CN213467743U - Reactor for continuous reaction and devolatilization - Google Patents

Abstract

The utility model provides a reactor for continuous reaction and devolatilization. The reactor comprises a first horizontal reaction kettle, a second horizontal reaction kettle and a vacuum devolatilization assembly, wherein a first barrel jacket is covered on the outer side of the first horizontal reaction kettle; and double-shaft stirring devices are arranged in the first horizontal reaction kettle and the second horizontal reaction kettle. In this way, the utility model discloses can make reaction material fully mix and react in first horizontal reation kettle to take off the wave in the horizontal reation kettle of the thick result direct input second of output, take off and wave through extrusion device extrusion moulding after accomplishing, realize taking off from reacting and waving to the fashioned process again, make whole production process go on in succession, improve equipment utilization and reaction efficiency. And the reactor has the advantages of simple integral structure, accurate and controllable reaction process, wide application range and higher application value.

Description

Reactor for continuous reaction and devolatilization

Technical Field

The utility model relates to a polymerization and devolatilization technical field especially relate to a reactor for continuous reaction and devolatilization.

Background

In the production process of high molecular materials, products obtained through polymerization reaction usually contain low molecular weight components such as solvents, unreacted monomers, polymerization byproducts and the like, and the low molecular weight components need to be removed through a devolatilization process so as to improve the product quality. The continuous polymerization reaction process and devolatilization process are beneficial to improving the automation control degree of the whole production process, and the method has the advantages of high equipment utilization rate, low energy consumption, uniform and stable product quality, high production efficiency and the like, and is the development direction of the polymer production process.

In order to continuously carry out the polymerization process and the devolatilization process, a proper reactor is required to be designed. In the prior art, the polymerization reaction process is usually carried out in a reaction kettle provided with a stirring shaft, the devolatilization process is carried out in a devolatilization machine, and the two devices are connected in series, so that the product obtained after the polymerization reaction can enter the devolatilization machine for devolatilization treatment. However, in the actual production process, when the reaction materials or the products thereof have a high viscosity, it is difficult for the conventional reactor to sufficiently mix the materials, resulting in a low reaction efficiency; and the high-viscosity materials are easy to block the reactor and hinder the devolatilization process, so that the overall production efficiency is low, and the quality of the prepared product is poor.

In addition, in the conventional polymer production process, the devolatilization process usually adopts a water injection stripping mode, and low molecular weight components to be removed are carried out by utilizing steam generated by water in a high-temperature vacuum environment through injecting water into a polymer melt. However, the addition of water not only increases the material consumption and the energy consumption for removing water, but also brings about the subsequent wastewater treatment problem, and the whole production cost is higher and the production efficiency is lower.

In view of the above, there is a need for an improved reactor for continuous reaction and devolatilization to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a reactor for continuous reaction and devolatilization. Two horizontal reaction kettles are connected in series, and a vacuum devolatilization assembly and an extrusion device are arranged on a second horizontal reaction kettle, so that a crude product output from a first horizontal reaction kettle directly enters the second horizontal reaction kettle for devolatilization, and is extruded and formed through the extrusion device after devolatilization is finished, and the processes from reaction to devolatilization and then forming are realized; and through set up biax agitating unit in horizontal reation kettle, make the material intensive mixing and reaction in the horizontal reation kettle, improve holistic reaction efficiency and product quality.

In order to realize the aim, the utility model provides a reactor for continuous reaction and devolatilization, which comprises a first horizontal reaction kettle, a second horizontal reaction kettle and a vacuum devolatilization component, wherein the first horizontal reaction kettle is covered with a first cylinder jacket at the outer side, the second horizontal reaction kettle is communicated with the first horizontal reaction kettle and is covered with a second cylinder jacket at the outer side, and the vacuum devolatilization component is connected with the second horizontal reaction kettle; and double-shaft stirring devices are arranged in the first horizontal reaction kettle and the second horizontal reaction kettle.

As a further improvement of the utility model, the vacuum devolatilization component comprises a plurality of and the top of the second horizontal reaction vessel is linked together take off the mouth, be used for the condenser of condensation volatile matter, communicate take off the mouth with the condenser take off wave the pipeline, with the recovery vessel that the bottom of condenser is linked together and with the vacuum pump that the condenser top is connected.

As a further improvement of the utility model, a first feed inlet penetrating through the first barrel jacket is arranged at one end of the top of the first horizontal reaction kettle, and a first discharge outlet penetrating through the first barrel jacket is arranged at one end of the bottom of the first horizontal reaction kettle away from the first feed inlet; and the first discharge hole is communicated with a second feed inlet which is arranged at the top of the second horizontal reaction kettle and penetrates through the second cylinder jacket through a conveying pipeline.

As a further improvement of the utility model, a second discharge hole penetrating through the second cylinder jacket is arranged at one end of the bottom of the second horizontal reaction kettle, which is far away from the second feed inlet; and an extrusion device is arranged at the second discharge port.

As a further improvement of the utility model, the second horizontal reaction kettle is close to the upper part of the side surface of the second feed inlet is provided with a terminator input port.

As a further improvement of the utility model, the first cylinder jacket is a sectional jacket, and comprises a plurality of temperature control jackets arranged at intervals along the length direction of the first horizontal reaction kettle and a heat preservation jacket arranged between adjacent temperature control jackets; the temperature control jacket is internally provided with a temperature control medium inlet and a temperature control medium outlet, and the heat insulation jacket is internally filled with heat insulation materials.

As a further improvement of the utility model, the double-shaft stirring device comprises a double-shaft stirring component and a driving component for driving the double-shaft stirring component; the double-shaft stirring assembly comprises two parallel stirring shafts connected with the driving assembly and a stirring tool arranged on the stirring shafts.

As a further improvement of the utility model, the driving component comprises a motor connected with a stirring shaft and two gears which are respectively sleeved on the two stirring shafts and are mutually meshed.

As a further improvement of the utility model, the stirring tools respectively arranged on the two stirring shafts are arranged in a staggered way; the stirring tool comprises a plurality of groups of stirring elements which are uniformly arranged along the axial direction of the stirring shaft; each group of stirring elements comprises a plurality of stirring rods which are uniformly distributed along the periphery of the stirring shaft and stirring blades arranged at the end parts of the stirring rods.

As a further improvement of the utility model, a plurality of groups of scraping hooks corresponding to the stirring blades are arranged in the first horizontal reaction kettle and the second horizontal reaction kettle; every group scrapes the hook and comprises two relative scraping hooks that set up, leave the confession between the relative scraping hook that sets up stirring vane passes through the space.

The utility model has the advantages that:

(1) the utility model provides a reactor for continuous reaction and devolatilization is through setting up two horizontal reation kettle to make first horizontal reation kettle's discharge gate and second horizontal reation kettle's feed inlet intercommunication, can make in the first horizontal reation kettle in the preliminary product that obtains after the reaction send into the horizontal reation kettle of second in succession. Simultaneously, the top of second horizontal reation kettle is equipped with the vacuum and takes off the subassembly of waving, and discharge gate department is equipped with extrusion device to make the thick result that gets into the second horizontal reation kettle take off the extrusion moulding after waving in succession, realize the material from the reaction to take off to wave again to the fashioned completion process, make whole production process go on in succession, improve equipment utilization and reaction efficiency.

(2) The utility model can realize accurate temperature control of the horizontal reaction kettle by arranging the cylinder jacket outside the horizontal reaction kettle, so that the reaction process and the devolatilization process are carried out at proper temperature; meanwhile, the barrel jacket on the outer side of the horizontal reaction kettle for reaction is a segmented jacket, so that the device can be suitable for reactions needing to be carried out at different temperature stages, and has a wide application range. Furthermore, the utility model discloses a set up the hook of scraping of biax agitating unit and clean usefulness in horizontal reation kettle, can effectively improve the mixing efficiency of material in the reation kettle, make it be applicable to the reaction system who contains the high viscosity material to avoid high viscosity material to pile up in a large number the influence to mixing effect and reaction degree, improve reaction efficiency and product quality.

(3) The utility model provides a reactor for continuous reaction and devolatilization heats the material in the reation kettle through the horizontal reation kettle's of regulation and control second temperature, and the removal is taken off through the vacuum to wave the subassembly and collect after making the material of low boiling volatilize. Volatile substances removed in the devolatilization process can be recovered after condensation, and the method is simple, convenient and efficient; and water is not needed in the whole devolatilization process, no wastewater is discharged and corresponding water washing loss is caused, and the requirements of actual production can be met.

(4) The utility model provides a reactor overall structure for continuous reaction and devolatilization is simple, easily production and use can realize continuous reaction and devolatilization in succession when improving mixing efficiency, and reaction process is accurate, the controllability is strong, has higher using value.

Drawings

Fig. 1 is a schematic structural diagram of a reactor for continuous reaction and devolatilization provided by the present invention at a viewing angle.

Fig. 2 is a schematic structural diagram of a first horizontal reaction kettle in a reactor for continuous reaction and devolatilization provided by the utility model under another view angle.

Reference numerals:

1-a first horizontal reaction kettle; 11-a first feed port; 12-a first discharge port; 2-a second horizontal reaction kettle; 21-a second feed port; 22-a second discharge port; 23-a terminator input port; 3-vacuum devolatilization component; 31-devolatilizing mouth; 32-a devolatilization pipe; 33-a recovery vessel; 34-a vacuum pump; 35-a condenser; 4-a first barrel jacket; 41-temperature control jacket; 42-heat preservation jacket; 5-a second cylinder jacket; 6-a conveying pipeline; 7-a double-shaft stirring device; 71-a first stirring shaft; 72-second stirring shaft; 73-a first gear; 74-a second gear; 75-a motor; 76-a stirring rod; 77-stirring blade; 8-scraping hook; 9-extrusion device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not relevant to the present invention are omitted.

In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1, the present invention provides a reactor for continuous reaction and devolatilization. The reactor comprises a first horizontal reaction kettle 1, a second horizontal reaction kettle 2 communicated with the first horizontal reaction kettle 1 and a vacuum devolatilization component 3 connected with the second horizontal reaction kettle 2.

Specifically, a first cylinder jacket 4 is covered on the outer side of the first horizontal reaction kettle 1. In one embodiment of the present invention, the first barrel jacket 4 is a sectional jacket, and includes four sections of temperature control jackets 41 arranged at intervals along the length direction of the first horizontal reaction kettle 1 and three sections of heat preservation jackets 42 arranged between adjacent temperature control jackets; the heat-insulating jacket 42 is internally provided with heat-insulating materials; a temperature control medium inlet and a temperature control medium outlet are arranged in the temperature control jacket 41, the temperature control medium can be a heating medium or a cooling medium, and the temperature of the temperature control medium and the transmission rate thereof can be controlled to regulate and control the temperature of the corresponding interval of the temperature control jacket 41; the temperature control jackets 41 are mutually independent, so that the sectional temperature control of the first horizontal reaction kettle 1 is realized, the reaction kettle can be suitable for reactions needing to be carried out at different temperature stages, and the application range is wide. In other embodiments of the present invention, the number of the temperature control jackets 41 in the first barrel jacket 4 can be freely set according to actual conditions, and is not limited herein.

Referring to fig. 2, a double-shaft stirring device 7 is provided in the first horizontal reaction tank 1. The double-shaft stirring device 7 comprises a double-shaft stirring component and a driving component for driving the double-shaft stirring component; the double-shaft stirring assembly comprises two parallel stirring shafts connected with the driving assembly and a stirring tool arranged on the stirring shafts.

In one embodiment of the present invention, the two stirring shafts are a first stirring shaft 71 and a second stirring shaft 72 which are arranged on the same horizontal plane in the first horizontal reaction kettle 1 and are parallel to each other; the driving component for driving the first stirring shaft 71 and the second stirring shaft 72 comprises a motor 75 connected with the second stirring shaft 72, and a first gear 73 and a second gear 74 respectively sleeved outside the first stirring shaft 71 and the second stirring shaft 72; the first gear 73 and the second gear 74 are meshed with each other. When the motor 75 is turned on, the second stirring shaft 72 connected to the driving end of the motor 75 rotates around the axis thereof, so that the second gear 74 fixedly sleeved on the first gear of the second stirring shaft 72 rotates along with the second stirring shaft 72, thereby driving the first gear 73 engaged with the second gear 74 to rotate in the direction opposite to the second gear 74, and enabling the first stirring shaft 71 connected to the first gear 73 to rotate in the direction opposite to the second stirring shaft 72. Such a mode of setting up not only can make device simple structure, easy to use, can also make two (mixing) shafts have opposite rotation direction, further promotes the intensive mixing of material in first horizontal reation kettle 1, reaches higher mixing efficiency.

In one embodiment of the present invention, the stirring tool disposed on the first stirring shaft 71 and the stirring tool disposed on the second stirring shaft 72 have the same structure, but are staggered with each other, so as to promote the thorough mixing of the materials while making full use of the inner space of the first horizontal reaction kettle 1. The stirring tool comprises a plurality of groups of stirring elements which are uniformly arranged along the axial direction of a stirring shaft, wherein each group of stirring elements comprises a plurality of stirring rods 76 which are uniformly distributed along the periphery of the stirring shaft and stirring blades 77 arranged at the end parts of the stirring rods 76. When the first stirring shaft 71 and the second stirring shaft 72 rotate, the stirring rod 76 arranged on the corresponding stirring shaft rotates along with the first stirring shaft and drives the stirring blade 77 to rotate, so that the materials are fully stirred, and the mixing effect and the reaction efficiency are improved.

In one embodiment of the present invention, the barrel of the first horizontal reactor 1 is further provided with a scraping hook 8 corresponding to the stirring blade 77. Each stirring blade 77 corresponds to two oppositely disposed scraping hooks 8, the oppositely disposed scraping hooks 8 are respectively located at two sides of the corresponding stirring blade 77, and a gap for the corresponding stirring blade 77 to pass through is left between the scraping hooks 8 at the two sides. When containing the high viscosity material among the reaction mass, stirring vane 77 constantly scrapes the space between the hook 8 through two that correspond with it at rotatory in-process, makes the adhesion be in high viscosity material on stirring vane 77 is scraped when scraping hook 8, has avoided high viscosity material to pile up the influence to stirring effect and reaction degree on stirring vane 77 in a large number, has guaranteed that stirring mixing process's high efficiency goes on to the abundant reaction of high viscosity material has been promoted.

In one embodiment of the present invention, a first feeding hole 11 extending through the first barrel jacket 4 is provided at one end of the top of the first horizontal reaction vessel 1, and a first discharging hole 12 extending through the first barrel jacket 4 is provided at one end of the bottom of the first horizontal reaction vessel 1 away from the first feeding hole 11. The first discharge port 12 is communicated with the feed port of the second horizontal reaction kettle 2.

In one embodiment of the present invention, a second barrel jacket 5 is disposed outside the second horizontal reaction vessel 2 for heating the second horizontal reaction vessel 2 to volatilize low molecular weight components such as solvent, unreacted monomer, and polymerization by-product at high temperature. The top of the second horizontal reaction kettle 2 is provided with a second feeding hole 21 penetrating through the second cylinder jacket 5, and the second feeding hole 21 is communicated with the first discharging hole 12 through a conveying pipeline 6, so that a crude product obtained after the reaction of the first horizontal reaction kettle 1 is directly conveyed into the second horizontal reaction kettle 2.

A terminator input port 23 is further provided in the second horizontal reactor 2 at the upper portion of the side surface near the second feed port 21, for adding a terminator into the second horizontal reactor 2 to terminate the reaction.

Inside the second horizontal reaction kettle 2, a double-shaft stirring device 7 which is the same as that in the first horizontal reaction kettle 1 is also arranged and is used for fully stirring the crude product conveyed into the second horizontal reaction kettle 2 so as to uniformly mix the crude product.

In one embodiment of the present invention, the vacuum devolatilization assembly 3 comprises two devolatilization ports 31 communicated with the top of the second horizontal reaction vessel 2, a condenser 35 for condensing volatile matters, a devolatilization pipeline 32 for communicating the devolatilization ports 31 with the condenser 35, a recovery vessel 33 communicated with the bottom end of the condenser, and a vacuum pump 34 connected with the top end of the condenser. After the vacuum pump 34 is started, the interior of the condenser 35, the recovery container 33 and the devolatilization pipeline 32 is in a negative pressure state, so that the heated and volatilized substances in the second horizontal reaction 2 are removed through the devolatilization port 31 and enter the condenser 35 through the devolatilization pipeline 32 to be condensed, and the liquid phase volatile matters obtained after condensation are collected by the recovery container 33 arranged at the bottom of the condenser 35, so that the effects of full devolatilization and high-efficiency recovery are achieved.

A second discharge hole 22 penetrating through the second cylinder jacket 5 is further formed in the bottom of the second horizontal reaction kettle 2 away from the second feed hole 21; the second discharge port 22 is connected to the extrusion device 9, and is used for extrusion molding of the devolatilized product, and completing the processes from reaction to devolatilization and then molding.

The following explains the working principle of the reactor for continuous reaction and devolatilization provided by the present invention:

use the utility model provides a pair of during a reactor that is arranged in continuous reaction and takes off a wave, open motor 75 among first horizontal reation kettle 1 and the horizontal reation kettle 2 earlier, make the second (mixing) shaft 72 of being connected with motor 75 drive end rotate around its axis, and then make the fixed cover locate second (mixing) shaft 72 on second gear 74 then follow second (mixing) shaft 72 and rotate, thereby the drive with second gear 74 meshed first gear 73 rotates according to the direction opposite with second gear 74, makes first (mixing) shaft 71 of being connected with first gear 73 rotate according to the direction opposite with second (mixing) shaft 72.

Meanwhile, the corresponding temperatures of the first cylinder jacket 4 and the second cylinder jacket 5 are set, so that the temperatures required for the reaction process and the devolatilization process are arranged in the first reaction kettle 1 and the second reaction kettle 2; after the above setting is completed, the reaction raw material is fed through the first feed port 11.

The utility model discloses an in one of them embodiment, this reaction raw materials includes solvent toluene, catalyst and polymerization monomer, and these raw materials carry out polymerization after getting into first horizontal reation kettle 1 through first feed inlet 11, and in the reaction continuous process that goes on, the reaction glue solution that makes is discharged through first discharge gate 12, gets into second feed inlet 21 through pipeline 6 in, gets into in second horizontal reation kettle 2. And starting the vacuum pump 34 to enable the interior of the condenser 35, the recovery container 33 and the devolatilization pipeline 32 to be in a negative pressure state, so that the toluene volatilized at high temperature is removed through the devolatilization port 31 and enters the condenser 35 through the devolatilization pipeline 32 to be condensed, and the liquid-phase toluene obtained after condensation is collected by the recovery container 33 arranged at the bottom of the condenser 35, thereby completing the continuous devolatilization and toluene recovery processes. Meanwhile, the non-volatile substances in the second horizontal reaction kettle 2 are fully mixed under the action of the double-shaft stirring device 7, enter the extrusion device through the second discharge port 22 and are extruded and molded to obtain a molded colloid, and the process from reaction to devolatilization to molding is completed.

To sum up, the utility model provides a reactor for continuous reaction and devolatilization. The reactor comprises a first horizontal reaction kettle, a second horizontal reaction kettle and a vacuum devolatilization assembly, wherein a first barrel jacket is covered on the outer side of the first horizontal reaction kettle; and double-shaft stirring devices are arranged in the first horizontal reaction kettle and the second horizontal reaction kettle. In this way, the utility model discloses can make reaction material fully mix and react in first horizontal reation kettle to take off the wave in the horizontal reation kettle of the thick result direct input second of output, take off and wave through extrusion device extrusion moulding after accomplishing, realize taking off from reacting and waving to the fashioned process again, make whole production process go on in succession, improve equipment utilization and reaction efficiency. And the reactor has the advantages of simple integral structure, accurate and controllable reaction process, wide application range and higher application value.

The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A reactor for continuous reaction and devolatilization, characterized by: comprises a first horizontal reaction kettle (1) covered with a first cylinder jacket (4) at the outer side, a second horizontal reaction kettle (2) communicated with the first horizontal reaction kettle (1) and covered with a second cylinder jacket (5) at the outer side, and a vacuum devolatilization component (3) connected with the second horizontal reaction kettle (2); and double-shaft stirring devices (7) are arranged in the first horizontal reaction kettle (1) and the second horizontal reaction kettle (2).

2. A reactor for continuous reaction and devolatilization as set forth in claim 1 wherein: the vacuum devolatilization assembly (3) comprises a plurality of devolatilization ports (31) communicated with the top of the second horizontal reaction kettle (2), a condenser (35) for condensing volatiles, a devolatilization pipeline (32) communicated with the devolatilization ports (31) and the condenser (35), a recovery container (33) communicated with the bottom end of the condenser (35), and a vacuum pump (34) connected with the top end of the condenser (35).

3. A reactor for continuous reaction and devolatilization as set forth in claim 1 wherein: a first feed inlet (11) penetrating through the first barrel jacket (4) is formed in one end of the top of the first horizontal reaction kettle (1), and a first discharge outlet (12) penetrating through the first barrel jacket (4) is formed in one end, far away from the first feed inlet (11), of the bottom of the first horizontal reaction kettle (1); the first discharge hole (12) is communicated with a second feed hole (21) which is arranged at the top of the second horizontal reaction kettle (2) and penetrates through the second cylinder jacket (5) through a conveying pipeline (6).

4. A reactor for continuous reaction and devolatilization as set forth in claim 3 wherein: a second discharge hole (22) penetrating through the second cylinder jacket (5) is formed in one end, far away from the second feed hole (21), of the bottom of the second horizontal reaction kettle (2); and an extrusion device (9) is arranged at the second discharge hole (22).

5. A reactor for continuous reaction and devolatilization as set forth in claim 3 wherein: and a terminator input port (23) is arranged at the upper part of the side surface of the second horizontal reaction kettle (2) close to the second feed port (21).

6. A reactor for continuous reaction and devolatilization as set forth in claim 1 wherein: the first barrel jacket (4) is a sectional jacket and comprises a plurality of temperature control jackets (41) arranged at intervals along the length direction of the first horizontal reaction kettle and heat preservation jackets (42) arranged between the adjacent temperature control jackets (41); the temperature control jacket (41) is internally provided with a temperature control medium inlet and a temperature control medium outlet, and the heat preservation jacket (42) is filled with a heat preservation material.

7. A reactor for continuous reaction and devolatilization as set forth in claim 1 wherein: the double-shaft stirring device (7) comprises a double-shaft stirring assembly and a driving assembly for driving the double-shaft stirring assembly; the double-shaft stirring assembly comprises two parallel stirring shafts connected with the driving assembly and a stirring tool arranged on the stirring shafts.

8. A reactor for continuous reaction and devolatilization as set forth in claim 7 wherein: the driving assembly comprises a motor (75) connected with one stirring shaft and two gears which are respectively sleeved on the two stirring shafts and are mutually meshed.

9. A reactor for continuous reaction and devolatilization as set forth in claim 7 wherein: the stirring tools arranged on the two stirring shafts are arranged in a staggered manner; the stirring tool comprises a plurality of groups of stirring elements which are uniformly arranged along the axial direction of the stirring shaft; each group of stirring elements comprises a plurality of stirring rods (76) which are uniformly distributed along the periphery of the stirring shaft and stirring blades (77) arranged at the end parts of the stirring rods.

10. A reactor for continuous reaction and devolatilization as set forth in claim 9 wherein: a plurality of groups of scraping hooks (8) corresponding to the stirring blades (77) are arranged in the first horizontal reaction kettle (1) and the second horizontal reaction kettle (2); every group scrapes hook (8) and comprises two relative scraping hook (8) that set up, what set up relatively leaves the confession between scraping hook (8) stirring vane (77) through the space.

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