60 results about "Spray drying" patented technology

The invention provides a composite porous carbon material and a preparation method thereof, and a silicon-carbon negative electrode material and a preparation method thereof, and belongs to the technical field of silicon-carbon negative electrode materials. Liquid resin, biomass carbon and carbon nanotubes are fully mixed in an organic solvent, a high-strength spherical porous carbon material is obtained through processes of spray drying, carbonization, activation and the like, and finally the silicon-carbon negative electrode material is obtained through silicon deposition and carbon coating. The resin coating, the carbon nanotubes and the spherical structure cooperate with one another, so that the strength of the porous carbon structure is greatly enhanced; the high-strength porous carbon base material can effectively relieve the problem of pore fracture caused by silicon expansion and high compaction of the pole piece, improve the first efficiency and slow down long-cycle capacity attenuation.

The invention relates to nano-scale special zirconia powder and a preparation method thereof, and the preparation method comprises the following steps: S1, adding zircon salt, micromolecular polyol, a chelating agent, a surfactant and propylene glycol dimethyl ether into deionized water to prepare a zircon salt solution; s2, dropwise adding the zirconium salt solution into a precipitant for precipitation reaction; s3, octanoic acid is added, stirring is conducted for 1-2 h, ultrasonic treatment is conducted for 20-30 min, and Zr (OH) turbid liquid is obtained; s4, enabling the Zr (OH) turbid liquid to pass through an ion resin column, then acidifying, filtering and washing for multiple times; s5, carrying out ball milling treatment; s6, spraying powder and drying; and S8, calcining to obtain the nano-scale special zirconium oxide powder. According to the nanoscale special zirconium oxide powder and the preparation method thereof, the problems of purity, dispersity and crystal phase stability of nano zirconium oxide are solved through precipitant optimization, purification optimization, low-temperature crystal phase control and the like, a reliable path is provided for industrial production, and the application prospect is wide.

The invention discloses a hard-carbon-doped negative electrode material and a preparation method and application thereof, and the preparation method of the hard-carbon-doped negative electrode material comprises the following steps: S1, carrying out heat treatment on a nitrogen-containing precursor to obtain graphite-phase carbon nitride; grinding into powder, mixing with acid liquor, ultrasonically stirring, and washing to be neutral; drying and adding water to obtain a suspension; s2, mixing and reacting a phenolic compound and an aldehyde compound with an alkaline aqueous solution, then uniformly mixing with the suspension, and carrying out spray drying to obtain dry powder; s3, NaF is placed in a high-frequency plasma reaction bin to form steam, and NaF is deposited on the surface of the dry powder; and S4, in the atmosphere of protective gas, carrying out heat treatment on the dry powder deposited with the NaF, and then carrying out carbon coating. According to the hard carbon-doped negative electrode material provided by the invention, NaF forms steam through a plasma technology to uniformly coat the surface and pores of hard carbon, and then carbon coating is performed through vapor deposition, so that the binding force of NaF is increased, and the specific surface area of the hard carbon material is reduced, and therefore, the hard carbon-doped negative electrode material has high first efficiency and long cycle performance.

The self-lubricating bearing machining system comprises a machine box, a belt transmission device and spraying devices, the belt transmission device and the spraying devices are arranged in the machine box, elastic positioning units used for fixing a bearing and a cleaning and drying unit used for cleaning and drying the bearing are arranged in the machine box, and the number of the elastic positioning units and the number of the spraying devices are both multiple. The multiple elastic positioning units are arranged around the belt transmission device and correspond to the multiple spraying devices one to one, and the elastic positioning units are matched with the belt transmission device. The device has the beneficial effects that the pretreatment operation of cleaning the outer surface of the bearing, the drying operation after cleaning of the bearing, the spraying operation of the bearing and the drying operation after spraying of the bearing can be integrated, functionality is enhanced, the continuity of bearing machining steps is improved, the machining efficiency is improved, and the production cost is reduced. The complexity and the drying cost of the self-lubricating bearing machining system are reduced, the self-lubricating bearing machining system is suitable for cleaning, cleaning and drying, spraying and spraying and drying procedures of bearings of various sizes, universality is high, and practicability is high.

The invention discloses a catalyst for preparing isocaprylic acid through oxidation of high wear-resistant and heat-resistant isooctanol and a preparation method of the catalyst, and the method comprises the following steps: (1) uniformly mixing a zinc source, a phosphorus source and a hydroxyapatite precursor, stirring to form gel, roasting, and grinding to obtain a ZnO / HAP active component; (2) uniformly mixing kaolin and pseudo-boehmite, carrying out ball milling and screening treatment, then continuously adding nano-graphite, and carrying out ball milling and mixing to obtain a composite matrix; (3) adding polyvinylpyrrolidone, polyacrylonitrile and glucose into deionized water, stirring and dissolving to obtain a composite binder solution; (4) mixing the ZnO / HAP active component with the composite matrix and the composite binder, adding a dispersant and deionized water, and carrying out stirring and ultrasonic dispersion treatment to obtain catalyst slurry; and (5) carrying out spray drying molding on the catalyst slurry, and then drying and roasting to obtain the high-wear-resistance and heat-resistance catalyst. The catalyst has high wear resistance and heat resistance, and is suitable for large-scale industrial production.

The utility model provides a plastic spraying drying tunnel for gas cylinders, and relates to the technical field of plastic spraying drying tunnels for gas cylinders. A guide rail is mounted in the plastic spraying oven body, and a limiting table is fixedly connected into the guide rail. A position adjusting seat is mounted in the guide rail, and the bottom of the position adjusting seat is connected with the top of the limiting table; through holes are formed in the front side and the rear side of the position adjusting seat correspondingly, and a threaded column is fixedly connected to the bottom of the position adjusting seat. The fixing rod is pushed outwards through the limiting spring, the fixing rod is driven to hoist the gas cylinder of the fire extinguisher, and the screw rod can be rotated to drive the threaded block to be in threaded connection with the bidirectional screw shaft, so that after the bidirectional screw shaft is rotated, the position of the fixing rod can be adjusted, and the fire extinguisher is fixed. The problems that a fixing structure needs to be replaced according to the models of the fire extinguisher gas cylinders when a worker hoists the fire extinguisher gas cylinders, and the worker cannot quickly install the fire extinguisher gas cylinders of different models on a gas cylinder plastic spraying drying tunnel are solved.

The invention provides a preparation method of a water-proof and oxygen-proof nanocrystal composite material, which comprises the following steps: atomizing and drying a solution I containing a nanocrystal precursor and a polymer to obtain nanocrystal composite particles, dispersing the nanocrystal composite particles in a colloidal solution, ultrasonically and uniformly mixing the nanocrystal composite particles with a solution II containing a water-proof and oxygen-proof polymer, and performing secondary atomizing and drying to obtain the water-proof and oxygen-proof nanocrystal composite material. And forming a polymer protective layer with water and oxygen barrier property on the surfaces of the nanocrystalline composite particles to obtain the water-proof and oxygen-proof nanocrystalline composite material. The nanocrystalline composite material can be dispersed in packaging base materials such as EVA and POE, has high photoelectric conversion efficiency, maintains long-term environmental stability, and remarkably prolongs the service life of a display device. According to the preparation method, the nanocrystalline composite material is prepared by adopting a secondary spray drying process, the destructive effect on the nanocrystalline material in a traditional liquid phase coating method is avoided, the second waterproof oxygen-barrier polymer layer can greatly improve the environmental stability of the nanocrystalline material, and meanwhile, the nanocrystalline material can be prepared with high efficiency and high material utilization rate; and the method is suitable for large-scale production.

The invention relates to the technical field of cracking catalysts, in particular to a high-activity coal gangue cracking catalyst modification process which comprises the following steps: crushing coal gangue, spraying an alkaline pretreatment solution on the surface, and roasting to obtain thermally activated coal gangue powder; soaking the thermally activated coal gangue powder in an acidic treatment solution, heating in a constant-temperature water bath, washing, and drying to obtain acid modified coal gangue powder; soaking the acid-modified coal gangue powder in a metal salt solution, fully dipping through ultrasonic treatment, and drying to obtain high-activity coal gangue powder; and mixing the high-activity coal gangue powder with tricalcium aluminate hexahydrate and water, performing spray drying to generate microspheres, and calcining the microspheres in a kiln to obtain the high-activity coal gangue cracking catalyst. According to the high-activity coal gangue cracking catalyst, through matching and combination of the raw materials and the preparation steps, the catalytic activity of the catalyst can be improved, the internal structure of coal gangue is improved, the mechanical strength is enhanced, and the service life is prolonged.

The application discloses a kind of high-silicon-aluminum ratio NaY zeolite in-situ crystallization microspheres and preparation method and application thereof, belong to catalytic material technical field.High clay, diatomite and water are mixed and beaten, and a modified high clay slurry is formed by adding a silicon promoter, a dispersing agent and a pore-expanding agent during the beating process.The modified high clay microspheres are spray dried into modified high clay microspheres.The modified high clay microspheres are calcined at different temperatures to obtain high clay balls and metakaolin balls.The high clay balls, metakaolin balls, water, silicon source, sodium hydroxide and silicon promoter are mixed to obtain a mixed slurry, which is subjected to aging treatment and in-situ crystallization synthesis reaction to obtain high-silicon-aluminum ratio NaY zeolite in-situ crystallization microspheres.The heavy oil cracking catalyst prepared from the high-silicon-aluminum ratio NaY microspheres prepared by the application has excellent hydrothermal activity stability and stronger heavy oil conversion capacity, and shows higher light oil yield in waste plastic cracking reaction.

The utility model provides a bumper bracket after-spraying drying device which comprises a drying box, a box door is hinged to the front end of the drying box, a transparent observation window is arranged on the box door, a drying machine is arranged at the upper end of the drying box, the air outlet end of the drying machine is communicated with the drying box, and the upper end and the lower end of the drying box are communicated through a plurality of pipelines. The drying device comprises a drying box, a plurality of heating pipes are arranged at the upper end and the lower end of the drying box respectively, flow guide plates are fixedly arranged at the upper end and the lower end in the drying box respectively, air blowing holes which are evenly distributed are formed in the flow guide plates respectively, and a clamping assembly used for clamping the bumper bracket is arranged in the drying box. According to the bumper bracket drying device, the bumper bracket can be dried through the drying machine, hot air blown out of the drying machine can be divided through the flow guide plate and the pipeline, the upper end and the lower end of the bumper bracket are blown at the same time, and the drying efficiency is improved.

The application discloses in-situ carbon-coated cobalt-doped lithium manganese iron phosphate and a preparation method thereof. x Mn 1‑x‑y Co y -MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 y MOF, wherein 0 <

The embodiment of the present application relates to a kind of molybdenum disulfide coated lithium lanthanum zirconium oxygen composite solid electrolyte material and its preparation method.The preparation method includes: ammonium tetrathiomolybdate is dissolved in pure water and dissolved, to obtain ammonium tetrathiomolybdate solution;Lithium lanthanum zirconium oxygen solid electrolyte is added to ammonium tetrathiomolybdate solution, and slurry is prepared by ultrasonic dispersion and stirring;The slurry is spray dried into dry powder;The powder is heat treated in the atmosphere of hydrogen mixed protective gas, to obtain molybdenum dioxide coated lithium lanthanum zirconium oxygen composite solid electrolyte material.

The invention discloses a hollow honeycomb iron sulfide / carbon (FeS2 at C) composite negative electrode material as well as a preparation method and application of the hollow honeycomb iron sulfide / carbon (FeS2 at C) composite negative electrode material. According to the material, SiO2 nanospheres are taken as a template, and the hollow honeycomb FeS < 2 >-C composite material with a core-shell structure is constructed by combining spray drying with a carbon thermal reduction and vulcanization process. FeS2 nanoparticles in the material are uniformly embedded into a porous carbon skeleton, the thickness of a carbon layer is 2-5nm, the aperture is about 350nm, and the specific surface area is 150-300m < 2 > / g. The preparation method comprises the steps of template agent regulation and control, carbon source coating, high-temperature vulcanization and acid pickling and pore forming, and preferred growth of FeS2 crystals and uniform coating of a carbon layer are achieved by regulating and controlling the proportion of Fe (NO3) 3.9 H2O and chitosan and vulcanization conditions. The initial discharge capacity of the material under the current density of 0.5 A / g reaches 1700 mAh / g or above, the capacity retention rate is larger than or equal to 95% after circulation is conducted 100 times, the capacity is kept at 450 mAh / g or above after circulation is conducted 2000 times under the high rate of 10 A / g, and the reversible specific capacity is still kept at 300 mAh / g or above under the ultrahigh current density of 30 A / g. The performance advantage of the composite material is derived from the synergistic effect of a carbon layer conductive network, a porous buffer structure and sulfur vacancy active sites, and the composite material is suitable for a high-power sodium ion battery negative electrode.

The utility model relates to a golden camellia instant tea drying device which comprises a drying cylinder, the bottom end of the drying cylinder is conical, a discharge pipe is arranged at the bottom end of the drying cylinder, a box cover is arranged at the top end of the drying cylinder, and a material spraying drying structure is arranged in the box cover. The utility model relates to the technical field of instant golden camellia powder drying equipment. According to the instant camellia nitidissima tea drying device, through the outer feeding pipe and the outer feeding cylinder, first airflow is introduced into the drying cylinder, wet materials are introduced into the drying cylinder through the inner feeding pipe and the inner feeding cylinder, second airflow is introduced into the drying cylinder through the flow guide pipe, and under the influence of the material spraying and drying structure, the wet materials are dried in the drying cylinder; and the flowing tracks of the first airflow, the wet material and the second airflow are parallel to one another, so that the first airflow or the second airflow can be effectively prevented from entering the cavity where the wet material is located, the wet material is prevented from being dried and hardened in the cavity between the second inner barrel and the third inner barrel, and the problem that the material spraying and drying structure is blocked is solved.

The utility model relates to the technical field of coating drying, and discloses coating paint spraying drying equipment which comprises a frame, a connecting frame is arranged on the inner side of the frame, a motor is fixedly connected to the top of the connecting frame, a connecting rod is fixedly connected to the output end of the motor, a first bevel gear is fixedly connected to the left end of the outer wall of the connecting rod, and a second bevel gear is fixedly connected to the right end of the outer wall of the connecting rod. A flow dividing pipe is fixedly connected to the middle of the connecting frame, a transmission rod is rotationally connected to the middle of the flow dividing pipe, a second bevel gear is fixedly connected to the top of the transmission rod, the second bevel gear is connected with the first bevel gear in a meshed mode, and a plurality of fan blades are fixedly connected to the lower middle portion of the outer wall of the transmission rod at equal intervals. According to the drying device, the motor drives the fan blades to rotate in the flow dividing pipe through the connecting rod, the first bevel gear, the second bevel gear and the transmission rod, so that wind power is formed to blow heat energy generated by the heating pipe downwards, and the heat energy is evenly blown to objects needing to be dried after being divided by the flow dividing pipe.

The invention relates to the technical field of microcapsule powder, in particular to microcapsule powder with a peptide-polysaccharide system and a preparation method. The microcapsule powder comprises the following components in percentage by mass: 2-3% of wall material reinforced particles; 3 to 5 percent of chitosan; 10 to 15% of whey protein; 1-2% of an emulsifier; 35 to 45% of maltodextrin; the content of transglutaminase is 0.05 to 0.1 percent; and the balance of functional grease. The functional grease comprises composite grease, a functional additive and a cross-linking agent in a mass ratio of (40-50): 5: 1; the preparation method of the microcapsule powder comprises the following steps: S1, preparing an inner-layer water phase; s2, preparing an oil phase; s3, preparing an outer layer water phase; s4, preparing a water-in-oil-in-water emulsion with a peptide-polysaccharide system; s5, preparing micro-capsule powder; the microcapsule powder disclosed by the invention has a water-in-oil-in-water structure, so that the stability is remarkably improved; then a compact'peptide-polysaccharide 'network structure is formed through transglutaminase, the interfacial tension is reduced, thermal denaturation is resisted in the subsequent spray drying process, and the embedding rate is increased.

Process for the preparation of hollow spherical glass particles comprising at least SiO2, Al2O3, and an alkali metal oxide, wherein the process comprises the preparation of precursor particles comprising at least SiO2, Al2O3, and an alkali metal oxide by mixing the starting materials, slurrying the starting materials with water followed by spry-drying and heat-treating the obtained precursor-particles at a temperature from 1000° C. to 1800° C., preferably from 1300° C. to 1600° C. by contacting the precursor particles with at least one naked flame.

The utility model discloses plastic spraying drying equipment which mainly solves the problem that a plastic spraying part is heated unevenly in the prior art. The equipment comprises a cabinet body with an opening in the front side, and the cabinet body is connected with a cabinet door through hinges. The U-shaped supporting frame is arranged in the cabinet body and can slide along the limiting sliding grooves, and operation and maintenance are convenient. A hanging assembly is designed on the inner side of the U-shaped supporting frame and comprises a plurality of hooks which are sequentially arranged in a staggered mode and used for hanging plastic spraying parts. And branches are arranged at the end parts of the hooks, and the tail ends of the branches are inclined upwards to ensure that the plastic-sprayed part is stably and uniformly heated. The fan is arranged at the top in the cabinet body, external air is introduced, and uniform heating is achieved through the heating flow guide structure. The heating flow guide structure comprises a first flow guide cavity, a flow guide plate, an electric heating wire and a plurality of flow guide holes in the flow guide plate, and it is ensured that hot air is evenly distributed on each plastic spraying part; the plastic spraying part drying device can effectively improve the drying efficiency and quality of plastic spraying parts, and ensures that each plastic spraying part can be fully and uniformly heated.

The invention discloses macroporous silicon dioxide microspheres as well as a preparation method and application thereof, and belongs to the technical field of nano high-tech materials. The main aperture of the silicon dioxide microsphere is about 100nm, the primary particle size is 50nm, the agglomerated particle size D50 is 100mu m, and the specific surface area is gt; the pore volume is 1.0 to 1.75 cm / g. According to the preparation method, rice hull-based high-purity sodium silicate with the modulus of 3.25 and carbon dioxide are used as main raw materials, and the designed core technology is that a double-template system composed of polystyrene microspheres and a macromolecular block copolymer is adopted, and under specific conditions, processes such as carbon dioxide carbonization gel, spray drying granulation, oil-phase thermocuring and programmed roasting are used. The rice hull-based green high-tech material obtained by the method has the advantages of mild reaction process, good controllability of aperture and particle size, and high mechanical strength of the product. The macroporous silica microspheres prepared by the method are particularly suitable for the fields of drug controlled release systems, biological macromolecule chromatographic separation, immobilized enzyme carriers, high-performance catalyst carriers and the like.

The invention discloses a fly ash blending combustion method and system based on two-stage mixing, and belongs to the technical field of coal chemical combustion. The method comprises the following steps that S1, raw coal is conveyed into a grinding cavity to be smashed and ground, and pulverized coal is obtained; s2, conveying one path of fly ash into the grinding cavity, and carrying out primary mixing on the fly ash and the pulverized coal in the grinding cavity to obtain a primary mixture; s3, the first-stage mixture and the second-path fly ash are jointly conveyed into the mixer for secondary mixing, and a second-stage mixture is obtained; and S4, the secondary mixture is combusted, and high-temperature flue gas obtained after combustion is subjected to gas-solid separation and then subjected to spray drying. According to the method, the fly ash is subjected to two-stage mixing, and meanwhile, the doping ratio in the first-stage mixing and the second-stage mixing is controlled, so that internal agglomeration of the fine ash can be effectively broken; fly ash is fully dispersed and mixed with pulverized coal, and sufficient viscosity and fluidity of materials can be guaranteed. Meanwhile, the doping amount of the fly ash can be effectively increased, so that large-scale blending combustion application of the fly ash is realized.

Process for the preparation of hollow spherical glass particles comprising at least SiO2, Al2O3, and an alkali metal oxide, wherein the process comprises the preparation of precursor particles comprising at least SiO2, Al2O3, and an alkali metal oxide by mixing the starting materials, slurrying the starting materials with water followed by spry-drying and heat-treating the obtained precursor-particles at a temperature from 1000° C. to 1800° C., preferably from 1300° C. to 1600° C. by contacting the precursor particles with at least one naked flame.

The utility model discloses a decoration plate spraying device for decoration engineering construction, which comprises a base, a horizontal moving structure, a horizontal spraying and airing structure and a spraying structure, the horizontal moving structure is arranged on the base, the horizontal spraying and airing structure is arranged on the horizontal moving structure, the spraying structure is arranged on the base, and the spraying structure is arranged on the base. The horizontal moving structure comprises a first fixing base, a sliding column, a sliding base, a motor and a threaded rod, the first fixing base is fixedly arranged on the base, the sliding column is fixedly arranged on the base, and the sliding base penetrates through the sliding column and is arranged in a sliding mode. The utility model belongs to the technical field of decorative plate spraying equipment, particularly relates to a decorative plate spraying device for decorative engineering construction, and effectively solves the problems that most decorative plate spraying devices are used for vertically placing and spraying decorative plates in parallel, flow marks are generated on the surfaces, and paint spraying surfaces are easy to be scratched when the decorative plates are dried, aired and transferred.

The invention belongs to the technical field of asbestos tailing utilization, and particularly discloses a separation method of mixed sulfate in serpentine tailing leachate. The separation method provided by the invention comprises the following steps: carrying out quantitative analysis on the serpentine leachate, and adjusting the mass ratio of nickel, iron and magnesium elements in the leachate to a set ratio; carrying out spray drying to obtain mixed sulfate dry powder, placing the mixed sulfate dry powder in a fluidized bed for two-stage roasting, and cooling and aging a roasted thermal decomposition product; and carrying out water leaching on the roasting thermal decomposition product by using a multi-stage countercurrent system, and separating to obtain a magnesium sulfate solution and a nickel / iron oxide. The high-purity high-value magnesium sulfate and nickel / iron oxide products are prepared from the asbestos tailings which are low in cost and harmful to the environment, and the effects of turning waste into wealth, improving the ecological environment and improving the economic benefits of enterprises are achieved.

The electric intelligent anti-mosquito automatic fire extinguishing power distribution cabinet has a protective shell designed on the outer side of the cabinet body, a through hole is formed in the surface of the protective shell, an inclined plate is arranged on the inner wall of the through hole, the mosquito lamp emits light to attract mosquitoes, the mosquitoes are killed by the electric net, the mosquito corpses are collected by the collecting box, the inclined plate, the collecting box and the through hole are correspondingly arranged, the light emitted by the mosquito lamp cannot easily irradiate out of the through hole, normal ventilation of the through hole is ensured, when the temperature in the power distribution cabinet exceeds a limited value, the temperature sensor sprays dry powder in the dry powder box into the power distribution cabinet through the nozzle by the controller to extinguish the fire source, the sliding groove and the sliding block are used in pairs, the lamp head moves with the power box, and maintenance is facilitated, the three measures reduce the failure frequency of the power distribution cabinet, timely automatic fire extinguishing is realized, the practicability is very high, and the production efficiency of enterprises is improved.

The invention relates to the field of spraying drying tunnels, in particular to a spraying drying tunnel with an air channel purification function, purification cabins are connected to the two sides of an air channel, a circulating air channel is formed by the purification cabins and a top air outlet mechanism at the top of the drying tunnel, and a material guide frame for mounting a filter cloth roll is arranged in each purification cabin; rotatable feeding fluted discs are arranged on the two sides of the material guiding frame and used for driving the filter cloth roll to move along the material guiding frame, a twist shaft rotating in linkage with the feeding fluted discs is arranged below the feeding fluted discs, and the twist shaft drives the air inlet box to move in a reciprocating mode through a transverse moving mechanism. According to the device, the filter cloth roll is driven by the feeding fluted disc to realize continuous replacement, and a plurality of beating plate mechanisms can be linked to beat and purge a polluted surface during replacement, so that the maintenance convenience of the filter mechanism and the removal efficiency of pollutants can be effectively improved while the situation that a traditional filter plate needs to be disassembled is avoided, and the purification efficiency of an air channel is improved.

The utility model provides spraying and drying equipment for an I-shaped steel structure, which comprises a spraying chamber and a drying chamber, the spraying chamber and the drying chamber are arranged in parallel, drying mechanisms are symmetrically arranged on the two sides in the drying chamber, each drying mechanism comprises a vertically arranged drying heating pipe, a fan is arranged at the rear end of each drying heating pipe, and the fan is arranged in the drying chamber. A hot air guide plate is arranged at the front end of the drying heating pipe, a rear end opening of the hot air guide plate faces the drying heating pipe, a front end opening of the hot air guide plate faces the center of the drying chamber, and the front end opening of the hot air guide plate is smaller than the rear end opening, so that heat of the drying heating pipe is gathered towards the center under blowing of the fan.

This invention discloses a doped hard carbon anode material, its preparation method, and its application. The preparation method of the doped hard carbon anode material includes the following steps: S1: Heat-treating a nitrogen-containing precursor to obtain graphitic carbon nitride; grinding it into powder, mixing it with acid, ultrasonically stirring, washing with water until neutral; drying and adding water to obtain a suspension; S2: Mixing phenolic compounds and aldehyde compounds with an alkaline aqueous solution, reacting them, then mixing them evenly with the suspension, and spray-drying to obtain dry powder; S3: Placing NaF in a high-frequency plasma reaction chamber to form vapor, depositing NaF on the surface of the dry powder; S4: Heat-treating the NaF-deposited dry powder in a protective gas atmosphere, and then performing carbon coating. The doped hard carbon anode material provided by this invention uses plasma technology to uniformly coat the surface and pores of hard carbon with NaF vapor, and then performs carbon coating through vapor phase deposition, increasing the binding force of NaF and reducing the specific surface area of ​​the hard carbon material, thereby exhibiting high initial efficiency and long cycle life.

The invention provides a waste plastic oil cracking catalyst and a preparation method thereof.The method comprises the steps that kaolin is roasted and then treated with alkali liquor, and modified kaolin is obtained; pseudo-boehmite and zinc salt are mixed and then subjected to ball milling, and a zinc-aluminum composite material is obtained; the modified kaolin, a zinc-aluminum composite material, a phosphorus-modified ZSM-5 molecular sieve, a macroporous template agent, aluminum sol and water are mixed and pulped, spray drying is performed to prepare microspheres, roasting is performed, and the waste plastic oil cracking catalyst is obtained. The pore structure and iron pollution resistance of the catalyst are improved through kaolin reaming modification, zinc-aluminum material synthesis and macroporous template addition. When the catalyst is used for cracking iron-containing waste plastic oil, the yield of triene and the total liquid yield in a product are increased, and the yield of coke is reduced.