Combined emulsified epoxy resin preparation device

Abstract

The utility model relates to a combined emulsified epoxy resin preparation device which comprises a reaction kettle, a first stirring shaft, a second stirring shaft and a third stirring shaft are rotatably mounted in the reaction kettle, the first stirring shaft is positioned in the center of the reaction kettle, and the second stirring shaft and the third stirring shaft are respectively arranged on two sides of the first stirring shaft. Anchor type stirring blades are installed at the bottom of the first stirring shaft, a dispersing disc is fixedly connected to the bottom of the second stirring shaft, a stator outer sleeve is arranged at the bottom of the third stirring shaft, an emulsifying rotor located in an inner cavity of the stator outer sleeve is fixed to the bottom of the third stirring shaft, and rectangular windows are evenly distributed in the circumferential wall of the inner cavity of the stator outer sleeve in the circumferential direction. A feeding pipe is arranged on the upper end surface of the kettle body of the reaction kettle; a discharging pipe is mounted in the center of the bottom of the kettle body of the reaction kettle. According to the utility model, the stirring, dispersing and emulsifying processes of materials are integrated, and compared with the conventional single emulsifying and dispersing production process, the preparation time of the epoxy emulsion is greatly shortened, and the emulsifying efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the preparation technical field of high molecule emulsion, especially a combined high -efficient emulsification epoxy resin preparation device. BACKGROUND

[0002] Epoxy resin is one of the most widely used resin varieties in the anticorrosive coating and adhesive industry, but its solid resin needs to add a large amount of solvent to reduce the viscosity when used in the coating industry, causing the emission of volatile organic compounds (VOC). Using epoxy emulsion to replace part of the oily epoxy resin is an important direction for the development of the epoxy resin industry.

[0003] Currently, the method for emulsifying solid epoxy resin is to melt and uniformly blend the non-ionic emulsifier containing long hydrophilic chain segments and epoxy groups with the epoxy resin, then slowly add water, and under the action of water-soluble non-ionic emulsifier and strong shear force, disperse the solid epoxy and cosolvent into small droplets, adsorb the emulsifier on the surface, realize the inversion from "water-in-oil" to "oil-in-water", and obtain the epoxy emulsion. The formation process of the epoxy emulsion includes melting, dissolving, dispersing, phase inversion, and particle size refinement of the solid epoxy. Only when the emulsion particle size is appropriate and uniform, can the stability of the emulsion be ensured, the permeability in the substrate, the mixing uniformity of the subsequently added filler, the continuity and density of the film formation, and the gloss and mechanical properties of the film formation be ensured.

[0004] To achieve the above requirements, the structure of the emulsifier and the preparation formula of the emulsion, and the stirring and dispersion form are very important. Currently, there are three typical stirring and dispersion forms suitable for the emulsification of solid epoxy resin to prepare epoxy emulsion: 1. anchor stirrer, 2. high-speed disperser, and 3. high-shear emulsifier. Among them, the anchor stirrer belongs to low-shear high-torque stirring, which is suitable for dispersing the particles of solid epoxy or the large aggregates of small particle solid epoxy resin caused by high temperature in summer, and gradually melting and dissolving in the cosolvent and mixing uniformly under the action of temperature together with the emulsifier; the high-speed disperser is suitable for shearing the epoxy resin oil phase into small droplets with small particle size under the condition of adding water, and gradually completing the phase inversion from "water-in-oil" to "oil-in-water". The high-shear emulsifier is suitable for further shearing, refining, and homogenizing the emulsion that has been phase-inverted, to obtain an emulsion with smaller particle size and more uniform distribution.

[0005] Currently, the main way to prepare epoxy emulsion is to use anchor stirrer and high-speed disperser, and the use of high shear emulsifier is less, or the formed emulsion needs to be transferred to the second reactor, which is low in efficiency. The feeding of high shear emulsifier has certain requirements on the particle size and viscosity of the emulsion. Large particle aggregates and materials with excessive viscosity in the emulsion may damage the emulsifier. The viscosity of the epoxy emulsion obtained by external emulsification is greatly affected by the dispersion state of the epoxy phase, and the viscosity control of the epoxy emulsion is also an important part of obtaining high-quality epoxy emulsion. Practical new type content

[0006] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, the utility model provides a combined emulsified epoxy resin preparation device integrating stirring, dispersion and shearing.

[0007] The utility model adopts the technical scheme that a combined emulsified epoxy resin preparation device comprises a reaction kettle, a first stirring shaft, a second stirring shaft and a third stirring shaft are rotatably installed in the reaction kettle, the first stirring shaft is located at the center of the reaction kettle, the second stirring shaft and the third stirring shaft are respectively arranged on the two sides of the first stirring shaft, anchor stirring blades are installed at the bottom of the first stirring shaft, a dispersion disc is fixedly connected to the bottom of the second stirring shaft, a stator sleeve is arranged at the bottom of the third stirring shaft, an emulsifying rotor is fixedly arranged in the inner cavity of the stator sleeve, rectangular windows are uniformly distributed on the circumferential wall of the inner cavity of the stator sleeve, a feeding pipe is arranged on the upper end face of the kettle body of the reaction kettle, and a discharging pipe is arranged at the bottom center of the kettle body of the reaction kettle.

[0008] Specifically, the upper end face of the kettle body of the reaction kettle is respectively provided with a first machine base, a second machine base and a third machine base, a first motor is arranged on the first machine base and connected with the first stirring shaft in a transmission mode, a second motor is arranged on the second machine base and connected with the second stirring shaft in a transmission mode, and a third motor is arranged on the third machine base and connected with the third stirring shaft in a transmission mode.

[0009] Further, in order to monitor the viscosity of the material in the reaction kettle in real time, an on-line viscometer is arranged on the lower side wall of the reaction kettle, the on-line viscometer is connected with a DCS controller through a viscosity transmitter line, and the DCS controller controls the start-stop and rotating speed of the first motor, the second motor and the third motor.

[0010] Further, the stator sleeve is fixed with the bottom flange of the third machine base through the circumferentially distributed supporting rods.

[0011] Three sector blades are circumferentially and uniformly distributed in the middle of the third stirring shaft, and the sector blades can exchange the flow of the emulsified epoxy emulsion and the epoxy emulsion not emulsified around, so that the emulsification effect is further improved.

[0012] For the convenience of controlling the discharging speed, the discharging pipe is connected with the bottom of the reaction kettle through a flange, and a discharging valve for controlling the discharging is installed on the discharging pipe of the bottom of the reaction kettle.

[0013] Further, a jacket is installed on the outer wall of the kettle body of the reaction kettle, and an inspection hole is arranged on the upper end surface of the kettle body of the reaction kettle.

[0014] The beneficial effects of the present application are: the anchor stirring blade, the dispersion disc, the stator sleeve and the emulsifying rotor are arranged in the reaction kettle, so that the stirring, dispersion and emulsification process of the material for preparing the epoxy emulsion are integrated, compared with the conventional single emulsification dispersion production process, the preparation time of the epoxy emulsion is greatly shortened, and the emulsification efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be further described below in combination with the drawings and embodiments.

[0016] Figure 1 is a structural schematic view of the present application.

[0017] Figure 2 is a structural schematic view of the high-shear emulsification assembly.

[0018] In the figure: 1. reaction kettle, 2. first stirring shaft, 3. second stirring shaft, 4. third stirring shaft, 5. anchor stirring blade, 6. dispersion disc, 7. stator sleeve, 7-1. rectangular window, 8. emulsifying rotor, 9. feeding pipe, 10. discharging pipe, 11. first machine base, 12. second machine base, 13. third machine base, 14. first motor, 15. second motor, 16. third motor, 17. online viscometer, 18. viscosity transmitter, 19. DCS controller, 20. support rod, 21. fan-shaped blade, 22. flange, 23. discharging valve, 24. jacket, 25. inspection hole. DETAILED DESCRIPTION

[0019] The present application will be further described below in combination with the drawings and embodiments.

[0020] As Figure 1The illustrated combined emulsified epoxy resin preparation device comprises a reaction kettle 1, a jacket 24 is installed on the outer wall of the kettle body of the reaction kettle 1, an inspection hole 25 is arranged on the upper end face of the kettle body of the reaction kettle 1 on the left side, a feeding pipe 9 is arranged on the upper end face of the kettle body of the reaction kettle 1 on the right side, and a discharging pipe 10 is installed on the bottom center of the kettle body of the reaction kettle 1, wherein the discharging pipe 10 is connected with the discharging pipe of the bottom of the reaction kettle 1 through a flange plate 22, and a discharging valve 23 for controlling the discharging speed is installed on the discharging pipe of the reaction kettle 1.

[0021] The reaction kettle is provided with an anchor stirring assembly, a high-speed dispersion assembly and a high-shear emulsification assembly, the anchor stirring assembly comprises a first stirring shaft 2 rotatably installed in the reaction kettle 1, the axis of the first stirring shaft 2 is coaxial with the axis of the reaction kettle 1, and an anchor stirring blade 5 is installed at the bottom of the first stirring shaft 2, the anchor stirring assembly can provide stirring capacity for high viscosity and can provide liquid tumbling capacity for low viscosity;

[0022] The high-speed dispersion assembly comprises a second stirring shaft 3 rotatably installed in the reaction kettle 1, the second stirring shaft 3 is located on the left side of the first stirring shaft 2 and is parallel to the first stirring shaft 2, a dispersion disc 6 is fixedly connected to the bottom of the second stirring shaft 3, and the position of the dispersion disc 6 is slightly lower than the upper edge of the anchor stirring blade 5, the high-speed dispersion assembly can provide high-speed dispersion and emulsification capacity for medium and low viscosity;

[0023] Referring to Figure 2 The high-shear emulsification assembly comprises a third stirring shaft 4 rotatably installed in the reaction kettle 1, the third stirring shaft 4 is located on the right side of the first stirring shaft 2 and is parallel to the first stirring shaft 2, a stator sleeve 7 is arranged at the bottom of the third stirring shaft 4, the position of the stator sleeve 7 is slightly lower than the upper edge of the anchor stirring blade 5, an emulsification rotor 8 is fixedly connected to the inner cavity of the stator sleeve 7, rectangular windows 7-1 are uniformly distributed on the circumferential wall of the inner cavity of the stator sleeve 7, and the high-shear emulsification assembly can provide high-shear emulsification capacity for low viscosity.

[0024] The upper end face of the kettle body of the reaction kettle 1 is respectively provided with a first machine base 11, a second machine base 12 and a third machine base 13, the first machine base 11 is provided with a first motor 14 in transmission connection with the first stirring shaft 2, the second machine base 12 is provided with a second motor 15 in transmission connection with the second stirring shaft 3, and the third machine base 13 is provided with a third motor 16 in transmission connection with the third stirring shaft 4.

[0025] The stator jacket is composed of a disc at the upper end and a cylinder at the lower end, the disc is fixed with the flange at the bottom of the third base 13 through four support rods 20 distributed in the circumference, a through hole matched with the third stirring shaft 4 in clearance is formed in the center of the disc, the rectangular windows 7-1 are distributed in the circumference of the wall of the cylinder, and the emulsification rotor 8 is located in the cylinder, so that when the high-shear emulsification assembly works, the emulsification rotor 8 sucks the low-viscosity emulsified materials from the bottom of the cylinder, and then diffuses and discharges from the rectangular windows 7-1 around the cylinder.

[0026] Further, three fan-shaped blades 21 are distributed in the circumference of the middle part of the third stirring shaft 4, the high-speed emulsification rotor 8 is exchanged with the peripheral emulsification rotor 8 through the synchronous rotation of the third stirring shaft 4 through the three fan-shaped blades 21.

[0027] The on-line viscometer 17 is installed below the outer wall of the reaction kettle 1, the on-line viscometer 17 is connected with the DCS controller 19 through the viscosity transmitter 18, the viscosity of the materials in the reaction kettle 1 can be monitored in real time during preparation, and the viscosity data can be transmitted to the DCS controller 19 through the viscosity transmitter 18, and the DCS controller 19 controls the start-stop and rotating speed of the first motor 14, the second motor 15 and the third motor 16 through the viscosity range.

[0028] The above-mentioned viscosity range has three gradients, the first viscosity gradient is that the solid epoxy is melted, the viscosity range is 1000-3000 mPas / 80 DEG C, at this time, the first motor 14 is mainly started; the second viscosity gradient is that the emulsified water is slowly added, the viscosity range is 800-3000 mPas / 70-80 DEG C, at this time, the first motor 14 and the second motor 15 are mainly started; the third viscosity gradient is ≤800 mPas / 70-80 DEG C, at this time, the first motor 14, the second motor 15 and the third motor 16 are all started.

[0029] The DCS controller 19 can accurately obtain the emulsification viscosity peak in the reaction kettle 1 through the on-line viscometer 17, and start the high-shear emulsification assembly in time according to the viscosity, so that the epoxy emulsion with fine particle size can be more efficiently obtained.

[0030] The utility model discloses a set material's stirring, dispersion and emulsification in one, compared with single emulsification dispersion production process in the prior art, can greatly shorten emulsification time, promote emulsification efficiency.

[0031] With the above ideal embodiment of the present application as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A combined emulsified epoxy resin preparation device comprising a reaction kettle (1), characterized in that: The first stirring shaft (2), the second stirring shaft (3) and the third stirring shaft (4) are rotatably arranged in the reaction kettle (1), the first stirring shaft (2) is located at the center of the reaction kettle (1), the second stirring shaft (3) and the third stirring shaft (4) are respectively arranged on the two sides of the first stirring shaft (2), the bottom of the first stirring shaft (2) is provided with an anchor stirring blade (5), the bottom of the second stirring shaft (3) is fixedly connected with a dispersion disc (6), a stator sleeve (7) is arranged at the bottom of the third stirring shaft (4), an emulsifying rotor (8) is fixedly arranged in the inner cavity of the stator sleeve (7), a plurality of rectangular windows (7-1) are uniformly distributed on the circumferential wall of the inner cavity of the stator sleeve (7), a feeding pipe (9) is arranged on the upper end surface of the kettle body of the reaction kettle (1), and a discharging pipe (10) is arranged at the bottom center of the kettle body of the reaction kettle (1).

2. The combined emulsified epoxy resin preparation device according to claim 1, characterized by: The first motor (14) is arranged on the first motor (14) and is in driving connection with the first stirring shaft (2), the second motor (15) is arranged on the second motor (15) and is in driving connection with the second stirring shaft (3), and the third motor (16) is arranged on the third motor (16) and is in driving connection with the third stirring shaft (4).

3. The combined emulsified epoxy resin preparation device according to claim 2, characterized by: The on-line viscometer (17) is arranged below the outer wall of the reaction kettle (1), the DCS controller (19) is connected with the on-line viscometer (17) through the viscosity transmitter (18) line, and the DCS controller (19) controls the start-stop and rotating speed of the first motor (14), the second motor (15) and the third motor (16).

4. The combined emulsified epoxy resin preparation device according to claim 2, characterized by: The stator sleeve (7) is fixedly connected with the bottom flange of the third motor (13) through the circumferentially distributed supporting rods (20).

5. The combined emulsified epoxy resin preparation device according to claim 1, characterized by: The third stirring shaft (4) is provided with three fan-shaped blades (21) which exchange the flow of the emulsified epoxy emulsion and the peripheral unemulsified epoxy emulsion.

6. The combined emulsified epoxy resin preparation device according to claim 1, characterized by: The discharging pipe (10) is connected with the bottom of the reaction kettle (1) through the flange (22), and the discharging valve (23) for controlling the discharging is arranged on the discharging pipe of the bottom of the reaction kettle (1).

7. The combined emulsified epoxy resin preparation device according to claim 1, characterized by: The jacket (24) is arranged on the outer wall of the kettle body of the reaction kettle (1), and the access hole (25) is arranged on the upper end surface of the kettle body of the reaction kettle (1).

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