536 results about "Salt water" patented technology

The invention discloses a printing and dyeing wastewater zero-discharge treatment process based on low-pressure high-power membrane concentration and salt separation synergy. The wastewater is sequentially subjected to the steps of double-alkali softening pretreatment, organic pollutant treatment, forward osmosis low-pressure high-power concentration treatment, salt separation treatment and evaporative crystallization. Wherein the forward osmosis low-pressure high-power concentration treatment is performed in a partitioned manner along the flow direction, the osmotic pressure difference is gradually increased, the transmembrane pressure difference is gradually decreased, and interface electrochemical buffer and low-frequency gas-liquid disturbance can be set to inhibit concentration polarization and pollution. Carrying out nanofiltration and salt separation on the concentrated solution to obtain two paths of saline water mainly comprising Na2SO4 and NaCl, and respectively carrying out evaporative crystallization on the two paths of saline water; and refluxing and reusing the water produced by the draw solution. According to the process, high-power concentration and stable salt separation are realized under low mechanical pressure, the energy consumption is reduced, the water recovery rate and the crystal purity are improved, and zero discharge of wastewater is realized.

The invention relates to the technical field of material performance testing, and discloses a multi-parameter simulation salt spray environment test system and method, and the system comprises a multi-parameter cooperative control module, a bionic fog drop generation and salt spray adjustment module, an energy recovery and resource circulation module, a salt spray environment adaptive compensation module, and a test data intelligent analysis module. The modules are in closed-loop communication through an industrial Ethernet; the method comprises the steps of test preparation, model initialization, dynamic simulation and compensation, energy resource circulation and data processing ending, specifically, a salt mist concentration-temperature-humidity-wind speed coupling model is constructed, uniform salt mist is generated through bionic atomization and electrostatic adsorption, self-adaptive compensation is achieved in combination with partition sensing and corrosion current detection, and the salt mist concentration-temperature-humidity-wind speed coupling model is obtained. And heat is recovered, and condensate water and non-atomized saline water are recycled. The problems of multi-parameter coupling interference, resource waste and low data value in the prior art are solved, the simulation precision and the resource utilization rate are improved, and the method is suitable for multi-field material corrosion resistance testing.

The invention provides an implementation method for strengthening freezing and monitoring in a shield butt joint freezing weak area, and relates to the technical field of shield butt joint engineering.The implementation method comprises the steps that the thickness of a freezing wall is determined, configuration parameters of freezing holes are determined according to the stratum freezing development rate, and the configuration parameters of the freezing holes are combined with excavation constraint conditions of an excavation area and the configuration parameters of the freezing holes; based on the arrangement parameters of the temperature measuring holes in the butt joint area, temperature measuring points are arranged in the temperature measuring holes in the butt joint area; temperature measuring lines and annular temperature measuring points are arranged to collect the temperature of the area between the slurry bin and the shield shell and the temperature of the structural face of the shield tunneling machine; and performing monitoring and early warning by using a preset monitoring system, and performing interaction of monitoring and early warning results with a user side. According to the method, partition real-time monitoring design is carried out on the frozen curtain according to the saline freezing reinforcement stratum condition of the shield butt joint project, especially freezing reinforcement design and monitoring design are carried out on the frozen weak area, and the safety of the frozen wall in the butt joint section structure thermal disassembly process is improved.

The invention discloses a fluoride-free strong-acid-free reverse flotation method for extracting a high-purity quartz sand flotation product from granite pegmatite, and belongs to the technical field of mineral flotation. The method comprises the following steps: carrying out graded crushing and ore grinding on granite pegmatite to obtain slurry to be treated; carrying out wet magnetic separation on the to-be-treated slurry to obtain ore pulp after magnetic separation and magnetic-containing minerals; the pH value of the ore pulp is not adjusted, reverse flotation is carried out in the presence of a quartz mixed inhibitor, and a feldspar product and a quartz product are obtained; the quartz mixed inhibitor is a combination of a component A and a component B, wherein the component A is selected from at least one of sodium metasilicate, sodium tripolyphosphate, sodium hexametaphosphate, carboxymethyl cellulose and salinized water glass; the component B is selected from at least one of guar gum, Arabic gum, sodium humate and citric acid. The method is free of fluorine and strong acid, green and efficient, and is a method for preparing high-purity quartz sand from pegmatite with high industrial application feasibility.

The utility model discloses a system for producing sodium carbonate by using carbon dioxide and carbide slag in boiler flue gas, which is characterized in that the boiler flue gas discharged by a coal-fired boiler is purified and then enters a carbonization tower instead of part of lime kiln gas to react with ammoniacal salt water to generate NaHCO3, the NaHCO3 is calcined to generate a final product sodium carbonate, carbon is fixed to the final product, and the emission of CO2 is reduced; and meanwhile, the consumption of CO2 generated by calcining the limestone is reduced, so that the consumption of the limestone and the coke is greatly reduced. Calcium carbide slag generated by a calcium carbide method PVC production device is ground and screened to obtain coarse powder, fine powder and superfine powder, the coarse powder, the fine powder and the superfine powder are mixed in proportion to obtain a calcium carbide slag powder mixture with reasonable grain size distribution, the mixture is used for preparing lime milk, lime milk meeting the ammonia distillation requirement of a sodium carbonate system can be prepared without adding quick lime, the lime milk is used for the ammonia distillation system, and the production cost is reduced. Lime milk notches caused by reduction of lime yield are supplemented, and meanwhile, the utilization value of the solid waste carbide slag is improved.

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 utility model provides a salt soda water bottle capping mechanism which comprises a support, an adjusting plate installed on the support in a lifting mode and a pressing piece installed on the adjusting plate in a rotating mode, a driving motor for driving the pressing piece to rotate is arranged on one side of the adjusting plate, and the pressing piece comprises a pressing cylinder and a piston piece arranged at the upper end of the pressing cylinder. And a plurality of clamping blocks are annularly distributed at the lower end of the pressing cylinder, and the clamping blocks are slidably mounted in sliding grooves corresponding to the pressing cylinder. According to the device, the clamping blocks are annularly distributed in the pressing cylinder, the clamping blocks are provided with the clamping plates in the pressing cylinder, the piston piece controls the clamping blocks to stretch out and draw back, so that the bottle cap is clamped and fixed through the clamping plates, the clamping plates can straighten the bottle cap in the clamping process, the bottle cap is located over a bottle opening, follow-up accurate cap pressing is facilitated, and the situation that the bottle cap is clamped due to inclined placement is avoided. And the telescopic movement of the clamping plates can be suitable for bottle caps of different sizes, and the universality of the equipment is improved.

The application relates to the field of food processing, and particularly discloses a factory high-efficiency oyster shell opening technology for fresh oyster meat and application thereof. The method comprises the steps of removing ropes, drum cleaning, low-temperature blanching for opening shells, cooling and manual meat taking. The application combines the drum cleaning and low-temperature blanching technology of a new oyster special cleaning machine, the oyster surface is cleaned through the new oyster special cleaning machine, and a 1-5mm shell opening effect is formed, then 3-4% salt water at 50-60 DEG C is used for blanching, the closed shell muscle protein is slightly denatured, the shell opening range is expanded to 5-20mm, and finally the meat is taken manually after cooling and stored. Compared with the traditional oyster opening method of directly prying open with an oyster opening knife held in hand, the meat taking speed is increased by more than 86%, the labor intensity is reduced, the hands of workers are prevented from being injured, the freshness and integrity of the oyster meat are ensured, the loss of nutritional components is small, the cost is controllable, and the method is suitable for factory large-scale production of oysters.

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 invention discloses a coal-to-methanol ash water treatment system and an optimization method. The coal-to-methanol ash water treatment system comprises a first water heater, a second water heater, a first flash evaporator, a third water heater and a vacuum flash evaporation device; an inlet of the first water heater is connected with a chilling chamber of the gasification furnace; an inlet of the second water heater is connected with a washing tower of a gasification section; an inlet of the first flash evaporator is connected with an air outlet of the first water heater and an air outlet of the second water heater; an inlet of the third water heater is connected with a liquid outlet of the first water heater and a liquid outlet of the second water heater; and the vacuum flash evaporation device is used for further treating liquid at the bottom of the third water heater. According to the method, the salt in the high-concentration brine can be recycled and converted into a product for resource recycling, so that the problem of hazardous waste treatment of crystalline solids in related technologies is solved, the treatment efficiency is improved, and the treatment cost is reduced.

The utility model discloses an LNG (Liquefied Natural Gas) cold energy saline water ice making device which comprises an LNG gasification system, a cold energy recovery system, an ice making and storing system and an ice unloading system, according to the LNG gasification system, LNG is gasified after exchanging heat with a refrigerant, and the refrigerant is cooled and enters the cold energy recovery system. In the cold energy recovery system, saline water exchanges heat with a low-temperature refrigerant and then is cooled to circularly supply cold to the ice-making and ice-storing system; according to the ice making and storing system, ice making water in an ice mold exchanges heat with low-temperature saline water in an ice making pool to be cooled to form ice blocks, the ice blocks are stored in the ice making pool when the ice does not need to be discharged, and integration of ice making and ice storage is achieved; according to the de-icing system, de-icing is carried out on an ice mold filled with ice blocks through a de-icing pool. According to the utility model, brine ice making is carried out through LNG cold energy, so that energy conservation and consumption reduction are realized, and the ice block quality is improved; the ice maker has the advantages of high automation degree, long service life, small occupied area, low investment cost, high cold energy utilization rate, high ice making efficiency and the like.

The utility model relates to the technical field of vegetable pickling processing discloses a kind of sauce fermentation back-irrigation mechanism, including fermentation tank, the slope is uniformly arranged in the bottom of fermentation tank two sides, and the top of fermentation tank is provided with pressing mechanism, and pressing mechanism includes the U-shaped lifting rod of being arranged in the top of fermentation tank inner wall one side, the both ends of U-shaped lifting rod are slidably sleeved with locating rod, the both ends of U-shaped lifting rod are uniformly provided with the round hole compatible with locating rod, and the top and bottom of two locating rods are fixedly connected with fixed block, and each fixed block is fixedly connected in fermentation tank inner wall, the both ends of U-shaped lifting rod are rotatably sleeved with rotating rod, and the both ends of U-shaped lifting rod are provided with the round hole compatible with rotating rod. The utility model, it has realized the reduction of manual labor intensity, has provided the convenience for feeding and discharging, while automatically pressing vegetables, eliminate the fermentation difference problem caused by vegetable floating or salt water concentration uneven, improve sauce quality stability and consistency.

A system for desalinating water using membrane distillation (MD) integrated with an ejector includes an ejector module and a membrane module. The ejector module includes a water ejector, a first water circulation pump, and a freshwater tank. Freshwater is continuously pumped from the freshwater tank, through the water ejector, and back to the freshwater tank. The membrane module includes a feed tank, a second water circulation pump, a water heater, and a membrane distillation unit. Salt water from the feed tank is pumped through the water heater to form vapor, which is then directed to the membrane distillation unit. The membrane distillation unit comprises a feed chamber, a membrane, and a vapor chamber. Vapor passes through the membrane to the vapor chamber connected to the water ejector. The vapor chamber, under a vacuum, does not include an outlet configured to receive a sweeping gas.

1. Name of the designed product: salt water cleaning liquid bottle (three). 2. Use of the designed product: the designed product is used for salt water cleaning liquid bottle. 3. Design points of the designed product: in shape. 4. Picture or photo that best indicates the design points: front view.

The invention provides salt-resistant soil for drilling fluid as well as a preparation method and application of the salt-resistant soil, and relates to the field of drilling fluid. The salt-resistant soil for the drilling fluid is prepared from the following raw materials in parts by weight: 25 to 30 parts of purified sepiolite, 7 to 20 parts of 2-acrylamido-2-methylpropanesulfonic acid, 7 to 10 parts of N, N-dimethylacrylamide, 9 to 15 parts of a cationic monomer and 1 to 2 parts of an initiator. The invention further provides a preparation method of the salt-resistant soil for the drilling fluid and application of the salt-resistant soil in the water-based drilling fluid. The salt-resistant soil for the drilling fluid provided by the invention can keep a good slurry making rate in fresh water, saturated salt water and composite salt water, has good rheological property and outstanding temperature resistance, is suitable for various drilling fluid systems, is wide in application range, particularly can be used for directly making slurry by using seawater in offshore drilling operation, and has a wide application prospect. And the construction is more convenient in an environment lacking fresh water resources.

The invention provides a method for extracting goose carnosine and / or carnosine. The method comprises the steps of low-salt water extraction and high-salt water extraction under alkaline and heating conditions. The extraction method of the goose carnosine and / or carnosine provided by the invention is simple to operate, low in cost and easy for large-scale industrial use.

A Fresnel spot lens desalinization system includes a Fresnel spot lens (FSL) disposed above a heating element. The heating element has a collector plate and a rod portion; The FSL concentrates solar energy onto the collector plate. A condenser vessel is connected to the collector plate. The rod portion extends into the condenser vessel having a heat resistant exterior shell. The rod portion projects interiorly of the condenser vessel at a downward angle and includes a top portion that is connected to a flat head of the heating element. The flat head receives the solar energy generated from FSL The concentrated solar energy increases the temperature of the heating element inside the condenser vessel to vaporize the salt water to steam and transfer the steam into a condensing tube to condense the steam into pure water.

The application discloses high-performance desert sand foam concrete and a preparation method thereof. The concrete comprises the following components in parts by weight: 70 parts of Portland cement, 30 parts of fly ash, 20-100 parts of desert sand, 25-35 parts of salt water, 0.2-0.5 parts of a foaming agent, 5-12 parts of a composite activator, 5-15 parts of alkali-activated metakaolin composite microbeads and 0.5-2 parts of a roughened PET polymer fiber. The composite activator is composed of calcined phosphogypsum, alkali residue, nano silicon dioxide, silica fume and 5% mass concentration polyvinyl alcohol in a weight ratio of (40-50):(30-40):(10-15):(5-10):(10-15). The alkali-activated metakaolin composite microbeads are composed of fly ash floating beads, metakaolin, water glass, sodium hydroxide and deionized water in a weight ratio of 100:(20-30):(15-25):(3-5):(20-30). The application is particularly suitable for a buffer pressure relief filling layer between primary support and secondary lining in a tunnel engineering, thereby effectively reducing high ground stress and stratum load acting on a tunnel lining structure.

The utility model discloses a deep well hydraulic transmission variable speed hydraulic generator which comprises a liquid supply tank, the interior of the liquid supply tank is divided into a salt water cavity and a fresh water cavity through a partition plate, a salt water pump is fixedly connected to the interior of the salt water cavity, and a fresh water pump is fixedly connected to the interior of the fresh water cavity; the water wheel power generation assembly is arranged in the fresh water cavity and used for transmitting the pressurized hydraulic pressure to the roof for power generation; the interior of the circulation box is divided into a water storage pool, a fresh water pool and a salt water pool through a separation frame, the water storage pool is located above the fresh water pool and the salt water pool, and the input end of the fresh water pump is fixedly connected with a fresh water pipe. By utilizing the principles of deep well hydraulic pressure and transmission speed change, static hydraulic pressure is converted into kinetic energy to be supplied to the generator set for power generation, and the kinetic energy is used as reuse water after backflow, so that the utilization efficiency of energy is greatly improved, the whole device is more environment-friendly and energy-saving, and the problems of electricity and water utilization in communities and the like can be solved.

The invention relates to porous hydrogel based on a photo-thermal material as well as a preparation method and application of the porous hydrogel, and relates to the technical field of hydrogel. The preparation method comprises the following steps: mixing a photo-thermal material with sodium alginate and sodium polyacrylate, adding lauryl sodium sulfate for foaming, and then performing freeze crosslinking and electrostatic self-assembly, thereby obtaining the photo-thermal composite material. The porous hydrogel based on the photo-thermal material prepared by the preparation method provided by the invention can efficiently realize interface evaporation and has excellent salt resistance and antibacterial performance, the pure water evaporation rate can reach 3.03 kg.m <-2 >. H <-1 >, the evaporation rate in 20% saline water is kept at 2.43 kg.m <-2 >. H <-1 >, and after the porous hydrogel is in dynamic contact with escherichia coli for 18 hours, macroscopic bacterial colonies do not exist, and the antibacterial rate reaches 99%; in addition, self-floating can be achieved, cost can be saved in practical application, and a new thought is provided for the interface evaporator for sea water desalination.

The invention discloses a water-based drilling fluid system resistant to a high-concentration mixed saline solution and a preparation method of the water-based drilling fluid system, and belongs to the technical field of drilling fluids. According to the water-based drilling fluid system resistant to the high-concentration mixed saline solution, the influence of cations with different valence states and an underground high-temperature and high-pressure environment on the rheological property, the filtration performance and the like of the drilling fluid is fully considered, and two high-valence cation-resistant drilling fluid filtrate reducers are introduced; the technical problems that a conventional drilling fluid is poor in rheological property, poor in filtrate loss reduction performance, poor in system stability and the like in high-concentration mixed salt water are solved. The system can meet the requirement for rapid drilling of a stratum at the ground temperature of 150 DEG C and the high salt ion concentration, can still keep good capacities of carrying rock, lubricating, blocking and preventing collapse, inhibiting clay hydration and dispersion and the like in a high-concentration mixed salt water solution, does not need precise instruments and equipment, is simple and easy to operate, low in cost and good in economical efficiency, can be prepared and used at any time, and has wide application prospects. The method is suitable for drilling conditions.

The invention belongs to the technical field of sodium hypochlorite preparation, and provides a hydrogen-free sodium hypochlorite preparation system and a sodium hypochlorite preparation technology.The sodium hypochlorite preparation system comprises a brine electrolysis device, and a liquid inlet of the brine electrolysis device communicates with a pipeline mixer through an electrolyte conveying pipeline; a liquid inlet of the pipeline mixer is respectively communicated with a saturated salt water preparation device and a saturated salt water dilution device, a liquid outlet of the salt water electrolysis device is communicated with a sodium hypochlorite storage tank through a sodium hypochlorite conveying pipeline, and a liquid outlet of the sodium hypochlorite storage tank is communicated with a metering and adding device; the brine electrolysis device comprises an air cathode electrolytic cell and a rectification power supply, the air cathode electrolytic cell comprises a cell body, the cell body is provided with a containing cavity for containing electrolyte, and an anode and a cathode which are electrically connected with the rectification power supply are fixedly installed on the cell body. According to the method, the sodium hypochlorite solution is prepared efficiently and safely, no hydrogen is generated in the electrolysis process, the operation safety is remarkably improved, and the method is safer and more environmentally friendly.

The invention discloses a method for flotation separation of lead-zinc-sulfur polymetallic sulfide ore by using high-salt water, which utilizes the foamability of salt ions of the high-salt water and the positive influence of a stable foam layer, does not use a foaming agent in the whole process, and utilizes the natural foamability of the salt ions to carry out carbon roughing, lead roughing, zinc-sulfur floatable roughing and the like. The problem that concentration separation is difficult is solved without using a foaming agent, particularly, floating separation of most carbon in the roughing stage can be completed by using the foaming property of salt ions in the carbon roughing stage without adding any agent, and the agent cost can be remarkably reduced. The zinc-sulfur separation problem of the high-salt-content water is solved by adopting a zinc-sulfur concentrate thickening-fresh water size mixing and regrinding-fresh water separation process which can float zinc-sulfur and the like of the high-salt-content water. Furthermore, a lead rough concentrate thickening-fresh water size mixing and regrinding-fresh water separation process is adopted, mutual content of lead and zinc is sequentially reduced by reducing salt ions, reducing the strong foamability of salt water and weakening the stability of a foam layer, and the quality and recovery rate of main metal are improved.

The utility model relates to a salt water electrolysis device, including jar body (1), stirring device (2), scraping device (3) and filter device (4), jar body top is provided with water inlet (11), exhaust (12) and aeration mouth (19), bottom is provided with drain, inside forms electrolytic cavity (14), cathode sheet (15) and anode sheet (16) set up on the inner wall of jar body, stirring motor (21) sets up at jar body top, stirring shaft (22) upper end and stirring motor's pivot fixed connection, lower end passes through jar body and extends to electrolytic cavity (14) inside. Stirring vane (23) fixed setting is in stirring shaft, scraping device (3) includes mounting ring (31), mounting ring is covered and is set in the outside of stirring shaft, is fixedly connected with stirring shaft through connecting rod (32), is provided with two scraping plates (33) on mounting ring. Filter device (4) sets up at jar body bottom, is used for carrying out the filtration to the salt water after electrolysis. The utility model can improve electrolytic efficiency.

The utility model relates to the technical field of water softening, and discloses a split type electroless softening device which comprises an equipment box, a box door is arranged at the front end of the equipment box, and a pipe orifice is arranged at the bottom end of the equipment box. According to the split type non-electric softening device, in order to better soften raw water, the softening assembly is arranged, when the raw water enters the softening barrel, the raw water can be fully sprayed on a resin filter element in cooperation with a conical structure of a water outlet hopper, so that the hardness of the raw water is reduced, and salt water is discharged into the softening barrel in cooperation with a salt box and a box cover; sodium ions enter the resin filter element from bottom to top, calcium and magnesium ions are replaced, generated sewage is discharged through the sewage pipe, so that the resin filter element can be repeatedly used, saline water can better and quickly enter the resin filter element in cooperation with the conical structure of the conical filter cover, the softening and replacing efficiency is higher, and then raw water can be better softened.

The invention relates to the technical field of brine sewage treatment, and discloses an inferior brine refining preparation method based on oxidation-adsorption coupling, which comprises the following steps: adding an efficient CuO / Al2O3 catalyst according to 0.5-1.5% of the volume of brine under the accurate control of the pH value of 2.5-3.0, and adding sodium chlorite according to the molar ratio of 3: 1-5: 1 to realize the specific deep oxidation of I <->; and carrying out targeted enrichment on the generated I2 by using a high-capacity adsorbent. According to the combined process, the iodine concentration of effluent is stably lower than 0.1 mg / L, and the catalyst can be recycled for more than or equal to 50 times. Comparison data proves that the iodine residue is up to 0.85 mg / L when no catalyst exists, and iodine removal is not thorough due to the fact that the oxidizing agent is insufficient. According to the efficient iodine removal method, the deposition of iodine in the ionic membrane electrolytic bath is fundamentally avoided, the expensive ionic membrane is effectively protected, the service life of the ionic membrane is prolonged by more than 30%, the energy consumption of the system is reduced by about 15%, and the brine recycling efficiency and the economic benefit are remarkably improved.

The invention belongs to the technical field of underground engineering construction and refrigeration, and particularly relates to a cryogenic artificial stratum freezing engineering refrigerant and a preparation method thereof. According to the refrigerant agent, an alcohol-salt water-based solution serves as a main body, a viscosity modifier, a corrosion inhibitor and a scale inhibitor are additionally added, and the alcohol-salt water-based solution is composed of organic acid salt, dihydric alcohol and water. The preparation method comprises the following steps: adding dihydric alcohol into water at normal temperature to form an alcohol-water solution, then adding organic acid salt to obtain an alcohol-salt water-based solution, and finally adding an additive to prepare the refrigerant agent. The refrigerant is wide in raw material source, simple in preparation method, controllable in solution freezing temperature and continuous and stable in cold transmission in a freezing pipe; the refrigerant can meet the freezing requirement of a cryogenic artificial stratum, and is high in adaptability in a complex stratum freezing project.

This application discloses a high-pressure brine-resistant filtration loss reducer and its preparation method, belonging to the field of oil and gas well drilling engineering. Based on the requirements for resistance to complex salts, especially calcium and magnesium, this application optimizes the molecular structure of the high-pressure brine-resistant filtration loss reducer and introduces an acryloylmorpholine monomer, significantly improving its temperature resistance, stability, and salt tolerance. Since the copolymerization reaction of the selected monomer is relatively simple, the polymerization reaction adopts free radical solution polymerization. The prepared filtration loss reducer has achieved good performance in both laboratory and field application evaluations.

The invention discloses a method for making pickled vegetable braised pig knuckles stored at normal temperature, which is characterized by comprising the steps of raw material pretreatment, skin burning, salt water injection pickling, boiling, frying, seasoning adding and steaming, and high-temperature and high-pressure sterilization after packaging, and the salt water injection pickling specifically comprises the following steps: weighing table salt accounting for 2-3% of the weight of the raw materials, dissolving the table salt in water, adding the salt into the water, and uniformly stirring to obtain the pickled vegetable braised pig knuckles; uniformly dispersing and injecting into the raw materials by using a saline injector, putting the raw materials into a refrigeration house with the temperature controlled at 0-4 DEG C, and pickling for 2-4 hours; the seasoning adding and steaming specifically comprises the following steps: the seasoning comprises the following raw materials in percentage by weight: 0.3-0.7% of soy sauce, 0.5-1.0% of white granulated sugar, 0.1-0.2% of monosodium glutamate, 0.1-0.2% of Chinese prickly ash, 0.1-0.2% of anise, 0.5-1.0% of fresh ginger and other spices, the seasoning is uniformly smeared on the surfaces of the raw materials, and then the raw materials are steamed for 5-8 hours with slow fire. According to the process, the flavor and taste of the obtained product can be improved, the product can be stored at normal temperature for 3 months, the taste can be comparable with the taste needing refrigeration or cryopreservation in the market, and the acceptability of consumers is high.

The invention provides a concentration treatment system and method for strong brine, and the concentration treatment system comprises a multi-stage forward osmosis treatment unit which is configured to perform multiple forward osmosis treatment on the strong brine by using a concentration draw solution so as to concentrate the strong brine to obtain concentrated brine and a diluted draw solution; and the multi-stage draw solution cyclic regeneration unit is configured to perform multiple times of concentration treatment on the diluted draw solution produced by the multi-stage forward osmosis treatment unit to obtain a concentrated draw solution, and the concentrated draw solution is provided for the multi-stage forward osmosis treatment unit. Compared with the prior art, the method has the advantages that the forward osmosis technology is adopted, the high-concentration concentrated draw solution is used for conducting concentration treatment on the to-be-treated concentrated salt wastewater, the natural osmotic pressure difference serves as driving force, water in the concentrated salt water can naturally flow into the draw solution, and therefore concentration treatment on the concentrated salt water is achieved; efficient treatment and resource recycling of the strong brine in the iron and steel industry are achieved, pollution of wastewater discharge to the environment is reduced, and the requirement for sustainable development is met.