249results about How to "Increase unit output" patented technology

The invention provides an acidic soil conditioner, and a preparation method and application thereof. The acidic soil conditioner comprises the following components in part by weight: 4 to 8 parts of composite bacterial agent, 80 to 90 parts of acid adjusting factor, 3 to 7 parts of chelate and 2 to 6 parts of organic matter. The acidic soil conditioner adjusts the pH value of soil, promotes formation of soil aggregate structures, improves the physical property of the soil, creates a good ecological environment for the growth of plants, increases organic matters, calcium, magnesium and silicon and the activities thereof, promotes healthy growth of crops, enhances stress resistance and prevents diseases and pests. By adoption of the composite bacterial agent, the constitution of a microflora of the soil can be improved, the microbial activity of the rhizosphere of the crops is enhanced, mineralization of organic pollutants is accelerated, growth of the plants is promoted, and absorption of degradation products and bioremediation of the polluted soil are accelerated. The acidic soil conditioner has no toxicity, residues and pollution, accords with the development tendency of organic pollution-free agriculture and has great popularization and application values.

The invention discloses a vertical mill operation regulation and control system based on data mining and a method thereof. The method is characterized by using an integration characteristic screening method to carry out mining analysis on work condition data and acquiring a vertical mill health state assessment index; carrying out cluster mining analysis on a work condition state, acquiring a characteristic of each condition cluster, and acquiring each state distribution condition in historical work conditions; defining operation state types in the historical work conditions and acquiring a stable mode condition database; using an ARIMA algorithm to carry out training model on a determined characteristic value in a vertical mill health state characteristic acquisition module and predict a parameter change trend, and using a predicted value to assist state identification; combining the predicted value given by an ARIMA model, determining a vertical mill operation state; when the state is determined to be abnormal, reading a work condition record in the stable work condition mode database, acquiring a recommended regulation and control target value and regulating and controlling a controllable parameter at the moment. In the invention, vertical-mill qualitative and quantitative regulation and control suggestions can be accurately provided and a mill machine can work stably for a long time.

The invention belongs to the technical field of preparation and application of nano composite material, and in particular relates to a method for preparing a magnetic nano metallic iron particle / carbon nano tube functional composite material. The invention discloses a method for filling a carbon nano tube with magnetic nano metallic iron particles. The method comprises the following steps: carrying out refluxing treatment on the carbon nano tube in concentrated nitric acid, introducing functional groups such as carbonyl, hydroxyl, carboxyl and the like on the surface of the carbon nano tube, carrying out ultrasonic dispersion and electromagnetic mixing on the treated carbon nano tube in aqueous solution of bivalent ferric salt, filling the bivalent ferric salt in the carbon nano tube through capillary action, thermally treating the carbon nano tube at inert atmosphere, decomposing the bivalent ferric salt filled inside the carbon nano tube into ferric oxide, and reducing the ferric oxide into the magnetic nano metallic iron particles by hydrogen to obtain the composite material for filling the magnetic nano metallic iron particles into the carbon nano tube, wherein the magnetic nano metallic iron particles can be filled in the carbon nano tubes the calibers of which are 10 to 100 nanometers and which have different structures, and the carbon nano tubes with different calibers as templates can accurately control the size of the magnetic nano metallic iron particles. The method has the advantages of simple process and good controllability, can make the magnetic nano metallic iron particles evenly filled in the carbon nano tube with high filling rate, and is convenient for industrialized production; and the prepared nano magnetic composite material has good application prospect in the fields of high-density magnetic recording materials, wave-absorbing materials, electromagnetic shielding materials, nuclear magnetic resonance imaging materials.

The invention discloses a shrimp, crab and mandarin fish polyculture method, which includes pond construction, clearing and disinfection and shrimp seed stocking; pond construction means that an old pond is altered or a new pond is dug, so that the culture pond can come up to various indexes of standardized fish pond construction; clearing and disinfection mean that after old pond silt clearing, pond embankment leakage prevention and reinforcement, new / old fish pond escape-proof facility arrangement, pond insolation and other works, the whole pond is thoroughly disinfected; the quantity of stocked shrimp seeds is 10 kilograms of freshwater shrimps per mu, and the specification is 1000 to 1400 post-winter shrimp seeds per kilogram; the quantity of stocked silver carp seeds and bighead carp seeds is 30 to 50 per mu; the area of planted waterweeds is about 50 percent of the area of the pond; the quantity of migrated snails is 230 to 260 kilograms per mu; preferably, the quantity of stocked juvenile river crabs is 500 to 800 per mu; preferably, the quantity of stocked loaches is 350 to 450 per mu; and preferably, the quantity of stocked yellow catfishes is 250 to 350 per mu. The method covers the shrimp, crab and mandarin fish polyculture technique and the high-efficiency polyculture technique for a variety of fishes, and forms a unique feasible technical operation route, the polyculture mode is novel, the economic benefit is high, and the ecological environment is good.

The embodiment of the invention discloses a production technology of a super simulation silk kam ammonia air-coated wire. The production technology comprises the following steps: a) melt spinning; b) laterally blowing cooling; c) oiling and bundling; d) winding, namely finishing the production processes of chinlon drafting, chinlon false twisting and elasticizing, spandex drafting, spandex wire air-coating, winding and molding one time on an 'elasticizing and blanking all-in-one machine' by improving a blank wire processing technology, and critical components such as a network nozzle and the like, concretely including the steps e) to g), e), heating a guide wire; f) cooling and false twisting; and g) drafting and networking. The production technology is formed by spinning and blanking in a two-stage manner by adopting an improved section shape of a spinneret orifice, the blanking all-in-one machine, and improvement of technological parameters in the steps; bad phenomena that a POY (polyester pre-oriented yarn) easily generates uneven fibre number, low breaking strength and the like in the spinning process are solved; and meanwhile, the problems of broken filaments, broken ends and the like easily generated in false twist deformation of elasticizing and blanking are also solved.

The invention discloses an emergency control method with failure of an anemorumbometer of a wind generating set. The emergency control method comprises the following steps of: (1), taking all units in a wind field as a centre, and forming a small network through an SCADA (Supervisory Control and Data Acquisition) system of the wind field and three units closest to the position of the SCADA system; (2), when the units are operated normally, feeding collected wind speed and wind direction signals back to a central controller through the SCADA system, and displaying various real-time information in real time; (3), when the anemorumbometer of the units is failed, reporting to the central controller at first, carrying out heterochromous display at an obvious position by the central controller, and giving an alarm to monitoring personnel; and (4), meanwhile, starting emergency control programs at corresponding functional positions in a fan control program, applying for reading wind speed / direction information from the SCADA system by a fan controller, if application is not successful, stopping; if the application is passed, sending instructions to the units according to data read in the SCADA system, and maintaining operation of the units till maintainers maintain a fan to exclude faults.

A coilia ectenes step type breeding method comprises the nine steps of reserved parent pool simulated ecological cultivation, parent pool intensive culture, parent selection for induced spawning, parent induced spawning, natural insemination, germ cell collection, germ cell incubation, indoor intensive fry rearing in a cement pool and large-scale fry culture in an outdoor pool. The method is characterized in that filial-generation coilia ectenes adult fishes which are more than 2 years old and cultured by manpower are used as reserved parents for artificial propagation, and a natural ecology cultivation mode is simulated; the selected parents are transported and placed in an induced spawning pool, after parent induced spawning is conducted, the germ cells are collected, counted and transferred to an incubation pool, after the germ cells are collected, the germ cells are placed in the incubation pool with water, fries open the mouths 5-6 days after membrane rupture is conducted, yolks and freshwater rotifers which are filtered through a 80-mesh silk net are fed to the fries, after the fries are cultivated for 15 days, the fries are divided to different pools, and when the fries are as long as 20-30 mm, the fries are placed to outdoor pools to be cultivated.

The invention discloses a high-yield planting method for preventing and treating corn stem rot in semi-arid regions, belonging to the technical field of agricultural planting and culturing. The high-yield planting method comprises the following steps: land selection and preparation, seed selection, seed treatment, ridging, base fertilizer application, seeding, drop irrigation, water feeding, weeding, membrane lamination, top application, field management, corn stem rot prevention, harvesting and the like. According to the high-yield planting method, the problem that the seeding emergence rate of corns in the second year is influenced by the total straw application of straws is solved; by processing corn seeds, the emergence rate can be improved by more than or equal to 5%, and the straw turnover in the second year is not influenced; the preventing and treating effect of the corn stem rot reaches more than or equal to 70%; water is saved by more than or equal to 40%, and the corn yield is increased to be 800-1000 kilograms per hectare; adverse factors caused by the ecological environment to the agricultural production are overcome, the traditional agricultural production mode is changed, the unit yield is increased, the yield and the efficiency are increased, and the effects of reducing wind erosion of soil, protecting the environment and improving the drought resisting capacity and the production stability of crops are achieved.

The invention relates to a water turbine used for operations such as hydroelectric power generation, water pumping and the like by using nature water flow and low water head. The water turbine is characterized in that a water wheel is composed of a floating barrel and blades provided with independent seal cavities, the water wheel rotates by absorbing water energy so as to provide power for the water turbine and generally provide buoyant force support for the water turbine simultaneously; and the water turbine is divided into a built-in type water turbine and an external type water turbine and the main difference between the two types of water turbine is that a generator, a gear case and the like are placed inside or outside the floating barrel. The water turbine provided by the invention has the advantages of low manufacturing cost and operating cost and high energy conversion rate, and is applicable to multiple occasions.

The invention relates to the field of microorganisms and discloses a method for high-density fermentation of pichia pastoris of insulin precurosor protein. The method comprises the steps of expanding culture of strain, fermentation culture and thallus collection. Fermentation culture is divided into a batch growth phase, a glycerinum replenishment phase and a methyl alcohol induction phase. By controlling parameters including age, replenishing rate and pH value of strain during fermentation, the concentration of glycosylation 2 can be effectively reduced by 60+ / -8%, and the unit yield of insulin precurosor protein can be increased by 25% or above. Furthermore, the method has the advantages of being simple, easy to operate, low in cost and the like.

The invention relates to a PVC (Polyvinyl Chloride) tube, in particular to a manufacturing method of a cold bending electrical protective casing. The cold bending electrical protective casing is prepared from the following components by weight: 75 kg of PVC resin, 3.8 kg of composite stabilizer, 0.5 kg of stearic acid, 0.5 kg of chlorinated polyethylene, 3 kg of titanium dioxide, 0.6 kg of paraffin, 30 kg of light calcium carbonate and 1 kg of 401 auxiliary agent. The formula of the cold bending electrical protective casing is not influenced by seasonal temperature. The 401 processing modification auxiliary agent is added after adjustment, so that plasticizing, toughening and weathering resistance of the PVC product are promoted by a low-temperature modification toughing agent. By adding 401 into the PVC product, the PVC gelling and plasticizing effects can be promoted. Through plasticizing process operation, the PVC multiple particle structure is damaged, the release of primary particles of the PVC is promoted, a PVC extrusion processing process is formed, the plasticizing is quick, the viscosity is increased, and the thermal state strength is improved.

The invention discloses a device for hatching and culturing Salmonidae fishes with a controllable temperature, which relates to a fish hatching and culturing device and aims at solving the problems that the hatching rate and survival rate of Salmonidae fishes are low due to the poorer culturing environment and the uncontrollable culturing environment when hatching floating larva and culturing newly hatched young fries in the prior art. The device is characterized in that a closed separation zone, a water storage tank and a refrigeration zone are arranged on the upper part in an aquarium; the closed separation zone is communicated with one end of a water return pipe; a filter layer, a heating rod, a water pump and an aerating pore plate are arranged in the water storage tank; the other endof the water return pipe is communicated with the water storage tank and is arranged above the filter layer; the aerating pore pipe is communicated with an oxygen pump which is arranged outside the aquarium; the water pump is communicated with an ultraviolet light sterilizing device which is arranged outside the water storage tank through a pipeline; the ultraviolet light sterilizing device is communicated with the refrigeration zone through the pipeline; a temperature sensor is arranged in the refrigeration zone; the refrigeration zone is communicated with the closed separation zone through the pipeline; and the refrigeration zone is communicated with a compressor which is arranged outside the aquarium through an expansion valve. The device can be used for hatching and culturing the Salmonidae fishes.

The present invention discloses an emulsifying-type aerobic fermentation tank. According to the aerobic fermentation tank in the prior art, increase of compressed air consumption and improvement of stirring motor power can not significantly increase specific yield, and can cause energy consumption increasing, product cost improving, equipment cost increasing and operating environment deterioration. The emulsifying-type aerobic fermentation tank of the present invention comprises a tank body and a gas-liquid mixing circulation apparatus, wherein the gas-liquid mixing circulation apparatus is located inside the tank body, and has at least two stages of gas-liquid mixers. The gas-liquid mixing circulation apparatus is arranged vertically. The tank body is provided with a tank body gas inlet pipe and a fermented liquid inlet pipe. The tank is characterized in that: a self-suction air ejection emulsifying supercharging device is arranged between the gas-liquid mixing circulation apparatus and the inner wall of the tank body. With the tank of the present invention, oxygen utilization rate, mass transfer rate, dissolved oxygen coefficient and specific yield are improved, energy is substantially saved, the equipment is simplified, the microbiological contamination rate is reduced, the equipment cost and the maintenance cost are reduced, and the service life of the fermentation tank isprolonged.

The invention relates to a spiral nanometer carbon fiber, in detail the manufacturing method of spiral nanometer carbon fiber. In the invention the acetylene is carbon source, the hydrogen is carrier gas, the nitrogen or argon gas is diluent air, the nickel plate is catalyst, the PCl3 is cocatalyst. The spiral nanometer carbon fiber is produced by CVD in lower temperature. The invention is provided with simple method and process, easy control, low cost, high output and purity, and convenience industrial production. Prepared spiral nanometer carbon fiber is provided with wide application prospect in strengthening structure, absorbing material and microelectronic device so on.

The invention relates to the technical field of agricultural planting, and discloses a wheat-corn relay interplanting planting method. In the method, a mode of alternating wheat planting zones and corn planting zones is adopted, and wheat is planted before corn is planted; four rows of wheat are used as one planting zone; row spacing between the second row of wheat and the third row of wheat ranges from 25 to 35 centimeters in the planting zone, and the row spacing between the rest two adjacent rows of wheat is 20 centimeters; an empty row with the width of between 125 and 135 centimeters is reserved between the two wheat zones and is used for planting the corn zones; two rows of corn are used as one planting zone; row spacing among corn is 45 centimeters; and the space between the adjacent corn and wheat ranges from 40 to 45 centimeters. By the method, the row number of planting the wheat is reduced, and the wheat is planted in a mode of wide-narrow row spacing, namely compared with the original row spacing, the row spacing of the corn is reduced by 5 centimeters, so the space between the wheat and the corn is increased; and the planting environment of intergrowth period of the wheat and the corn is optimized, the shading effect of the wheat on the corn is relieved, and the specific yield and yield per unit area of both the wheat and the corn are improved simultaneously.

The invention provides a medium for fermentation production of FR901379 and a method thereof. The medium comprises the following components in parts by mass: 120-160 parts of fructose, 10-20 parts ofcorn gluten meal, 5-10 parts of casein, 5-10 parts of yeast peptone, 1-3 parts of magnesium sulfate, 0.5-1 part of dipotassium hydrogen phosphate, 2-4 parts of calcium carbonate, and 0.5-1 part of anantifoaming agent. The invention also provides a method for culturing a bacterial strain Coleophoma empetri in the medium to obtain FR901379. The fermentation medium and the produced FR901379 can obviously reduce the broth consistency, improves oxygen dissolving condition during a fermentation process, promotes the thalline secondary metabolism, and obviously increased the output of FR901379.

The invention relates to a fishbone carbon nanofiber for filling nano-metals, in particular to the preparation method of the fishbone carbon nanofiber for filling nano-metals. The invention discloses a method for preparing the fishbone carbon nanofiber for filling nano-metals. The invention can prepare the fishbone carbon nanofiber for filling nano-metals at lower temperature by chemical vapor deposition by adopting acetylene as carbon source, hydrogen gas as carrier gas, nitrogen gas or argon gas as dilution gas, nickel plate as catalyst and thiophene as co-catalyst. The inventive method has the advantages of simple process, easy control, low cost, and high output and purity, and is suitable for industrial production. The fishbone carbon nanofiber for filling nano-metal prepared by the method has the advantages of uniform diameter and high graphitization degree, and has wide application prospect in the fields of gas adsorption, catalytic reaction, structure enhancement, wave-absorbing material, electromagnetic screening material, microelectronic device, etc.

The invention discloses a water body oxygen aeration device which comprises an oxygen aeration tank. The water body oxygen aeration device is characterized in that the oxygen aeration tank is provided with a low-oxygen water body inlet, a high-oxygen water body outlet and an oxygen inlet. The low-oxygen water body inlet is connected to a culture pond through a water pump. The water pump pumps a water body in the culture pond into the oxygen aeration tank. The oxygen inlet is connected with a pure oxygen source. Oxygen enters the oxygen aeration tank from the oxygen inlet and is fully mixed with the water body pumped by the water pump in a high-pressure environment. A high-oxygen water body after being mixed with the oxygen is drained back into the culture pond from the high-oxygen water body outlet. According to the water body oxygen aeration technology and the device of the technology, under the circumstance of high pressure, the oxygen is dissolved into the water, the dissolved oxygen in the water is supersaturated and enters the culture pond through a pipeline, the purpose of increasing the dissolved oxygen is achieved, high-density culture can be achieved, the oxygen dissolving efficiency of the unit water body is promoted, the unit yield of the oxygen aeration water body is high, and the concentration of the saturated dissolved oxygen of the water is improved.

The invention provides a fed air conditioning system of a gas-steam combined cycle power plant and a use method of the fed air conditioning system. The air outlet end of a gas turbine is communicated with a heat recovery boiler; the heat recovery boiler is communicated with a steam turbine. The fed air conditioning system comprises a surface air cooler unit and a lithium bromide absorption chiller, wherein the air outlet end of the surface air cooler unit is communicated with the air inlet end of the gas turbine; a heat exchange water pipe is arranged in the surface air cooler unit and is communicated with the heat recovery boiler; the lithium bromide absorption chiller is communicated with the heat exchange water pipe. The fed air conditioning system is used for increasing the unit output under summer working conditions, and simultaneously improving the unit efficiency under winter working conditions and the unit efficiency under partial loading working conditions, so that the occurrence of the supply-demand non-matching problem of the unit and a power grid at different running stages is reduced, and simultaneously the running economy and flexibility of the gas-steam combined cycle power plant are improved.

The invention relates to a process for preparing a viable bacillus megaterium preparation. According to the process, after bacillus megaterium undergoes first-stage germ amplification culture and second-stage germ amplification culture, the bacillus megaterium is inoculated to a fermentation culture medium for culture, and the number and conversion ratio of bacilli is increased through feeding a supplement carbon source during fermentation, so that the unit yield is increased remarkably, and the unit cost is reduced; at the end of fermentation, fermentation liquor is concentrated with a vacuum film concentrator, so that soluble synergistic substances, growth promoting substances and bacteriostatic active substances can be effectively recovered from the fermentation liquor; the concentrated fermentation liquor is subjected to drying and granulating by multi-level low-temperature spray-fluidized drying equipment, granules are subjected to sorting, fine powder gathered by a cyclone separator returns and is granulated again, and then, a bacillus megaterium product, of which the CFU of powder per gram is not less than 8.0*10<10>, is obtained; exhaust gas is treated and is discharged after reaching standard. The process has the advantages that effective substances in the fermentation liquor can be reserved to the maximum, the quality of the product is high, the equipment utilization ratio is high, the retention of biological activity is relatively good, waste gas and waste water are discharged after reaching standard, and large-scale industrial production can be achieved.

The invention relates to the technical field of aquaculture, and concretely relates to an intercultivation method for oreochromis mossambicus and white prawns. The method comprises the following steps: (1) pond treatment; (2) fry throwing and culturing; (3) cultivation management; and (4) water quality management. The invention aims to provide the intercultivation method for the oreochromis mossambicus and the white prawns, white prawn intercultivation in an oreochromis mossambicus pond can fully utilize cultivation water space, reduce prawn cultivation costs, effectively control prawn diseases and infection, and improve cultivation economic benefits.

The invention discloses a vertical mill operation closed loop control device and method based on data excavation; the vertical mill operation closed loop control method comprises the following steps: using an integral characteristic screening method to excavate and parse condition data so as to obtain vertical mill health state evaluation indexes; carrying out cluster excavation analysis for the condition states so as to obtain characteristics of each condition cluster, thus obtaining various state distribution conditions in history conditions; defining operation state types in the history conditions, thus obtaining a stable mode condition database; using an ARIMA algorithm to using characteristic values determined in a vertical mill health state characteristic obtain unit to train a model, thus predicting parameter change trends, and using predicted values to assist state identification; combining with the predicted values given by the ARIMA model to determine the vertical mill operation state; reading condition records from the stable condition mode database when the vertical mill operation state is determined to be abnormal, thus obtaining recommended control object values; considering slag moisture and micro powder specific surface area detection results, carrying out closed loop control for controllable parameters at the moment, thus realizing long term stable operation of the vertical mill.

The invention relates to water-soluble carminic acid color lake. The molecular formula is C44H43O32MA1, wherein M is one of Ca, 2Na, 2K or 2NH4. An SDS-PAGE analytic method is adopted for detecting protein in the water-soluble carminic acid color lake, and the water-soluble carminic acid color lake has no potential allergen protein of which molecular weight is higher than 6,000Da. The water-soluble carminic acid color lake is widely applied to food products, candies, beverage, drugs and cosmetics.

The invention discloses a cultivation method of water-saving irrigation for corn. The method comprises following steps: (1) selecting lands; (2) selecting certified seeds suitable for the local condition; (3) processing seeds; (4) mounding; (5) laying drip irrigation pipes; (6) deep ploughing and conserving water with soil; (7) applying base fertilizer; (8) covering film and sowing; (9) irrigatingand topdressing; (10) reasonably close planting and economically using water; (11) enhancing field management to enhance drought resistance: (a) early thinning and final thinning; (b) intertillage for promoting root; (c) management of fertilizer and water; (d) covering with film and grass; (e) preventing and controlling disease and pests; (10) harvest. The method of the invention improves the unit yield, realizes increasing production and efficiency, and has the functions of reducing soil wind erosion, protecting the environment and improving the drought resistance and stable yield of crops;according to the growth law and nutrient requirement of maize, the planting method, fertilizer application method and field management method of maize were optimized, and the yield of maize was improved obviously.

The invention discloses ultra-high-molecular-weight polyethylene monofilament filter cloth and a preparation method thereof. The filter cloth is in a single-layer structure or a double-layer structure, wherein warps of the filter cloth with the single-layer structure are woven by one monofilament and wefts are woven by another monofilament; the diameter of each monofilament is 0.07mm-0.2mm; the arraying ratio of exterior and interior warps to exterior and interior wefts of the filter cloth with the double-layer structure is 4 to 1; a tying method is a tying weft method; the warps of exterior tissues and interior tissues are woven by one monofilament and the wefts are woven by another monofilament; the diameter of the monofilament of each exterior tissue is 0.07mm-0.2mm and the tensile strength is more than 1100MPa; and the diameter of the monofilament of each tissue is 0.6mm and the tensile strength is more than 1000MPa. The monofilaments are woven by ultra-high molecular weight polyethylene through a melt spinning method, and are obtained by heat shaping and calendering treatment in sequence after weaving. The filter cloth disclosed by the invention has the advantages of high strength, good surface performance, long service life and the like; and the preparation process is simple and the cost is low.

The invention discloses a process for extracting vanadium from stone coal by an acid method for performing curing pretreatment on raw ore, which mainly comprises the steps of raw ore grinding, acid leaching, liquid-solid separation, solution pretreatment, extraction and back-extraction, oxidation, vanadium precipitation, red vanadium obtaining and deamination. Before the step of acid leaching, the process also comprises raw ore curing pretreatment steps, namely, smashing the raw ore and filling the smashed raw ore in a furnace, curing and heating the smashed raw ore, taking a clinker out and wet milling the clinker. The invention can destroy the isomorphism of vanadium, remarkably improve the leaching rate of V2O5, and can improve the leaching rate of the V2O5 from 30-50 percent to 65-75 percent, reduces iron content in a solution by half to one third, improves filtering and depositing performances of acid dipping slurry, has no environmental pollution because no chemical agent is added in the curing step, and achieves the aim of saving energy and reducing emission by comprehensively using the own heat energy of the stone coal.

The invention discloses a method for preparing trimanganese tetroxide with a micro-nanostructure. The method comprises the steps: adding a manganese powder to an alcohol-water mixed solution, taking an ammonium salt as a catalyst, heating to 40-115 DEG C, and carrying out a stirring reaction for a period of time to obtain white manganese hydroxide; and then introducing air to a manganese hydroxide solution for 2-10 h, washing and drying, and grinding to obtain the trimanganese tetroxide product with the micro-nanostructure. The reaction is carried out at low temperature and ordinary pressure, the preparation process is simple, and the cost is low. The prepared trimanganese tetroxide product has relatively high specific surface area.

The invention discloses a bonding method of silicon carbide seed crystals and a preparation method of silicon carbide single-crystal ingot. The bonding method of the silicon carbide seed crystal comprises the following steps: mixing silicon carbide powder, carbon powder and silicon powder, adding a binder, uniformly carrying out mixing to obtain mixed powder, coating a silicon carbide wafer with the mixed powder, placing the silicon carbide seed crystals on the mixed powder, and enabling the seed crystals to be tightly bonded with the silicon carbide wafer under an inert atmosphere at a temperature of 1500-2000 DEG C to obtain the silicon carbide bonded seed crystals, wherein no impurities are introduced. When the silicon carbide bonded seed crystals obtained through the method is used ingrowing the silicon carbide single-crystal ingot through a physical vapor transport (PVT) method in a silicon carbide crystal growth furnace, heat conduction is rapid, heat transfer is uniform, and the high-quality silicon carbide single-crystal ingot can be obtained. According to the method, the feeding space and the feeding amount of the raw materials are increased, so that the size of a singlecrystal ingot is increased, the wafer output of a single crystal ingot is increased, and operation cost of the silicon carbide crystal growth furnace is reduced.

The invention relates to a process for preparing a viable bacillus licheniformis preparation. According to the process, after bacillus licheniformis undergoes first-stage germ amplification culture and second-stage germ amplification culture, the bacillus licheniformis is inoculated to a fermentation culture medium for culture, and the number and conversion ratio of bacilli is increased through feeding a supplement carbon source during fermentation, so that the unit yield is increased remarkably, and the unit cost is reduced; at the end of fermentation, fermentation liquor is concentrated with a vacuum film concentrator, so that soluble synergistic substances, growth promoting substances and bacteriostatic active substances can be effectively recovered from the fermentation liquor; the concentrated fermentation liquor is subjected to drying and granulating by multi-level low-temperature spray-fluidized drying equipment, granules are subjected to sorting, fine powder gathered by a cyclone separator returns and is granulated again, and then, a bacillus licheniformis product, of which the CFU of powder per gram is not less than 2.0*10<11>, is obtained; exhaust gas is treated and is discharged after reaching standard. The process has the advantages that effective substances in the fermentation liquor can be reserved to the maximum, the quality of the product is high, the equipment utilization ratio is high, the retention of biological activity is relatively good, waste gas and waste water are discharged after reaching standard, and large-scale industrial production can be achieved.

The present invention belongs to a method for synthesizing biological diesel oil by adopting fixed bed gas-phase esterification reaction, in the concrete, said invention provides a method for synthesizing biological diesel oil by using animal and plant oil and fat and low-carbon alcohol (for example methyl alcohol) as raw material and making the above-mentioned raw material be reacted with fixed granular esterification catalyst in the fixed bed under the gas condition. Said invention also provides the equipment for implementing said method and catalyst required for fixed bed esterification reaction.