CN119327399A - Triacetin production and processing system, esterification kettle and esterification method - Google Patents
Triacetin production and processing system, esterification kettle and esterification method Download PDFInfo
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- CN119327399A CN119327399A CN202411881694.4A CN202411881694A CN119327399A CN 119327399 A CN119327399 A CN 119327399A CN 202411881694 A CN202411881694 A CN 202411881694A CN 119327399 A CN119327399 A CN 119327399A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
- B01D1/222—In rotating vessels; vessels with movable parts
- B01D1/223—In rotating vessels; vessels with movable parts containing a rotor
- B01D1/225—In rotating vessels; vessels with movable parts containing a rotor with blades or scrapers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/52—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/02—Esters of acyclic saturated monocarboxylic acids having the carboxyl group bound to an acyclic carbon atom or to hydrogen
- C07C69/12—Acetic acid esters
- C07C69/18—Acetic acid esters of trihydroxylic compounds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
本发明属于涉及酯化系统技术领域，且公开了三乙酸甘油酯生产加工系统、酯化釜及酯化方法，包括酯化釜、脱水釜、预脱酸釜、酰化釜和高脱酸釜，酯化釜和脱水釜之间连接有输送管，输送管内部连接有输送泵，通过输送泵将酯化釜内的物质输送至脱水釜内部，酯化釜上端固定连接有若干个进料管，进料管和外界供料设备相连，酯化釜内部转动连接有搅拌桨叶，通过搅拌桨叶的转动实现对酯化釜内部酯化反应的加速，脱水釜内部置有脱水装置，脱水装置包括多级脱水结构，多级脱水结构上下首尾相连，脱水结构包括和脱水釜同轴设置的加热筒，加热筒内同轴转动连接有旋转筒，旋转筒上开设有若干透水孔，加热筒内壁同轴连接有高温环形板，且实用性强。
The invention belongs to the technical field of esterification system, and discloses a triacetin production and processing system, an esterification kettle and an esterification method. The system comprises an esterification kettle, a dehydration kettle, a pre-deacidification kettle, an acylation kettle and a high-deacidification kettle. A delivery pipe is connected between the esterification kettle and the dehydration kettle, a delivery pump is connected inside the delivery pipe, and substances in the esterification kettle are delivered to the dehydration kettle through the delivery pump. A plurality of feed pipes are fixedly connected to the upper end of the esterification kettle, and the feed pipes are connected to external feeding equipment. A stirring blade is rotatably connected inside the esterification kettle, and the esterification reaction inside the esterification kettle is accelerated by the rotation of the stirring blade. A dehydration device is arranged inside the dehydration kettle, and the dehydration device comprises a multi-stage dehydration structure, which is connected end to end from top to bottom. The dehydration structure comprises a heating cylinder coaxially arranged with the dehydration kettle, a rotating cylinder is coaxially rotatably connected inside the heating cylinder, a plurality of water permeable holes are opened on the rotating cylinder, and a high-temperature annular plate is coaxially connected to the inner wall of the heating cylinder, and the dehydration device has strong practicality.
Description
Technical Field
The invention relates to the technical field of esterification systems, in particular to a triacetin production and processing system, an esterification kettle and an esterification method.
Background
The glyceryl triacetate is an organic compound, is colorless oily liquid, has weak fruit fragrance and sweet taste, has bitter taste at low concentration, and can be used in daily chemical essence formulation, and mainly used as perfume fixative. The glyceryl triacetate is an intermediate of a plurality of fine chemical products, has consumption of more than ten thousand tons in China, and is a very attractive chemical raw material. One of the factors affecting the quality of the finished glyceryl triacetate is the moisture content.
The Chinese patent with the application number of CN202410440378.7 discloses a dehydration device for the production of triacetyl glyceride, by installing a screw rod lifter, a lifting screw rod, a conductive coil and other devices, the conductive coil is used for heating a dehydration cylinder, and as the conductive coil is electrified to generate a magnetic field, a gadolinium metal plate enters the magnetic field and is magnetized to generate heat, so that the temperature rising rate of the dehydration cylinder is faster, and meanwhile, the phenomenon that the center temperature of the dehydration cylinder is not high, so that the temperature of the inner wall of the dehydration cylinder is not high, the triacetyl glyceride is heated unevenly, and the dehydration effect is poor is avoided; the evaporation rod rotates along with the rotary table, so that liquid can be uniformly distributed and heated, the formation of a high-temperature area or a cooling area is avoided, the stability of the evaporation process is kept, the contact area of the glyceryl triacetate and the inner wall of the dehydration barrel can be increased, the heat transfer effect is improved, the evaporation rate is accelerated, the devices such as an atomization rotary nozzle and a feeding pipe are arranged, the atomization rotary nozzle can atomize the glyceryl triacetate into tiny liquid drops and uniformly distribute the tiny liquid drops in the dehydration barrel, the surface area of the liquid is increased, the evaporation rate is improved, the heated gas is introduced into the dehydration barrel through the devices such as an air compressor, a vortex tube and a hot air pipe, the internal temperature of the dehydration barrel is increased, the evaporation rate is accelerated, the pressurized gas pushes driving blades to rotate, no electric driving is needed, the energy loss in the electric energy conversion process is avoided, the gas is discharged upwards from an air outlet hole of the rotary table, the gas is collided with molecules in the liquid, volatile components in the liquid are promoted to be rapidly evaporated, the gas is pushed to move upwards from the bottom, the volatile components in the liquid are diffused, and the volatile components in the liquid are mixed upwards, the method is favorable for uniformly distributing volatile components and improving the uniformity and stability of evaporation.
The application discloses a medical-grade glyceryl triacetate reaction kettle, which is characterized in that a first motor drives three stirring shafts to rotate simultaneously, when the glyceryl triacetate raw materials in the reaction kettle body are stirred, the glyceryl triacetate raw materials can be subjected to stirring forces from different directions, the stirring of the glyceryl triacetate is more uniform, the stirring efficiency is improved, and the temperature of the glyceryl triacetate with different depths in the reaction kettle body can be measured through the liftable design of a temperature sensor in the reaction kettle body, so that after receiving signals sent by the temperature sensor, the uniformity of the stirring of the glyceryl triacetate is judged according to the received temperature information, and the use convenience of the device is improved. However, the following problems still exist in practical applications, in particular:
1. Most of the existing preparation processes of the glyceryl triacetate adopt layered diversion effect to remove water, the water removal effect is poor, the accuracy of the glyceryl triacetate is not ensured, and the water is discharged through diversion of the water body, so that the efficiency is low;
2. in the esterification reaction process, feeding and discharging cannot be effectively unified, independent control is needed, the feeding and discharging can influence the reflecting effect, meanwhile, the incomplete reaction problem can be caused, resources are wasted, and the coordination of feeding and discharging cannot be effectively realized;
3. When the esterified substance is dehydrated, the esterified substance is often directly heated, and the dehydrated substance is dehydrated after steam is generated, so that the efficiency is low, the moisture cannot be evaporated sufficiently, the evaporation efficiency is low, and the dehydration precision cannot be effectively ensured.
Accordingly, the present invention provides a glyceryl triacetate production and processing system, an esterification tank, and an esterification method to solve the above-described problems.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides a glyceryl triacetate production and processing system, an esterification kettle and an esterification method, which effectively solve the problems of unreachable dehydration precision or low dehydration efficiency caused by poor coordination control of feeding and discharging in the esterification kettle and poor dehydration effect.
The invention comprises an esterification kettle, a dehydration kettle, a pre-deacidification kettle, an acylation kettle and a high-deacidification kettle, wherein a conveying pipe is connected between the esterification kettle and the dehydration kettle, a conveying pump is connected inside the conveying pipe, and substances in the esterification kettle are conveyed into the dehydration kettle through the conveying pump;
the upper end of the esterification kettle is fixedly connected with a plurality of feeding pipes, the feeding pipes are connected with external feeding equipment, stirring paddles are rotatably connected in the esterification kettle, and the acceleration of the esterification reaction in the esterification kettle is realized through the rotation of the stirring paddles;
The dehydration kettle is internally provided with a dehydration device, the dehydration device comprises a multi-stage dehydration structure, the multi-stage dehydration structure is connected end to end from top to bottom, the dehydration structure comprises a heating cylinder coaxially arranged with the dehydration kettle, a rotating cylinder is coaxially connected in the heating cylinder in a rotating way, a plurality of water permeable holes are formed in the rotating cylinder, the inner wall of the heating cylinder is coaxially connected with a high-temperature annular plate, and the high-temperature annular plate is connected with an electric heating device arranged in the heating cylinder;
The lower end of the heating cylinder is in a round table shape, the lower end of the heating cylinder at the upper side is arranged in the rotary cylinder at the lower side, the dehydrated material is conveyed into the rotary cylinder at the next stage, and the lower end of the heating cylinder at the lowest end is connected with an external storage device;
The upper end of the heating cylinder is provided with a plurality of exhaust holes, the exhaust holes are communicated with the inside of the dehydration kettle, and the inside of the dehydration kettle is connected with an external negative pressure device, so that the air pressure in the dehydration kettle is lower than the air pressure in the heating cylinder;
The lower end of the dehydration kettle is fixedly communicated with a liquid discharge pipe, and the liquid discharge pipe is connected with an external liquid collecting barrel.
Preferably, the rotary drums are coaxially and fixedly connected, the uppermost rotary drum is coaxially and fixedly connected with a rotary rod, the upper end of the rotary rod is coaxially and fixedly connected with a middle rod sleeve, the middle rod sleeve is connected with a driving shaft connected inside the dehydration kettle through a chain transmission mechanism, and the driving shaft is connected with a driving motor connected to the upper end of the dehydration kettle.
Preferably, the upper end of the middle rod sleeve is rotationally connected with a liquid inlet pipe, the liquid inlet pipe is communicated with the conveying pipe, the lower end of the middle rod sleeve is provided with a plurality of liquid permeable holes, and liquid is supplied to the inside of the rotary cylinder at the uppermost end through the liquid inlet pipe, the middle rod sleeve and the liquid permeable holes.
Preferably, the peripheral coaxial fixed cover of middle pole cover be equipped with synchronous rotating frame, synchronous rotating frame on fixedly connected with a plurality of rotation scrapers, rotation scrapers with the inner wall of dehydration cauldron laminate mutually, the inside bottom fixedly connected with wedge ring of dehydration cauldron, through the wedge change realize the direction to liquid.
Preferably, the side wall of the heating cylinder is internally provided with an annular ventilation bin, the outer wall of the heating cylinder is provided with exhaust pores communicated with the annular ventilation bin, and the annular ventilation bin is connected with an external air supply device.
Preferably, the upper side of the inside of the esterification kettle is fixedly connected with a conical flow guiding sleeve, the lower end of the conical flow guiding sleeve is coaxially and fixedly connected with a discharging pipe, the lower end of the esterification kettle is fixedly communicated with a discharging pipe, and the discharging pipe is communicated with the conveying pipe;
The upper part of the discharging pipe is coaxially connected with a lower sealing plug in an up-down sliding way, the upper part of the discharging pipe is coaxially connected with an upper sleeve in an up-down sliding way, the lower sealing plug is coaxially connected with a lower sleeve, the upper sleeve and the lower sleeve are coaxially and rotatably connected with a lifting shaft rod which is rotatably connected with the axis of the esterification kettle, the stirring blade is coaxially and fixedly connected with the lifting shaft rod, and the stirring blade is synchronously rotated by the rotation of the lifting shaft rod;
The upper end of the lifting shaft rod is fixedly connected with a lifting plate, the lifting plate is in threaded connection with an adjusting screw rod which is rotatably connected to the inside of the esterification kettle, and the adjusting screw rod is connected with an adjusting motor which is connected to the esterification kettle;
The lifting shaft rod is connected with a driving rod in the esterification kettle in a sliding way up and down, and the driving rod is connected with a driving motor on the esterification kettle in a rotating way.
Preferably, the upper sealing plug is connected with the upper sleeve in an up-down sliding way, the lower end of the upper sleeve is coaxially and fixedly connected with an upper supporting ring, and the upper supporting ring is connected with the upper sealing plug through a spring;
the upper end of the lower sleeve is coaxially and fixedly connected with a lower supporting ring, and the lower supporting ring is connected with the lower sealing plug through a spring.
The esterification method for the production of the glyceryl triacetate comprises the following specific steps:
in an initial state, the blanking pipe is opened and the discharging pipe is closed;
firstly, placing raw materials into the esterification kettle through a feeding pipe;
Step two, the raw materials entering the esterification kettle rapidly undergo esterification reaction under the stirring action of the stirring blade, so as to obtain corresponding esterified substances;
step three, conveying the esterified substance after esterification to the inside of the dehydration kettle through the conveying pump, and then conveying the esterified substance to the inside of the rotary cylinder at the uppermost end;
Step four, the esterified substance is subjected to multistage dehydration reaction, so that the water vapor is separated and liquefied and then discharged to the outside, and the dehydrated esterified substance enters the subsequent process through the liquid discharge pipe;
And fifthly, sequentially carrying out pre-deacidification, acylation and high deacidification treatment on the dehydrated esterified substance.
The invention improves the existing esterification system of the glyceryl triacetate, and has the following beneficial effects:
1. The structure of the heating cylinder, the rotary cylinder, the water permeable hole, the high-temperature annular plate, the exhaust hole and the like effectively solves the problem of efficiently dehydrating the esterified substance, and the problem of effectively removing the water in the esterified substance can be solved by sprinkling the esterified substance on the high-temperature annular plate, so that the high-temperature contact area is increased;
2. by arranging the structures of the annular ventilation bin, the exhaust system, the synchronous rotating frame, the rotating scraping plate and the like, the problems that high-temperature steam is guided, the high-temperature steam is prevented from being contacted with the outer wall surface of the heating cylinder to be liquefied, the temperature of the heating cylinder is reduced, and the water vapor adhered to the liquefied high-temperature steam is cleaned and collected are effectively solved;
3. Through setting up toper water conservancy diversion cover, unloading pipe, row material pipe, go up the sealing plug, down the sealing plug, go up sleeve pipe, lifting shaft pole, lifter plate, adjusting screw and actuating lever isotructure, solved effectively and to throwing material and row material process to the esterification kettle, coordinate the switching to unloading pipe, row material pipe's start and stop, guarantee that unloading pipe and row material pipe are single to be opened, guarantee can carry out the esterification reaction completely, improve the utilization ratio of raw materials.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
FIG. 2 is a schematic diagram of the internal structure of the dehydration kettle of the present invention.
FIG. 3 is a schematic view of the internal structure of the heating cylinder of the invention.
FIG. 4 is a schematic diagram of the internal structure of the esterification reactor of the present invention.
Fig. 5 is a schematic diagram of a lifting shaft and a connecting member thereof according to the present invention.
Fig. 6 is a schematic diagram of a lifting shaft and a connecting piece thereof according to the present invention.
Fig. 7 is an enlarged schematic view of a portion of fig. 6a in accordance with the present invention.
Fig. 8 is an enlarged partial schematic view of fig. 6B in accordance with the present invention.
The device comprises the following components of a reference numeral 1, an esterification kettle, 2, a dehydration kettle, 3, a conveying pipe, 4, a feeding pipe, 6, a heating cylinder, 7, a rotary cylinder, 8, a water permeable hole, 9, a high-temperature annular plate, 10, an exhaust hole, 11, a liquid discharge pipe, 12, a rotating rod, 13, an intermediate rod sleeve, 15, a liquid inlet pipe, 16, a liquid permeable hole, 17, a synchronous rotating frame, 18, a rotating scraper, 19, a wedge-shaped ring, 20, an annular ventilation bin, 21, an exhaust pore, 22, a conical guide sleeve, 23, a blanking pipe, 24, a liquid discharge pipe, 25, an upper sealing plug, 26, an upper casing, 27, a lower sealing plug, 28, a lower casing, 29, a lifting shaft rod, 31, a lifting plate, 32, an adjusting screw, 33, a driving rod, 34, an upper supporting ring and 35, and a lower supporting ring.
Detailed Description
The foregoing and other features, aspects and advantages of the present invention will become more apparent from the following detailed description of the embodiments with reference to the accompanying drawings, 1-8. The following embodiments are described in detail with reference to the drawings.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The invention relates to an esterification reaction kettle, which comprises an esterification kettle 1, a dehydration kettle 2, a pre-deacidification kettle, an acylation kettle and a high deacidification kettle, wherein esterification reaction is carried out through the esterification kettle 1, the dehydration kettle 2 is used for carrying out dehydration treatment on an esterified substance, then the dehydrated esterified substance is subjected to pre-deacidification treatment, acylation treatment and high deacidification treatment, the precision and concentration of a product are ensured, a conveying pipe 3 is connected between the esterification kettle 1 and the dehydration kettle 2, a conveying pump is connected inside the conveying pipe 3, and substances in the esterification kettle 1 are conveyed into the dehydration kettle 2 through the conveying pump.
The esterification reaction kettle is characterized in that the upper end of the esterification reaction kettle 1 is fixedly connected with a plurality of feeding pipes 4, the feeding pipes 4 are connected with external feeding equipment, the inside of the esterification reaction kettle 1 is fed through the feeding pipes 4, the esterification reaction is conveniently carried out in the esterification reaction kettle 1, stirring paddles are rotatably connected in the esterification reaction kettle 1, the acceleration of the esterification reaction in the esterification reaction kettle 1 is realized through the rotation of the stirring paddles, the stirring of materials in the esterification reaction kettle 1 is realized through the stirring paddles, and the inside of the esterification reaction kettle 1 can be fully subjected to the esterification reaction.
The dehydration kettle 2 inside be provided with dewatering device, through dewatering device inside dewatering kettle 2 realize carrying out dewatering treatment to the material after the esterification reaction, so dewatering device include multistage dehydration structure, multistage dewatering structure up-down end to end, realize carrying out multistage dewatering treatment to the material, dewatering structure include with dewatering kettle 2 coaxial heating cylinder 6 that sets up, heating cylinder 6 in coaxial rotation be connected with rotary cylinder 7, rotary cylinder 7 on set up a plurality of holes 8 that permeate water, heating cylinder 6 inner wall coaxial coupling have high temperature annular slab 9, high temperature annular slab 9 with place in heating cylinder 6 inside electric heating device link to each other, through electric heating device realize to high temperature annular slab 9's heating, make high temperature annular slab 9 be in the high temperature state all the time, the material after the esterification get into rotary cylinder 7 inside, rotary cylinder 7 rotate, will the rotary cylinder 7 in permeate water the annular slab's of inner wall coaxial coupling have high temperature annular slab 9, the evaporation product is carried out to the high temperature, the material that evaporates in the high temperature is continuous, the material that evaporates in the high temperature annular slab 9, the evaporation product is evaporated, the high temperature is continuous, the product is evaporated down the high temperature in the inside the water phase, the product is evaporated.
The lower end of the heating cylinder 6 is in a round table shape, the lower end of the heating cylinder 6 at the upper side is arranged in the rotary cylinder 7 at the lower side, dehydrated materials are conveyed to the rotary cylinder 7 at the lower stage, the lower end of the heating cylinder 6 is connected with an external storage device, and the dehydrated esterified materials are collected through the external storage device.
The upper end of the heating cylinder 6 is provided with a plurality of exhaust holes 10, the exhaust holes 10 are communicated with the inside of the dehydration kettle 2, the inside of the dehydration kettle 2 is connected with an external negative pressure device, so that the air pressure in the inside of the dehydration kettle 2 is lower than the air pressure in the inside of the heating cylinder 6, and water vapor generated in the dehydration process enters the inside of the dehydration kettle 2 through the exhaust holes 10, and meanwhile, the water vapor continuously flows to the inside of the dehydration kettle 2 and then to one side of the negative pressure device due to the fact that the dehydration kettle 2 is connected with the external negative pressure device, and separation of the water vapor and esterified matters is realized.
The dehydration kettle 2 lower extreme fixedly connected with fluid-discharge tube 11, fluid-discharge tube 11 and external receipts liquid bucket link to each other, simultaneously the inner wall of dehydration kettle 2 be connected with the refrigerator, through the refrigerator realize to the cooling of dehydration kettle 2 inner wall, and then realize getting into the liquefaction of dehydration kettle 2 inside vapor, be convenient for collect the liquefaction of vapor after the separation.
In this embodiment, during implementation, firstly, raw materials are placed in the esterification kettle 1 through the feed pipe 4, raw materials entering the esterification kettle 1 are subjected to an esterification reaction rapidly under the stirring action of the stirring blade, so as to obtain corresponding esterified materials, the esterified materials after the esterification are conveyed to the dehydration kettle 2 through the conveying pump, and then conveyed to the uppermost rotary drum 7, the esterified materials are subjected to a multistage dehydration reaction, so that water vapor is separated and liquefied and then discharged to the outside, and meanwhile, the dehydrated esterified materials enter the liquid collection drum through the liquid discharge pipe 11, so that the dehydration treatment of the esterified materials is completed, and meanwhile, the refining treatment of the esterified materials is realized.
In order to ensure that the rotary drum 7 rotates, the material is effectively filled in the rotary drum 7, meanwhile, the rotary drum 7 can synchronously rotate, a plurality of rotary drums 7 are coaxially and fixedly connected, the rotary drum 7 synchronously rotates, the uppermost rotary drum 7 is coaxially and fixedly connected with a rotary rod 12, the upper end of the rotary rod 12 is coaxially and fixedly connected with a middle rod sleeve 13, the middle rod sleeve 13 is connected with a driving shaft in the dehydration kettle 2 through a chain transmission mechanism, the driving shaft is connected with a driving motor connected with the upper end of the dehydration kettle 2, the driving motor rotates, the middle rod sleeve 13 is driven by the chain transmission mechanism to synchronously rotate, the rotary rod 12 is driven by the rotation of the middle rod sleeve 13 to synchronously rotate, and the esterified material solution is thrown into the heating drum 6.
The upper end of the middle rod sleeve 13 is rotationally connected with a liquid inlet pipe 15, the middle rod sleeve 13 and the liquid inlet pipe 15 are relatively rotated, so that an esterified substance solution can smoothly enter the rotary cylinder 7, the liquid inlet pipe 15 is communicated with the conveying pipe 3, a plurality of liquid penetrating holes 16 are formed in the lower end of the middle rod sleeve 13, liquid is supplied to the uppermost rotary cylinder 7 through the liquid inlet pipe 15, the middle rod sleeve 13 and the liquid penetrating holes 16, and the esterified substance is filled into the rotary cylinder 7 through the liquid penetrating holes 16 at the process head of liquid conveying.
After vapor gets into dehydration cauldron 2 inside, dehydration cauldron 2 inner wall can appear the condensation liquefaction of vapor, in order in time to clear up the vapor after the liquefaction, so this embodiment provides a scrape the water structure, specifically, the coaxial fixed cover in middle pole cover 13 periphery be equipped with synchronous rotating frame 17 middle pole cover 13 pivoted process drive synchronous rotating frame 17 synchronous rotation, synchronous rotating frame 17 on fixedly connected with a plurality of rotation scrapers 18, rotation scrapers 18 with dehydration cauldron 2's inner wall laminating mutually, dehydration cauldron 2 inside bottom fixedly connected with wedge ring 19, through wedge ring 19 realize the direction to liquid, in complain search for the synchronous rotating frame 17 rotation process of fox drive rotation scrapers 18 synchronous rotation, and then drive and realize collecting the vapor after the liquefaction, wedge ring 19 realize the direction to liquid simultaneously, be convenient for follow-up collection to the vapor after the liquefaction.
In order to avoid the adhesion of vapor on the outer wall of the heating cylinder 6, reduce the temperature in the heating cylinder 6, guarantee simultaneously that vapor can be better carried to inside the dehydration kettle 2, reduce the influence of vapor liquefaction to the temperature of the heating cylinder 6, so the inside annular ventilation bin 20 of having seted up of heating cylinder 6 lateral wall, the heating cylinder 6 outer wall all set up with annular ventilation bin 20 be linked together exhaust pore 21, annular ventilation bin 20 and external air feeder link to each other, realize ventilating annular ventilation bin 20 through external air feeder, the air current is passed through exhaust pore 21 simultaneously to be arranged in the dehydration kettle 2, and then drive the air current to keep away from heating cylinder 6 one side and flow, and then make vapor carry to the external world and be in the process that the air current flows the dehydration kettle 2 inner wall liquefies.
The upper side inside the esterification kettle 1 is fixedly connected with a conical flow guiding sleeve 22, the lower end of the conical flow guiding sleeve 22 is coaxially and fixedly connected with a discharging pipe 23, the lower end of the esterification kettle 1 is fixedly communicated with a discharging pipe 24, the discharging pipe 24 is communicated with the conveying pipe 3, the discharging pipe 23 is used for feeding the esterified substance into the esterification kettle 1, and the esterified substance is conveyed into the dehydration kettle 2 through the discharging pipe 24.
In order to ensure full esterification mixing of raw materials, batch feeding is needed to be carried out on the esterification kettle 1, batch esterification reaction is carried out to ensure that the esterified materials after complete esterification enter the next process, so the embodiment provides a structure capable of ensuring batch feeding and discharging, specifically, an upper sealing plug 25 is coaxially connected up and down in a sliding manner below the feeding pipe 4, the feeding control of the esterification kettle 1 is realized through the cooperation of the upper sealing plug 25 and the feeding pipe 4, a lower sealing plug 27 is coaxially connected up and down in the upper part of the discharging pipe 23 in a sliding manner, the discharging control of the esterification kettle 1 is realized through the cooperation of the lower sealing plug 27 and the discharging pipe 23, an upper sleeve 26 is coaxially connected with the lower sealing plug 27, the upper sleeve 26 and the lower sleeve 28 are coaxially connected with a lifting shaft lever 29 which is rotatably connected with the axis of the esterification kettle 1 in a rotating manner, and the upper sleeve 26 is coaxially connected. The lower sleeve 28 and the lifting shaft lever 29 synchronously lift, so that the alternate operation of opening the feeding pipe 4 and opening the discharging pipe 23 is realized, the material in the esterification kettle 1 is ensured to be fully subjected to esterification, the stirring paddles are coaxially and fixedly connected with the lifting shaft lever 29, and the rotation of the lifting shaft lever 29 drives the stirring paddles to synchronously rotate, so that the effective progress of the esterification is ensured.
The upper end fixedly connected with lifter plate 31 of lifter plate 29, lifter plate 31 with rotate and connect the inside adjusting screw 32 threaded connection of esterifying cauldron 1, adjusting screw 32 with connect the accommodate motor on esterifying cauldron 1 link to each other, through the rotation of accommodate motor drive adjusting screw 32's synchronous rotation, and then drive lifter plate 31 lift, and then drive lifter plate 29 lift, and then realize the control of opening and close of unloading pipe 23, row material pipe 24.
The lifting shaft lever 29 is connected with the driving rod 33 in the esterification kettle 1 in a rotating manner to be connected in a sliding manner up and down, the driving rod 33 is connected with the driving motor in a rotating manner on the esterification kettle 1, the driving of the driving rod 33 is realized through the driving motor, and meanwhile, the lifting shaft lever 29 can be effectively driven to rotate while lifting.
The upper sealing plug 25 is connected with the upper sleeve 26 in an up-down sliding manner, the lower end of the upper sleeve 26 is coaxially and fixedly connected with an upper supporting ring 34, the upper supporting ring 34 is connected with the upper sealing plug 25 through a spring, the upper end of the lower sleeve 28 is coaxially and fixedly connected with a lower supporting ring 35, the lower supporting ring 35 is connected with the lower sealing plug 27 through a spring, when the upper sleeve 26 slides upwards, the lower material pipe 23 is closed, after the closing is completed, the lifting shaft lever 29 continuously rises, the spring is contracted, meanwhile, the spring connected with the lower end and the lower sealing plug 27 is reset firstly, then the lower sealing plug 27 moves upwards, the material discharging pipe 24 is opened after the lower material discharging pipe 23 is closed, the material discharging pipe 23 is opened after the lower sealing plug 27 is closed firstly, and the material discharging pipe 23 and the material discharging pipe 24 are alternately matched.
When the esterification reaction kettle is specifically used, in an initial state, firstly, raw materials are placed in the esterification kettle 1 through a feed pipe 4, meanwhile, a discharge pipe 24 is closed, raw materials entering the esterification kettle 1 are subjected to esterification reaction rapidly under the stirring action of a stirring blade, so that corresponding esterified matters are obtained, after the esterification is finished, a lifting shaft lever 29 is lifted, a discharging pipe 23 is effectively closed, and after the completion of the sealing, the discharge pipe 24 is opened, the esterified matters are conveyed into a dehydration kettle 2 through a conveying pump and then conveyed into an uppermost rotary cylinder 7, the esterified matters are subjected to multistage dehydration reaction, water vapor is separated and liquefied and then discharged to the outside, and meanwhile, the dehydrated esterified matters enter the liquid receiving barrel through a liquid discharge pipe 11, so that the dehydration treatment of the esterified matters is finished, and meanwhile, the refining treatment of the esterified matters is realized.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (8)
1. The production and processing system of the glyceryl triacetate comprises an esterification kettle (1), a dehydration kettle (2), a pre-deacidification kettle, an acylation kettle and a high deacidification kettle, wherein esterification reaction is carried out through the esterification kettle (1), the dehydration kettle (2) is used for carrying out dehydration treatment on an esterified substance, and then the dehydrated esterified substance is subjected to pre-deacidification treatment, acylation treatment and high deacidification treatment, and the production and processing system is characterized in that a conveying pipe (3) is connected between the esterification kettle (1) and the dehydration kettle (2), the conveying pipe (3) is internally connected with a conveying pump, and substances in the esterification kettle (1) are conveyed into the dehydration kettle (2) through the conveying pump;
The upper end of the esterification kettle (1) is fixedly connected with a plurality of feeding pipes (4), the feeding pipes (4) are connected with external feeding equipment, stirring paddles are rotatably connected inside the esterification kettle (1), and the acceleration of the esterification reaction inside the esterification kettle (1) is realized through the rotation of the stirring paddles;
The dehydration kettle (2) is internally provided with a dehydration device, the dehydration device comprises a multi-stage dehydration structure, the multi-stage dehydration structure is connected end to end from top to bottom, the dehydration structure comprises a heating cylinder (6) coaxially arranged with the dehydration kettle (2), the heating cylinder (6) is coaxially connected with a rotating cylinder (7) in a rotating way, the rotating cylinder (7) is provided with a plurality of water permeable holes (8), the inner wall of the heating cylinder (6) is coaxially connected with a high-temperature annular plate (9), and the high-temperature annular plate (9) is connected with an electric heating device arranged inside the heating cylinder (6);
The lower end of the heating cylinder (6) is in a round table shape, the lower end of the heating cylinder (6) at the upper side is arranged in the rotary cylinder (7) at the lower side, the dehydrated material is conveyed into the rotary cylinder (7) at the next stage, and the lower end of the heating cylinder (6) at the lowest end is connected with an external storage device;
The upper end of the heating cylinder (6) is provided with a plurality of exhaust holes (10), the exhaust holes (10) are communicated with the inside of the dehydration kettle (2), and the inside of the dehydration kettle (2) is connected with an external negative pressure device, so that the air pressure in the dehydration kettle (2) is lower than the air pressure in the heating cylinder (6);
The lower end of the dehydration kettle (2) is fixedly communicated with a liquid discharge pipe (11), and the liquid discharge pipe (11) is connected with an external liquid collecting barrel.
2. The glyceryl triacetate production and processing system according to claim 1, wherein a plurality of rotating drums (7) are coaxially and fixedly connected, the uppermost rotating drum (7) is coaxially and fixedly connected with a rotating rod (12), the upper end of the rotating rod (12) is coaxially and fixedly connected with a middle rod sleeve (13), the middle rod sleeve (13) is connected with a driving shaft connected inside the dehydration kettle (2) through a chain transmission mechanism, and the driving shaft is connected with a driving motor connected at the upper end of the dehydration kettle (2).
3. The glyceryl triacetate production and processing system according to claim 2, wherein the upper end of the middle rod sleeve (13) is rotatably connected with a liquid inlet pipe (15), the liquid inlet pipe (15) is communicated with the conveying pipe (3), the lower end of the middle rod sleeve (13) is provided with a plurality of liquid permeable holes (16), and liquid is supplied to the uppermost rotary cylinder (7) through the liquid inlet pipe (15), the middle rod sleeve (13) and the liquid permeable holes (16).
4. The glyceryl triacetate production and processing system according to claim 3, wherein the synchronous rotating frame (17) is coaxially and fixedly sleeved on the periphery of the middle rod sleeve (13), a plurality of rotating scrapers (18) are fixedly connected to the synchronous rotating frame (17), the rotating scrapers (18) are attached to the inner wall of the dehydration kettle (2), a wedge-shaped ring (19) is fixedly connected to the bottom end inside the dehydration kettle (2), and liquid guiding is achieved through wedge-shaped replacement.
5. The glyceryl triacetate production and processing system according to claim 4, wherein the annular ventilation bin (20) is formed in the side wall of the heating cylinder (6), the exhaust pores (21) communicated with the annular ventilation bin (20) are formed in the outer wall of the heating cylinder (6), and the annular ventilation bin (20) is connected with an external air supply device.
6. An esterification kettle (1) is characterized in that the esterification kettle (1) is applied to the triacetin production and processing system according to claim 5, a conical guide sleeve (22) is fixedly connected to the upper side of the inside of the esterification kettle (1), a blanking pipe (23) is coaxially and fixedly connected to the lower end of the conical guide sleeve (22), a discharging pipe (24) is fixedly communicated to the lower end of the esterification kettle (1), and the discharging pipe (24) is communicated with the conveying pipe (3);
The upper part of the blanking pipe (23) is coaxially connected with a lower sealing plug (27) in an up-down sliding manner, the upper sealing plug (25) is coaxially connected with an upper sleeve (26), the lower sealing plug (27) is coaxially connected with a lower sleeve (28), the upper sleeve (26) and the lower sleeve (28) are coaxially and rotatably connected with a lifting shaft lever (29) which is rotatably connected with the axis of the esterification kettle (1), the stirring blade is coaxially and fixedly connected with the lifting shaft lever (29), and the stirring blade is synchronously rotated by the rotation of the lifting shaft lever (29);
The upper end of the lifting shaft lever (29) is fixedly connected with a lifting plate (31), the lifting plate (31) is in threaded connection with an adjusting screw (32) rotatably connected to the inside of the esterification kettle (1), and the adjusting screw (32) is connected with an adjusting motor connected to the esterification kettle (1);
The lifting shaft lever (29) is connected with a driving rod (33) in the esterification kettle (1) in a rotating way in a sliding way up and down, and the driving rod (33) is connected with a driving motor in the esterification kettle (1) in a rotating way.
7. The esterification kettle (1) according to claim 6, wherein the upper sealing plug (25) is connected with the upper sleeve (26) in an up-down sliding way, the lower end of the upper sleeve (26) is coaxially and fixedly connected with an upper supporting ring (34), and the upper supporting ring (34) is connected with the upper sealing plug (25) through a spring;
The upper end of the lower sleeve (28) is coaxially and fixedly connected with a lower supporting ring (35), and the lower supporting ring (35) is connected with the lower sealing plug (27) through a spring.
8. An esterification method for producing glyceryl triacetate, characterized by using the glyceryl triacetate production processing system according to claim 7, comprising the following steps:
Firstly, placing raw materials into the esterification kettle (1) through a feed pipe (4);
Step two, the raw materials entering the esterification kettle (1) are rapidly subjected to esterification reaction under the stirring action of the stirring blade, so as to obtain corresponding esterified substances;
step three, conveying the esterified substance after esterification to the inside of the dehydration kettle (2) through the conveying pump, and then conveying the esterified substance to the inside of the rotary cylinder (7) at the uppermost end;
step four, the esterified substance is subjected to multistage dehydration reaction, so that the water vapor is separated and liquefied and then discharged to the outside, and the dehydrated esterified substance enters the subsequent process through the liquid discharge pipe (11);
And fifthly, sequentially carrying out pre-deacidification, acylation and high deacidification treatment on the dehydrated esterified substance.
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