303results about How to "Less impurities" patented technology

The invention discloses nanoscale high-entropy A2B2O7 type oxide ceramic powder and a preparation method of a nano ceramic block of the nanoscale high-entropy A2B2O7 type oxide ceramic powder, and the preparation method comprises the following steps: S1, uniformly dispersing a rare earth element source and a transition metal source in deionized water, stirring at room temperature, and then adding a polymerizing agent and an inducer to obtain a mixed solution; s2, continuously stirring at room temperature to form a transparent clear solution; s3, heating the transparent clarified solution until milk white gel is gradually formed; and S4, drying the milk white gel into dry gel. According to the nanoscale high-entropy A2B2O7 type oxide ceramic powder and the preparation method of the nano ceramic block of the nanoscale high-entropy A2B2O7 type oxide ceramic powder, discharge plasma sintering is combined with a two-step preparation process, the efficiency is high, sintering is compact, the grain size of a ceramic block material can be controlled, and the nano ceramic block can be used for preparing the nano-scale high-entropy A2B2O7 type oxide ceramic powder. And the synthesized oxide has the characteristics of fine powder particle size, uniform distribution, few impurities and the like, and the method is low in synthesis temperature and relatively low in cost.

The utility model discloses a device for removing impurities in trichlorosilane, relates to the technical field of polycrystalline silicon production, and mainly aims to improve the removal efficiency of the impurities in the trichlorosilane on the basis of not increasing the cost. According to the main technical scheme, the device for removing the impurities in the trichlorosilane is characterized in that an inlet of a first mixer is connected to one end of a first feeding pipe and a second feeding pipe, a plurality of baffle plates are arranged in a reaction tank in a staggered mode and used for forming a baffle channel in the reaction tank, and one end of the baffle channel is connected to an outlet of the first mixer; the other end of the baffling channel, the filter and an inlet of the separating tower are sequentially connected, the inlet of the separating tower is further connected to a siloxane conveying pipe, a tower kettle of the separating tower is connected to the other end of the first feeding pipe and used for guiding siloxane to the first mixer, and a top collecting pipe of the separating tower is connected to the rectifying unit; wherein the second feeding pipe is used for guiding a trichlorosilane and dichlorosilane mixture containing impurities to the first mixer.

The invention discloses a modification method for obtaining melt separation titanium slag based on a hydrogen-based shaft furnace reduction-melt separation process, and belongs to the technical field of titanium-containing melt separation slag modified.The method specifically comprises the steps that S1, high-titanium vanadium-titanium pellets are prepared; s2, high-titanium type vanadium-titanium metallized pellets are prepared, and reduction is conducted through a hydrogen-based shaft furnace; s3, the high-titanium type vanadium-titanium metallized pellets are subjected to melt separation, and titanium-containing melt separation slag is obtained; s4, the titanium-containing molten slag is subjected to modification treatment of silicon extraction and magnesium reduction, and anosovite phase precipitates are obtained; the method provided by the invention lays a foundation for pure steel production; impurities in the smelting process are few, and products are pure; a hydrogen reduction gas product (water) is easy to separate and treat, so that clean production can be realized; iron is extracted and other valuable components are enriched at the same time; when the vanadium titano-magnetite is subjected to hydrogen reduction, TiO2 cannot be reduced, and separation of iron and titanium components in the subsequent process is facilitated.

The latex waste liquid recovery device comprises a recovery tank and a demulsification stirring structure, the top of the recovery tank is provided with a liquid inlet box, the bottom of the recovery tank is provided with a blow-off pipe, the side wall of the recovery tank is provided with a demulsification liquid adding port, the inner side wall of the recovery tank is provided with a filtering recovery tank, the filtering recovery tank is of an annular structure, and the demulsification stirring structure is arranged in the filtering recovery tank. A water passing hole is formed in the bottom of the filtering and recycling tank, a filtering net is arranged in the recycling tank and is of a conical structure, the bottom of the filtering net is arranged at the top of the filtering and recycling tank, and the demulsification stirring structure is arranged in the recycling tank. The utility model relates to the technical field of latex production, and particularly provides a latex waste liquid recovery device which can fully and efficiently mix waste liquid with a demulsifier and can clean the inner wall of a tank body.

The invention discloses a method for efficiently leaching waste aluminum electrolyte and recovering fluorine, lithium, aluminum and sodium, belongs to the field of solid waste resource recovery, and solves the following problems of low aluminum and lithium leaching rate in an alkaline process and HF pollution in an acid process. The method comprises the following steps: crushing, grinding and screening waste aluminum electrolyte blocks to obtain waste aluminum electrolyte powder A; uniformly mixing the waste aluminum electrolyte powder A with a calcium-containing reaction auxiliary material to obtain a material B; adding the material B into an alkali solution, and carrying out a leaching reaction; separating the materials to obtain filter residues and filtrate; carrying out acid pickling purification and impurity removal on filter residues, and filtering; extracting the filtrate to obtain a loaded organic phase and raffinate; carrying out reverse extraction on the loaded organic phase; adding reaction auxiliary materials into the raffinate, uniformly stirring, reacting, standing, filtering and separating; continuously supplementing reaction auxiliary materials into the filtrate, uniformly stirring, standing, filtering and separating. According to the method, multiple components in the waste aluminum electrolyte can be efficiently recycled, and the comprehensive utilization rate is high.

The invention relates to the field of agricultural machinery, and discloses a rice threshing device with a drying function, comprising: a crushing assembly used for preliminarily separating harvested rice so as to provide convenience for subsequent threshing operation; the extrusion assembly can automatically turn over rice to be threshed, and the double-face threshing function is achieved; the crushing assembly is used for crushing rice, the drying assembly is used for removing waste and dust generated in the threshing process and drying the threshed rice through a heating function, and the driving assembly is used for driving the crushing assembly and the telescopic assembly to synchronously operate to ensure that the threshing process is efficiently carried out; and the screening assembly is used for screening the threshed rice and waste materials generated in the threshing process, and further separation of the materials is achieved. Preliminary crushing is firstly carried out through the crushing assembly, the extrusion assembly achieves double-face extrusion through hydraulic control, it is ensured that grains fully fall off, the telescopic assembly can accurately adjust the threshing strength according to the variety and maturity of different rice, and the threshing efficiency is improved to the maximum extent.

The invention discloses a method for preparing plant-derived cholesterol through chemical catalysis, which is characterized in that plant-derived BA is used as a raw material, chemical catalytic reduction is carried out through an intermediate compound 3, compared with an enzyme method, a large number of proper enzymes do not need to be screened, the cost is low, the stability is good, in addition, the influence of reaction sites on the Grignard addition yield is avoided through hydroxyl protection, and the yield of the plant-derived cholesterol is improved. Finished product isomer impurities can be reduced, the product yield is improved, and purification treatment is facilitated. The whole preparation route does not need an expensive catalyst, the reaction condition is mild, the specificity is high, the high-purity cholesterol can be obtained only through simple aftertreatment in each step, the method is suitable for industrial production, and the quality can meet the standards of medical injection and pharmaceutic adjuvants.

The invention discloses a nanofiber membrane material for a solid polymer electrolyte as well as a preparation method and application of the nanofiber membrane material. The nanofiber membrane material is prepared from the following raw materials: an electrostatic spinning fiber membrane and a polymer matrix, the polymer matrix comprises a polymeric monomer, a lithium salt and an initiator; the polymeric monomers comprise polyethylene glycol diacrylate and trifluoroethyl methacrylate. The room-temperature ionic conductivity, the electrochemical window and the high-temperature mechanical property of the nanofiber membrane material disclosed by the invention are all at relatively high levels in the field of solid polymer electrolyte, and the nanofiber membrane material is easy to prepare and assemble into a battery.

The invention relates to preparation of sodium bicarbonate co-production ammonium sulfate, in particular to a method and a system for preparing sodium bicarbonate co-production ammonium sulfate from low-temperature mirabilite, and aims to overcome the defects that high-purity ammonium sulfate cannot be obtained or the technical route of twice freezing-high-temperature ammonia distillation is high in energy consumption and large in industrialization difficulty in the prior art. The method for preparing sodium bicarbonate and co-producing ammonium sulfate from mirabilite at low temperature comprises the steps of preparing sodium bicarbonate, preparing ammonium sodium solid salt, acidifying and crystallizing the ammonium sodium solid salt, cooling and crystallizing, and preparing ammonium sulfate, and the sodium sulfate and the ammonium sodium solid salt are removed to obtain a high-purity sodium bicarbonate product and an ammonium sulfate product. In the system for preparing sodium bicarbonate and co-producing ammonium sulfate from mirabilite at low temperature, a plurality of evaporation devices and recycling pipelines among the evaporation devices are reasonably arranged, so that full utilization and recovery of products in each step are realized.

The invention discloses an extraction method of silymarin. The extraction method of the silymarin comprises the steps of polar solvent treatment, acid solution treatment, alkaline solution treatment and purification. The polar solvent is selected from one or more of chloroform and dichloromethane, and the alkaline solution comprises one or more of sodium hydroxide and potassium hydroxide. The extraction method of the silymarin provided by the invention has the effects of reducing the extraction difficulty and cost of the silymarin.

The invention discloses a double-filtration separation device and an engine oil filter comprising the same, and the double-filtration separation device comprises a separation ring, a filter element and a filter element, the separation cavity is coaxially formed in the separation ring in an annular form; the magnetic block and the granular activated carbon are positioned in the separation chamber; the inlet hole and the outlet hole are formed in the separation ring and are both communicated with the separation cavity; the filter screen is fixedly arranged at the outlet hole and is used for holding granular active carbon; wherein low-temperature engine oil containing impurities enters the separation cavity through the inlet hole and is discharged from the outlet hole after being subjected to double adsorption of the magnetic block and the granular activated carbon, and the discharged engine oil flows back through the bypass valve. The cover pole is fixedly arranged at the top of the shell; and the sealing ring is fixedly arranged on the cover pole. Engine oil directly impacts on the inner rings of the magnetic blocks and rotationally flows in the inner rings of the magnetic blocks, so that metal particles in the engine oil move towards the magnetic blocks, and the metal particles are magnetically adsorbed by the magnetic blocks more quickly in cooperation with magnetic adsorption of the magnetic blocks.

The invention provides a preparation method for efficiently synthesizing hectorite, aiming at the defects that the existing hectorite synthesis technology is high in cost, complex in condition, time-consuming, energy-consuming and the like, process improvement is carried out, and the method comprises the following core steps: adding a magnesium carbonate and magnesium oxide mixed magnesium source, a specific silicon source and a single lithium source into deionized water at room temperature, and carrying out high-speed shearing to obtain uniform slurry; then adjusting the pH value by adopting sulfuric acid, hydrochloric acid, sodium carbonate or introducing a plurality of regulators such as carbon dioxide, and shearing; and performing high-temperature crystallization in a closed container, and sequentially performing filter pressing, washing, drying, grinding and sieving to obtain a finished product. According to the preparation method for efficiently synthesizing hectorite provided by the invention, various cheap raw materials are selected to replace high-purity chemicals, multi-link optimization is realized, the cost is reduced, the efficiency is increased, time is shortened, energy is saved, and the product is excellent in quality, high in purity, few in impurities, excellent in microstructure, dispersed, transparent, high in rheological property and huge in application potential in the fields of cosmetics, well drilling, coatings and the like; the method has breakthrough significance and wide prospects in industrial production and product application.

The utility model relates to a wagon balance with a cleaning device, which comprises a weighing platform and two guide slopes, the weighing platform is connected with supporting blocks, the two supporting blocks are connected with connecting plates in a sliding manner, the length direction of the connecting plates is consistent with the width direction of the weighing platform, the connecting plates are connected with bristle pieces, and the bristle pieces are connected with the cleaning device. The bristle part is used for cleaning impurities on the top of the weighing platform, the supporting block is connected with a moving assembly, the moving assembly is used for driving the connecting plate to be slidably connected to the supporting block in the length direction of the weighing platform, the moving assembly is connected with a rotating part, and the rotating part is used for driving the connecting plate to rotate and driving the connecting plate to be away from the weighing platform. The moving assembly drives the connecting plate to be slidably connected to the supporting block in the length direction of the weighing platform, and the connecting plate drives the bristle piece to move in the length direction of the weighing platform, so that the bristle piece cleans the top of the weighing platform, impurities on the top of the weighing platform are reduced, and the weighing precision is improved.

The invention relates to the technical field of trehalose preparation, in particular to high-purity trehalose and a crystallization method and application thereof. The crystallization method comprises the following steps: (1) heating a trehalose solution to 60-65 DEG C, and adding a seed crystal to obtain a seed crystal sugar solution; (2) cooling the seed crystal sugar solution to 25-30 DEG C to obtain a trehalose crystal; (3) heating the trehalose crystals to 60-65 DEG C, and keeping the temperature for 10-20 minutes to obtain a trehalose mixture; and (4) repeating the steps (2)-(3) for 0-2 times, cooling the trehalose mixture to 25-30 DEG C, keeping for 9-10 hours, centrifuging, drying and screening to obtain the high-purity trehalose. The high-purity trehalose prepared by the method disclosed by the invention is high in purity, few in impurities, uniform in trehalose crystal particle, stable in quality and high in recovery rate, and can be widely applied to the fields of food, medicine, daily chemical industry and the like.

The utility model discloses a liquid medicine coating device for biological medicine fertilizer production, which comprises a cylinder body and a cover plate, the cover plate is arranged at the top of the cylinder body, the cylinder body is provided with a roller path, a spraying system and a hot air system, the cover plate is provided with a fixed support, the roller path is arranged on the fixed support, the fixed support is movably connected with the cylinder body, and a feeding port is arranged at the top of the cover plate. The feeding port is connected with the roller path, a material collecting port is formed in the bottom of the cylinder body, and the feeding port is connected with the roller path. The device can be conveniently disassembled and cleaned, residues in the roller path are avoided, impurities in biological medicine fertilizer are reduced, and the quality of the biological medicine fertilizer is improved.

The invention relates to the technical field of cooling devices, and discloses a cooling device for iron casting production, which comprises a base, the top of the base is fixedly connected with a support frame, the inner wall of the support frame is provided with a fan assembly, the rear part of the base is fixedly communicated with a water inlet pipe, and the front part of the base is fixedly communicated with a water outlet pipe. After air cooling, the lifting frame is driven by the air cylinder to move so that an iron casting can be subjected to water cooling, manual contact is avoided, the service life of the equipment is prolonged, meanwhile, the cooling speed of the iron casting is further increased, the quality of produced cast iron is better, and before water cooling, the cooling efficiency is improved. The lifting frame moves to drive the pressing plate to move to clamp the iron casting, the position of the iron casting in water flow is prevented from being changed, cooling of the iron casting is more stable, the overall working efficiency of equipment is improved, and the overall quality of products is further improved.

The invention discloses a preparation method of oxilafluorine, which comprises the following step: carrying out alkylation, deprotection, hydroxyethylation and salt forming reaction on a compound (II) to prepare the oxilafluorine as shown in a formula (I). The method has the advantages of low raw material cost, simple process operation, environmental friendliness, high reaction yield, high product purity and wide industrial prospect.

The invention belongs to the technical field of bacteriostatic nano materials, and particularly provides broad-spectrum bacteriostatic carbon quantum dots as well as a preparation method and application thereof, the broad-spectrum bacteriostatic carbon quantum dots are obtained by performing hydrothermal reaction on common turnip powder or common turnip residues in a water environment; the temperature of the hydrothermal reaction is 120-200 DEG C, and the time is 6-8 hours. The common turnip residues are subjected to polysaccharide extraction. The broad-spectrum antibacterial carbon quantum dots have a good inhibition effect on bacteria and fungi, the whole preparation process is simple and environment-friendly, and the common turnip residue carbon quantum dots have a relatively strong inhibition capability on penicillium expansum.

The invention belongs to the field of organic synthesis, and relates to a synthesis method of N-(2-cyanoethyl)-caprolactam. According to the method, a double-base co-catalysis system is adopted, and epsilon-caprolactam and acrylonitrile are subjected to an addition coupling reaction to synthesize N-(2-cyanoethyl)-caprolactam. The method has the characteristics of easily available raw materials, high catalyst activity, simple operation, mild reaction conditions, high chemical selectivity and the like. The N-(2-cyanoethyl)-caprolactam prepared by the invention can be used for preparing organic strong base 1, 8-diazabicyclo [5, 4, 0] undecene (DBU) with important application value through hydrogenation and dehydration condensation.

The invention discloses a continuous preparation method of lauroyl chloride, which comprises the following steps: heating and melting lauric acid to obtain lauric acid melt; the method comprises the following steps: preparing an overflow diode reactor, continuously introducing phosgene and lauric acid melt into a first tubular reactor, reacting at 50-100 DEG C to obtain a photochemical reaction solution, continuously overflowing the photochemical reaction solution into a second tubular reactor, continuously reacting the unfinished reaction solution, and driving light by nitrogen to obtain lauroyl chloride. The continuous preparation method disclosed by the invention has the advantages of simple process, low online liquid carrying amount, convenience in operation, low cost and the like, and the obtained product is low in chromaticity, high in purity, few in impurities, suitable for industrial production and wide in application prospect.

The invention discloses a method for preparing battery-grade iron phosphate by using titanium dioxide by-product ferrous chloride, and relates to the technical field of production of lithium iron phosphate precursors. Comprising the following steps: preparing a ferrous chloride crude product into a solution, adjusting the pH value of the solution, adopting an operation sequence of oxidizing ferrous ions while synthesizing the ferric phosphate during synthesis of the ferric phosphate, so that the conversion rate of the ferrous ions is high, the growth process of the ferric phosphate crystal is convenient to control, and then adjusting the pH value and the temperature again in the aging stage of the ferric phosphate crystal to obtain the ferric phosphate crystal. The influence of impurities in the iron phosphate is further reduced, so that the iron phosphate crude product is gradually converted into qualified iron phosphate. According to the method, in the process of preparing the battery-grade iron phosphate from the titanium dioxide by-product ferrous chloride, the influence of impurities in the by-product on synthesis and preparation can be reduced by adjusting the pH value of the corresponding solution for multiple times and optimizing the adding sequence of the reagents, so that the finished iron phosphate contains few impurities and is high in purity, the utilization rate of the titanium dioxide by-product ferrous chloride is increased, and the method is suitable for industrial production. The cost is saved.

The invention discloses separation equipment for recycling lithium battery positive and negative electrode disassembly waste, and relates to the technical field of waste sorting, the separation equipment comprises a feeding cylinder and a discharging cylinder, the discharging cylinder is provided with two cavities, a connecting ring is connected between the feeding cylinder and the discharging cylinder, the middle of the interior of the connecting ring is fixedly connected with a conical filtering disc and a plane filtering disc, and the conical filtering disc and the plane filtering disc are fixedly connected with the discharging cylinder. The conical filtering disc is located above the plane filtering disc, the plane filtering disc is located above one cavity of the discharging barrel, the feeding barrel and the discharging barrel are in bolted connection through at least two connecting threaded frames and nuts, and the connecting ring is fixedly connected with at least two vibrators. Through the separation pipeline and the suction device, the negative electrode materials on the conical filtering disc and the plane filtering disc can be effectively adsorbed, the negative electrode materials are prevented from being sieved and falling off along with the positive electrode materials, the separation precision of the positive electrode materials and the negative electrode materials is remarkably improved, and impurities in a mixture are reduced.

The utility model relates to the field of beating machines, in particular to a papermaking beating machine. According to the technical scheme, the device is characterized by comprising a pulp chest, a pulping assembly and an adsorption assembly, the pulping assembly is installed in the pulp chest and used for smashing paper shells in the pulp chest, and the adsorption assembly is also installed in the pulp chest, adjacent to the pulping assembly and used for adsorbing metal impurities in paper pulp, so that the metal impurities are separated from the paper pulp, the impurities in the paper pulp are reduced, and the production efficiency is improved. And the paper pulp quality is effectively improved.

The invention belongs to the technical field of biology, and particularly relates to a small molecule peptide composition and method for regulating natural calculus bovis production. The small molecule peptide aiming at a key target spot is designed by deeply researching secretion and metabolism of ox bile. The action mechanism covers biliary secretion stimulation, component optimization, bezoar key enzyme activity promotion and immune response regulation. A chemical synthesis or biotechnology means is adopted for preparation, and the dosage is determined according to cattle conditions during application. The safety is strictly evaluated, the yield of the natural calculus bovis can be obviously improved by 65%, the quality is also greatly improved, the effective components are increased, the impurities are reduced, the drug effect is enhanced, a new efficient and safe way is opened up for the production of the natural calculus bovis, and the method has a wide application prospect.

The invention discloses a method for producing sintered brown aluminum oxide, which comprises the following steps of: crushing bauxite raw ore into particles, mixing the particles with sodium carboxymethyl cellulose and boric acid which are used as binding agents, aluminum oxide and water, grinding into fine particles, treating materials, namely cleaning soil adhered in the transportation process of bauxite, crushing and grinding for later use, crushing and grinding a carbon material for later use, and drying to obtain the sintered brown aluminum oxide. And removing rust outside the scrap iron, crushing and grinding for later use. The sintered brown aluminum oxide is produced by taking high-alumina bauxite raw ore which is loose in structure and cannot be directly sintered and industrial aluminum oxide or calcined aluminum oxide powder as raw materials.

The invention discloses a salt lake brine impurity removal device and method, and relates to the technical field of inorganic salt chemical engineering, the salt lake brine impurity removal device comprises a tank body, a sealing cover is detachably connected to the top end of the tank body, a pressure applying assembly is installed on the sealing cover, a first filter membrane is installed in the middle of the tank body, the movable end of the pressure applying assembly faces the first filter membrane, and a motor is installed on the tank body below the first filter membrane; a first electric push rod is installed at the output end of the motor, the output end of the first electric push rod faces the pressure applying assembly, a plurality of sets of scraping plates are detachably installed at the output end of the first electric push rod through an installation assembly, when the scraping plates are located at the lowest positions, the scraping plates are in sliding connection with the first filter membrane, and fine filter assemblies are installed on the scraping plates. Residual substances in the solution can be further removed through secondary filtering treatment, and the purity of the final solution is improved, so that the energy consumption and the chemical use amount in subsequent treatment steps are reduced, and the overall treatment cost is reduced.

The invention belongs to the technical field of plant active ingredient extraction, and relates to a segmented enzymolysis-cascade membrane separation extraction method of cyclocarya paliurus combined-state selenium polysaccharide and the combined-state selenium polysaccharide prepared by the method. The method comprises the following steps: firstly, constructing a first extraction system for a cyclocarya paliurus leaf raw material, carrying out first-stage enzymolysis, inactivation and solid-liquid separation, separating a first liquid phase through a nanofiltration membrane to form a low-molecular selenium-containing component flow, and excluding the low-molecular selenium-containing component flow in a subsequent alcohol precipitation and recovery step; and constructing a second extraction system from the first solid phase, carrying out second-stage enzymolysis, inactivation and solid-liquid separation, sequentially carrying out microfiltration, first ultrafiltration, second ultrafiltration and nanofiltration washing on the second liquid phase, and carrying out ethanol precipitation to obtain the combined-state selenium polysaccharide. The proportion of target molecular weight interval components in the obtained product is increased, the mass fraction of polysaccharide is increased, and the proportion of inorganic selenium, the mass fraction of protein and the ash content are reduced.

The utility model discloses a motor end cover structure, which relates to the technical field of motor end covers and comprises a motor end cover main body, a plurality of fixing plates distributed in an annular array are mounted at the rear part of the outer surface of the motor end cover main body, and mounting holes are formed in the plurality of fixing plates. The upper portion and the lower portion of the front inner wall of the motor end cover body are each provided with a plurality of heat dissipation holes, the heat dissipation holes extend to the front side of the motor end cover body, the upper portion and the lower portion of the front end of the motor end cover body are each provided with a screen, and the left portion and the right portion of the front end of the motor end cover body are jointly provided with a U-shaped frame. And a connecting shaft is movably arranged in the U-shaped frame in a sleeving manner. According to the utility model, the baffle plate, the brush and the connecting shaft cooperate with each other to block the front of the screen, so that dust, metal chips or other impurities are prevented from passing through the heat dissipation holes to pollute the interior of the motor, and the performance and normal use of the motor are ensured.

The invention relates to the technical field of halogen preparation, in particular to a system for preparing halogen in brine through a flue gas method, which comprises a boiler, a flue gas purification unit, a brine purification unit, a bromine extraction unit, a nitrate preparation system, a high-nitrate liquid storage device, a chlorine storage device and a caustic soda storage device, and the output end of the boiler is connected with the input end of the purification unit; the output end of the flue gas purification unit is connected with the input end of the bromine extraction unit and the input end of the brine purification unit; the output end of the brine purification unit is connected with the nitrate preparation system, the high-nitrate liquid storage device, the chlorine storage device and the caustic soda storage device; the caustic soda storage device is connected to the purified brine; the chlorine storage device is connected to the bromine extraction unit; according to the invention, multiple halogens are prepared on the whole, and partial circulating units are formed among a part of systems, so that waste materials after production can be extracted and utilized again, the utilization rate of resources is improved, and the utilization rate of flue gas can be improved.

The invention discloses a method for breeding, separating and purifying nosema bombycis, which comprises the following steps: infecting 2-year-old silkworms for 6-12 hours by using nosema bombycis with the concentration of 1.0 * 10 < 5 > spores / mL to 5.0 * 10 < 5 > spores / mL, feeding the silkworms with clean mulberry leaves until the silkworms fall asleep at 4 years old, and gradually causing pebrine death when the silkworms grow at 5 years old; the method comprises the following steps: grinding dead silkworms to prepare grinding liquid, filtering the grinding liquid, and separating out filtrate enriched with nosema bombycis; centrifuging the filtrate to obtain a precipitate which comprises grey silkworm body tissues on the upper layer and white nosema bombycis on the lower layer, shaking the centrifuge tube by using a shaking table to release the grey silkworm body tissues to supernate, pouring out the supernate, and retaining the white nosema bombycis at the bottom of the centrifuge tube. According to the method, the nosema bombycis is bred, separated and purified according to the growth rules and characteristics of the bombyx mori and the nosema bombycis, a high-quality sample can be efficiently obtained, and the nosema bombycis is high in content and few in impurity.