An internally heated stirred tank

Abstract

The utility model discloses a kind of inner heating stirred tank, including kettle body, kettle cover, stirring rod, heating pipe, the lower end of kettle body is equipped with discharge gate, kettle cover is fixedly installed in the upper end opening of kettle body, stirring rod is rotatably installed in kettle cover, stirring rod includes shaft and crank rod, shaft is connected to kettle cover, crank rod is fixedly installed in the lower end of shaft, heating pipe includes first heating part and second heating part, first heating part and second heating part are spiral pipe structure, first heating part and second heating part are located in kettle body, part of second heating part is located in the range of crank rod, the utility model directly places double spiral heating pipe in kettle body interior, heating pipe and material are directly contacted heat exchange, overall thermal efficiency is higher than existing conventional outer heating reaction kettle, and then play the effect of energy saving, solve the problem of very low thermal efficiency, high energy waste.

Description

Technical Field

[0001] This utility model relates to the field of mixing reaction vessel technology, and more specifically, to an internally heated stirring vessel. Background Technology

[0002] Stirred reactors are core process equipment in industries such as petrochemicals, pharmaceuticals, and fine chemicals. The performance of their heating systems directly determines production efficiency, energy consumption, and economic benefits. Currently, most reactors in industrial production use jacketed or external coil heating methods, which achieve heating by introducing heat media such as steam or heat transfer oil outside the reactor body.

[0003] This external heating method has fundamental drawbacks such as extremely low thermal efficiency and serious energy waste. The heat must pass through a long transfer path from the heat medium to the jacket, the coil wall, the inner wall of the vessel, and finally to the material inside the vessel. There is unavoidable heat loss at each stage. The stainless steel, carbon steel and other metal materials used for the vessel wall have limited thermal conductivity. Moreover, as the equipment is used, air, scale and rust will accumulate between the inner wall of the jacket and the outer wall of the vessel, further increasing the thermal resistance. Therefore, a technical solution is needed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art, improve the heating efficiency inside the stirring vessel, reduce heat loss, and provide an internally heated stirring vessel.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model discloses an internally heated stirring vessel, including a vessel body, a vessel lid, a stirring rod, and a heating tube. The lower end of the vessel body is provided with a discharge port. The vessel lid is fixedly installed at the upper opening of the vessel body. The stirring rod is rotatably installed on the vessel lid. The stirring rod includes a shaft and a crank. The shaft is connected to the vessel lid, and the crank is fixedly installed at the lower end of the shaft. The heating tube includes a first heating part and a second heating part. The first heating part and the second heating part are spiral tube structures. The first heating part and the second heating part are located inside the vessel body, and a portion of the second heating part is located within the range of the crank.

[0007] Furthermore, the crank is a U-shaped rod, the lower end of the shaft is connected to the recessed center of the crank, both ends of the crank are bent upwards, and part of the second heating section is located between the crank and the shaft.

[0008] Furthermore, the first heating part is located above the second heating part, and the first heating part and the second heating part are integrally bent from the same tube. The spiral diameter of the first heating part is larger than the spiral diameter of the second heating part.

[0009] Furthermore, the heating tube includes a first extension tube and a second extension tube. The first extension tube is connected to the first heating part, and the second extension tube is connected to the second heating part. The pot lid is provided with two channel openings, through which the first extension tube and the second extension tube respectively pass and connect to an external heat source.

[0010] Furthermore, the spacing between two adjacent spiral layers of the first heating section and the second heating section is greater than or equal to the diameter of the heating tube.

[0011] Furthermore, the first heating part is equipped with multiple support plates, which extend axially and are arranged in a ring and fixedly installed on the outside of the first heating part. The support plates are fixedly connected to each layer of the spiral of the first heating part.

[0012] Furthermore, the side wall of the vessel is provided with a temperature measuring port, and a thermometer is installed in the temperature measuring port. The inner end of the thermometer extends between the first heating part and the second heating part.

[0013] Furthermore, the side wall of the vessel body is provided with a sandwich layer, and the first heating part and the second heating part are located within the area where the sandwich layer is provided in the vessel body.

[0014] Furthermore, the shaft is fixedly mounted with a first flipping plate and a second flipping plate. Two first flipping plates are symmetrically arranged and are inclined. The first flipping plates are located within the range of the second heating part. Two second flipping plates are symmetrically arranged and are inclined. The second flipping plates are located between the first heating part and the second heating part.

[0015] Furthermore, the first and second flipping plates are arranged at an axial distance along the shaft, with the second flipping plate located above the first flipping plate, and the first and second flipping plates being vertically offset.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model places the double-helix heating tube directly inside the reactor body, allowing the heating tube to directly contact the material for heat exchange. The overall thermal efficiency is higher than that of the existing traditional external heating reactor, thus achieving energy saving and solving the problems of extremely low thermal efficiency and high energy waste. The layered layout of the large-diameter first heating section and the small-diameter second heating section, combined with the forced convection formed by stirring, further enhances the heat exchange effect and significantly reduces the energy cost of enterprises.

[0018] 2. This utility model adopts a combination of a U-shaped curved rod and a staggered tilting plate, along with a second heating part that extends into the center of the stirring, effectively eliminating the low temperature zone in the center of the reactor. The temperature at the stirring point inside the reactor is more uniform. The integrated heating tube is connected to an external heat source through a top extension tube, and the support plate enhances the structural stability. It is easy to install and maintain. The temperature measuring point is precisely set between the two heating parts, and the temperature detection is accurate and reliable, which facilitates precise control of the reaction process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of one embodiment.

[0020] Figure 2 This is a cross-sectional view of this embodiment.

[0021] Reference numerals in the attached drawings: 1. Vessel body; 11. Discharge port; 12. Temperature measuring port; 2. Vessel lid; 21. Feed inlet; 22. Channel opening; 23. Center opening; 3. Stirring rod; 31. Shaft; 32. Curved rod; 33. First flipping plate; 34. Second flipping plate; 4. Heating tube; 41. First heating section; 42. Second heating section; 43. First extension tube; 44. Second extension tube; 5. Thermometer; 6. Support plate. Detailed Implementation

[0022] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] like Figure 1 and Figure 2 As shown in the figure, the internal heating stirring vessel disclosed in this embodiment includes a vessel body 1, a vessel cover 2, a stirring rod 3, and a heating tube 4. The vessel body 1 is a vertical cylindrical structure, and the lower part of the vessel body 1 is a conical conical structure with an arc transition. A discharge port 11 is provided at the center of the conical bottom of the vessel body 1, and a discharge valve (not shown in the figure) is installed at the discharge port 11. The vessel cover 2 is fixedly installed at the upper opening of the vessel body 1 by flange bolts. The vessel cover 2 is provided with a feed port 21, two channel ports 22, and a central port 23. The feed port 21 is used to feed materials into the vessel, and the central port 23 is used to install the stirring rod 3.

[0024] The stirring rod 3 is rotatably mounted at the center opening 23 of the vessel cover 2 via a bearing assembly. The upper end of the stirring rod 3 extends out of the vessel cover 2 and is connected to an external drive motor (not shown in the figure). The stirring rod 3 includes a shaft 31 and a curved rod 32. The shaft 31 is vertically arranged, and the upper end of the shaft 31 passes through the center opening 23 and is connected to the drive motor. The lower end of the shaft 31 extends into the interior of the vessel body 1. The curved rod 32 is a U-shaped rod. The lower end of the shaft 31 is welded and fixed to the concave center of the curved rod 32. Both ends of the curved rod 32 are bent upwards to form an upward-opening U-shaped structure, which can fully stir the material in the lower part of the vessel body 1 and prevent material sedimentation.

[0025] The heating tube 4 is made of a seamless, one-piece bent metal tube, which can be made of steel or copper. It has a double-helix structure and specifically includes a first heating section 41, a second heating section 42, a first extension tube 43, and a second extension tube 44. Both the first heating section 41 and the second heating section 42 are spiral tube structures. The spiral tube structure of the first heating section 41 and the second heating section 42 maximizes the contact area between the heating tube 4 and the material, ensuring sufficient heat conduction. The first heating section 41 is located above the second heating section 42, and the spiral of the first heating section 41 is straight. The diameter is larger than the spiral diameter of the second heating part 42. The lower part of the second heating part 42 extends into the space between the crank 32 and the shaft 31, so that the heat can be directly transferred to the stirring center area, so that the material is fully heated at the stirring point and the reaction effect is better. The first extension pipe 43 is connected to the upper end of the first heating part 41, and the second extension pipe 44 is connected to the lower end of the second heating part 42. The first extension pipe 43 and the second extension pipe 44 pass upward through the two channel openings 22 on the kettle cover 2, respectively, and are connected to the external heat transfer oil heat source or steam heat source to form a closed heat medium circulation loop.

[0026] The spacing between two adjacent spiral layers of the first heating section 41 and the second heating section 42 is not less than the diameter of the heating tube 4. In this embodiment, it is preferably equal to the diameter of the heating tube 4. This ensures sufficient heat exchange area and avoids the problems of poor material flow and cleaning caused by too small a spacing. Four support plates 6 are welded and fixed to the outside of the first heating section 41. The four support plates 6 extend axially and are arranged in a ring-shaped uniform interval on the outside of the first heating section 41. Each support plate 6 is welded and fixed to each spiral layer of the first heating section 41, so that the spacing between each spiral layer remains stable. This can effectively enhance the overall structural strength of the heating tube 4 and prevent the heating tube 4 from vibrating and deforming due to fluid impact during stirring.

[0027] The side wall of the vessel body 1 is provided with a temperature measuring port 12, and a thermometer 5 is sealed and installed inside the temperature measuring port 12. The inner end of the thermometer 5 extends into the interior of the vessel body 1 and extends to the area between the first heating part 41 and the second heating part 42. It can accurately measure the average temperature of the material inside the vessel and provide a reliable basis for temperature control. The side wall of the vessel body 1 is provided with a heat-insulating jacket. The first heating part 41 and the second heating part 42 are both located within the axial coverage area of ​​the heat-insulating jacket. The jacket can be a vacuum heat-insulating jacket, or a circulating heat-conducting medium can be introduced to assist the heating and heat preservation inside the vessel body 1, which can reduce the heat loss of the side wall of the vessel body 1 and further improve the thermal efficiency.

[0028] A first tilting plate 33 and a second tilting plate 34 are also fixedly installed on the shaft 31. Two first tilting plates 33 are provided, symmetrically welded to the lower part of the shaft 31. The first tilting plates 33 are located within the spiral range of the second heating section 42 and are inclined, with an angle of 20° between the first tilting plate 33 and the horizontal plane. Two second tilting plates 34 are also provided, symmetrically welded to the middle part of the shaft 31. The second tilting plates 34 are located between the first heating section 41 and the second heating section 42 and are also inclined. The second flipping plate 34 has an angle of 20° with the horizontal plane. The first flipping plate 33 and the second flipping plate 34 are arranged at intervals along the axial direction of the shaft 31. The second flipping plate 34 is located above the first flipping plate 33, and the first flipping plate 33 and the second flipping plate 34 are staggered by 90° in the circumferential direction. This staggered and inclined flipping plate structure can generate axial and radial material flow simultaneously during the stirring process, so that the material in the kettle forms strong turbulence and tumbling, preventing material accumulation. It not only improves the uniformity of stirring, but also significantly enhances the heat exchange effect between the material and the surface of the heating tube 4.

[0029] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An internally heated stirring vessel, characterized in that, The apparatus includes a vessel body (1), a vessel lid (2), a stirring rod (3), and a heating tube (4). The lower end of the vessel body (1) is provided with a discharge port (11). The vessel lid (2) is fixedly installed at the upper opening of the vessel body (1). The stirring rod (3) is rotatably installed on the vessel lid (2). The stirring rod (3) includes a shaft (31) and a crank (32). The shaft (31) is connected to the vessel lid (2), and the crank (32) is fixedly installed at the lower end of the shaft (31). The heating tube (4) includes a first heating part (41) and a second heating part (42). The first heating part (41) and the second heating part (42) are spiral tube structures. The first heating part (41) and the second heating part (42) are located inside the vessel body (1), and part of the second heating part (42) is located within the range of the crank (32).

2. The internally heated stirring vessel according to claim 1, characterized in that, The crank (32) is a U-shaped rod. The lower end of the shaft (31) is connected to the recessed center of the crank (32). Both ends of the crank (32) are bent upwards. Part of the second heating part (42) is located between the crank (32) and the shaft (31).

3. The internally heated stirring vessel according to claim 1, characterized in that, The first heating part (41) is located above the second heating part (42). The first heating part (41) and the second heating part (42) are integrally bent from the same tube. The spiral diameter of the first heating part (41) is larger than the spiral diameter of the second heating part (42).

4. The internally heated stirring vessel according to claim 1, characterized in that, The heating tube (4) includes a first extension tube (43) and a second extension tube (44). The first extension tube (43) is connected to the first heating part (41), and the second extension tube (44) is connected to the second heating part (42). The lid (2) is provided with two channel openings (22). The first extension tube (43) and the second extension tube (44) pass through the two channel openings (22) respectively and are connected to an external heat source.

5. The internally heated stirring vessel according to claim 1, characterized in that, The distance between two adjacent spiral layers of the first heating part (41) and the second heating part (42) is greater than or equal to the diameter of the heating tube (4).

6. The internally heated stirring vessel according to claim 1, characterized in that, The first heating part (41) is equipped with a plurality of support plates (6), which extend along the axial direction. The plurality of support plates (6) are arranged in a ring and fixedly installed on the outside of the first heating part (41). The support plates (6) are fixedly connected to each layer of the spiral of the first heating part (41).

7. The internally heated stirring vessel according to claim 1, characterized in that, The side wall of the vessel body (1) is provided with a temperature measuring port (12), and a thermometer (5) is installed in the temperature measuring port (12). The inner end of the thermometer (5) extends between the first heating part (41) and the second heating part (42).

8. The internally heated stirring vessel according to claim 1, characterized in that, The side wall of the vessel body (1) is provided with a sandwich layer, and the first heating part (41) and the second heating part (42) are located within the range of the sandwich layer provided in the vessel body (1).

9. The internally heated stirring vessel according to claim 1, characterized in that, The shaft (31) is fixedly mounted with a first flip plate (33) and a second flip plate (34). Two first flip plates (33) are symmetrically arranged and are inclined. The first flip plates (33) are located within the range of the second heating part (42). Two second flip plates (34) are symmetrically arranged and are inclined. The second flip plates (34) are located between the first heating part (41) and the second heating part (42).

10. The internally heated stirring vessel according to claim 9, characterized in that, The first flip plate (33) and the second flip plate (34) are arranged at an axial distance along the shaft (31), with the second flip plate (34) located above the first flip plate (33), and the first flip plate (33) and the second flip plate (34) being vertically offset.

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