CN113856589A

CN113856589A - Polymerization reaction kettle

Info

Publication number: CN113856589A
Application number: CN202111129144.3A
Authority: CN
Inventors: 朱晓群; 聂俊
Original assignee: Jiangsu Jicui Photosensitive Electronic Material Research Institute Co ltd
Current assignee: Jiangsu Jicui Photosensitive Electronic Material Research Institute Co ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2021-12-31
Anticipated expiration: 2041-09-26
Also published as: CN113856589B

Abstract

The invention provides a polymerization reaction kettle, which comprises a kettle body, a stirring structure and a nitrogen filling structure, wherein the stirring structure is arranged on the kettle body; wherein the stirring structure and the nitrogen filling structure are both arranged in the kettle body; the stirring structure is rotationally connected with the kettle body; the nitrogen filling structure comprises an inflation unit for introducing nitrogen into the kettle body and a lifting unit for driving the inflation unit to lift; the aeration unit is arranged on the outer side of the stirring structure in a surrounding manner; one end of the lifting unit is connected with the kettle body, and the other end of the lifting unit is connected with the inflation unit. According to the polymerization reaction kettle provided by the invention, the nitrogen filling structure is arranged to be a lifting structure, so that on one hand, the nitrogen filling structure can fill nitrogen and discharge oxygen at different heights in the polymerization reaction kettle, and the nitrogen filling and oxygen discharging effect is improved, on the other hand, nitrogen sealing is carried out through the nitrogen filling structure, thus the polymerization reaction kettle has two purposes, the reaction stability can be kept, and the structure of the polymerization reaction kettle is simplified.

Description

Polymerization reaction kettle

Technical Field

The invention relates to the technical field of pressure vessels, in particular to a polymerization reaction kettle.

Background

The polymerization reaction kettle is important equipment for preparing a high molecular compound through polymerization reaction; because many polymerization reactions need to be carried out under the condition of isolating oxygen, a nitrogen gas charging port is usually arranged on the polymerization reaction kettle, so that nitrogen gas is conveniently introduced into the polymerization reaction kettle through the nitrogen gas charging port, and the air in the polymerization reaction kettle is discharged, so that the polymerization reactions are carried out under the oxygen-free condition.

In the existing polymerization reaction kettle, a nitrogen gas charging port is usually designed to be a fixed structure, namely the position of charging nitrogen gas is not changeable, so that the nitrogen charging effect is poor.

Disclosure of Invention

The invention solves the problem that the nitrogen filling effect of the existing polymerization reaction kettle is poor due to the unchangeable nitrogen filling position.

In order to solve the problems, the invention provides a polymerization reaction kettle, which comprises a kettle body, a stirring structure and a nitrogen filling structure; wherein the content of the first and second substances,

the stirring structure and the nitrogen filling structure are both arranged in the kettle body;

the stirring structure is rotationally connected with the kettle body;

the nitrogen filling structure comprises an inflation unit for introducing nitrogen into the kettle body and a lifting unit for driving the inflation unit to lift;

the aeration unit is arranged on the outer side of the stirring structure in a surrounding manner;

one end of the lifting unit is connected with the kettle body, and the other end of the lifting unit is connected with the inflation unit.

Optionally, the inflation unit comprises an inflation tube, an annular air supply part, and at least one air outlet part connected to the inner side of the air supply part; the inflation tube is a hose; the air supply part and the air outlet part are provided with communicated cavity structures; one end of the inflation pipe is connected with the cavity of the air supply part, and the other end of the inflation pipe penetrates through the kettle body and is connected with an air source.

Optionally, the inner wall of the kettle body is provided with limit grooves distributed along the vertical direction; the inflation tubes are distributed in the limiting grooves; the inner diameter of the limiting groove is larger than the outer diameter of the inflation tube, and the inner diameter of the limiting groove is smaller than twice of the outer diameter of the inflation tube.

Optionally, the air outlet portion comprises two air outlet pipes, and each air outlet pipe is provided with at least one air outlet hole; the two air outlet pipes are connected with the air supply part, and one ends of the two air outlet pipes, which are far away from the air supply part, are hinged with each other; the two mutually hinged air outlet pipes are of a retractable structure.

Optionally, the air outlet portion includes four air outlet pipes, and each air outlet pipe is provided with at least one air outlet hole; the four air outlet pipes are hinged with each other; the four mutually hinged air outlet pipes form a scissor-shaped retractable structure.

Optionally, an annular chute is arranged on the air supply part, and the air outlet pipe is connected with the air supply part in a sliding manner through the chute; the lifting unit comprises a lifting cylinder and a lifting ring; the air outlet part also comprises a pull rope; the lifting ring is connected with a piston rod of the lifting cylinder; the lifting ring is positioned above the air supply part; one end of the pull rope is connected with the lifting ring, and the other end of the pull rope penetrates through the air supply part and is connected with the air outlet pipe; the air outlet part also comprises a return spring, one end of the return spring is connected with the air outlet pipe, and the other end of the return spring is connected with the air supply part.

Optionally, the air outlet part further comprises a connecting pipe, and the cavity of each air outlet pipe is connected with the cavity of the air supply part through the connecting pipe; the connecting pipe is a hose.

Optionally, the air outlet pipe is a hose.

Optionally, the air outlet part comprises a plurality of air outlet blades, and the plurality of air outlet blades are spliced to form a plate-shaped structure; each air outlet blade comprises a fixed blade fixedly connected with the air supply part and a telescopic blade in sliding connection with the fixed blade; and air outlet holes are formed in the fixed blades and the telescopic blades.

Optionally, the bottom of the kettle body is provided with a limiting table for limiting the air supply part, and the inner diameter of the limiting table is smaller than the outer diameter of the air supply part.

Compared with the prior art, the polymerization reaction kettle provided by the invention has the following advantages:

according to the polymerization reaction kettle provided by the invention, the nitrogen filling structure is arranged to be a lifting structure, so that on one hand, the nitrogen filling structure can fill nitrogen and discharge oxygen at different heights in the polymerization reaction kettle, the nitrogen filling effect is improved, on the other hand, after the reaction is finished, the nitrogen sealing can be carried out on the reaction product through the nitrogen filling structure, the dual purposes of one object are realized, and the structure of the polymerization reaction kettle is simplified.

Drawings

FIG. 1 is a schematic view of a polymerization reactor according to the present invention;

FIG. 2 is a schematic view of a polymerization reactor according to the present invention;

FIG. 3 is a schematic view of an inflation unit according to the present invention;

FIG. 4 is a schematic view of a spacing groove according to the present invention;

FIG. 5 is a schematic view of the structure of an inflation unit according to the present invention;

FIG. 6 is a schematic view of the structure of an inflation unit according to the present invention;

FIG. 7 is a schematic view of the back side of the inflatable unit of the present invention;

FIG. 8 is a schematic view of the back side of the inflatable unit of the present invention;

FIG. 9 is a schematic view of the assembly of the lift ring and the inflation unit of the present invention;

FIG. 10 is an enlarged view of a portion of FIG. 3 at A;

FIG. 11 is a schematic view of the assembly of the lift ring and the inflation unit of the present invention;

FIG. 12 is a simplified assembly of the lift ring and inflation unit of the present invention;

FIG. 13 is a simplified assembly of the lift ring and inflation unit of the present invention;

FIG. 14 is a schematic view of the assembly of the lift ring and inflation unit of the present invention.

Description of reference numerals:

1-kettle body; 11-a limiting groove; 12-a limit table; 13-an inlet pipe orifice; 2-stirring structure; 3-filling nitrogen structure; 31-an inflation unit; 311-a gas-filled tube; 312-a gas supply; 3121-a chute; 3122-a through hole; 313-an air outlet part; 3131-an outlet duct; 3132-a connecting tube; 3133-a pull cord; 3134-a return spring; 3135-stationary leaves; 3136-telescoping leaves; 3137-a slide rail; 32-a lifting unit; 321-a lifting cylinder; 322-lifting ring.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention, and all other embodiments that can be obtained by one skilled in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of protection of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of simplifying the description, and are not intended to indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present invention.

Furthermore, the terms "first" and "second" are used merely to simplify the description and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the first feature being "on" or "under" the first feature may comprise the first feature being in direct contact with the second feature or the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under," "below," and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

The existing polymerization reaction kettle has the defects that the contact area of the filled nitrogen and materials is limited because the position of the filled nitrogen is not changeable, the oxygen in the polymerization reaction kettle is difficult to be completely discharged, and the speed of discharging the oxygen is slow, so that the nitrogen filling effect is poor.

In order to solve the problem of poor nitrogen filling effect caused by the unchangeable nitrogen filling position of the existing polymerization reaction kettle, referring to fig. 1 and fig. 2, the polymerization reaction kettle comprises a kettle body 1, a stirring structure 2 and a nitrogen filling structure 3; wherein, the specific structure of the kettle body 1 is determined according to the requirements of polymerization reaction; because the polymerization reaction kettle provided by the application needs to be filled with nitrogen to exhaust the air in the reaction kettle, the kettle body 1 is provided with an exhaust port (not shown in the figure); the exhaust port can be connected with a corresponding gas recovery or treatment device so as to further treat the exhausted gas according to the reaction in the reaction kettle and avoid environmental pollution; the stirring structure 2 is used for fully stirring the materials in the polymerization reaction kettle so as to ensure the smooth reaction; the nitrogen filling structure 3 is used for filling nitrogen into the polymerization reaction kettle so as to discharge the air in the polymerization reaction kettle, so that the polymerization reaction is carried out under the anaerobic condition; the stirring structure 2 and the nitrogen filling structure 3 are both arranged in the kettle body 1; the stirring structure 2 is rotationally connected with the kettle body 1; the stirring structure 2 can be any structure suitable for stirring materials in a polymerization reaction kettle in the prior art; in order to improve the nitrogen filling effect, the nitrogen filling structure 3 in the present application includes an inflation unit 31 for introducing nitrogen into the kettle body 1, and a lifting unit 32 for driving the inflation unit 31 to lift; because the stirring structure 2 is usually located in the middle of the polymerization reaction kettle, in order to avoid interference with the stirring structure 2 during the lifting process of the aeration unit 31, the aeration unit 31 in the application is arranged around the outer side of the stirring structure 2; one end of the lifting unit 32 is connected with the kettle body 1, and the other end is connected with the inflation unit 31.

In the working process of the polymerization reaction kettle, firstly, the air charging unit 31 is positioned at the lowest position through the lifting unit 32, firstly, nitrogen is charged into the bottom of the polymerization reaction kettle, and air at the bottom of the polymerization reaction kettle is discharged through charging the nitrogen; then the height of the aeration unit 31 is sequentially lifted by the lifting unit 32, so that the aeration unit 31 can be used for filling nitrogen and discharging oxygen at different heights in the polymerization reaction kettle, the discharge amount of oxygen is increased, the oxygen discharging speed is increased, and the nitrogen filling effect is improved. The times of the lifting process can be selected according to the type of the polymerization reaction until the oxygen content in the polymerization reaction kettle is reduced to meet the reaction requirement.

As the polymerization reaction in the polymerization reaction kettle is carried out, the viscosity of materials in the polymerization reaction kettle is generally increased; the nitrogen filling structure 3 becomes a lifting structure by matching the lifting unit 32 with the gas filling unit 31, so that the height of the gas filling unit 32 can be changed along with the change of the properties of reaction materials in the polymerization reaction process, and the nitrogen filling effect is improved; and when the viscosity of the material is high, the inflation unit 31 can be lifted to be above the liquid level of the reaction material through the lifting unit 32, so that the material with high viscosity is prevented from entering the air outlet of the inflation unit 31 to cause blockage.

In addition, after the reaction process or the reaction is finished, referring to fig. 2, the gas filling unit 31 can be lifted above the liquid level of the material through the lifting unit 32, and nitrogen is further filled on the liquid level for nitrogen sealing, so that the nitrogen filling structure 3 has the functions of filling nitrogen, discharging oxygen and filling nitrogen for sealing, the dual purposes of one object can be realized, the reaction stability is improved, and the structure of the polymerization reaction kettle is simplified.

Moreover, because the density of the nitrogen is smaller than that of the air, the problem of upward diffusion of the nitrogen is easy to occur when the nitrogen is used for sealing, and the air sealing effect is influenced; through the polymerization reaction kettle that this application provided, the reaction is ended, promotes the unit 31 of aerifing through lift unit 32 after to the liquid level of material, still can change the air supply, carries out the atmoseal through aerifing inert gas such as the great argon of unit 31 of aerifing into density in to the cauldron body 1 to improve the atmoseal effect.

According to the polymerization reaction kettle provided by the invention, the nitrogen filling structure 3 is arranged to be a lifting structure, so that the nitrogen filling structure 3 can fill nitrogen and discharge oxygen at different heights in the polymerization reaction kettle, the nitrogen filling effect is improved, and after the reaction is finished, the nitrogen sealing can be performed on the reaction product through the nitrogen filling structure 3, so that the two purposes of one product are realized, and the structure of the polymerization reaction kettle is simplified.

Referring to fig. 3 and 5, the inflation unit 31 of the present application includes an inflation tube 311, a ring-shaped air supply part 312, and at least one air outlet part 313 connected to an inner side of the air supply part 312; the specific number of the air outlet portions 313 is determined according to the requirement; the gas filling pipe 311 is used for conveying nitrogen provided by a gas source to the gas filling unit 31 in the kettle body 1; because the inflation unit 31 in the present application is a lifting structure, in order to make the inflation tube 311 suitable for the inflation units 31 located at different heights, the inflation tube 311 in the present application is preferably a hose, and the specific material of the hose can be selected according to the conditions of the polymerization reaction and the materials for the polymerization reaction, the inflation tube 311 in the present application is further preferably a bellows, and the material of the air supply part 312 is preferably stainless steel; the air supply part 312 and the air outlet part 313 have communicated cavity structures; one end of the gas-filled pipe 311 is connected with the cavity of the gas-feeding part 312, and the other end passes through the kettle body 1 to be connected with a gas source, so that nitrogen provided by the gas source sequentially passes through the gas-filled pipe 311, the cavity of the gas-feeding part 312 and the cavity of the gas-discharging part 313 and then enters the kettle body 1.

Specifically, the sidewall of the preferred cauldron body 1 of this application is provided with the pipe inlet 13 that matches with gas tube 311, and gas tube 311 gets into cauldron body 1 through this pipe inlet 13; in order to ensure the smooth proceeding of the polymerization reaction, the pipe inlet 13 needs to be sealed; the sealing treatment method is not particularly limited in the present application.

This mouth of pipe 13 can set up in the arbitrary high position of cauldron body 1 lateral wall, and this application prefers this mouth of pipe 13 and sets up in the top of cauldron body 1 lateral wall to make after the reaction is accomplished, gas tube 311 can promote to the liquid level above along with gas cell 31, avoid influencing the quality of product because of gas tube 311 soaks in the product.

In order to ensure that the inflation tube 311 can lift up and down along with the inflation unit 31, referring to fig. 4, it is preferable that the inner wall of the kettle body 1 is provided with limit grooves 11 distributed along the vertical direction; the gas tube 311 is distributed in the limiting groove 11, so that in the lifting process of the gas cell 31, the gas tube 311 can lift along the limiting groove 11, thereby ensuring that the gas cell 31 at any height can be conveyed with nitrogen gas through the gas tube 311.

Further, on the one hand, in order to ensure that the limiting groove 11 can limit the inflation tube 311 in the lifting process, and on the other hand, in order to prevent the inflation tube 311 from bending in the lifting process, the inner diameter of the limiting groove 11 is preferably larger than the outer diameter of the inflation tube 311, and the inner diameter of the limiting groove 11 is smaller than two times of the outer diameter of the inflation tube 311.

Further, in the present application, the air outlet portion 313 includes two air outlet pipes 3131, each air outlet pipe 3131 is provided with at least one air outlet hole (not shown), and the number of the air outlet holes on each air outlet pipe 3131 is determined according to requirements; in the present application, it is preferable that the outlet hole is provided at the inner side of the outlet duct 3131, i.e., at a side of the outlet duct 3131 facing the center of the autoclave body 1; two air outlet pipes 3131 are both connected to the air supply part 312, and one ends of the two air outlet pipes 3131 far away from the air supply part 312 are hinged to each other; two air outlet pipes 3131 hinged to each other are in a retractable structure.

The specific material of the air outlet pipe 3131 can be determined according to the properties of the materials in the polymerization reaction kettle; in the application, the material of the air outlet pipe 3131 is preferably stainless steel; in the present application, it is preferable that the two outlet pipes 3131 have ends far from the air supply part 312 hinged to each other by a pin.

In order to improve the nitrogen charging effect, it is preferable that the two gas outlet pipes 3131 hinged to each other are of a retractable structure, so that when the gas charging unit 31 is located at the bottom of the kettle 1, the height of the gas outlet unit 31 is lower than that of the stirring structure 2, as shown in fig. 3 and 5, the gas outlet pipes 3131 hinged to each other can be in a state of extending to the center of the kettle 1 through the retractable structure, so as to expand the range of charging nitrogen gas and improve the nitrogen charging effect; meanwhile, in the process of lifting the gas charging unit 31, in order to avoid interference with the stirring structure 2, as shown in fig. 6, the gas outlet pipes 3131 hinged to each other are in a contracted state through the telescopic structure, that is, are contracted in a direction away from the center of the kettle body 1, so that the minimum inner diameter of a space formed by the gas outlet parts 313 is increased, and then abdicating the stirring structure 2 is realized in the lifting process, thereby avoiding interference.

In order to improve the nitrogen charging effect, another structure form of the air outlet portion 313 in the present application is, as shown in fig. 11 and 12, that the air outlet portion 313 includes four air outlet pipes 3131, and each air outlet pipe 3131 is provided with at least one air outlet hole; four air outlet pipes 3131 are hinged with each other; four air outlet pipes 3131 hinged to each other form a scissor-like retractable structure.

By designing the four outlet pipes 3131 as a scissor-like retractable structure, the nitrogen charging area when the outlet pipe 3131 is in an extended state can be increased, thereby enhancing the nitrogen charging effect.

In order to achieve the extension and contraction, as shown in fig. 7 to 10, the air supply part 312 of the present application is provided with an annular slide groove 3121, and preferably, the slide groove 3121 is provided on the bottom surface of the air supply part 312; the air outlet pipe 3131 is slidably connected to the air supply part 312 through the sliding groove 3121; the lifting unit 32 includes a lifting cylinder 321 and a lifting ring 322; the air outlet part 313 further comprises a pull rope 3133; the lifting ring 322 is connected with a piston rod of the lifting cylinder 321; the lifting ring 322 is positioned above the air supply part 312; in the present application, preferably, the circle center of the lifting ring 322 and the circle center of the air feeding part 312 are both located on the central axis of the kettle body 1; one end of the pull rope 3133 is connected to the lifting ring 322, and the other end is connected to the air outlet pipe 3131 through the air supply part 312; in the present application, it is preferable that the air supplying part 312 is provided with a through hole 3122 adapted to the pulling rope 3133, the pulling rope 3133 passes through the through hole 3122 and is connected to the air outlet duct 3131, and it is preferable that the pulling rope 3133 is connected to the hinge of the two air outlet ducts 3131.

During the lifting process of the pneumatic unit 31 by the lifting unit 32, the lifting ring 322 applies an upward pulling force to the pulling rope 3133, the pulling rope 3133 further applies a pulling force in a direction away from the center of the kettle body 1 to the two outlet pipes 3131 hinged to each other, under the pulling force, one ends of the two outlet pipes 3131 remote from the air supply part 312 rotate with each other and move in a direction close to the air supply part 312, and at the same time, one ends of the two outlet pipes 3131 connected to the air supply part 312 slide along the sliding groove 3121, and during the sliding process, a distance between the ends of the two outlet pipes 3131 hinged to each other and connected to the air supply part 312 increases, so that the two outlet pipes 3131 hinged to each other contract in a direction close to the air supply part 312, so that an inner diameter of a space formed by the plurality of air supply parts 313 increases, so that the inner diameter is greater than a maximum outer diameter of the stirring structure 2, thereby ensuring that during the lifting process of the pneumatic unit 31, the gas outlet 313 does not interfere with the stirring structure 2.

When the pulling rope 3133 pulls the air outlet duct 3131 to the outermost side, that is, after the inner diameter of the space formed by the air outlet portions 313 is increased to the maximum, the lifting ring 322 continues to apply a pulling force to the pulling rope 3133, the pulling rope 3133 pulls the air outlet duct 3131 and the air outlet portion 312 to lift upwards, so that the air inflation unit 31 is lifted in the air outlet duct 3131 in a contracted state, and interference of the stirring structure 2 is avoided in the lifting process.

The pull cord 3133 is preferably a steel cord.

In order to facilitate the return of the outlet duct 3131 after the contraction, as shown in fig. 3 and 10, it is preferable that the outlet duct 313 further includes a return spring 3134, and it is preferable that one end of the return spring 3134 is connected to the outlet duct 3131 and the other end is connected to the air supply part 312, so that during the lifting of the air-inflating unit 31 by the lifting unit 321, the two outlet ducts 3131 hinged to each other move in a direction close to the air supply part 312, and the return spring 3134 contracts and deforms; after the lifting unit 321 stops lifting, the pulling force of the lifting ring 322 on the pull rope 3133 is reduced, the return spring 3134 returns, and at the same time, the two air outlet pipes 3131 hinged to each other are driven to move toward the center of the air supply part 312, so that the air outlet pipes 3131 return to the extended state.

Further, in the present application, it is preferable that the air outlet part 313 further includes a connection pipe 3132, and a cavity of each air outlet pipe 3131 is connected to the cavity of the air supply part 312 through the connection pipe 3132; to facilitate the extension and contraction of the air outlet pipe 3131, it is preferable that the connection pipe 3132 is a flexible pipe, and it is further preferable that the connection pipe 3132 is a corrugated pipe.

The application also provides another implementation mode of the contraction structure of the air outlet pipe 3131; in this implementation, it is preferable that the outlet 3131 is a flexible tube, and it is preferable that the outlet 3131 is a corrugated tube.

Specifically, in this implementation, the sliding groove 3121 does not need to be provided on the air feeding portion 312, that is, two air outlet pipes 3131 hinged to each other are fixedly connected to the air feeding portion 312, and other structures are the same as those described above.

In the process of lifting the air charging unit 31 by the lifting unit 32, the pulling rope 3133 stretches the hinged portion of the two air outlet pipes 3131, so that the two air outlet pipes 3133 are bent and deformed and move in the direction close to the air supply portion 312, thereby enlarging the space between the air outlet portions 313 and avoiding interference with the stirring structure 2 in the prompting process.

Referring to fig. 13 and 14, the polymerization reactor provided by the present application can further perform nitrogen charging and oxygen discharging operations as follows: the air outlet part 313 comprises a plurality of air outlet blades which are spliced to form a plate-shaped structure; each air outlet blade includes a fixed blade 3135 fixedly connected to the air supply part 312, and a retractable blade 3136 slidably connected to the fixed blade 3135; the fixed blade 3135 and the retractable blade 3136 are both provided with air outlets.

Specifically, each air outlet blade is preferably of the same triangular structure, and a plurality of triangular structures are spliced to form a flat structure matched with the section of the kettle body 1, so that the area of filling nitrogen is increased; moreover, each air outlet sheet is provided with a cavity structure, and the cavity structure is communicated with the cavity structure of the air supply part 312 so as to facilitate conveying of gases such as nitrogen; a plurality of air outlet holes are arranged above each air outlet blade so as to discharge air into the kettle body 1 through the air outlet holes.

Further, each of the air outlet blades in the present application includes a fixed blade 3135 fixedly connected to the air supply part 312, and a retractable blade 3136 slidably connected to the fixed blade 3135, so that when the air outlet part 313 is located at the bottom of the autoclave body 1, as shown in fig. 13, the retractable blade 3136 is in an extended state, so that the air outlet blades can be distributed over the entire cross section of the bottom of the autoclave body 1, thereby improving the nitrogen charging and oxygen discharging effects and increasing the efficiency; after the reaction process or the reaction is finished, referring to fig. 14, the retractable blades 3136 are in a retracted state, so that a yielding hole with an inner diameter larger than the outer diameter of the stirring structure 2 is formed in the middle of each gas outlet blade, and the gas filling unit 31 can be lifted above the liquid level or at another designated height by the lifting unit 32.

To achieve the sliding connection of the telescopic blades 3136 with the fixed blades 3135, it is preferable that the telescopic blades 3136 have a height lower than that of the fixed blades 3135, the telescopic blades 3136 are connected with the fixed blades 3135 through sliding rails 3137, and the telescopic blades 3136 are connected with the lifting ring 322 through a pulling rope 3133 and a return spring 3134; in the process of lifting the air outlet blade by the lifting unit 32, the stretching rope 3133 and the return spring 3134 drive the retractable blade 3136 to retract, which is the same as the principle of the process of retracting the air outlet tube 3131, and is not described herein again.

Since the fixed vane 3135 is fixedly connected to the air supply part 312, it is preferable that the cavity structure of the fixed vane 3135 directly communicates with the cavity structure of the air supply part 312; since the retractable blades 3136 are slidably connected to the fixed blades 3135, the cavity structure of the retractable blades 3136 is preferably connected to the cavity structure of the air supply part 312 (not shown) through a connection pipe 3132, and the connection pipe 3132 is preferably a corrugated pipe, similar to the above-mentioned solution.

Further, in order to ensure the nitrogen charging effect, in the present application, it is preferable that the bottom of the vessel body 1 is provided with a position-limiting table 12 for limiting the gas supply portion 312, an inner diameter of the position-limiting table 12 is smaller than an outer diameter of the gas supply portion 312, and a height of the position-limiting table 12 is preferably lower than a lowest end of the stirring structure 2, so that the lifting ring 322 continues to descend after the gas supply portion 312 contacts the position-limiting table 12 during a descent of the gas supply portion 312, the descending distance is determined according to a length of the pulling rope 3133, and a lowest position of the lifting ring 322 is in contact with the gas supply portion 312; after the lifting ring 322 stops descending, because the air feeding portion 312 is placed on the stop block 12, the pulling force of the pulling rope 3133 on the air outlet pipe 3131 is reduced, so that the air outlet pipe 3133 is restored under the action of the restoring spring 3134 and moves and extends in the direction close to the center of the air feeding portion 312, which is convenient for increasing the area for charging nitrogen gas and improving the nitrogen charging effect.

According to the polymerization reaction kettle provided by the invention, in the lifting process of the nitrogen filling structure 3, the contraction of the air outlet pipe 3131 is realized, and the interference of the air filling unit 31 and the stirring structure 2 in the lifting process is avoided; when the air supply part 312 is located at the lowest height, that is, lower than the stirring structure 2, the outlet duct 3131 extends in a direction close to the center of the air supply part 312, so that the outlet duct 3131 is filled with nitrogen in the extended state, thereby improving the effect of filling nitrogen.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.

Claims

1. A polymerization reaction kettle is characterized by comprising a kettle body (1), a stirring structure (2) and a nitrogen filling structure (3); wherein the content of the first and second substances,

the stirring structure (2) and the nitrogen filling structure (3) are both arranged in the kettle body (1);

the stirring structure (2) is rotationally connected with the kettle body (1);

the nitrogen filling structure (3) comprises an inflating unit (31) for introducing nitrogen into the kettle body (1) and a lifting unit (32) for driving the inflating unit (31) to lift;

the aeration unit (31) is arranged on the outer side of the stirring structure (2) in a surrounding manner;

one end of the lifting unit (32) is connected with the kettle body (1), and the other end of the lifting unit is connected with the inflation unit (31).

2. The polymerization reactor according to claim 1, wherein the aeration unit (31) comprises an aeration pipe (311), a ring-shaped gas supply part (312), and at least one gas outlet part (313) connected to an inner side of the gas supply part (312); the inflation tube (311) is a hose; the air supply part (312) and the air outlet part (313) are provided with communicated cavity structures; one end of the gas-filled pipe (311) is connected with the cavity of the gas supply part (312), and the other end of the gas-filled pipe penetrates through the kettle body (1) to be connected with a gas source.

3. The polymerization reaction kettle according to claim 2, wherein the inner wall of the kettle body (1) is provided with limit grooves (11) distributed along the vertical direction; the inflation tubes (311) are distributed in the limiting groove (11); the inner diameter of the limiting groove (11) is larger than the outer diameter of the inflation tube (311), and the inner diameter of the limiting groove (11) is smaller than twice of the outer diameter of the inflation tube (311).

4. The polymerization reactor according to claim 2, wherein the gas outlet portion (313) comprises two gas outlet pipes (3131), and each gas outlet pipe (3131) is provided with at least one gas outlet hole; the two air outlet pipes (3131) are connected with the air supply part (312), and one ends of the two air outlet pipes (3131) far away from the air supply part (312) are hinged with each other; the two air outlet pipes (3131) which are hinged with each other are of a retractable structure.

5. The polymerization reactor according to claim 2, wherein the gas outlet portion (313) comprises four gas outlet pipes (3131), and each gas outlet pipe (3131) is provided with at least one gas outlet hole; the four air outlet pipes (3131) are hinged with each other; the four air outlet pipes (3131) which are hinged with each other form a scissor-shaped retractable structure.

6. The polymerization reactor according to claim 4 or 5, wherein the gas supply portion (312) is provided with an annular sliding groove (3121), and the gas outlet pipe (3131) is slidably connected to the gas supply portion (312) through the sliding groove (3121); the lifting unit (32) comprises a lifting cylinder (321) and a lifting ring (322); the air outlet part (313) further comprises a pull rope (3133); the lifting ring (322) is connected with a piston rod of the lifting cylinder (321); the lifting ring (322) is positioned above the air supply part (312); one end of the pull rope (3133) is connected with the lifting ring (322), and the other end of the pull rope passes through the air supply part (312) and is connected with the air outlet pipe (3131); the air outlet part (313) further comprises a return spring (3134), one end of the return spring (3134) is connected with the air outlet pipe (3131), and the other end of the return spring (3134) is connected with the air supply part (312).

7. The polymerization reactor according to claim 6, wherein the gas outlet part (313) further comprises a connection pipe (3132), and a cavity of each gas outlet pipe (3131) is connected to the cavity of the gas supply part (312) through the connection pipe (3132); the connecting pipe (3132) is a hose.

8. The polymerizer vessel of claim 6, wherein the gas outlet tube (3131) is a flexible tube.

9. The polymerization reactor according to claim 2, wherein the gas outlet portion (313) comprises a plurality of gas outlet blades, and the plurality of gas outlet blades are spliced to form a plate-shaped structure; each air outlet blade comprises a fixed blade (3135) fixedly connected with the air supply part (312) and a telescopic blade (3136) in sliding connection with the fixed blade (3135); the fixed blade (3135) and the telescopic blade (3136) are provided with air outlets.

10. The polymerization reactor according to claim 2, wherein a limiting table (12) for limiting the gas supply part (312) is provided at the bottom of the reactor body (1), and an inner diameter of the limiting table (12) is smaller than an outer diameter of the gas supply part (312).