502results about How to "Reduce water consumption" patented technology

The invention discloses a coal mine dust diffusion simulation and control method based on artificial intelligence, and relates to the technical field of coal mine dust diffusion simulation and control, and the method comprises the following steps: collecting environmental data such as dust concentration, ventilation flow velocity, temperature, humidity and equipment operation state through a monitoring system in a coal mine; and cleaning and formatting processing are carried out in combination with historical working condition data. According to the method, reinforcement learning and virtual extreme scene simulation are utilized, the recognition and emergency response capability of the system to edge working conditions is improved, dust diffusion and explosion risks are effectively reduced, and mine safety is guaranteed. By dynamically adjusting the ventilation and water spraying system, efficient utilization of resources is achieved, energy consumption and operation cost are reduced, and the service life of equipment is prolonged. The system has an adaptive learning capability, can optimize a control strategy according to monitoring data and historical events, can automatically adjust even if the environment changes, improves robustness and flexibility, and reduces manual intervention.

The invention discloses an integrated dedusting-cooling system and method for a high-temperature mining working face of a mine. The integrated dedusting-cooling system comprises a sensor monitoring device, a fuzzy PID control device and a dedusting-cooling device, after the compressed air injection unit of the dust removal and cooling device sucks high-temperature dust-containing airflow in the environment into the system, primary dust removal is performed in the humidification and growth unit firstly, then cold fog cooling and secondary dust removal are performed in the cold fog dust removal unit, and finally airflow purification and tertiary dust removal are performed in the dust filtration and fog dissipation unit. In addition, the sensor monitoring device is adopted to collect environmental monitoring data in real time and feed back the environmental monitoring data to the fuzzy PID control device for processing, when any monitoring data deviates from the environmental parameters set by the system, the working condition of the dust removal and cooling device can be adaptively regulated and controlled, and then continuous dust removal and cooling are conducted on the high-temperature mining working face under different environmental parameters. And efficient cooperative treatment of dust and heat damage on the high-temperature mining working face of the mine is realized. The device has the advantages of being small in dust escape amount, high in dust removal-cooling efficiency and low in energy consumption.

The invention relates to the field of recycled concrete, and discloses a high-strength recycled concrete formula and a preparation method thereof, the high-strength recycled concrete formula comprises the following raw materials by weight: 180-240 parts of cement, 600-800 parts of hydrophobic modified recycled coarse aggregate, 180-280 parts of recycled fine aggregate, 400-600 parts of sand, 300-500 parts of fly ash, 60-120 parts of silica fume, and 20-30 parts of a water reducer, the modified waste rubber powder is prepared from, by weight, 25-35 parts of modified waste rubber powder, 10-40 parts of polyethylene wax, 2-4 parts of m-phenylenediamine and 12-16 parts of tetramethyl orthosilicate. In the invention, by using a large amount of recycled aggregate (coarse aggregate and fine aggregate), the exploitation of new natural resources is effectively reduced, the reutilization rate of building wastes is improved, and by optimizing the proportion and adding a plurality of modifiers (such as silica fume, fly ash, modified waste rubber powder and the like), the mechanical properties such as compression resistance, fracture resistance and the like of the concrete are remarkably improved; by adding the hydrophobic modified recycled coarse aggregate and the penetrant, the impermeability and durability of the concrete are enhanced, so that the performance and the application range of the recycled concrete are improved.

The invention belongs to the technical field of fireproof materials, and particularly relates to a non-intumescent fireproof coating for a fiber reinforced composite material as well as a preparation method and application of the non-intumescent fireproof coating. A binder in preparation raw materials of the non-intumescent fire retardant coating comprises metakaolin, fly ash, CA80 high-alumina cement and an exciting agent, or comprises metakaolin, fly ash, CA80 high-alumina cement, an exciting agent and an organic matter binder, the organic matter binder comprises redispersible latex powder and / or polyvinyl alcohol powder, and the organic matter binder comprises silica powder and / or silica powder. The heat insulation filler comprises expanded vermiculite, hydrophobic modified expanded perlite, sepiolite and hollow glass beads, the flame retardant comprises aluminum hydroxide and magnesium hydroxide, the fibers comprise glass fibers, and the auxiliaries comprise a foaming agent, a thickening agent, a foam stabilizer and an acrylic emulsion. The formed coating has the advantages of low carbon, low cost, excellent heat insulation performance and high-temperature strength, can be applied as a fire retardant coating of a fiber reinforced plastic (FRP), and can effectively protect an FRP reinforcing system.

The invention belongs to the technical field of functional sugar, and particularly relates to resistant dextrin with high dietary fiber content and a preparation method thereof. The preparation method comprises the following steps: mixing pea starch milk and liquefying enzyme, and liquefying to obtain liquefied liquid; the DE value of the liquefied liquid is 8-11%; carrying out molecular rearrangement reaction on the liquefied liquid under an acidic condition to obtain resistant dextrin; the mass content of dietary fibers in the resistant dextrin is greater than or equal to 93%. The pea starch is used as the raw material, the dextrin crude product feed liquid (liquefied liquid) with the appropriate DE value is easily obtained after liquefaction, the DE value of the liquefied liquid is controlled to be 8-11%, and the prepared resistant dextrin is high in dietary fiber content and good in digestion resistance.

The invention discloses a hybrid pumped storage scheduling method for reducing the operation water consumption rate of cascade hydropower stations, which comprises the following steps: establishing a cascade water-light-storage complementary power generation scheduling model, and constructing a target function with the minimum total water consumption of the cascade hydropower stations based on the cascade hydropower scheduling model; determining an objective function constraint condition according to the cascade hydropower dispatching model; establishing a solving model on the basis of an Actor-Critic algorithm; time sequence data in the historical data set is used as environment state parameters to be input into the deep reinforcement learning algorithm model, and an optimal day-ahead scheduling strategy is solved through an iterative training network model; and calculating the water consumption rate by using the obtained optimal scheduling strategy result, and evaluating the result. By introducing an Actor-Critic algorithm in deep reinforcement learning, an optimization decision strategy in a complex environment is realized, the economic operation efficiency and the power generation benefit of the system are effectively improved, and the water consumption rate of cascade hydropower is remarkably reduced.

The invention discloses a method for preparing cellobiose and comprehensively utilizing a by-product of cellobiose. The method is characterized by specifically comprising the following steps: (1) dilution, (2) enzymolysis, (3) flocculation and carbon explosion, (4) decoloration, (5) continuous ion exchange, (6) evaporation and concentration, (7) simulated moving bed chromatographic separation, (8) concentration, (9) finished product preparation and (10) raffinate utilization. The method effectively solves the problems of low preparation purity and high production cost of cellobiose.

The invention relates to the technical field of comprehensive treatment of industrial solid wastes, and particularly discloses a comprehensive utilization method of secondary aluminum ash, which specifically comprises the following steps: deoxidizing the secondary aluminum ash; carrying out hydrolysis treatment on the deoxidized secondary aluminum ash, and carrying out solid-liquid separation to obtain mixed gas, a hydrolysis slurry solid phase and high-salt-alkali ammonia nitrogen hydrolysate; separating and purifying the mixed gas to obtain hydrogen; carrying out at least two times of acid washing treatment and at least one time of alkali washing treatment on the hydrolyzed slurry solid phase to obtain a solid phase product for the concrete admixture; and carrying out ammonia-nitrogen separation on the high-salt-alkali ammonia-nitrogen hydrolysate, and carrying out gradient acidification treatment to obtain aluminum hydroxide and inorganic salt crystals. By implementing the method, high-added-value overall utilization of the secondary aluminum ash can be realized.

In order to achieve the purpose, the multi-stage pulping machine adopts the following technical scheme that the multi-stage pulping machine comprises a rack, an upper cover, a grinding device and a power part are installed on the rack, and a hopper is arranged on the upper cover. According to the multi-stage pulping machine and the cleaning device thereof, soybean milk liquid obtained after third-stage grinding and bean dregs obtained after first-stage grinding are mixed through the second residue-liquid mixing chamber and then fed into the second-stage grinding device, feeding liquid in the third-stage grinding device is purified water, but the bean dregs are bean dregs obtained after three-stage grinding, so that the soybean milk liquid and the bean dregs are mixed uniformly, and the cleaning efficiency is improved. After the soybean milk with the lower concentration is mixed with the bean dregs, grease adhered to the bean dregs after the first-stage grinding is reduced, so that the situation that the second-stage grinding effect of the bean dregs is influenced due to excessive grease adhered to the bean dregs is avoided; meanwhile, the soybean milk subjected to third-stage grinding can be concentrated to obtain soybean milk with higher nutritional ingredients, and the grinding effect is improved.

The invention belongs to the technical field of graphene material preparation, and particularly relates to a universal electrochemical preparation method of covalent functionalized graphene (CFG), which comprises the following steps: (1) in an oil seal state of light sealing oil, performing electrochemical intercalation treatment on a graphite electrode by using concentrated sulfuric acid; (2) after intercalation is completed, light sealing oil is injected into the electrolytic bath while concentrated sulfuric acid is discharged; (3) in the electrolytic bath, constructing a micro-liquid membrane reaction zone by using density and intermiscibility differences of three working liquids, namely light sealing oil, aqueous electrolyte and heavy sealing oil, and enabling the micro-liquid membrane reaction zone to be in contact with the intercalated graphite electrode to generate electrochemical oxidation to generate CFG; (4) controlling the micro-liquid membrane reaction area to directionally move relative to the intercalated graphite electrode, so that the whole intercalated graphite electrode is gradually and completely converted into CFG; and (5) putting the CFG structure after the reaction into a solvent, carrying out mechanical stripping to prepare a dispersion liquid of CFG, and drying to obtain CFG powder.

The utility model discloses a dilute ammonia water concentration device which comprises a stripping tower, a stripping tower condenser positioned at the top of the stripping tower and communicated with the stripping tower, and an absorption tower connected with the stripping tower condenser, the stripping tower condenser comprises a gas phase outlet arranged at the top and a liquid phase outlet arranged at the bottom, the liquid-phase outlet is connected with a liquid-phase inlet in the upper part of the absorption tower through a pipeline; and a gas phase outlet at the top of the stripping tower condenser is connected with a gas phase inlet at the lower part of the absorption tower sequentially through a vacuum buffer tank and a vacuum pump by virtue of a pipeline. The device is short in process, simple in equipment structure, green, energy-saving, safe, environment-friendly and wide in practicability; the height difference between the outlet of the condenser of the stripping tower and the inlet of the absorbent of the absorption tower is utilized, so that the absorbent can flow into the absorption tower from the condenser through gravity flow, the arrangement of a pump is reduced, and the total energy consumption is reduced.

The invention discloses a method for preparing a core-shell structure phase hydrorefining catalyst, comprising the following contents: (1) gelling, aging and filtering a first precipitant, a sodium molybdate solution and a solution containing Ni and Si to obtain a filter cake of a first slurry, and then treating it with a mixed aqueous solution of aluminum salt and organic alcohol to obtain a mixed slurry; (2) adding a Ni-containing solution, a sodium tungstate solution, a second precipitant and the mixed slurry obtained in step (1) to a reactor containing water and an oily liquid to gel and age them to generate a second slurry; (3) filtering, drying and molding the slurry to obtain a molded product; (4) soaking the molded product in an organic acid solution, and desalting the soaked molded product to obtain a catalyst. The preparation process of the method is clean and pollution-free, and the prepared catalyst has a core-shell structure, a large pore volume and a large pore size, and is used in processes such as distillate hydrodesulfurization and denitrogenation, and has high hydrodesulfurization and hydrodenitrogenation reaction performance.

The invention relates to the technical field of cleaning equipment, and discloses a wild jujube cleaning machine which comprises a treatment box which serves as a basic component of the whole device and is used for assembling and bearing all treatment mechanisms and subordinate structural parts of the treatment mechanisms. The partition seat is fixedly connected to the middle of the inner side of the treatment box and used for dividing the space of the upper and lower parts of the inner side of the treatment box into an arc-shaped cavity, a sorting cavity and a collecting cavity; and the attachment and separation mechanism is used for carrying out separation treatment on soil, dust and other impurities attached to the wild jujubes fed into the equipment. By adding and arranging the gas-liquid mixed washing mechanism, when the wild jujubes treated by the attachment and separation mechanism are washed, the wild jujubes are washed in a gas-liquid mixed mode, water resource consumption in the wild jujube washing process can be effectively reduced, and a large amount of water cost can be saved for enterprises; in addition, by reasonably controlling the switching frequency and pressure of water and air, a good cleaning effect can be achieved under low water pressure.

The utility model relates to the technical field of energy recycling, and discloses a combined utilization device for waste heat and waste gas of an alkaline electrolytic cell for wind-solar power generation and hydrogen production, which comprises a hydrogen production unit, and an oxygen separation unit and a hydrogen separation unit are sequentially arranged on the right side of the hydrogen production unit from left to right. A primary oxygen conveying pipe is communicated between the hydrogen production unit and the oxygen separation unit, a primary hydrogen conveying pipe is communicated between the hydrogen production unit and the hydrogen separation unit, and an alkali liquor recovery assembly is arranged between the bottom of the hydrogen separation unit and the bottom of the oxygen separation unit; and a combustion chamber is arranged on the rear side of the hydrogen separation unit. According to the utility model, the hydrogen production loss is reduced by utilizing unqualified hydrogen in the start-up stage; secondly, heat generated during operation of hydrogen production equipment and combustion of waste gas is used for drying and heat supply in the whole hydrogen production process; and when heat is sufficient, the steam turbine can be used for self-generating electricity, municipal electricity consumption of a factory is reduced, and municipal electricity cost is reduced.

The invention discloses a dust filtering system for bridge engineering construction and a filtering method.The dust filtering system comprises an air draft device, an aeration dust removal device and a waste water precipitation device, the waste water precipitation device comprises a plurality of precipitation units, the aeration dust removal device is connected with a drainage channel, the drainage channel is communicated with the precipitation units, and the precipitation units are communicated with the aeration dust removal device. A buoyancy opening and closing mechanism is arranged in each precipitation unit and can close a drainage channel where the precipitation unit is located after the precipitation unit is filled with wastewater and open a water inlet of the adjacent precipitation unit at the same time; a plurality of water outlets are further formed in the two sides of the precipitation unit, and each water outlet is provided with a floating ball normally-closed switch which is used for opening the water outlet when the liquid level descends; the water outlets in the two sides of the precipitation unit are sequentially and alternately arranged in the vertical direction. According to the invention, the problem of slow filtration of traditional precipitation type wastewater is solved, so that the treatment efficiency of dust filtration is improved.

The invention relates to the technical field of building materials, and provides a special high-temperature-resistant high-strength grouting material for steel mills, which is prepared from the following raw materials in parts by weight: 40 to 45 parts of cement, 35 to 45 parts of aggregate, 4 to 8 parts of active mineral admixture, 0.2 to 0.5 part of early strength agent, 0.05 to 0.1 part of retarder, 0.03 to 0.04 part of plastic expanding agent, 0.3 to 0.5 part of water reducing agent, 0.05 to 0.07 part of defoaming agent, 0.02 to 0.05 part of preservative and 0.2 to 0.25 part of fiber. The fibers comprise modified carbon fibers, the modified carbon fibers are obtained by modifying carbon fibers through a modifier, and the modifier is a naphthylamine sulfonic acid compound. According to the technical scheme, the problems of low compressive strength and low high-temperature resistance of the grouting material in the prior art are solved.

The invention provides a foam dust suppression material as well as a preparation method and application thereof. The foam dust suppression material comprises a foaming agent, a surfactant, a thickening agent, inorganic salt and a solvent; wherein the foaming agent comprises soybean protein isolate and / or collagen; the surfactant comprises an anionic surfactant and / or a nonionic surfactant; the inorganic salt comprises one or more of potassium sulfate, magnesium chloride, sodium sulfate and sodium chloride. According to the foam dust suppression material, specific components are adopted, all the components cooperate with one another, and the dust suppression material is high in foaming rate, good in stability, good in dust suppression effect, environmentally friendly, non-toxic to the human body, capable of protecting the health of workers and improving the comfort level of the working environment, low in cost and good in economic benefit and social benefit.

The invention relates to the technical field of telegraph pole production equipment, in particular to an anti-seismic concrete telegraph pole spraying maintenance device and a maintenance method thereof.The anti-seismic concrete telegraph pole spraying maintenance device comprises a supporting frame, a sliding part is arranged on the supporting frame in a sliding mode, and a spraying mechanism used for conducting spraying maintenance on a telegraph pole body is arranged below the sliding part; the spraying mechanism comprises an arc-shaped spraying shell, a water storage tank arranged on the arc-shaped spraying shell and a collecting box arranged below the arc-shaped spraying shell and used for collecting spraying liquid obtained after spraying. Through mutual cooperation of the arc-shaped spraying shell, the water storage tank, the collecting box and the water pump, primary collection and utilization of spraying liquid can be achieved, so that control over the spraying water amount is greatly reduced in the telegraph pole spraying maintenance process, and waste of water resources is effectively reduced.

The invention relates to the technical field of faucet structures, and discloses a double-outlet water-saving faucet which comprises a tap water pipe, one end of the tap water pipe is connected with a primary filtering barrel, and the primary filtering barrel is used for filtering and collecting some solid particles in water; the top of the primary filtering barrel is connected with a water outlet pipe, and a water-saving mechanism is arranged at one end of the front surface of the water outlet pipe and used for automatically closing and cutting off water flow; an ultrafiltration membrane is arranged in the water outlet pipe and used for filtering bacteria, viruses and heavy metal, when the ball valve is in a closed state and the through hole in the valve element and the through hole in the valve shell are in a communicated state, tap water is squeezed out due to the pressure of the tap water, impurities intercepted on the surface of the ultrafiltration membrane can be washed away when the tap water passes through the ultrafiltration membrane, and therefore the water quality is improved. The problem that the filtering efficiency of an ultrafiltration membrane is reduced and the water yield of purified water is reduced due to blockage caused by too many intercepted impurities is solved.

The invention discloses bio-based antibacterial powder for textile coloring, the bio-based antibacterial powder is a nano colored particle with a core-shell structure, which takes a natural coloring agent as a core and a polymer polymerized by a bio-based antibacterial monomer, a polymer monomer, a silicon modified monomer and a dispersing agent as a shell, and the mass ratio of the core to the shell is 1: (1-3). The invention further discloses a preparation method and application of the bio-based antibacterial powder for textile coloring, the coloring agent and the dispersing agent are used as water phases, the polymeric monomer is used as an oil phase to prepare dispersion liquid of the nano coloring particles, and the bio-based antibacterial powder is prepared by adopting a spray drying method. Compared with a traditional antibacterial agent, the antibacterial powder coating has the advantages of being low in storage and transportation cost, good in durability and excellent in hand feeling and breathability, no other auxiliaries are needed in a system, and the antibacterial powder coating has the advantage of being low in water consumption. The antibacterial powder disclosed by the invention can also be applied to antibacterial finishing of other flexible base materials or rigid base materials, such as MDF plates, automotive interiors and the like.

The invention relates to the technical field of dredged soil curing agents, in particular to a dredged soil pneumatic mixed flow curing agent and a preparation method thereof. The dredged soil pneumatic mixed flow curing agent is prepared from the following raw materials in parts by weight: 20 to 50 parts of cement, 10 to 40 parts of fly ash, 10 to 40 parts of mineral powder, 20 to 50 parts of quick lime, 0.01 to 0.1 part of retarder, 0.01 to 0.05 part of flocculant, 0.005 to 0.01 part of silane coupling agent and 0.1 to 0.3 part of hydrophobic adsorption type admixture. The hydrophobic adsorption type admixture, the silane coupling agent and the flocculating agent are doped into the curing agent raw materials at the same time and have a synergistic enhancement effect, so that the cohesiveness and the pumpability of curing agent slurry can be remarkably improved, the adaptability of the curing agent slurry and dredged soil in a pneumatic mixed flow process can be enhanced, the sensitivity to the water content of the dredged soil is reduced, and the curing agent has the advantages of being simple in preparation process and low in cost. The solidified soil is relatively stable in later-stage reinforcement, the solidifying agent is used in dredged soil pneumatic mixed-flow solidification production, the pumping constructability, the dispersion resistance in water and the hardening performance of the solidified soil can be remarkably improved, and the solidifying agent is suitable for filling projects such as sea reclamation and backfilling.

The invention belongs to the technical field of daily chemical products, and particularly relates to a granular composition with easy-to-flush, soothing and oil-controlling effects and application. The granular composition is prepared from the following components in parts by weight: 21 to 73 parts of a composite surfactant, 2.1 to 21 parts of a humectant, 1 to 4.9 parts of a soothing component, 10 to 20 parts of a filling agent, 1 to 5 parts of an anti-caking agent and 0.1 to 1 part of a thickening agent, the composite surfactant is a compound of distearyl dimethyl ammonium chloride, C14-16 sodium olefin sulfonate, sodium cocoyl isethionate and sodium lauroyl glutamate. According to the invention, a specific composite surfactant is matched with other components to develop the solid washing and caring particle, the solid washing and caring particle can play multiple soothing and cleaning effects, can effectively reduce the use requirements of preservatives, ensures the long-term stability and use effect of the product, is easy to rinse, free of residues, easy to transport or carry, and has a good application prospect. The liquid shampoo can be widely applied to personal care products for washing hair, face or bathing and the like.

The water purifying and drinking machine comprises a water outlet assembly, the water outlet assembly comprises a water-vapor separation box, the water-vapor separation box is provided with a water-vapor separation cavity, a water inlet, a water outlet and an exhaust port, the water inlet, the water outlet and the exhaust port are communicated with the water-vapor separation cavity, and a main flow channel is formed between the water inlet and the water outlet. Convex ribs which extend upwards and are distributed on the two sides of the main flow channel are arranged on the bottom face of the water vapor separation cavity, and the convex ribs located on one side of the main flow channel form a plurality of continuous rectification channels communicated with the main flow channel. The rectification channels arranged along the two sides of the main flow channel are arranged in the water-vapor separation cavity, one part of water entering from the water inlet flows to the water outlet along the main flow channel, and the other part of water advances along the rectification channels and converges with water flow of the main flow channel, so that the water flow cannot directly flush the water outlet in a large area, and the flow speed of the water flow tends to be stable; the water type of the water flow discharged from the water outlet is optimized, the attractiveness is improved, and the water drop splashing phenomenon is reduced.

The invention relates to an all-substance recycling method for preparing high-quality cryolite by using a waste electrolyte alkaline process, which adopts CO2 to adjust the pH value of a leaching solution and realizes the recovery of all substances of fluorine, aluminum and sodium in the electrolyte. Sodium hydroxide is recycled through causticization reaction, so that the production cost is reduced. Calcium oxide and carbon dioxide are recycled through a calcium carbonate calcining method, and recycling of all substances is achieved. The method solves the problems that in the prior art, a large amount of hydrogen fluoride harmful gas is generated in the acid leaching process, and the content of impurity elements in leachate is high, the prepared cryolite product is high in purity, and the cryolite yield and the cryolite molecule ratio are high by taking fluorine, aluminum and sodium elements as references.

The utility model discloses a leather surface cleaning device, and relates to the field of leather manufacturing. The leather cleaning device comprises a device main body, a filter screen is arranged in the device main body, a motor is arranged above one side of the device main body, and the output end of the motor is connected with a reciprocating screw rod. The leather cleaning device has the advantages that the leather cleaning device is simple in structure and convenient to use, accordingly, clamping plates clamp and fix the two sides of leather, workers rotate first screws to enable a set of fixing frames to move, the leather is stretched, the tensile force of the leather is improved, a motor rotates to enable a reciprocating lead screw to rotate, a threaded sleeve is moved after the reciprocating lead screw rotates, and then a fixing column drives a cleaning frame to move left and right; in the moving process, the scraping plate can scrape away intractable impurities on the leather, and the first cleaning brush moves to repeatedly brush the leather.

The invention relates to the technical field of building materials, and particularly discloses high-strength premixed pervious concrete for a surface layer and a preparation method of the high-strength premixed pervious concrete. The invention relates to high-strength premixed pervious concrete for a surface layer. The concrete comprises the following components in parts by weight: 220 to 300 parts of cement, 1570 to 1720 parts of double-graded broken stone, 85 to 120 parts of water, 50 to 100 parts of mineral powder, 18 to 35 parts of anhydrite, 4 to 10 parts of soluble sulfate, 0 to 50 parts of silica fume, 0 to 50 parts of fly ash of 1000 meshes, 20 to 35 parts of quartz stone fine sand of 80 to 120 meshes, 1 to 2.5 parts of a composite water reducing agent, 0.4 to 2.4 parts of a viscosity modifier, 6 to 10 parts of wollastonite fiber powder and 0.4 to 1 part of a defoaming agent. The composite water reducing agent comprises an ether polycarboxylic acid water reducing agent and an ester polycarboxylic acid water reducing agent. The composition and proportion of the concrete are designed and adjusted, so that the concrete has a good construction effect under the premixing condition.

The utility model discloses a wafer polishing system which at least comprises a polishing table with a polishing pad, a polishing head used for driving a wafer to move relative to the polishing table, and a polishing liquid arm used for conveying polishing liquid to the polishing table, an atomizing spray head is arranged in the space where the polishing table is located, and the atomizing spray head sprays liquid to the area where the polishing pad is located. To form a wetted region on the polishing pad. Atomization wetting of the polishing pad is achieved through the atomization nozzle, the spraying coverage range of the atomization nozzle is large, meanwhile, water consumption is small, and the atomization function can be achieved with the minimum cost; the atomization is realized on the premise of not adding a new water source and a new control structure, and the influence on the work of the wafer polishing system is avoided; and the atomizing nozzle can be flexibly switched between a working state and a closed state, can also be disassembled and assembled at any time, can be flexibly applied to different polishing processes, and is high in use flexibility.

The invention discloses a multi-angle micro-nano bubble cleaning system for wafers, which belongs to the technical field of micro-nano bubble cleaning and comprises an ozone generator, a heating tank, a micro-nano bubble generator, a cleaning tank, a filter and an electric control cabinet. The ozone generator and the heating tank are respectively connected with an inlet of the micro-nano bubble generator, an outlet of the micro-nano bubble generator is connected with an inlet of the cleaning tank, and an outlet of the cleaning tank is connected with the filter; the electric control cabinet is electrically connected with the heating tank, the ozone generator and the micro-nano bubble generator; the cleaning pool comprises a cleaning station and a plurality of cleaning nozzles, and the cleaning nozzles can be driven to swing through a reciprocating motor; the invention further discloses a corresponding cleaning method. The cleaning efficiency and the removal rate of stains on the surface of the wafer can be improved, uneven cleaning is avoided, and pollution to the environment is reduced.

The invention provides toughened anti-cracking and anti-corrosion solid waste concrete and a preparation method thereof. Mixing the cement, the fly ash, the slag and the natural aggregate; sequentially adding water, a weakly alkaline regulator and an additive solution containing a polycarboxylic acid water reducer to obtain concrete slurry; and curing to obtain the product. According to the invention, fly ash, slag solid waste and natural aggregate are used as aggregate, a water reducer is added to reduce the water consumption of concrete and improve the fluidity of concrete, and specially-made weakly-alkaline conditioning agent particles are introduced, so that the self-water-absorption-water-release behavior and bridging effect of the particles are utilized to improve the concrete fluidity. The early-stage and later-stage continuous hydration ability of a rubber material in the concrete is enhanced, the self-shrinkage and drying shrinkage resisting effects are achieved, the compactness and corrosion resistance of the concrete are improved, and then the anti-cracking ability of the all-solid waste concrete is improved. The surface of an obtained test piece is free of cracks, the 28d compressive strength reaches 46.6 MPa, the 28d breaking strength reaches 8.5 MPa, the self-shrinkage rate is 0.035%, and the drying shrinkage rate is 0.01%.

The invention provides a method for preparing anti-retrogradation low-viscosity starch by extruding and activating citric acid, which comprises the following steps: fully mixing citric acid and starch which are weighed in proportion in a mixer, then activating the citric acid by using an extrusion technology and promoting the citric acid to be combined with starch molecules for extrusion, and then drying the extrudate in an infrared drying oven to obtain the anti-retrogradation low-viscosity starch. And drying and grinding to obtain the anti-retrogradation low-viscosity starch. The method provided by the invention effectively delays the retrogradation of starch, reduces the viscosity of starch after gelatinization, and solves the industrial problems of harsh reaction conditions and low reaction efficiency of citric acid modified starch, and the preparation process does not generate wastewater and is simple to operate.