A distillation and dehydration apparatus for the preparation of triacetin.

Abstract

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.

Description

Technical Field

[0001] This invention relates to the field of distillation and dehydration apparatus, and more particularly to a distillation and dehydration apparatus for the preparation of triacetin. Background Technology

[0002] Triacetin is a colorless, odorless, oily liquid, slightly soluble in water, and readily soluble in alcohols, ethers, and other organic solvents. Its boiling point is typically in the range of 258–260℃. It is non-toxic, non-irritating, and possesses good gelling properties and physiological inertness. It is mainly used as a plasticizer for cellulose acetate filter rods in cigarettes, a fixative in fragrances and flavorings, a non-toxic plasticizer in cosmetics manufacturing, edible rubber-based product manufacturing, special solvents, and food plastic products, and a curing agent for casting resins. Domestically, it is primarily used as an adhesive plasticizer for cigarette filters, and its market demand is increasing year by year, indicating a broad application prospect. Currently, the production of triacetin generally uses glacial acetic acid and glycerol as raw materials, benzene as a dehydrating agent, and concentrated sulfuric acid as a catalyst. The process involves esterification, acylation, and refining. The triacetin prepared by this method has a purity of approximately 99.5%. Distillation dehydration is required during esterification to achieve better esterification results.

[0003] During the distillation process, if the initial distillation concentration is too high, the excessively high concentration of steam during esterification will directly affect the subsequent condensation rate and cause some triacetyl ester raw material to be lost with the steam, resulting in waste. After the cooking is completed, the esterified raw material extracted is not completely discharged and remains in the tower, which will affect the efficiency of the next cooking. In addition, the raw material extracted into the tower will also leave some residue in the pipes and the side walls of the tower. The esterified raw material mist in the steam cannot be utilized, which increases the production cost. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a distillation and dehydration apparatus for the preparation of triacetin, which facilitates the blocking of thickened oils during distillation and avoids rapid loss leading to a smaller amount obtained during distillation. This solves the problems of existing methods 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, resulting in waste; incomplete discharge of the extracted esterified raw material after cooking, leaving it inside the tower, which affects the efficiency of subsequent cooking; and the raw material drawn into the tower also leaving some residue in the pipes and on the side walls of the tower. Furthermore, the esterified raw material mist in the steam cannot be utilized, increasing production costs.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a distillation and dehydration apparatus for the preparation of triacetin esters, comprising a distillation column, a water inlet, an exhaust outlet, a cooking furnace body, and a condenser. The distillation column is movably installed on the top of the cooking furnace body. The exhaust outlet is connected to one side of the top of the distillation column body. The condenser, used for condensing steam, is connected to the exhaust outlet via a pipe and a flange. The water inlet, used for injecting cooking water, is connected to the bottom of one side of the distillation column body. The cooking furnace body is used for cooking triacetin ester raw materials. The distillation column body is installed in a split configuration and fixedly installed via a flange. A storage hopper is movably installed on the top of the cooking furnace body.

[0006] A steam adsorption hood is welded to the middle of the inner wall of the distillation tower. An adsorption spiral blade is movably installed inside the steam adsorption hood. A sliding connecting block is welded to one side of the steam adsorption hood. A driven frame is slidably installed on the surface of the sliding connecting block. A spring is fixedly installed on the top of the sliding connecting block. A scraping mechanism is provided on the top of the driven frame. The scraping mechanism is used to scrape off the raw material adsorbed on the surface of the adsorption spiral blade.

[0007] The top of the distillation column is fixedly equipped with a detectable lifting and rotating drive mechanism. The lifting and rotating drive mechanism is used to lift and change the height of the adsorption spiral plate while detecting the vapor concentration at the bottom of the adsorption spiral plate. It can be used to lift the adsorption spiral plate and rotate the adsorption spiral plate when scraping and cleaning is required.

[0008] The surface of the cooking furnace body is welded with a lifting and material handling mechanism, which is used to lift the distillation tower body and separate it from the cooking furnace body, so as to facilitate the removal of the storage hopper and the quick removal of the cooked raw materials.

[0009] Furthermore, the scraping mechanism includes a second stepper motor, a worm gear, a stabilizing plate, a worm wheel, and a scraper assembly. The second stepper motor is fixedly mounted on the top of the driven frame. The worm gear is fixedly mounted on the output end of the second stepper motor. The stabilizing plate is rotatably mounted on the surface of the worm gear at the end away from the second stepper motor. The worm wheel is located on one side of the worm gear and meshes with the worm gear. The scraper assembly is located on the top of the driven frame near the sliding connecting block.

[0010] Furthermore, the scraper assembly includes an air pipe connector, a mounting bracket, a drive shaft, and a scraper rod. The mounting bracket is welded to the top of the driven bracket near the sliding connecting block. The drive shaft is rotatably mounted inside the mounting bracket, and its top is fixedly mounted to a worm gear. The scraper rod is fixedly mounted on the surface of the drive shaft.

[0011] Furthermore, the detectable lifting and rotating drive mechanism includes an electric push rod, a lifting rod, a rotating shaft, a stepper motor, a vent, and a steam concentration detection component. The electric push rod is fixedly installed at the center of the top of the distillation column. The lifting rod is fixedly installed at the output end of the electric push rod. The rotating shaft is fixedly installed at the output end of the stepper motor. The stepper motor is fixedly installed at the bottom of the lifting rod. The inner side of the adsorption spiral plate is welded and fixed to the bottom of the rotating shaft surface. Two vents are provided, one on the top side and the other on the bottom side of the adsorption spiral plate. The steam concentration detection component is fixedly installed at the bottom of the rotating shaft.

[0012] Furthermore, the steam concentration detection component includes a protective cover, a steam concentration detector, a servo motor, and a sealing plate. The protective cover is fixedly installed at the bottom of the rotating shaft by bolts, the steam concentration detector is fixedly installed to the protective cover by bolts, a servo motor is fixedly installed on one side of the bottom of the protective cover, the servo motor is fixedly installed to the sealing plate through its output end, and the top of the sealing plate is sealed to the bottom of the protective cover.

[0013] Furthermore, the lifting and material handling mechanism includes a cylinder, a support base, a lifting block, and a hopper lifting assembly. The support base is welded to both sides and the rear side of the cooking furnace body. The cylinder is fixedly installed on the top of the support base by bolts. The lifting block is welded to the surface of the distillation tower body and located on top of the cylinder. The output end of the cylinder is fixedly installed to the bottom of the lifting block by bolts.

[0014] Furthermore, the hopper lifting assembly includes a spring, a top plate, a stop block, and a handle. The stop block is welded to the bottom perimeter of the inner wall of the distillation column, the handle is welded to the top perimeter of the inner wall of the storage hopper, the spring is fixedly installed around the top perimeter of the cooking furnace body, and the top plate is welded to the top of the spring.

[0015] Furthermore, the air pipe connector is connected to the top of the driven frame on the side away from the sliding connecting block, and is connected to the scraper rod through a hose. The scraper rod has an air jet hole on the side near the adsorption spiral plate. The air pipe connector is used to connect to an external air source.

[0016] The beneficial effects of this invention are as follows: This invention uses a scraping mechanism to remove the esterified raw materials that are blocked and adsorbed on the surface of the adsorption spiral plate. At the same time, a detectable lifting and rotating drive mechanism detects the concentration of the flowing steam and performs a lifting adsorption operation or a rapid release operation after determining the concentration, thereby improving the working efficiency of distillation. Meanwhile, the lifting and material handling mechanism can quickly lift the distillation section and remove the raw materials as a whole, thereby improving the raw material conversion speed during distillation. Attached Figure Description

[0017] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the half-section three-dimensional structure of the present invention;

[0020] Figure 3 This is a half-section exploded three-dimensional structural diagram of the distillation tower body of the present invention;

[0021] Figure 4 This is a three-dimensional exploded view of the internal structure of the cooking furnace body of the present invention;

[0022] Figure 5 This is an exploded three-dimensional structural diagram of the driven frame of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of the adsorption spiral plate of the present invention;

[0024] Figure 7 This is a control block diagram of the controller of the present invention.

[0025] In the diagram: 1. Distillation tower body; 11. Steam adsorption hood; 2. Water inlet; 3. Exhaust outlet; 4. Cooking furnace body; 41. Placement plate; 42. Controller; 51. Cylinder; 52. Support base; 53. Lifting block; 6. Condenser; 61. Fixed base; 7. Storage hopper; 71. Handle; 72. Stop block; 73. Spring; 74. Top plate; 8. Electric push rod; 81. Lifting rod; 82. Rotating shaft; 83. Adsorption spiral plate; 831. Vent; 84. Stepper motor one; 9. Driven frame; 91. Sliding connecting block; 92. Gas pipe connector; 93. Stepper motor two; 94. Worm gear; 941. Stabilizing plate; 95. Worm wheel; 96. Mounting frame; 961. Drive shaft; 962. Scraper; 97. Spring; 10. Steam concentration detector; 101. Protective cover; 102. Servo motor; 103. Sealing plate. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0027] Please see Figure 1 , Figure 1 This is a three-dimensional structural diagram of the present invention.

[0028] A distillation and dehydration apparatus for preparing triacetin includes a distillation column 1, a water inlet 2, an exhaust port 3, a cooking furnace 4, and a condenser 6. The distillation column 1 is movably installed on the top of the cooking furnace 4. The exhaust port 3 is connected to one side of the top of the distillation column 1. The condenser 6, used for condensing steam, is connected to the exhaust port 3 via a pipe and a flange. The water inlet 2, used for injecting cooking water, is connected to the bottom of one side of the distillation column 1. The cooking furnace 4 is used for cooking triacetin raw materials. The distillation column 1 is installed in a split configuration and fixed by a flange. A storage hopper 7 is movably installed on the top of the cooking furnace 4.

[0029] A steam adsorption hood 11 is welded to the middle of the inner wall of the distillation tower body 1. An adsorption spiral plate 83 is movably installed inside the steam adsorption hood 11. A sliding connecting block 91 is welded to one side of the steam adsorption hood 11. A driven frame 9 is slidably installed on the surface of the sliding connecting block 91. A spring 97 is fixedly installed on the top of the sliding connecting block 91. A scraping mechanism is provided on the top of the driven frame 9. The scraping mechanism is used to scrape off the raw material adsorbed on the surface of the adsorption spiral plate 83.

[0030] A detectable lifting and rotating drive mechanism is fixedly installed on the top of the distillation column 1. The lifting and rotating drive mechanism is used to lift and change the height of the adsorption spiral plate 83 while detecting the vapor concentration at the bottom of the adsorption spiral plate 83. It can be used to lift the adsorption spiral plate 83 and rotate the adsorption spiral plate 83 when scraping and cleaning is required.

[0031] The surface of the cooking furnace body 4 is welded with a lifting and material handling mechanism. The lifting and material handling mechanism is used to lift the distillation tower body 1 and separate it from the cooking furnace body 4, so as to facilitate the quick removal of the cooked raw materials from the storage hopper 7.

[0032] Please see Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , Figure 2 This is a schematic diagram of the half-section three-dimensional structure of the present invention; Figure 3 This is a half-section exploded three-dimensional structural diagram of the distillation tower body of the present invention; Figure 4 This is a three-dimensional exploded view of the internal structure of the cooking furnace body of the present invention; Figure 5 This is an exploded three-dimensional structural diagram of the driven frame of the present invention; Figure 6 This is a three-dimensional structural diagram of the adsorption spiral plate of the present invention; Figure 7 This is a control block diagram of the controller of the present invention.

[0033] The scraping mechanism includes a second stepper motor 93, a worm gear 94, a stabilizing plate 941, a worm wheel 95, and a scraper assembly. The second stepper motor 93 is fixedly mounted on the top of the driven frame 9. The worm gear 94 is fixedly mounted on the output end of the second stepper motor 93. The stabilizing plate 941 is rotatably mounted on the surface of the worm gear 94 at the end away from the second stepper motor 93. The worm wheel 95 is located on one side of the worm gear 94 and meshes with the worm gear 94. The scraper assembly is located on the top of the driven frame 9 near the sliding connecting block 91.

[0034] By starting the stepper motor 93, the worm 94 can be driven to rotate. The rotation of the worm 94 can drive the worm wheel 95 that meshes with it to rotate. When the worm 94 rotates, the stability can be ensured by the limiting of the stabilizing plate 941. At the same time, the rotation of the worm wheel 95 can drive the scraper assembly to perform scraping operation, removing the esters adsorbed on the surface of the adsorption spiral blade 83.

[0035] The scraper assembly includes an air pipe connector 92, a mounting bracket 96, a drive shaft 961, and a scraper 962. The mounting bracket 96 is welded to the top of the driven bracket 9 on the side near the sliding connecting block 91. The drive shaft 961 is rotatably mounted inside the mounting bracket 96, and its top is fixedly mounted to the worm gear 95. The scraper 962 is fixedly mounted on the surface of the drive shaft 961.

[0036] The air pipe connector 92 can easily connect to an external air source. At the same time, the rotation of the worm gear 95 can drive the drive shaft 961 fixed thereto to rotate. The rotation of the drive shaft 961 can drive the scraper 962 to rotate. After the scraper 962 rotates to the position that fits the adsorption spiral plate 83, it can cooperate with the air source to spray away the esterified substances that have fallen off.

[0037] The detectable lifting and rotating drive mechanism includes an electric push rod 8, a lifting rod 81, a rotating shaft 82, a stepper motor 84, a vent 831, and a steam concentration detection component. The electric push rod 8 is fixedly installed at the center of the top of the distillation column 1. The lifting rod 81 is fixed at the output end of the electric push rod 8. The rotating shaft 82 is fixedly installed at the output end of the stepper motor 84. The stepper motor 84 is fixedly installed at the bottom of the lifting rod 81. The inner side of the adsorption spiral plate 83 is welded and fixed to the bottom of the surface of the rotating shaft 82. Two vents 831 are provided, one on the top side and one on the bottom side of the adsorption spiral plate 83, respectively. The steam concentration detection component is fixedly installed at the bottom of the rotating shaft 82.

[0038] The electric push rod 8 can electrically control the lifting rod 81, allowing the lifting rod 81 to adjust its height accordingly. The lifting rod 81 drives the stepper motor 84 at the bottom to adjust its height. Subsequently, the stepper motor 84 can be started to rotate the control rotating shaft 82, ensuring that the rotating shaft 82 keeps in contact with the scraper 962 while scraping the material. During rotation, it will squeeze the scraper 962 downward. At this time, the scraper 962 transmits the squeezing force to the driven frame 9 through the drive shaft 961. The driven frame 9 then compresses the scraper 962 with the surface of the adsorption spiral plate 83 through the elastic force of the spring 97 in the inner cavity, making the scraper 962 fit more tightly with the surface of the adsorption spiral plate 83. Every rotation will cause the scraped esterified material to fall through the vent 831 into the storage hopper 7 at the top of the cooking furnace body 4 for re-distillation, ensuring the efficiency of distillation and dehydration and avoiding the loss of high-concentration raw materials. At the same time, the steam concentration detection component can detect the need for lifting and lowering. When the concentration is too high, the steam descends, causing the adsorption spiral plate 83 to fall until it completely adheres to the inner wall of the steam adsorption hood 11, forming a spiral steam channel. This allows the high-concentration distilled gas to enter the steam channel through the bottom vent 831 and diffuse upwards along the spiral path formed by the steam channel around the adsorption spiral plate 83. During this diffusion process, the gas adheres to the surface of the adsorption spiral plate 83 over a large area, causing the viscous esters to be quickly adsorbed onto the surface of the adsorption spiral plate 83. When the concentration detection falls below the height threshold, the electric push rod 8 is activated again to lift the lifting rod 81, which drives the stepper motor 84 and the rotating shaft 82 to rise. The rotating shaft 82 then lifts the adsorption spiral plate 83, separating it from the steam adsorption hood 11. At this point, the scraping mechanism scrapes off the esters on the surface of the adsorption spiral plate 83 through the vent 831 for re-distillation and dehydration, ensuring the distillation quality of the raw material.

[0039] The steam concentration detection assembly includes a protective cover 101, a steam concentration detector 10, a servo motor 102, and a sealing plate 103. The protective cover 101 is fixedly installed at the bottom of the rotating shaft 82 by bolts. The steam concentration detector 10 is fixedly installed to the protective cover 101 by bolts. The servo motor 102 is fixedly installed on one side of the bottom of the protective cover 101. The servo motor 102 is fixedly installed to the sealing plate 103 through its output end. The top of the sealing plate 103 is sealed to the bottom of the protective cover 101.

[0040] The protective cover 101 can be fixed to the bottom of the rotating shaft 82 with screws. After the steam concentration detector 10 is installed on the inner wall of the protective cover 101, it can easily detect the steam concentration inside the protective cover 101. At the same time, the electronic control of the servo motor 102 can ensure that the amount of flue gas entering the protective cover 101 each time is not too much, so as to avoid incorrect detection results. By intermittently activating the servo motor 102 in conjunction with the sealing plate 103, some of the real-time flue gas is blocked on the outside of the protective cover 101 and the flue gas is detected in batches, which improves the detection accuracy and service life of the steam concentration detector 10. The activation of the servo motor 102 can drive the sealing plate 103 to flip and fit against the bottom of the protective cover 101 to prevent excessive flue gas from interfering with the current concentration detection inside the protective cover 101, thereby improving the detection accuracy.

[0041] The lifting and feeding mechanism includes a cylinder 51, a support base 52, a lifting block 53, and a hopper lifting assembly. The support base 52 is welded to both sides and the rear side of the cooking furnace body 4. The cylinder 51 is fixedly installed on the top of the support base 52 by bolts. The lifting block 53 is welded to the surface of the distillation tower body 1 and located on top of the cylinder 51. The output end of the cylinder 51 is fixedly installed to the bottom of the lifting block 53 by bolts.

[0042] The support base 52 can provide fixed support for the cylinder 51. At the same time, starting the cylinder 51 can drive the lifting block 53 to rise or fall. Since the lifting block 53 is welded to the distillation column body 1, the distillation column body 1 will move along with it during the up and down movement. At the same time, when lifting upward, the hopper lifting component can lift the storage hopper 7 to a position flush with the placement plate 41, which makes it easy for the operator to pull out the storage hopper 7 and improve the material retrieval efficiency.

[0043] The hopper lifting assembly includes a spring 73, a top plate 74, a stop block 72, and a handle 71. The stop block 72 is welded to the bottom perimeter of the inner wall of the distillation column 1, the handle 71 is welded to the top perimeter of the inner wall of the storage hopper 7, the spring 73 is fixedly installed around the top perimeter of the cooking furnace 4, and the top plate 74 is welded to the top of the spring 73.

[0044] The elastic force of spring 73 allows the distillation column 1 to lift the storage hopper 7 to a position higher than the placement plate 41 after it rises. At the same time, the flat surface of the top plate 74 facilitates the sliding and pulling of the handle 71 to pull the storage hopper 7 out of the inner cavity of the cooking furnace body 4, thereby increasing the speed of removing distilled and dehydrated raw materials. Two sets of storage hoppers 7 can be prepared in advance for rapid exchange of materials to be processed. The bottom of the storage hopper 7 is chamfered, which makes it easy to press it down into the cooking chamber at the top of the cooking furnace body 4. Meanwhile, the stop block 72 can prevent the storage hopper 7 from being lifted higher than the distillation column 1, and prevent the bottom of the distillation column 1 from blocking the pulling of the storage hopper 7, making it easy for the operator to quickly pull out the storage hopper 7 for replacement.

[0045] The air pipe connector 92 is connected to the top of the driven frame 9 on the side away from the sliding connecting block 91, and is connected to the scraper 962 through a hose. The scraper 962 has an air jet hole on the side near the adsorption spiral plate 83. The air pipe connector 92 is used to connect to an external air source.

[0046] The air pipe connector 92 can be connected to an external air source through an air pipe, and then connected to the scraper 962 to allow the air jet to blow off the esters on the surface of the scraper 962 and transfer them to the inside of the storage hopper 7 for re-cooking, thus efficiently extracting the raw materials after cooking and dehydration and reducing the loss of raw materials.

[0047] Working principle: When distillation and dehydration are required, the cooking liquid is injected through the water inlet 2. Then, the starting cylinder 51 drives the lifting block 53 to rise. The elastic force of the spring 73 allows the distillation tower 1 to lift the storage hopper 7 to a position higher than the placement plate 41 after rising. At the same time, the flat surface of the top plate 74 facilitates the sliding and pulling of the handle 71 to pull the storage hopper 7 out of the inner cavity of the cooking furnace 4, increasing the speed of removing the distillation and dehydration raw materials. Two sets of storage hoppers 7 can be prepared in advance for quick exchange of materials to be processed. After the raw materials to be processed are put in, the cylinder 51 is started again to descend. The baffle 72 on the inner wall of the distillation tower 1 presses the storage hopper 7 into the inside of the cooking furnace 4 to facilitate the cooking operation. During cooking, the steam concentration detector 10 detects and protects against the operation. To avoid erroneous detection results, the steam concentration inside the protective cover 101 is monitored by intermittently activating the servo motor 102 in conjunction with the sealing plate 103 to partially block the real-time flue gas outside the protective cover 101 for batch detection. This improves the detection accuracy and service life of the steam concentration detector 10. Activating the servo motor 102 causes the sealing plate 103 to rotate and fit against the bottom of the protective cover 101, preventing excessive flue gas from interfering with the current concentration detection inside the protective cover 101 and improving detection accuracy. When the detected concentration is too high, to prevent the loss of oxidized materials from the raw materials, the electric push rod 8 is activated to electrically control the lifting rod 81, allowing the lifting rod 81 to adjust its height accordingly. The lifting rod 81, driven by a stepper motor 84, rotates the shaft 82 and the adsorption spiral plate 83 at high speed. The temperature is adjusted so that the adsorption spiral plate 83 descends until it completely adheres to the inner wall of the steam adsorption hood 11, forming a spiral steam channel. High-concentration distilled gas enters the steam channel through the bottom vent 831 and diffuses upwards along the spiral path formed by the steam channel around the adsorption spiral plate 83. During diffusion, it adheres extensively to the surface of the adsorption spiral plate 83, causing viscous esters to be quickly adsorbed onto the surface of the adsorption spiral plate 83. When the concentration detection falls below the height threshold, the electric push rod 8 is activated again to raise the lifting rod 81, driving the stepper motor 84 and the rotating shaft 82 to rise. The rotating shaft 82 then drives the adsorption spiral plate 83 to rise and separate it from the steam adsorption hood 11. At this time, the stepper motor 93 is activated, driving the worm gear 94 to rotate. The rotation drives the meshing worm gear 95 to rotate. Stability is ensured by the limiting position of the stabilizing plate 941 during worm gear 94 rotation. Simultaneously, the rotation of the worm gear 95 drives the fixed drive shaft 961 to rotate. The rotation of the drive shaft 961 drives the scraper 962 to rotate. After the scraper 962 rotates to the position of contacting the adsorption spiral plate 83, the stepper motor 84 is activated to drive the rotating shaft 82 and the adsorption spiral plate 83 to rotate. The rotating adsorption spiral plate 83 scrapes off the esterified substances adsorbed on its surface through the contacting scraper 962. Furthermore, gas is ejected from the air jet nozzle through the air pipe connector 92 of the external air source to blow off the esterified substances on the surface of the scraper 962 and transfer them to the inside of the storage hopper 7 for further cooking, efficiently extracting the raw material after cooking and dehydration.The esterified material on the surface of the adsorption spiral plate 83 is scraped off through the vent 831 and then distilled and dehydrated to ensure the distillation quality of the raw material. After processing, the cylinder 51 can be restarted to lift and remove the storage hopper 7 for rapid replacement of the raw material.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A distillation and dehydration apparatus for the preparation of triacetin, comprising a distillation column (1), a water inlet (2), an exhaust outlet (3), a cooking furnace (4), and a condenser (6), characterized in that, The distillation tower body (1) is movably installed on the top of the cooking furnace body (4). The exhaust port (3) is connected to one side of the top of the distillation tower body (1). The condenser (6) for condensing steam is connected to the exhaust port (3) through a pipe and a flange. The water inlet (2) for injecting cooking water is connected to the bottom of one side of the distillation tower body (1). The cooking furnace body (4) is used for cooking triglyceride raw materials. The distillation tower body (1) is installed in a split manner and fixed by a flange. The top of the cooking furnace body (4) is movably installed with a storage hopper (7). A steam adsorption hood (11) is welded to the middle of the inner wall of the distillation tower body (1). An adsorption spiral plate (83) is movably installed inside the steam adsorption hood (11). A sliding connecting block (91) is welded to one side of the steam adsorption hood (11). A driven frame (9) is slidably installed on the surface of the sliding connecting block (91). A spring (97) is fixedly installed on the top of the sliding connecting block (91). A scraping mechanism is provided on the top of the driven frame (9). The scraping mechanism is used to scrape off the raw material adsorbed on the surface of the adsorption spiral plate (83). The top of the distillation tower body (1) is fixedly equipped with a detectable lifting and rotating drive mechanism. The lifting and rotating drive mechanism is used to lift and change the height of the adsorption spiral plate (83) while detecting the vapor concentration at the bottom of the adsorption spiral plate (83), and to lift the adsorption spiral plate (83) in conjunction with the lifting of the adsorption spiral plate (83). When scraping and cleaning is required, the adsorption spiral plate (83) is rotated. The surface of the cooking furnace body (4) is welded with a lifting and material handling mechanism. The lifting and material handling mechanism is used to lift the distillation tower body (1) and the cooking furnace body (4) to separate them, so as to facilitate the removal of the storage hopper (7) and the quick removal of the cooked raw materials.

2. The distillation and dehydration apparatus for preparing triacetin according to claim 1, characterized in that: The scraping mechanism includes a second stepper motor (93), a worm (94), a stabilizing plate (941), a worm wheel (95), and a scraper assembly. The second stepper motor (93) is fixedly mounted on the top of the driven frame (9). The worm (94) is fixedly mounted on the output end of the second stepper motor (93). The stabilizing plate (941) is rotatably mounted on the surface of the worm (94) away from the second stepper motor (93). The worm wheel (95) is located on one side of the worm (94) and meshes with the worm (94). The scraper assembly is located on the top of the driven frame (9) near the sliding connecting block (91).

3. The distillation and dehydration apparatus for preparing triacetin according to claim 2, characterized in that: The scraper assembly includes an air pipe connector (92), a mounting bracket (96), a drive shaft (961), and a scraper rod (962). The mounting bracket (96) is welded to the top of the driven bracket (9) near the sliding connecting block (91). The drive shaft (961) is rotatably mounted inside the mounting bracket (96) and its top is fixedly mounted to the worm gear (95). The scraper rod (962) is fixedly mounted on the surface of the drive shaft (961).

4. The distillation and dehydration apparatus for preparing triacetin according to claim 1, characterized in that: The detectable lifting and rotating drive mechanism includes an electric push rod (8), a lifting rod (81), a rotating shaft (82), a stepper motor (84), a vent (831), and a steam concentration detection component. The electric push rod (8) is fixedly installed at the center of the top of the distillation column (1). The lifting rod (81) is fixed at the output end of the electric push rod (8). The rotating shaft (82) is fixedly installed at the output end of the stepper motor (84). The stepper motor (84) is fixedly installed at the bottom of the lifting rod (81). The inner side of the adsorption spiral plate (83) is welded and fixed to the bottom of the surface of the rotating shaft (82). Two vents (831) are opened and are respectively opened on the top side and the bottom side of the adsorption spiral plate (83). The steam concentration detection component is fixedly installed at the bottom of the rotating shaft (82).

5. The distillation and dehydration apparatus for preparing triacetin according to claim 4, characterized in that: The steam concentration detection assembly has a protective cover (101), a steam concentration detector (10), a servo motor (102), and a sealing plate (103). The protective cover (101) is fixedly installed at the bottom of the rotating shaft (82) by bolts. The steam concentration detector (10) is fixedly installed to the protective cover (101) by bolts. The servo motor (102) is fixedly installed on one side of the bottom of the protective cover (101). The servo motor (102) is fixedly installed to the sealing plate (103) through its output end. The top of the sealing plate (103) is sealed to the bottom of the protective cover (101).

6. The distillation and dehydration apparatus for preparing triacetin according to claim 1, characterized in that: The lifting and feeding mechanism includes a cylinder (51), a support base (52), a lifting block (53), and a hopper lifting assembly. The support base (52) is welded to both sides and the rear side of the cooking furnace body (4). The cylinder (51) is fixedly installed on the top of the support base (52) by bolts. The lifting block (53) is welded to the surface of the distillation tower body (1) and located on the top of the cylinder (51). The output end of the cylinder (51) is fixedly installed to the bottom of the lifting block (53) by bolts.

7. The distillation and dehydration apparatus for preparing triacetin according to claim 6, characterized in that: The hopper lifting assembly includes a second spring (73), a top plate (74), a stop block (72), and a handle (71). The stop block (72) is welded to the bottom of the inner wall of the distillation tower body (1), the handle (71) is welded to the top of the inner wall of the storage hopper (7), the second spring (73) is fixedly installed around the top of the cooking furnace body (4), and the top plate (74) is welded to the top of the second spring (73).

8. The distillation and dehydration apparatus for preparing triacetin according to claim 3, characterized in that: The air pipe connector (92) is connected to the top of the driven frame (9) on the side away from the sliding connecting block (91), and is connected to the scraper (962) through a hose. The scraper (962) has an air jet hole on the side near the adsorption spiral plate (83) inside. The air pipe connector (92) is used to connect to an external air source.

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