Coating mixer

Abstract

The utility model discloses a coating mixer which comprises a tank body and an upper end cover, a feeding pipe is fixedly arranged at the bottom of the tank body, and a stirrer is arranged in the tank body; the side wall of the tank body is sequentially connected with a lower reagent adding pipe, an upper reagent adding pipe and a discharging pipe from bottom to top, a flow limiting ring is fixedly arranged in the tank body between the lower reagent adding pipe and the upper reagent adding pipe, and the inner diameter of the flow limiting ring is smaller than that of the tank body; the stirrer is provided with two longitudinal paddles, and the heights of the two paddles respectively correspond to the heights of the lower reagent adding tube and the upper reagent adding tube; according to the utility model, the mixing uniformity of a material and a coating agent can be improved, self-nucleation precipitation is prevented, and the coating quality is improved.

Description

Technical Field

[0001] The utility model relates to a coating mixer, in particular to a coating mixer used in titanium dioxide silicon aluminum coating process. Background Art

[0002] Titanium dioxide, characterized by its non-toxicity, optimal whiteness, opacity, and brightness, is currently the world's highest-performing white pigment and is widely used in industries such as coatings, plastics, and papermaking. However, TiO2 particles inherently possess lattice defects. After absorbing ultraviolet energy, oxygen atoms in the lattice tend to lose two electrons, releasing highly reactive oxygen radicals. These free radicals oxidize and decompose organic matter in contact with the titanium dioxide, causing a series of physical and chemical changes in the coating, such as yellowing, gloss loss, and chalking, which impacts product lifespan. Therefore, to achieve stable titanium dioxide performance, a coating treatment is necessary to prevent or reduce the effects of reactive oxygen species on surrounding substances, thereby improving the product's weather resistance and enhancing the titanium dioxide's dispersibility in organic media.

[0003] At present, the common inorganic wet coating of titanium dioxide usually adopts the intermittent batch coating process in the coating tank. Since the coating tank is large, usually the volume of the coating tank is about 110m3, the coating agent cannot be quickly mixed and evenly added. Especially in high-viscosity systems such as silicon-aluminum coating, the viscosity of the slurry increases significantly after the addition of sodium silicate, which easily leads to local over-concentration of the coating agent and self-nucleation precipitation, making it impossible to evenly coat the surface of the titanium dioxide, affecting the weather resistance of the product. Summary of the Invention

[0004] The purpose of the utility model is to provide a coating mixer to address the deficiencies of the prior art, which can improve the uniformity of mixing of materials and coating agents, prevent self-nucleation and precipitation, and improve coating quality.

[0005] To achieve the above-mentioned object, the utility model provides a film-coated mixer, comprising a tank body and an upper end cover. A feed pipe is fixedly provided at the bottom of the tank body, and an agitator is provided in the tank body. The utility model is characterized in that: a lower reagent addition pipe, an upper reagent addition pipe and a discharge pipe are sequentially connected to the side wall of the tank body from bottom to top, a flow limiting ring is fixedly provided in the tank body between the lower reagent addition pipe and the upper reagent addition pipe, and the inner diameter of the flow limiting ring is smaller than the inner diameter of the tank body; the agitator is provided with two longitudinally arranged blades, and the heights of the two blades correspond to the heights of the lower reagent addition pipe and the upper reagent addition pipe, respectively;

[0006] The utility model divides the tank into two chambers by a flow-limiting ring. The material is added through a feed pipe, the coating agent enters from a lower reagent adding pipe, and the pH regulator enters from an upper reagent adding pipe. The flow-limiting ring can increase the residence time of the material and the coating agent and mix them in sequence. The two paddles help to quickly mix, thereby improving the uniformity of the mixing of the material and the two reagents, preventing self-nucleation and precipitation, and improving the coating quality.

[0007] As a further improvement of the present invention, the inner wall of the tank is fixedly connected with a plurality of longitudinal baffles evenly distributed in the circumferential direction; this can further improve the mixing uniformity and mixing speed;

[0008] As a further improvement of the present invention, a pH meter is provided in the discharge pipe; the pH value of the discharged material can be detected in time and the amount of pH regulator introduced can be adjusted;

[0009] As a further improvement of the present invention, a rubber sleeve is fixedly provided on the inner wall of the tank body; this ensures that the properties of the material in the tank are not affected;

[0010] As a further improvement of the present invention, the upper reagent adding pipe and the discharging pipe are arranged on two opposite side walls of the tank body, further improving the uniformity of mixing;

[0011] In summary, the utility model can improve the uniformity of mixing of materials and coating agents, prevent self-nucleation and precipitation, and improve coating quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the embodiment of the present utility model.

[0013] Figure 2 for Figure 1 sectional view of .

[0014] Figure 3 for Figure 2 AA cross-sectional view. DETAILED DESCRIPTION

[0015] In order to more clearly understand the purpose, technical solutions and beneficial effects of the present invention, the present invention is further described below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following embodiments.

[0016] like Figures 1 to 3 As shown, a coating mixer of this embodiment includes a tank body 1 and an upper end cover 2. A feed pipe 3 is fixedly provided at the bottom of the tank body 1. A rubber sleeve 4 is fixedly provided on the inner wall of the tank body and is fixedly connected to four longitudinal baffles 5 uniformly distributed in the circumferential direction. A stirrer 6 is provided in the tank body 1, and the stirrer 6 is provided with two longitudinally arranged paddles 7 and 8; the side walls of the tank body 1 are sequentially connected with a lower reagent addition pipe 9, an upper reagent addition pipe 10 and a discharge pipe 11 from bottom to top, and the heights of the two paddles 7 and 8 correspond to the heights of the lower reagent addition pipe 9 and the upper reagent addition pipe 10, respectively. The upper reagent addition pipe 10 and the discharge pipe 11 are provided on opposite side walls of the tank body 1. An online pH meter 12 is provided in the discharge pipe 11. A flow limiting ring 13 is fixedly provided in the tank body 1 between the lower reagent addition pipe 9 and the upper reagent addition pipe 10. The inner diameter of the flow limiting ring 13 is smaller than the inner diameter of the tank body 1.

[0017] When the utility model is used for silicon-aluminum coating of titanium dioxide, titanium dioxide slurry is added through the feed pipe 3, the coating agent enters from the lower reagent adding pipe 9, and the pH regulator enters from the upper reagent adding pipe 10. The tank body 1 is divided into two chambers by the flow limiting ring 13, which can increase the residence time of the titanium dioxide slurry and the coating agent in the lower chamber, so that the titanium dioxide slurry, the coating agent and the pH regulator are mixed in sequence. The heights of the two blades 7 and 8 correspond to the heights of the lower reagent adding pipe 9 and the upper reagent adding pipe 10, respectively, which is conducive to rapid mixing. Adding several longitudinal baffles 5 can further improve the mixing uniformity and mixing speed, thereby improving the uniformity of mixing of the material and the two reagents, preventing self-nucleation and precipitation, and improving the coating quality; the online pH meter 12 can timely detect the pH value of the discharged material, thereby adjusting the amount of pH regulator introduced; the rubber sleeve 4 can ensure that the characteristics of the material in the tank are not affected.

Claims

1. A film-coated mixer, comprising a tank body, an upper end cover, a feed pipe fixedly provided at the bottom of the tank body, and an agitator provided inside the tank body; characterized in that: The side walls of the tank body are connected with a lower reagent addition pipe, an upper reagent addition pipe and a discharge pipe in sequence from bottom to top. A flow limiting ring is fixedly provided in the tank body between the lower reagent addition pipe and the upper reagent addition pipe. The inner diameter of the flow limiting ring is smaller than the inner diameter of the tank body. The agitator is provided with two longitudinally arranged blades, and the heights of the two blades correspond to the heights of the lower reagent addition pipe and the upper reagent addition pipe respectively.

2. A coating mixer according to claim 1, characterized in that: The inner wall of the tank body is fixedly connected with a plurality of longitudinal baffles uniformly distributed in the circumferential direction.

3. A coating mixer according to claim 1 or 2, characterized in that: A pH meter is provided in the discharge pipe.

4. A coating mixer according to claim 3, characterized in that: The inner wall of the tank is provided with a rubber sleeve.

5. A coating mixer according to claim 4, characterized in that: The upper reagent adding pipe and the material discharging pipe are arranged on two opposite side walls of the tank body.

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