CN219518840U - Combined reaction system suitable for dehydration polymerization reaction - Google Patents

Combined reaction system suitable for dehydration polymerization reaction Download PDF

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Publication number
CN219518840U
CN219518840U CN202320507334.2U CN202320507334U CN219518840U CN 219518840 U CN219518840 U CN 219518840U CN 202320507334 U CN202320507334 U CN 202320507334U CN 219518840 U CN219518840 U CN 219518840U
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film evaporator
thin film
reaction kettle
reaction
inlet
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CN202320507334.2U
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谷红丽
李栋杰
高郁天
方品文
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Shanghai Hanhe Biological New Material Technology Co ltd
Shanxi Research Institute Of Biomass New Materials Industry Co ltd
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Shanghai Hanhe Biological New Material Technology Co ltd
Shanxi Research Institute Of Biomass New Materials Industry Co ltd
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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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency

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Abstract

The utility model relates to a combined reaction system suitable for dehydration polymerization reaction, which comprises a thin film evaporator, a reaction kettle and a condensing device, wherein the thin film evaporator is positioned above the reaction kettle, a material inlet of the thin film evaporator is connected with a raw material supply pipe and an outlet of a conveying pump in parallel, and an inlet of the conveying pump is connected with a discharge hole of the reaction kettle and is used for inputting materials in the reaction kettle into the thin film evaporator; the material outlet of the thin film evaporator is connected with the feed inlet of the reaction kettle and is used for inputting the evaporated and concentrated material into the reaction kettle; the water outlet of the film evaporator is connected with a condensing device; the reaction kettle is connected with a condensing device through a water pipe; the film evaporator is internally provided with a rotary film scraping device.

Description

Combined reaction system suitable for dehydration polymerization reaction
Technical Field
The utility model belongs to the technical field of dehydration polymerization reaction equipment, and particularly relates to a combined reaction system suitable for dehydration polymerization reaction.
Background
Dehydration polymerization refers to a reaction in which two or more organic molecules interact and then are covalently bonded to form a macromolecule, while water is lost. Because water is produced in the reaction process, and the raw material reactant is organic and is not compatible with water, the existence of water in the raw material has no good effect on the raw material and the reaction process, and the water in the raw material should be removed as much as possible. At present, the main stream is that raw materials are dehydrated and then uniformly input into a reactor for dehydration polymerization reaction, products obtained after the reaction are output, and the products are subjected to oil-water separation. In the reaction process, water generated by materials is not separated in real time, and organic materials (including raw materials, intermediate products and final products) in the reactor cannot be discharged in real time, so that the reaction efficiency is low.
Disclosure of Invention
The utility model aims to solve the technical problems that: in the reaction process, the existing dehydration polymerization reaction device cannot separate moisture in real time, and cannot separate moisture from organic phase materials in real time. Aiming at the technical problem, the utility model provides a combined reaction system suitable for dehydration polymerization reaction, which can lead materials in a reaction kettle out to a thin film evaporator in real time, and the materials are returned to the reaction kettle after being dehydrated by the thin film evaporator, so that the real-time dehydration of the reaction materials is realized by means of the circulation.
The combined reaction system suitable for the dehydration polymerization reaction comprises a thin film evaporator, a reaction kettle and a condensing device, wherein the thin film evaporator is positioned above the reaction kettle, a material inlet of the thin film evaporator is connected with a raw material supply pipe and an outlet of a delivery pump in parallel, and an inlet of the delivery pump is connected with a discharge port of the reaction kettle and is used for inputting materials in the reaction kettle into the thin film evaporator; the material outlet of the thin film evaporator is connected with the feed inlet of the reaction kettle and is used for inputting the evaporated and concentrated material into the reaction kettle; the water outlet of the film evaporator is connected with a condensing device; the reaction kettle is connected with a condensing device through a water pipe; the film evaporator is internally provided with a rotary film scraping device.
Optionally, the thin film evaporator is a wiped film evaporator, the top is provided with a material inlet and a water outlet, the upper part is provided with a dispersion disc, the bottom is provided with a material outlet, and the material dehydrated by the thin film evaporator flows into the reaction kettle by gravity;
and a heating jacket is arranged on the outer side of the thin film evaporator, and surrounds the part of the thin film evaporator between the material inlet and the material outlet and is used for providing heat.
Further optionally, the rotary film scraping device comprises a motor, a rotating shaft and a scraping plate, wherein the motor is arranged above the thin film evaporator and is connected with the top end of the rotating shaft, and the rotating shaft sequentially penetrates through the top surface of the thin film evaporator and the dispersing disc from the top of the thin film evaporator to enter the thin film evaporator;
the stirring shaft is arranged below the dispersing disc, a plurality of connecting rods are uniformly arranged at the part of the stirring shaft below the dispersing disc, the connecting rods are radially directed to the inner wall of the film evaporator and are connected with the scraping plates.
Further optionally, the material inlet and the water outlet are provided on opposite sides of the top of the thin film evaporator.
Further optionally, the dispersing disc is uniformly and densely provided with a plurality of through holes.
Further optionally, a heat medium inlet and a heat medium outlet are respectively arranged at two sides of the heating jacket, and are used for inputting and outputting heat medium for the heating jacket.
Optionally, a feed inlet, a water outlet and a vacuum pump are arranged at the top of the reaction kettle, the vacuum pump is used for vacuumizing the inside of the reaction kettle, a stirrer is arranged in the vacuum pump and used for stirring materials in the reaction kettle, and a discharge port and a product port are arranged at the bottom of the vacuum pump and are respectively used for returning the materials in the reaction kettle to the thin film evaporator through a conveying pump and outputting the reacted products;
the water outlet is connected with a water delivery pipe and is used for inputting water generated in the reaction kettle into the condensing device.
Preferably, the delivery pump is a gear pump.
Further optionally, an inclined conveying pipe is connected between the discharge port and the inlet of the conveying pump, and the inclined conveying pipe is arranged obliquely downwards.
Optionally, the condensing unit comprises a condenser and a water collecting tank, wherein the inlet of the condenser is connected with the water outlet of the thin film evaporator and the water delivery pipe in parallel, and the outlet of the condenser is connected with the water collecting tank and is used for recovering and condensing and collecting moisture generated by the thin film evaporator and the reaction kettle.
The combined reaction system suitable for dehydration polymerization reaction has the following beneficial effects:
(1) Materials in the reaction kettle can circulate between the film evaporator and the reaction kettle, and return to the reaction kettle after water removal, so that the total reaction time is shortened, and the polycondensation efficiency is improved;
(2) And the effluent of the reaction kettle and the effluent of the thin film evaporator are both input into a condensing device and are subjected to centralized treatment, so that the reaction kettle can remove water in real time in the reaction process.
Drawings
FIG. 1 is a schematic diagram of a combined reaction system suitable for use in a dehydration polymerization reaction.
In the attached drawings, 1. A motor; 2. a material inlet; 3. a dispersion plate; 4. a heating jacket; 5. a rotating shaft; 6. a scraper; 7. a feed inlet; 8. a reaction kettle; 9. tilting the feed delivery pipe; 10. a transfer pump; 11. a water collecting tank; 12. a condenser; 13. a thin film evaporator; 14. a raw material supply pipe; 15. a discharge port; 16. a material outlet; 17. a water outlet; 18. a water pipe; 19. and a vacuum pump.
Detailed Description
The combined reaction system suitable for dehydration polymerization reaction provided in this embodiment, as shown in fig. 1, includes a thin film evaporator 13, a reaction kettle 8 and a condensing device, where the thin film evaporator 13 is located above the reaction kettle 8, a material inlet 2 of the thin film evaporator 13 is connected in parallel with a raw material supply pipe 14 and an outlet of a delivery pump 10, and an inlet of the delivery pump 10 is connected with a discharge port 15 of the reaction kettle 8, and is used for inputting materials in the reaction kettle 8 into the thin film evaporator 13; the material outlet 16 of the thin film evaporator 13 is connected with the feed inlet 7 of the reaction kettle 8 and is used for inputting the evaporated and concentrated material into the reaction kettle 8; the water outlet 17 of the film evaporator 13 is connected with a condensing device; the reaction kettle 8 is connected with a condensing device through a water pipe 18; a rotary film scraping device is arranged in the film evaporator 13.
Optionally, the thin film evaporator 13 is a wiped film evaporator, the top is provided with a material inlet 2 and a water outlet 17, the upper part is provided with a dispersion disc 3, the bottom is provided with a material outlet 16, and the material dehydrated by the thin film evaporator 13 flows into the reaction kettle 8 by gravity;
the outside of the thin film evaporator 13 is provided with a heating jacket 4, and the heating jacket 4 surrounds the part of the thin film evaporator 13 between the material inlet 2 and the material outlet 16 for providing heat.
Further optionally, the rotary film scraping device comprises a motor 1, a rotating shaft 5 and a scraping plate 6, wherein the motor 1 is arranged above the thin film evaporator 13 and is connected with the top end of the rotating shaft 5, and the rotating shaft 5 sequentially penetrates through the top surface of the thin film evaporator 13 and the dispersing disc 3 from the top of the thin film evaporator 13 to enter the thin film evaporator 13;
the part of the stirring shaft below the dispersion plate 3 is uniformly provided with a plurality of connecting rods, the connecting rods are radially directed to the inner wall of the thin film evaporator 13 and are connected with the scraping plate 6, and the distance between the scraping plate 6 and the inner wall of the thin film evaporator 13 is smaller, for example, 1-5mm.
Further optionally, the scraping plate 6 includes a plurality of plate bodies with curved radians, the curved surfaces of the plate bodies are matched with the inner wall of the thin film evaporator 13, the number of the plate bodies is even, and the plate bodies are symmetrically distributed with the rotation shaft 5 as a center.
Further optionally, the scraping plate 6 is a hollow cylinder, and the cylinder is matched with the inner wall of the thin film evaporator 13.
Further alternatively, the material inlet 2 and the water outlet 17 are provided on opposite sides of the top of the thin film evaporator 13, i.e. the material inlet 2 and the water outlet 17 are provided opposite to each other.
Further alternatively, the dispersing plate 3 is uniformly and densely provided with a plurality of through holes, so that the material entering from the material inlet 2 is uniformly distributed on the cross section of the thin film evaporator 13.
Further optionally, a heat medium inlet and a heat medium outlet are respectively arranged at two sides of the heating jacket 4, and are used for inputting and outputting a heat medium for the heating jacket 4, wherein the heat medium is selected from heat conduction oil and heat steam.
After entering the film evaporator 13, the materials are uniformly dispersed through the dispersing disc 3, flow down along the side wall, are distributed on the inner wall surface to form a downward rotating film under the driving of gravity and the scraping wall of the rotary scraping plate 6, are concentrated by the film in the descending process, and the concentrated materials are discharged from the bottom and flow into the reaction kettle 8 again by gravity. The thin film evaporator 13 has strong material inclusion and is suitable for evaporating feed liquid with high viscosity, easy crystallization, easy scaling, suspended matters and the like. The evaporation area is the inner wall area corresponding to the heating jacket 4, the heat transfer coefficient is higher, the evaporation intensity is high, the operation is simple, and the cleaning is convenient.
Optionally, a feed inlet 7, a water outlet and a vacuum pump 19 are arranged at the top of the reaction kettle 8, the vacuum pump 19 is used for vacuumizing the reaction kettle 8 and providing a vacuum environment for polymerization reaction, a stirrer is arranged in the reaction kettle 8 and used for stirring materials in the reaction kettle 8, a discharge port 15 and a product port are arranged at the bottom of the reaction kettle 8 and are respectively used for returning the materials in the reaction kettle 8 to the thin film evaporator 13 through a conveying pump 10 and outputting the reacted products;
the water outlet is connected with a water pipe 18 and is used for inputting water generated in the reaction kettle 8 into a condensing device.
Preferably, the conveying pump 10 is a gear pump, which can effectively convey viscous materials, and convey materials in the reaction kettle 8 to the material inlet 2 positioned at the top of the thin film evaporator 13 from below.
Further optionally, an inclined conveying pipe 9 is connected between the discharge hole 15 and the inlet of the conveying pump 10, the inclined conveying pipe 9 is arranged obliquely downwards, and the traction force caused by vacuumizing in the reaction kettle 8 can be resisted through the component force of gravity in the direction of an inclined angle, so that materials can smoothly flow from the reaction kettle 8 to the conveying pump 10.
Further optionally, a pressure gauge is arranged at the upper part of the reaction kettle 8, and the pressure in the reaction kettle 8 is monitored in real time; the outside of the reaction kettle 8 is provided with a jacket, and heat conduction oil is introduced into the jacket for heating the reaction kettle.
Optionally, the condensing device comprises a condenser 12 and a water collecting tank 11, wherein the inlet of the condenser 12 is connected with the water outlet 17 of the thin film evaporator 13 and the water delivery pipe 18 in parallel, and the outlet of the condenser 12 is connected with the water collecting tank 11 and is used for recovering and condensing and collecting moisture generated by the thin film evaporator 13 and the reaction kettle 8.
The film evaporator 13, the reaction kettle 8 and the condensing device are provided with corresponding supporting frames, so that the stable supporting of each device is ensured.

Claims (8)

1. The combined reaction system suitable for the dehydration polymerization reaction is characterized by comprising a thin film evaporator, a reaction kettle and a condensing device, wherein the thin film evaporator is positioned above the reaction kettle, a material inlet of the thin film evaporator is connected with a raw material supply pipe and an outlet of a conveying pump in parallel, and an inlet of the conveying pump is connected with a discharge hole of the reaction kettle and is used for inputting materials in the reaction kettle into the thin film evaporator; the material outlet of the thin film evaporator is connected with the feed inlet of the reaction kettle and is used for inputting the evaporated and concentrated material into the reaction kettle; the water outlet of the film evaporator is connected with a condensing device; the reaction kettle is connected with a condensing device through a water pipe; the film evaporator is internally provided with a rotary film scraping device.
2. The combined reaction system suitable for dehydration polymerization reaction according to claim 1, wherein the thin film evaporator is a wiped film evaporator, the top is provided with a material inlet and a water outlet, the upper part is provided with a dispersion plate, the bottom is provided with a material outlet, and the material dehydrated by the thin film evaporator flows into the reaction kettle by gravity;
and a heating jacket is arranged on the outer side of the thin film evaporator, and surrounds the part of the thin film evaporator between the material inlet and the material outlet and is used for providing heat.
3. The combined reaction system suitable for dehydration polymerization reaction according to claim 2, wherein the rotary film scraping device comprises a motor, a rotating shaft and a scraping plate, the motor is arranged above the thin film evaporator and is connected with the top end of the rotating shaft, and the rotating shaft sequentially penetrates through the top surface of the thin film evaporator and the dispersing disc from the top of the thin film evaporator to enter the thin film evaporator;
the part of the rotating shaft below the dispersion plate is uniformly provided with a plurality of connecting rods, and the connecting rods are radially directed to the inner wall of the film evaporator and are connected with the scraping plates.
4. The combined reaction system for the dehydration polymerization reaction according to claim 2, wherein the material inlet and the water outlet are arranged at opposite sides of the top of the thin film evaporator, and the dispersion plate is uniformly densely provided with a plurality of through holes.
5. The combined reaction system for dehydration polymerization according to claim 2, wherein the heating jacket is provided with a heat medium inlet and a heat medium outlet at both sides thereof, respectively, for inputting and outputting a heat medium to and from the heating jacket.
6. The combined reaction system suitable for dehydration polymerization reaction according to claim 1, wherein the top of the reaction kettle is provided with a feed inlet, a water outlet and a vacuum pump, the vacuum pump is used for vacuumizing the inside of the reaction kettle, a stirrer is arranged in the vacuum pump and used for stirring materials in the reaction kettle, and the bottom is provided with a discharge port and a product port which are respectively used for returning the materials in the reaction kettle to the thin film evaporator through a conveying pump and outputting the reacted products;
the water outlet is connected with a water delivery pipe and is used for inputting water generated in the reaction kettle into the condensing device.
7. The combined reaction system for dehydration polymerization according to claim 6, wherein the transfer pump is a gear pump; an inclined conveying pipe is connected between the discharge hole and the inlet of the conveying pump and is arranged obliquely downwards.
8. The combined reaction system for dehydrative polymerization of claim 1, wherein the
The condensing device comprises a condenser and a water collecting tank, the inlet of the condenser is connected with the water outlet of the thin film evaporator and the water delivery pipe in parallel,
the outlet of the condenser is connected with a water collecting tank and is used for recovering the moisture generated by the film evaporator and the reaction kettle and condensing and collecting the moisture.
CN202320507334.2U 2023-03-16 2023-03-16 Combined reaction system suitable for dehydration polymerization reaction Active CN219518840U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320507334.2U CN219518840U (en) 2023-03-16 2023-03-16 Combined reaction system suitable for dehydration polymerization reaction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320507334.2U CN219518840U (en) 2023-03-16 2023-03-16 Combined reaction system suitable for dehydration polymerization reaction

Publications (1)

Publication Number Publication Date
CN219518840U true CN219518840U (en) 2023-08-15

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ID=87633341

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320507334.2U Active CN219518840U (en) 2023-03-16 2023-03-16 Combined reaction system suitable for dehydration polymerization reaction

Country Status (1)

Country Link
CN (1) CN219518840U (en)

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