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CN-117398702-B - Distillation dewatering device is used in triacetin preparation

CN117398702BCN 117398702 BCN117398702 BCN 117398702BCN-117398702-B

Abstract

The invention provides a distillation dehydration device for preparing triacetin, which comprises a distillation tower body, a water filling port, an exhaust port, a cooking furnace body and a condenser, wherein the distillation tower body is movably arranged at the top of the cooking furnace body, and the exhaust port is communicated with one side of the top of the distillation tower body. The invention can be convenient for blocking thickened grease during distillation, can avoid less distillation obtained parts caused by high loss speed, and solves the problems that the subsequent condensation speed is influenced and the waste is caused by the fact that the glycerol triacetate raw material is wasted along with the steam loss part due to direct condensation of the steam with the excessive concentration in the existing distillation concentration excessively high esterification process, the once-again cooking efficiency is influenced due to the fact that the extracted esterified raw material is not completely discharged in a tower after the cooking is finished, part of raw material sucked into the tower is remained in a pipeline and the side wall of the tower body, and the production cost is increased due to the fact that the esterified raw material mist in the steam cannot be utilized.

Inventors

  • GUO WENPENG
  • MENG QINGBIN

Assignees

  • 山东华煜新材料有限责任公司

Dates

Publication Date
20260505
Application Date
20231106

Claims (8)

  1. 1. The utility model provides a triacetin preparation is with distillation dewatering device, includes distillation column body (1), water injection port (2), gas vent (3), cooking furnace body (4) and condenser (6), its characterized in that, distillation column body (1) movable mounting is in the top of cooking furnace body (4), gas vent (3) intercommunication is in distillation column body (1) top one side condenser (6) for condensing steam are linked together with gas vent (3) through pipeline cooperation ring flange, be used for injecting into the water injection port (2) of cooking water are linked together in the bottom of distillation column body (1) one side, cooking furnace body (4) are used for cooking the triglyceride raw materials, distillation column body (1) adopts split type installation and through ring flange fixed mounting, the top movable mounting of cooking furnace body (4) has storage hopper (7); The steam adsorption device is characterized in that a steam adsorption cover (11) is welded in the middle of the inner wall of the distillation tower body (1), an adsorption spiral sheet (83) is movably mounted in the steam adsorption cover (11), a sliding connecting block (91) is welded on one side of the steam adsorption cover (11), a driven frame (9) is slidably mounted on the surface of the sliding connecting block (91), a first spring (97) is fixedly mounted on the top of the sliding connecting block (91), and a scraping mechanism is arranged at the top of the driven frame (9) and used for scraping raw materials adsorbed on the surface of the adsorption spiral sheet (83); the top of the distillation tower body (1) is fixedly provided with a detectable jacking rotary driving mechanism, the jacking rotary driving mechanism is used for jacking to change the height of the adsorption spiral sheet (83) and detect the concentration of steam at the bottom of the adsorption spiral sheet (83), the jacking adsorption spiral sheet (83) is matched, and the adsorption spiral sheet (83) is rotated when scraping and cleaning are needed; The surface welding of cooking furnace body (4) has a jack-up feeding mechanism, jack-up feeding mechanism is used for jack-up distillation tower body (1) and separation of cooking furnace body (4), is convenient for take out storage hopper (7) and takes out the raw materials after the boiling fast.
  2. 2. The distillation dehydration device for preparing triacetin according to claim 1, wherein the scraping mechanism comprises a second stepping motor (93), a worm (94), a stabilizing plate (941), a worm wheel (95) and a scraping assembly, the second stepping motor (93) is fixedly arranged at the top of the driven frame (9), the worm (94) is fixedly arranged at the output end of the second stepping motor (93), the stabilizing plate (941) is rotatably arranged at one end, far away from the second stepping motor (93), of the surface of the worm (94), the worm wheel (95) is arranged at one side of the worm (94) and meshed with the worm (94), and the scraping assembly is arranged at the top of one side, close to the sliding connecting block (91), of the driven frame (9).
  3. 3. The distillation dehydration device for preparing triacetin according to claim 2, wherein the scraping strip assembly comprises an air pipe joint (92), a mounting frame (96), a driving shaft (961) and a scraping rod (962), the mounting frame (96) is welded at the top of one side of a driven frame (9) close to a sliding connecting block (91), the driving shaft (961) is rotatably arranged in the mounting frame (96), the top is fixedly arranged with a worm wheel (95), and the scraping rod (962) is fixedly arranged on the surface of the driving shaft (961).
  4. 4. The distillation dehydration device for preparing triacetin according to claim 1, wherein the detectable jacking rotation driving mechanism comprises an electric push rod (8), a lifting rod (81), a rotation shaft (82), a first stepping motor (84), an air vent (831) and a steam concentration detection component, wherein the electric push rod (8) is fixedly arranged at the center of the top of a distillation tower body (1), the lifting rod (81) is fixed at the output end of the electric push rod (8), the rotation shaft (82) is fixedly arranged at the output end of the first stepping motor (84), the first stepping motor (84) is fixedly arranged at the bottom of the lifting rod (81), the inner side of the adsorption spiral piece (83) is fixedly welded with the bottom of the surface of the rotation shaft (82), the air vent (831) is respectively arranged at one side of the top of the adsorption spiral piece (83) and one side of the bottom, and the steam concentration detection component is fixedly arranged at the bottom of the rotation shaft (82).
  5. 5. The distillation dehydration device for preparing triacetin according to claim 4, wherein the steam concentration detection assembly is provided with a protective cover (101), a steam concentration detector (10), a steering engine (102) and a sealing plate (103), the protective cover (101) is fixedly arranged at the bottom of the rotating shaft (82) through bolts, the steam concentration detector (10) is fixedly arranged with the protective cover (101) through bolts, the steering engine (102) is fixedly arranged at one side of the bottom of the protective cover (101), the steering engine (102) is fixedly arranged with the sealing plate (103) through an output end, and the top of the sealing plate (103) is matched with the bottom of the protective cover (101) in a sealing mode.
  6. 6. The distillation dehydration device for preparing triacetin according to claim 1, wherein the jacking and taking mechanism comprises an air cylinder (51), a supporting seat (52), a jacking block (53) and a hopper jacking assembly, the supporting seat (52) is welded on two sides and the rear side of a cooking furnace body (4), the air cylinder (51) is fixedly arranged at the top of the supporting seat (52) through bolts, the jacking block (53) is welded on the surface of the distillation tower body (1) and is positioned at the top of the air cylinder (51), and the output end of the air cylinder (51) and the bottom of the jacking block (53) are fixedly arranged through bolts.
  7. 7. The distillation dehydration device for preparing triacetin according to claim 6, wherein the hopper lifting assembly comprises a second spring (73), a top piece (74), a stop block (72) and a handle (71), the stop block (72) is welded on the periphery of the bottom of the inner wall of the distillation tower body (1), the handle (71) is welded on the periphery of the inner wall of the storage hopper (7), the second spring (73) is fixedly installed on the periphery of the top of the cooking furnace body (4), and the top piece (74) is welded on the top of the second spring (73).
  8. 8. The distillation dehydration device for preparing triacetin according to claim 3, wherein the air pipe joint (92) is communicated with the top of one side of the driven frame (9) far away from the sliding connecting block (91) and is communicated with the scraping rod (962) through a hose, an air injection hole is formed in one side, close to the adsorption spiral piece (83), of the scraping rod (962), and the air pipe joint (92) is used for being connected with an external air source.

Description

Distillation dewatering device is used in triacetin preparation Technical Field The invention relates to the technical field of distillation dehydration devices, in particular to a distillation dehydration device for preparing triacetin. Background The glyceryl triacetate is prepared into colorless odorless oily liquid, is slightly soluble in water, is easily soluble in alcohol, ether and other organic solvents, has a boiling point generally within a range of 258-260 ℃, is nontoxic and nonirritating, has good gelation effect and physiological inertia, and is mainly used as a plasticizer of acetate fiber tip rods for cigarette filters, a fixing agent of spices and essence, a nontoxic plasticizer of special solvents and food plastic products, a curing agent for casting resins and the like. The adhesive is mainly used as an adhesive plasticizer for cigarette filters in China, the market demand of the adhesive is increased year by year, and the adhesive has a wide application prospect. At present, the production of the glyceryl triacetate is generally carried out by taking glacial acetic acid and glycerin as raw materials, benzene and the like as water-carrying agents, and concentrated sulfuric acid as catalysts, and carrying out the procedures of esterification, acylation, refining and the like. In the distillation process, because the initial distillation concentration is too high, the excessive high concentration steam is directly condensed in the esterification process, so that the subsequent condensation speed is influenced, the triacetin raw material is wasted along with the steam loss, the esterified raw material extracted after the completion of the boiling is not discharged thoroughly and left in the tower, the further boiling efficiency is influenced, the raw material pumped into the interior of the tower is also led to be partially remained in the pipeline and the side wall of the tower body, and the esterified raw material mist in the steam cannot be utilized, so that the production cost is increased. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide the distillation dehydration device for preparing the triacetyl glycerine, which can be convenient for blocking thickened grease during distillation, can avoid less parts obtained by distillation caused by high loss speed, and solves the problems that the subsequent condensation speed is influenced and the triacetyl glycerine raw material is wasted along with the part of steam loss caused by direct condensation of the steam with the excessive concentration in the existing distillation concentration in the esterification process, the once-again cooking efficiency is influenced by incomplete discharge of the esterified raw material extracted after the cooking is finished, the raw material pumped into the interior of the tower is partially remained in a pipeline and the side wall of the tower body, and the production cost is increased because the esterified raw material mist in the steam cannot be utilized. The technical scheme is that the distillation dehydration device for preparing the triacetyl glyceride comprises a distillation tower body, a water filling port, an exhaust port, a cooking furnace body and a condenser, wherein the distillation tower body is movably arranged at the top of the cooking furnace body, the exhaust port is communicated with one side of the top of the distillation tower body, the condenser for condensing steam is communicated with the exhaust port through a pipeline matched with a flange, the water filling port for filling cooking water is communicated with the bottom of one side of the distillation tower body, the cooking furnace body is used for cooking a triacetyl glyceride raw material, the distillation tower body is arranged in a split mode and is fixedly arranged through the flange, and a storage hopper is movably arranged at the top of the cooking furnace body; The steam adsorption device comprises a distillation tower body, wherein a steam adsorption cover is welded in the middle of the inner wall of the distillation tower body, an adsorption spiral sheet is movably arranged in the steam adsorption cover, a sliding connecting block is welded on one side of the steam adsorption cover, a driven frame is slidably arranged on the surface of the sliding connecting block, a spring is fixedly arranged at the top of the sliding connecting block, a scraping mechanism is arranged at the top of the driven frame and is used for scraping raw materials adsorbed on the surface of the adsorption spiral sheet; The top of the distillation tower body is fixedly provided with a detectable jacking rotary driving mechanism, the jacking rotary driving mechanism is used for jacking to change the height of the adsorption spiral sheet, detecting the concentration of steam at the bottom of the adsorption spiral sheet, and matching with the jacking adsorption spiral sheet, and rotating the adsor