A temperature measurement structure for a reaction vessel

Abstract

The temperature measurement structure for a reaction vessel provided by this invention includes a thermocouple extending from top to bottom and a temperature measuring sleeve coaxially sleeved on the thermocouple. The temperature measuring sleeve comprises a main body in the shape of a regular triangular prism and a sealing plate connected to the upper end face of the main body. The lower end of the main body gradually tapers inward and presses against the outer wall of the thermocouple. Sealant is applied to the contact surfaces of the main body and the thermocouple, making one side wall of the main body parallel to the virtual plane formed by the axis of the temperature measuring sleeve and the axis of the stirring shaft. This structure provides the temperature measuring sleeve with high strength to withstand the impact of material flow, protecting the internal thermocouple from damage and extending the service life of both the thermocouple and the temperature measuring sleeve. It also forms a sealed, insulated cavity between the temperature measuring sleeve and the thermocouple, preventing temperature transfer from the material above the measuring point and improving the accuracy of temperature detection. Furthermore, the opposing tips of the main body's side wall parallel to the virtual plane can be used to divert the material flow, improving the stirring effect and reducing the impact of the material flow on the main body.

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 temperature measurement structure for a reaction vessel. Background Technology

[0004] A reaction vessel is a container for physical or chemical reactions of materials. It contains an agitator for stirring the materials and a temperature measuring structure for monitoring the reaction temperature. The temperature measuring structure is usually a thermocouple. Since the temperature measuring point is mostly located near the bottom wall of the reaction vessel, the thermocouple is usually inserted from the side or bottom wall of the reaction vessel to shorten the exposed length of the thermocouple. When the agitator includes an anchor agitator, the rotation of the anchor agitator will block the insertion path of the thermocouple from the side or bottom wall of the reaction vessel, so that the thermocouple can only be inserted from the top wall of the reaction vessel. When it reaches the temperature measuring point, the thermocouple is exposed to the material for a long time, which is easy to bend due to the scouring of the material flow. In severe cases, it can also cause damage. The material above the temperature measuring point will also conduct heat to the thermocouple, resulting in inaccurate temperature measurement. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a reaction vessel temperature measurement structure that is not easily damaged and provides accurate temperature measurement.

[0006] To achieve the above objectives, the technical solution provided by the present invention is a temperature measuring structure for a reaction vessel, comprising a thermocouple and a temperature measuring sleeve, wherein the thermocouple extends from top to bottom and the temperature measuring sleeve is coaxially sleeved on the thermocouple;

[0007] The temperature measuring sleeve includes a main body in the shape of a regular triangular prism and a sealing plate connected to the upper end face of the main body. The lower end of the main body gradually tapers inward and abuts against the outer wall of the thermocouple. The abutting surfaces of the main body and the thermocouple are coated with sealant, 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. 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 stirring shaft. The pointed end of the opposite side of this side wall is used to divert the material flow.

[0008] Preferably, the width of the sidewall of the main body in the horizontal direction is 8 to 12 times the diameter of the thermocouple.

[0009] Preferably, the top of the thermocouple extends through the sealing plate and upwards.

[0010] Preferably, the bottom of the thermocouple is a temperature measuring head, which is located below the temperature measuring sleeve.

[0011] More preferably, the temperature measuring head has a length of 5 centimeters in the vertical direction.

[0012] More preferably, the reactor includes a turbine agitator and an anchor agitator connected to the stirring shaft, the anchor agitator including an arc-shaped paddle located below the turbine agitator and a vertical paddle located outside the turbine agitator.

[0013] More preferably, the temperature sensor is lower than the turbine agitator and higher than the arc-shaped impeller.

[0014] More preferably, the distance between the temperature measuring head and the arc-shaped paddle in the vertical direction is 3 to 5 centimeters.

[0015] More preferably, the temperature measuring sleeve is inserted between the turbine agitator and the vertical impeller.

[0016] More 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 vertical impeller.

[0017] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0018] By comprising a triangular prism-shaped main body and a sealing plate connected to the upper end of the main body, and by gradually narrowing the lower end of the main body inward to press against the outer wall of the thermocouple, and applying sealant to the mating surfaces of the main body and the thermocouple, and by making one side wall of the main body parallel to the virtual plane formed by the axis of the temperature measuring sleeve and the axis of the stirring shaft, the temperature measuring sleeve can be made to have high strength to resist the impact of the material flow, protect the internal thermocouple, avoid thermocouple damage, and extend the service life of the thermocouple and the temperature measuring sleeve. It also forms a sealed, insulated cavity between the temperature measuring sleeve and the thermocouple, preventing temperature transfer from the material above the measuring point and improving the accuracy of temperature detection. Furthermore, the opposing side tips of the main body parallel to the virtual plane side wall can be used to divert the material flow, improving the stirring effect and reducing the impact of the material flow on the main body. Attached Figure Description

[0019] Figure 1 This is a top view schematic diagram of a preferred embodiment of the present invention.

[0020] Figure 2 This is an axial cross-sectional view of a preferred embodiment of the present invention.

[0021] Figure 3 This is a radial cross-sectional view of a preferred embodiment of the present invention, with some components omitted.

[0022] 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

[0023] 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.

[0024] The up and down direction described in this invention refers to Figure 2 The up and down directions in the middle.

[0025] 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.

[0026] The advantage of this setting is that:

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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 temperature measuring structure for a reaction vessel, comprising a thermocouple and a temperature measuring sleeve, wherein the thermocouple extends from top to bottom and the temperature measuring sleeve is coaxially sleeved on the thermocouple; Its features are: The bottom of the thermocouple is a temperature measuring head, which is located below the temperature measuring sleeve. The reactor also includes a turbine stirrer and an anchor stirrer connected to the stirring shaft. The anchor stirrer includes an arc-shaped paddle located below the turbine stirrer and a vertical paddle located outside the turbine stirrer. The temperature measuring head is lower than the turbine stirrer and higher than the arc-shaped paddle. The temperature measuring sleeve is inserted between the turbine agitator and the vertical impeller. The shortest distance from the axis of the temperature measuring sleeve to the turbine agitator is equal to the distance from the axis of the temperature measuring sleeve to the vertical impeller. The temperature measuring sleeve includes a main body in the shape of a regular triangular prism and a sealing plate connected to the upper end face of the main body. The lower end of the main body gradually tapers inward and abuts against the outer wall of the thermocouple. The abutting surfaces of the main body and the thermocouple are coated with sealant, 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. 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 pointed end of the opposite side of this side wall is used to divert the material flow.

2. The reactor temperature measurement structure according to claim 1, characterized in that: The width of the sidewall of the main body in the horizontal direction is 8 to 12 times the diameter of the thermocouple.

3. The reactor temperature measurement structure according to claim 1, characterized in that: The top of the thermocouple passes through the sealing plate and extends upward.

4. The reactor temperature measurement structure according to claim 1, characterized in that: The temperature measuring head is 5 centimeters long in the vertical direction.

5. The reactor temperature measurement structure according to claim 1, characterized in that: The vertical distance between the temperature measuring head and the arc-shaped paddle is 3 to 5 centimeters.

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