38results about How to "Reduce hydration" patented technology

The invention discloses a condenser and flue gas waste heat utilization system for an ammonia power plant, which belongs to the technical field of power generation and comprises a condenser, a condensate pump, a circulating water regulating valve, a liquid ammonia regulating valve, an ammonia regulating valve, a primary flue gas heat exchanger, a secondary flue gas heat exchanger, a water collector, a steam extraction heater, a pure ammonia burner, a boiler, an air pre-heater, a chimney and a steam turbine. A condenser and a liquid ammonia evaporator are integrally designed, the condenser comprises a liquid ammonia cooling area and a circulating water cooling area, liquid ammonia gasification cold energy of an ammonia power plant is used for cooling steam exhausted by a low-pressure cylinder of a steam turbine, the heat exchange efficiency is improved, and the load of a cooling tower is reduced; the tail of the pure ammonia boiler is free of dust removal and desulfurization facilities, waste heat of high-temperature and high-humidity flue gas at the outlet of the air pre-heater is used for replacing steam extraction of a steam turbine to heat condensed water and low-temperature ammonia gas, the generating power of a unit can be increased, secondary condensation of the ammonia gas can be prevented, the combustion stability of the ammonia gas can be improved, and meanwhile a large amount of water in the flue gas can be recycled.

The invention belongs to the technical field of removal of CO2 from metallurgical gas, and particularly discloses an energy-saving method for a hydrogen-rich carbon circulating oxygen blast furnace gas decarbonization system, which comprises the following steps: in the process of capturing CO2 in gas by a hydrogen-rich carbon circulating oxygen blast furnace, by utilizing external slag flushing water and heat in the system, steam required by a CO2 regeneration process is greatly reduced, and the CO2 regeneration process is reduced; the high-temperature spray circulating soft water of the compressor of the decarburization system is used for heating the decarburization solution in the regeneration tower, so that steam consumed by regeneration in the decarburization system can be reduced, circulating water consumed by a cooling compressor of an original system can be reduced, the consumption of the circulating water and the power consumption cost of the circulating water are reduced, and the energy consumption of the system is reduced. The latent heat of the increased saturated water can be increased by increasing the exhaust temperature of the compressor, the amount of saturated water entering the decarburization system can be increased by increasing the exhaust pressure of the compressor, the desalted water supplementing amount of the decarburization device can be reduced, and the energy consumption of the current hydrogen-rich carbon circulation oxygen blast furnace gas carbon dioxide trapping process can be greatly reduced.

The invention relates to the technical field of fracturing fluids, and discloses a fracturing fluid and a preparation method thereof.The preparation method comprises the steps that cardanol modified polyurethane, modified silicone rubber, hexadecyl trimethyl ammonium chloride, sodium salicylate and water are added into a reactor and stirred, and the fracturing fluid is obtained after stirring is finished. Wherein the quaternary ammonium salt group can reduce the reservoir damage by reducing the hydration of clay on the surface of shale and inhibiting the expansion and migration of the clay, can still keep stable performance at high temperature, and is beneficial to improving the temperature resistance of the fracturing fluid; wherein polyurethane has good temperature resistance, hydrogel is formed through crosslinking, and the hydrogel can still keep stable at high temperature, so that the temperature resistance of the fracturing fluid can be improved; cardanol in the fracturing fluid has good high temperature resistance, and can maintain the stability and effectiveness of the fracturing fluid under a high temperature condition; the silicon rubber structure contains silicon-oxygen bonds, so that the viscosity of the fracturing fluid can be improved, and meanwhile, the fracturing fluid has good anti-shearing capability in a high-temperature environment.

The invention discloses an additive for inhibiting mud powder in machine-made sand and a preparation method of the additive, and belongs to the technical field of building materials.The additive is prepared from a mud blocking component A, a sacrifice component B and a retarding component C. The mud blocking component A plays a role in neutralizing negative charges on the surfaces of mud powder particles and can separate water from clay, and the sacrifice component B plays a role in retarding the mud powder particles; water adsorbed by the layered structure of the clay is reduced, so that free water in the cement paste is increased, and the water demand of the concrete and the adsorption of the clay powder to an additive are reduced. The molecular structure of the sacrifice component B has the characteristics of short side chain, high acid-ether ratio, high charge density and small molecule, and can be adsorbed and inserted in a layered structure of mud powder more quickly than a conventional polycarboxylic acid water reducing agent, so that the adsorption of the mud powder on the water reducing agent is reduced. The retarding component C can form a complex with calcium ions in a solution, so that precipitation of calcium hydroxide is inhibited, hydration of cement is delayed, plasticity retaining property of concrete is improved, cement particle distribution can be improved, and concrete shrinkage caused by mud powder is reduced.

The invention relates to the technical field of building materials, and discloses an alumino-ferroate cement water reducer and a preparation method thereof. The prepared unsaturated zwitterionic cyclodextrin is polymerized with maleic anhydride and acrylic acid to obtain the alumino-ferroate cement water reducer. The cyclodextrin has a hollow cylindrical stereoscopic structure, which brings a significant steric hindrance effect to the polymer. The sulfonic acid groups on the main chain of the water reducer are anchored on positively charged cement particles to generate strong adsorption. The quaternary ammonium salt cations can be adsorbed on the surface of the negatively charged cement particles, so that the cement particles can achieve a better dispersion effect and the fluidity of the cement paste is improved. The presence of the cyclodextrin side chain and the polyethylene glycol long chain affects the cement hydration process, can effectively weaken the interpenetration between the water reducer molecules and the clay layer, enriches the preparation method of the synthetic alumino-ferroate cement water reducer, and is easy to realize industrial production.

The invention relates to the technical field of calcium silicate boards, and discloses a production method of an environment-friendly light calcium silicate board, the calcium silicate board comprises the following raw materials: fly ash, cement, slaked lime, a reinforcing component, an inorganic modified filler and water; wherein the reinforcing component is bamboo fiber of which the surface is grafted with 1-naphthol-3, 6-sodium disulfonate, and the breaking strength of the calcium silicate board can be effectively improved by utilizing the bamboo fiber and sulfonic acid groups in the reinforcing component; according to the inorganic modified filler, a polymer with a large amount of quaternary ammonium salt and carboxyl groups is inserted between layers of rectorite, so that the compactness of the calcium silicate board is enhanced, and the strength of the calcium silicate board is further improved. Through the synergistic effect of the raw materials, the strength of the calcium silicate board is remarkably improved, so that the service life of the calcium silicate board is prolonged, and the application effect of the calcium silicate board in various fields is effectively improved.

The invention relates to a lithium battery electrolyte and a preparation method and application thereof, in particular to a lithium battery electrolyte, which comprises a lithium salt, a mixed solvent and a diluent, the mixed solvent is composed of methyltrimethoxysilane, zinc trifluoromethanesulfonate and an organic chelating agent, the organic chelating agent is ammonium pyrrolidinedithiocarbamate, S, S ', S', S ', S', S ', S', S ', S', S ', S', S ', S', S ', S', S ', S', S ', S', S ', S', S ', S', S ', S', the solvent is one or more of N, N-dimethylformamide, N, N-dimethylformamide, S, S-ethylenediamine disuccinic acid, hydroxyethyl ethylenediamine triacetic acid and 2-bis (2-hydroxyethyl) amino-2-(hydroxymethyl)-1, 3-propylene glycol. The electrolyte additive can improve the cycling stability and efficiency of the aqueous zinc ion battery by regulating and controlling an electrode / electrolyte interface, stabilizing a zinc anode and improving the overall performance of the battery.

This invention relates to the field of pulverized coal conveying and dust removal technology, specifically to a pulverized coal dust removal method, comprising: S1: Constructing a dust removal system: setting up a dust cover on a conveyor belt, setting up a pressure-reducing chamber on the dust cover, installing wear-resistant baffles at the bottom of the dust cover, and installing a dust curtain inside the dust cover; installing a dust collector at the top of the dust cover; S2: Coal conveying and primary dust removal: starting the conveyor belt to transport coal, the coal falls onto the conveyor belt, and the generated dust-laden gas forms a local high-pressure zone under the obstruction of the dust curtain, causing a portion of the dust-laden gas to undergo primary filtration through the filter components on the pressure-reducing chamber; S3: Secondary dust removal: the remaining dust-laden gas in the dust cover is sucked into the dust collector, the dust-laden gas enters below the liquid surface of the dust collector, causing the pulverized coal particles to settle and form coal slurry, which is then transported outside the dust collector, and the purified gas is discharged through the outlet. This method achieves closed-loop control of the entire process from source dust suppression to end-of-pipe treatment through two-stage synergistic dust removal, improving the dust removal effect.

The present application relates to the technical field of biomedicine, and specifically discloses a sodium alginate embolic particle and its preparation method and application. The preparation method of the sodium alginate embolic particle disclosed in the present application comprises the following steps: dissolution, primary freeze drying, infiltration, cross-linking, secondary freeze drying, crushing and screening, and sterilization; dissolution is: preparing a 1.7-2.3wt% sodium alginate aqueous solution, adding a freeze-drying protective agent, stirring at 55-65°C, and cooling to 0-5°C; infiltration is: infiltrating the sodium alginate sponge obtained by primary freeze drying in a sodium alginate aqueous solution with a mass concentration of 0.1-0.8wt% to reach saturation, and obtaining a sodium alginate infiltrate; cross-linking is: immersing the sodium alginate infiltrate in a cross-linking liquid for cross-linking reaction. Using the technical solution provided by the present application, sodium alginate embolic particles with high porosity, uniform particle size, small average pore size, suitable water absorption, excellent suspension performance, and excellent catheter passing performance can be obtained.

The application provides an anode foil and a preparation method thereof. The preparation method comprises the following steps: providing an unformed foil, wherein the unformed foil comprises an aluminum foil base material and an aluminum powder sintering layer arranged on the surface of the aluminum foil base material; and sequentially performing the following processes on the unformed foil: water boiling, first-stage chemical conversion, second-stage chemical conversion, third-stage chemical conversion, power feeding treatment, fourth-stage chemical conversion, fifth-stage chemical conversion, first-stage heat treatment, first chemical conversion repair, first phosphoric acid treatment, second chemical conversion repair, second-stage heat treatment, third chemical conversion repair and second phosphoric acid treatment. The solutes of the electrolyte of the first-stage chemical conversion, the second-stage chemical conversion and the third-stage chemical conversion comprise citric acid, triammonium citrate, adipic acid, ammonium adipate, salicylic acid, hypophosphite, boric acid and ammonium salt, and the solvent is water. The solutes of the electrolyte of the fourth-stage chemical conversion and the fifth-stage chemical conversion comprise citric acid, triammonium citrate, sebacic acid, ammonium sebacate, salicylic acid, sodium hypophosphite, boric acid and ammonium salt, and the solvent is water. An anode foil prepared by the preparation method has a high specific capacity and a small hydration leakage current.

This invention belongs to the field of industrial solid waste resource utilization technology, and relates to a circulating fluidized bed ash-based cementitious material for road base courses and its preparation method. The raw materials for the road base course cementitious material are composed of the following mass parts: 29-43 parts of circulating fluidized bed ash, 16-27 parts of ground blast furnace slag, 3-6 parts of silica fume, 7-15 parts of P.O42.5 silicate cement, 0.1-0.4 parts of activator, and 27-30 parts of water. The circulating fluidized bed ash is prepared by mixing circulating fluidized bed fly ash and slag in a mass ratio of (2-5):(5-10). This invention effectively alleviates the problems of fast setting time and shrinkage cracking of traditional road base course cementitious materials by utilizing the characteristics of micro-expansion and long hydration time of circulating fluidized bed ash. The advantage of this invention is that it promotes the large-scale utilization of circulating fluidized bed ash and contributes to carbon emission reduction in the road sector.

The utility model discloses a thermal power plant accident water collecting and processing device which comprises a plant rainwater pipe, a plant rainwater header pipe, a rainwater inspection well, branch pipes, a settling zone and a clarifying zone, the plant rainwater branch pipes are distributed at preset positions of a plant, the plant rainwater pipe is connected with the plant rainwater header pipe, the plant rainwater header pipe is connected with the rainwater inspection well, and the settling zone is connected with the settling zone. The rainwater inspection well is connected with the settling zone through a branch pipe, the settling zone is connected with the clarifying zone through a grid, the top elevation of the branch pipe is lower than the bottom elevation of a factory rainwater header pipe, the clarifying zone is provided with a water pump, the water pump is connected with a water pipe, and the water pipe is communicated to a coal yard. The device can quickly and effectively intercept, collect and treat accident wastewater, fire-fighting wastewater and initial rainwater in an accident state of a thermal power plant, prevents the wastewater from being discharged to the environment to pollute a water body, realizes rainwater decontamination and diversion, recycles clarified liquid for dust falling of a coal yard and washing of a coal conveying trestle after the wastewater is collected, precipitated and clarified, saves the water supplementing amount of production water, and reduces the production cost. And enterprise cost is saved.

The invention discloses an anti-alkylation reaction process capable of reducing energy consumption of a benzene tower, which comprises the following steps: in an anti-alkylation reaction system, diisopropylbenzene and triisopropylbenzene generated in an alkylation reactor are subjected to an anti-alkylation reaction with benzene in the anti-alkylation reactor to generate isopropylbenzene, and the feeding weight ratio of the benzene to polyisopropylbenzene introduced into the anti-alkylation reactor is adjusted to 1.14: 1-1.18: 1; benzene and polyisopropylbenzene form a mixed solution, the mixed solution in the anti-alkylation reactor is heated to 179-181 DEG C, the back pressure of an outlet of the anti-alkylation reactor is controlled to be 2.0 MPa, and the weight ratio of benzene in an outlet material of the anti-alkylation reactor is controlled to be 35-38%. According to the anti-alkylation reaction process disclosed by the invention, the energy consumption of the benzene tower can be greatly reduced; meanwhile, the extraction of heavy aromatics is also reduced.

The utility model provides a heat recycling unit of a boiler system, which belongs to the technical field of heat recycling of coal-fired boilers and is structurally characterized in that a slag cooler water inlet pipe and a slag cooler water outlet pipe are arranged in a heat exchange process of a slag cooler; the tail end of the slag cooler water outlet pipe is communicated into the softened water tank; a path of dead steam recoverer water inlet pipe is shunted from the slag cooler water outlet pipe in parallel and is communicated to the tower bottom of the dead steam recoverer; the downstream of the water outlet pipe of the dead steam recoverer at the tower bottom converges and is communicated to a heating station hot water pipe; one deaerator water inlet pipe is shunted from the pipe body of the dead steam recoverer water outlet pipe to be communicated to the deaerator tank top, and the other shunted pipe is communicated to a heating station; the downstream of a condensate outlet pipe at the lower part of the tower body of the dead steam recoverer is communicated to the softened water tank; one branch of the deaerator exhaust pipe is a dead steam inlet pipe communicated to a dead steam recoverer; and the other path is communicated to a silencer. The heat recovery device effectively recovers heat of outlet water of the slag cooler, and energy is saved; the system is flexible to adjust, small in investment, high in recovered heat and high in economic benefit.

The present invention discloses a kind of intelligent response chitosan oligosaccharide-based nanogel and its preparation method, and belongs to the technical field of carrier preparation. The preparation method of a kind of intelligent response chitosan oligosaccharide-based nanogel described in the present invention specifically comprises the following steps: firstly, gelatin nanoparticles are prepared by a two-step desolvation method, and then gelatin-chitosan oligosaccharide-pectin composite nanogel is prepared by a layer-by-layer self-assembly method, and then it is heated in a water bath at 40°C, and the free gelatin dissolved by heating is removed by centrifugation to obtain a hollow nanogel carrier, and after loading the active substance, it is finally sealed with chitosan oligosaccharide to obtain the final chitosan oligosaccharide-based nanogel. The chitosan oligosaccharide-based nanogel provided by the present invention has a wide range of pH responsiveness, and can also realize accurate quantitative loading of active substances by regulating the size of gelatin nanoparticles, and has the advantages of being green, safe and efficient.

The invention discloses a preparation method of a composite admixture for a high-calcium fly ash-based geopolymer. According to the additive, natural tannic acid serves as a raw material, an ATRP initiator is grafted through esterification reaction to prepare a brominated tannic acid macroinitiator (TA-Br), then the brominated tannic acid macroinitiator serves as a core, acrylic acid and polyethylene glycol methyl ether methacrylate are catalyzed to be subjected to ATRP graft copolymerization in a water-alcohol mixed system, and the core-shell structure additive with the tannic acid as the core and polycarboxylic acid as the shell is formed. According to the admixture, the retarding effect of tannic acid and the water reducing effect of polycarboxylic acid are integrated, and the problem that polycarboxylic acid in a high-calcium system is prone to failure is solved. Wherein the tannic acid core firmly adsorbs Ca < 2 + > and delays hydration, and the polycarboxylic acid shell provides high-density dispersion force, so that the problems of high water demand and short coagulation time of the high-calcium fly ash geopolymer are solved synergistically. The additive is green and environment-friendly in raw material, excellent in performance and suitable for a strong-base high-calcium geopolymer environment.

The invention discloses a water recycling control method of a water electrolysis hydrogen production system and the hydrogen production system, and the control method comprises the following steps: after a hydrogen production starting signal is received, closing a first exhaust valve; determining whether the pressure in the hydrogen-water secondary liquid separation tank is greater than a preset pressure threshold value or not, and determining whether the liquid level in the hydrogen-water secondary liquid separation tank is smaller than a first preset liquid level or not; when the pressure in the hydrogen-water secondary liquid separation tank is larger than a preset pressure threshold value and the liquid level in the hydrogen-water secondary liquid separation tank is smaller than a first preset liquid level, a first exhaust valve is opened, so that gas in the hydrogen-water secondary liquid separation tank is exhausted through a back pressure valve, and the pressure built in the hydrogen-water secondary liquid separation tank is used as driving force; and the liquid water is pressed back to the pure water storage tank through the first drain valve. According to the invention, the technical problems of hydrogen escape loss, water resource waste, high energy consumption and system complexity caused by dependence on an external water pump when high-pressure pure water containing dissolved hydrogen separated from the cathode side is recycled in the existing electrolytic hydrogen production technology can be solved.

The invention provides a green preparation process of tapioca sour starch with baking expansibility, and relates to the technical field of food preparation, the process comprises the following steps: (1) preparation of tapioca native starch, (2) fermentation and ultraviolet irradiation, and (3) drying. After the cassava raw starch is prepared, the cassava raw starch is subjected to denaturation treatment in a manner of combining fermentation with ultraviolet radiation, and then the drying process is combined, so that the finally obtained cassava sour starch has the characteristic of good baking expansibility.

This utility model relates to a recovery device, specifically a hydrofluoric acid tail gas recovery device, comprising a recovery tank equipped with a first cooling device. An absorption condenser is connected to the upper end of the recovery tank. The upper part of the recovery tank is connected to a workshop tail gas inlet pipe, an anhydrous hydrofluoric acid pipe, and a demineralized water pipe. The bottom of the recovery tank is connected to the input end of an absorption pump assembly via a first pipeline. The output end of the absorption pump assembly is connected to the upper part of the absorption condenser via a second pipeline. A branch pipeline connected to a hydrofluoric acid storage tank is provided on the second pipeline. This device can effectively improve the recovery and processing capacity, and the recovered hydrofluoric acid can be used as a by-product, increasing economic benefits.

The invention discloses a high-water-quick-setting foaming material for preventing and extinguishing fire and a preparation method thereof. The high-water-quick-setting foaming material comprises a component A, a component B and a component C, the component A consists of sulphoaluminate cement, phosphogypsum, an accelerator A, a retarder and a suspending agent in a mass ratio of 10: (2-4): 0.03: 0.05: 0.05; the component B is prepared from Portland cement, ardealite, an accelerator B, a retarder and a suspending agent in a mass ratio of 10: (1-3): 0.03: 0.05: 0.05; the component C is composed of a foaming agent and a foam stabilizer in a mass ratio of 1: 0.01; the component A, the component B and the component C are respectively mixed with water according to a water-cement ratio of (3-6): 1, and then are mutually mixed to prepare the high-water-quick-setting foaming material. The material not only has dual effects of fire prevention and fire extinguishment, but also has the advantages of high condensation speed, high consolidation capacity, good air leakage stoppage effect and capability of longitudinally stacking and inerting a target fire area, and the fire prevention and extinguishment effect of a mining area is ensured.

The invention provides a preparation method of a gel polymer electrolyte diaphragm, which comprises the following steps: blending two-dimensional polymer carboxylate with a hydrophilic monomer, adding a cross-linking agent and a first initiator into the mixture, and reacting under an illumination condition to obtain a thin film; and dialyzing and soaking the thin film to prepare the gel polymer electrolyte diaphragm. The preparation method of the two-dimensional polymer carboxylate comprises the following steps: carrying out substitution reaction on 3, 5-diaminobenzoic acid and acryloyl chloride to obtain a monomer DBA; p-aminobenzoic acid and acryloyl chloride are subjected to a substitution reaction, and a monomer ADA is obtained; and mixing the monomer DBA with the monomer ADA, adding organic alkali and a second initiator into the mixture, and carrying out polymerization reaction to prepare the two-dimensional polymer carboxylate. The gel polymer electrolyte diaphragm is generated through blending reaction of the synthesized two-dimensional polymer carboxylate and the hydrophilic monomer, stronger ionic interaction is brought by introduction of the two-dimensional polymer carboxylate, and the mechanical property of the diaphragm is improved.

This invention discloses a process for stabilizing the cooling water supply temperature of a blast furnace, relating to the field of blast furnace ironmaking equipment cooling technology. The process includes the following steps: acquiring first and second real-time operating parameters and real-time status parameters of a shared spray water system; determining the smelting load difference between the first and second blast furnaces based on the first, second, and real-time operating parameters and the real-time status parameters; generating a linkage control command when the smelting load difference meets a preset linkage trigger condition; and allocating the number of air coolers in the first and second blast furnaces to operation by adjusting the linkage control valves between the air cooler branch pipes of the first and second blast furnaces according to the linkage control command. This invention relies on the existing shared spray water system, eliminating the need for adding a large number of new spray water devices, and achieving on-demand allocation of cooling capacity only through linkage and minor equipment modifications.

The invention discloses a preparation method and a use method of a concrete surface retarder. The preparation method comprises the following steps: adding xanthan gum into water until the xanthan gum is completely dissolved, adding sodium-based zeolite and strong-acid cation exchange resin, and ultrasonically dispersing uniformly to form an emulsion A; adding hydroxypropyl carrageenan into solvent water, stirring until the hydroxypropyl carrageenan is completely dissolved, adding oxalic acid and dilute sulphuric acid, and uniformly stirring to form a solution B; the emulsion A and the solution B form the concrete surface retarder, and the emulsion A and the solution B are independently stored before use; when the concrete surface retarder is used, the emulsion A and the solution B are sprayed on the surface of concrete twice. By adopting the concrete surface retarder disclosed by the invention, surface retarding of concrete can be effectively realized, the surface retarding etching depth can be effectively controlled, a sagging phenomenon is avoided, a good application effect of the concrete surface retarder is realized, and adverse effects of the concrete surface retarder on a concrete interface are avoided.

The present invention relates to the technical field of flue gas filter materials, and discloses a flue gas filter material for coal-fired power plants and a preparation method thereof. The preparation method comprises the following steps: adding composite MOF, mesoporous γ-alumina, mesoporous ρ-alumina, citric acid, and deionized water into a container and mixing them evenly, adding the mixed slurry into a mold, and vacuum drying to obtain a filter layer A; immersing a polytetrafluoroethylene filter material into a sodium alginate solution, vacuum filtering, taking out, and vacuum drying to obtain a modified polytetrafluoroethylene filter material; immersing the modified polytetrafluoroethylene filter material into a mixed solution of manganese nitrate and cerium nitrate, vacuum filtering, removing, and vacuum drying to obtain a filter layer B; spraying tourmaline particles on the surface of the filter layer B, immersing the sprayed filter layer B into a polytetrafluoroethylene emulsion, taking out, hot pressing and compounding it with a filter layer A coated with a polyimide emulsion, and drying to obtain a flue gas filter material.

The present invention provides a method for recovering cobalt precipitate from the liquid after iron and aluminum removal from copper-cobalt ore. The method comprises: step S1, mixing the liquid after iron and aluminum removal with a first alkaline solution for precipitation reaction, and concentrating and separating the obtained precipitation slurry to obtain a cobalt precipitation overflow and a cobalt precipitation underflow; step S2, dividing the underflow into two parts, adding a second alkaline solution to the first underflow for activation and conversion, returning the obtained activated ore slurry to step S1 to replace the first alkaline solution, and filtering and washing the second underflow; step S3, mixing the first cobalt precipitation overflow with the first alkaline solution, and performing precipitation reaction, concentrating and separating the precipitation slurry obtained by the precipitation reaction to obtain a cobalt precipitation underflow; step S4, dividing the cobalt precipitation underflow into two parts, adding a third alkaline solution to the first underflow for activation and conversion, returning the obtained activated ore slurry to step S3 to replace the first alkaline solution, and filtering and washing the second underflow. The product has large particle size and low water content.

The present invention provides a high-temperature anti-channeling fluid loss agent and a preparation method thereof. The components of the high-temperature anti-channeling fluid loss agent include the following raw materials in parts by weight: 60-90 parts of a comonomer, 1-2 parts of an initiator, and 90-110 parts of deionized water. In the present invention, the copolymer molecule contains a relatively large amount of chalcone, which enables it to have a strong ability to chelate metal ions, and generates a stable water-soluble cyclic structure through reaction and chelation, which can effectively delay the cement hydration process and prolong the cement slurry thickening time. The introduction of acrylamide improves the static gel strength of the cement slurry, and the introduction of dimethyl acrylamide into the polymer instead of a part of acrylamide improves the high temperature resistance of the fluid loss agent. 2-2-Acrylamide methylpropane sulfonic acid and N-vinyl pyrrolidone further improve the high temperature resistance and anti-channeling performance of the fluid loss agent.

This invention relates to the field of membrane separation process control technology, and provides a full-membrane method for concentrating and purifying iron phosphate by makeup water reuse regulation. The system includes a white material tank, a pre-concentration and washing unit, an intermediate white material storage tank, a washing and concentration unit, and a purified white material storage tank connected in sequence. It also includes a white material analysis module that uses solid content uniformity as a prerequisite check combined with conductivity distribution characteristics to determine the membrane inlet status into four types: normal material inlet, abnormal material flow, localized abnormal mixing, or overall high salt load. A membrane segment evaluation module assesses the effectiveness of makeup water using both desalination release degree and filtration impedance as dual indicators. Based on this, a tiered decision-making module determines the average makeup water strategy for the entire membrane segment or localized makeup water strategies and allocates makeup water to different membrane segments based on effectiveness. This system, through the coordinated control of accurate membrane inlet status identification and quantitative assessment of makeup water effectiveness, significantly reduces energy waste and concentration load caused by ineffective makeup water.

The present invention relates to a steam-injected blast furnace slag flushing water waste heat recovery device, comprising an evaporator, a main condenser, two main injectors, an auxiliary condenser, an auxiliary injector, a blast furnace slag flushing water tank, a heating water tank, a blast furnace slag flushing water inlet pipe, a heating water inlet pipe, a steam inlet pipe and a non-condensable gas discharge pipe, wherein the top of the evaporator is fixedly connected to the blast furnace slag flushing water inlet pipe, and the bottom of the evaporator is fixedly connected to the top of the blast furnace slag flushing water tank. The present invention generates negative pressure through high-speed steam injection, so that the blast furnace slag flushing water evaporates steam, and the blast furnace slag flushing water after cooling is sent back to the blast furnace for circulating slag flushing, and the heat of the steam is transferred to the heating water for heating urban residential buildings. The present invention recovers the waste heat of the blast furnace slag flushing water, reduces the water replenishment amount of the original slag flushing water circulation system, stops the operation of the blast furnace slag flushing water cooling tower and cooling fan, reduces power consumption, and saves energy and water for the process system.

The invention belongs to the technical field of steel-making cooling water supply, provides a carbon steel continuous casting filter backwashing water treatment and recycling system and a use method thereof, and aims at treating multi-medium filter backwashing water of a carbon steel continuous casting turbid circulating water treatment system, so that the water quality of the backwashing water reaches the recycling standard, the backwashing water is recycled, and waste is turned into wealth. The treatment load of a downstream water treatment process is reduced, and the difficulty of water treatment is reduced; the water quality of downstream sewage is not too complex, the treatment is relatively simple, and the water treatment cost is reduced; the water balance of the small circulating system of the steelmaking cooling water is maintained, the water supplementing amount is reduced, the consumption of new water is reduced, the water taking cost is saved, fluorine ions in the water body are reduced, and the environment is protected.