CN205731268U - Silicone acrylic emulsion polymerization reaction kettle - Google Patents

Abstract

The utility model relates to a silicon-acrylic emulsion polymerization reaction kettle, which belongs to the field of polymerization reaction devices, and comprises a kettle body, a jacket and two feed ports arranged at the upper and lower ends of the kettle body. The kettle body is provided with an agitator connected to a main shaft. There is a temperature sensor in the kettle body, a steam inlet and a steam outlet at the bottom and top of the jacket respectively, an external cooling spiral pipe is arranged in the jacket, a spoiler is arranged on the inner wall of the kettle, and a steam outlet is installed under the stirrer fixed on the kettle body. The support pipe at the bottom is equipped with a flange plate at the lower end of the feed port, the air inlet pipe passes through the flange plate and communicates with the air passage in the support pipe, and a controller is arranged on the outer wall of the kettle. The utility model adds a gas stirring device, so that the functions of fully deoxygenating, stirring, and heat dissipation are achieved, and the stirring resistance is reduced, so that the reaction is uniform and stable, and the temperature is also well controlled, so that the explosion phenomenon is eliminated, and the safety hazard is eliminated. The spoiler increases the dispersibility of the material, improves the yield of the material, and improves the quality of the product.

Description

Silicone acrylic emulsion polymerization reactor

technical field

The utility model belongs to the field of polymerization reaction devices, in particular to a silicon-acrylic emulsion polymerization reaction kettle.

Background technique

Silicone-acrylic emulsion is an emulsion that is polymerized by adding unsaturated bond-containing organosilicon monomers and acrylic monomers with suitable additives through a core-shell coating polymerization process. It combines the high temperature resistance, weather resistance, chemical resistance, hydrophobicity, low surface energy and non-pollution of silicone with the high color retention, flexibility and adhesion of acrylic resin. It is an environment-friendly architectural emulsion and coating with high weather resistance, high water resistance and anti-pollution. During the use of the traditional silicon-acrylic emulsion polymerization kettle, the viscosity of the system increases rapidly with the progress of the reaction, which is not conducive to the dispersion of the initiator; the viscosity of the system increases rapidly, and the heat released by the polymerization reaction is not easy to diffuse and exchange, resulting in the temperature of the material system It is difficult to control, leading to the breakage and decomposition of molecular chains, affecting the size of molecular weight, thereby affecting the output of products, and even triggering explosion polymerization to bring hidden dangers to production safety; and there is uneven stirring, due to uneven stirring, heat dissipation is not easy, resulting in reaction Inhomogeneity, wide distribution of molecular weight, large difference in yield and quality.

Utility model content

The purpose of this utility model is to provide a silicon-acrylic emulsion polymerization reactor to solve the above problems.

The utility model silicon-acrylic emulsion polymerization reaction kettle comprises a kettle body, a jacket and two feeding ports arranged at the upper and lower ends of the kettle body. The kettle body is provided with an agitator, the agitator is connected to a main shaft, and the upper end of the main shaft is connected and fixed on the top of the kettle body. Motor, temperature sensor in the kettle body, steam inlet and steam outlet on the bottom and top of the jacket respectively, external cooling spiral tube in the jacket, spoiler on the inner wall of the kettle, and fixed on the bottom of the agitator The support pipe at the bottom of the kettle body, the top of the support pipe is connected to the gas stirring device through bearings, the lower end of the material port is equipped with a flange, and an air inlet pipe passes through the flange to communicate with the air passage in the support pipe, and the air passage is connected to the inside of the gas stirring device. A controller is arranged on the outer wall of the kettle, and the controller is connected with the speed regulating motor, the temperature sensor, the control valve on the steam inlet and the external cooling spiral pipe.

The gas stirring device includes a hollow disk, the inside of the hollow disk communicates with the air passage, the outside of the hollow disk is connected with an air guide tube, the air guide tube is designed as an arc, the outside of the air guide tube is connected with a flow limiting tube, and the flow limiting The tube is designed in the shape of a funnel. While increasing the stirring, the inert gas is introduced, so that the functions of fully deoxygenating, stirring, and heat dissipation can be achieved, and the stirring resistance is reduced, which is easy to stir and disperse the initiator, plus the function of the stirrer , so that the reaction is uniform and stable, and the temperature is well controlled, so that the phenomenon of implosion can be eliminated, the product quality can be improved, and the hidden danger of safety can be eliminated.

The reactor is also provided with a bubble suppressor to reduce the generation of bubbles in the upper part.

The air bubble suppressor includes an evacuator, a suction pipe, a return pipe and a filter; one end of the suction pipe communicates with the interior of the still body, the other end of the suction pipe is installed at the input end of the evacuator, and one end of the return pipe It is connected to the evacuator through a filter, and the other end of the return pipe communicates with the interior of the kettle body.

Compared with the prior art, the utility model has the advantages of:

Adding a gas stirring device, in the case of feeding inert gas, not only achieves the functions of fully deoxygenating, stirring, and heat dissipation, but also reduces the stirring resistance, which is easy to stir and disperse the initiator, and the function of the stirrer makes the reaction uniform It is stable and the temperature is well controlled, which prevents the explosion phenomenon, improves the product quality, and eliminates potential safety hazards. A spoiler is set to make the material contact with the spoiler, increasing the probability of collision, thereby increasing the material The chance of intermolecular collision increases the dispersibility of the material, so that the material reacts fully, improves the yield of the material, and improves the quality of the product.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of gas stirring device;

In the figure: 1. Motor, 2. Main shaft, 3. Agitator, 4. Suction pipe, 5. Evacuator, 6. Filter, 7. Return pipe, 8. Jacket, 9. Round hole, 10. Outer Cold spiral pipe, 11, spoiler, 12, steam inlet, 13, gas stirring device, 13.1, hollow disk, 13.2, air guide pipe, 13.3, restrictor pipe, 14, bearing, 15, intake pipe, 16, flange , 17, lower feed port, 18, support pipe, 19, air passage, 20, controller, 21, temperature sensor, 22, steam outlet, 23, upper feed port.

detailed description

The specific embodiment of the utility model will be described in further detail below with reference to the accompanying drawings.

The silicon-acrylic emulsion polymerization reaction kettle shown in Figures 1 and 2 includes a kettle body, a jacket 8 and two feed ports located at the upper and lower ends of the kettle body. The kettle body is provided with an agitator 3, and the agitator 3 is connected to the main shaft 2. The upper end of the main shaft 2 is connected to the motor 1 fixed on the top of the kettle body. The temperature sensor 21 is installed in the kettle body. The bottom and top of the jacket 8 are respectively provided with a steam inlet 12 and a steam outlet 22. The jacket 8 is provided with an external cooling spiral pipe 10. A spoiler 11 is arranged on the inner wall of the kettle, and a support pipe 18 fixed on the bottom of the kettle body is arranged under the agitator 3. The top of the support pipe 18 is connected to the gas stirring device 13 through a bearing 14, and the lower end material port 17 is equipped with a flange 16. , an air inlet pipe 15 communicates with the air passage 19 in the support pipe 18 through the flange 16, the air passage 19 communicates with the inside of the gas stirring device 13, and a controller 20 is arranged on the outer wall of the kettle, and the controller 20 is connected with the speed regulating motor 1 , the temperature sensor, the control valve on the steam inlet 12 and the external cooling spiral pipe 10 are connected, the material enters the reactor from the upper feed port 23, and steam is introduced into the jacket 8 and the temperature in the reactor is controlled by the controller 20. The temperature is better stirred by the stirrer 3 and the gas stirring device 13.

The gas stirring device 13 includes a hollow disk 13.1, which communicates with an air passage 19 inside, and the outside of the hollow disk 13.1 is connected with an air guide tube 13.2, and the air guide tube 13.2 is designed as a circular arc, and the outside of the air guide tube 13.2 is connected with a flow-limiting Tube 13.3, said restrictor tube 13.3 is designed as a funnel. While increasing the stirring, the inert gas is introduced to achieve the functions of fully deoxygenating, stirring, and heat dissipation, and the stirring resistance is reduced, which is easy to stir and disperse the initiator. With the function of the stirrer 3, the reaction is even and stable. , The temperature is also well controlled to prevent the phenomenon of explosion, improve product quality, and eliminate potential safety hazards.

The reactor is also equipped with a bubble suppressor to reduce the generation of bubbles in the upper part.

The bubble suppressor comprises an evacuator 5, a suction pipe 4, a return pipe 7 and a filter 6; one end of the suction pipe 4 communicates with the interior of the still body, and the other end of the suction pipe 4 is installed at the input end of the evacuator 5, One end of the return pipe 7 is connected to the evacuator 5 through the filter 6, and the other end of the return pipe 7 communicates with the interior of the kettle body.

The spoiler 11 is provided with a circular hole 9 .

In summary, the utility model adds a gas stirring device, which can achieve the functions of fully deoxygenating, stirring, and heat dissipation when the inert gas is introduced, and reduces the stirring resistance, making it easy to stir and disperse the initiator. The function of the stirrer makes the reaction even and stable, and the temperature is also well controlled, which prevents the phenomenon of explosion, improves the product quality, eliminates the safety hazard, and sets the spoiler to make the material pass through the contact with the spoiler, increasing the collision. Probability, thereby increasing the collision chance between material molecules, increasing the dispersion of materials, so that the materials can fully react, improve the yield of materials, and improve the quality of products.

Claims (5)

1. A silicon-acrylic emulsion polymerization reaction kettle, comprising a kettle body, a jacket (8) and two feed ports located at the upper and lower ends of the kettle body, the kettle body is provided with an agitator (3), and the agitator (3) is connected to the main shaft (2), the upper end of the main shaft (2) is connected to the motor (1) fixed on the top of the kettle body, and the kettle body is provided with a temperature sensor (21), which is characterized in that the bottom and top of the jacket (8) are respectively provided with steam inlets (12) and the steam outlet (22), the outer cooling spiral pipe (10) is arranged in the jacket (8), the spoiler (11) is arranged on the inner wall of the kettle body, and the bottom of the kettle body is fixed under the agitator (3). The support pipe (18), the top of the support pipe (18) is connected to the gas stirring device (13) through the bearing (14), the lower end material port (17) is equipped with a flange (16) plate, and an air inlet pipe (15) passes through the flange (16) The disc communicates with the air passage (19) in the support pipe (18), and the air passage (19) communicates with the inside of the gas stirring device (13). It is connected with the speed regulating motor (1), the temperature sensor, the control valve on the steam inlet (12) and the external cooling spiral pipe (10). 2. The silicon-acrylic emulsion polymerization reactor according to claim 1, characterized in that the gas agitation device (13) comprises a hollow disk (13.1), and the hollow disk (13.1) communicates with an air passage (19) inside, and the hollow disk (13.1) An air guide tube (13.2) is connected to the outer side of the disc (13.1), and the air guide tube (13.2) is designed as a circular arc. Designed in a funnel shape. 3. The silicone-acrylic emulsion polymerization reactor according to claim 1, characterized in that the reactor is also provided with a bubble suppressor. 4. silicon-acrylic emulsion polymerization reactor according to claim 3, is characterized in that said bubble suppressor comprises evacuator (5), suction pipe (4), return pipe (7) and filter (6); One end of the suction pipe (4) communicates with the interior of the kettle body, the other end of the suction pipe (4) is installed on the input end of the evacuator (5), and one end of the return pipe (7) passes through the filter (6) and The evacuator (5) is connected, and the other end of the return pipe (7) communicates with the interior of the kettle body. 5. The silicone-acrylic emulsion polymerization reactor according to claim 1, characterized in that a circular hole (9) is provided on the spoiler (11).