Anti-precipitation reaction kettle for organic chemical industry

Abstract

The utility model relates to the technical field of chemical reaction kettles, provides an anti-precipitation reaction kettle for organic chemical industry, and solves the problems that the existing reaction kettle is low in mixing efficiency due to design defects and is difficult to meet the requirements of upper and lower layers in the kettle. The reaction kettle comprises a kettle body, a baffle assembly is arranged in the kettle body, the baffle assembly comprises at least three baffles which are uniformly distributed around the axis of the kettle body, each baffle is provided with at least one flow guide area, and a plurality of flow guide holes are formed in each flow guide area; the flow guide assemblies are arranged on one sides of the flow guide areas of the baffles, each flow guide assembly comprises a valve plate and a reset torsion spring, and the valve plates are rotationally connected with the baffles through the reset torsion springs; the stirring assembly comprises an upper-layer stirrer and a lower-layer stirrer which are independently driven by split shafts; the upper-layer stirrer rotates at a high speed to generate radial flow and disperse particle aggregation, and the lower-layer stirrer rotates at a low speed to form axial wall-scraping flow to prevent bottom precipitation.

Description

Technical Field

[0001] This utility model relates to the field of chemical reaction vessel technology, specifically to an anti-precipitation reaction vessel for organic chemicals. Background Technology

[0002] In organic chemical production (such as polymer synthesis and high-solids-content slurry preparation), the stirring system of the reactor must simultaneously meet the requirements of efficient mixing, anti-sedimentation, and low energy consumption. However, while ordinary vertical baffles can break up fluid vortices, they cannot eliminate the dead zone behind the baffle, especially in high-viscosity materials (such as epoxy resin and silicone oil), where particles tend to accumulate behind the baffle, resulting in low mixing efficiency. Traditional single-shaft agitators, with their upper and lower blades rotating at the same speed and in the same direction, struggle to simultaneously meet the dispersion requirements of the upper layer and the anti-sedimentation requirements of the lower layer. Utility Model Content

[0003] Therefore, in view of the above problems, this utility model provides an anti-precipitation reaction vessel for organic chemical industry, which solves the problem that the existing reaction vessels have low mixing efficiency and difficulty in meeting the needs of the upper and lower layers in the vessel due to design defects.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] An anti-precipitation reaction vessel for organic chemicals includes a vessel body, wherein the vessel body is provided with:

[0006] A baffle assembly comprising at least three baffles evenly distributed around the axis of the vessel body, each baffle having at least one flow guiding area and each flow guiding area having a plurality of flow guiding holes;

[0007] A flow guiding assembly is disposed on one side of the flow guiding area of ​​each of the baffles. The flow guiding assembly includes a valve plate and a reset torsion spring. The valve plate is rotatably connected to the baffle through the reset torsion spring.

[0008] A mixing assembly, comprising an upper mixer and a lower mixer with independent split-shaft drives;

[0009] The drive assembly includes an upper motor and a lower motor, which independently drive the upper agitator and the lower agitator, respectively.

[0010] Furthermore, the valve plate has an airfoil-shaped surface on the side near the flow guide area, and the relationship between its radius of curvature R and the material's designed viscosity μ is: R = k·μ 0.5 , where 0.1≤k≤0.3.

[0011] Furthermore, the valve plate's flip angle θ ranges from 0° to 75°.

[0012] Furthermore, the upper agitator is a turbine-type agitator, and the lower agitator is an anchor-type agitator.

[0013] Furthermore, each of the described guide holes is an elongated oblique hole with an aspect ratio ≥3:1.

[0014] Furthermore, the axis of each of the guide holes forms an angle of 15°-45° with each of the baffles, and the inclination directions of adjacent guide holes alternately are opposite.

[0015] Furthermore, the speed ratio between the upper and lower agitators is 2:1 to 5:1, and the lower motor is equipped with an overload protection module that automatically reduces speed when the torque exceeds 150% of the rated value.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model, by setting guide holes on the baffle, forces the fluid to penetrate the baffle laterally, forming a high-intensity jet that directly scours the gap between the baffle and the vessel wall, greatly reducing the volume of the dead zone.

[0018] 2. This utility model achieves self-adjustment of valve opening by balancing the fluid pressure difference and the return torsion spring through the valve plate.

[0019] 3. This utility model uses a high-speed rotating upper agitator to generate radial flow, which disperses particle agglomeration, while a low-speed rotating lower agitator forms an axial wall-scraping flow to prevent sedimentation at the bottom. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the baffle structure in an embodiment of the present utility model;

[0022] Figure 3 for Figure 1 Enlarged structural diagram at point B;

[0023] Figure 4 for Figure 2 Enlarged structural diagram at point A in the middle.

[0024] Explanation of icon numbers

[0025] 1. Pot body;

[0026] Baffle assembly 2; Baffle 21; Guide zone 22; Guide hole 23; Airfoil surface 24;

[0027] Flow guide assembly 3; valve plate 31; reset torsion spring 32;

[0028] Mixing assembly 4; upper agitator 41; lower agitator 42;

[0029] Drive component 5; upper motor 51; lower motor 52. Detailed Implementation

[0030] The following will describe the implementation of this utility model in detail with reference to specific embodiments, so that the process of how this utility model uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0031] Example

[0032] like Figures 1 to 4 As shown, an anti-precipitation reaction vessel for organic chemicals includes a vessel body 1, wherein the vessel body 1 is equipped with:

[0033] Baffle assembly 2, the baffle assembly 2 includes four baffles 21 evenly distributed around the axis of the vessel body 1, each baffle 21 is provided with a flow guiding area 22, and each flow guiding area 22 is provided with a plurality of flow guiding holes 23;

[0034] The flow guiding component 3 is disposed on one side of the flow guiding area 22 of each of the baffles 21. The flow guiding component 3 includes a valve plate 31 and a reset torsion spring 32. The valve plate 31 is rotatably connected to the baffle 21 through the reset torsion spring 32.

[0035] The stirring assembly 4 includes an upper stirrer 41 and a lower stirrer 42, which are driven independently by separate shafts.

[0036] The drive assembly 5 includes an upper motor 51 and a lower motor 52, which independently drive the upper agitator 41 and the lower agitator 42, respectively.

[0037] By setting guide holes 23 on the baffle 21, the fluid is forced to penetrate the baffle 21 laterally to form a high-intensity jet, which directly scours the gap between the baffle and the vessel wall, greatly reducing the volume of the dead zone. The valve plate 31 achieves self-adjustment of the opening degree under the balance of fluid pressure difference and reset torsion spring 32.

[0038] The valve plate 31 has an airfoil-shaped curved surface 24 on the side near the flow guide area 22. The relationship between its radius of curvature R and the material design viscosity μ is: R = k·μ 0.5 Wherein, 0.1≤k≤0.3; wherein, the unit of material design viscosity μ is mPa·s, the curvature of the airfoil surface is positively correlated with the square root of viscosity, so that the fluid flow fits the curved surface, reducing boundary layer separation and reducing the drag coefficient. Compared with the planar valve plate, the airfoil design can reduce pressure loss and save more than 15% of stirring power. At the same time, the curved surface guides the fluid to smoothly change direction, avoiding particle deposition on the surface of valve plate 31.

[0039] The valve plate 31 has a flip angle θ ranging from 0° to 75°.

[0040] The upper agitator 41 is a turbine agitator, and the lower agitator 42 is an anchor agitator. The turbine agitator generates a strong radial flow to disperse particle agglomeration, while the anchor agitator provides an axial wall-scraping flow to eliminate sedimentation at the bottom of the vessel. The combination of the turbine agitator and the anchor agitator reduces energy consumption per unit output.

[0041] Each of the aforementioned guide holes 23 is an elongated oblique hole with a length-to-width ratio of 3:1; the elongated holes constrain the direction of the fluid, increase the jet velocity, and increase the penetration distance to the center of the vessel.

[0042] The axis of each of the guide holes 23 forms a 30° angle with each of the baffles 21, and the tilting directions of adjacent guide holes 23 alternately are opposite; the alternating tilting holes generate a vortex effect, dividing the inside of the vessel into multiple micro-circulation units, shortening the mixing time, and the staggered jets counteract the reverse torque, reducing the load fluctuation of the upper and lower motors from ±20% to ±3%.

[0043] The speed ratio between the upper agitator 41 and the lower agitator 42 is 2:1 to 5:1. The lower motor 52 is equipped with an overload protection module (not shown in the figure). When the torque is greater than 150% of the rated value, it automatically reduces the speed. The overload protection module adopts a friction clutch, which can be purchased on the market and will not be described in detail here. Different speed ratios are used to adapt to different viscous materials. This embodiment does not make specific limitations and can be adjusted according to the actual situation.

[0044] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. An anti-precipitation reaction vessel for organic chemicals, comprising a vessel body, characterized in that, The vessel body is equipped with: A baffle assembly comprising at least three baffles evenly distributed around the axis of the vessel body, each baffle having at least one flow guiding area and each flow guiding area having a plurality of flow guiding holes; A flow guiding assembly is disposed on one side of the flow guiding area of ​​each of the baffles. The flow guiding assembly includes a valve plate and a reset torsion spring. The valve plate is rotatably connected to the baffle through the reset torsion spring. A mixing assembly, comprising an upper mixer and a lower mixer with independent split-shaft drives; The drive assembly includes an upper motor and a lower motor, which independently drive the upper agitator and the lower agitator, respectively.

2. The anti-precipitation reaction vessel for organic chemical industry according to claim 1, characterized in that: The valve plate has an airfoil-shaped surface on the side near the flow guide area. The relationship between the radius of curvature R and the design viscosity μ of the material is: R = k·μ 0.5 , where 0.1≤k≤0.

3.

3. The anti-precipitation reaction vessel for organic chemical industry according to claim 1, characterized in that: The valve plate's flip angle θ ranges from 0° to 75°.

4. The anti-precipitation reaction vessel for organic chemical industry according to claim 1, characterized in that: The upper agitator is a turbine-type agitator, and the lower agitator is an anchor-type agitator.

5. The anti-precipitation reaction vessel for organic chemical industry according to claim 1, characterized in that: Each of the described guide holes is an elongated oblique hole with a length-to-width ratio ≥ 3:

1.

6. The anti-precipitation reaction vessel for organic chemical industry according to claim 5, characterized in that: The axis of each of the guide holes forms an angle of 15°-45° with each of the baffles, and the inclination directions of adjacent guide holes alternately are opposite.

7. The anti-precipitation reaction vessel for organic chemical industry according to claim 1, characterized in that: The speed ratio between the upper and lower agitators is 2:1 to 5:

1. The lower motor is equipped with an overload protection module that automatically reduces speed when the torque exceeds 150% of the rated value.

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