A stirring structure of a reaction kettle

Abstract

The reaction kettle stirring structure comprises a stirring shaft and a stirrer, the stirrer comprises a turbine stirrer connected to the middle part of the stirring shaft and an anchor stirrer connected to the lower end of the stirring shaft, the stirrer further comprises a temperature measuring sleeve and a nitrogen sleeve extending in the up-down direction, the temperature measuring sleeve is inserted between the turbine stirrer and the vertical paddle, the temperature measuring sleeve comprises a main body in the shape of a regular triangular prism, one side wall of the main body is parallel to the virtual plane formed by the axis line of the temperature measuring sleeve and the axis line of the stirring shaft, the nitrogen sleeve has a body in the shape of a regular triangular prism, the projection of the body in the up-down direction is equal to the projection area of the main body in the up-down direction, the body and the main body are distributed in a ring array along the axis line of the stirring shaft, the material flow can be divided by the side wall of the main body and the tip of the side wall or the side wall opposite to the tip, the material flow is guided to the turbine stirrer and the anchor stirrer, the function of fixing the paddle is realized, and the stirring effect is improved.

Description

[0001] Divisional application statement

[0002] This application is a divisional application of Chinese invention patent application filed on June 27, 2022, entitled "A Reactor" and with application number 202210734758.2. Technical Field

[0003] This invention relates to the field of reaction vessel technology, and more specifically to a reaction vessel stirring structure. Background Technology

[0004] A reaction vessel is a container for physical or chemical reactions of materials. It is equipped with a stirrer for stirring materials. Existing stirrers include turbine stirrers, anchor stirrers, etc. In order to improve stirring efficiency, turbine stirrers and anchor stirrers are usually set on the same stirring shaft. The turbine stirrer is used to stir the central material near the stirring shaft, and the anchor stirrer is used to stir the edge material near the inner wall of the reaction vessel. However, the material located between the turbine stirrer and the anchor stirrer can only form a ring-shaped material flow around the stirring shaft, which is difficult to mix fully with the central and edge materials, resulting in poor stirring effect. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a reaction vessel stirring structure with good stirring effect.

[0006] To achieve the above objectives, the present invention provides a stirring structure for a reaction vessel, comprising:

[0007] A stirring shaft is rotatably inserted into the central hole of the upper end cap and extends in the vertical direction. The top of the stirring shaft protrudes upward from the upper end cap and is connected to a motor mounted on the upper end cap. The bottom of the stirring shaft is inserted into the central bottom bearing of the lower end cap and is connected to the central bottom bearing.

[0008] The agitator includes a turbine agitator connected to the middle of the agitator shaft and an anchor agitator connected to the lower end of the agitator shaft. The anchor agitator is composed of two blades arranged in a ring array around the axis of the agitator shaft. The blades include an upwardly extending vertical blade and an arc-shaped blade connected between the agitator shaft and the vertical blade.

[0009] The agitator further includes a temperature measuring sleeve and a nitrogen sleeve extending in the vertical direction. The temperature measuring sleeve is inserted between the turbine agitator and the vertical impeller. The temperature measuring sleeve includes a main body in the shape of a regular triangular prism. One side wall of the main body is parallel to the virtual plane formed by the axis of the temperature measuring sleeve and the axis of the agitator shaft. The side wall or the tip of the opposite side wall is used to divert the material flow and guide the material flow to the turbine agitator and the anchor agitator. The nitrogen sleeve has a main body in the shape of a regular triangular prism. The projection area of ​​the main body in the vertical direction is equal to the projection area of ​​the main body in the vertical direction. The main body and the main body are distributed in a ring array along the axis of the agitator shaft.

[0010] Preferably, a sealing plate is connected to the upper end face of the main body, the sealing plate is located above the vertical paddle, and the lower end of the main body gradually tapers inward.

[0011] More preferably, the temperature measuring sleeve is coaxially sleeved on the thermocouple and is higher than the temperature measuring head at the bottom of the thermocouple. The top of the thermocouple passes through the sealing plate and extends upward. The bottom outer wall of the thermocouple abuts against the lower end of the main body, so that the inner wall of the main body, the lower surface of the sealing plate, and the outer wall of the thermocouple form a sealed temperature-insulating cavity.

[0012] More preferably, the temperature measuring head is higher than the arc-shaped paddle and lower than the turbine agitator.

[0013] Preferably, the shortest distance between the centerline of the temperature measuring sleeve and the turbine agitator is equal to the distance between the centerline of the temperature measuring sleeve and the centerline of the vertical impeller.

[0014] Preferably, there are two sets of turbine agitators arranged at intervals along the vertical direction. Each set of turbine agitators has four inclined stirring blades, which are arranged in a ring array along the axis of the stirring shaft.

[0015] More preferably, the uppermost turbine agitator is lower than the upper surface of the vertical impeller.

[0016] Preferably, the vertical blade is located outside the turbine agitator, the arc-shaped blade is located below the turbine agitator, and the vertical blade and the arc-shaped blade located on the same blade are formed by bending the same pipe.

[0017] More preferably, the vertical impeller is in the shape of a regular triangular prism, one side wall of the vertical impeller is parallel to the virtual plane formed by the axis of the vertical impeller and the axis of the stirring shaft, and the projected area of ​​the vertical impeller in the vertical direction is equal to the projected area of ​​the main body in the vertical direction.

[0018] Preferably, the lower end cap is provided with a discharge port, and a conical guide plate is provided between the central bottom bearing and the inner wall of the lower end cap. The upper edge of the conical guide plate is flush with the upper end face of the central bottom bearing, and the lower edge of the conical guide plate is flush with the lowest point of the discharge port.

[0019] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0020] By including a temperature sensing sleeve and a nitrogen sleeve extending in the vertical direction in the agitator, the temperature sensing sleeve is inserted between the turbine agitator and the vertical impeller. The temperature sensing sleeve includes a main body in the shape of a regular triangular prism, with one side wall of the main body parallel to the virtual plane formed by the axis of the temperature sensing sleeve and the axis of the agitator shaft. The nitrogen sleeve also has a main body in the shape of a regular triangular prism, with the projection area of ​​the main body in the vertical direction being equal to the projection area of ​​the main body in the vertical direction. The main body and the main body are arranged in a ring array along the axis of the agitator shaft. The material flow can be diverted by the main body and one side wall of the main body or the tip of the opposite side wall, guiding the material flow to the turbine agitator and the anchor agitator, thus fixing the impeller and improving the mixing effect. Attached Figure Description

[0021] Figure 1 This is a top view schematic diagram of a preferred embodiment of the present invention.

[0022] Figure 2 This is an axial cross-sectional view of a preferred embodiment of the present invention.

[0023] Figure 3 This is a radial cross-sectional view of a preferred embodiment of the present invention, with some components omitted.

[0024] The components are as follows: 10. Vessel body; 11. Vessel frame; 12. Upper head; 121. Central hole; 122. Feed inlet; 123. Temperature measuring port; 124. Nitrogen port; 13. Lower head; 131. Central bottom bearing; 132. Discharge port; 133. Bottom cover; 134. Conical guide plate; 14. Temperature regulating jacket; 141. Spiral guide plate; 142. Clearance groove; 20. Stirring shaft; 31. Worm gear stirrer. 311. Stirring blade; 32. Anchor stirrer; 321. Paddle blade; 322. Vertical paddle; 323. Arc-shaped paddle; 40. Thermocouple; 41. Temperature sensor; 50. Temperature sensor sleeve; 51. Main body; 511. Side wall; 52. Sealing plate; 53. Insulation cavity; 60. Fixing device; 61. Arc-shaped seat; 62. First fixing plate; 63. Second fixing plate; 70. Nitrogen sleeve; 71. Body. Detailed Implementation

[0025] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more readily understood by those skilled in the art.

[0026] The up and down direction described in this invention refers to Figure 2 The up and down directions in the middle.

[0027] like Figures 1 to 3As shown, the reaction vessel provided by the present invention includes: a vessel body 10, a stirring shaft 20, a stirrer, a thermocouple 40, and a temperature measuring sleeve 50. The vessel body 10 includes a vessel frame 11, an upper end cap 12, and a lower end cap 13. The vessel frame 11 is cylindrical. The upper end cap 12 and the lower end cap 13 are welded to the upper and lower ends of the vessel frame 11, respectively, thus forming a cavity for containing materials within the vessel body 10. In this embodiment, the height of the vessel frame 11 in the vertical direction is approximately 2.3 meters, and the volume of the vessel body 10 is approximately 9 cubic meters. Both the upper end cap 12 and the lower end cap 13 are elliptical end caps. An elliptical end cap means that the axial cross-sectional profile of the upper end cap 12 and the lower end cap 13 is part of an ellipse. The upper end cap 12 is provided with a central hole 121. The device includes an inlet 122, a temperature measuring port 123, a lower end cap 13 with a central bottom bearing 131 and an outlet 132; a stirring shaft 20 is rotatably inserted into the central hole 121 and extends vertically, with the top of the stirring shaft 20 protruding upward from the upper end cap 12 and connected to a motor mounted on the upper end cap 12, and the bottom of the stirring shaft 20 inserted into and connected to the central bottom bearing 131; the agitator includes a turbine agitator 31 connected to the middle of the stirring shaft 20 and an anchor agitator 32 connected to the lower end of the stirring shaft 20, with multiple sets of turbine agitators 31 spaced apart vertically, each set of turbine agitators 31 having four inclined stirring blades 311. The blades 311 are arranged in a ring array along the axis of the stirring shaft 20. The anchor-type stirrer 32 consists of two J-shaped blades 321 arranged in a ring array around the axis of the stirring shaft 20. The blades 321 include an upwardly extending vertical blade 322 and an arc-shaped blade 323 connecting the stirring shaft 20 and the vertical blade 322. Thermocouple 40 is inserted into the temperature measuring port 123 and extends downward. The temperature measuring head 41 at the bottom of the thermocouple 40 is higher than the arc-shaped blade 323 and lower than the lowest turbine-type stirrer 31. Specifically, the vertical distance between the temperature measuring head 41 and the arc-shaped blade 323 is 3 to 5 centimeters. Temperature measuring sleeve 50 is coaxially sleeved on the thermocouple 40 and located above the temperature measuring head 41. The temperature measuring sleeve 50 is inserted into the... Between the turbine stirrer 31 and the vertical impeller 322, the temperature measuring sleeve 50 includes a main body 51 in the shape of a regular triangular prism and a sealing plate 52 connected to the upper end face of the main body 51. The upper end of the main body 51 is connected to the inner wall of the vessel body 10 through a fixing device 60 located above the vertical impeller 322. The lower end of the main body 51 gradually shrinks downward and abuts against the outer wall of the thermocouple 40, so that the inner wall of the main body 51, the lower surface of the sealing plate 52, and the outer wall of the thermocouple 50 form a sealed temperature insulation cavity 53. To improve the sealing effect of the temperature insulation cavity 53, sealant can be applied to the abutting surfaces of the main body 51 and the thermocouple 50. One side wall 511 of the main body 51 is parallel to the virtual plane formed by the axis of the temperature measuring sleeve 50 and the axis of the stirring shaft 20.

[0028] The advantage of this setting is that:

[0029] 1. It can give the temperature measuring sleeve high strength and resist the impact of material flow, avoid thermocouple damage, and extend the service life of thermocouple and temperature measuring sleeve. It can also form a sealed temperature insulation cavity between the temperature measuring sleeve and the thermocouple to prevent temperature transfer from the material above the temperature measuring point and improve the accuracy of temperature detection.

[0030] 2. It can also use the side wall 511 of the main body or the pointed tip of the opposite side of the side wall 511 to divert the material flow and guide the material flow to the turbine mixer and the anchor mixer, which can play the role of fixing the paddle and improving the mixing effect. It can also use the flat surface of the side wall 511 to achieve a stable connection with the fixing device and enhance the firmness.

[0031] The width of the sidewall 511 of the main body 51 in the horizontal direction is very important. If the width is too wide, it will occupy too much space in the vessel body 10, which will affect the actual capacity of the material and require a reduction in the size of the turbine agitator 31 and the anchor agitator 32, thus affecting the agitation efficiency. If the width is too narrow, the insulation cavity 53 will be too small, resulting in poor insulation effect, and the main body 51 will have a poor effect on diverting and guiding the material flow. Preferably, the width is 8 to 12 times the diameter of the thermocouple 40. In this embodiment, the width is 185 mm and the diameter of the thermocouple 40 is 18 mm.

[0032] To facilitate the connection between the fixing device 60 and the main body 51 and the vessel body 10, in this embodiment, the fixing device 60 includes an arc-shaped seat 61 connected to the inner wall of the vessel body 11 and a fixing plate connected to the arc-shaped seat 61. The plane of the fixing plate is parallel to the side wall 511 of the main body 51. Specifically, the fixing plate includes a first fixing plate 62 welded to the arc-shaped seat 61 and a second fixing plate 63 connected to the side wall 511. The first fixing plate 62 and the second fixing plate 63 are connected by bolts. The advantage of this arrangement is that it facilitates connection and allows adjustment of the specific position of the main body 51 in the horizontal direction by opening waist-shaped holes in the first fixing plate 62 or the second fixing plate 63, so that the shortest distance between the axis of the temperature measuring sleeve 50 and the turbine stirrer 31 is equal to the distance between the axis of the temperature measuring sleeve 50 and the axis of the vertical blade 321.

[0033] To ensure the strength of the anchor mixer 32 and improve the mixing effect, in this embodiment, the vertical blade 322 and the arc blade 323 located on the same blade 321 are formed by bending the same pipe. The vertical blade 322 is in the shape of a regular triangular prism. One side wall of the vertical blade 322 is parallel to the virtual plane formed by the axis of the vertical blade 322 and the axis of the mixing shaft 20. Furthermore, the projected area of ​​the vertical blade 322 in the vertical direction is equal to the projected area of ​​the main body 51 in the vertical direction.

[0034] To accommodate the mixing of different types of materials, in this embodiment, the upper end cap 12 is provided with a nitrogen port 124. The nitrogen port 124 and the temperature measuring port 123 are symmetrically distributed on both sides of the central hole 121. A nitrogen pipe 125 extending downwards is inserted into the nitrogen port 124. A nitrogen sleeve 70 is coaxially sleeved on the nitrogen pipe 125. The nitrogen sleeve 70 has a body 71 in the shape of a regular triangular prism. The projected area of ​​the body 71 in the vertical direction is equal to the projected area of ​​the main body 51 in the vertical direction. The body 71 and the main body 51 are arranged in a ring array along the axis of the mixing shaft 20. The material flow is diverted by the side wall of the body 71 parallel to the axis of the nitrogen sleeve 70 and the axis of the mixing shaft 20, or the tip of the opposite side of the side wall. The material flow is directed to the turbine mixer and the anchor mixer, which serves to fix the paddle.

[0035] To facilitate the adjustment of the stirring temperature, in this embodiment, the lower end of the vessel body 10 is wrapped with a temperature regulating jacket 14. The temperature regulating jacket 14 is provided with a spiral guide plate 141. The temperature regulating jacket 14 is also provided with a bottom cover for avoiding the center bottom bearing 131 and an avoidance groove for the discharge port 132.

[0036] To facilitate material outflow and prevent residue, in this embodiment, a conical guide plate 134 is provided between the inner wall of the central bottom bearing 131 and the lower end cap 13. The upper edge of the conical guide plate 134 is flush with the upper end face of the central bottom bearing 131, and the lower edge of the conical guide plate 134 is flush with the lowest point of the discharge port 132. This seals off the dead zone space around the central bottom bearing 131 that is lower than the lowest point of the discharge port 132, making the lowest point of the discharge port 132 the lowest point of the vessel body 10, ensuring that all materials in the vessel body 10 can flow out normally.

[0037] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A stirring structure for a reaction vessel, comprising: A stirring shaft is rotatably inserted into the central hole of the upper end cap and extends in the vertical direction. The top of the stirring shaft protrudes upward from the upper end cap and is connected to a motor mounted on the upper end cap. The bottom of the stirring shaft is inserted into the central bottom bearing of the lower end cap and is connected to the central bottom bearing. The agitator includes a turbine agitator connected to the middle of the agitator shaft and an anchor agitator connected to the lower end of the agitator shaft. The anchor agitator is composed of two blades arranged in a ring array around the axis of the agitator shaft. The blades include an upwardly extending vertical blade and an arc-shaped blade connected between the agitator shaft and the vertical blade. Its features are: The agitator further includes a temperature sensing sleeve and a nitrogen sleeve extending in the vertical direction. The temperature sensing sleeve is inserted between the turbine agitator and the vertical impeller. The temperature sensing sleeve includes a main body in the shape of a regular triangular prism. One side wall of the main body is parallel to the virtual plane formed by the axis of the temperature sensing sleeve and the axis of the agitator shaft. This side wall, or the pointed end of the opposite side wall, is used to divert the material flow, guiding the material flow to the turbine agitator and the anchor agitator. The nitrogen sleeve has a main body in the shape of a regular triangular prism. The projection of the main body in the vertical direction is parallel to the main body. The projected areas in the vertical direction are equal, and the main body and the main body are arranged in a ring array along the axis of the stirring shaft; the upper end face of the main body is connected to a sealing plate, which is located above the vertical paddle, and the lower end of the main body gradually shrinks inward; the temperature measuring sleeve is coaxially sleeved on the thermocouple and is higher than the temperature measuring head at the bottom of the thermocouple, the top of the thermocouple passes through the sealing plate and extends upward, and the bottom outer wall of the thermocouple abuts against the lower end of the main body, so that the inner wall of the main body, the lower surface of the sealing plate, and the outer wall of the thermocouple form a sealed temperature-insulating cavity.

2. The reactor stirring structure according to claim 1, characterized in that: The temperature sensor is higher than the arc-shaped paddle and lower than the turbine agitator.

3. The reactor stirring structure according to claim 1, characterized in that: The shortest distance between the centerline of the temperature measuring sleeve and the turbine agitator is equal to the distance between the centerline of the temperature measuring sleeve and the centerline of the vertical blade.

4. The stirring structure of the reaction vessel according to claim 1, characterized in that: The turbine agitator has two sets and is spaced apart in the vertical direction. Each set of the turbine agitator has four inclined agitator blades, which are arranged in a ring array along the axis of the agitator shaft.

5. The reactor stirring structure according to claim 4, characterized in that: The uppermost turbine agitator is below the upper surface of the vertical impeller.

6. The stirring structure of the reaction vessel according to claim 1, characterized in that: The vertical blade is located outside the turbine agitator, and the arc-shaped blade is located below the turbine agitator. The vertical blade and the arc-shaped blade, which are located on the same blade, are formed by bending the same pipe.

7. The reactor stirring structure according to claim 6, characterized in that: The vertical paddle is in the shape of a regular triangular prism. One side wall of the vertical paddle is parallel to the virtual plane formed by the axis of the vertical paddle and the axis of the stirring shaft. The projected area of ​​the vertical paddle in the vertical direction is equal to the projected area of ​​the main body in the vertical direction.

8. The stirring structure of the reactor according to claim 1, characterized in that: The lower end cap is provided with a discharge port, and a conical guide plate is provided between the central bottom bearing and the inner wall of the lower end cap. The upper edge of the conical guide plate is flush with the upper end face of the central bottom bearing, and the lower edge of the conical guide plate is flush with the lowest point of the discharge port.

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