1163 results about "Vacuum drying" patented technology

The invention relates to a method for preparing a lithium iron phosphate / carbon composite material of a lithium ion battery, which belongs to the technical field of lithium ion batteries. The method for preparing the lithium iron phosphate / carbon composite material of the lithium ion battery comprises the following steps of: 1) preparing a suspending graphene-dispersed aqueous solution system, namely, crushing graphite to 1 to 5 microns, adding the crushed graphite into distilled water or purified water, adding 0.1 to 5 percent of surfactant, heating with stirring the mixed solution to 180 to 250 DEG C in a sealing way, performing stirring for 2 to 6 hours and reducing the temperature; 2) crushing lithium iron phosphate to the particle size of 1 to 5 microns, adding the crushed lithium iron phosphate into the distilled water or the purified water, adding with stirring 0.01 to 1 percent of coupling agent, performing uniform stirring, adding the graphene-dispersed aqueous solution, and performing stirring and filtration; and 3) vacuum-drying solid powder obtained by the filtration, and calcinating the dried solid powder for 2 to 12 hours to obtain the graphene-coated lithium iron phosphate cathode material. The method has the advantages of simple process, high material performance, high conductivity, high bulk density, high compacted density and the like.

The invention discloses an intelligent management system based on metal powder production, and relates to the technical field of industrial automation intelligent management. Sensor arrays are deployed in an ultrasonic atomizer and a vacuum drying furnace, the dust concentration, the vibration frequency, the pressure, the humidity, the temperature and the oxygen concentration are measured in real time, and the current stage is obtained through a production plan; dynamically and finely adjusting the weight matrix according to the sensor parameters corresponding to different stages, generating a weighted comprehensive index, calculating theoretical control parameters based on a physical model, correcting the theoretical control parameters through an LSTM neural network in combination with real-time environmental data, outputting an equipment control instruction, and extracting the sphericity and the moisture residue of the metal powder after the production of the metal powder is completed, so as to obtain the spherical degree of the metal powder. And the production quality is judged, and different responses are adopted according to the judgment result. The multi-parameter cooperative control precision is further improved, and the system stability is enhanced.

The invention discloses a preparation method of an In2O3-Cu-Cu2O ternary heterojunction catalyst and a preparation method of the In2O3-Cu-Cu2O ternary heterojunction catalyst. The method comprises the following steps: at room temperature and normal pressure, firstly, dissolving indium chloride tetrahydrate in a mixed solvent of ethylenediamine-ethylene glycol (the volume ratio is 1: 20-1: 30) and dihydric alcohol amine to obtain a homogeneous solution; then transferring the solution to a hydrothermal kettle, adding deionized water and Cu2O powder with different volumes, and carrying out hydrothermal crystallization at 160-200 DEG C for 10-14 hours; and centrifuging the obtained precipitate, alternately washing with water and alcohol for 2-3 times, carrying out vacuum drying at 60 DEG C for 5-7 hours, heating to 600 + / -10 DEG C at a speed of 3-5 DEG C / min in an N2 atmosphere, calcining for 3 hours, and cooling along with a furnace to obtain a target product. By adjusting the adding amount of the deionized water, the mass proportion of the three phases of In2O3, Cu and Cu2O can be continuously adjusted and controlled, and controllable preparation from'rich copper 'to'rich cuprous oxide' and'stable ternary 'is achieved.

A vacuum dryer not requiring a vacuum pump according to an embodiment of the present invention comprises: a drying chamber in which a drying rack is installed, and an exhaust valve communicating with the interior is provided on the outside of the other side; a steam generator located outside the drying chamber, having a water tank, and connected to a steam inlet; and a heat pump interlocked with the inside and outside of the drying chamber and configured by including a condenser provided in a high-temperature area, a first heat exchanger connected to the condenser outside the drying chamber, an evaporator provided in a low-temperature area, a second heat exchanger connected to the evaporator outside the drying chamber, a compressor connecting the first heat exchanger and the second heat exchanger, and an expansion valve connecting the condenser and the evaporator.

The invention discloses a wafer bonding method, which comprises the following steps of: 1, providing a first wafer and a second wafer, the surface of the first wafer being provided with a microstructure with a high aspect ratio; step 2, cleaning the first wafer and the second wafer; step 3, performing vacuum drying treatment on the first wafer and the second wafer, wherein the vacuum pressure is controlled to be 0.1-10 Torr in the vacuum drying treatment process; step 4, carrying out pre-bonding on the first wafer and the second wafer to form a bonding body; and step 5, carrying out annealing treatment on the bonding body. Aiming at the problem of residual water in the pre-cleaning process in the bonding process of the micro-structure wafer with a high aspect ratio, the wafer is placed in a controllable vacuum environment, phase change boiling of liquid water under the condition of no heat input is realized, and the problem of high-temperature heat damage caused by an existing heating and baking method is effectively avoided.

The application discloses a porous aluminum-based carrier and a preparation method thereof, a CO2 adsorbent and application thereof. The preparation of the porous aluminum-based carrier comprises the following steps: segmental aging: a solution containing pseudo-boehmite is subjected to two-stage aging, the first stage is stirring aging, and the second stage is standing aging, the two kinds of aging modes are combined to improve the crystallinity of the pseudo-boehmite; organic solvent washing and pore expansion: the pseudo-boehmite is filtered out, and is subjected to water washing first and then organic solvent washing; segmental drying: low-temperature air blowing drying and vacuum drying are combined, the drying mode, the drying temperature and the solvent evaporation rate during drying are adjusted to avoid pore shrinkage or collapse caused by excessively high drying temperature and excessively fast solvent evaporation speed. The preparation of the porous aluminum-based carrier is simple in operation and low in energy consumption, and the CO2 adsorbent prepared from the porous aluminum-based carrier and an organic amine has excellent adsorption performance such as high adsorption capacity, fast adsorption rate and high stability.

The invention discloses a sodium ion positive electrode material and a failure re-repairing method thereof.The failure re-repairing method of the sodium ion positive electrode material is used for re-repairing the sodium ion positive electrode material which fails due to exposure to a wet environment and comprises the following steps that S1, the failed sodium ion positive electrode material is washed with absolute ethyl alcohol and then subjected to vacuum drying, and the sodium ion positive electrode material is obtained; the pretreated layered oxygen positive electrode material is obtained; s2, preparing a repairing solvent, wherein the repairing solvent is prepared by dissolving hydrochloric acid modified polyaniline and multi-walled carbon nanotubes in N-methyl pyrrolidone; s3, dissolving the layered oxygen positive electrode material in a repairing solvent, and stirring to obtain a sodium ion positive electrode material to be dried; and S4, carrying out vacuum drying on the sodium ion positive electrode material to be dried, and cooling to obtain the repaired layered oxide positive electrode material. The method can effectively remove moisture and impurities on the surface of the failed material, recover the basic performance, and improve the stability of the repaired material structure, the specific capacity of current discharge and the cycle performance of the material.

The invention belongs to the field of drying machines, and particularly relates to an intelligent through-type vacuum drying machine which comprises a drying device, the upper surface of the drying device is fixedly connected with a pushing motor, the lower surface of the pushing motor is sleeved with a clamping shell, and rotating crawler belts are symmetrically arranged on the outer surface of the drying device; the number of the rotating crawler belts is four, and the outer surface of the drying device is rotationally connected with a fixed base through the rotating crawler belts. Due to the fact that the metal chain belt is provided with the inserting groove, after the upper inserting plate and the lower inserting plate are closed, the drying device can form a relatively-sealed space, moisture interference in the external environment is prevented, loss of internal heat is also prevented, after heating is finished every time, the upper inserting plate and the lower inserting plate are separated from each other, the internal heat and moisture are diffused, and the drying effect is improved. And the temperature in the drying device is quickly restored, so that the time for drying each time is fixed, and regular and quantitative production of products is facilitated.

The invention discloses a preparation method of a titanium dioxide loaded sepiolite catalyst for catalyzing desorption of a CO2-rich amine solution, which comprises the following steps: fully mixing a proper amount of tetrabutyl titanate (TBT), absolute ethyl alcohol and glacial acetic acid at room temperature to obtain a precursor solution A; then slowly dropwise adding a regulating solution composed of a proper amount of absolute ethyl alcohol and distilled water into the precursor solution A, and stirring at a certain temperature to enable the two components to fully react, so as to obtain titanium dioxide (TiO2) gel B; carrying out vacuum drying on the obtained TiO2 gel at 100 DEG C for 24 hours to obtain a TiO2 solid C; fully mixing a proper amount of sepiolite (SEP) and the solid C in distilled water, standing for a period of time, and carrying out suction filtration and vacuum drying to obtain a mixture D; and finally, heating the substance D to a calcining temperature in an air atmosphere, calcining, and grinding after calcining to obtain the titanium dioxide loaded sepiolite catalyst. Compared with the existing catalyst, the catalyst provided by the invention has the advantages of abundant raw material reserves and low price; separation is convenient, and regeneration performance is good; the catalytic performance of the catalyst is superior to that of a single sepiolite and titanium dioxide catalyst; the catalytic cycle stability is good, and the absorption performance of an amine solution is not influenced.

The invention discloses a multi-section baking method for a roll core, which comprises the following steps: S1, putting a pole piece into a baking oven, and preheating the baking oven; s2, sectional type vacuum drying, wherein three sub-stages are included, and the vacuum degree of a drying oven in each sub-stage is decreased progressively; s3, vacuum circulation drying is conducted, specifically, operation is conducted for at least 10 times or below in a circulation mode, the oven is vacuumized to 180-200 Pa, and vacuum drying is kept for 30-60 min; introducing inert gas into the oven to adjust the pressure to 90000Pa, and drying for at least 30 minutes. According to the method, multiple circulation stages of vacuum drying are split, incremental negative pressure is adopted in the first three cycles, most of water in the pole piece can be effectively brought out, finally, the pole piece is kept at a proper negative pressure level for drying, and the interface yield of the pole piece is guaranteed.

The application belongs to the technical field of drying equipment, and particularly relates to a double-cone vacuum drying machine and a silver nitrate drying method. The double-cone vacuum drying machine comprises a stock bin, a gas path mechanism, a heat source mechanism, a first power mechanism, a blowing adjustment mechanism and a second power mechanism. The second power mechanism drives the arc-shaped plate in the blowing adjustment mechanism to reciprocatingly rotate relative to the transfer bin, so as to adjust the direction and flow rate of the hot nitrogen gas blown out of the upper opening of the transfer bin. When the arc-shaped plate rotates clockwise, the wet silver nitrate material that is flipped upward under the action of centrifugal force is blown away. The second power mechanism cooperates with the blowing adjustment mechanism to reciprocatingly adjust the blowing direction and blowing flow rate of the hot nitrogen gas, which can not only ensure that the dry layer on the surface of the wet silver nitrate material is broken, but also avoid the problem that the wet silver nitrate material splashes after the dry layer on the surface of the wet silver nitrate material is broken. That is, the problem that the heat and mass transfer path inside the wet silver nitrate material is lengthened after the dry layer is formed on the surface of the wet silver nitrate material, which affects the drying efficiency and drying time, is overcome.

The invention relates to the technical field of PET (polyethylene terephthalate) bottle preparation, and discloses an anti-light-transmission PET bottle preparation method based on a two-way stretching process, raw material pretreatment: compounding a food-grade PETG (polyethylene terephthalate glycol) resin base material, a titanium dioxide or carbon black opacifying agent and auxiliaries containing a dispersing agent and the like, premixing for 5-10 minutes in a high-speed mixer at the speed of 800-1200 rpm, and carrying out vacuum drying for 4 hours at the temperature of 120 DEG C to obtain a premix with the water content of less than or equal to 30 ppm; melting and injection molding: plasticizing the premix through a twin-screw extruder, and carrying out injection molding to obtain a tubular preform with the wall thickness of 2-3mm; and cooling and heating: cooling the preformed blank in a water bath at 25 DEG C, and heating the surface layer to 90-00 DEG C and the core to 60-70 DEG C by using an infrared heating furnace. Stretching and blow molding are conducted, axial stretching is conducted at 50-80 mm / s, radial high-pressure air blow molding is conducted at 2.5-3.5 MPa, the temperature of a mold is 80-100 DEG C, and pressure maintaining is conducted for 5-8 seconds. And post-treatment: cooling in three sections, cutting off excess materials, and carrying out UV treatment to improve weather resistance. By optimizing dispersion of the opacifying agent and selecting a proper opacifying agent, light is effectively blocked, and the light transmittance is controlled at an extremely low level.

The invention belongs to the technical field of extraction and purification of plant components, and relates to a low-temperature freezing vacuum drying nano processing method for extracting anthocyanin from purple corn, in particular to a method for extracting anthocyanin from corn kernels, cores, straws, roots and stigmas of purple corn. The processing method comprises the steps of pretreatment, concentration, hydroxyl radical treatment, quick freezing, nano crushing and the like. A hydroxyl radical treatment method is adopted, so that harmful substances such as pesticide residues can be efficiently, quickly and thoroughly removed; the effect of extracting the anthocyanin from corn kernels, roots, cores, stems and stigma of purple corn by adopting a low-temperature freezing vacuum drying technology is remarkable, the purification rate is high, and the anthocyanin containing 99% of biological activity is achieved. The nanoscale anthocyanin is processed by adopting jet mill equipment and can be conveniently absorbed by a human body and widely applied to various fields.

The invention relates to the technical field of foaming, and discloses a multi-layer co-extrusion foaming buffer cotton continuous production forming process which comprises the following steps: pretreating raw materials, respectively placing polyolefin resin, biodegradable polyester and foaming agent master batch in a vacuum drying oven, drying at 60 + / -5 DEG C for 2-4 hours, controlling the water content to be less than 0.1 wt%, melting and co-extruding to obtain the multi-layer co-extrusion foaming buffer cotton. When multi-layer co-extrusion synchronous foaming is carried out, by establishing a melt pressure dynamic threshold standard and setting differential pressure control parameters for different functional layers, the stability of interface bonding of all co-extrusion layers is guaranteed, and meanwhile, melt pressure fluctuation in the supercritical fluid injection process is subjected to feedback analysis in real time; according to the method, whether the problem of abnormal fluctuation of melt pressure occurs on a co-extrusion layer interface or not can be detected in real time, the structural integrity of interlayer bonding is guaranteed, the risk of cell collapse is further reduced, and when foaming ratio mismatch is detected, temperature field distribution can be adjusted in real time according to preset gradient foaming parameters.

The invention provides a safflower pigment extraction method. The safflower pigment extraction method comprises the following steps: preparing a safflower decoction; adding whey protein into the safflower boiling liquid, and uniformly stirring; standing for layering, removing supernatant liquid, and then regulating and controlling the pH value of the mixed liquid; selective separation of carthamin yellow and haematochrome is realized through pH control; wherein yellow pigment mud is obtained under the alkaline condition, and red pigment mud is obtained under the acidic condition; the obtained yellow pigment mud and the obtained red pigment mud are subjected to vacuum drying and then ground, and the drying temperature is 30-40 DEG C. According to the safflower pigment extraction method provided by the invention, the selective separation of safflower yellow / red pigment is realized by regulating the pH value, and the limitation of single pigment extraction is broken through; and the weather resistance of the product is effectively improved through low-temperature grinding and a color fixing agent compounding and coating process. The invention further provides application of the safflower pigment.

The preparation method of the Ni-Mn bimetallic oxide modified magnesium-based hydrogen storage composite material comprises the steps that 1, under the protection of an argon atmosphere, pure magnesium powder is placed in a reaction kettle, and a product MgH2 is obtained; step 2, dissolving nickel nitrate hydrate and manganous nitrate hydrate in absolute ethyl alcohol, adding urea into the mixed solution, continuously stirring at room temperature, and then carrying out constant-temperature reaction in a tetrafluoropolyvinyl chloride high-pressure reaction kettle in a drying oven; after the reaction is finished, cooling to room temperature, and carrying out centrifugal washing; supernate obtained after centrifugal washing is poured out, precipitates are reserved and transferred into a vacuum drying box, and vacuum drying is conducted; grinding a block obtained after drying, and transferring the block into a tubular furnace for heat treatment to obtain a bimetallic oxide NiMn2O4; 3, MgH2, NiMn2O4 and stainless steel ball milling beads are weighed and put into a mechanochemical reaction ball milling kettle, intermittent ball milling is conducted for a certain time under the protection of a specific atmosphere, and then a composite sample MgH2-NiMn2O4 is collected. The practical application benefit of the magnesium-based hydrogen storage technology can be greatly improved.

The invention relates to a counter-ion adsorption high-voltage electrostatic spraying device and application thereof to preparation of a food sugar coating, and belongs to the technical field of equipment machinery and food processing. The device comprises a material conveying system, a high-voltage electrostatic spraying system, a sugar liquid supply system, a gas supply system, a sugar liquid recovery system, a microwave vacuum drying system and a control cabinet, the sugar liquid supply system and the gas supply system are both connected with the high-voltage electrostatic spraying system, the material conveying system is arranged below the high-voltage electrostatic spraying system, the material conveying system is connected with the microwave vacuum drying system, and the sugar liquid recovery system is further arranged below the material conveying system; the above systems are all controlled by a control cabinet. Through pulse switching of a high-voltage electrostatic field and a sugar liquid material, counter-ion charge accumulation of sprayed sugar liquid is realized, namely, positive charge sugar liquid (chitosan and the like) and negative charge sugar liquid (Arabic gum, carrageenan and the like) are alternately sprayed under the high-voltage electrostatic field, so that electrostatic adsorption and directional deposition of the sugar liquid on the surface of food are realized.

The invention relates to the technical field of phase-change materials, and provides a millimeter-scale flexible phase-change microsphere and a preparation method thereof, the particle size range of the phase-change microsphere is 1-5mm, and the phase-change microsphere has flexibility; the preparation method comprises the following steps: dissolving the emulsifier in water to prepare a water phase; the preparation method comprises the following steps: forming an emulsion from a phase change material, an acrylate monomer and an acrylate cross-linking agent through emulsification; adding a water-phase initiator and an oil-phase initiator into the emulsion; after the reaction is finished, filtering a product by using a filter screen, collecting filter residues, and performing vacuum drying; the obtained millimeter-scale microspheres have the characteristics of large particle size and flexibility, can be integrated in intelligent textiles and building thermal management systems, and have the advantage of large size, so that the packaging complexity is reduced, the interface thermal resistance is reduced, and the energy regulation and control efficiency is improved.

The invention provides a red mud resource reutilization method which comprises the following steps: weighing raw materials according to the proportion of the raw materials, and grinding the raw materials into powder to obtain mixed powder; the raw materials comprise 70%-95% of matrix ceramic, 0.1%-30% of auxiliary ceramic and 0.1%-30% of red mud. Putting the mixed powder into a planetary ball mill, taking out after wet milling, and drying in a vacuum drying oven; crushing the dried powder by using a crusher, and screening by using a screen; the sieved powder is loaded into a graphite mold to be pre-pressed; and sintering the graphite mold filled with the green body in a discharge plasma sintering furnace. And cooling along with the furnace to obtain the red mud doped alumina-based composite ceramic material. According to the method for recycling the red mud, efficient utilization of the red mud is achieved, the red mud is combined with aluminum oxide and auxiliary ceramic, the red mud-doped aluminum oxide-based composite ceramic material is prepared through the processes of high-energy ball milling, spark plasma sintering and the like, and the prepared material has the advantages of being high in toughness, hardness and strength and the like.

The invention discloses a preparation method of a halloysite nanotube adsorption material with sulfonic groups polymerized on the surface, and belongs to the technical field of wastewater treatment materials, the preparation method comprises the following steps: S1, adding 5.0 g of halloysite nanotubes and 5 mL of gamma-methacryloxypropyltrimethoxysilane into 100 mL of toluene; s2, in a magnetic stirrer, condensing and refluxing at 120 DEG C for 10 hours, cooling, filtering, washing with toluene and ethanol for multiple times to remove unreacted KF570, and drying a product in a vacuum drying oven at 60 DEG C for 8 hours to obtain a KH570 modified halloysite nanotube; s3, weighing 1.0 g of HNTs-KH570 as a raw material, dispersing the HNTs-KH570 in 80 mL of distilled water, adding 5.0 g of 2-acrylamide-2-methylpropanesulfonic acid, performing uniform ultrasonic dispersion, and continuously stirring at the temperature of 70 DEG C; and S4, adding 0.15 g of ammonium persulfate into 20 mL of distilled water, and fully stirring to completely dissolve the ammonium persulfate. The adsorption performance of the halloysite nanotube to methylene blue is remarkably improved through sulfonic acid group modification, and the adsorption capacity is improved by 270%.

A preparation method of a high-activity nitrogen-doped carbon-loaded CoRu nano-alloy is used for enhancing pH universal hydrogen evolution, and is characterized by comprising the following steps: dissolving dopamine hydrochloride in an aqueous solution containing H2O2 and CuSO4. 5H2O, and magnetically stirring to form a uniform mixture; and pre-wetting carbon cloth with ethanol, immersing the pre-wetted carbon cloth in the dopamine solution for 10 minutes, taking out the pre-wetted carbon cloth, washing the pre-wetted carbon cloth with deionized water for three times, and carrying out vacuum drying to obtain the polydopamine modified carbon cloth marked as PDA / CC. And immersing the obtained PDA / CC into 20 mL of aqueous solution containing Co (NO3) 2.6 H2O and RuCl3 for 6 hours to realize metal ion adsorption. And washing and drying a sample, and calcining the sample in a tubular furnace at 700 DEG C in an N atmosphere for 2 hours to obtain the self-supporting nitrogen-doped porous carbon-loaded CoRu alloy material which is recorded as CoxRu (at) CN / CC. Through a synthesis strategy based on active ion capture and in-situ carbon thermal reduction, and through construction of a nitrogen-doped carbon cobalt ruthenium alloy nanostructure and a strong metal-carrier synergistic effect, efficient hydrogen overflow and establishment of stable active sites are realized; therefore, the performance bottleneck that high activity and high stability of a traditional electrocatalyst in a wide pH range are difficult to cooperate is broken through.

A double-cone rotary vacuum drying machine overcomes the defects that in the prior art, when a double-cone rotary vacuum drying machine is used for discharging, discharging work is tedious, powder overflows, dust pollution is caused and the like, and comprises a drying machine body, a vacuumizing system and a pneumatic conveying system. A material conveying pipeline of the pneumatic conveying system penetrates through a vacuum pipeline of the vacuumizing system and extends into the drying machine body. The gas balance system comprises a gas conveying pipeline, a gas supplementing device and a gas extracting device; one end of the gas conveying pipeline penetrates through a vacuum pipeline of the vacuumizing system and extends into the drying machine body; and the other end of the gas conveying pipeline is respectively connected with the gas supplementing device and the gas extracting device through valves. According to the superfine powder pneumatic conveying device, effective pneumatic conveying of superfine powder can be achieved without opening the discharging port, dust overflowing cannot be caused, and dust pollution is avoided.

The utility model discloses a continuous production device for hydrolyzing and drying aluminum alkoxide, which belongs to the technical field of chemical equipment and comprises a primary hydrolyzing and drying unit and a secondary hydrolyzing and drying unit. The primary hydrolysis drying unit comprises a primary hydrolysis reaction kettle, a primary belt type vacuum dryer, an anhydrous alcohol condenser and an anhydrous alcohol recovery tank; the secondary hydrolysis drying unit comprises a secondary hydrolysis reaction kettle, a secondary belt type vacuum dryer, a water-containing alcohol condenser and a water-containing alcohol recovery tank; materials discharged from the discharging end of the primary belt type vacuum dryer are conveyed to the secondary hydrolysis reaction kettle, and the bottom of the water-containing alcohol recovery tank is connected with a feeding port of the primary hydrolysis reaction kettle. Anhydrous alcohol obtained from the primary hydrolysis reaction kettle is recycled and then used as a raw material for synthesizing aluminum alkoxide, and water-containing alcohol obtained from the secondary hydrolysis reaction kettle is used as a raw material for hydrolysis reaction, so that recycling of alcohol is realized; and a belt type vacuum dryer is adopted to continuously dry mixed solutions obtained by two times of hydrolysis respectively, so that continuous hydrolysis and drying production is realized.

The invention relates to the technical field of strawberry tea freeze-dried powder processing, and discloses a strawberry tea freeze-dried powder continuous processing production line and method.The strawberry tea freeze-dried powder continuous processing production line comprises a vacuum drying tank, a filter cylinder, an elastic assembly and a driving assembly; the filter cartridge is arranged in the vacuum drying tank, and the elastic assembly is mounted on the filter cartridge; a filter disc is installed in the filter cylinder, the filter disc divides the interior of the filter cylinder into a first cavity and a second cavity, a plurality of first steel balls are arranged in the first cavity, a plurality of second steel balls are arranged in the second cavity, and the diameter of the first steel balls is larger than that of the second steel balls. According to the invention, the filter cylinder in the vacuum drying tank rotates and shakes, steel balls with different diameters are used for performing double crushing and grinding on the raspberry tea, and meanwhile, the steel balls transfer heat during impact and accelerate diffusion and evaporation of moisture in the raspberry tea, so that integration of drying, crushing, screening and grinding is realized, the drying time is effectively shortened, the drying efficiency is improved, and the equipment cost is reduced.

The invention discloses an efficient fruit and vegetable vacuum drying device and a using method thereof, and relates to the technical field of food processing.The efficient fruit and vegetable vacuum drying device comprises a main body, a processor, a power source, a drying box and a water vapor adjusting module, the water vapor adjusting module is connected with the processor through wireless transmission, and the processor is installed on the lower portion of the inner wall of the main body; a power source is installed on the lower portion of the inner wall of the body, a drying box is installed in the middle of the inner wall of the body, and a water vapor adjusting module is installed on the upper portion of the inner wall of the body. By installing a water vapor adjusting module and a humidity sensor, the functions of detecting and adjusting the humidity in the device are achieved, and the problems that the drying effect is poor in the fruit and vegetable drying process, the service life of equipment is shortened, and the product quality is reduced due to the fact that the humidity in the drying box does not meet the fruit and vegetable drying humidity are solved; and the content of water vapor in the drying box can be controlled, the working efficiency of equipment is improved, the service life of the equipment is prolonged, and the yield of products is increased.

The invention provides a preparation method of a niobium-based oxide negative electrode material with a three-dimensional hierarchical porous structure. The preparation method comprises the following steps: step 1, preparing precursor suspension slurry; the preparation method comprises the following steps: preparing a niobium oxide precursor according to a molar ratio, adding 0.4-5wt% of a dispersing agent, adding a water solvent to prepare a solution with the solid phase content of 10-40% in volume fraction, and putting the solution into a ball milling tank; stirring and grinding the solution; 2, freezing, forming and drying; vacuumizing in a vacuum drying box to remove bubbles in the solution, injecting the solution into a polytetrafluoroethylene tubular mold with the volume of 50-200ml, freezing in liquid nitrogen, and drying in a freeze dryer after the slurry is completely frozen; 3, high-temperature sintering molding; and calcining the dried sample in a muffle furnace in an air atmosphere, and naturally cooling to obtain the niobium-based oxide with the hierarchical pore structure. The uniformity of the negative electrode structure and the wettability of the electrolyte to the interior of the material are improved by regulating and controlling the pore channel distribution and the specific surface area, so that the rate capability and the cycling stability of the material are improved.

The invention relates to the technical field of regenerated rubber preparation, in particular to a preparation method of high-performance regenerated rubber based on modified calcium sulfate whiskers and rice husk charcoal, which comprises the following steps: S1, mixing anhydrous calcium sulfate and absolute ethyl alcohol, pouring into a four-mouth bottle, carrying out ultrasonic treatment for 0.5 hour, heating to 80 DEG C while stirring in a water bath kettle, adding a surface modifier, and stirring for 0.5 hour; heating for 5 hours, centrifugally washing, and drying the final product in a vacuum drying oven for 2 hours to obtain the modified calcium sulfate whisker. S2, preparing modified rice husk charcoal; and S3, mixing the modified calcium sulfate whiskers, the modified rice husk charcoal and regenerated rubber by using an open mill, uniformly mixing, putting into a mold, and tabletting by using a press vulcanizer to obtain the high-performance regenerated rubber based on the modified calcium sulfate whiskers and the rice husk charcoal. The industrial by-product calcium sulfate and the agricultural waste rice husk are used as raw materials and have the characteristics of no pollution and regeneration cycle, the high-performance filler is prepared through a green process, and the production cost is reduced while the rubber performance is improved.

To suppress generation of uneven drying of a coating film by making a gap during decompression drying uniform within a substrate surface.SOLUTION: In a decompression dryer, a plurality of pressing pins are suspended via through holes of a top plate part from a ceiling surface of a cover part toward a substrate. Lowering of the cover part causes a lower surface of the cover part to come into close contact with an upper surface of a base part so as to form a processing space, and the pressing pins abut on a peripheral edge region of one main surface of the substrate to correct warp of the substrate. While the warp is corrected by the pressing pins, an opposing surface of the top plate part opposes to the upper surface of the substrate supported by a substrate support part. Thus a distance between the upper surface of the corrected substrate and the opposing surface (gap during decompression drying) can be made uniform within the substrate surface.SELECTED DRAWING: Figure 1

The invention provides an efficient surface treatment method for plastic gaskets, which comprises the following steps: S1, pretreatment: putting a plurality of groups of plastic gaskets into a tool basket, and sequentially carrying out ultrasonic degreasing by an ultrasonic cleaning machine, deionized water spraying washing by a spraying cleaning machine and vacuum drying by a vacuum drying oven; s2, plasma activation is conducted, specifically, the gasket is placed on a rotary carrying table of rotary plasma treatment equipment along with the tool basket, a plasma treatment cavity is vacuumized to 5-15 Pa, then treatment gas is introduced, a plasma generator is started, and the rotary carrying table drives the gasket to rotate at a constant speed during treatment; s3, functional coating coating is conducted, specifically, the activated gaskets are taken out and arranged to an ultrasonic atomization and electrostatic spraying all-in-one machine, and modified coating is coated; and S4, composite curing: pre-curing the coated gasket through an infrared pre-curing oven, and then transferring the gasket into an ultraviolet pre-curing oven for ultraviolet curing to obtain a finished product. According to the method, the treatment efficiency and uniformity are improved, and the coating adhesive force and the gasket performance are enhanced.

The utility model discloses a tunnel vacuum drying system which comprises a vacuum system and a drying system. The drying system comprises a drying assembly used for drying the workpieces based on radiation heating and a conveying assembly used for conveying the workpieces into the drying assembly to be dried and then conveying the workpieces out. Wherein the drying system performs multidirectional drying treatment on workpieces in a heating and vacuumizing mode, so that the drying time is shortened; in addition, the workpieces can move in the drying cavity in the drying process, heating is more uniform, the risk that the local temperature of the workpieces is too high is reduced, the drying efficiency is improved, energy consumption and production cost are reduced, and meanwhile the yield of the workpieces is improved; in addition, the multiple drying cavities are vertically stacked, the height of the conveying assembly is adjusted by arranging the lifting mechanism, the overall equipment length of the tunnel vacuum drying system can be reduced, and the occupied area of the equipment is saved.