A reaction kettle with helical flow guide stirring mechanism

Abstract

The utility model discloses a reaction kettle with helical flow guide type stirring mechanism belongs to reaction kettle technical field, this reaction kettle includes kettle body and stirring subassembly, and stirring subassembly includes stirring motor, stirring shaft and helical blade, and the kettle body inner wall is connected with the flow guide cylinder, and the flow guide cylinder is equipped with in stirring shaft and helical blade outside, and the kettle body inner wall is connected with the first baffle of vertical setting, and the first baffle includes first board body and second board body, and the first board body is linear, and the second board body is S shape. The utility model discloses to the fast mixing speed of precursor solution in kettle body, eliminates concentration gradient, shortens the time for use of homogenization, and the gas bubble is reduced and is involved. The liquid of kettle body is collided with S shape second board body and forms turbulent flow, promotes the radial movement of fluid, and reduces the mixing dead angle. The fourth board body and second board body jointly strengthen turbulent flow, promote the radial movement of fluid, and further reduce the mixing dead angle.

Description

Technical Field

[0001] This utility model belongs to the field of reaction vessel technology, specifically relating to a reaction vessel with a spiral flow guiding stirring mechanism. Background Technology

[0002] Iron oxide pigments mainly refer to four types of coloring pigments based on iron oxides: iron oxide red, iron oxide yellow, iron oxide black, and iron oxide brown. The production process of iron oxide red and iron oxide yellow usually adopts a wet process. In the pre-processing stage of raw material preparation for the production of iron oxide pigments, it is necessary to stir and mix the precursor solution (such as ferrous sulfate) generated by the reaction of iron raw materials with acid to eliminate the concentration gradient and provide qualified raw materials for subsequent reactions. Existing paddle agitators and turbine agitators are prone to entrapping excessive air bubbles during stirring due to weak axial flow capacity or high shear force, resulting in uneven mixing or oxidation of the precursor solution. Utility Model Content

[0003] The technical problem solved by this invention is to provide a reaction vessel with a spiral flow guiding stirring mechanism to shorten the homogenization time of the precursor solution.

[0004] Technical solution: To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A reactor with a spiral flow-guiding stirring mechanism includes a reactor body and a stirring assembly disposed on the reactor body. The stirring assembly includes a stirring motor, a stirring shaft connected to the stirring motor, and spiral blades connected to the stirring shaft. A flow-guiding cylinder is connected to the inner wall of the reactor body and is sleeved outside the stirring shaft and spiral blades. A vertically arranged first baffle is connected to the inner wall of the reactor body. The first baffle includes a first plate and a second plate connected to the upper end of the first plate. The first plate is straight and the second plate is S-shaped.

[0006] Furthermore, the lower end of the first baffle is at the same height as the lower end of the guide tube, and the upper end of the first baffle is at a higher height than the upper end of the guide tube.

[0007] Furthermore, the height of the first plate is h1, the height of the first baffle is H1, and h1≥0.5H1.

[0008] Furthermore, multiple first baffles are provided, and the multiple first baffles are distributed in a ring array on the inner wall of the vessel.

[0009] Furthermore, the outer wall of the guide tube is connected to a vertically arranged second baffle. The second baffle includes a third plate and a fourth plate connected to the upper end of the third plate. The third plate is straight and the fourth plate is S-shaped.

[0010] Furthermore, the height of the third plate is h2, the height of the second baffle is H2, and h2≥0.5H2.

[0011] Furthermore, the height of the upper end of the first plate is higher than the height of the upper end of the third plate.

[0012] Furthermore, multiple second baffles are provided, and the multiple second baffles are distributed in a ring array on the outer wall of the guide tube.

[0013] Furthermore, the guide tube is provided with multiple through holes.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0015] 1. By setting a stirring assembly with spiral blades inside the vessel and correspondingly setting a guide tube, the spiral blades form a downward axial flow when working, which drives the liquid to circulate inside the vessel. This results in a fast mixing speed of the precursor solution inside the vessel, eliminates the concentration gradient, shortens the homogenization time, and reduces the entrainment of air bubbles.

[0016] 2. A first baffle is installed on the inner wall of the vessel. The first baffle includes a straight first plate and an S-shaped second plate. The upward liquid inside the vessel collides with the S-shaped second plate to form turbulence, which promotes the radial movement of the fluid and reduces the mixing dead zone.

[0017] 3. A second baffle is installed on the outer wall of the guide tube. The second baffle includes a straight third plate and an S-shaped fourth plate. The fourth plate and the second plate work together to enhance turbulence, promote the radial movement of the fluid, and further reduce the mixing dead zone.

[0018] 4. The guide tube is equipped with through holes to allow some liquid to move radially, which, in conjunction with the fourth plate and the second plate, improves the radial mixing of the liquid and reduces the mixing dead zone on the inner wall of the vessel. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the first baffle structure in the embodiment;

[0021] Figure 3 This is a schematic diagram of the second baffle structure in the embodiment;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the guide tube in the embodiment. Detailed Implementation

[0023] The present invention will be further illustrated below with reference to specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0024] like Figure 1 As shown, a reactor with a spiral flow-guiding stirring mechanism includes a reactor body 1 and a stirring assembly 2. The reactor body 1 is a vertical cylindrical reactor body with a feed inlet 11 at the upper end and a discharge outlet 12 at the lower end. A discharge valve is provided on the discharge outlet 12 to control its opening and closing. The stirring assembly 2 is also installed on the reactor body 1. In the wet process of producing iron oxide pigment, the filtered ferrous sulfate or ferrous nitrate precursor solution enters the reactor body 1 through the feed inlet 11. After being stirred by the stirring assembly 2, the raw material concentration gradient is eliminated, and the solution concentration and pH value can be adjusted within the reactor body 1, providing a stable and controllable reaction environment for subsequent chemical reactions (oxidation or precipitation reactions).

[0025] like Figure 1 As shown, the stirring assembly 2 includes a stirring motor 21, a stirring shaft 22, and a spiral blade 23. The stirring motor 21 is mounted on the outer top wall of the vessel body 1. The stirring motor 21 is an existing geared motor. The stirring shaft 22 is connected to the stirring motor 21 via a coupling. The stirring shaft 22 penetrates downward through the top wall of the vessel body 1 and enters the vessel body 1. The spiral blade 23 is connected to the outer wall at the lower end of the stirring shaft 22. The spiral blade 23 is an existing stainless steel spiral blade.

[0026] like Figure 1 and Figure 4 As shown, a guide tube 3 is connected to the inner wall of the vessel body 1. The guide tube 3 is a cylindrical shape with openings at the top and bottom. The upper end of the guide tube 3 is connected to the inner wall of the vessel body 1 through two connecting rods 31. The guide tube 3 is sleeved outside the stirring shaft 22 and the spiral blade 23. The inner diameter of the guide tube 3 is larger than the outer diameter of the circle in which the spiral blade 23 is projected in the plane. The lower end of the guide tube 3 is higher than the lower end of the stirring shaft 22. When the stirring motor 21 is working, it drives the spiral blades 23 to rotate through the stirring shaft 22. When the spiral blades 23 rotate, a strong axial flow is formed in the guide tube 3. The axial flow is downward, which drives the liquid downward. The bottom wall of the vessel body 1 is arc-shaped. The downward liquid flow is blocked and guided by the bottom wall of the vessel body 1 to flow upward. An upward axial flow is formed between the outer wall of the guide tube 3 and the inner wall of the vessel body 1. After the liquid reaches the top of the guide tube 3, it returns to the guide tube 3 and continues to be transported downward. In the precursor solution mixing step, the ferrous sulfate or ferrous nitrate precursor solution is rapidly mixed, eliminating the concentration gradient and shortening the homogenization time. Furthermore, since the shear force of the spiral blades 23 is smaller than that of the paddle agitator and turbine agitator during transport, the entrainment of air bubbles is reduced.

[0027] like Figure 1 , Figure 2 and Figure 4 As shown, a first baffle 4 is connected to the inner wall of the vessel body 1. The first baffle 4 is vertically arranged, and the height of the lower end of the first baffle 4 is equal to the height of the lower end of the guide tube 3. The height of the upper end of the first baffle 4 is higher than the height of the upper end of the guide tube 3. When the liquid moves upward between the outer wall of the guide tube 3 and the inner wall of the vessel 1, the first baffle 4 acts as a guide. The first baffle 4 includes a first plate 41 and a second plate 42. The first plate 41 is straight and extends from the inner wall of the vessel 1 to the center line of the vessel 1. The second plate 42 is connected to the upper end of the first plate 41 and is S-shaped. The height of the first plate 41 is h1, and the height of the first baffle 4 is H1, where h1 ≥ 0.5H1. In this embodiment, h1 = 0.5H1. When the liquid moves upward between the outer wall of the guide tube 3 and the inner wall of the vessel 1, when it passes through the section where the first plate 41 is located, the upward liquid forms a vertical laminar flow. When it passes through the section where the second plate 42 is located, due to the collision between the upward liquid and the S-shaped second plate 42, turbulence is formed between the outer wall of the guide tube 3 and the inner wall of the vessel 1, which promotes the radial movement of the fluid between the outer wall of the guide tube 3 and the inner wall of the vessel 1 and reduces the mixing dead angle. Multiple first baffles 4 are provided. In this embodiment, six are provided. The six first baffles 4 are arranged in a ring array on the inner wall of the vessel body 1, so that the liquid in the area corresponding to the second plate 42 inside the vessel body 1 forms turbulence. The upper end of the first baffle 4 is higher than the upper end of the guide tube 3, so that there is also a turbulent area above the guide tube 3, reducing the dead corners on the inner wall of the vessel body 1.

[0028] like Figure 1 , Figure 3 and Figure 4As shown, a second baffle 5 is connected to the outer wall of the guide tube 3. The second baffle 5 is vertically arranged and its shape is similar to that of the first baffle 4. The second baffle 5 includes a third plate body 51 and a fourth plate body 52. ​​The third plate body 51 is straight and extends radially outward from the outer wall of the guide tube 3. The fourth plate body 52 is connected to the upper end of the third plate body 51 and is S-shaped. The height of the third plate 51 is h2, and the height of the second baffle 5 is H2, where h2 ≥ 0.5H2. In this embodiment, h2 = 0.5H2. When the liquid moves upward between the outer wall of the guide tube 3 and the inner wall of the vessel 1, it forms a vertical laminar flow when passing through the section containing the third plate 51. When passing through the section containing the fourth plate 52, the upward liquid collides with the S-shaped fourth plate 52, creating turbulence between the outer wall of the guide tube 3 and the inner wall of the vessel 1. This promotes the radial movement of the fluid between the outer wall of the guide tube 3 and the inner wall of the vessel 1, reducing the mixing dead zone. Multiple second baffles 5 are provided; in this embodiment, five are provided. The five second baffles 5 are arranged in a ring array on the outer wall of the guide tube 3, thereby creating turbulence in the liquid in the area corresponding to the fourth plate 52 within the vessel 1. The upper end of the first plate 41 is higher than the upper end of the third plate 51. When the liquid moves upward in the lower region of the vessel 1 (corresponding to the regions of the first plate 41 and the third plate 51), the liquid is impacted by the upward liquid flow from the bottom wall of the vessel 1, resulting in thorough mixing and fewer dead zones. The fourth plate 52 works together with the second plate 42 to enhance the turbulence in the upper region (corresponding to the regions of the second plate 42 and the fourth plate 52), making the liquid mix more thoroughly.

[0029] like Figure 1 and Figure 4 As shown, the guide tube 3 is provided with multiple through holes 301. Multiple through holes 301 are arranged in multiple layers on the upper and lower sides of the side wall of the guide tube 3. The multiple through holes 301 in each layer are arranged in a ring array. The through holes 301 are located in the upper part of the guide tube 3 and the area corresponding to the fourth plate 52. The through holes 301 allow some liquid to move radially. In conjunction with the fourth plate 52 and the second plate 42, the radial movement of turbulence is enhanced, the radial mixing of liquid between the outer wall of the guide tube 3 and the inner wall of the vessel 1 is improved, and the mixing dead angle at the inner wall of the vessel 1 is reduced.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A reaction vessel with a spiral flow-guiding stirring mechanism, characterized in that, The apparatus includes a vessel body (1) and a stirring assembly (2) disposed on the vessel body (1). The stirring assembly (2) includes a stirring motor (21), a stirring shaft (22) connected to the stirring motor (21), and a spiral blade (23) connected to the stirring shaft (22). A guide tube (3) is connected to the inner wall of the vessel body (1). The guide tube (3) is sleeved outside the stirring shaft (22) and the spiral blade (23). A vertically arranged first baffle (4) is connected to the inner wall of the vessel body (1). The first baffle (4) includes a first plate (41) and a second plate (42) connected to the upper end of the first plate (41). The first plate (41) is straight, and the second plate (42) is S-shaped.

2. The reactor with a spiral flow-guiding stirring mechanism according to claim 1, characterized in that, The lower end of the first baffle (4) is at the same height as the lower end of the guide tube (3), and the upper end of the first baffle (4) is higher than the upper end of the guide tube (3).

3. The reactor with a spiral flow-guiding stirring mechanism according to claim 2, characterized in that, The height of the first plate (41) is h1, and the height of the first baffle (4) is H1, where h1 ≥ 0.5H1.

4. The reactor with a spiral flow-guiding stirring mechanism according to claim 1, characterized in that, Multiple first baffles (4) are provided, and the multiple first baffles (4) are arranged in a ring array on the inner wall of the vessel body (1).

5. The reactor with a spiral flow-guiding stirring mechanism according to claim 1, characterized in that, The outer wall of the guide tube (3) is connected to a vertically arranged second baffle (5). The second baffle (5) includes a third plate (51) and a fourth plate (52) connected to the upper end of the third plate (51). The third plate (51) is straight and the fourth plate (52) is S-shaped.

6. The reactor with a spiral flow-guiding stirring mechanism according to claim 5, characterized in that, The height of the third plate (51) is h2, and the height of the second baffle (5) is H2, where h2 ≥ 0.5H2.

7. The reactor with a spiral flow-guiding stirring mechanism according to claim 5, characterized in that, The height of the upper end of the first plate (41) is higher than the height of the upper end of the third plate (51).

8. The reactor with a spiral flow-guiding stirring mechanism according to claim 5, characterized in that, Multiple second baffles (5) are provided, and the multiple second baffles (5) are arranged in a ring array on the outer wall of the guide tube (3).

9. The reactor with a spiral flow-guiding stirring mechanism according to claim 1, characterized in that, The guide tube (3) is provided with multiple through holes (301).

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