A reverse spiral groove stirring tank for improving the uniformity of mixing masterbatch and titanium dioxide

Abstract

This paper proposes a reverse spiral groove mixing reactor for improving the uniformity of titanium dioxide mixing in masterbatch. The reverse spiral groove mixing reactor includes a reactor body and a mixing device. The reactor body has a feed inlet at the top and a discharge outlet at the bottom. The inner wall of the reactor body is equipped with a spiral baffle. The mixing device includes a mixing motor, a mixing roller, and mixing blades. The mixing motor is located above the reactor body and is connected to the mixing roller via a coupling. The mixing roller is connected to the mixing blades and placed inside the reactor body. Each mixing blade has a reverse spiral groove at its center. The combination of the mixing blades with reverse spiral grooves and the spiral baffle significantly enhances material agitation, greatly improves the uniformity of titanium dioxide mixing in masterbatch, increases mixing efficiency, and thus improves production quality and efficiency.

Description

Technical Field

[0001] This article belongs to the technical field of color masterbatch production equipment, specifically involving a reverse spiral groove stirring kettle for improving the uniformity of titanium dioxide mixing in color masterbatch. Background Technology

[0002] In the production process of color masterbatch, titanium dioxide, as an important white pigment, is a key step in mixing with carrier resin, dispersant, and additives to form a uniform slurry. The uniformity of mixing directly affects the coloring effect, hiding power, and subsequent processing performance of the color masterbatch, as well as other product quality indicators.

[0003] Currently, the mixing tanks used for slurrying titanium dioxide powder for color masterbatch typically employ a traditional mixing structure. The mixing blades rotate under the drive of the mixing shaft, causing the material to flow and mix within the tank. However, in actual production, this traditional mixing tank presents several problems. Titanium dioxide has a high density and is prone to agglomeration, while other powders often have significantly different physical properties such as density and particle size. During traditional mixing, due to the lack of effective convection and shearing, titanium dioxide particles tend to settle to the bottom of the tank due to their own gravity, forming localized accumulations. Furthermore, the inner wall of traditional mixing tanks is usually a smooth surface, and the material mainly flows in a single direction during mixing, forming a relatively regular flow field. This results in weak relative motion between materials and insufficient shearing force, leading to a large number of unevenly dispersed titanium dioxide particle clumps in the mixed slurry, which affects the color uniformity and stability of the color masterbatch.

[0004] Furthermore, existing mixing tanks have low mixing efficiency. To achieve a certain mixing effect, it is often necessary to extend the mixing time, which not only increases energy consumption but may also cause the material temperature to rise due to prolonged mixing, affecting the physicochemical properties of the material and thus adversely affecting the quality of the masterbatch. At the same time, uneven mixing can easily lead to defects such as color difference and spots in the produced masterbatch during subsequent processing, reducing the product qualification rate and market competitiveness. Therefore, developing a mixing tank that can improve the mixing uniformity of titanium dioxide and powder in masterbatch has become an urgent problem to be solved in the current masterbatch production field. Utility Model Content

[0005] To address the aforementioned issues, this paper proposes a reverse spiral groove mixing reactor for improving the uniformity of titanium dioxide mixing in masterbatch. The reactor comprises a reactor body and a mixing device. The reactor body has a feed inlet at the top and a discharge outlet at the bottom. A spiral baffle is installed on the inner wall of the reactor body. The mixing device includes a mixing motor, a mixing roller, and mixing blades. The mixing motor is positioned above the reactor body and connected to the mixing roller via a coupling. The mixing roller is connected to the mixing blades and placed inside the reactor body. Each mixing blade has a reverse spiral groove at its center. This unique structural design enhances the force exerted on the material during mixing, further improving the mixing effect and mixing quality.

[0006] The spiral baffles are evenly distributed in a spiral shape along the inner wall of the stirred tank. The spiral direction of the spiral baffles is opposite to the rotation direction of the stirring blades. The purpose of this reverse arrangement is to generate a more complex fluid dynamic effect through the difference in motion between the two, so as to avoid the problem of uneven local mixing, thereby optimizing the overall stirring effect and effectively improving the mixing efficiency and uniformity during the stirring process.

[0007] The mixing vessel is equipped with a grid frame on top, and the mixing motor is placed on top of the grid frame. The top of the mixing vessel below the center of the grid frame has a mixing shaft insertion hole. The mixing roller and mixing blade are placed inside the mixing vessel through the mixing shaft insertion hole. The mixing roller and mixing blade are precisely placed inside the mixing vessel through this mixing shaft insertion hole, thereby ensuring that the mixing device can operate normally and complete the task of fully mixing and blending the materials in the vessel.

[0008] The stirring blades are evenly distributed along the axial direction of the stirring roller. Reinforcing ribs are located below the stirring blades, and a reverse spiral groove is located at the center of each blade, extending from the top to the bottom. This reinforcement structure significantly improves the overall strength of the stirring blades and reduces the risk of deformation due to prolonged use or high-intensity operation, thus extending the equipment's service life. Furthermore, the reverse spiral groove at the center of each blade, extending from the top to the bottom, forms a complete reverse spiral structure, optimizing the material flow path and further improving stirring efficiency. It also reduces material accumulation or stagnation during stirring, making the entire stirring process smoother and more efficient.

[0009] The inner wall of the mixing vessel is equipped with an anti-corrosion layer, which has excellent protective performance and can effectively prevent materials from directly contacting the mixing vessel body, thereby avoiding the corrosion effect of materials on the mixing vessel body. This greatly extends the overall service life of the mixing vessel, allowing it to function stably and continuously in industrial production and other scenarios.

[0010] Beneficial effects:

[0011] By combining the spiral baffle with the anti-spiral grooved blades in reverse, the traditional stable flow field is broken, forming complex convection and turbulence. This solves the problems of insufficient mixing and local aggregation of titanium dioxide and masterbatch, improves the mixing degree, and significantly enhances the stability of product quality.

[0012] By adding reinforcing ribs under the agitator blades, the structural strength of the agitator blades can be effectively enhanced. During the agitation process, the agitator blades are subjected to various forces such as the impact force of the material and the centrifugal force generated by high-speed rotation, which can easily cause deformation or even breakage. The presence of reinforcing ribs disperses these forces, reduces the risk of blade damage, extends the service life of the agitator, and improves the stability and continuity of the production process.

[0013] The mixing vessel is equipped with an anti-corrosion layer inside. This layer effectively isolates the material from direct contact with the inner wall of the vessel, resisting the corrosive effects of the material, greatly extending the service life of the mixing vessel, reducing the frequency of equipment replacement, lowering the company's equipment investment costs, and ensuring the safety of the production process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a reverse spiral groove stirring vessel for improving the uniformity of mixing masterbatch and titanium dioxide;

[0015] Figure 2 This is a cross-sectional view of a reverse spiral groove stirring vessel used to improve the uniformity of mixing masterbatch and titanium dioxide.

[0016] Figure 3 This is a top view of a reverse spiral groove stirring vessel used to improve the uniformity of mixing masterbatch and titanium dioxide.

[0017] Figure 4 This is a schematic diagram of the stirring paddle in a reverse spiral groove stirring vessel for improving the uniformity of mixing masterbatch and titanium dioxide.

[0018] In the diagram: 1. Mixing vessel body, 2. Feed inlet, 3. Discharge outlet, 4. Mixing motor, 5. Grid frame, 6. Spiral baffle, 7. Mixing roller, 8. Mixing blade. Detailed Implementation

[0019] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0020] 1. Mixing vessel body; 2. Feed inlet; 3. Discharge outlet; 4. Mixing motor; 5. Grid frame; 6. Spiral baffle; 7. Mixing roller; 8. Mixing blade.

[0021] like Figure 1 , 2 As shown in Figures 3 and 4;

[0022] A reverse spiral groove mixing vessel for improving the uniformity of titanium dioxide masterbatch mixing, comprising a vessel body 1 and a mixing device, wherein the vessel body 1 has a feed inlet 2 at the top and a discharge outlet 3 at the bottom, and a spiral baffle 6 on the inner wall of the vessel body 1, and the mixing device includes a mixing motor 4, a mixing roller 7, and mixing blades 8, wherein the mixing motor 4 is positioned above the vessel body 1 and is connected to the mixing roller 7 via a coupling, and the mixing roller 7 is connected to the mixing blades 8 and positioned inside the vessel body 1, wherein each mixing blade 8 has a reverse spiral groove at its center, and the spiral baffle 6 extends along the vessel body. The inner wall of the vessel body 1 is evenly distributed in a spiral shape. The spiral direction of the spiral baffle 6 is opposite to the rotation direction of the stirring blade 8. A grid frame 5 is provided above the vessel body 1, and a stirring motor 4 is placed above the grid frame 5. The top of the vessel body 1 below the center of the grid frame 5 is provided with a stirring shaft insertion hole. The stirring roller 7 and the stirring blade 8 are placed inside the vessel body 1 through the stirring shaft insertion hole. The stirring blade 8 is evenly distributed along the axial direction of the stirring roller 7. A reinforcing rib is provided below the stirring blade 8. A reverse spiral groove is provided in the center of the stirring blade 8. The reverse spiral groove extends from the top of the stirring blade 8 to the tail of the stirring blade 8. The inner wall of the vessel body 1 is provided with an anti-corrosion layer.

[0023] Implementation example;

[0024] Titanium dioxide and carrier resin are added into the mixing tank 1 through the feed inlet 3. The stirring motor 4 is started. The stirring motor 4 drives the stirring roller 7 and stirring blade 8 to rotate through the coupling. The stirring blade 8 drives the material to move. Since the rotation direction of the stirring blade 8 is opposite to the spiral direction of the spiral baffle 6, the material will be hindered and guided by the spiral baffle 6 during the movement, forming complex turbulence, so that the masterbatch titanium dioxide can be fully mixed. After the mixing is completed, the mixed material is discharged from the discharge outlet 3.

[0025] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A kind of anti-helical groove stirred tank for improving the mixing uniformity of color master batch titanium dioxide powder, characterized by, The aforementioned anti-spiral grooved mixing vessel includes a mixing vessel body and a mixing device. The mixing vessel body has a feed inlet at the top and a discharge outlet at the bottom. The inner wall of the mixing vessel body is provided with a spiral baffle. The mixing device includes a mixing motor, a mixing roller, and mixing blades. The mixing motor is located above the mixing vessel body and is connected to the mixing roller via a coupling. The mixing roller is connected to the mixing blades and is located inside the mixing vessel body. Each mixing blade has an anti-spiral groove at its center.

2. The anti-helix groove stirred tank for improving mixing uniformity of titanium dioxide in color master batch according to claim 1, characterized in that, The spiral baffles are evenly distributed in a spiral shape along the inner wall of the stirred tank, and the spiral direction of the spiral baffles is opposite to the rotation direction of the stirring blades.

3. The anti-helix groove stirred tank for improving mixing uniformity of titanium dioxide in color master batch according to claim 1, characterized in that, The mixing vessel is equipped with a grid frame on top of the vessel body, and a stirring motor is placed on top of the grid frame. The top of the mixing vessel body below the center of the grid frame is equipped with a stirring shaft insertion hole, and the stirring roller and stirring blade are placed inside the mixing vessel body through the stirring shaft insertion hole.

4. The anti-helix groove stirred tank for improving mixing uniformity of titanium dioxide in color master batch according to claim 1, characterized in that, The stirring blades are evenly distributed along the axial direction of the stirring roller, and reinforcing ribs are provided below the stirring blades. The center of the stirring blades is provided with a reverse spiral groove, which extends from the top of the stirring blades to the tail of the stirring blades.

5. The anti-spiral groove stirring vessel for improving the uniformity of mixing masterbatch and titanium dioxide according to claim 1, characterized in that, The inner wall of the stirring vessel is provided with an anti-corrosion layer.

Images