Dispersing and emulsifying device for acrylic polymer

Abstract

The utility model relates to the technical field of emulsification, in particular to an acrylic polymer dispersing and emulsifying device which comprises a wall body and a dispersing structure, the dispersing structure is axially and rotatably mounted in the wall body and comprises a first upper dispersion body and a first lower dispersion body, the first upper dispersion body is rotatably mounted in the center of the wall body, and the first lower dispersion body is rotatably mounted in the center of the wall body. A first lower dispersion body is coaxially and rotationally mounted on the radial outer side of the first upper dispersion body, speed reducer assemblies are fixedly connected to the lower portions of the first upper dispersion body and the first lower dispersion body, and the first upper dispersion body and the first lower dispersion body coaxially and differentially rotate in the radial direction; the problem that the dispersion and emulsification effect is affected by layering and dead angles easily caused by insufficient mixing and shearing force of the dispersion and emulsification device is solved.

Description

Technical Field

[0001] This utility model relates to the field of emulsification technology, specifically to a dispersion and emulsification device for acrylic polymers. Background Technology

[0002] Existing dispersion and emulsification devices for acrylic polymers typically disperse monomers into tiny liquids using stirred or shear-type dispersion equipment, ensuring uniform contact and adsorption with the emulsifier before heating and polymerization. However, these devices are prone to stratification and sedimentation during monomer dispersion due to insufficient mixing and shear force, resulting in concentration differences and mixing dead zones, which negatively impacts the dispersion and emulsification effect.

[0003] Therefore, this invention provides a dispersion and emulsification device for acrylic polymers to solve the above-mentioned problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to solve the problem that the dispersion and emulsification device is prone to stratification and dead zones due to insufficient mixing and shearing force, which affects the dispersion and emulsification effect.

[0005] This utility model provides the following technical solution: a dispersion and emulsification device for acrylic polymer, comprising a wall and a dispersion structure, wherein the dispersion structure is axially rotatably installed in the wall, the dispersion structure comprising a first upper dispersion body and a first lower dispersion body, the first upper dispersion body is rotatably installed at the center of the wall, and the first lower dispersion body is rotatably installed radially outward and coaxially, and a speed reducer assembly is fixedly connected below both the first upper dispersion body and the first lower dispersion body, and the first upper dispersion body and the first lower dispersion body rotate radially coaxially and differentially.

[0006] The first upper dispersion body includes a driving body, an inner rotating shaft, and a first upper shear body. The driving body is fixedly installed on the top of the wall, and the inner rotating shaft driven by the driving body is installed on the inner rotating shaft of the wall. The first upper shear body is fixedly installed on the surface of the inner rotating shaft.

[0007] The first upper dispersion body further includes an upper fixed shaft and an upper fixed body. At least two upper fixed shafts are fixedly arranged in a ring along the inner rotation axis on the wall surface. An upper fixed body is fixedly installed at the end of the upper fixed shaft. The first upper shear body is located inside the upper fixed body.

[0008] The first lower dispersion body includes an outer rotating shaft and a first lower shear body. The outer rotating shaft is rotatably installed on the inner wall of the bottom of the wall body, which is coaxial with the inner rotating shaft. The first lower shear body is fixedly installed on the surface of the outer rotating shaft below the first upper shear body.

[0009] The first lower dispersion body also includes a lower fixed shaft and a lower fixed body. At least two lower fixed shafts are fixedly arranged in a ring along the outer rotation axis on the surface of the wall. A lower fixed body is fixedly installed at the end of the lower fixed shaft.

[0010] Both the upper and lower fixing bodies are cylindrical structures, and through grooves are formed on the surfaces of both the upper and lower fixing bodies.

[0011] Both the first upper shear body and the first lower shear body are propulsion impellers with shearing teeth fixed on their edges.

[0012] The reducer assembly includes a first gear, a second gear, and a third gear. The first gear, which is fixedly connected to the end of the inner rotating shaft, is rotatably mounted on the bottom of the wall. The second gear, which meshes with the first gear, is rotatably mounted on the bottom of the wall. The third gear is coaxially fixedly mounted on the third gear. The fourth gear, which meshes with the third gear, is fixedly mounted on the surface of the outer rotating shaft.

[0013] A second upper dispersion and a second lower dispersion are rotatably mounted on both sides of the first upper dispersion and the first lower dispersion, respectively.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This utility model utilizes the combination of a dispersion structure and a reducer structure to achieve differential shearing between the first upper shear body and the first lower shear body. This causes monomer droplets or polymer particles to be repeatedly torn and broken in a three-dimensional flow field, which helps to ensure comprehensive shearing of the material and thus improves the shearing effect, ensuring the dispersion and emulsification effect. At the same time, the fixed body and the lower fixed body constrain the flow field, allowing the acrylic polymer to be repeatedly guided through the lower fixed body and repeatedly sheared by the first lower shear body, thereby further improving the uniformity of dispersion and the dispersion and emulsification effect. Furthermore, the edge teeth of the through-groove generate shearing and tearing action on the raw material, and in conjunction with the first upper or first lower dispersion body, multi-stage shearing is achieved, thereby improving the dispersion and emulsification effect.

[0016] 2. In this invention, during the differential rotation and convection shearing process of the first upper shear body and the first lower shear body, it can also cooperate with the second upper shear body and the second lower shear body to form an upward and downward flow on both sides and a counterflow in the middle. This allows the raw material to circulate as a whole, forming a complex three-dimensional flow field and convective shearing impact at the axis, thereby ensuring the comprehensiveness of material shearing and improving the material shearing effect, thus ensuring the dispersion and emulsification effect. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall front cross-sectional structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of the speed reducer assembly of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the first upper shear body or the first lower shear body of this utility model;

[0021] Figure 4 This is a schematic diagram of the through groove and edge teeth of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the first upper dispersion or the first lower dispersion of this utility model.

[0023] In the diagram: 1. Wall; 2. First upper dispersion body; 21. Drive body; 22. Inner rotating shaft; 23. First upper shear body; 24. Upper fixed shaft; 25. Upper fixed body; 3. First lower dispersion body; 31. Outer rotating shaft; 32. First lower shear body; 33. Lower fixed shaft; 34. Lower fixed body; 4. Reducer assembly; 41. First gear; 42. Second gear; 43. Third gear; 44. Fourth gear; 5. Through groove; 51. Edge tooth; 6. Shearing tooth; 7. Second upper shear body; 8. Second lower shear body; 9. Connecting piece. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely represents some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and "back side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this utility model is conventionally placed during use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0027] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Addressing the problem that existing dispersion and emulsification devices are prone to stratification and dead zones due to insufficient mixing and shear force, thus affecting the dispersion and emulsification effect, this disclosure provides a dispersion and emulsification device for acrylic polymers, such as... Figures 1 to 5 As shown, the structure includes a wall 1 and a dispersion structure. The dispersion structure is axially rotatably installed inside the wall 1. The dispersion structure includes a first upper dispersion body 2 and a first lower dispersion body 3. The first upper dispersion body 2 is rotatably installed at the center of the wall 1. The first lower dispersion body 3 is rotatably installed longitudinally and coaxially outside the first upper dispersion body 2. A speed reducer assembly 4 is fixedly connected below both the first upper dispersion body 2 and the first lower dispersion body 3. The first upper dispersion body 2 and the first lower dispersion body 3 rotate radially coaxially and differentially.

[0029] It should be noted that the upper two sides of the wall 1 are symmetrically equipped with inlets, and the lower side of the wall 1 is fixedly equipped with an outlet.

[0030] like Figure 1 , Figures 3 to 5 As shown, the first upper dispersion body 2 includes a driving body 21, an inner rotating shaft 22 and a first upper shearing body 23. The driving body 21 is fixedly installed on the top of the wall 1, and the inner rotating shaft 22 driven by the driving body 21 is rotatably installed inside the wall 1. The first upper shearing body 23 is fixedly installed on the surface of the inner rotating shaft 22.

[0031] During the dispersion and emulsification of the acrylic polymer, the drive unit 21 drives the inner rotating shaft 22 to rotate. During the rotation of the inner rotating shaft 22, the first upper shear body 23 rotates and generates radial shear force on the acrylic polymer, aqueous phase, and emulsifier, thereby dispersing the acrylic polymer in the water. The acrylic polymer, emulsifier, and water are mixed and stirred at high speed to form a pre-emulsion, which is then heated and subjected to free radical polymerization to form uniform polymer latex particles. Simultaneously with the rotation and shearing of the first upper dispersion body 2, a first lower dispersion body 3 is installed coaxially and longitudinally mirror-rotating, capable of relative rotation and shearing. This allows for convective shearing at different locations, optimizing the flow field and ensuring thorough mixing and dispersion throughout the region, preventing material aggregation or sedimentation. This further breaks down and refines droplets or particles, improving the uniformity and stability of the dispersion and emulsification.

[0032] like Figure 1 , Figures 3 to 5 As shown, the first upper dispersion body 2 also includes an upper fixed shaft 24 and an upper fixed body 25. At least two upper fixed shafts 24 are fixedly arranged in an annular array along the inner rotation shaft 22 on the surface of the wall body 1. An upper fixed body 25 is fixedly installed at the end of the upper fixed shaft 24. The first upper shear body 23 is located inside the upper fixed body 25.

[0033] While the first upper dispersion 2 is rotating and shearing, a fixed upper fixing body 25 is installed around the first upper shearing body 23. This allows the flow field to be constrained by the upper fixing body 25 during the rotation of the first upper dispersion 2, so that the acrylic polymer can be repeatedly guided through the upper fixing body 25 and repeatedly subjected to shearing by the first upper shearing body 23, thereby improving the uniformity of dispersion and improving the dispersion and emulsification effect.

[0034] like Figure 1 , Figures 3 to 5 As shown, the first lower dispersion body 3 includes an outer rotating shaft 31 and a first lower shear body 32. The outer rotating shaft 31 is rotatably installed on the inner wall of the bottom of the wall body 1, which is located on the radially outer side of the inner rotating shaft 22. The first lower shear body 32 is fixedly installed on the surface of the outer rotating shaft 31 below the first upper shear body 23.

[0035] like Figure 1 As shown, the first lower dispersion 3 faces upward, and the first upper dispersion 2 faces downward, with opposite orientations.

[0036] During the rotational shearing process of the first upper dispersion 2, the first upper dispersion 2 can drive the first lower dispersion 3 to rotate synchronously through the reducer assembly 4. This allows the first lower dispersion 3 to perform radial shearing while simultaneously engaging in convective shearing with the first upper dispersion 2 during rotation, ensuring thorough mixing and dispersion throughout the entire area to prevent material aggregation or sedimentation. Consequently, droplets or particles are more fully broken down and refined, thereby improving the uniformity and stability of dispersion and emulsification.

[0037] like Figure 1 , Figures 3 to 5 As shown, the first lower dispersion body 3 further includes a lower fixed shaft 33 and a lower fixed body 34. At least two lower fixed shafts 33 are arranged in a ring along the outer rotation axis 31 on the surface of the wall 1, and a lower fixed body 34 is fixedly installed at the end of each lower fixed shaft 33. This allows the flow field to be constrained by the lower fixed body 34 during the rotation of the first lower dispersion body 3, enabling the acrylic polymer to be repeatedly guided through the lower fixed body 34 and repeatedly subjected to shearing by the first lower shear body 32, thereby improving the uniformity of dispersion and enhancing the dispersion and emulsification effect.

[0038] like Figures 3 to 5 As shown, both the upper fixed body 25 and the lower fixed body 34 are cylindrical structures. Both the upper fixed body 25 and the lower fixed body 34 have through grooves 5 on their surfaces, and edge teeth 51 are fixedly installed on the surface of the through grooves 5. This allows the first upper dispersion body 2 and the first lower dispersion body 3 to undergo radial shearing during rotation, while simultaneously experiencing mutual convective shearing through the guided and constrained flow fields of the upper fixed body 25 and the lower fixed body 34. This ensures thorough mixing and dispersion throughout the region, preventing material aggregation or sedimentation, and further breaks down and refines droplets or particles, thereby improving the uniformity and stability of dispersion and emulsification. Simultaneously, the through grooves 5 on the surfaces of both the upper fixed body 25 and the lower fixed body 34 allow material to pass through this narrow channel during the rotational shearing process of the first upper dispersion body 2 and the first lower dispersion body 3. This generates a very high velocity gradient during passage, which, through the edge teeth 51, shears and tears the raw material. This, combined with the first upper dispersion body 2 or the first lower dispersion body 3, achieves multi-stage shearing, thereby improving the dispersion and emulsification effect.

[0039] like Figures 3 to 5 As shown, both the first upper shear body 23 and the first lower shear body 32 are propulsion impellers with shearing teeth 6 fixedly arranged on their edges. By fixing the shearing teeth 6 on the edges of the propulsion impellers, axial flow can be generated while radially shearing the material, thereby achieving axial flow guidance and shearing simultaneously. This ensures comprehensive shearing of the material, improves the shearing effect, and guarantees the dispersion and emulsification effect.

[0040] like Figure 1 and 2As shown, the reducer assembly 4 includes a first gear 41, a second gear 42, a third gear 43, and a fourth gear 44. The first gear 41, which is fixedly connected to the end of the inner rotating shaft 22, is rotatably mounted on the bottom of the wall 1. The second gear 42, which meshes with the first gear 41, is rotatably mounted on the bottom of the wall 1. The third gear 43 is coaxially fixedly mounted on the third gear 43. The fourth gear 44, which meshes with the third gear 43, is fixedly mounted on the surface of the outer rotating shaft 31.

[0041] It should be noted that the number of teeth on the first gear 41 is less than or greater than that on the second gear 42, thereby increasing or decreasing the rotational speed through the gear ratio. The gear ratio of the first gear 41 and the second gear 42 can be specifically set using the gear ratio of existing speed reducers, which will not be elaborated upon here.

[0042] While the driving body 21 drives the inner rotating shaft 22 to rotate, the inner rotating shaft 22 drives the first gear 41 to rotate. The first gear 41 drives the meshing second gear 42 to rotate, which in turn drives the coaxial third gear 43 to rotate. This, in turn, drives the meshing fourth gear 44 to rotate. Simultaneously, the rotation of the fourth gear 44 drives the coaxial outer rotating shaft 31 to rotate. The speed reduction or increase can be achieved through the gear ratio between the first gear 41, the second gear 42, and the third gear 43. This causes the first upper shear body 23 and the first lower shear body 32 to rotate at different speeds, resulting in convective shearing. This forms an up-and-down circulating convective shearing mixture, causing the monomer droplets or polymer particles to be repeatedly torn and broken in the three-dimensional flow field. This helps to ensure the comprehensiveness of material shearing, thereby improving the shearing effect of the material and ensuring the dispersion and emulsification effect.

[0043] A second upper shear body 7 and a second lower shear body 8 are rotatably mounted on both sides of the first upper shear body 23 and the first lower shear body 32, respectively. It should be noted that the first upper shear body 23 and the second upper shear body 7, and the first lower shear body 32 and the second lower shear body 8, are synchronously driven by a connecting member 9. The connecting member 9 can be any structure in the prior art capable of transmission, such as a belt, chain, or gear.

[0044] It should be noted that the second upper shear body 7 has the same structure as the first upper shear body 23, and the second lower shear body 8 has the same structure as the first lower shear body 32.

[0045] Through the second upper dispersion and the second lower dispersion, during the convective shearing process of the first upper dispersion 2 and the first lower dispersion 3, the second upper dispersion and the second lower dispersion simultaneously shear on both sides and guide the material to form a circulation, that is, the two sides flow up and down respectively and the middle flows in opposite directions, so that the raw material can circulate as a whole to form a complex three-dimensional flow field and convective shear impact at the axis, thereby ensuring the comprehensiveness of material shearing, thus improving the shearing effect of the material and ensuring the dispersion and emulsification effect.

[0046] During the dispersion and emulsification of the acrylic polymer, the drive unit 21 drives the inner rotating shaft 22 and the first upper shear body 23 to rotate and shear through the shearing teeth 6. As the inner rotating shaft 22 rotates, it drives the first gear 41 to rotate. The first gear 41 drives the meshing second gear 42 to rotate, which in turn drives the coaxial third gear 43 to rotate. This, in turn, causes the third gear 43 to drive the meshing fourth gear 44 to rotate, and simultaneously, the fourth gear 44 drives the coaxial outer gear... The rotating shaft 31 rotates, and the gear ratio between the first gear 41, the second gear 42 and the third gear 43 can reduce or increase the speed of the first lower shear body 32 for shearing. This achieves differential rotation of the first upper shear body 23 and the first lower shear body 32. Combined with the opposing arrangement of the first upper shear body 23 and the first lower shear body 32, differential convection shearing is formed, which causes the monomer droplets or polymer particles to be repeatedly torn and broken in the three-dimensional flow field. This helps to ensure the comprehensiveness of material shearing, thereby improving the shearing effect of the material and ensuring the dispersion and emulsification effect.

[0047] During the differential rotation and convection shearing process of the first upper shear body 23 and the first lower shear body 32, the upper fixed body 25 and the lower fixed body 34 can also constrain the flow field, so that the acrylic polymer can be repeatedly guided through the lower fixed body 34 and repeatedly subjected to shearing by the first lower shear body 32, thereby improving the uniformity of dispersion and improving the dispersion and emulsification effect. The edge teeth 51 of the through groove 5 generate shearing and tearing effects on the raw material, and in conjunction with the first upper dispersion body 2 or the first lower dispersion body 3, multi-stage shearing is achieved, thereby improving the dispersion and emulsification effect.

[0048] During the differential rotation and convective shearing process of the first upper shear body 23 and the first lower shear body 32, they can also cooperate with the second upper shear body 7 and the second lower shear body 8 to form vertical flow on both sides and counterflow in the middle. This allows the raw material to circulate as a whole, forming a complex three-dimensional flow field and convective shearing impact at the axis, thereby ensuring the comprehensiveness of material shearing and improving the shearing effect of the material, thus ensuring the effect of dispersion and emulsification.

[0049] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A dispersion and emulsification apparatus for an acrylic polymer, comprising a wall (1) and a dispersion structure, wherein the dispersion structure is axially rotatably mounted within the wall (1), characterized in that: The dispersion structure includes a first upper dispersion body (2) and a first lower dispersion body (3). The first upper dispersion body (2) is rotatably mounted at the center of the wall (1). The first lower dispersion body (3) is rotatably mounted on the radial outer side of the first upper dispersion body (2). A speed reducer assembly (4) is fixedly connected below both the first upper dispersion body (2) and the first lower dispersion body (3). The first upper dispersion body (2) and the first lower dispersion body (3) rotate radially coaxially at a differential speed.

2. The dispersion and emulsification apparatus for acrylic polymer according to claim 1, characterized in that: The first upper dispersion body (2) includes a driving body (21), an inner rotating shaft (22) and a first upper shear body (23). The driving body (21) is fixedly installed on the top of the wall (1). The inner rotating shaft (22) driven by the driving body (21) is rotatably installed inside the wall (1). The first upper shear body (23) is fixedly installed on the surface of the inner rotating shaft (22).

3. The dispersion and emulsification apparatus for acrylic polymer according to claim 2, characterized in that: The first upper dispersion body (2) further includes an upper fixed shaft (24) and an upper fixed body (25). The surface of the wall (1) is fixedly arranged in an annular array along the inner rotating shaft (22) with at least two upper fixed shafts (24). The upper fixed body (25) is fixedly installed at the end of the upper fixed shaft (24). The first upper shear body (23) is located inside the upper fixed body (25).

4. The dispersion and emulsification apparatus for an acrylic polymer according to claim 3, characterized in that: The first lower dispersion body (3) includes an outer rotating shaft (31) and a first lower shear body (32). The outer rotating shaft (31) is rotatably installed on the inner wall of the bottom of the wall body (1) on the radially outer side of the inner rotating shaft (22) and the first lower shear body (32) is fixedly installed on the surface of the outer rotating shaft (31) below the first upper shear body (23).

5. The dispersion and emulsification apparatus for an acrylic polymer according to claim 4, characterized in that: The first lower dispersion body (3) further includes a lower fixed shaft (33) and a lower fixed body (34). The surface of the wall (1) is arranged in a ring with at least two lower fixed shafts (33) along the outer rotating shaft (31). The lower fixed body (34) is fixedly installed at the end of the lower fixed shaft (33).

6. The dispersion and emulsification apparatus for an acrylic polymer according to claim 5, characterized in that: Both the upper fixing body (25) and the lower fixing body (34) are cylindrical structures, and both the upper fixing body (25) and the lower fixing body (34) have through grooves (5) on their surfaces.

7. The dispersion and emulsification apparatus for an acrylic polymer according to claim 6, characterized in that: Both the first upper shear body (23) and the first lower shear body (32) are propulsion impellers with shearing teeth (6) fixed on the edge.

8. The dispersion and emulsification apparatus for an acrylic polymer according to claim 7, characterized in that: The reducer assembly (4) includes a first gear (41), a second gear (42), a third gear (43), and a fourth gear (44). The bottom of the wall (1) is rotatably mounted with the first gear (41) fixedly connected to the end of the inner rotating shaft (22). The bottom of the wall (1) is rotatably mounted with the second gear (42) meshing with the first gear (41). The third gear (43) is coaxially fixedly mounted with the third gear (43). The surface of the outer rotating shaft (31) is fixedly mounted with the fourth gear (44) meshing with the third gear (43).

9. The dispersion and emulsification apparatus for an acrylic polymer according to claim 8, characterized in that: The first upper dispersion (2) and the first lower dispersion (3) are respectively rotatably mounted with a second upper shear body (7) and a second lower shear body (8).

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