47 results about "Triacetin" patented technology

The invention provides a glyceryl triacetate production parameter control method and system based on reinforcement learning, and relates to the technical field of optimization control methods, and the method comprises the steps: obtaining the production parameters of glyceryl triacetate; based on the kinetic model, constructing a kinetic equation of the esterification reaction of glycerol and acetic acid; constructing a digital twinborn simulation environment of the glyceryl triacetate production process; defining a reinforcement learning framework by taking a digital twin simulation environment as a scene; according to the reinforcement learning framework, taking the Elman neural network as a state predictor, and predicting the state of the glyceryl triacetate; solving the reinforcement learning framework through an MO-MPO algorithm, and determining an optimal control strategy and an optimal production parameter sequence corresponding to the optimal control strategy; judging whether the process capability index is smaller than a process capability index threshold value or not; if yes, continuing to solve the reinforcement learning framework; otherwise, outputting an optimal production parameter sequence; and controlling the optimal production parameter sequence through a PID (Proportion Integration Differentiation) control algorithm.

Orally administered compositions comprising triacetin are presented that increase the concentration of short chain fatty acids in the gut, namely acetic acid, wherein the compositions comprising triacetin are palatable at desirable concentrations. The triacetin formulations can also be orally administered to a dysbiotic subject to increase short chain fatty acid (SCFA) concentrations in the gut of the subject while substantially avoiding gas production in the subject. Advantageously, administration of contemplated compositions also increases gut barrier integrity and helps restore a balanced gut microbiome.

The invention provides a long-acting microsphere sustained release preparation and a preparation method thereof, and belongs to the technical field of sustained release preparations, the long-acting microsphere sustained release preparation is prepared from the following raw materials of effective components: 9.5 to 10.5 parts of antipsychotic drug, 48 to 50 parts of hydroxypropyl-beta-cyclodextrin, 50 to 52 parts of polylactic acid-glycolic acid copolymer, 1.25 to 1.3 parts of glycerol triacetate and 10 to 11 parts of polyvinyl alcohol. The preparation method comprises the following steps: firstly, the hydroxypropyl-beta-cyclodextrin is used for clathration of the antipsychotic drug, the obtained clathrate compound is further clathrated by the polylactic acid-glycolic acid copolymer, and the long-acting microsphere sustained release preparation is obtained. According to the invention, the double-valve design of beta-CD and PLGA synergistic inclusion is utilized, so that the preparation can realize two-stage release; the macroscopic slow release characteristic of the PLGA is combined with the microcosmic express characteristic of the hydroxypropyl-beta-cyclodextrin, so that the technical limitation of a single carrier is broken through.

A filter material is shown comprising a cellulose fiber-based substrate, an additive and an adhesion promoter, wherein the mass ratio of the additive and the adhesion promoter is at least 1:3 and at most 2:1, and the additive and the adhesion promoter together constitute at least 3% and at most 40% of the mass of the cellulose fiber-based substrate, wherein the additive is triethyl citrate, triacetin or a mixture of these substances, and wherein the adhesion promoter is selected from the group consisting of ethanediol, propanediol, butanediol, pentanediol and glycerin diacetate or mixtures thereof.

The utility model provides a glycerol triacetate cooling crystallization device, which relates to the technical field of cooling crystallization devices, and comprises a mixing assembly, the mixing assembly comprises a connecting rod arranged in an inner cavity of a reaction kettle body, a supporting rod is fixed on the side surface of the connecting rod, and a first stirring rod is fixed on the side surface of the supporting rod; a first scraping plate is fixed to one end of the first stirring rod, a second stirring rod is fixed to the bottom of the connecting rod, and a first guide groove is formed in the side face of the second stirring rod. By arranging the reaction kettle body, a reaction space can be provided for the reaction of glycerol triacetate, and by arranging the jacket layer, glycerol triacetate can be subjected to cooling crystallization processing; according to the reaction kettle, a supporting rod can be supported by arranging a connecting rod, glycerol triacetate can be mixed by arranging a first stirring rod, and glycerol triacetate attached to the inner wall of the reaction kettle body can be scraped off by arranging a first scraping plate.

The utility model relates to the technical field of glyceryl triacetate production, and discloses a glyceryl triacetate storage tank which comprises a storage tank body, a feeding pipe fixedly connected to the top of the storage tank body, a temperature sensor fixedly connected to the top of the storage tank body and an exhaust balance valve fixedly connected to the top of the storage tank body. A stirring device is arranged in the storage tank, an adjusting device is arranged on the left side of the storage tank, a supporting rod is fixedly connected to the bottom of the storage tank, and a discharging pipe is fixedly connected to the bottom of the storage tank. Cold water or hot water is flexibly injected through the water inlet in the top of the water storage tank, after the water pump is started, water in the water storage tank is continuously pumped into the water storage layer between the outer layer and the inner plate of the material storage tank through the water inlet pipe, efficient heat exchange is conducted on the water and materials in the tank, heating or cooling is achieved, and then the water obtained after heat exchange flows back to the water storage tank through the water outlet pipe. The temperature is accurately regulated and controlled through a circulation mechanism, and it is ensured that the glyceryl triacetate is at the ideal storage temperature.

The present application belongs to the technical field of textiles, and specifically discloses a kind of embroidery with PU layer and its processing technology.The embroidery with PU layer includes mesh layer and PU layer, and the PU layer, by weight, includes the following raw materials: 60 80 parts of polyether polyols, 50 70 parts of 2,4 toluene diisocyanate, 6 15 parts of vinyl trimethoxy silane, 25 35 parts of modified talc, 13 20 parts of modified glass fiber, 7 13 parts of triacetin and 9 15 parts of graphene.The embroidery with PU layer prepared by the present application has higher mechanical strength, tear resistance and elasticity, and subsequently contributes to embroidery process, so that the insertion of needle and thread or penetration of PU layer, PU layer is also not easy to tear.

A filter tip for a smoking article and a smoking article are provided. A filter for a smoking article comprises: a lyocell tow comprising lyocell fibers and a phenol-based reducing substance dispersed in the lyocell tow; the phenol reducing substance comprises a mixture of triacetin and a phenol reducing substance, wherein the phenol reducing substance comprises triacetin; tA); the content of the triacetin per 1 mm length of the lyocell tow is from 0.10 mg to 1.50 mg.

The invention relates to the technical field of glyceryl triacetate, and discloses a glyceryl triacetate refining processing reaction device and a processing method thereof.The device comprises a refining kettle, a condenser and a receiving tank, the refining kettle is communicated with the condenser through a distillation pipe, and the condenser is communicated with the receiving tank through a fraction guide pipe; a heat conduction sleeve is assembled on the outer side of the refining kettle in a sleeving mode, an oil discharging device is integrally formed at the bottom of the heat conduction sleeve, a cooling assembly is rotationally assembled in an inner cavity of the refining kettle, and a blocking ring is pushed to move downwards by means of the gravity and injection pressure of cooling water, so that heating oil in a liquid storage cavity is replaced out and discharged out of the oil discharging device; and the discharged heating oil can drive the cooling assembly to drive materials in the refining kettle to rotate and accelerate discharge of fractions, and along with rotation of the cooling assembly, the rotation speed of the materials in the refining kettle can be accelerated, heat dissipation can be accelerated, and the cooling effect can be improved.

The invention relates to the technical field of glycerol triacetate purification, and discloses a glycerol triacetate purification processing device which comprises a cooling tank, a sliding rail is arranged in the cooling tank, a sliding block is slidably arranged in the sliding rail, and a storage tank is fixedly connected to the outer wall of the sliding block. A partition plate is fixedly connected to the interior of the storage tank, the first turning plate is rotatably mounted in the partition plate, a second turning plate is movably connected to the side of the first turning plate, and a movable ball rod is slidably arranged in the second turning plate. A first turning plate and a second turning plate are arranged on a partition plate, when the first turning plate and the second turning plate are kept in a horizontal state, a channel on a first filter screen is blocked, and when the first turning plate and the second turning plate are folded, the channel is opened, solid-liquid separation is achieved, meanwhile, crystallized impurities on the first filter screen are scraped through movement of the second turning plate, and therefore the solid-liquid separation effect is achieved. And the flow rate of liquid is improved.

The invention discloses a low-temperature refining method of glyceryl triacetate, and relates to the field of fine chemical engineering, and the low-temperature refining method comprises the following steps: step 1, preparing a crude glyceryl triacetate in advance, the acidity of the crude glyceryl triacetate being 0.005-0.08%, and the purity of the crude glyceryl triacetate being greater than or equal to 99.0%. By combining multiple synergistic effects of nitrogen protection, the specific adsorbent, the alkaline compound and the phase transfer catalyst, the energy consumption and the production cost are greatly reduced, the acidity of the product is reduced to 0.001% or below, the chromaticity is smaller than or equal to 5, the purity is larger than or equal to 99.5%, the peculiar smell is completely eliminated, and compared with a traditional high-temperature process, the method shortens the reaction time by 50% or above, and the method is suitable for industrial production. Compared with the prior art, the method has the advantages that the production efficiency is obviously improved, meanwhile, the product stability is fundamentally improved, the shelf life is prolonged to 24 months, the problems of acid pantothenic acid, color change and the like in the storage and transportation processes are effectively solved, and the method is particularly suitable for production of food-grade high-purity glyceryl triacetate and long-term sea transportation export requirements.

To provide a water-based emulsion adhesive mainly composed of a vinyl acetate-based polymer exhibiting good adhesiveness to water-repellent paper.SOLUTION: There is provided a water-based emulsion adhesive which comprises 0.3 to 5.0 pts.mass of an acrylic polymer containing an amino group, 5 to 20 pts.mass of a polyvinyl alcohol and 10 to 30 pts.mass of a plasticizer selected from the group consisting of triacetin, a diethylene glycol butyl ether acetate, diethylene glycol monoethyl ether acetate, an ethylene glycol monobutyl ether acetate, 3-methoxybutyl acetate and a propylene glycol monomethyl ether acetate, based on 100 pts.mass of a vinyl acetate-based polymer containing no ethylene group as a structural unit.SELECTED DRAWING: None

This invention provides a distillation and dehydration apparatus for the preparation of triacetin, comprising a distillation column, a water inlet, an exhaust outlet, a cooking furnace, and a condenser. The distillation column is movably mounted on top of the cooking furnace, and the exhaust outlet is connected to one side of the top of the distillation column. This invention facilitates the containment of thickened oils during distillation, preventing rapid loss and resulting in a smaller amount obtained through distillation. It addresses existing problems where excessively high concentrations of steam are directly condensed during esterification, affecting subsequent condensation rates and causing some triacetin raw material to be lost with the steam, leading to waste. Furthermore, incomplete removal of the extracted esterified raw material after cooking can affect the efficiency of subsequent cooking. Additionally, some raw material drawn into the column may remain in the pipes and on the column sidewalls, and the esterified raw material mist in the steam cannot be utilized, increasing production costs.

The invention relates to a method for cleaving and at least partially recycling the starting components of a thermoset epoxy resin which is the polymerization product of a dicarboxylic acid diglycidyl ester of formula (I) and a diamine of formula (II): (I) wherein R1 represents a C1-20 alkylene group, H2N-R2-NH2 (II) wherein R2 represents a C1-20 alkylene group, but the two amino groups are not directly bonded to an aromatic ring; the thermoset epoxy resin has substantially the following structure: (A) wherein the wavy lines each represent the bonding of a nitrogen atom to another 2-hydroxypropyl group, where the method comprises the following steps a) to e): a) subjecting the resin to alcoholysis to obtain the corresponding diester of the corresponding dicarboxylic acid and a diester of the corresponding dicarboxylic acid according to formula (I) and a diester of the corresponding diester of the corresponding dicarboxylic acid according to formula (I); the present invention relates to a corresponding diamine ("polyol") of formula (II) substituted by 1, 3-dihydroxypropyl: polyol; b) performing acetylation at elevated temperature to obtain acetamide of diamine ("diamide") and triacetin of formula (II): diamide triacetin; c) deacetylating the diamide to obtain a diamine monomer of formula (II); d) deacetylating the triacetin to obtain glycerol, which is subsequently converted to glycidol; and e) transesterifying the diester obtained in step a) with the glycidol obtained in step d) to obtain the corresponding dicarboxylic acid diglycidyl ester of formula (I); the invention also relates to a method for producing such thermosetting epoxy resins and to novel resins produced in this way.

Orally administered compositions comprising triacetin are presented that increase the concentration of short chain fatty acids in the gut, namely acetic acid, wherein the compositions comprising triacetin are palatable at desirable concentrations. The triacetin formulations can also be orally administered to a dysbiotic subject to increase short chain fatty acid (SCFA) concentrations in the gut of the subject while substantially avoiding gas production in the subject. Advantageously, administration of contemplated compositions also increases gut barrier integrity and helps restore a balanced gut microbiome.

The utility model provides a glycerol triacetate heating reaction kettle structure, which relates to the technical field of chemical equipment and comprises a reaction kettle component, the reaction kettle component consists of a stirring barrel and a stirring top cover, and the stirring top cover is arranged at a top opening of the stirring barrel. The bottom of the stirring top cover is rotatably connected with an anchor-type stirring frame located in the stirring barrel, and through arrangement of vortex fan blades, in the working process, a second driving motor is started to drive the vortex fan blades to rotate in a heating sleeve, so that materials in the heating sleeve are in a high-speed rotating state, and the materials in the heating sleeve are heated to be in a high-speed rotating state; furthermore, under the action of vortex fan blades, the materials in the heating sleeve generate vortex, so that the water level in the stirring barrel is increased, collision is intense, the stirring effect of the reaction kettle is improved in cooperation with an anchor type stirring frame, and in the rotating process, under the action of a threaded groove, rotation of the materials is accelerated, so that the stirring effect is further improved.

Disclosed is an adhesive, wherein the adhesive comprises a lignin-based binder composition, wherein: - the lignin-based binder composition is prepared from crosslinking agent polymerized with polymerizable substance in the presence of triacetin, - at least 30 weight-% of the polymerizable substance originates from lignin, and - triacetin is used in an amount of 0.1 - 5 weight-% based on the total wet weight of the lignin-based binder composition. Further is disclosed the use of the adhesive and of triacetin. Further is disclosed an insulating wool product.

The invention discloses a smokeless firework material and a preparation method thereof. The smokeless firework material comprises the following components: 60%-75% of nitrocotton, 5%-10% of nitroglycerin, 5%-25% of a plasticizer and 1%-2% of a stabilizing agent. The plasticizer is triacetin, dibutyl phthalate or diethyl phthalate, and the plasticizer is dibutyl phthalate or diethyl phthalate; the stabilizing agent is a methyl centralite agent or an ethyl centralite agent. The method comprises the following steps: weighing the raw materials according to the formula proportion, and preparing a mixed medicine material by utilizing a jet absorption process; then, after the treatment of a water expelling process, preparing into a drug group; and crushing the mixture into particles with the granularity of 80-150 meshes by using a hammer crusher, adding the particles into the smokeless firework powder according to the proportion of 20-40%, and mixing the particles with the oxidizing agent and the metal powder for use. After the smokeless firework powder is added into the smokeless firework material, the smokeless firework material has the characteristics of less smoke during combustion, less residue and the like.

The present invention concerns a triacetin-based bioadditive composition for mineral diesel fuel, diesel–biodiesel blends, and pure biodiesel or B100. The bioadditive composition comprises triacetin as the sole bioadditive component in the range of 5–10% v / v by volume of the fuel. Triacetin is added directly to the fuel at ambient temperature and mixed to obtain a homogeneous fuel–bioadditive composition without the need for catalysts, additional chemical reactions, heating at elevated temperatures, or further refining processes. The resulting composition has a kinematic viscosity that remains within the specification range of each fuel and a sediment content of less than 0.01% m / m after storage for up to 30 days at 15–30°C.The effect of triacetin addition on density, acid number, oxidative stability, cetane number or cetane index, flash point, pour point, and cloud point depends on the type of fuel and the triacetin concentration used. The uniqueness of the present invention lies in the use of triacetin as a single bioadditive component in concentrations tested to produce a homogeneous composition, maintain flow characteristics within the specification range, and limit sediment formation during storage.

The invention discloses a preparation method of high-content glyceryl triacetate, belongs to the technical field of glyceryl triacetate processing, and is used for solving the technical problems that the content, the chromaticity and the conversion rate of glyceryl triacetate prepared by catalysis and the cyclic catalytic stability of a catalyst need to be further improved in the prior art. The invention relates to a preparation method of high-content glyceryl triacetate, which comprises the following steps: mixing butyl titanate, tetraethoxysilane, hydroxymethyl triethoxysilane, sulfonated porous carbon and absolute ethyl alcohol, carrying out ultrasonic dispersion for 30-50 minutes, and raising the temperature of a reaction system to 50-60 DEG C; porous biochar is prepared from corncobs, the porous biochar is sulfonated and activated through a sulfonating agent and then is loaded with Ti-O-Si, then a layer of acetate modifier is modified on the Ti-O-Si, and an esterification catalyst is prepared, so that the content, the chromaticity and the conversion rate of glyceryl triacetate are effectively improved; and the esterification catalyst also has good cyclic catalysis stability.

The present application relates to the technical field of production safety management, and discloses a storage safety management method suitable for triacetin production, which comprises: judging whether the gas concentration in the target area is normal, judging the reason for abnormal gas concentration, constructing an employee habit model, and guiding the employee's taking habits. The storage safety management method suitable for triacetin production judges whether the materials in the area are the same batch of materials stored, compares the calculated material storage time with the upper limit of the allowed storage time, analyzes the employee storage and taking habit model, effectively identifies the materials stored for a long time, constructs the employee storage and taking habit model, and formulates an interference strategy according to the employee habits and the material storage conditions, so as to guide the employees to take the materials in each area more evenly, avoid some materials in certain areas from being ignored and taken for a long time, improve the overall material management and use efficiency, and reduce the risk of local material accumulation or deterioration.

The invention relates to an automatic management system for producing glyceryl triacetate for cigarettes, which is applied to the field of control or regulation systems and comprises an esterification reactor. According to the method, the change data of the actual temperature in the esterification reaction process can be effectively monitored, and the degree and state of the esterification reaction can be accurately judged and controlled by combining the temperature regulation and control effect, so that the optimal management of the temperature and time of the esterification reaction is realized through the intelligent synergistic effect, and the working efficiency is improved. The problems that the quality of esterification reaction products is reduced due to too high temperature, the reaction efficiency is low due to too low temperature, and byproducts are increased due to too long reaction time are solved, so that the production efficiency, the product quality and the esterification purity of the glyceryl triacetate for the cigarettes can be remarkably improved, and the economic benefits of production are finally promoted.

The invention relates to the technical field of fine chemical engineering, and particularly discloses an energy-saving rectification process of glyceryl triacetate. The process comprises the following steps: firstly, carrying out anaerobic closed pretreatment of nitrogen displacement and acetic acid gas phase secondary purging on a whole rectification system, and then carrying out two-stage precision filtration pretreatment on crude ester liquid obtained by catalyzing and esterifying glycerol and glacial acetic acid through solid acid; refining and purification are completed through sectional type reduced pressure pre-stripping, deacidification and concentration under pressure and reduced pressure coupling rectification for adjusting activity coefficients of components in a system through acetic acid in sequence, neutralization washing and drying steps are not set in the whole process, and meanwhile, a whole system material and heat energy closed-loop circulation system is constructed. The process can be used for industrial continuous production of food-grade and tobacco-grade glyceryl triacetate, the product purity and quality stability can be effectively improved, the comprehensive energy consumption in the rectification process is greatly reduced, the generation of high-salt-content organic wastewater is reduced from the source, and the process has good economical efficiency and environmental protection property and meets the development requirements of low-carbon clean production in the fine chemical industry.

A smoking article filter and a smoking article are provided. The smoking article filter includes lyocell tow containing lyocell fibers and a phenol-reducing substance dispersed in the lyocell tow, the phenol-reducing substance including triacetin (TA), and the triacetin content is 0.10 mg to 1.50 mg per mm of the length of the lyocell tow.

The invention relates to the field of adhesives, and discloses a polylactic acid tow adhesive for cigarettes as well as a preparation method and application of the polylactic acid tow adhesive. The polylactic acid tow adhesive for the cigarette comprises a solute and a filler, wherein the solute is one or more of extra white hydrogenated rosin, hydrogenated rosin, polyvinyl acetate, ethylene-vinyl acetate copolymer, cellulose acetate and nitrocellulose; the organic solvent is one or more of glycerol triacetate, L-methyl lactate, L-ethyl lactate, L-butyl lactate, propylene glycol diacetate and ethylene glycol diacetate. The polylactic acid tow adhesive for the cigarette is simple to prepare and good in bonding effect, can be cured at normal temperature to improve the hardness of a filter stick, and does not influence the smoking taste of the polylactic acid filter stick.

The invention relates to the technical field of building materials, and discloses an environment-friendly sand brick and a preparation method thereof.The environment-friendly sand brick is prepared from aggregate and raw materials of a gelling and functional system; the gelling and functional system comprises a sodium silicate solution, active magnesium oxide, glycerol triacetate and calcium formate; the preparation method comprises the following steps: carrying out dry mixing on the aggregate, the active magnesium oxide and the calcium formate, premixing a sodium silicate solution and glycerol triacetate, and then carrying out wet mixing, compression molding and maintenance. Sodium silicate gel is controlled by glycerol triacetate to provide early strength, and calcium formate is utilized to construct a substance transmission channel to drive active magnesium oxide to generate mineralization reaction in the later stage; an expansive product generated by the reaction can fill pores and microcracks, so that the long-term strength and water resistance of the material are remarkably improved, and damage self-repairing is realized; the sand brick prepared by the invention has excellent comprehensive mechanical property, durability and self-repairing function.

The utility model discloses an efficient glycerol triacetate moisture separator, which relates to the technical field of fine chemical engineering, and comprises a heating box, a distillation assembly is arranged in the heating box, the distillation assembly comprises a distillation flask, the top of the distillation flask is connected with a first distillation column, a second distillation column is slidably connected in the first distillation column, and a tower plate is arranged in the second distillation column. A guide pipe is fixedly communicated with the top of the second distillation column, an exhaust pipe is fixedly communicated with one side, close to the guide pipe, of the second distillation column, a condenser is arranged at the bottom of the exhaust pipe, a connecting pipe is fixedly communicated with one end, away from the exhaust pipe, of the condenser, and a heating pipe is arranged on one side, close to the distillation flask, in the heating box; an adjusting assembly is arranged on the side, close to the second distillation column, of the top of the heating box, by arranging the distillation assembly, components with large boiling point difference can be effectively separated through a distillation method, low-boiling-point substances are evaporated and condensed firstly by controlling the temperature, and therefore pure distillate is obtained.

The invention relates to the technical field of production safety management, and discloses a storage safety management method suitable for glycerol triacetate production, which comprises the following steps: judging whether the gas concentration in a target area is normal or not, judging the abnormal reason of the gas concentration, constructing an employee habit model, and guiding the taking habit of employees. According to the storage safety management method suitable for glycerol triacetate production, whether materials in an area are warehoused in the same batch or not is judged, the materials stored for a long time are effectively recognized by calculating the material placement time and comparing the material placement time with the allowable placement time upper limit and combining employee storage and taking habit model analysis, and an employee storage and taking habit model is constructed; and according to the habits of the employees and the material storage condition, an interference strategy is formulated, the employees are guided to take the materials in each area more uniformly, the situation that the materials in some areas are not concerned and taken for a long time is avoided, the overall material management and use efficiency is improved, and the risk that the local materials are overstocked or deteriorated is reduced.

The application discloses a triacetin production process self-adaptive control system based on an energy consumption model, relates to the technical field of industrial automation, and comprises an energy rhythm construction module, a load jump identification module, a superposition sign analysis module, an intervention time point generation module and a time-lag buffer adjustment module; the energy rhythm construction module collects energy consumption change information and working condition rhythm information in a triacetin production running process, aligns and arranges the collected energy consumption change information and working condition rhythm information in time, and forms continuous and consistent energy rhythm records. The application realizes dynamic monitoring of energy input and load change by constructing energy rhythm records and load jump identification, identifies energy accumulation trends in advance, avoids concentrated energy input caused by compensation lag, adjusts time-lag buffer and maintenance, makes energy input rhythm gentle, weakens superposition effect, controls temperature fluctuation, maintains energy dynamic balance, improves process safety and energy consumption utilization efficiency.

The utility model discloses a distillation device for refining glycerol triacetate with a preheating structure, which relates to the field of glycerol triacetate processing and comprises a storage preheating barrel, a conveying pipe is mounted above the storage preheating barrel, a mixing and stirring barrel is mounted at the other end of the conveying pipe, and a fixed embedding plate is mounted above the mixing and stirring barrel. According to the distillation device provided with the preheating structure and used for refining glycerol triacetate, when stirring and mixing operation needs to be conducted on the interior of a mixing and stirring barrel, a driving motor is started firstly to drive a semicircular gear to rotate, and the semicircular gear rotates to drive a fixed transmission rod to slide downwards through a transmission rack; and moreover, an ascending stirring plate fixedly mounted with a fixed transmission rod can stir the glycerol triacetate in the movement process, and the glycerol triacetate firstly enters the storage preheating barrel to be preheated and then enters the mixing and stirring barrel to work, so that uniform mixing of the glycerol triacetate raw materials during processing is ensured.