A reaction device for producing an acrylate polymer high molecular material additive

Abstract

The application discloses a kind of acrylate polymer macromolecular material auxiliary production reaction devices, including pre-emulsifier and polymerization reactor pre-emulsifier bottom is communicated with the top of polymerization reactor by pipeline, first solenoid valve is arranged on the pipeline between pre-emulsifier and polymerization reactor, several heating plates are evenly arranged on the inner wall of pre-emulsifier and polymerization reactor, stirring device is arranged in pre-emulsifier and polymerization reactor, opening is arranged in the lower part of polymerization reactor, barrier net is arranged towards one end in polymerization reactor inside opening, sealing device is arranged in opening, and the bottom of polymerization reactor is communicated with discharge pipe.In the application, only pre-emulsifier and polymerization reactor can complete pre-emulsification, polymerization, demulsification, filtration separation and drying operation, and the final solid discharge only needs to be crushed to obtain the finished product.Compared with the existing production process, the demulsification kettle, filtration equipment, washing kettle and drying device are saved, the production equipment and production space are saved, and the production cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of acrylate polymer additives, in particular, it is a kind of reaction device for producing acrylate polymer high polymer material additives. BACKGROUND

[0002] The acrylate polymer additive can be used for the production of different kinds of high polymer materials, especially for batch plate and profile extrusion, injection molding and hard calendering, and can be used as impact modifier. The conventional operation for producing acrylate polymer additive at present is that part of emulsifier, initiator and deionized water are added into a pre-emulsification kettle, all are dissolved, then mixed acrylate monomer mixture is added for pre-emulsification, then the remaining emulsifier and deionized water are added into a polymerization kettle, then the pre-emulsified mixture is added into the polymerization kettle for further polymerization operation, after the polymerization operation is completed, the obtained emulsion is moved into a demulsification kettle for demulsification operation, after demulsification, filtration is carried out, then the obtained wet solid is sent into a washing kettle for washing 2-4 times with deionized water, then filtration is carried out, the obtained wet solid is dried and crushed to obtain acrylate polymer additive, so the existing operation needs to use pre-emulsification kettle, polymerization kettle, demulsification kettle, filtration equipment, washing kettle, drying device and crushing device. SUMMARY

[0003] The present application provides a kind of reaction device for producing acrylate polymer high polymer material additives to solve the defects in the prior art.

[0004] The present application is realized by the following technical solutions:

[0005] A kind of reaction device for producing acrylate polymer high polymer material additives, including pre-emulsifier and polymerization reactor, the top of the pre-emulsifier is communicated with first emulsifier adding pipe, initiator adding pipe, first deionized water adding pipe and mixed acrylate monomer mixture adding pipe, the bottom of the pre-emulsifier is communicated with the top of polymerization reactor by pipeline, first electromagnetic valve is arranged on the pipeline between the pre-emulsifier and polymerization reactor, the top of the polymerization reactor is communicated with second emulsifier adding pipe, second deionized water adding pipe and demulsifier adding pipe, a plurality of heating plates are evenly arranged on the inner wall of the pre-emulsifier and polymerization reactor, stirring device is arranged in the pre-emulsifier and polymerization reactor, opening is arranged in the lower part of the polymerization reactor, barrier net is arranged at one end of the polymerization reactor facing the opening, the end of the opening away from the barrier net is communicated with buffer tank, the bottom of the buffer tank is communicated with liquid discharge pipe, sealing device is arranged in the opening, the bottom of the polymerization reactor is communicated with discharge pipe, second electromagnetic valve and spiral discharge conveyor are arranged on the discharge pipe.

[0006] The utility model discloses a reaction device for producing acrylate polymer high molecular material additive, the sealing device includes sealing plate, the sealing plate can cover the opening completely, the corresponding position of the opening top is equipped with the placement groove, the first motor is arranged in the placement groove top, the output shaft of first motor is connected with one end of screw rod, and the other end of screw rod is connected with the screw groove of the top of sealing plate.

[0007] The utility model discloses a reaction device for producing acrylate polymer high molecular material additive, the opening both sides and bottom surface with sealing plate corresponding position are equipped with the recess, the sealing plate can be inserted with the recess, and the corresponding position of sealing plate and recess is equipped with sealing strip.

[0008] The utility model discloses a reaction device for producing acrylate polymer high molecular material additive, the placement groove is equipped with the baffle at the communication end of opening, the baffle is equipped with the through groove, the sealing plate can pass through the through groove, the rubber sleeve of inverted conical table shape is arranged at the corresponding position of the outer periphery of sealing plate and through groove, the rubber sleeve can be inserted with the through groove, and the top of rubber sleeve is larger than the length and width of through groove.

[0009] The utility model discloses a reaction device for producing acrylate polymer high molecular material additive, the top of pre-emulsifier is connected with nitrogen inlet pipe, the one-way valve is arranged on the nitrogen inlet pipe, the bottom of pre-emulsifier is connected with exhaust pipe, the third electromagnetic valve is arranged on the first emulsifier adding pipe, initiator adding pipe, first deionized water adding pipe, mixed acrylate monomer mixed solution adding pipe and exhaust pipe.

[0010] The utility model discloses a reaction device for producing acrylate polymer high molecular material additive, the pipeline between pre-emulsifier and polymerization reactor is connected with the horizontal pipe arranged in the upper portion of polymerization reactor, a plurality of nozzles are arranged in the lower portion of horizontal pipe, and the fourth electromagnetic valve is arranged on the pipeline connecting nozzle and horizontal pipe.

[0011] The utility model discloses a reaction device for producing acrylate polymer high molecular material additive, the liquid pump is arranged on the pipeline between pre-emulsifier and polymerization reactor.

[0012] The utility model discloses a reaction device for producing acrylate polymer high molecular material additive, the top of polymerization reactor is connected with negative pressure pipe, the fifth electromagnetic valve is arranged on the second emulsifier adding pipe, second deionized water adding pipe, demulsifier adding pipe and negative pressure pipe.

[0013] The reaction device for producing an acrylate polymer high molecular material aid, the stirring device comprises a second motor, the second motor is arranged in the middle of one side of the pre-emulsifier or the polymerization reactor, the output shaft of the second motor is fixedly connected with one end of a rotating rod, the other end of the rotating rod is rotatably connected with the middle of the other side of the pre-emulsifier or the polymerization reactor through a bearing, and a plurality of stirring blades are arranged on the rotating rod.

[0014] The advantage of the present application is that: in the present application, only the pre-emulsifier and the polymerization reactor are needed to complete the operations of pre-emulsification, polymerization, demulsification, filtration separation and drying, and the final solid discharge only needs to be crushed to obtain the finished product, compared with the existing production process, the demulsification kettle, the filtration equipment, the washing kettle and the drying device are saved, the production equipment and the production space are saved, thereby effectively reducing the production cost, and the device structure of the present application is relatively simple, convenient to operate and easy to use. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0016] Figure 1 is a structural schematic diagram of the present application;

[0017] Figure 2 is Figure 1 a partial enlarged view of I part of the present application;

[0018] Figure 3 is Figure 1 a partial enlarged view of II part of the present application;

[0019] Figure 4 is Figure 1 a partial enlarged view of III part of the present application;

[0020] Figure 5 is Figure 1 a partial enlarged view of IV part of the present application.

[0021] 1, pre-emulsifier; 2, polymerization reactor; 3, first emulsifier adding pipe; 4, initiator adding pipe; 5, first deionized water adding pipe; 6, mixed acrylate monomer mixed solution adding pipe; 7, first electromagnetic valve; 8, second emulsifier adding pipe; 9, second deionized water adding pipe; 10, demulsifier adding pipe; 11, heating plate; 12, opening; 13, barrier net; 14, buffer tank; 15, liquid discharge pipe; 16, discharge pipe; 17, second electromagnetic valve; 18, spiral discharge conveyor; 19, sealing plate; 20, placing groove; 21, first motor; 22, screw; 23, screw groove; 24, groove; 25, sealing strip; 26, baffle; 27, through groove; 28, rubber sleeve; 29, nitrogen inlet pipe; 30, one-way valve; 31, exhaust pipe; 32, third electromagnetic valve; 33, cross pipe; 34, spray head; 35, fourth electromagnetic valve; 36, liquid pump; 37, negative pressure pipe; 38, fifth electromagnetic valve; 39, second motor; 40, rotating rod; 41, bearing; 42, stirring blade. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] The utility model provides an acrylic ester polymer macromolecular material auxiliary production reaction device, including pre -emulsifier 1 and polymerization reactor 2, pre -emulsifier 1 top with first emulsifier adding pipe 3, initiator adding pipe 4, first deionized water adding pipe 5 and mixed acrylic ester monomer mixed solution adding pipe 6 intercommunication, pre -emulsifier 1 bottom is communicated with the top of polymerization reactor 2 through pipeline, first solenoid valve 7 is set on the pipeline between pre -emulsifier 1 and polymerization reactor 2, polymerization reactor 2 top with second emulsifier adding pipe 8, second deionized water adding pipe 9 and demulsifier adding pipe 10, pre -emulsifier 1 and polymerization reactor 2 inner wall all balance sets up a number of heating plate 11, pre -emulsifier 1 and polymerization reactor 2 are provided with stirring device, the lower part of polymerization reactor 2 is provided with opening 12, the opening 12 is towards polymerization reactor 2 and is provided with barrier net 13 in one end, the opening 12 is away from the one end of barrier net 13 and is communicated with buffer tank 14, the bottom of buffer tank 14 is communicated with liquid discharge pipe 15, the opening 12 is provided with sealing device, the bottom of polymerization reactor 2 is communicated with discharge pipe 16, second solenoid valve 17 and spiral discharge conveyor 18 are set up on discharge pipe 16.The present application uses the first emulsifier adding pipe 3, the initiator adding pipe 4, the first deionized water adding pipe 5 and the mixed acrylic ester monomer mixed solution adding pipe 6 to add corresponding solutions to the pre-emulsifier 1 respectively, wherein the emulsifier and the initiator are dissolved first and then added to the solution, the pre-emulsification process is heated by the heating plate 11, and the stirring device is used for stirring to accelerate the dissolution and pre-emulsification, after the pre-emulsification is completed, the polymerization reactor 2 adds the emulsifier and the deionized water through the second emulsifier adding pipe 8 and the second deionized water adding pipe 9, and the temperature is raised by the heating plate 11, the first electromagnetic valve 7 is opened, and the opening degree of the first electromagnetic valve 7 is controlled, so that the pre-emulsified solution is slowly added to the polymerization reactor 2 for polymerization, and the stirring device is opened at the same time to accelerate the polymerization reaction, after the addition is completed, the first electromagnetic valve 7 is closed, and then the polymerization reaction is continuously carried out, after the polymerization is completed, the heating is stopped, and the temperature is lowered to room temperature, the cooling device can be used to accelerate the cooling, the stirring device continues to stir to accelerate the cooling, after the cooling is completed, the demulsifier is added through the demulsifier adding pipe 10, when the demulsifier is solid, the demulsifier solution is added after the demulsifier is dissolved in deionized water, the stirring device continues to stir to accelerate the demulsification, after the demulsification is completed, the stirring device is closed, the sealing device is opened, the solvent is discharged from the discharge pipe 15 through the opening 12 and the buffer tank 14 and finally sent into the corresponding tank body for recycling or sent into the wastewater pool, the blocking net 13 can effectively block the acrylic ester polymer obtained after the demulsification in the polymerization reactor 2, and the buffer tank 14 can effectively buffer when the solvent is discharged, so that the blocking net 13 is not subjected to great impact, and normal use of the blocking net 13 is ensured; after the solvent is discharged, the sealing device is closed, then deionized water is added through the second deionized water adding pipe 9 for washing operation, then the stirring device is opened to stir to accelerate the washing operation, after the washing is completed, the stirring device is closed, the sealing device is opened, and the washing liquid is discharged, after the discharge is completed, the sealing device is closed, the above washing operation is repeated, and the subsequent each time the washing water is detected until the washing water detection reaches the standard, after the last time the washing water is discharged, the sealing device is closed, the heating plate 11 is opened to dry the acrylic ester polymer after the washing, and the stirring device is opened, which can accelerate the drying and effectively avoid the acrylic ester polymer from being hardened after the drying, so that the discharge is affected, after the drying is completed, the heating plate 11 and the stirring device are closed, then the second electromagnetic valve 17 and the spiral discharge conveyor 18 are opened, so that the acrylic ester polymer after the drying is conveniently output from the polymerization reactor 2 through the discharge pipe 16, and then the crushing operation is carried out to obtain the acrylic ester polymer high-molecular organic additive finished product.

[0024] Specifically, the sealing device comprises a sealing plate 19 capable of completely covering the opening 12, a placement groove 20 is formed at the corresponding position of the top of the sealing plate 19, a first motor 21 is arranged at the top of the placement groove 20, the first motor 21 is a corrosion-resistant sealed motor capable of being used underwater, the output shaft of the first motor 21 is connected to one end of a screw rod 22, the other end of the screw rod 22 is threadedly connected with a screw groove 23 formed at the top of the sealing plate 19. The sealing plate 19 can completely cover the opening 12, and the screw rod 22 can be driven to rotate by the first motor 21, so that the sealing plate 19 can be conveniently lifted, and the number of the first motor 21 and the screw rod 22 can be selected according to the size of the sealing plate 19, which is convenient to use.

[0025] Specifically, since the sealing plate 19 is in hard contact with the inner wall of the opening 12, the sealing performance is poor. In order to overcome the above problems, a groove 24 is formed at the corresponding position of the sealing plate 19 on the two side surfaces and the bottom surface of the opening 12, the sealing plate 19 can be inserted and matched with the groove 24, and a sealing strip 25 is arranged at the corresponding position of the sealing plate 19 and the groove 24. The sealing plate 19 can be inserted and matched with the groove 24 arranged on the two side surfaces and the bottom surface of the opening 12, and the sealing strip 25 is arranged on the sealing plate 19, so that the sealing performance of the sealing plate 19 after being placed down can be effectively improved through the sealing strip 25 when the sealing plate 19 is inserted and matched with the groove 24, and the sealing degree in the polymerization reactor 2 when the sealing plate 19 is placed down is ensured, and the normal operation of the polymerization, demulsification and washing is ensured.

[0026] More specifically, since there is a gap between the sealing plate 19 and the placement groove 20, solvent and washing water may flow back into the placement groove 20 during sealing, so that the screw rod 22 is soaked in the solvent and washing water for a long time, which may cause the screw rod 22 to be corroded and rusted, so that it cannot be normally used. In order to overcome the above problems, a baffle 26 is arranged at the communication end of the placement groove 20 and the opening 12, a through groove 27 is formed in the baffle 26, the sealing plate 19 can pass through the through groove 27, a rubber sleeve 28 in the shape of an inverted conical table is arranged at the outer periphery of the sealing plate 19 and the through groove 27, the rubber sleeve 28 can be inserted and matched with the through groove 27, and the top end of the rubber sleeve 28 is longer and wider than the through groove 27. In the present application, the rubber sleeve 28 and the through groove 27 are inserted and matched after the sealing plate 19 is placed down, so that the bottom end of the placement groove 20 can be sealed after the sealing plate 19 is placed down, thereby avoiding the phenomenon that the screw rod 22 is corroded and rusted due to being soaked in the solvent and washing water for a long time, and ensuring that the screw rod 22 can be used stably for a long time.

[0027] More specifically, since the pre-emulsification operation needs to be carried out in a nitrogen environment when the reaction is introduced, but the existing operation is to introduce nitrogen after adding various solutions to carry out air exhaust operation, since the density of nitrogen is smaller than that of air, so after the nitrogen is introduced, it will stay in the upper part of the pre-emulsifier 1, the air exhaust effect is poor, thereby affecting the reaction process, in order to overcome the above problems, the top of the pre-emulsifier 1 is communicated with the nitrogen inlet pipe 29, the one-way valve 30 is arranged on the nitrogen inlet pipe 29, the bottom of the pre-emulsifier 1 is communicated with the exhaust pipe 31, the first emulsifier adding pipe 3, the initiator adding pipe 4, the first deionized water adding pipe 5, the mixed acrylate monomer mixed solution adding pipe 6 and the exhaust pipe 31 are provided with the third electromagnetic valve 32. In the present application, before the emulsifier, initiator, deionized water and mixed acrylate monomer mixed solution are introduced, nitrogen is introduced through the nitrogen inlet pipe 29, at this time, the first emulsifier adding pipe 3, the initiator adding pipe 4, the first deionized water adding pipe 5 and the mixed acrylate monomer mixed solution adding pipe 6 are filled with liquid to the corresponding third electromagnetic valve 32, at this time, the third electromagnetic valve 32 of the above pipeline is in the closed state, then the third electromagnetic valve 32 on the exhaust pipe 31 is opened, since the density of nitrogen is smaller than that of air, so after the nitrogen is introduced, it will stay in the upper part of the pre-emulsifier 1, thereby compressing the air from top to bottom and discharging the air through the exhaust pipe 31, thereby conveniently discharging the air in the pre-emulsifier 1, after the air is discharged, the third electromagnetic valve 32 on the exhaust pipe 31 is closed, the corresponding third electromagnetic valve 32 of the first emulsifier adding pipe 3, the initiator adding pipe 4, the first deionized water adding pipe 5 and the mixed acrylate monomer mixed solution adding pipe 6 is opened, the heating plate 11 and the stirring device are opened to carry out pre-emulsification, thereby conveniently discharging the air and effectively improving the efficiency of pre-emulsification.

[0028] Further, since the pre-emulsified solution is introduced into the polymerization reactor from the same position, although there is a stirring device, since the volume of the polymerization reactor is large, so that the polymerization is easy to saturate near the addition position, and only a small amount of polymer is obtained far from the addition position, which affects the polymerization efficiency, the pipeline between the pre-emulsifier 1 and the polymerization reactor 2 is communicated with the horizontal pipe 33 arranged in the upper part of the polymerization reactor 2, a plurality of nozzles 34 are arranged on the lower part of the horizontal pipe 33, and the fourth electromagnetic valve 35 is arranged on the communication pipeline between the nozzle 34 and the horizontal pipe 33. By controlling the opening of the fourth electromagnetic valve 35 in turn, the pre-emulsified solution is sprayed from different nozzles 34 in turn, thereby realizing uniform addition of the pre-emulsified solution, thereby effectively improving the polymerization efficiency.

[0029] Further, the pipeline between the pre-emulsifier 1 and the polymerization reactor 2 is provided with a liquid pump 36. The liquid pump 36 can provide a high flow rate for the pre-emulsified solution, so that it is more dispersed when sprayed from the nozzle 34, thereby facilitating uniform addition of the emulsified solution.

[0030] Further, the polymeric reactor 2 top of the embodiment described is provided with a negative pressure pipe 37, the second emulsifier adding pipe 8, the second deionized water adding pipe 9, the demulsifier adding pipe 10 and the negative pressure pipe 37 are provided with a fifth electromagnetic valve 38. In the drying process, the fifth electromagnetic valve 38 on the second emulsifier adding pipe 8, the second deionized water adding pipe 9 and the demulsifier adding pipe 10 is closed, while the fifth electromagnetic valve 38 on the negative pressure pipe 37 is opened, the water vapor dried out is quickly taken away through the negative pressure to accelerate the drying efficiency, in the normal polymerization reaction, demulsification and washing operation, all the fifth electromagnetic valves 38 are closed except when the corresponding solution is added, to ensure the normal operation.

[0031] Further, the stirring device comprises a second motor 39, the second motor 39 is a corrosion-resistant sealed motor that can be used under liquid, the second motor 39 is arranged in the middle of one side of the pre-emulsifier 1 or the polymerization reactor 2, the output shaft of the second motor 39 is fixedly connected with one end of a rotating rod 40, the other end of the rotating rod 40 is rotatably connected with the middle of the other side of the pre-emulsifier 1 or the polymerization reactor 2 through a bearing 41, and a plurality of stirring blades 42 are arranged on the rotating rod 40. The rotating rod 40 and the stirring blades 42 are driven to rotate by the second motor 39, so that the stirring operation can be conveniently realized.

[0032] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A reaction device for producing acrylic polymer additives, characterized by: The invention comprises a pre-emulsifier (1) and a polymerization reactor (2), wherein the top of the pre-emulsifier (1) is connected to a first emulsifier addition pipe (3), an initiator addition pipe (4), a first deionized water addition pipe (5) and a mixed acrylic ester monomer mixture addition pipe (6), the bottom of the pre-emulsifier (1) is connected to the top of the polymerization reactor (2) through a pipeline, a first solenoid valve (7) is provided on the pipeline between the pre-emulsifier (1) and the polymerization reactor (2), the top of the polymerization reactor (2) is connected to a second emulsifier addition pipe (8), a second deionized water addition pipe (9) and a demulsifier addition pipe (10), and the pre-emulsifier (1) and the polymerization reactor (2) are connected. ) are provided with several heating plates (11) on the inner wall, a stirring device is provided in the pre-emulsifier (1) and the polymerization reactor (2), an opening (12) is provided at the lower part of the side wall of the polymerization reactor (2), a barrier net (13) is provided at one end of the opening (12) facing the polymerization reactor (2), the end of the opening (12) away from the barrier net (13) is connected to the buffer box (14), the bottom of the buffer box (14) is connected to the discharge pipe (15), a sealing device is provided in the opening (12), the bottom of the polymerization reactor (2) is connected to the discharge pipe (16), and the discharge pipe (16) is provided with a second electromagnetic valve (17) and a screw discharge conveyor (18); The sealing device includes a sealing plate (19), the sealing plate (19) can completely cover the opening (12), a placement groove (20) is provided at a position corresponding to the top of the opening (12) and the sealing plate (19), a first motor (21) is provided at the top of the placement groove (20), an output shaft of the first motor (21) is connected to one end of a screw rod (22), and the other end of the screw rod (22) is threadedly connected to a screw groove (23) provided at the top of the sealing plate (19); Grooves (24) are provided on the two side surfaces and the bottom surface of the opening (12) at positions corresponding to the sealing plate (19), and the sealing plate (19) can be plugged into and matched with the grooves (24). Sealing strips (25) are provided at positions corresponding to the sealing plate (19) and the grooves (24); A baffle (26) is provided at the communicating end between the placement groove (20) and the opening (12), a through groove (27) is provided on the baffle (26), the sealing plate (19) can pass through the through groove (27), an inverted cone-shaped rubber sleeve (28) is provided on the outer periphery of the corresponding position of the sealing plate (19) and the through groove (27), the rubber sleeve (28) can be plugged into the through groove (27), and the top length and width of the rubber sleeve (28) are both greater than the length and width of the through groove (27); The top of the pre-emulsifier (1) is connected to a nitrogen inlet pipe (29), a one-way valve (30) is provided on the nitrogen inlet pipe (29), the bottom of the pre-emulsifier (1) is connected to an exhaust pipe (31), and a third solenoid valve (32) is provided on the first emulsifier addition pipe (3), the initiator addition pipe (4), the first deionized water addition pipe (5), the mixed acrylic ester monomer mixture addition pipe (6), and the exhaust pipe (31); The pipeline between the pre-emulsifier (1) and the polymerization reactor (2) is connected to a horizontal pipe (33) provided at the upper part of the polymerization reactor (2), a plurality of nozzles (34) are provided at the lower part of the horizontal pipe (33), and a fourth solenoid valve (35) is provided on the pipeline connecting the nozzles (34) and the horizontal pipe (33); A liquid pump (36) is provided on the pipeline between the pre-emulsifier (1) and the polymerization reactor (2); The top of the polymerization reactor (2) is connected to the negative pressure pipe (37), and a fifth solenoid valve (38) is provided on the second emulsifier addition pipe (8), the second deionized water addition pipe (9), the demulsifier addition pipe (10) and the negative pressure pipe (37); The stirring device includes a second motor (39), which is arranged in the middle of one side of the pre-emulsifier (1) or the polymerization reactor (2). The output shaft of the second motor (39) is fixedly connected to one end of a rotating rod (40), and the other end of the rotating rod (40) is rotatably connected to the middle of the other side of the pre-emulsifier (1) or the polymerization reactor (2) through a bearing (41). An array of stirring blades (42) is provided on the rotating rod (40).

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