71 results about "Fluidized bed drying" patented technology

The invention relates to the technical field of fluidized bed drying, in particular to an improved fluidized bed dryer and a drying process. The drying machine comprises a material bed and a transverse moving mechanism; the bottom of the material bed is connected with a vibration source and can ventilate and dry upwards from the bottom; the transverse moving mechanism comprises a driving part assembled at the bottom of the material bed and a plurality of transverse moving beams distributed in the conveying direction of the material bed, and the transverse moving beams are slidably installed on the material bed in the width direction of the material bed. The driving piece is used for intermittently and synchronously driving the plurality of transverse moving beams and driving the adjacent transverse moving beams to reversely slide in a reciprocating manner; a plurality of first brushes and a plurality of second brushes are detachably installed on each transverse moving beam in the length direction of the transverse moving beam. Through various auxiliary drying treatments on materials and cleaning of the bed surface, the drying uniformity and sufficiency of material finished products are guaranteed, the uniformity of material particle sizes is improved, the quality of the dried material finished products is guaranteed, and follow-up stable storage is facilitated.

The invention discloses a small multifunctional integrated drying device, and relates to the technical field of industrial drying experiment equipment. The small multifunctional integrated drying device comprises a bottom plate, a vertical supporting plate is fixedly connected to the middle of the upper surface of the bottom plate, a fluidized bed drying chamber, a spray drying chamber, a main controller, a shared centrifugal fan and a shared electric heater are fixedly installed on the front face of the vertical supporting plate, and an air filter and an induced draft fan are fixedly installed on the upper surface of the bottom plate; a cyclone dust collector is fixedly installed on the back face of the vertical supporting plate, a three-way pipe is fixedly connected to the top of the shared electric heater, a fluidized bed feeder is fixedly installed on one side of the top of the fluidized bed drying chamber, and a supporting ring, an annular base, a motor, a fixing plate and an air pressure sensor are fixedly installed on the lower portion of the inner wall of the fluidized bed drying chamber. The system can integrate the fluidized bed function and the spray drying function, and energy-saving and efficient operation is achieved through the shared air path, the heat energy recovery system and the self-cleaning distribution plate.

The application discloses a kind of compound fertilizer with nitrogen fertilizer slow-release and biocontrol function and preparation method, it is related to microbial compound fertilizer field, including the following components: nitrogen source carrier, physical net trapping material, 3,4-dimethyl pyrazole phosphate, biocontrol component, binder.A kind of preparation method, including the following steps: after silanization modification treatment is carried out to attapulgite, with polyglutamic acid aqueous solution mixed reaction, obtain self-assembly gel;Bacillus subtilis is embedded and handled, rhamnolipid is pre-emulsified, chitosan oligosaccharide is crosslinked with boric acid treatment, and is blended;Nitrogen source carrier is heated to melt, add self-assembly gel, mix evenly;Temperature control, add 3,4-dimethyl pyrazole phosphate, and keep warm reaction;Cooling, add the blend obtained in step S200, binder, mix evenly;Extrusion granulation, after fluidized bed drying, slow-release coating is carried out, and the target compound fertilizer is obtained.The application makes disease control efficiency to improve to 89.2%, and blocks nitrosomonas AMO enzyme activity for 120 days.

The utility model discloses a refining device and a refining system for ultra-clean polypropylene. The refining device comprises a slurry premixing tank, a washing container, a centrifugal filter, a solvent recovery tower, a reflux tank, a fluidized bed dryer and a gas-liquid separator. According to the device, materials and energy are fully recycled, ash such as metal substances and oligomer entrained by polypropylene powder can be effectively reduced, and even electrical-grade polypropylene can be obtained. According to the utility model, on the premise of obtaining a refined polypropylene product, environment-friendly, low-consumption and stable long-period operation can be realized.

The application discloses a spray drying micro-capsule granulation system and method with an internal fluidized bed, and relates to the technical field of micro-capsule spray granulation. The system comprises a granulation tower, an internal fluidized bed, a first detection unit, a state sensing unit, an external fluidized bed, a second detection unit, a numerical simulation unit and a control unit. The primary particles generated by the internal fluidized bed drying granulation tower form a semi-finished product, and the semi-finished product is dried by the external fluidized bed to obtain a finished product. The numerical model unit creates and updates a first-order numerical model of the internal fluidized bed and a second-order numerical model of the external fluidized bed. The control unit evaluates the credibility of the humidity of the semi-finished product through the first-order numerical model, adjusts the operation parameters of the external fluidized bed through the second-order numerical model, and updates the first-order numerical model based on the updated second-order numerical model after updating the second-order numerical model through the humidity of the finished product. The two-stage drying is realized in a cooperative and adaptive control mode, and the product quality stability and system robustness are effectively improved.

The utility model discloses a material distributing device of a food-grade fixed fluidized bed, which comprises a material distributing device main body, a feeding channel is arranged at the top end of the material distributing device main body, a discharging channel is arranged at the bottom end of the material distributing device main body, an impeller material distributing valve is arranged in the material distributing device main body, and the impeller material distributing valve comprises a material distributing rotor and an impeller arranged on the material distributing rotor. A driving device is arranged on the outer side of the distributing rotor. On the premise of an original fixed fluidized bed drying system, the high-speed rotating impeller distributing valve is additionally arranged at the feeding end, downward air generated by high-speed operation of an impeller of the impeller distributing valve is mixed with materials and then enters the fixed fluidized bed, the materials are prevented from being blocked in a concentrated mode, the air distributing plate is prevented from being blocked, the production process is optimized, and the operation efficiency is improved.

This invention discloses a smart responsive flame-retardant polypropylene foamed beads, its preparation method, and its application, specifically relating to the field of flame-retardant polymer foam materials technology. The preparation method includes firstly, co-extruding a skin melt and a core melt into a composite die to form a core-skin structure melt strip with the core melt as the core and the skin melt as the skin. The core-skin structure melt strip is then pelletized to obtain composite PP substrate microparticles. These microparticles are then placed in an EPP autoclave foaming equipment, where they undergo impregnation and stirring, programmed pressure relief, crushing, centrifugal drying, and fluidized bed drying to obtain composite EPP foamed beads. This invention, through the synergistic design of core-skin functional partitioning and smart responsive components, transforms the traditional passive and dispersed flame-retardant mode into an active and centralized high-efficiency barrier mode, achieving intelligent and efficient flame retardancy.

The present invention provides a process for preparing agglomerated excipient particles with improved tabletability, the process comprising the steps of: a) feeding at least one excipient in particulate form and a binder liquid into a continuous mixing granulator (1); b) processing the at least one excipient and the binder liquid in the continuous mixing granulator (1) to produce agglomerated excipient particles; and c) drying the agglomerating excipient particles, preferably in a fluidized bed dryer (104); wherein the method preferably comprises at least one particle reshaping step comprising reshaping the agglomerated excipient particles downstream of the continuous mixing granulator (1) before and / or after the drying step to form reshaped agglomerated excipient particles. The invention also provides the use of the agglomerated excipient particles in a tabletting process, as well as a system for preparing the agglomerated excipient particles.

This invention relates to the field of chemical experimental equipment technology and discloses a multi-process integrated chemical drying experimental device, including a device frame. A vortex air pump is fixedly connected to the inner bottom frame of the device frame. An electric heater is fixedly connected to the output end of the vortex air pump. The output end of the electric heater is fixedly connected to a spray drying tower, a fluidized bed drying tower, and a vibrating fluidized bed dryer through a multi-way switching valve. Cyclone separators are fixedly connected to the exhaust ends of the spray drying tower, the fluidized bed drying tower, and the vibrating fluidized bed dryer. A hopper is fixedly connected to the upper surface of the device frame. A near-infrared online moisture meter is fixedly connected inside the device frame. A near-infrared online moisture display is fixedly connected to the outer surface of the near-infrared online moisture meter. The multi-way switching valve enables independent supply of hot air to each drying device, which can be adapted to the drying experimental needs of different powder / granular materials such as polyvinyl chloride resin powder and Shuanghuanglian granules.

The utility model relates to feed inlet cleaning technical field discloses a fluidized bed dryer feed inlet cleaning structure, including fluidized bed dryer body, the fluidized bed dryer body top fixedly connected with support plate, the support plate top fixedly connected with feed inlet body, the support plate inside is provided with cleaning assembly, the cleaning assembly includes gear ring, transmission gear and driving gear, the gear ring the transmission gear with the driving gear all rotationally connected in the support plate inside, the gear ring with the transmission gear interlock, the transmission gear with the driving gear interlock. Through motor drive driving gear rotation, through transmission gear drive gear ring rotation, make the scraper inside gear ring adhesion feed inlet body inner wall rotation, can effectively clean the material of feed inlet inner wall adhesion, reduce material residue, keep the feed inlet unobstructed, reduce artificial cleaning cost, promote cleaning efficiency.

The invention provides a staged self-adaptive control method for a drying process of a polyvinyl chloride fluidized bed, and relates to the technical field of polyvinyl chloride chemical production process control. Wherein in the constant-speed drying stage, model reference adaptive control (MRAC) is adopted, and the hot air temperature is dynamically adjusted to stabilize the drying rate; model predictive control (MPC) is adopted in the speed reduction drying stage, and accurate water content regulation and control and energy consumption optimization are achieved through predictive optimization. According to the invention, the influence of water content fluctuation of fed materials and hot air temperature interference in the PVC drying process can be effectively resisted, so that the water content of PVC is stably reduced, and the fluctuation of the water content in the drying process is reduced.

The invention relates to the field of rubber, in particular to a rubber composition and a preparation method thereof. The preparation method of the rubber composition comprises the following steps: mixing the reinforcing material and water to obtain a mixed solution; mixing the mixed solution with a latex solution to obtain a mixture; and feeding the mixture to a spray fluidized bed dryer for spray drying to obtain the rubber composition, the latex solution comprises a natural rubber solution, a polybutadiene emulsion, a polyisoprene emulsion and a styrene butadiene rubber emulsion. The preparation method of the rubber composition is low in energy consumption and environmentally friendly, the filler and the auxiliaries in the obtained rubber composition are evenly dispersed, and meanwhile the rubber composition has the advantages of being good in mechanical property, high in wear resistance, high in wet grip performance, low in rolling resistance, high in safety and low in cost.

This utility model discloses an industrial wastewater sludge metal recovery device, including a fluidized bed drying box. Support rods are symmetrically distributed on the side wall of the fluidized bed drying box, and a screening and purification box is located below the fluidized bed drying box, inside the support rods. A feeding port is located on one side of the upper end of the fluidized bed drying box. The fluidized bed drying box and the screening and purification box are connected by a discharge pipe. A drying and dehumidification mechanism and a purification mechanism are respectively provided inside the fluidized bed drying box and the purification mechanism. The drying and dehumidification mechanism includes a permeable conveyor belt and a turning assembly located on the inner wall of the fluidized bed drying box. The turning assembly is located inside the permeable conveyor belt, and air inlets are evenly distributed on the side wall of the fluidized bed drying box on one side of the permeable conveyor belt. The purification mechanism consists of a sliding rod, a supporting slider, and a screen bucket. This utility model belongs to the field of wastewater sludge treatment technology, specifically an industrial wastewater sludge metal recovery device.

The application provides a production process of a microencapsulated shrimp feed for the post-larva stage, which realizes uniform proportioning of raw materials through ingredient mixing and secondary mixing, completes fine processing of the raw materials through a segmented type of crushing, forms granules at normal temperature and pressure through wet granulation, controls the moisture content of the materials through fluidized bed drying, completes fat spraying and coating processing through fluidized bed treatment, accurately selects qualified granules through detection and screening, maintains a low-oxygen state inside the package through sealing and packaging, and improves the hygiene and safety of the feed through irradiation sterilization. Each process cooperates with each other, can stably output feed granules with a particle size D90 of less than 130 mu m, effectively adds and retains heat-sensitive nutrients, guarantees the balanced nutrition of the product, improves the water stability of the feed through coating treatment, is not easy to cause water mixing when put into water, can improve the water breeding environment, and reduces feed waste. The process can realize batch production to meet the use demand of the market, and provides technical support and reference basis for the production of the post-larva stage feed.

The present application relates to a method for extracting lipids from microorganisms, comprising the steps of: (a) preparing a microbial fermentation solution containing lipids; (b) fluidized-bed drying the microbial fermentation solution of step (a) so as to form microbial granules; and (c) press-extracting the microbial granules of step (b), wherein a solvent is not used during lipid extraction.

The utility model relates to the technical field of drying technology, and discloses a temperature control type fluidized bed dryer with an anti-blocking function, which comprises a dryer body, supporting legs are fixedly connected to the bottom of the dryer body, a discharging pipe is fixedly connected to the bottom of the dryer body, and an anti-blocking discharging mechanism is arranged at the top of the dryer body. In the using process, a first motor works and is matched with a first baffle, raw materials are conveniently discharged in batches, the situation that the drying efficiency is reduced due to blockage and the like caused by excessive discharging is avoided, a second motor works and is matched with a first spring, the raw material drying process is more thorough, and the drying efficiency is improved. The inner wall of the machine body is cleaned while the using efficiency is improved, the situation that next drying is affected by residues is avoided, the angle of a second baffle is conveniently fixed by rotating a handle and cooperating with a second spring, and therefore the amount of gas entering the machine body is controlled, different raw materials can be conveniently machined, and the applicability is improved.

The utility model relates to the field of pesticide powder drying, and discloses a vibration type fluidized bed dryer with a dust collection function, which comprises a vibration dryer, a limiting part is arranged on the edge of the top of the vibration dryer, a filtering part is arranged in the top end of the limiting part in a sliding manner, and a dust removal part is arranged in the limiting part; the limiting part comprises a supporting frame, a dust removal shell is fixedly connected to the top of the supporting frame, a conveying pipe is arranged in the center of the side face of the dust removal shell, and limiting holes are symmetrically formed in the outer surfaces of the upper portions of the supporting frame and the dust removal shell; the limiting component, the dust removal component and the filtering component are arranged on one side of the top of the vibration dryer, hot airflow discharged by the vibration type fluidized bed dryer can be preliminarily filtered, and therefore the filtering pressure of the bag-type dust remover is reduced, the dust removal period of the bag-type dust remover is shortened, the dust removal efficiency is guaranteed, and environment pollution is avoided.

The invention relates to the technical field of menthol preparation, in particular to a preparation method of ethanol-free food-grade water-soluble menthol, which comprises the following steps: raw material preparation, micronization pretreatment, constant-temperature inclusion reaction, gradient shear emulsification and low-temperature fluidized drying. The raw materials comprise food-grade L-menthol, beta-cyclodextrin, polyglycerol fatty acid ester, sucrose fatty acid ester and deionized water, and ethanol is not used in the whole process; the micronization pretreatment is to crush the L-menthol until the particle size is less than or equal to 50 microns; ethanol is not used as a cosolvent in the whole process, only food-grade L-menthol, beta-cyclodextrin, polyglycerol fatty acid ester, sucrose fatty acid ester, deionized water and other raw materials meeting the GB2760 food additive standard are adopted, the water solubility of menthol is improved through the synergistic effect of physical inclusion and emulsification, ethanol residues are not detected in a final product, and the preparation method is simple and convenient to operate. And potential safety hazards caused by a traditional ethanol hydrotropy process are thoroughly avoided.

The invention provides a preparation method of a rosaxostat capsule, which specifically comprises the following steps: preparing the following raw materials in parts by mass: rosaxostat and an auxiliary agent in a ratio of (0.5-5): (35-45); the auxiliary agent is prepared from a filling agent, an adhesive, a disintegrating agent, a lubricating agent and a wetting agent, and the mass part ratio of the filling agent to the adhesive to the disintegrating agent to the lubricating agent to the wetting agent is (148 to 156) to (8.0 to 9.5) to (7.5 to 8.5) to (0.8 to 1.2) to (38 to 40); and then, sequentially carrying out raw material pretreatment, wet granulation, wet size stabilization, fluidized bed drying, dry size stabilization, total mixing and filling by adopting two-step sieving, so as to obtain the rosaxostat capsule which simultaneously considers particle uniformity, flowability and dissolution stability. According to the invention, by designing targeted process steps and cooperating with auxiliary materials, the core problems of poor particle uniformity, large dissolution fluctuation, unstable drug effect and the like in the prior art are effectively solved, and high-quality and stable production of the rosaxostat capsule is realized.

This invention provides a low-energy-consumption fluidized bed dryer granulation machine control system. The system includes a fluidized bed parameter control unit, a multi-dimensional monitoring unit, a moisture content closed-loop control unit, and a waste heat recovery unit. By establishing a quantitative correlation model between inlet air parameters, bed state, and moisture content changes, it dynamically matches hot air parameters with the material's fluidized bed drying requirements. Combined with exhaust waste heat recovery and preheating of the inlet air, it achieves precise energy utilization. Multiple batches of experiments have verified that this invention significantly reduces energy consumption compared to traditional equipment, greatly improves hot air utilization, and achieves high precision in final moisture content control. It is suitable for large-scale production scenarios such as pharmaceutical granules, food additives, and chemical powders, demonstrating significant energy-saving and consumption-reducing effects.

The utility model discloses a fluidized bed drying device for anionic polyacrylamide production, which comprises a drying device and a feed hopper, the feed hopper is fixedly communicated with the left side of the drying device, the left side of the drying device is fixedly connected with a placement table, the placement table is sleeved on the surface of the feed hopper, and the feed hopper is fixedly connected with the placement table. The top of the placing table is fixedly connected with a lifting structure, and a cleaning structure is arranged on the surface of the lifting structure. Through the cooperative use of the drying device, the feeding hopper, the placing table, the lifting structure, the frame, the lead screw, the motor, a moving block, a placing rod, a cleaning structure, an electric cylinder, a transmission rod, a placing block, a cavity, an electric part, a cleaning disc, a supporting plate and a through hole, the problem that the area of a channel which can be actually used for discharging is reduced due to materials attached to the inner wall is solved; and the feeding quantity fluctuates along with time, so that insufficient feeding of a production line is caused.

The application discloses a cloth bag dust removal air bag inflation and deflation dust removal system and method suitable for a fluidized bed dryer, which mainly comprises a support framework, a dust removal cloth bag, a gas charging and discharging bag and a flexible transmission assembly. The support framework is cage-shaped and is fixed to the top of the fluidized bed to provide support for the spherical cloth bag. The dust removal cloth bag is wrapped outside the framework and is connected with the gas charging and discharging bag in the interior through the flexible transmission assembly. The gas charging and discharging bag drives the pull rope to shake the cloth bag through periodic gas charging and discharging, so that dust removal is realized. The structure of the fluidized bed is optimized, and a flow guide cone is adopted to realize uniform distribution of airflow and reduce the pressure difference before and after the cloth bag. The method adjusts the shaking amplitude and frequency of the cloth bag by controlling the volume and frequency of the gas charging and discharging of the air bag, so that efficient dust removal is realized. The application has the advantages of high dust removal efficiency, low energy consumption, long service life of the cloth bag and the like, is suitable for the fluidized bed drying process of the pharmaceutical, food, chemical and other industries, and is suitable for the dynamic adjustment requirement of different dust characteristics.

This invention discloses a fluidized bed dryer for coal chemical industry, relating to the field of fluidized bed dryers. It includes a drying chamber containing two parallel rotating shafts rotating in opposite directions. Each shaft has a stirring rod slidably connected to it along a direction parallel to its own radial direction. A tension spring connects the end plate of each shaft to the side wall of the rotating shaft. A sliding rod, propelled by the stirring rod, is obliquely slidably disposed within a fixed box. Gears are fixedly connected to both ends of the sliding rod, and stirring plates are spaced apart along its axial direction. This invention utilizes the elasticity of the tension spring to maintain the sliding extension and contraction state of the stirring rod during rotational contact with the air distribution plate, ensuring continuous and effective contact between the end of the stirring rod and the air distribution plate. This also reduces the difficulty of equipment cleaning and maintenance costs, prevents material accumulation from clogging the air distribution plate, ensures continuous and stable operation of the equipment, and is suitable for drying high-viscosity, easily agglomerated materials in coal chemical industry.

The invention discloses a spray-drying micro-capsule granulation system with a built-in fluidized bed and a spray-drying micro-capsule granulation method, and relates to the technical field of micro-capsule spray granulation. The system comprises a granulation tower, a built-in fluidized bed, a first detection unit, a state sensing unit, an external fluidized bed, a second detection unit, a numerical simulation unit and a control unit. Primary particles generated by the granulation tower are dried by the built-in fluidized bed to form a semi-finished product, and then the semi-finished product is dried by the external fluidized bed to obtain a finished product. The numerical model unit creates and updates a first-order numerical model of the built-in fluidized bed and a second-order numerical model of the external fluidized bed, the control unit evaluates the reliability of the humidity of the semi-finished product through the first-order numerical model, and the second-order numerical model adjusts the operation parameters of the external fluidized bed. The second-order numerical model is updated through the finished product humidity, and then the first-order numerical model is updated based on the updated second-order numerical model. Cooperative and adaptive control of two-stage drying is realized, and the product quality stability and the system robustness are effectively improved.

The utility model relates to the technical field of vibrated fluidized beds, in particular to a drying anti-caking device of a vibrated fluidized bed, which comprises a lower box body, the top of the lower box body is fixedly connected with an upper box body, the side inner wall of the lower box body is fixedly connected with a spreading plate, and a cylindrical spray pipe is connected in a hole of the spreading plate in a penetrating manner. According to the device, the material spreading plate, the penetrating type cylindrical spray pipe and the knocking assembly located at the top of the side inner wall are integrated between the lower box body and the upper box body, a compact mechanical and pneumatic composite structure which works cooperatively is formed, and the cylindrical spray pipe penetrates out of a hole of the material spreading plate, is used for material fluidization and can directly blow and sweep the surface of the material spreading plate; the knocking assembly is located above the material spreading plate, an installation foundation is provided for subsequent physical rapping, material deposition is preliminarily prevented from the structure and airflow, key knocking is conducted on the edge area where materials are stacked and adhered in the vibration conveying process, and conveying dead angles are effectively eliminated.

The utility model discloses a drying machine for snow-melting agent production, which comprises a vibrated fluidized bed drying machine body, a perforated plate is arranged in the vibrated fluidized bed drying machine body, a discharge pipe is arranged at the bottom of the vibrated fluidized bed drying machine body, a crushing mechanism is arranged in the vibrated fluidized bed drying machine body, and the crushing mechanism comprises a first sieve plate. The first sieve plate is installed at one end of the perforated plate, the vibrated fluidized bed dryer body is provided with an extrusion plate matched with the first sieve plate, and gaps between the first sieve plate and the end, away from the perforated plate, of the extrusion plate are gradually reduced. Compared with the prior art, in the process of drying the snow-melting agent, the drying machine for producing the snow-melting agent can crush the snow-melting agent which is adhered to one another to form large blocks, so that potential safety hazards caused by slipping of a vehicle due to the large blocks of the snow-melting agent are avoided to a certain extent, fine snow-melting agent particles can be screened out, and the snow-melting agent production efficiency is improved. And resource waste and environmental pollution caused by scattering of the small-particle snow-melting agent during use are reduced as much as possible.

This invention belongs to the field of food processing technology, specifically relating to a fast-dissolving granule for Yangpi San (a traditional Chinese medicine formula) that effectively proliferates probiotics and its preparation method. The preparation method includes the following steps: (1) extracting the raw material of Yangpi San to obtain a clear liquid; (2) performing inclusion to obtain an inclusion solution; (3) continuously spraying the inclusion solution onto the surface of seed microparticles and simultaneously performing fluidized bed drying to obtain granules with high active ingredient loading; (4) uniformly spraying a hydrophilic material onto the surface of the granules with high active ingredient loading and performing a second fluidized bed drying, and then uniformly spraying a hydrophobic material while simultaneously performing a third fluidized bed drying to obtain fast-dissolving granules for Yangpi San. The beneficial effects of this invention are: through the organic integration of "extraction-inclusion-granulation-coating", it systematically solves the multiple technical contradictions of slow dissolution, easy moisture absorption, and easy loss of functional components in the traditional dosage form of Yangpi San, and achieves synergistic effect.

The invention discloses a natural sea salt gargling salt with oral cleaning and sterilizing functions and a preparation method of the natural sea salt gargling salt. The gargle salt is composed of 100% natural sea salt, wherein the sea salt is crystallized and separated out when the concentration of brine is 25-29 baume degrees. The preparation method comprises the following steps: taking seawater in a specific sea area, naturally evaporating and concentrating at high temperature in summer for about one month until the seawater is crystallized; the method comprises the following steps: collecting salt crystals, crushing the salt crystals to a specific particle size by air flow, homogenizing and mixing, performing low-temperature sterilization by adopting fluidized bed drying and ultraviolet ozone, and finally packaging in a low-humidity clean environment. The pure natural gargling salt which is quick to dissolve, mild in taste, safe in microbial index and good in stability is prepared by selecting raw materials and optimizing the process on the premise of not needing any additive, and the requirements of the market on pure and safe oral care products are effectively met.

The utility model discloses a double-layer vibrated fluidized bed dryer which comprises a bottom plate, a drying machine body is arranged on the bottom plate through a vibration spring and a supporting plate, a feeding port and a discharging port are formed in the two ends of the drying machine body respectively, chains are in transmission connection with the interior of the drying machine body through a transmission shaft and a chain wheel, and a plurality of fluidized bed plates are rotationally arranged between the two chains. The fluidized bed plate is provided with a plurality of fluidized bed plates, the two ends of the fluidized bed plates are rotatably connected with the chain, the adjacent fluidized bed plates are hinged, when the chain is driven by the motor to rotate, the fluidized bed plates are driven by the motor to rotate, and the material scraping plate is arranged on the upper side of the material outlet through the transverse moving support and the air cylinder. And a plurality of fluidized bed plates can be driven to horizontally move and adjust, so that dried materials can be conveniently conveyed to a discharge port to be discharged, the discharging is convenient and rapid, and the discharging thoroughness is high.

The utility model relates to a kind of low-melting-point substance drying systems, it includes: drying component;Air inlet component, the air inlet component includes air inlet pipe, with the nitrogen gas storage tank being communicated with the air inlet pipe, first stop valve being installed between the nitrogen gas storage tank and the air inlet pipe, with the air inlet pipe being communicated with air inlet pipe, second stop valve being installed on the air inlet pipe, with the air inlet pipe being communicated with air blower and with the heater being communicated with the air blower and with the fluidized bed dryer being communicated;Feeding component, the feeding component includes wet material storage tank, with the wet material storage tank being connected with plate-and-frame filter press, with the plate-and-frame filter press being matched with cage crusher and with the screw feeder being connected with one end of the cage crusher and being communicated with the other end of the fluidized bed dryer. It can be used for drying air-sensitive substance or air-insensitive substance, greatly improve the application range of drying system.