30results about How to "Extended ripening process" patented technology

The invention discloses an arid region heavily-salted original soil afforesting method. The arid region heavily-salted original soil afforesting method includes the steps that sand doping is firstly carried out to improve the physical structure of soil in a planting area, annual growth halophyte is planted in the first year to achieve afforesting and soil partial desalting, ridging is carried out in the second year to construct furrow terrains, tamarix chinensis, amorpha fruticosa and sweet clover which are resistant to salt are planted on ridges in a trickle irrigation mode to achieve biological salt moving and soil fertilizing, and suaeda salsa is planted in furrows in a trickle irrigation mode to increase the earth surface cover degree, improve physical-chemical properties of soil and desalt the soil. By means of the arid region heavily-salted original soil afforesting method, the physical improvement and the biological improvement of the salted soil are integrated, the technical measures of furrow cultivation and water saving trickle irrigation are combined, the arid region heavily-salted original soil afforesting method is easy and convenient to operate and low in cost, and the stability and the sustainability of the heavily-salted original soil afforesting are achieved.

The invention discloses a soil conditioner applied to mine ecological restoration in an arid region as well as preparation and application methods thereof. The soil conditioner is prepared from the following raw materials: potassium polyacrylate, decomposed coal, biological potassium fulvate of sugar factory byproducts, natural zeolite powder and a compound microbial agent. The preparation method comprises the following steps: uniformly mixing the potassium polyacrylate, decomposed coal, biological potassium fulvate and natural zeolite powder in parts by weight; and adding water and diluting the compound microbial agent according to a ratio of 1:100, uniformly spraying, uniformly mixing again, and balancing for 10-20 days. The soil conditioner can be used for soil replacement covering engineering for repairing flat slope surface or slope surface with gentle slope in mining area and also can be used for ecological bag slope repair engineering for repairing soil sediment slope surface in mining area with steep slope and poor soil conditions. The soil conditioner can achieve the effects of obviously improving the plant emergence rate, improving water and nutrient conditions, improving physical and chemical properties of soil, increasing soil activity, accelerating the soil-ripening process and promoting vegetation growth.

The invention discloses a method for constructing an artificially natural slope-type terrace land in the Three Gorges reservoir area. The method comprises the following steps of: (1) calculating rill erosion critical slope length of a gentle slope by utilizing a rill erosion generation critical value and a tillage erosion theory; and (b) sequentially constructing sand-blocking terrace banks along the slope according to interval positions larger than the rill erosion critical slope length, wherein the bottom surfaces of all the sand-blocking terrace banks extend into soil below an original slope line, the top surfaces of all the sand-blocking terrace banks are higher than the original slope lines, and between every two adjacent sand-blocking terrace banks, the top surface of the next-stage sand-blocking terrace bank and the bottom surface of the last-stage sand-blocking terrace bank are located on the same isohypse line. The sand-blocking terrace banks are ridge-type sand-blocking terrace banks or simple civil-engineering-type sand-blocking terrace banks or plant-fence-type sand-blocking terrace banks. The method has the characteristics of low cost, easiness for popularization, high benefit and the like.

The invention discloses a critical medium injection oil shale single-well huff and puff transformation process. The critical medium injection oil shale single-well huff and puff transformation process has the advantages that a working well is drilled at first to form a single-well mode, perforation is carried out on the locations of oil shale strata at the bottom of the well, accordingly, the porosity of oil shale can be increased, and the permeability of the oil shale can be improved; water and gas are injected into the working well and are heated, so that preset critical environments can be created at the bottom of the well, pyrolysis of organic matters in the oil shale can be completely carried out under extraction and catalysis effects of critical media, the oil shale can be ultimately extracted step by step from the inside to the outside along with gradual permeation of the critical media into the oil shale, and oil and the water can be separated from each other after obtained oil and water mixtures are extracted to earth surfaces, so that shale oil and shale gas can be obtained; the separated critical media can be recycled and injected after reaction is completely carried out, so that waste heat can be reused; the exploitation cost can be reduced, and the exploitation efficiency can be improved.

The invention discloses a planting method of annual interplanting and intercropping in a mulberry field. The planting method is to plant mulberry, potato and sweet potato. According to the invention, crops are reasonably interplanted and intercropped in the mulberry field, and the mulberry and crops grow together and realize mutual influence and mutual promotion. Interplanting and intercropping in the mulberry field can give full play to mutualistic action among organisms, and bring out the best in each other, so benign growth of the mulberry with the interplanted and intercropped crops is realized. The planting method provided by the invention can reduce the waste of resources in the mulberry field, improves the yield per unit area of the mulberry field, makes full use of rural winter-fallowed labor and develops ecological sericulture industry.

The invention discloses a planting method for ecological restoration type liquorice. The method comprises the processes of seed treatment, sowing, transplanting, fertilization and irrigation, insect pest prevention and digging. In the seed treatment process, seeds of Ningxia liquorice and Ural liquorice are collected; in the sowing process, the seeds are shallowly sown in July every year; in the transplanting process, rhizobium leguminosarum, fresh beneficial microbial population animal nature fertilizer in rumens of cattle and sheep and stains used as beneficial bacteria in the forage grass manufacturing ensilage process are transferred to the roots of liquorice seedlings; in the fertilization and irrigation process, organic farmyard manure is applied, and irrigation is performed five times every year; in the insect pest prevention process, a biological method is adopted for preventing insect pests; in the digging process, when basically-mature liquorice which grows for 3-5 years and reaches the medicinal commercial grade is dug, more than 80% of production stock plants are reserved, and at most 20% of medicinal commercial grade liquorice can be dug. By means of the method, management of the ecological environment and recovery of steppe ecology are achieved, sustainable development of liquorice land is ensured, maximization of economic and ecological benefits is achieved, and the planting method can be widely applied and popularized.

The invention provides a production method of a biochar-based organic special fertilizer for tomatoes, which is prepared from the following components in parts by weight: 20-25 parts of biochar, 45-50parts of organic matter, 6-9 parts of nitrogen (N2), 3-5 parts of phosphorus (P2O5), 6-9 parts of potassium (K2O), 1-3 parts of potassium sulfate, 3-5 parts of ammonium molybdate, 0.5-1 part of humicacid, 1.5-2.5 parts of wood vinegar, 1-2 parts of wood tar, 0.05-1 part of beneficial microbial inoculum, 0.5-1 part of fertilizer controlled release agent and 1 part of forming aid. The organic matters are solid livestock and poultry manure with the water content of less than or equal to 30% and decomposed organic plants. The preparation method comprises the following steps: carrying out high-temperature pyrolysis on crop straws to prepare charcoal, carrying out mixed fermentation on the charcoal and organic matters for 10-20 days, adding the components, mixing and granulating the mixture byusing a granulator, and finally spraying wood tar onto the granular fertilizer. The special fertilizer contains a large amount of nutrient elements such as nitrogen, phosphorus and potassium and trace elements such as zinc and iron, so that waste resources are effectively utilized, soil is improved, the number of soil microorganisms is increased, and tomatoes are high in quality and yield.

The invention relates to the technical field of vegetable storage, in particular to a preservation method for prolonging the guarantee period of a vegetable. The preservation method comprises the following steps of: collecting vegetables, preprocessing the vegetables, putting the vegetables in a box and carrying out preprocessing, wherein the preprocessing comprises the steps of: carrying out microwave heating processing, adding preservatives, coating with a preservative film, coating with a preservation bag, preparing a preservation paper box, adding vegetables in the paper box, sealing, andpackaging. By use of the preservation method for prolonging the guarantee period of the vegetable, before the vegetables are put in the paper box and stored, the vegetables are subjected to design, including microwave heating processing, preservative adding, preservative film coating and preservation bag coating, the guarantee period of the vegetables can be effectively prolonged, and a preservation effect in a vegetable storage process is greatly enhanced. In addition, the inner surface of the preservation paper box is smeared with one layer of adsorptive stone powders so as to perform a goodadsorption effect on various gases which enter from the outside, oxygen and other gases can be effectively prevented from entering the vegetables, and therefore, the vegetables can achieve a better preservation effect in a storage process.

The invention discloses a method for reducing the content of fructan in rice and flour food through microwave curing, and belongs to the technical field of food processing. The fermented rice and flour product is prepared by microwave curing, and fructan in the fermented rice and flour food can be effectively degraded. Compared with traditional steaming, the method has the advantages that the content of fructan in the fermented food can be remarkably reduced, the intestinal stress sensitivity of IBS patients to eating the fermented rice and flour food is effectively relieved, the daily diet requirements of special crowds are met, the process is simple and convenient, processing is green and environmentally friendly, and the method is suitable for large-scale industrial production.

The invention discloses a preparation method of a natural fruit preservative and belongs to the technical field of preservative preparation. The preparation method comprises the steps that fermentation processing is firstly conducted on distilled water, apple and mango juice and yeast extract, yeast powder and the like, then the mixture obtained after fermention is grinded into slurry, ball-milling treatment is conducted on the slurry and fructus forsythiae, tea, radix stemonae and the like, the mixture is collected for sterilization and disinfection, the obtained nutrients are evenly stirred with spirulina polysaccharide, sodium chloride and ammonia water, then the mixture is mixed with bacillus natto for fermentation, ultrasonic oscillation and centrifugal treatment are conducted on the fermentation product and an ethanol solution, finally supernate is collected, and rotary evaporation, sterilization and disinfection are performed to obtain the natural fruit preservative. The used raw materials are natural and non-toxic, have high food security and do not cause damage to human bodies, and the prepared fruit preservative has the good preservation effect on various fruits, can greatly prolong the fruit refreshing time, does not affect the taste of the fruits after being used and has wide application prospect.

The invention discloses a method for culturing artificial pit mud of multi-grain Luzhou-flavor liquor. The method comprises the following steps of S1, preparing yellow mud pies; S2, preparing pit skinmud pies; S3, mixing and adding activated carbon fibers to prepare basic mud pies; S4, preparing high-quality pit mud pies; and S5, mixing the mud pies, adding a nutritional material and a fermentation promoter, and performing fermentation to prepare the artificial pit mud. The fermentation promoter is prepared by the following steps of A1, preparing aroma-producing yeast liquid; A2, preparing bacillus subtilis culture liquid; A3, preparing neutral protease activation liquid; and A4, taking soybean meal and bran as matrixes, carrying out mixed culture on aroma-producing yeast and bacillus subtilis, and performing drying to obtain the fermentation promoter. According to the invention, the problems that in the prior art, the quality of the artificial pit mud is poor, the variety and quantity of strains do not reach the standard, the culture time of the artificial pit mud is long, and the yield is low are solved.

The invention discloses a freshness-preserving agent for guava fruits and a preparation method thereof. The freshness-preserving agent for guava fruits is prepared from folium isatidis, hawthorn fruits, liquorice roots, mongolian dandelion herb and starch. The freshness-preserving agent disclosed by the invention is capable of effectively reducing moisture loss from surface of fruits, retaining relatively high nutrient content of fruits and vegetables, and prolonging ripening process of fruits and vegetables. Fruits and vegetables preserved with the freshness-preserving agent have slight natural aroma of Chinese herbal medicines, and are unique in flavor and endowed with nourishing and health-caring values. The freshness-preserving agent disclosed by the invention is a natural freshness-keeping agent which utilizes Chinese herbal medicines as raw materials. Being used for preserving guava fruits, the freshness-preserving agent is capable of retaining color, aroma, flavorand tissue state of the fruits, as well as achieving long freshness keeping time without causing toxic and side effects. Moreover, the preparation method of the freshness-preserving agent for guava fruits disclosedby the invention is simple and convenient to operate; and the materials are cheap and easy to get so that industrial production can be implemented.

The invention discloses a method for intercropping lilium brownii in mulberry field. Mulberry trees and lilium brownii are adopted in the method. The mulberry field is utilized in a three-dimensionalmode, and the potential productivity of the mulberry field is hard exploited, so that the land productivity of the mulberry field and the comprehensive benefits of the mulberry field are further improved. Natural resources are transformed in the mulberry field production, and the productivity of the mulberry field mainly depends on the utilization ratio of biocenoses in the mulberry field to lightenergy and other natural resources in time and space. Other crops are intercropped in the mulberry field to form a multi-layered and multi-species three-dimensional biocoenosis structure, and the utilization efficiency of the light energy, nutrition space and various nutrients in different layers of soil is increased.

The invention belongs to the technical field of health care wine preparation, and discloses a preparation method of cordyceps militaris health-care wine. According to the method, fresh cordyceps militaris sporophore is adopted as a raw material, and the cordyceps militaris health-care wine is prepared through fermentation, the rich protein components in cordyceps militaris are converted into smallmolecular substances such as small molecular peptides and amino acids which are easily absorbed by human bodies, the content of functional components such as cordycepin, adenosine and cordyceps polysaccharide in cordyceps militaris is effectively kept, and the defects that in the prior art, the dissolution rate of effective components of cordyceps militaris is low, the content of nutritional components is low, and the taste is poor are effectively overcome. The cordyceps militaris health-care wine obtained by the method disclosed by the invention is high in nutrient content, the cordycepin content can be up to 800mg / L, the adenosine content can be up to 50mg / L, and the cordyceps militaris health-care wine is unique in taste, rich in fragrance and mellow in wine body, and has the effects of resisting fatigue, enhancing the immunity of a human body and the like.

The invention belongs to the technical field of aluminum alloy furniture, and particularly discloses a rapid press-fit device for aluminum material production and processing for aluminum alloy furniture. The following scheme is put forward with regard to the problems of low press-fit efficiency and single function: the rapid press-fit device comprises a support bottom plate, wherein equidistantly-distributed support rods are welded to one side of the outer wall of the top of the support bottom plate, and the same fixed plate is welded to the outer walls of the tops of the support rods; an operation panel is fixed to the outer wall of the top of the fixed plate through a bolt; and equidistantly-distributed automatic telescopic rods are fixed to the outer wall of the top of the support bottom plate through bolts, and a shock absorption spring sleeves the circumferential outer wall of an extension rod of each automatic telescopic rod. According to the rapid press-fit device disclosed by the invention, the press-fit working efficiency is increased, the practicability of the device is improved, the curing and pasting intensity for an aluminum material are increased, and the quality of the finished product is improved; cutting equipment is enabled to be convenient to move, so that the cutting efficiency is increased; and manual angle adjustment is not needed, so that the labor intensity of working personnel is reduced, and the application range of the device is expanded.

The invention belongs to the field of alloy treatment, and discloses a novel vanadium-nitrogen microalloy and a preparing method thereof. The novel vanadium-nitrogen microalloy comprises, by mass, 100parts of a vanadium compound, 24-39 parts of a novel biochar reducing agent, 1-3 parts of ammonium bicarbonate or ammonium chloride and 0.1-2 parts of a density strength agent. The preparing method comprises the steps that the vanadium compound is ground through a pulverizer; the novel biochar reducing agent and the ground vanadium compound are mixed, then, the density strength agent, the ammonium bicarbonate or the ammonium chloride and the water are added, and uniform mixing is conducted according to a certain proportion; and the mixture is pressed and formed. Compared with a previous vanadium-nitrogen microalloy and a preparing method thereof, the curing and reducing speed is increased, the problems about product ball exploding, ball cracking and ball adhering are solved, the product quality is improved, meanwhile, the damage rate of a kiln is reduced, the kiln maintaining cost is saved, and accordingly the production cost is greatly reduced.

The invention discloses a processing method of purslane bean curd. The processing method of the purslane bean curd comprises the following steps: (1) fixation: carrying out transient fixation treatment on cleaned purslane at the high temperature of 115-120 DEG C; (2) fermenting: spraying bacteria agent liquid on the water-removed purslane, and carrying out fermenting treatment; (3) baking, filling a baking oven with carbon dioxide to bake the purslane; (4) freeze drying: carrying out freeze drying on the purslane and then carrying out pulverization treatment on the purslane; (5) grinding into thick liquid: mixing purslane micro-powder and soaked soybeans and then grinding the mixture twice, and filtering and ultrasonically oscillating the mixture to obtain soybean milk; and (6) processing: adding gypsum liquid in the soybean milk, and cooking the soybean milk to obtain the purslane bean curd. The shelf time of the processed purslane bean curd can be prolonged to be 10 hours, the content of water-soluble organic calcium in the bean curd is increased by 8.4 mg / 100 g, the probability that calculi are produced after a person eats the purslane bean curd can be reduced, the bean curd tastes delicate and is easy to digest, and breakage resistance in cooking is good.

The invention relates to a high-speed digital energy-saving forming machine and a forming method thereof, and aims to solve the problems that a forming machine in the prior art is likely to be blocked, low in working efficiency and high in energy consumption. According to the technical scheme, the high-speed digital energy-saving forming machine comprises a rack, feeding devices, a curing device, a cooling device, a discharging device, a mold frame and a translation device. The feeding devices are connected with the mold frame through material guns. A mold hanging bracket is further arranged on the rack and connected with the mold frame. Each feeding device comprises a material barrel stand, a feeding barrel, emptying valves, a negative pressure valve, a pressurizing mechanism, a feeding pipe and an air cylinder, wherein the material barrel stand is mounted on the rack, the feeding barrel is mounted on the material barrel stand, the emptying valves, the negative pressure valve and the feeding pipe are all mounted on the feeding barrel, the pressurizing mechanism comprises a pressurizing pipe, a pressurizing balance valve, a pressure sensor and a pressure feedback pipe, the pressurizing pipe is connected with the feeding barrel, and the pressurizing balance valve is mounted on the pressurizing pipe. The high-speed digital energy-saving forming machine is high in curing and cooling speed, high in working efficiency and low in energy consumption.

An apparatus for the production of filters for cigarettes or other smoking articles, comprises filter making means (10) and conveyor means (40; 41, 42) for feeding the produced filters (F) to a drying chamber (30) adapted to cause accelerated aging of the filters (F). To the drying chamber (30) there is associated a radiofrequency generator device (50), for generating a high frequency oscillating electric field in which said filters are immersed. The apparatus further comprises means for varying the speed at which said filters goes through said drying chamber, on the basis of at least one detected parameter, which is indicative of the humidity contained within said filters, so that, for a given power of said radiofrequency generator device (50), the residence time of the filters within said drying chamber is adjusted so as to ensure a substantial elimination of the humidity content from the filters.

The invention relates to a method for preparing medium-purity terephthalic acid by gradual heating oxidation. The method comprises the steps of sending paraxylene, acetic acid solvent and cobalt manganese bromide catalyst into a main oxidation reactor for catalytic oxidation reaction; sending slurry comprising coarse terephthalic acid solid output by the main oxidation reactor to a first two-stage heating oxidation reactor and a second two-stage heating oxidation reactor sequentially to cure crystals and remove 4-CBA impurity; and crystallizing to obtain the medium-purity terephthalic acid. The method provided by the invention can omit complex refining process, reduce the water consumption and improve the energy utilization ratio.

The invention discloses artificial pit mud containing Yuncheng salt lake black mud and a preparation method thereof. The artificial pit mud is prepared from the following raw materials in parts by weight: 40 to 50 parts of fresh dry yellow mud, 5 to 8 parts of turf, 3 to 5 parts of bran vinegar residues, 1 to 2 parts of malt extract, 0.5 to 0.8 part of molasses, 0.1 to 0.2 part of froggrass dry powder, 10 to 15 parts of Yuncheng salt lake black mud, 4 to 5 parts of high-quality aged pit mud, 20 to 30 parts of yellow water, 5 to 6 parts of after-run, 1 to 2 parts of koji powder, 0.1 to 0.2 part of tryptone, 0.1 to 0.2 part of agarose, 0.2 to 0.3 part of dipotassium phosphate, 0.1 to 0.2 part of sodium acetate, 0.1 to 0.2 part of magnesium sulfate and 10 to 15 parts of distilled water.

The invention discloses a planting method of double-cropping interplanting and intercropping in a mulberry field. The planting method is to plant mulberry, broad bean and soybean. According to the invention, crops are reasonably interplanted and intercropped in the mulberry field, and the mulberry and crops grow together and realize mutual influence and mutual promotion. Interplanting and intercropping in the mulberry field can give full play to mutualistic action among organisms, and bring out the best in each other, so benign growth of the mulberry with the interplanted and intercropped crops is realized. The planting method provided by the invention can reduce the waste of resources in the mulberry field, improves the yield per unit area of the mulberry field, makes full use of rural winter-fallowed labor and develops ecological sericulture industry.

The invention discloses a fresh-keeping storage method for navel oranges, belonging to the technical field of fruit fresh-keeping. The method for fresh-keeping and storing navel oranges comprises the following steps: (1) selecting navel oranges with bright color, uniform shape and size, sufficient moisture, and no fruit disease and damage; (2) placing the sorted navel oranges in a rinse solution for cleaning , pre-cooling treatment in cold storage; (3) Soak navel oranges in preservatives, which are mixed with Chinese herbal medicine extracts and natural preservatives; (4) Place navel oranges in a cool and ventilated place, and then degas them in vacuum Processing in the machine; (5) Cover the navel oranges with a foamed polyethylene mesh cover and pack them into boxes; (6) Put the boxed navel oranges into the warehouse for storage. In the present invention, navel oranges are soaked in a preservative mixed with Chinese herbal medicine extracts and natural preservatives, which has a better fresh-keeping effect, and the use of Chinese herbal medicine extracts to preserve fresh navel oranges has the advantages of no chemical toxicity, no residue, no side effects, etc. Suitable for promotion.

The invention relates to a method for curing and sterilizing culture media, in particular to a method for curing and sterilizing culture media for large-scale cultivation of cordyceps militaris. The method for curing and sterilizing culture media for large-scale cultivation of cordyceps militaris is characterized in that the steps of curing and sterilizing are performed in combination; the temperature of curing and sterilization is between 100 and 135 DEG C; the time for curing and sterilization is between 40 and 50 minutes; curing and sterilization are synchronously performed in a double-door tunnel-type pressure steam sterilizer with a front door and a back door; the back door of the double-door tunnel-type pressure steam sterilizer is automatically locked when the front door is fed; and the front door of the double-door tunnel-type pressure steam sterilizer is automatically locked when materials are discharged from the back door. The method solves the problem that the prior curing-sterilizing technology is incapable of treating culture media in large capacity and easy to cause bacterial infection resulting in large-scale mould in the process of treating culture matrixes.

The invention belongs to the field of food processing, particular a preparation technology and application of special salt for raw-marinated vegetables. The preparation method of the special salt forraw-marinated vegetables comprises the following steps of firstly, crushing fresh chicken bones, cattle big bones and pig big bones to obtain bone paste for standby application; chopping fresh shiitake mushrooms, fresh mushrooms and fresh oyster mushrooms to obtain a chopped mushroom mixture, mixing the chopped mushroom mixture with distilled water, and performing pulping with a pulping machine toobtain mushroom homogenate for standby application; separately boiling chicken fat, beef tallow and lard, and then performing cooling for standby application; preparing spice composite powder; and mixing the bone paste with the mushroom homogenate to obtain a mixture, placing the mixture in a high-pressure place of 121 DEG C, performing cooling to form bone cream, regulating the pH to 6.2-6.5, adding an appropriate quantity of flavored proteases, an appropriate quantity of compound protein enzymes and an appropriate quantity of cellulases, maintaining the temperature to be 50-55 DEG C, performing vibration enzymolysis in water bath for 1.5-3h, and performing filtering to obtain bone cream enzymatic hydrolysate and the like. According to the special salt for raw-marinated vegetables made by the method, original taste and original brittleness of vegetables can be reserved, the marinated vegetables being tender and crisp in mouth feel can be made, and diversified requirements for marinated products of people can be met.

The invention discloses an arid region heavily-salted original soil afforesting method. The arid region heavily-salted original soil afforesting method includes the steps that sand doping is firstly carried out to improve the physical structure of soil in a planting area, annual growth halophyte is planted in the first year to achieve afforesting and soil partial desalting, ridging is carried out in the second year to construct furrow terrains, tamarix chinensis, amorpha fruticosa and sweet clover which are resistant to salt are planted on ridges in a trickle irrigation mode to achieve biological salt moving and soil fertilizing, and suaeda salsa is planted in furrows in a trickle irrigation mode to increase the earth surface cover degree, improve physical-chemical properties of soil and desalt the soil. By means of the arid region heavily-salted original soil afforesting method, the physical improvement and the biological improvement of the salted soil are integrated, the technical measures of furrow cultivation and water saving trickle irrigation are combined, the arid region heavily-salted original soil afforesting method is easy and convenient to operate and low in cost, and the stability and the sustainability of the heavily-salted original soil afforesting are achieved.

The invention relates to a method for preparing polyether polyol. The method comprises the following steps of: mixing a catalyst, oxyalkylene and an initiator in a static mixing reactor, introducing the mixture into a main reactor from the bottom of the main reactor, performing reaction at the reaction temperature of 140 to 150 DEG C for the reaction time of 0.5 hour, performing polymerization reaction by using mass transfer and heat transfer, introducing an obtained material into a curing kettle from an outlet in the top of the main reactor, and performing reaction at the reaction temperature of 150 DEG C and the reaction time of 0.5 hour to obtain the polyether polyol. Compared with the prior art, the method has the advantages that the conversion rate of the oxyalkylene can be stably increased to be over 99.998 percent, the obtained polyether polyol is narrow in molecular weight distribution and low in degree of unsaturation, the production efficiency is improved, and the production cost is decreased.

The invention belongs to the field of alloy treatment, and discloses a novel vanadium-nitrogen microalloy and a preparation method thereof. The novel vanadium-nitrogen microalloy consists of 100 parts by mass of a vanadium compound, 24 to 39 parts of a novel biological carbon reducing agent, carbonic acid It consists of 1-3 parts of ammonium hydrogen or ammonium chloride and 0.1-2 parts of density strength agent. The preparation method comprises: grinding the vanadium compound through a pulverizer; mixing the novel biological carbon reducing agent with the ground vanadium compound, adding a density enhancer, ammonium bicarbonate or ammonium chloride and water and mixing uniformly in a certain proportion; pressing the mixture forming. Compared with the vanadium-nitrogen micro-alloy and its preparation method in the past, the present invention improves the aging and reduction speed, solves the problem of product fried balls, cracked balls and sticky balls, improves product quality, reduces furnace damage rate, and saves furnace Kiln maintenance costs, thus greatly reducing production costs.