A heating stirred tank

Abstract

The utility model discloses a kind of heating stirring kettle, including kettle body, stirring device and heating device;Kettle body includes cylinder and the lower concave spherical crown body integrally connected to the lower end of cylinder;Heating device includes the spoiler heating pipe arranged along the inner side wall of cylinder, and first radial interval is kept between spoiler heating pipe and the inner side wall of cylinder;The lower end of spoiler heating pipe is higher than the lower end of cylinder, and spoiler heating pipe extends upwards and its upper end is lower than the upper end of cylinder;Stirring shaft is located at the center of cylinder, and the liquid in cylinder is disturbed by spoiler heating pipe, and it flows from first radial interval circumferentially when stirring paddle rotates outer edge keeps second radial interval with spoiler heating pipe;Thus, heating device jacket is not needed to be set in kettle body wall body, simplify the structure and installation of heating device, cleverly use spoiler heating pipe to assist to improve mixing function, and the design of stirring paddle is more simplified.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to a heating and stirring vessel, which is suitable for processes such as mixing, dissolving, reacting, and heat transfer of liquids with low viscosity, medium-low viscosity, and medium viscosity. Background Technology

[0002] Stirred tanks, as important process equipment, are widely used in mixing, reaction, and heat transfer processes in industries such as chemical, pharmaceutical, food, and coatings. Traditional stirred tanks with heating functions typically employ jacketed heating or internal coil heating.

[0003] Among them, the jacketed heating method, in which the heating device is jacketed inside the vessel wall, results in a complex vessel wall structure and low heat transfer efficiency. The built-in coil heating method, on the other hand, is generally set near the top or bottom of the vessel, so it does not depend on the vessel wall. However, it still suffers from less than ideal heat transfer efficiency and can also obstruct the flow of fluids on the surface or bottom.

[0004] Some systems integrate heating functionality into the impeller. For example, the impeller comprises a heating element and a spiral stirring element. The heating element is mounted on a rotating shaft and contains a heating wire filled with insulating material, which encapsulates the heating wire within the heating element. The spiral stirring element is mounted on the heating element, and a heating control device is mounted on the rotating shaft. This allows the impeller to be automatically heated based on the internal temperature of the reactor. This type of heating device does not form a clear structural connection with the reactor body, does not complicate the reactor wall structure, and does not obstruct flow on the fluid surface or bottom. However, it disrupts the conventional structure of the impeller, resulting in high modification costs. Furthermore, it is difficult to repair in case of malfunction.

[0005] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a heating and stirring vessel that does not require the heating device to be jacketed inside the vessel body, thus simplifying the structure and installation of the heating device, providing good heat transfer effect, cleverly utilizing a turbulent heating tube to assist in improving the mixing function, and further simplifying the design of the stirring blades.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A heated stirring vessel includes a vessel body, a stirring device, and a heating device. The stirring device includes a stirring shaft driven by a drive motor and stirring blades mounted on the stirring shaft. The heating device is used to heat the vessel body. The vessel body includes a cylindrical body and a concave spherical cap integrally connected to the lower end of the cylindrical body; the heating device includes a turbulent heating tube arranged along the inner wall of the cylindrical body, the turbulent heating tube and the inner wall of the cylindrical body maintaining a first radial distance; the lower end of the turbulent heating tube is higher than the lower end of the cylindrical body, the turbulent heating tube extends upward and its upper end is lower than the upper end of the cylindrical body; The stirring shaft is located at the center of the cylinder, and the outer edge of the stirring blade maintains a second radial distance from the turbulent heating tube. When the stirring blade rotates, the liquid near the inner wall of the cylinder is turbulent by the turbulent heating tube and flows circumferentially through the first radial distance.

[0008] As a preferred embodiment, the turbulence-type heating tube is a U-shaped heating tube, which includes a first vertical section, a second vertical section and a bottom section; the bottom section is connected and passes through the bottom ends of the first vertical section and the second vertical section; the first vertical section and the second vertical section are respectively arranged on two opposite sides of the inner wall of the cylinder, and both maintain a gap with the inner wall of the cylinder; The bottom section is arranged in a semi-circular arc along the inner wall of the cylinder, and maintains a gap with the inner wall of the cylinder; or, the bottom section passes laterally through the central area of ​​the bottom of the cylinder and avoids the stirring shaft.

[0009] As a preferred embodiment, the inner sidewall of the cylinder is welded with several horizontally spaced first clamps, each with a vertically penetrating first groove, through which the first vertical section and the second vertical section pass.

[0010] As a preferred embodiment, the stirring blades are arranged in several groups with vertical spacing along the stirring shaft, and the stirring blades are vertically offset from the first clamp.

[0011] As a preferred embodiment, the turbulence-type heating tube is a spiral heating tube that extends spirally around the stirring shaft; several vertically spaced second clamps are welded to the inner wall of the cylinder, and the second clamps are provided with circumferentially through second grooves, which are open towards the center of the vessel; the spiral heating tube passes through the corresponding second groove.

[0012] As a preferred embodiment, the spiral heating tube has a variable pitch design, with the pitch in the bottom region being smaller than that in the middle region, and the pitch in the middle region being smaller than that in the upper region.

[0013] As a preferred embodiment, the stirring blades and the stirring shaft adopt a modular and detachable connection structure, which can be any one of flange bolt connection, clamp-type clamp connection or tapered sleeve connection with keyway.

[0014] As a preferred embodiment, the vessel is equipped with multiple temperature sensors, which are located at least in the upper, middle, and lower parts of the vessel, respectively, and are positioned away from the stirring shaft and stirring blades.

[0015] As a preferred embodiment, the stirring blades are arranged in several groups with vertical spacing along the stirring shaft, with the lowest group of stirring blades located inside the concave spherical cap and below the lower end of the turbulent heating tube, while the remaining stirring blades are located inside the cylindrical body.

[0016] This utility model has significant advantages and beneficial effects compared with the prior art. Specifically, as can be seen from the above technical solution, it mainly targets the common vessel body formed by integrally connecting a cylindrical body and a concave spherical cap. A turbulence-type heating tube is arranged along the inner wall of the cylindrical body, maintaining a first radial distance between the turbulence-type heating tube and the inner wall of the cylindrical body. The lower end of the turbulence-type heating tube is higher than the lower end of the cylindrical body, and the turbulence-type heating tube extends upward with its upper end lower than the upper end of the cylindrical body. Since the stirring shaft is located at the center of the cylindrical body, the outer edge of the rotating stirring blade maintains a second radial distance from the turbulence-type heating tube. When stirring… When the impeller rotates, the liquid on the inner wall of the cylinder is turbulent by the turbulent heating tube and flows circumferentially through the first radial interval. In this way, the arrangement of the heating tube can also enhance the mixing of the liquid when the impeller rotates, cleverly combining the heating function with the mixing function. Moreover, it does not require the heating device to be jacketed inside the vessel wall, simplifying the structure and installation of commonly used jacketed heating devices. The heat transfer effect is good. Since the mixing function is enhanced by the turbulent heating tube, the design of the impeller can be further simplified, without relying on high-power and complex stirring devices.

[0017] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a partial perspective view of the heating and stirring vessel according to Embodiment 1 of this utility model. Figure 2 This is a cross-sectional view of the heating and stirring vessel according to Embodiment 1 of this utility model; Figure 3 This is a partial perspective view of the heating and stirring vessel according to Embodiment 2 of this utility model. Figure 4 This is a cross-sectional view of the heating and stirring vessel according to Embodiment 2 of this utility model; Figure 5 This is a partial perspective view of the heating and stirring vessel according to Embodiment 3 of this utility model. Figure 6 This is a partial view of the heating and stirring vessel according to Embodiment 4 of this utility model. Figure 7 This is a partial view of the heating and stirring vessel according to Embodiment 5 of this utility model. Detailed Implementation

[0019] Please refer to Figures 1 to 7 As shown, it illustrates the specific structure of various embodiments of the present invention.

[0020] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] like Figure 1 and Figure 2 As shown, a heated stirring vessel includes a vessel body 10, a stirring device, and a heating device. Both the stirring device and the heating device are disposed within the inner cavity 11 of the vessel body.

[0022] The vessel body 10 includes a cylindrical body and a concave spherical cap 102 integrally connected to the lower end of the cylindrical body 101, which is currently the most common vessel body 10 structure in the industry.

[0023] The stirring device includes a stirring shaft 20 driven by a drive motor and stirring blades 21 mounted on the stirring shaft 20. The drive motor drives the stirring shaft 20 to rotate at a fixed speed, or a frequency converter control system can be used to adjust the stirring speed. These are mature technologies in the industry, and the appropriate drive motor can be selected as needed. The stirring blades 21 are arranged in several groups with vertical spacing along the stirring shaft 20. The stirring blades 21 and the stirring shaft 20 adopt a modular and detachable connection structure, which facilitates the replacement of worn parts or the change of blade type to adapt to different processes. The specific detachable connection structure can be any one of the following: flange bolt connection (connected by flange and high-strength bolts), clamp-type clamp connection (using split clamps for clamping), or tapered sleeve connection with keyway (transmitting torque through tapered surface fit and key). Usually, an anti-loosening design structure is configured, such as spring washers, lock nuts, or anti-return pins, to ensure safe and reliable operation.

[0024] The vessel is equipped with multiple temperature sensors, which are located at least in the upper, middle and lower parts of the vessel, and are positioned away from the stirring shaft 20 and the stirring blades 21.

[0025] The heating device is used to heat the interior of the vessel body 10. The heating device includes a turbulent heating tube 30 arranged along the inner wall of the cylindrical body 101. The turbulent heating tube 30 can be designed with internally flowing hot water, or it can be a structure with a built-in electric heating wire and an external insulating layer. The turbulence-type heating tube 30 maintains a first radial distance D1 between itself and the inner wall of the cylindrical body 101; the arrangement of the turbulence-type heating tube 30 is configured to interfere with and guide the flow field generated by the rotation of the stirring blades 21; the lower end of the turbulence-type heating tube 30 is higher than the lower end of the cylindrical body 101 by a distance D3, the turbulence-type heating tube 30 extends upward and its upper end is lower than the upper end of the cylindrical body 101, typically, the upper liquid surface maintains a distance D2 between itself and the upper end of the turbulence-type heating tube 30, and the upper liquid surface is higher than the uppermost stirring blade 21; the lowermost set of stirring blades 21 is located in the inner cavity 112 of the concave spherical cap and is lower than the lower end of the turbulence-type heating tube 30, and the remaining stirring blades 21 are located in the inner cavity 111 of the cylindrical body.

[0026] The stirring shaft 20 is located at the center of the cylindrical body 101, and the outer edge of the stirring blade 21 maintains a second radial distance from the turbulent heating tube 30. When the stirring blade 21 rotates, the liquid near the inner wall of the cylindrical body 101 is turbulented by the turbulent heating tube 30 and flows circumferentially through the first radial distance D1. Thus, the built-in turbulent heating tube 30 increases the heat-receiving contact area, resulting in higher heat transfer efficiency. The heating tube not only serves as a heat source but also acts as a static mixer. The arrangement of the heating tube, together with the stirring blade 21, enhances the mixing of the liquid during rotation, cleverly combining heating and mixing functions for more uniform mixing and reduced dead zones in the surrounding flow. Because the turbulent heating tube 30 assists in improving the mixing function, the design of the stirring blade 21 can be simplified, eliminating the need for high-power, complex stirring devices. If the same stirring device is used, the stirring speed can be appropriately reduced to achieve the same mixing effect, thereby reducing energy consumption. This scheme is suitable for processes such as mixing, dissolving, reacting, and heat transfer of liquids with low, medium, and medium viscosity. It is especially suitable for situations where high mixing uniformity and temperature uniformity are required. At the same time, it makes the "wall-hanging" phenomenon on the inner wall of the vessel 10 less obvious, eliminating the need for a wall-scraping device and simplifying the internal structure of the vessel 10.

[0027] In Embodiment 1, the turbulence-type heating tube 30 is a U-shaped heating tube, comprising a first vertical section 31, a second vertical section 33, and a bottom section 32. The bottom section 32 connects and extends between the bottom ends of the first vertical section 31 and the second vertical section 33. Typically, the vertical section and the bottom section of the U-shaped heating tube are integrally bent, with a tube diameter of 20-50 mm, and are made of 304 stainless steel or 316L stainless steel. The first vertical section 31 and the second vertical section 33 are respectively arranged on opposite sides of the inner wall of the cylindrical body 101, and both maintain a gap with the inner wall of the cylindrical body 101 (i.e., the aforementioned first radial interval D1). The bottom section 32 is arranged in a semi-circular arc along the curvature of the inner wall of the cylindrical body 101, and maintains a gap with the inner wall of the cylindrical body 101. Typically, the first radial interval is smaller than the second radial interval, which is 0.3-0.5 times the second radial interval; the first radial interval is 10-50mm, that is, the first vertical segment 31 and the second vertical segment 33 both maintain a radial distance of 10-50mm from the inner wall of the cylindrical body 101. If the bottom segment 32 is arranged along the arc of the inner wall of the cylindrical body 101, it also maintains the same radial distance of 10-50mm from the inner wall of the cylindrical body 101.

[0028] like Figure 3 and Figure 4 As shown, the specific structure of Embodiment 2 is basically the same as that of Embodiment 1, with the main difference being: the turbulence-type heating tube 30 is fixed to the inner wall of the vessel body 10 by a special fixing clamp, which facilitates installation and positioning and effectively constrains the heating tube; the fixing clamp is made of the same material as the vessel body 10 and is fixed to the inner wall of the vessel body 10 by welding, with a clamp thickness of 3-8mm and a width of 20-50mm. Several horizontally spaced first clamps 40 are welded to the inner wall of the cylindrical body 101, each with a vertically through first groove through which the first vertical section and the second vertical section pass. Several sets of stirring blades 21 are arranged vertically spaced along the stirring shaft 20, and the stirring blades 21 and the first clamps 40 are staggered vertically. That is, the stirring blades 21 and the first clamps 40 are not directly opposite each other; the first clamps 40 correspond to the positions between two adjacent sets of stirring blades 21. In actual design, the first clamps can be set only for the first vertical section or the second vertical section. If both vertical segments are equipped with a first clamp for positioning, it is preferable to design the first clamps on both opposite sides to be staggered one by one, rather than being directly opposite and symmetrical.

[0029] like Figure 5 As shown, it illustrates the specific structure of Embodiment 3, which is basically the same as the structure of Embodiment 1. The main difference is that the bottom section passes laterally through the central area of ​​the bottom of the cylindrical body 101 and avoids the stirring shaft 20.

[0030] like Figure 6As shown, it displays the physical structure of Embodiment 4, which is equivalent to setting the turbulence-type heating tubes 3030 of Embodiments 2 and 3 together inside the vessel body 10. According to the specific heating requirements, two sets of turbulence-type heating tubes 30 are set.

[0031] like Figure 7 As shown, this illustrates the physical structure of Embodiment 5, which utilizes the turbulence-type heating tube 3030 from Embodiment 3. The stirring blades 21 were redesigned to meet mixing requirements. Instead of the staggered arrangement of the several groups of stirring blades 21 with varying vertical spacing as in Embodiments 1 to 4, two stirring blades 21 within the same group are designed as inclined blades with different inclinations, their radial projections forming a staggered cross shape. An auxiliary blade 22 is also installed on the lowest group of stirring blades 21. Since the two stirring blades 21 in the same group are installed using a clamping clamp, each stirring blade 21 has radially outward-extending mounting ears at both ends of its semi-circular mounting portion. These mounting ears have connecting through holes. During normal installation, bolts are passed through the two connecting through holes, and nuts are locked onto the bolt ends. This uses the bolt caps and nuts to fix the two mounting ears, thus tightly securing the semi-circular mounting portions of the two stirring blades 21 to the stirring shaft 20. Here, using bolts, the mounting holes at the inner end of the auxiliary blade 22 are fitted onto the bolts. In this way, the inner end of the auxiliary blade 22 is also clamped between the nut and a mounting lug, so that the two auxiliary blades 22 are set on opposite sides. The two auxiliary blades 22 and the two stirring blades 21 form four multi-blade groups distributed at 90 degrees. Usually, the radial length of the bottom stirring blade 21 and the added auxiliary blades 22 is relatively short. In order to match the gradually decreasing space of the concave spherical crown 102, the four multi-blade groups distributed at 90 degrees can better stir and mix the fluid in the space where the concave spherical crown 102 is located, and the fluid material is not easy to sink to the bottom.

[0032] In other embodiments, the turbulence-type heating tube 30 is a spiral heating tube that extends spirally around the stirring shaft 20. Several vertically spaced second clamps are welded to the inner wall of the cylindrical body 101. Each second clamp has a circumferentially through-hole, open towards the center of the vessel. The spiral heating tube passes through the corresponding second groove to accommodate different curvatures and provide uniform support. The spiral heating tube extends spirally from bottom to top along the inner wall of the cylindrical body 101, maintaining a distance of 15-60 mm from the inner wall. Preferably, the spiral heating tube has a variable pitch design, with the thread gradually increasing from bottom to top. The pitch in the bottom region is smaller than that in the middle region, and the pitch in the middle region is smaller than that in the upper region, to reduce obstruction to the flow field.

[0033] The key design feature of this invention is that it addresses the common vessel body 10 formed by the integral connection of a cylindrical body 101 and a concave spherical cap 102. A turbulent heating tube 30 is arranged along the inner wall of the cylindrical body 101, maintaining a first radial distance between the turbulent heating tube 30 and the inner wall of the cylindrical body 101. The lower end of the turbulent heating tube 30 is higher than the lower end of the cylindrical body 101, and the turbulent heating tube 30 extends upward with its upper end lower than the upper end of the cylindrical body 101. Since the stirring shaft 20 is located at the center of the cylindrical body 101, the outer edge of the rotating stirring blade 21 maintains a second radial distance from the turbulent heating tube 30. When the stirring blade... When the impeller 21 rotates, the liquid on the inner side wall of the cylindrical body 101 is turbulent by the turbulent heating tube 30 and flows circumferentially from the first radial interval. In this way, the arrangement of the heating tube can also enhance the mixing of the liquid when the impeller 21 rotates, cleverly combining the heating function and the mixing function. Moreover, it does not require the heating device to be jacketed in the wall of the vessel body 10, simplifying the structure and installation of the commonly used jacketed heating device. The heat transfer effect is good. Since the mixing function is enhanced by the turbulent heating tube 30, the design of the impeller 21 can be further simplified, without relying on a large power and complex stirring device.

[0034] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A heated stirring vessel, comprising a vessel body, a stirring device, and a heating device, wherein the stirring device includes a stirring shaft driven by a drive motor and stirring blades mounted on the stirring shaft, and the heating device is used to heat the vessel body, characterized in that: The vessel body includes a cylindrical body and a concave spherical cap integrally connected to the lower end of the cylindrical body; the heating device includes a turbulent heating tube arranged along the inner wall of the cylindrical body, the turbulent heating tube and the inner wall of the cylindrical body maintaining a first radial distance; the lower end of the turbulent heating tube is higher than the lower end of the cylindrical body, the turbulent heating tube extends upward and its upper end is lower than the upper end of the cylindrical body; The stirring shaft is located at the center of the cylinder, and the outer edge of the stirring blade maintains a second radial distance from the turbulent heating tube. When the stirring blade rotates, the liquid near the inner wall of the cylinder is turbulent by the turbulent heating tube and flows circumferentially through the first radial distance.

2. The heating and stirring vessel according to claim 1, characterized in that: The turbulence-type heating tube is a U-shaped heating tube, which includes a first vertical section, a second vertical section and a bottom section; the bottom section is connected and passes through the bottom ends of the first vertical section and the second vertical section; the first vertical section and the second vertical section are respectively arranged on two opposite sides of the inner wall of the cylinder, and both maintain a gap with the inner wall of the cylinder. The bottom section is arranged in a semi-circular arc along the inner wall of the cylinder, and maintains a gap with the inner wall of the cylinder; or, the bottom section passes laterally through the central area of ​​the bottom of the cylinder and avoids the stirring shaft.

3. The heating and stirring vessel according to claim 2, characterized in that: The inner sidewall of the cylinder is welded with several horizontally spaced first clamps, each with a vertically penetrating first groove. The first vertical section and the second vertical section pass through the corresponding first groove.

4. A heating and stirring vessel according to claim 3, characterized in that: The stirring blades are arranged in several groups with vertical spacing along the stirring shaft, and the stirring blades are vertically offset from the first clamp.

5. A heating and stirring vessel according to claim 1, characterized in that: The turbulence-type heating tube is a spiral heating tube that extends spirally around the stirring shaft; several vertically spaced second clamps are welded to the inner side wall of the cylinder, and the second clamps are provided with circumferentially through second grooves, which are open towards the center of the vessel; the spiral heating tube passes through the corresponding second groove.

6. A heating and stirring vessel according to claim 5, characterized in that: The spiral heating tube has a variable pitch design, with the pitch in the bottom area being smaller than that in the middle area, and the pitch in the middle area being smaller than that in the top area.

7. A heating and stirring vessel according to claim 1, characterized in that: The stirring blades and the stirring shaft adopt a modular and detachable connection structure, which can be any one of flange bolt connection, clamp-type clamp connection or tapered sleeve connection with keyway.

8. A heating and stirring vessel according to claim 1, characterized in that: The vessel is equipped with multiple temperature sensors, which are located at least in the upper, middle and lower parts of the vessel, and are positioned away from the stirring shaft and stirring blades.

9. A heating and stirring vessel according to claim 1, characterized in that: The stirring blades are arranged in several groups with vertical spacing along the stirring shaft. The lowest group of stirring blades is located inside the concave spherical cap and is lower than the lower end of the turbulence heating tube. The remaining stirring blades are located inside the cylindrical body.

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