166 results about "Fluidized bed drying" patented technology

The invention discloses material fluidization drying equipment, which is used for fluidizing and drying materials by heating gas and comprises a fluidization drying unit, a heat exchange unit, a heat exchange unit, a heat exchange unit, a heat exchange unit, a heat exchange unit and a heat exchange unit, wherein the fluidization drying unit consists of a heat-insulating layer and a plurality of material conveying pipes arranged in the heat-insulating layer; each material conveying pipe is used for feeding independently, and the to-be-dried material runs downwards and is fluidized and dried by the ascending heating gas in the descending process; and the circulating feeding unit is arranged on the periphery of the heat preservation layer and used for feeding materials to the material conveying pipe and feeding the dried materials into the material conveying pipe again, and circulating drying is formed. The invention further discloses a material fluidized drying method. According to the equipment and the method disclosed by the invention, the heated fluidizing gas is used for drying the material; materials can be circularly and repeatedly dried through the circular feeding unit; mass and heat transfer of the materials can be enhanced through the fluidized drying unit, and the drying efficiency is effectively improved.

The utility model belongs to the technical field of solid waste treatment, and particularly relates to a fly ash harmless and resourceful treatment system. The harmless and recycling treatment system for the fly ash comprises a mixing and stirring unit, a fluidized bed drying and preheating unit, a dioxin catalytic cracking unit, a washing and desalting unit, an evaporative crystallization and salt production unit and a flue gas treatment unit, the mixing and stirring unit is used for stirring and mixing fly ash, a curing agent and a catalyst according to a set proportion; a gas outlet of the dioxin catalytic cracking unit is connected with a gas inlet of the fluidized bed preheating and drying unit, a gas outlet of the fluidized bed preheating and drying unit is connected with a gas inlet of the evaporative crystallization salt-making unit, and a gas outlet of the evaporative crystallization salt-making unit is connected with a gas inlet of the flue gas treatment unit. According to the utility model, the energy consumption is greatly reduced and the cost is saved while harmless and resourceful treatment of the fly ash is realized.

The utility model discloses a multilayer fluidized bed dryer which comprises a shell, a plurality of layers of air distribution plates are arranged in the shell, the air distribution plates are of a porous structure, partition plates are arranged on the upper surfaces of the air distribution plates to guide flow, and cooling pipelines are installed on the lower surfaces of the air distribution plates to adjust the temperature. A feeding hole is formed in the upper part of the shell, a high-temperature gas inlet is formed in the lower part of the shell, and wet materials and high-temperature gas flow reversely; an active regulation and control means is adopted, cooling pipelines are arranged on one or more bed layers, the temperature of the bed layers is autonomously regulated, and the conditions that the overall temperature field of a large dryer is difficult to regulate, and one or more bed layers are overheated or deviated to set working conditions are overcome; and meanwhile, the problem of equipment shutdown caused by material melting, air distribution plate blocking and bed blocking is solved, and the device is good in stability, capable of running for a long period and suitable for large-scale production.

The invention discloses a preparation method and application of magnesium glycinate granules, and relates to the technical field of magnesium glycinate granule preparation.The preparation method comprises the steps that povidone and polyvinyl alcohol are adopted as adhesives for wet granulation, the polyvinyl alcohol is prepared into slurry with the concentration of 10%, magnesium glycinate and povidone are put into a wet granulator to be evenly mixed, and the magnesium glycinate granules are obtained; and adding polyvinyl alcohol slurry with the concentration of 10% to prepare slurry, performing wet granulation, putting the prepared granules into a drying machine, performing boiling drying, and finishing the dried granules through a screen, thereby obtaining the finished product magnesium glycinate granules. By optimizing the use of the adhesive, the Maillard reaction of magnesium glycinate in the storage and shelf life is effectively avoided, the stability and appearance of the product are kept, and the quality and market competitiveness of the product are improved; by adopting the magnesium glycinate particles provided by the invention, the compressibility is obviously improved, the pressed tablets are high in strength, and the magnesium glycinate particles can be produced on a large scale.

The invention provides a traditional Chinese medicine granule fluidized bed drying uniformity online monitoring and improving method and device, relates to the field of traditional Chinese medicine preparation production and online quality control, and solves the technical problem of uniformity judgment deviation caused by single-bed data isolated monitoring. The method comprises the following steps: inputting secondary bed outlet particle spectral data into a spectral model to obtain a secondary bed predicted water content M2, and integrating temperature data of each bed, process parameters and the secondary bed predicted water content M2 to construct a database. And an input vector set is generated after preprocessing. And inputting the input vector set into a principal component analysis model, performing PCA dimension reduction on the input vector set, extracting main components, and inputting the main components into a Hotelling T-party monitoring model. And calculating a control limit based on multiple batches of historical qualified data, comparing the T-party statistical magnitude with the control limit to judge a drying uniformity grade, and outputting a corresponding regulation and control strategy according to the drying uniformity grade. The method is used in the production and on-line quality control process of the traditional Chinese medicine preparation.

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 invention relates to the field of old asphalt regeneration, in particular to an old asphalt mixture regeneration device and a regeneration process thereof.The old asphalt mixture regeneration device comprises a storage device used for storing materials, a fluidized bed drying system, a roller drying system, a stirring main machine and a dust removal system; the fluidized bed drying system is used for drying and metering small-particle-size asphaltic sand and comprises a feeding hopper, a fluidized bed, a first metering device and a first smoke exhaust device. The material storage device comprises a stock bin, a material overturning mechanism arranged in the middle of the stock bin and used for lifting and overturning materials and a discharging mechanism arranged at the lower end of the stock bin, an air inlet and an air outlet are formed in the two opposite side walls of the stock bin respectively, a feeding port and a discharging port are formed in the stock bin, and the discharging port is communicated with the discharging mechanism; and hot air circulating systems are arranged on the air inlet and the air outlet. The technical problem that asphaltic sand is easy to accumulate and adhere is solved.

The utility model relates to the technical field of vibrated fluidized bed dryers, and provides vibrated fluidized bed drying equipment for ammonium sulfate production, which comprises an equipment shell and a fluidized bed, the fluidized bed is arranged in the equipment shell, drying components are arranged on two sides of the equipment shell, and a material distribution component is arranged between the interior of the equipment shell and the fluidized bed. The vibration assembly is arranged outside the equipment shell, the feeding cover is fixed to the top in the equipment shell, a conveying belt is arranged in the equipment shell, and a plurality of scrapers are arranged on the surface of the conveying belt. According to the technical scheme, the problems that in the related technology, when to-be-dried ammonium sulfate is continuously added into the vibrated fluidized bed dryer, the ammonium sulfate is prone to being accumulated on the top of a fluidized bed, materials are accumulated, finally, the ammonium sulfate cannot be evenly heated, water in the ammonium sulfate deviates, and the drying effect and the production quality of the materials are reduced are solved.

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.

A stable pharmaceutical composition for oral administration, comprising sitagliptin and dapagliflozin, wherein said active ingredients are substantially free of contact from each other. A process for the preparation of a stable pharmaceutical dosage form for oral administration, comprising: Step 1: Weigh sitagliptin hydrochloride monohydrate and Microcrystalline Cellulose and sieve; Step 2: Wet granulation Step 3: Drying the granules in fluid bed dryer; Step 4: Sizing the granules; Step 5: Weigh dapagliflozin base, lactose monohydrate, and sodium starch glycolate, premix them and sieve; Step 6: Mixing granules from step 4 with excipients from step 5; Step 7: Lubrication with magnesium stearate, and Step 8: Compression of the homogeneous powder obtained from step 7 under controlled humidity in mono-layer tablets in a rotary tabletting machine. An alternative process comprising the following steps: Step 1: Weigh sitagliptin hydrochloride monohydrate and Microcrystalline Cellulose and sieve; Step 2: Wet granulation Step 3: Drying the granules in fluid bed dryer; Step 4: Sizing the granules; Step 5: Weigh dapagliflozin base, lactose monohydrate, and hydroxypropylcellulose and sieve; Step 6: Dry granulation of second active ingredient and the intra-granular excipients of step 5 and mix; Step 7: Sizing the slugs or flakes obtained from step 6; Step 8: Pre-Mixing the granules from step 4 and step 7; Step 9: Weigh sodium starch glycolate and sieve; Step 10: Mixing; Step 11: Lubrication with magnesium stearate, and Step 12: Compression of the homogeneous powder obtained from step 11.

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 invention provides an arrangement for reducing static charge in a fluid bed dryer. The arrangement includes a hollow cylinder having an inner surface and an outer surface. The inner surface has a plurality of slotted projections formed radially at equal intervals along the axis of the hollow cylinder. The outer surface has an ionizing apparatus mounted on each of the slotted projections through a retention means. The arrangement further includes a pair of coupling means at both ends of the hollow cylinder for coupling the arrangement to the hot air supply duct of the fluid bed dryer. On applying a voltage, the ionizing apparatus, generate positive and negative ions into the hollow cylinder. The generated positive and negative ions are carried by the hot air to the sample drying unit of the fluid bed dryer for neutralizing the static charge generated during the drying of the sample.

The utility model relates to the technical field of fluidized beds, in particular to a fluidized bed drying device which comprises a fluidized bed and a drying box arranged on the outer side of the fluidized bed, an air distribution seat is fixedly installed at the bottom of the fluidized bed, an air distribution plate is fixedly arranged at the top of the air distribution seat, and a supporting seat is arranged below the air distribution seat. A vibration mechanism is arranged between the supporting seat and the air distribution seat, an exhaust port is fixedly formed in the top end of the outer side of the fluidized bed, a bin door is rotationally arranged at the bottom end of the outer side of the fluidized bed in a sealed mode, a feeding port is formed in the top of the fluidized bed, a conveying pipe is fixedly installed on the left side of the drying box, and a heating bin is formed in the drying box. A circulating fan and a heater are arranged in the heating bin, and the fluidized bed drying device is arranged, so that the situation that an air distribution plate is blocked is avoided through the structural design in a vibration mechanism, and continuous operation of a fluidized bed is facilitated.

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 invention provides a yang-warming, turbidity-clearing and weight-reducing composition and a preparation method thereof, and relates to the field of weight-reducing compositions. The traditional Chinese medicine composition comprises the following raw materials in parts by weight: 5-25 parts of unprocessed radix aconiti lateralis, 30-70 parts of gypsum, 10-25 parts of rhizoma anemarrhenae, 10-20 parts of cassia twig, 8-20 parts of honey-fried licorice root, 5-15 parts of glutinous rice, 20-30 parts of semen coicis, 10-20 parts of poria cocos and 5-20 parts of rhizoma atractylodis macrocephalae. The preparation method comprises the following steps: S1, slicing unprocessed radix aconiti carmichaeli, steaming for 8 hours with high-pressure steam at 120 DEG C, drying at 60 DEG C until the water content is less than 8%, crushing, and sieving with a 100-mesh sieve S2, drying gypsum, rhizoma anemarrhenae, cassia twig and honey-fried licorice root at 70-80 DEG C, crushing and sieving with a 100-mesh sieve; s3, adding 9-10 times of water into the glutinous rice, boiling until the glutinous rice is gelatinized, and filtering to obtain a colloid mixture; and S4, uniformly mixing the medicinal powder obtained in the step S2 with the colloid mixture according to a ratio of 1: 0.3, granulating with a 18-mesh sieve, and drying with a fluidized bed at 45-50 DEG C until the water content is less than or equal to 5% to obtain the composition. According to the composition provided by the invention, the gypsum and the rhizoma anemarrhenae clear stomach heat and inhibit appetite, and the radix aconiti carmichaeli and the cassia twig warm kidney yang to improve the basal metabolic rate, so that the disruption is reduced and the deficiency is reduced.

The invention relates to the technical field of garbage fly ash treatment, and provides a garbage fly ash washing treatment method and system.The garbage fly ash washing treatment method comprises the steps that fly ash washing liquid is evaporated to obtain concentrated feed liquid; the concentrated feed liquid enters an evaporation crystallizer to be evaporated and crystallized to obtain crystal slurry liquid; centrifugally separating the crystal slurry to obtain sodium chloride crystal salt; controlling the water-salt ratio to wash the sodium chloride crystal salt to obtain mother liquor; the water-salt ratio is the ratio of the mass of the washing water to the mass of the sodium chloride crystal salt; evaporating the mother liquor to obtain sodium chloride wet crystal salt; fluidizing and drying the sodium chloride wet crystallized salt to obtain a sodium chloride crystallized salt product; obtaining the purity of the sodium chloride crystal salt product, and determining the purity fluctuation; when the purity fluctuation of the sodium chloride crystal salt product exceeds a target fluctuation range, triggering to adjust the water-salt ratio, so that the purity fluctuation of the sodium chloride crystal salt product is within the target fluctuation range. According to the method and the system, the purity fluctuation of the sodium chloride crystal salt product is reduced to be within + / -1.2% from + / -2.5%.

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 invention provides a loratadine tablet and a preparation process thereof. The preparation method specifically comprises the following steps: adding loratadine, lactose anhydrous and a first batch of corn starch into a wet granulator, and uniformly stirring to obtain a wet mixture; adding purified water at a certain temperature into the second batch of corn starch, uniformly stirring to form a dispersion liquid, mixing the dispersion liquid with the boiled purified water, and uniformly stirring to obtain corn starch slurry; taking the prepared corn starch slurry as an adhesive, adding the adhesive into a wet granulator, and stirring and granulating; granulating the granulated granules by using a first screen, and drying by using a fluidized bed; granulating the dried granules again by using a second screen, uniformly mixing the granules with the disintegrating agent, uniformly mixing the granules with the lubricant, and tabletting to obtain the tablet. By adopting the method provided by the invention to prepare the loratadine tablet, the problems of poor stability and high related substance content of the loratadine tablet are solved. The whole production process method is simple, efficient, low in required energy consumption, easy to operate and especially suitable for large-scale industrial production.

The utility model discloses an anti-residue fluidized bed drying device which comprises a machine body shell, a material storage groove formed in the upper side of the machine body shell, a discharging plate arranged on the right side of the machine body shell, a collecting bin arranged on the right side of the discharging plate, and a discharging barrel installed on the left side of the material storage groove, and a first driving motor is arranged on the rear side of the discharging barrel, a discharging opening is formed in the lower end of the discharging barrel, and a breathable conveying belt is arranged at the lower end of the discharging opening. According to the anti-residue fluidized bed drying equipment, bearing parts can be conveniently cleaned in real time in the using process, so that materials are not prone to adhering to and remaining on the surfaces of the bearing parts in the drying process, the bearing parts are prevented from being corroded and influenced by the materials, the service life of the equipment is guaranteed, meanwhile, the materials are conveniently and evenly injected in the using process of the equipment, and the service life of the equipment is prolonged. And the materials can be easily and evenly laid on the surface of the bearing part, the drying effect of the device is improved, and the better using effect is achieved.

The utility model relates to a fluidized bed dryer which comprises a filtering bin, a material bearing plate used for filtering materials is arranged in the filtering bin, a plurality of air inlet hoppers are arranged at the bottom of the material bearing plate, and a heat supply mechanism is arranged at the bottom of the filtering bin; the heat supply mechanism comprises an air supply box arranged at the bottom of the filter bin, one end of the air supply box is communicated with a heater, the other end of the heater is communicated with a fan, and the bottom end of the air inlet hopper is communicated with the air supply box; and the heater comprises a pipeline, a shell is arranged outside the pipeline, and a spiral electric heating wire located on the outer side of the pipeline is arranged in the shell. According to the device, through cooperation of the material bearing plate, the air inlet hopper, the air supply box and the heater, hot air can rise evenly and stably and make uniform contact with materials on the material bearing plate, and the heating efficiency is improved. And it is ensured that the materials are fully dried in the fluidized state, and the drying efficiency is improved.

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 invention relates to an ammonium chloride drying and tail gas treatment method and device, and belongs to the technical field of ammonium chloride production. The traditional ammonium chloride drying process adopts fluidized bed drying and has the problems of difficult tail gas treatment, large heat loss, high energy consumption, difficult cost control and the like. The problems are effectively solved by adopting a rotary dry ammonium furnace to replace a fluidized bed drying process and combining a novel tail gas comprehensive recovery tower. The drying method comprises the steps of wet ammonium crushing, mixing, drying, cooling, tail gas treatment and the like, efficient drying is achieved through steam indirect heating, and tail gas is subjected to heat recovery, acid pickling and water washing and then reaches the standard to be discharged. The device comprises a wet ammonium vibrating screen, a premixer, a rotary dry ammonium furnace, a powder flow cooler, a tail gas treatment unit and the like, and by optimizing equipment configuration and process parameters, the steam utilization rate is increased, the drying energy consumption is reduced, the tail gas output is reduced, the tail gas treatment efficiency is improved, tail gas up-to-standard emission is realized, the production cost is reduced, and the production cost is reduced. And the economic benefit and the environmental protection level of enterprises are improved.

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.

Provided is a method for producing hydroxypropyl methylcellulose acetate succinate by which particle density increment is suppressed and dissolution time is shortened. The method for producing hydroxypropyl methylcellulose acetate succinate essentially includes a liquid removal step, a first drying step, and a second drying step, wherein the first drying step involves drying of hydroxypropyl methylcellulose acetate succinate using a fluid-bed dryer until it reaches a water content of 30% by mass while maintaining the product temperature at 28° C. or lower.

The invention relates to the technical field of lithium battery raw material processing, in particular to a fine crushing device and process for a lithium manganese iron phosphate material. The fine crushing device comprises an airflow crushing machine body, and a grading assembly is arranged at the top end in the airflow crushing machine body; the sanding machine body is positioned on one side of the airflow crushing machine body; the fluidized bed drying and coating machine body is positioned on one side of the sanding machine body; the opening and closing assembly comprises an annular pipe arranged on the outer side of the jet mill body in a sleeving mode and adjusting bases evenly arranged above the annular pipe at intervals in the circumferential direction of the outer wall of the jet mill body. The adjusting assembly comprises an annular plate arranged on the outer side of the airflow smashing machine body in a sleeving mode and sliding blocks fixedly arranged at the front end and the rear end of the inner wall of the annular plate. The fine crushing device for the lithium manganese iron phosphate material can be used for inspecting a high-pressure airflow pipe, reducing the pressure of an air source, reducing the temperature of a grinding space, avoiding manganese oxidation, synchronously completing drying and coating of lithium manganese iron phosphate, and avoiding secondary agglomeration.

A system for preparing fertiliser, comprising: a dry matter concentrator 10 (e.g., fluid bed drier) configured to receive manure, slurry, digestate and / or sludge F and to increase the dry matter content thereof; and a scrubber system 20 configured to receive off gases A from dry matter concentrator, with the scrubber system configured to create a scrubbing liquor B from the off gases, and to mix the liquor with the manure, slurry, digestate and / or sludge. The scrubber system may remove ammonia from off-gases, and / or receive a reagent for chemically binding ammonia into the scrubbing liquor. The system may comprise a pressurisation unit to increase scrubbing liquor pressure, and / or flow regulation device to regulate scrubbing liquor flow. Also disclosed is a method for preparing fertiliser, comprising: receiving offgases from the dry matter concentrator; creating scrubbing liquor from off gases; and mixing the scrubbing liquor with manure, slurry, digestate or sludge. The system and methods aim to increase the nutrient content of fertiliser products.

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.