed ultragravity evaporator disclosed in this application uses a direct gas-liquid contact method to reduce the complexity of the equipment structure. It uses flexible packing material as the intermediate medium for gas-liquid contact, increasing the contact area while avoiding corrosion problems. Simultaneously, it can remove salt crystals from the surface of the flexible packing material, solving the clogging problem.

The application discloses a carbon dioxide salt crystallization observation system and method, relates to the technical field of carbon dioxide storage, and is characterized in that a micro-nano fluidic chip is assembled in a holder, a carbon dioxide injection device is connected with a first injection hole of the micro-nano fluidic chip, a brine injection device is connected with a second injection hole of the micro-nano fluidic chip, a temperature regulation device is connected with the holder, and an image shooting device is connected with an image acquisition device. The micro-nano fluidic chip can be used to simulate salt crystallization behavior at a micro scale. By regulating the injection pressure of different phase carbon dioxide through the carbon dioxide injection device, the injection pressure of different types of brine through the brine injection device, and the internal temperature of the holder through the temperature regulation device, and in combination with the image acquisition device, the salt crystallization picture of the micro-nano fluidic chip shot by the image shooting device can be acquired in real time, so that the dynamic evolution process of salt crystallization under different temperature, pressure, phase carbon dioxide and brine type factors can be dynamically observed in real time.

According to the graded photo-thermal-gradient needle tip array type saline-alkali soil evaporator and the preparation method thereof, cork wood-derived cellulose is used as a matrix raw material, a graded photo-thermal layer of carbon nano tubes and biochar is constructed, a gradient-size needle tip array is designed, and a porous hydrogel matrix structure is optimized, so that the graded photo-thermal-gradient needle tip array type saline-alkali soil evaporator is obtained. And the evaporator with the functions of efficient photo-thermal conversion, directional water transmission and thorough salt falling is prepared. The full-spectrum absorption efficiency of the prepared evaporator is larger than or equal to 95%, the salt crystallization falling rate is larger than or equal to 98%, the evaporation rate reaches 1.8 kg / mh under one sunlight intensity, the performance degradation is smaller than or equal to 5% after 100-hour continuous operation, the problems that a traditional evaporator is low in photo-thermal efficiency, salt is left and accumulated, and the water transmission resistance is large can be effectively solved, and the evaporator is suitable for saline-alkali soil treatment, fresh water generation and mineral salt collection scenes.

The application provides a high-salt water and superheated steam vacuum spray flash evaporation device, and belongs to the technical field of high-salt water treatment, which comprises a flash evaporation box body, a salt water spraying assembly, a steam spraying pipe, a mesh barrier assembly, a first driving assembly and a second driving assembly, the salt water spraying assembly extends from the top of the flash evaporation box body to the inside of the flash evaporation box body and is used for spraying high-salt water into the inside of the flash evaporation box body in a conical state, the steam spraying pipe extends from the bottom of the flash evaporation box body to the inside of the flash evaporation box body and is used for spraying high-temperature steam into the inside of the flash evaporation box body in a conical state, and the mesh barrier assembly is arranged in the inside of the flash evaporation box body and is used for shielding salt-containing crystalline particles that float with steam. Compared with the prior art, the embodiment of the application can effectively avoid that high-temperature steam carries a small amount of fine salt-containing crystalline particles out of the flash evaporation box body, avoids the loss of salt-containing crystalline particles, and improves the collection efficiency of salt-containing crystalline particles.

The utility model relates to the technical field of zero discharge of wastewater, and provides a zero-discharge integrated device for flash evaporation of high-salinity wastewater by waste heat, which comprises an evaporation kettle, the evaporation kettle comprises a middle-layer tank body, an upper-layer tank body is arranged at the upper end of the middle-layer tank body, a lower-layer tank body is fixedly mounted at the lower end of the middle-layer tank body, and a connecting pipe I is mounted at the upper end of the upper-layer tank body in a penetrating manner; a heating coil is fixedly mounted on the outer side of the lower end of the middle-layer tank body; a supporting frame is fixedly mounted on the outer side of the lower-layer tank body; a tower kettle ring is slidably mounted in the middle-layer tank body; a cleaning assembly is fixedly mounted at the lower end of the tower kettle ring and drives a screw rod through a driving motor; the connecting ring, the connecting rod and the cleaning scraping disc operate, so that residual salt crystals on the inner wall of the middle-layer tank body can be cleaned in time, good heat transfer and fluid flowing properties of equipment are maintained, the evaporation efficiency is guaranteed, and the energy consumption is reduced.

This invention discloses an experimental analysis method for dynamic blockage of salt crystallization under a real pore network. A heterogeneous microfluidic chip is constructed based on the pore structure of a real core sample. Microfluidic experimental equipment is installed. Pressure difference-normalized time curves are obtained during CO2 injection into the chip in saturated pure water and saturated saline water. The gas-liquid two-phase flow behavior, salt crystallization nucleation, crystal growth, and deposition processes within the microchannels of the microfluidic chip are recorded. The pore volume blockage rate is quantitatively calculated based on image analysis, and the pressure contribution term is normalized and quantitatively characterized. A final comprehensive blockage index is calculated by combining the pore volume blockage rate and the pressure contribution term. Experimental conditions are varied, and the experiment is repeated to obtain salt precipitation blockage data under different conditions. This invention combines image recognition and pressure data fusion analysis to propose a comprehensive dynamic blockage index, achieving continuous quantitative discrimination and dynamic evolution characterization of different blockage states.

The invention discloses an interface enhanced UHPC bridge pier protection shell structure in a tropical damp and hot salt mist environment, and relates to the technical field of bridge pier protection, and the interface enhanced UHPC bridge pier protection shell structure comprises a shell part fixedly attached to the exterior of a bridge pier body; the side, close to the pier body, of the shell is provided with a main road, and the side of the main road communicates with a branch road. A material barrel is arranged at the top of the main channel, a material bin and a drying bin are arranged in the material barrel, the drying bin is located above the material bin, a drying plate is installed in the drying bin, and the material barrel is filled with a drying agent. According to the interface enhanced UHPC bridge pier protection shell structure in the tropical damp and hot salt mist environment, by arranging the charging barrel, the bottom box and other structures, directional suction and discharge of salt-containing steam are achieved, drying agents are sprayed in a distributed mode, the interface moisture concentration is effectively reduced, the situation that salt-containing moisture accelerates salt crystallization erosion and carbonization processes of concrete of a bridge pier body is avoided, and the service life of the bridge pier body is prolonged. And meanwhile, local micro-cracks, caused by humidity imbalance, on the inner side of the shell are prevented.

This application discloses an aerogel interfacial evaporator, its preparation method, and its applications. The preparation method includes: taking chitosan and preparing a chitosan solution; mixing anionic polyelectrolytes and a structural stabilizer to prepare a mixed solution; slowly adding the mixed solution dropwise to the chitosan solution to form a composite solution; adding a photothermal conversion material to the composite solution to form a suspension; injecting the suspension into a pre-cooled mold and freezing the mold to solidify the suspension; subsequently, vacuum drying the solidified suspension to obtain an aerogel with a porous structure; immersing the aerogel with the porous structure in a solution containing a crosslinking agent for reaction; after crosslinking is completed, cleaning and drying the aerogel to obtain the aerogel interfacial evaporator. The aerogel interfacial evaporator disclosed in this application has multiple effects, such as improving evaporation efficiency, inhibiting salt crystallization, and enhancing evaporator stability, and has broad application prospects in seawater desalination, wastewater treatment, and other fields.

The utility model discloses a simulation device for water and salt migration in a soil body under freeze-thaw cycle, which relates to the technical field of water and salt migration simulation devices and comprises a visual acrylic test barrel, an upper temperature conducting disc, a lower temperature conducting disc, a water and salt supply device, a fluorescent agent, a blue light lamp, a data acquisition instrument, a plurality of hydrothermal salt sensors, a water level monitor and two low-temperature thermostatic baths. According to the design, the problem that the accuracy of a water and salt migration simulation test in a soil body is influenced because the original device cannot observe the soil column change in the freezing and thawing process of the salinized soil from a macroscopic angle is solved. According to the utility model, the vacuum layer is adopted to achieve a heat preservation effect, a fluorescent agent is added into the replenishment liquid, and an internal freezing frontal surface, ice crystals and salt crystals can be observed through the acrylic glass barrel. When water and salt migration in the soil body is simulated, data are more accurate, the reliability of a test result is improved, and the water and salt migration process in the soil column is more visually observed.

The invention relates to the technical field of industrial salt-containing wastewater environment-friendly treatment, in particular to a coal chemical salt-containing wastewater efficient salt separation resourceful treatment system which comprises a homogeneous regulation unit, an impurity removal pretreatment unit, a removal module, a mirabilite freezing crystallization separation unit, a crystallization separation module, a mother liquor drying unit and a mixed salt redissolution unit. The removal module comprises a primary organic matter removal unit, an evaporation and concentration unit and a secondary organic matter removal unit; the crystallization separation module comprises a sodium sulfate crystallization separation unit, a sodium chloride crystallization separation unit and a mixed salt crystallization separation unit. The system adopts a low-temperature freezing crystallization method to preferentially separate out mirabilite, effectively improves the recovery rate and quality of a system byproduct sodium sulfate salt, reduces the transportation and disposal cost of carnallite, improves the degradation and removal rate of organic matters, and reduces the equipment investment.

The application discloses a preparation method of high-purity needle-shaped sodium sesquicarbonate crystals and relates to the technical field of inorganic salt crystallization treatment. The sodium sesquicarbonate crystal mother liquor is prepared by dissolving sodium carbonate and sodium bicarbonate, a complex additive composed of polyvinylpyrrolidone and sodium dodecyl sulfate is added into the crystal mother liquor, and crystallization is carried out under the synergistic action of pulse ultrasonic waves, so that needle-shaped sodium sesquicarbonate crystal slurry with a high length-diameter ratio is obtained. After solid-liquid separation, the obtained needle-shaped sodium sesquicarbonate crystal filter cake is washed by anhydrous ethanol under low-temperature conditions, residual moisture among the crystals and on the crystal surface is replaced, the crystals washed by anhydrous ethanol are placed in a supercritical carbon dioxide environment for static drying, the whole-chain anti-agglomeration protection of the needle-shaped sodium sesquicarbonate crystals from crystallization growth to the final dried products is realized, thermal decomposition of the sodium sesquicarbonate is avoided, and the method is suitable for high-quality industrialized preparation of thermosensitive hydrated salts.

The present application belongs to the technical field of wastewater treatment, and provides a preparation method of a gel evaporator with a straight-channel anti-fouling type photo-thermal interface and application thereof. The preparation method is mixing a chitosan solution, a chitosan grafting solution and a glutaraldehyde solution; placing the mixed solution in a container for crosslinking, directional freezing through liquid nitrogen, freezing drying of the frozen material, obtaining an anti-fouling type gel with a straight channel, and finally adsorbing and fixing a layer of photo-thermal layer on the surface of the gel to obtain the gel evaporator with a straight-channel anti-fouling type photo-thermal interface. The internal pores of the evaporator prepared by the present application are arranged in a direction, realizing high-speed continuous water evaporation. The introduction of a polyamphoteric substance 3-(dimethyl(4-vinylbenzyl)amino)propane sulfonate effectively avoids salt crystallization, and guarantees stable and efficient evaporation. The evaporator has a certain ion repulsion and rapid water replenishment, realizes high evaporation rate, and the surface is free of salt crystallization.

The utility model discloses a kind of desulfurization wastewater evaporation tank liquid level devices, combination type liquid level meter is arranged on evaporation tank body, combination type liquid level meter includes the first, second guide rod being arranged inside and outside evaporation tank body, liquid level scale is equipped on the second guide rod, annular first magnetic force float is sleeved on the first guide rod, second magnetic force float is sleeved on the second guide rod, first magnetic force float and second magnetic force float are magnetically adsorbed, cleaning generator is also sleeved on the first guide rod, cleaning generator is driven along the first guide rod under the driving of driving mechanism.Lift with liquid level along with the first magnetic property float in evaporation tank body, the second magnetic property float in evaporation tank body and the first magnetic property float are mutually attracted, the position where second magnetic property float stays is the actual height of liquid level in evaporation tank body.Cleaning generator removes salt crystallization, scale on the surface of first guide rod, ensure that first magnetic property float lifts without resistance, and second magnetic property float truly reacts liquid level height.

This invention discloses a process flow for water injection in a hydrogenation unit. It uses condensate from high-pressure (4.0–3.5 MPa) or medium-pressure steam (1.0–2.0 MPa) as the injection water, continuously injected before the amine salt crystallization temperature along with the reaction effluent or before the high-pressure gas heat exchanger, eliminating the need for a continuous water injection point before the air cooler. Compared with existing technologies, this method offers the following advantages: it minimizes the impact of water injection on the heat exchange of the high-pressure medium, maximizing heat recovery; it avoids the risk of intermittent water injection before conventional heat exchangers; it saves on water injection pipelines and valves before the high-pressure air cooler; and it incidentally recovers the heat from the high-temperature condensate, reducing overall plant energy consumption.

The invention discloses a multi-thorn needle tip type saline-alkali soil treatment evaporator and a preparation method thereof, the multi-thorn needle tip type saline-alkali soil treatment evaporator is prepared by taking light wood pulp as a substrate, composite chitosan, carbon nanotubes and other raw materials through condensation reaction and freeze forming, a main body is a blocky substrate, a conical needle tip structure is integrally distributed on the surface, the taper angle of a needle tip is 12-35 degrees, and the length of the needle tip is 0.8-2.2 cm. Through the multi-thorn needle point type structural design, salt crystals are separated out only at the needle point and fall off automatically by means of gravity, the problem that the salt crystals are accumulated on a photo-thermal interface body is solved, the continuous working time of solar driving interface evaporation is prolonged to 15 h or above from 5 h of a traditional evaporator, the evaporation rate reaches 1.2 kg / mh to 1.5 kg / mh under one sunlight intensity, and the energy consumption is reduced. The salt removal rate of the saline-alkali soil exceeds 60%, meanwhile, passive recovery of mineral salt can be achieved, and an efficient solution is provided for large-scale treatment of the saline-alkali soil.

The invention belongs to the technical field of wastewater treatment, and provides a preparation method and application of an anti-fouling photo-thermal interface gel evaporator with a straight channel, and the preparation method comprises the following steps: mixing a chitosan solution, a chitosan grafting solution and a glutaraldehyde solution; placing the mixed solution in a container for standing and cross-linking, performing directional freezing through liquid nitrogen, performing freeze drying on the frozen material to obtain anti-fouling gel with a straight channel, and finally adsorbing and fixing a photo-thermal layer on the surface of the gel to obtain the anti-fouling photo-thermal interface gel evaporator with the straight channel. According to the prepared evaporator, internal pores are directionally arranged, high-speed continuous water evaporation is achieved, the poly-amphoteric substance 3-(dimethyl (4-vinyl benzyl) amino) propanesulfonate is introduced, salt deposition is effectively avoided, and it is guaranteed that evaporation is stable and efficient. The evaporator has certain ion repulsive force and rapid water supplementation, high evaporation rate is achieved, and the surface is free of salt crystallization.

The invention relates to a salt-cavern gas storage gas injection brine discharge pipe column salt crystallization inhibition system, and relates to the technical field of oil and gas exploitation, the salt-cavern gas storage gas injection brine discharge pipe column salt crystallization inhibition system comprises a pipe column system, a temperature sensor module and a heating device, the pipe column system comprises a brine discharge inner pipe, and the bottom of the brine discharge inner pipe extends to a brine layer at the bottom of a salt cavern cavity to form a brine discharge channel; the heating device is installed on the outer side of the brine discharging inner pipe and used for heating brine in the brine discharging inner pipe, and the temperature sensor module is embedded into the inner wall of the brine discharging inner pipe and used for monitoring temperature data of the brine in the brine discharging inner pipe in real time. According to the scheme, the heating device is matched with the brine discharging inner pipe, and the system can directly and continuously provide heat for brine in the brine discharging inner pipe, so that the temperature of the brine is increased, the solubility of salt is remarkably improved, and salt precipitation caused by temperature reduction in the brine rising process is fundamentally inhibited.

The invention provides an automatic leveling and buffering device of a floating type offshore wind power embarkation platform, and relates to the field of ocean engineering. A buffer plate is slidably connected into the mounting frame; the top end face of the buffer plate is in bolt fastening connection with four hydraulic push rods in an annular array shape. The top end faces of output shafts of the four hydraulic push rods are fixedly connected with a fixing frame. A mounting rotating plate is arranged on the top end face of the fixing frame. In the rotating process of the supporting frame, through a series of actions that the auxiliary protrusions are repeatedly pushed out and withdrawn in the auxiliary holes, solid attachments such as sea salt crystals and sand dust are stripped through physical scraping, meanwhile, a biological film formed in the initial stage is stripped, and the problem that microorganisms and algae spores on the surface of the pedal can gradually form the biological film, so that the biological film is damaged is solved. And the biological membrane not only has strong adhesive force, but also can further intercept salt mist to form local high-concentration saline water on the surface of the pedal so as to accelerate corrosion.

This invention discloses an electromagnetic control valve for drip irrigation networks, belonging to the field of valve equipment technology. It includes a valve body with a main valve core inside, and a valve diaphragm cavity connected to the main valve core. The valve diaphragm cavity drives the opening and closing of the main valve core. The key feature is that a filter device is connected to the upstream flow channel of the main valve core. The outlet of the filter device is connected to a first pilot passage and a second pilot passage, both of which are connected to the valve diaphragm cavity. Fluid filtered by the filter device enters the valve diaphragm cavity through either the first or second pilot passage. This invention also discloses a control method for the electromagnetic control valve in drip irrigation networks. This invention achieves physical isolation switching through the first and second pilot passages, in conjunction with a reversing valve. Even if one pilot passage is completely blocked by salt crystallization or silt, the device can seamlessly switch to the backup passage to continue operation.