1952 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.

A vacuum drying apparatus has a rigid bin structure within a flexible membrane liner arranged to store particulate material therein. An exhaust passage and air inlet passage communicate through the envelope in sealed relationship with the envelope. The air inlet passage is adjustably flow restricted relative to the exhaust passage so as to enable a flow through material in the liner when applying vacuum pressure to the exhaust passage, for example using a centrifugal fan. The air inlet passage communicating with an upper manifold within the upper portion of the bin structure and the exhaust passage communicating with a lower manifold within a lower portion of the bin structure.

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.

The invention relates to a method for efficiently separating three components of lignocellulose biomass by using an alcohol-based ternary eutectic solvent, which comprises the following steps: uniformly mixing choline chloride, 4-chlorobenzenesulfonic acid and an organic alcohol solvent, heating in an oil bath, and stirring to obtain the alcohol-based eutectic solvent; the preparation method comprises the following steps: mixing an alcohol-based eutectic solvent with agriculture and forestry solid waste powder, putting the mixture into a reaction kettle, introducing carbon dioxide gas until the carbon dioxide gas forms subcritical carbon dioxide, and carrying out stepped progressive increase reaction under the reaction pressure of 2-4MPa to obtain an intermediate product; mixing the intermediate product with a reaction stopping agent, and performing suction filtration, cleaning, vacuum drying and grinding to obtain dry cellulose solid residual powder; adding deionized water of which the volume is 10 times that of the filtrate into the filtrate, standing, precipitating and centrifuging to obtain a lignin-enriched component; and adding a 5-30% ethanol solution, continuously stirring, centrifuging and drying to obtain the purified lignin. The lignin removal rate and the cellulose retention rate of the lignocellulose in the agricultural and forestry solid wastes are effectively improved.

A method for preparing a ceramic shell for precision casting. The method comprises: S1, smearing the exterior of a wax pattern with corresponding layers of ceramic shell slurry layer by layer, wherein a ceramic shell to be dried is obtained at a corresponding layer each time after the smearing of the ceramic shell slurry is completed; S2, putting said ceramic shell at each corresponding layer into a vacuum rapid drying system for a vacuum rapid drying treatment, and after the drying of the ceramic shell at the layer is completed, smearing same with a subsequent layer of ceramic shell slurry, wherein during the vacuum rapid drying treatment, image data of the ceramic shell to be dried is first acquired and subjected to model structure analysis so as to obtain the position, orientation and depth of a deep hole in the ceramic shell to be dried, same are sent to a fan set control module, the fan set control module performs fan set control analysis according to the position, orientation and depth of the deep hole in the ceramic shell to be dried and controls the starting and stopping and / or control parameters of each fan set according to an analysis result, and the drying time of all portions of the integral ceramic shell to be dried tends to be identical by means of vacuumizing a vacuum drying chamber and / or restoring the chamber pressure and controlling the starting and stopping and / or control parameters of all the fan sets; and S3, waiting for the completion of the drying of the ceramic shells at all the layers to obtain a ceramic shell for precision casting. On the basis of retaining the inherent advantages of a thick-slurry ceramic shell, the preparation method effectively overcomes problems present in the thick-slurry ceramic shell.

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 provides a full-automatic hydrocarbon cleaning vacuum drying device and a using method thereof.The using method of the full-automatic hydrocarbon cleaning vacuum drying device comprises the following steps that S1, a workpiece to be cleaned is placed in a cleaning cavity; s2, the cleaning cavity is vacuumized for the first time; s3, spraying and rough washing; s4, after reaching the liquid level, carrying out ultrasonic rough washing; s5, after ultrasonic rough cleaning is completed, liquid discharging is conducted, and after liquid discharging is completed, the cleaning cavity is vacuumized for the second time; s6, spraying and fine washing; s7, after the liquid level is reached, ultrasonic fine washing is conducted; s8, after ultrasonic fine washing is completed, liquid discharging is conducted; according to the full-automatic hydrocarbon cleaning vacuum drying device, efficient and automatic cleaning operation on various workpieces to be cleaned under different temperature and different cleanliness requirements can be achieved through the full-automatic hydrocarbon cleaning vacuum drying device, and the cleaning effect and efficiency are greatly improved.

The invention belongs to the related technical field of animal remains treatment, and discloses an animal remains treatment device which comprises a box body, a spraying unit is arranged at the top of the box body, a soaking and freezing unit is arranged below the spraying unit, animal remains are placed in the soaking and freezing unit, and the animal remains are conveyed to a vacuum drying unit after being sprayed, soaked and frozen. And performing crushing treatment after drying. Two-phase heat exchange of liquid nitrogen spraying is utilized, quick freezing of the remains is achieved, then liquid nitrogen is utilized for soaking, and ductile-brittle transformation of animal remains tissue is achieved; sublimation of water in the remains is achieved through negative pressure, drying of the animal remains is achieved, mechanical damage is reduced to the maximum extent, pathogens and bacteria can be effectively killed through liquid nitrogen freezing and smashing, and therefore the risk of infectious diseases is reduced.

The invention discloses a preparation method of FeCoNiMnAl series high-entropy alloy powder with wave absorbing performance, which comprises the following steps: (1) uniformly mixing iron powder, cobalt powder, nickel powder, manganese powder and aluminum powder to obtain alloy raw material powder; (2) adding the alloy raw material powder, absolute ethyl alcohol and grinding balls into a ball milling tank, and carrying out high and low rotating speed alternate ball milling under the protection of inert gas; (3) after ball milling is finished, the alloy raw material powder obtained after ball milling is subjected to vacuum drying, grinding and smashing, and an intermediate product A is obtained; (4) adding a sodium hydroxide solution into the intermediate product A, and performing corrosion modification by adopting a water bath heating method; after the water bath is finished, washing a solid product obtained by solid-liquid separation to be neutral to obtain an intermediate product B; and (5) carrying out vacuum drying on the intermediate product B, and grinding and crushing. The FeCoNiMnAl series high-entropy alloy powder prepared by the preparation method disclosed by the invention has relatively excellent wave absorbing performance under the condition that the thickness is relatively small.

The invention discloses a preparation method and sodium storage application of a sodium-enriched sodium ferric sulfate composite material. The preparation method comprises the following steps: carrying out low-speed ball milling on iron-based sulfate and dispersed CNTs (Carbon Nanotubes), carrying out vacuum drying, carrying out heat treatment, and naturally cooling to room temperature to obtain FeSO4 / CNTs; the preparation method comprises the following steps: mixing FeSO4 / CNTs and anhydrous Na2SO4 according to a molar ratio of Na to Fe of 7: 5.5, carrying out low-speed wet ball milling, carrying out vacuum drying, and grinding to obtain Na2SO4 / FeSO4 / CNTs; and compacting Na2SO4 / FeSO4 / CNTs, placing the Na2SO4 / FeSO4 / CNTs in a tubular furnace, preserving heat at 350-400 DEG C for 10-24 hours, cooling to room temperature, and grinding to obtain the Na7Fe5.5 (SO4) 9 / CNTs composite material. The Na7Fe5.5 (SO4) 9 positive electrode material disclosed by the invention has good sodium storage specific capacity, excellent rate capability and stable long cycle life.

The invention relates to the field of ink-jet printing, and discloses vacuum drying equipment and a vacuum drying method for an ink-jet printing substrate. The vacuum drying equipment for the ink-jet printing substrate comprises a rack, a box body, a first vacuum pump, a vacuumizing pipeline system, a second vacuum pump, a bearing platform, a lifting module, a heating plate and a condensing plate, the box body is arranged on the rack and is internally provided with a vacuum cavity; the first vacuum pump and the vacuumizing pipeline system are used for primarily vacuumizing the vacuum cavity; the bearing platform bears materials to be dried, and the lifting module drives the bearing platform to ascend and descend. The heating plate is arranged on the bearing platform and used for heating materials; the condensing plate is positioned above the bearing platform and is used for condensing the volatilized solvent; the second vacuum pump is used for carrying out limit vacuumizing on the vacuum cavity to completely remove condensed solvent impurities; the vacuum environment is accurately regulated and controlled, the distance between the heating plate and the condensation plate is flexibly adjusted, so that solvent impurities are thoroughly removed, the drying and film forming processes of the OLED substrate are optimized, and the formed film is more uniform.

The invention discloses a moisture-proof and pressure-resistant packaging carton and a preparation method thereof, and relates to the technical field of packaging cartons, the structure of the moisture-proof and pressure-resistant packaging carton is sequentially provided with an outer lining, a corrugated core paperboard and an inner lining from top to bottom, and the outer lining, a corrugated core and the inner lining are bonded through polyvinyl alcohol; soaking the prototype paper in a carboxymethyl cellulose aqueous solution, taking out the prototype paper, soaking the prototype paper in a copper sulfate metal ion solution and an aluminum chloride metal ion solution respectively, and performing hot pressing to obtain lining prototype paper and outer lining prototype paper; the preparation method comprises the following steps: adding polyethyleneimine and methanol into deionized water, uniformly stirring, soaking the outer lining prototype paper into the deionized water, heating to 35-36 DEG C, preserving heat, taking out the outer lining prototype paper, soaking the outer lining prototype paper into the solution A, adding glutaraldehyde, reacting at 25-30 DEG C, taking out the outer lining prototype paper, carrying out vacuum drying for 30-45 minutes, coating the surface of the outer lining prototype paper with the solution B, and carrying out vacuum drying to obtain the outer lining.

The invention discloses a raw coal flotation-electrolysis combined quality-based resource utilization method, which relates to the technical field of coal separation, and comprises the following steps: crushing and grinding raw coal, and carrying out flotation separation to obtain clean coal and tailing slurry; mixing the tailing slurry and a sodium hydroxide solution as an anolyte, carrying out electrolysis by taking the sodium hydroxide solution as a catholyte, and carrying out cathode reduction to obtain hydrogen; filtering, separating, washing and drying the anolyte to obtain an inorganic salt product; mixing the filtrate and the washed solution, concentrating, acidifying until the pH is equal to 3, filtering, washing and drying in vacuum to obtain water-insoluble acid; and acidifying the filtrate until the pH value is 1.5, and carrying out extraction, concentration and vacuum drying to obtain the solid water-soluble acid. According to the method, flotation and electrolysis are combined, the utilization efficiency of coal resources is improved, the technological process is simplified, the cost is reduced, the overall economic benefit is improved through a byproduct high-value product, and a more environment-friendly coal separation and utilization mode is achieved.

The present invention provides a rake type vacuum dryer, comprising an outer casing and a drying liner, a hot air interlayer is formed between the outer casing and the drying liner, a feed port and a discharge port are respectively arranged at the upper and lower ends of the drying liner, a servo motor is further arranged at the side end of the outer casing, a rake rod is arranged at the output end of the servo motor, a plurality of stirring rakes are further arranged on the rake rod, a power source 1 and a pair of push plates are further arranged in the drying liner, the stirring rake is slidably arranged on the rake rod, the power source 1 drives the push plate and the rake rod to move along the rake rod toward the discharge port, by arranging the push plate and making the stirring rake slidably arranged on the rake rod, when materials remain on both sides of the discharge port, the power source 1 drives the push plate and the rake rod to move toward the middle, thereby ensuring the sealing of the drying liner and moving the materials to the discharge port at the same time, preventing excessive accumulation of materials.

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 utility model provides a vacuum drying box for medicine drying, which comprises a box body, a rotating rod capable of rotating along a shaft is vertically arranged in the box body, a plurality of brackets are arranged on the rotating rod, a tray assembly is arranged on the brackets, the tray assembly comprises a first tray and a second tray which are in butt joint, a through hole is formed in the middle of the butt joint position of the first tray and the second tray, and the first tray and the second tray are connected through the through hole. The bracket comprises an annular connecting table fixedly connected to the rotating rod, a plurality of supporting rods are connected to the bottom of the first tray and the bottom of the second tray in a clamped mode, the multiple supporting rods are evenly and fixedly connected to the circumferential direction of the connecting table, and a connecting rod is further vertically and fixedly connected to the interior of the box body; the side, facing the tray assemblies, of the connecting rod is provided with a foldable movable scraping plate corresponding to the upper side of each tray assembly, and the front portions of the movable scraping plates are connected into the corresponding tray assemblies in a bridging mode when the movable scraping plates are folded to be in the horizontal state. The medicine drying device has the advantages that the drying efficiency is effectively improved, dried medicine can be conveniently taken out and collected, and medicine to be dried can be conveniently placed in the medicine drying device.

The invention relates to a preparation method of a high-toughness and high-conductivity PIPD enhanced graphene fiber, which comprises the following steps: mixing a graphene oxide solution and a PIPD solution to prepare a spinning solution, carrying out wet spinning by adopting two coagulating baths, and sequentially carrying out chemical reduction and vacuum drying treatment after spinning to obtain the high-toughness and high-conductivity PIPD enhanced graphene fiber. The content of the PIPD in the spinning solution is 0.1-50 wt% of the graphene oxide; the first coagulating bath is a metal ion / phosphoric acid aqueous solution, and the second coagulating bath is an ethanol / water mixed solution; according to the high-toughness and high-conductivity PIPD enhanced graphene fiber, the elongation at break is 2-20%, the ultimate tensile strength is 250-1500 MPa, the fracture toughness is 10-70 MJ / m < 3 >, and the conductivity is 102-106 S.m <-1 >. The graphene fiber is toughened through a small amount of PIPD, the mechanical property of the graphene fiber is improved, and meanwhile the graphene fiber has good conductivity.

The invention discloses three-dimensional hydrophobic modified activated carbon, which is characterized in that hydrophobic carbon chains are grafted inside and outside activated carbon pores, and the hydrophobic carbon chains are trichlorosilane with different carbon chain lengths. The invention also discloses a preparation method of the three-dimensional hydrophobic modified activated carbon, and the preparation method comprises the following steps: (1) pretreatment: the activated carbon is firstly placed in distilled water for ultrasonic cleaning for 5-10 min, then soaked in a pretreatment activation solution for 5-10 min, and then placed in a drying oven for drying, and the pretreatment activation solution is an ammonia water solution with the pH value of 8-9; (2) three-dimensional modification: taking 5-10 parts by weight of a modifier, dropwise adding the modifier into 20-50 parts by weight of a solvent to obtain a modifier solution, soaking 10-15 parts by weight of pretreated activated carbon into the modifier solution, sealing the whole reaction system, and immediately soaking the reaction system in an ultrasonic environment for 2-4 hours; and (3) post-treatment: cleaning the impregnated activated carbon with a solvent, and carrying out vacuum drying in a vacuum drying oven at 100-150 DEG C for 5-12 hours to obtain the three-dimensional hydrophobic modified activated carbon.

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 provides a preparation method of Al18F tracer integrated freeze-dried powder, a kit and application thereof, and the preparation method comprises the following steps: dissolving 1-10 mg of a precursor by using deionized water, adding a pH buffer solution with the concentration of 0.2-0.5 M and an AlCl3 solution with the concentration of 10 mM, with the ratio of the amount of substance of AlCl3 to the amount of substance of the precursor being 0.8-1.0, then continuously adding a stabilizer solution with the concentration of 0.5 M and 1-4 mg of an excipient, and uniformly stirring to obtain the Al18F tracer integrated freeze-dried powder. And finally, adding deionized water to enable the concentration of the precursor to be 0.5-1.0 mM, uniformly mixing the solution, sub-packaging the solution into 1.5 mL cryopreservation tubes or 2 mL penicillin bottles according to a certain volume, and then putting the cryopreservation tubes or the penicillin bottles into a vacuum freeze dryer to remove water at a low temperature to obtain powder or freeze-dried cakes, and the container is a freeze-dried powder / cake storage container and is used for storing the freeze-dried powder / cakes. Meanwhile, the reaction container is also used during radioactive labeling.

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 PA6 / PEO micro-nanofiber air filtering membrane with a bent form, which comprises the following steps: (1) weighing PA6 particles and PEO powder with a certain mass, and dissolving in a formic acid solution with the mass fraction of 88% to obtain a mixed solution; (2) stirring the mixed solution to obtain a PA6 / PEO spinning solution; (3) forming a fiber membrane under a room-temperature dry condition through a gas jet spinning machine; (4) drying overnight at 60 DEG C to remove the residual solvent; (5) performing heat treatment in a drying oven, and (6) at normal temperature, placing the fiber membrane subjected to heat treatment in a container, and adding deionized water to immerse the fiber membrane; (7) heating the container in a water bath, and repeating the water bath treatment twice; and (8) immediately taking out the sample after the reaction is finished, and performing vacuum drying treatment. According to the invention, oily and salty ultrafine particles can be efficiently filtered at the same time, and the technical problem that effective filtration of fine oily and salty particles is difficult to realize in the prior art is solved by optimizing the structural characteristics of the fiber membrane.

The invention discloses a preparation method of a rapidly-cured expanded graphite-based fuel cell composite bipolar plate, which comprises the following steps: cutting soft cut carbon fiber foam with a three-dimensional structure into the size of the bipolar plate, immersing into liquid resin for 10-30 minutes, and drying in a vacuum drying oven at 25-40 DEG C; and putting the pre-cold-pressed expanded graphite as a top layer and a bottom layer of the bipolar plate into a mold under the pressure of 10-15 Mpa, putting the soft cut carbon fiber foam resin into a middle layer, heating to 90-150 DEG C under the pressure of 10-15 Mpa, keeping for 110 seconds to 58 minutes, and demolding to obtain the composite bipolar plate of the fuel cell. The hot press molding method is simple, the plane conductivity of the prepared bipolar plate reaches 375.8 S / cm, the maximum bending pressure reaches 88.53 N, the bending strength is 61 Mpa, the air tightness is 2.32 * 10 <-8 > cm < 3 > cm < 2 > s <-1 >, the water contact angle is 92 degrees, the corrosion-resistant current is 0.345 mu A / cm < 2 >, and large-scale production can be achieved.

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 compact mycelium-based high-efficiency durable sound insulation composite material and a rapid preparation method thereof, and relates to the field of biological building materials.The method comprises the steps that straw powder, corncob powder, wood chip powder, bran powder, soybean meal and an alkaline mixed additive are mixed to be uniform, aerogel particles, graphene nanosheets and water are added and stirred, and a mixture is obtained; a culture medium is formed, oyster mushroom strains or ganoderma fungus strains are evenly inoculated on the culture medium at the same time in a multi-point injection mode, the injection depth is the same, then the temperature is controlled to be 30-35 DEG C, the humidity is controlled to be 65%-75%, heating is conducted in a microwave heating mode under the ventilation condition, and after mycelia completely cover the culture medium, a culture system is obtained; the culture system is subjected to compression molding under the pressure of 2-5 Mpa, then vacuum drying is performed, the total water content is controlled to be 4% or below, the compact mycelium-based efficient and durable sound insulation composite material is obtained, the production efficiency and the material performance are improved, and no chemical pollution exists.

The utility model discloses a rake type vacuum drying machine for diflufenican active compound production, which comprises a drying cylinder, a frame is arranged in the drying cylinder, fins are arranged on the inner side of the frame, guide grooves are arranged on two sides of the frame, a blanking cylinder is arranged at the bottom end of the drying cylinder, an auger shaft is arranged in the blanking cylinder, and the auger shaft is connected with the drying cylinder. And a discharging motor for driving the auger shaft to rotate is arranged on the outer side of the discharging barrel. According to the material drying device, the defects in the prior art are overcome, through the arrangement of the packing auger, dried materials can be rapidly guided out and collected in a centralized mode, the material drying efficiency is improved, and the material drying device has high social use value and application prospects.

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 utility model discloses vacuum drying equipment which comprises a cabinet body, an upper cover body and an upper cover lifting module, a front cabinet is connected to the front end of the cabinet body, a first upper table top is arranged on the front cabinet, a second upper table top is arranged in the cabinet body, the first upper table top and the second upper table top are matched to form a machining table, an annular frame is arranged on the second upper table top, and an annular heating wire is arranged in the annular frame. A vacuumizing plate is arranged in the annular frame, a vacuumizing hole and an air inlet pipe are arranged on the vacuumizing plate, guide rails are arranged on the left side and the right side of the machining table respectively, a left sliding block and a right sliding block are arranged on the guide rails on the two sides respectively, a chuck is arranged on the two sliding blocks, a moving plate is clamped between the two chucks, and two first air cylinders are arranged behind the machining table; the left sliding block is connected with a piston rod of one first air cylinder, the right sliding block is connected with a piston rod of the other first air cylinder, the upper cover body and the vacuumizing plate are matched to form a sealing cavity, and the upper cover lifting module is connected with the upper cover body. By means of the structure, the workpiece can be rapidly moved to a vacuumizing drying area, and safety is improved.