135results about How to "Moisture control" patented technology

The invention belongs to the technical field of tobacco manufacturing and particularly relates to a microwave tobacco stem expansion technology. The method comprises the following steps of preparation of raw materials, quantitative feeding, temperature raising of tobacco stems, microwave expansion, microwave dehumidification, cooling shaping and production of cut stems. The method has the advantages that the production cost is low, the structure is stable, the cut stems do not retract when absorbing water and can be directly produced without ageing treatment, the seamless joining between specialized, large-scaled and continuous processing of microwave expansion tobacco stems and production of cut tobacco is realized, the cycle of producing, storing and preparing cut tobacco is unnecessary, the logistics and warehousing cost during the ageing period of expanded tobacco stems is unnecessary, and the economic benefits are quite obvious.

The invention discloses an inorganic / organic composite functional porous isolating membrane. The isolating membrane comprises porous base material and at least one inorganic functional coating adhering to the surface of the porous base material, and aqueous slurry prepared for the inorganic functional coatings is prepared from inorganic ceramic particles, water-soluble polymer thickener and aqueous polymer adhesive; the inorganic ceramic particles comprise the same substance in two types of particle sizes, wherein the average particle size (D50) of the smaller inorganic ceramic particles is 0.2-0.5 micrometer, and the average particle size (D50) of the larger inorganic ceramic particles is 0.6-1.0 micrometer; the aqueous polymer adhesive is a hydrophobic high-molecular polymer with the water drop contact angle of the dry adhesive of the aqueous polymer adhesive 110-140 degrees; the solid content of the aqueous slurry is 40-60%. According to the inorganic / organic composite functional porous isolating membrane, the high-temperature thermal stability of the isolating membrane can be effectively improved by means of the inorganic functional coatings, and the water content of the inorganic coatings is effectively reduced, so that the safe performance of a battery and the stability of long-term circulation are improved.

The invention relates to the technical field of a lithium ion battery, in particular to a lithium ion battery electrolyte and a preparation method thereof. The lithium ion battery electrolyte comprises a non-aqueous solvent, a lithium salt and an additive, wherein the additive comprises a first type of additive capable of water removal and acid reduction and a second type of additive capable of stabilizing color change of the electrolyte, the first type of additive is a silazane compound or a carbodiimide compound, and the second type of additive is a benzothiodiazole compound or a phosphite ester compound. Compared with the prior art, the lithium ion battery electrolyte has the advantages that by controlling an environmental temperature for configuring the electrolyte and with the first type of additive capable of water removal and acid reduction and the second type of additive capable of stabilizing the color change of the electrolyte, long-term control on moisture, acidity and chromaticity of the electrolyte can be simultaneously achieved, the storage time of the electrolyte is substantially prolonged, and the electrolyte quality is ensured. The lithium ion battery electrode is particularly and suitably used for an additive system which easily causes the chromaticity and the acidity of the electrolyte to change.

The invention discloses a lithium hexafluorophosphate preparation method, which comprises the following steps: anhydrous acetonitrile is put into a sealed pressure heating furnace, simultaneously solid high-pure nano lithium fluoride is added into the furnace, and after dried inert gas is adopted to drive air out from the furnace a suspension is formed under sealed stirring condition; compressed phosphorus pentafluoride gas is introduced in and the lithium hexafluorophosphate is synthesized continually under the sealed stirring condition. The product prepared by the method has high purification, the content of LiPF<6> is greater than 99.9 percent, the water content is less than 10ppm, the content of HF is less than 50ppm and the content of total impurity metal is less than 50ppm; moreover, the technique is simple, the preparation process is environment-friendly, thus having extremely high industrial popularization value.

The invention provides a household garbage treatment method and treatment system. According to the treatment method, household garbage is broken, recoverable garbage is sorted out, and an anti-corrosion modifier is added to be stored; the stored garbage is subject to breaking, and hot air drying and grinding of a cement kiln, powder selection is carried out, and granule matter is burnt. In the process, the garbage is subject to drying and grinding and then is burnt, the side effect of garbage water or garbage waste gas on safety operation of a cement kiln system can be reduced as far as possible, the secondary pollution is reduced, harmless, low-cost and low-investment treatment of household garbage is ensured, and the method and system meet the sustainable development circular economy direction. According to the treatment system, the special advantage of the cement kiln is sufficiently used, in combination with the garbage system, the capital investment is reduced, the garbage treatment capacity is improved, garbage applicability is improved, and the system is a harmless, recycling and low-cost treatment system.

The invention discloses a phthalocyanine compound synthesizer. The phthalocyanine compound synthesizer comprises a first reaction kettle, a first condenser, a second reaction kettle and a second condenser, wherein the first reaction kettle is communicated with the second reaction kettle by a first material conveying tube; a first gas inlet, a first gas outlet, a first solvent reflux opening and a first water outlet are formed on the first condenser; the first reaction kettle is communicated with the first gas inlet by a first mixed gas conveying tube; the first solvent reflux opening is communicated with the first reaction kettle by the first solvent reflux tube; a second gas inlet, a second gas outlet, a second solvent reflux opening and a second water outlet are formed on the second condenser; the second reaction kettle is communicated with the second gas inlet by the second mixed gas conveying tube; the second solvent reflux opening is communicated with the second reaction kettle by the second solvent reflux tube; and the second gas outlet is communicated with the first reaction kettle by a third mixed gas conveying tube. The phthalocyanine compound synthesizer disclosed by the invention effectively controls generated moisture, improves ammonia gas yield, recycles a carrier solvent and ensures safety and continuity of operation.

The invention provides a method for preparing vinylene carbonate through micro channel reaction. The method comprises the following steps: (1) preparing equipment, including an enhanced mass transfer micro channel reactor, a metering pump I, a metering pump II and a micro filter, wherein the enhanced mass transfer micro channel reactor comprises a preheater I, a preheater II, an ultrasonic device and a micro channel module; (2) uniformly mixing chloroethylene carbonate with an ester solvent so as to obtain a mixed liquid, synchronously inputting the preheated mixed liquid and triethylamine into a micro channel, heating, mixing, performing reaction, discharging a product obtained after the reaction is completed from a discharge valve, filtering so as to obtain a crude product, and rectifying the crude product into a rectifying still, so as to obtain the vinylene carbonate, wherein the mole ratio of the chloroethylene carbonate to the triethylamine is 1:(1.5-2.0). The method is simple, convenient and safe to operate, relatively small in quantity of byproducts, small in single solvent consumption, low in moisture content, relatively high in product purity and yield, small in environment pollution and applicable to industrial large-scale production, and continuous production can be achieved.

The invention discloses a production process method for machine-made sand aggregate and belongs to the field of sand aggregate production. The production process method solves the technical problem ofhow to remove clay impurities and improve the quality of the sand aggregate. According to the technical scheme, the method comprises the following steps: S1, conveying a raw material to a V-shaped powder concentrator to concentrate powder to obtain pre-treated raw material; S2, dedusting the pre-treated raw material by a bag type dust collector I while concentrating powder; S3, conveying the pre-treated raw material to a crusher to be crushed through a lifter to obtain a crushed material; S4, conveying the crushed material to an analogue-digital control screen to be screened to obtain a screened material; S5, dedusting the screened material through a bag type dust collector II while screening the material by the analogue-digital control screen; S6, conveying the screened material to a particle shape optimizing machine to granulate to obtain an optimized grain sand aggregate; and S7, conveying the optimized grain sand aggregate which is humidified by a humidifying stirrer to a belt conveyor.

The invention relates to an active lamp defogger and humidity removal method thereof, and the fog in a lamp can be removed and restrained through controlling dew point in the lamp by dry air or reducing absolute humidity of the air in the lamp. The active lamp defogger comprises: an active defogging controller which is connected with an electronic control unit for controlling an HVAC device of a vehicle, a humidity detection sensor which is connected with the active defogging controller and is arranegd in the lamp of the vehicle to detect the humidity in the lamp, a dry air supply line which forms a moving path of the dry air of the HVAC device from the HVAC device to the lamp, and a check valve which is arranged on the dry air supply line and is closer to the HVAC device than the lamp. Then the active lamp defogger can rapidly reduce the absolute humidity in the lamp under the dew point temperature to defog or restrain the fog occuring.

The invention relates to a high-yield planting method of panax notoginseng. The method comprises the following steps: A, a shading and rainproof shed is built; B, cultivation containers are prepared; C, seeds are selected; D, sowing is carried out; E, seedling stage management is carried out; F, transplanting is carried out; G, transplanting management is carried out, wherein the transplanting management step comprises weeding, watering, fertilizing, and pest and disease control; and H, harvesting is carried out. The method has the following advantages: with the shading and rainproof shed, humidity, ventilation and illumination degree in the shed can be effectively controlled, such that panax notoginseng resistance to the nature can be improved, and panax notoginseng is not prone to pests and diseases; the panax notoginseng is planted with cultivation containers, such that panax notoginseng disease cross-infection is avoided, the use of pesticide is reduced, and panax notoginseng medicinal value is improved; with the use of the cultivation containers, substrate replacement is convenient, and a problem of panax notoginseng continuous cropping difficulty is avoided; panax notoginseng is planted with the cultivation containers, such that the temperature is higher by 1-2 DEG C than that of ground planting, and panax notoginseng growth period is shortened; the planting substrate is loose and breathable, and can retain water, such that panax notoginseng seed root system well development is ensured; during a transplanting process, with a special water and fertilizer spraying method, panax notoginseng healthy growth is promoted, and panax notoginseng rhizomes are thick and solid.

The invention relates to a cefetamet pivoxil hydrochloride capsule which contains the raw materials by the weight percent: 59% of effective and active ingredient, 10-15% of disintegrant, 1-3% of solubilizer, 20-28% of bulking agent and 2-3% of lubricating agent; wherein the effective and active ingredient is cefetamet pivoxil hydrochloride; the disintegrant comprises sodium carboxymethyl starch and cross-linked sodium carboxyl cellulose; the solubilizer is lauryl sodium sulfate; the bulking agent is one or two of lactose and mannitol; and the lubricating agent includes superfine silica powder and magnesium stearate. The invention also discloses a preparation method of the cefetamet pivoxil hydrochloride capsule, which adopts dry pressing pelletization technique; therefore, the invention has the advantages of simple equipment and less investment; the prepared capsule is stable in quality, excellent in solubility property, rapid in absorption, convenient in taking and good in mouthfeel.

A method for breed strawberry seedlings save labor includes such steps as propagating, refrigerate, classifying, transplanting and activating seedlings. The invention improves the breeding coefficientof seedlings, promotes flower bud differentiation, and simultaneously improves the consistency of seedling quality and seedling age. This method is easy to operate, easy to master, repeatable, time-saving, labor-saving, easy to classify and centralized management, perfecting the shortcomings of conventional strawberry seedling.

The invention discloses a multi-layer and multi-flavor nut seaweed crisp and a processing method thereof, and belongs to the technical field of food processing. The multi-layer and multi-flavor nut seaweed crisp and the processing method thereof comprises the following steps: the roasted pale spot seaweed, seasoning, sesame, and almond kernel are prepared; before applying the seasoning on the seaweed, the seasoning is roasted for 8-12 minutes under the temperature of 70-80 DEG C to make the seasoning in a sticky state, and thus moisture in the seasoning is prevented from affecting humidity ofthe seaweed; a rolling machine is used to roll to uniformly apply the seasoning on the seaweed, and the smoothness of the seaweed can be guaranteed; and the sesame and the almond kernel are sent on the seaweed by a batch feeder, and one layer is laid again on the top of the sesame and the almond kernel, and the thickness of each layer of seaweed crisp can be facilitated to 1cm through rolling of the rolling machine; and the finished product is roasted for 8-12 minutes at the temperature of 75-90 DEG C to reduce the loss of unsaturated fatty acid of the nuts, finally taste of the seaweed is crisp and delicious, the nut is fresh and free of oil rancidity, and taste of the multi flavors are even.

The invention relates to a soilless blueberry cultivation method, which includes: firstly, selecting types of substrate for soilless blueberry cultivation; secondly, selecting soilless cultivation equipment; thirdly, selecting cultivars and tree ages of blueberry under soilless cultivation; fourthly, performing field planting; and fifthly, preparing nutrient solution. By the soilless blueberry cultivation method which is advanced, the problems limitation of blueberry cultivation from soil conditions are solved, blueberry can be planted more widely, planting cost is reduced, and commodity rateof blueberry fruits is increased. Based on the soilless blueberry cultivation method, home decoration and ornamentals planting modes of blueberry can be developed further, the industrial chain of blueberry is extended, and added value of blueberry is increased.

The invention discloses a manufacturing method for a seasoned instant mushroom. The manufacturing method comprises the following steps: soaking mushrooms in water with a temperature of 50 DEG C for 30 min and then draining the mushrooms; heating edible oil to more than 100 DEG C, frying the drained mushrooms in a pan with the oil until the mushrooms is yellow, bright, delicious and crisp, taking out the fried mushrooms and draining the fried mushroom; adding accessory materials into the fried mushrooms and carrying out uniform mixing with stirring so as to realize seasoning, wherein the accessory materials comprise finished chicken liquid, salt, soy, yellow rice wine, citric acid and capsicum; and subjecting the seasoned mushrooms to packaging and disinfection so as to obtain the finished seasoned instant mushroom product. A formula for the seasoned instant mushroom is unique; the manufacturing method is reasonable; the manufactured seasoned instant mushroom can be eaten immediately after a packaging bag is split, is convenient to eat and has a health care effects and reasonable price; through frying, original nutritional components of the mushrooms are maintained and moisture in the mushrooms is reduced, so the seasoned instant mushroom has a long shelf-life; natural healthy accessory materials are employed, no chemical antiseptic is added, and the seasoned instant mushroom is applicable to people of all ages.

The invention discloses an intelligent humidity-controlling irrigating system. The system comprises a structural support, wherein a spraying device is arranged on the position of the structural support, a water inlet end of a main water inlet pipe of the spraying device is respectively connected with a water supply pipeline and a nutrient fluid system through an automatic control valve, a flow control signal receiver is arranged inside the automatic control valve, and the flow control signal receiver is connected with an intelligent humidity controller. By the aid of the intelligent humidity controller, an intelligent chip is used for monitoring environmental humidity, water in a vertical greening system is monitored effectively, plants can acquire proper humidity and can grow well, according to the system, automatic irrigation is performed, and scientific planting is achieved through daily maintenance.

The invention provides a method for preparing ceftizoxime powder injection for injection and use thereof. The method for preparing ceftizoxime powder injection for injection provided by the present invention includes steps of filling ceftizoxime raw material powder into bottle, filling nitrogen, fastening plug and rolling cover, and the method is carried out under condition that humidity is less than 40%, and the nitrogen filling operation is carried out under multistage nitrogen-filling protection. Because environmental relative humidity is successfully controlled in the preparation process, preparation humidity is less than 40%, product stability is insured, and by employing multistage nitrogen-filling protection, problem of easy oxidation and decomposition of the product is solved, and expiry date is prolonged. The ceftizoxime powder injection prepared by the method has moisture content less than 8.0%. The method for preparing ceftizoxime powder injection can stability control preparation humidity, reduce oxygen content in finished product, and increase stability of the finished product, and safety of packaged clinic medicament.

The invention discloses a drying method by using a metal object as a heat transfer medium and a system device thereof. The method and the device adopt the granular metal object as the heat transfer medium, make the metal object accept heat of a heat source through a heat exchanger, allow the metal object with certain temperature and mud to be directly contacted and mixed in a drier, and transfer heat of the metal object to the mud by a transmission method, thereby achieving the aim of intensifying heat transfer, heating the mud and evaporating moisture in the mud. The device has the advantages of simple and reliable system, strong controllability, good adaptability to multiple kinds of mud, requirement fulfillment to different specifications, small occupied area, low investment, high heat efficiency and the like, solves the technical problems of difficult tail gas treatment, high energy consumption and the like in the direct convection type drying technology by using flue gas or hot air as the heat transfer medium, and avoids the defects of complicated equipment, high cost, small capacity of single equipment, easy wall adhesion and the like in the indirect conduction type drying technology by using vapor or conduction oil as the heat transfer medium. The method and the device can be used for drying mud and other wet materials, household garbage and other waste materials.

The invention discloses an annular-steel-strip process and device for continuous dried beancurd stick processing. The device comprises a milk distribution system, a steel strip heating unit, a cutting-knife strip slitting and bundling system, a dampening unit, a baking unit, a remnant milk collecting device, a fixed-length cutting unit and the like. According to the process and the device, dried beancurd sticks are heated through steel strips by using vegetable oil, so that the uniform-heated curing of the dried beancurd sticks can be achieved; gradient temperature control is achieved according to stations where the dried beancurd sticks are located, so that the quality of curing of the dried beancurd sticks is effectively improved. The process and device for automated and continuous dried beancurd stick production, disclosed by the invention, are different from the traditional dried beancurd stick processing modes, have the characteristics of high efficiency, stable and controllable quality, and the like and are applicable to the processing of a mass production line for the dried beancurd sticks.

The invention discloses a production process of pradaxa mesylate. The production process comprises the following steps: (1) preparing an intermediate PR-I; (2) preparing an intermediate PR-II; (3) preparing pradaxa PR-III; (4) refining the pradaxa PR-III; and (5) preparing pradaxa mesylate. The production process is mild in reaction condition, simple in reaction route, convenient in operation, high in selectivity, and capable of shortening the production period; and the obtained pradaxa intermediate is low in water content, the prepared pradaxa mesylate is high in yield and purity, and the maximum impurity is low in impurity content; and the production process is less in emission of three wastes, environmentally friendly, free from requiring the columnar chromatography purification, suitable for the industrialized production, capable of avoiding the requirement of palladium-on-carbon high-pressure hydrogenation on equipment and capable of reducing the risk.

The invention provides a polypeptide chelated potassium zinc urea fertilizer and a preparation method thereof, and belongs to the technical field of fertilizer. The fertilizer uses poly-aspartic acid as a chelating agent, and adds 5 kg of polypeptide chelated potassium zinc stock solution into each ton of urea based on the traditional urea. The fertilizer is a novel high efficiency nitrogenous fertilizer, can supply nitrogen, potassium, zinc elements required by plant, can improve the rate of absorbtion and utilization of the plant for the nutrient elements in soil, can supply biological growth elements evenly, and has strong synergistic effect for the nitrogenous fertilizer, potash fertilizer, and phosphate fertilizer. The chelating agent can be biodegraded, and has no pollution for the plant and the soil. The polypeptide chelated potassium zinc stock solution and urea solution can pass two-stage conveying devices of urea solution pump and fusion pump in the preparation method, so that the mixture can be mixed uniformly, and the stability of the product quality can be guaranteed. The polypeptide chelated potassium zinc stock solution is added into the inlet of the urea solution pump, and the moisture of the product can be controlled effectively after performing primary evaporation, granulation and cooling.

The invention discloses a device for producing powdery monoammonium phosphate by using extraction spent acid. The device comprises a wet purified phosphoric acid and extraction spent acid tank, a dilute phosphoric acid storage tank, an ammonification reactor, a slurry concentrator and a product spray drier, wherein an acid preparing tank is arranged before the ammonification reactor; the wet purified phosphoric acid and extraction spent acid tank is connected with the acid preparing tank through a pipeline, and a conveying pump and a gauge are arranged on the pipeline; the dilute phosphoric acid storage tank is connected with the acid preparing tank through a pipeline, and a conveying pump and a gauge are arranged on the pipeline; and the acid preparing tank, the ammonification reactor, the slurry concentrator and the product spray drier are sequentially connected with one another through pipelines. By the device, the moisture of a product in the production process can be effectively controlled, and the total nitrogen content of the product can be improved; and the device is stably and reliably operated.

The invention provides a preparation method of a polyimide powder consumable material for laser sintering forming 3D printing. The preparation method comprises the following steps: (1) putting polyimide in a high-speed mixer, heating up from 110 DEG C in a gradient manner for drying, wherein the heating frequency is 2 DEG C / min-8 DEG C / min, and the temperature is finally stabilized at 150 DEG C for drying for 0.5h; (2) adding the polyimide dried in the step (1) into a grinder and grinding for 1h-2h under the condition of 320r / min to obtain a polyimide crude product; and (3) heating up the polyimide crude product in the step (2) from 100 DEG C in a gradient manner for drying, wherein the heating frequency is 2 DEG C / min-8 DEG C / min, and the temperature is finally stabilized at 150 DEG C for drying for 0.5h to obtain the polyimide powder consumable material for laser sintering molding 3D printing. By adopting the drying-grinding-drying process, the obtained polyimide powder consumable material has good compatibility with impregnating resin, uniform particle size and no need of addition of adhesives.

The invention discloses a method for preparing meso-macroporous activated carbon from long flame coal. The selected coal type is single long flame coal, and a multi-component composite adhesive is adopted. According to the total weight, the added amount of raw coal is 60%-80%, the added amount of the adhesive is 10%-25%, and the added amount of water is 3%-10%. The meso-macroporous activated carbon of the long flame coal is prepared by powder bonding, strip compression and granulation, carbonization and secondary carbonization, and activation of the raw materials and the like. A coal blendingtechnology cannot be needed, activated carbon with developed medium and large pores is prepared by the single long flame coal, the problem of carbonization and shaping of single long flame coal is solved, the multi-component composite adhesive is adopted, and the production environment is greatly improved.

The invention provides a preparation method of expanded popcorn. The method comprises the following steps: selecting materials; removing impurities; grading corn kernels through screening, wherein the corn kernels are divided into 2-3 grades according to sizes of the corn kernels; boiling: putting impurity-removed corn kernels with uniform sizes in the same grade in a pot, adding water of which the weight is 1.5-2.5 times of the weight of the raw materials, and heating and boiling the water for 120-150 minutes; draining the boiled corn kernels, and drying the corn kernels until the water content of the corn kernels is reduced to 10.5-14%; expanding the obtained dry corn kernels; screening the corn kernels; putting the screened corn kernels in oil with the temperature of 180-190 DEG C for frying for 55-65 seconds; flavoring the fried corn kernels; and carrying out microwave drying on the flavored corn kernels until the water content of the corn kernels is reduced to be within 3%, thereby obtaining the expanded popcorn. The method provided by the invention lowers the temperature, shortens the time, reduces the nutrient loss, reduces the energy consumption and reduces the production cost, the product has good mouthfeel, and the shelf life is prolonged.

The invention particularly relates to a drying dehydration plant of an electric heating vibrating screen. The drying dehydration plant solves the problem that the existing coal dehydration effect is poor so that transportation cost is high. The drying dehydration plant further comprises a power source, a control cabinet and an infrared ray probe located in a screen body, wherein a heat conductive plate is arranged on the upper end face of the screen body, a heat insulation plate is arranged on the lower end face of the screen body, a supporting column fixed with the heat conductive plate and the heat insulation plate is arranged between the heat conductive plate and the heat insulation plate, a plurality of crookedly-distributed electric heating tubes are arranged in the screen body, a threaded rod penetrating out of the lateral wall of the screen body is fixed on each electric heating tube, a fastening nut is screwed on each threaded rod, the output end of the power source is connected with the input end of the control cabinet, and the output end of the control cabinet is respectively connected with the input end of a motor, the input end of the infrared ray probe and a binding post of each electric heating tube. The drying dehydration plant achieves the purpose of intelligent constant temperature conversion, effectively controls moisture required by materials through drying dehydration, further guarantees original essences of materials in a granulometric level, namely cannot cause dissociation phenomena, is safe in operation process, and brings convenience to the operation process.

The invention belongs to the technical field of soilless culture, and particularly relates to a soilless culture solution and a preparation method thereof. The soilless culture solution is prepared from, by weight, 20,000-60,000 parts of straw organic liquid, 0.1-0.5 part of a plant growth regulator, 2-5 parts of EM probiotic liquid, 5-10 parts of antiseptic bactericidal substances, 20-50 parts of urea, 10-40 parts of potassium nitrate, 10-40 parts of monopotassium phosphate, 1-5 parts of magnesium sulfate heptahydrate, 0.1-0.5 part of chalcanthite, 0.1-0.5 part of manganese chloride tetrahydrate, 1-3 parts of ethlene diamine tetraacetic acid ferric sodium salt, 0.5-1.5 parts of boric acid, 0.5-1 part of ammonium molybdate tetrahydrate and 0-10 parts of a pH regulator. According to the soilless culture solution, the straw organic liquid is adopted as a liquid phase carrier, and the soilless culture solution is low in production cost, high in nutrient element content and wide in application range; the preparation method is simple and reasonable and promotes industrial production.

The invention discloses an annular steel belt continuous beancurd skin processing device and method. The device comprises a slurry distributing and steel belt heating unit, a skin combining device, a moisture regaining unit, a drying unit, a residual slurry collecting device, a cutting unit and the like. On the basis, the invention discloses the continuous beancurd skin processing method. Vegetable oil is utilized for heating beancurd skin through steel belts, the beancurd skin can be evenly heated and solidified, temperature gradient control is achieved according to the station where the beancurd skin is located, and the solidification quality of the beancurd skin is effectively improved. The automatic and continuous beancurd skin production process and device are different from a traditional beancurd skin processing mode, have the advantages of being high in efficiency, stable and controllable in quality and the like, and are suitable for beancurd skin batch production line processing.

The invention provides a macro-element water-soluble fertilizer and a preparation method thereof, and belongs to the field of fertilizers. The macro-element water-soluble fertilizer is prepared from the following raw materials in parts by weight: 300-350 parts of ammonium dihydrogen phosphate, 400-450 parts of potassium nitrate, 200-250 parts of urea, 45-55 parts of anhydrous magnesium sulfate and 1-2 parts of anticaking agents. Compared with the prior art, the method provided by the invention can be used for effectively controlling the moisture, heavy metal content and water-insoluble substance content of a product and preventing caking from appearing in a preparation process.