Internal and external heating type solid stirring kettle
By setting up an internal and external heating solid stirring tank in the stirring device, the inner coil assembly is used to increase the heat exchange area, and the problems of large temperature difference and low reaction efficiency during processing of high viscosity materials are solved, and the effects of uniform temperature, high reaction efficiency and low cost are achieved.
Patent Information
- Application Number
- CN202420638458.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-03-29
AI Technical Summary
When the existing external heating jacketed stirring device treats high viscosity materials, it leads to a large temperature difference between the materials at the center of the stirring tank and the materials at the kettle wall, and the reaction heat exchange effect is poor, resulting in poor reaction effect, longer reaction time, and low solid reaction efficiency, increasing side reactions, and the yield of the main product is reduced.
The internal and external heating solid stirring tank is adopted. By setting an inner coil assembly inside the cylinder assembly, including the heating inner coil, the heat exchange area of the entire system is increased, and the heat transfer method is changed from one-way to two-way, and the heat transfer efficiency is higher.
It achieves a small temperature difference in the agitator, improves the solid reaction efficiency, reduces side reactions, improves the yield of the main product, is more stable in production, has high thermal efficiency, low thermal media consumption, and is low in production and operation cost.
Smart Images
Figure CN222641748U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a material stirring device, in particular to an internally and externally heated solid stirring kettle. Background Art
[0002] At present, in most industries such as heat treatment and reaction of high-viscosity materials, externally heated jacketed stirring devices are mainly used. Since the heat transfer coefficient of viscous materials is small, it is difficult for the heat from the outer wall to be transferred to the center of the kettle. Therefore, there is a large temperature difference between the material in the center of the stirring kettle and the material on the wall of the kettle. The reaction heat exchange effect of the stirring reactor is poor, resulting in poor reaction effect and prolonged reaction time. The processing capacity of a single device is reduced and the production cost is increased. The large temperature difference in the stirring device will also lead to low solid-state reaction efficiency, increased side reactions, reduced yield of the main product, and poor stability of the stirring material system. In addition, anchor agitators are generally used for high-viscosity materials. The material in the stirring kettle will experience vortex flow, the relative movement of the material is weak, and the mixing effect is poor. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide an internally and externally heated solid stirring kettle, so as to achieve the purpose of small temperature difference in the stirring device.
[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:
[0005] A solid stirring kettle with internal and external heating comprises a barrel assembly, an outer jacket assembly and a stirring assembly, wherein the outer jacket assembly is arranged on the periphery of the barrel assembly and the stirring assembly is installed inside the barrel assembly; an inner coil assembly is arranged inside the barrel assembly, and the inner coil assembly includes a heating inner coil, and an inner coil heating medium inlet and an inner coil heating medium outlet are respectively arranged at both ends of the heating inner coil.
[0006] Furthermore, the cylinder assembly includes an inner cylinder, an upper head is installed on the top of the inner cylinder, and an inner head is installed on the bottom of the inner cylinder.
[0007] Furthermore, a fixed vertical rod is vertically fixed inside the inner cylinder, the top of the fixed vertical rod is fixedly connected to the upper head, and the heating inner coil is fixedly connected to the fixed vertical rod.
[0008] Furthermore, the heating inner coil is connected and fixed to the fixed vertical rod through a U-shaped clip.
[0009] Furthermore, a number of threaded steel bars are evenly and vertically arranged on the inner wall of the inner cylinder.
[0010] Furthermore, the outer jacket assembly includes a jacket cylinder, which is arranged on the outside of the inner cylinder, and a heating jacket is arranged at the bottom of the jacket cylinder.
[0011] Furthermore, an external jacket heating medium outlet and an external jacket heating medium inlet are provided on the jacket cylinder.
[0012] Furthermore, the stirring assembly includes a stirring shaft, an anchor-type stirring wing, a stirring wing oblique support and a stirring shaft sleeve. The top end of the stirring shaft is directly or indirectly connected to the output end of the stirring motor; the bottom end of the stirring shaft is connected to the anchor-type stirring wing, the stirring shaft sleeve is fixedly connected to the stirring shaft, and the two ends of the stirring wing oblique support are respectively connected to the anchor-type stirring wing and the stirring shaft sleeve.
[0013] The utility model is provided with a heating inner coil inside, which increases the heat exchange area of the entire system, improves the heat transfer mode from one-way to two-way, has higher heat transfer efficiency, and reduces the temperature difference in the stirring device.
[0014] The stirring kettle provided by the utility model has high solid-state reaction efficiency, few side reactions, and high yield of the main product; the production is more stable, the thermal efficiency is high, the heat medium consumption is low, and the production and operation cost is low.
[0015] The internal and external heating solid stirring kettle provided by the utility model can be applied to chemical reaction, heating, heat preservation and other operations of materials with relatively high viscosity coefficients, such as solid, semi-solid and paste-like materials. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a structural diagram of an internally and externally heated solid stirring kettle provided by the utility model;
[0017] Figure 2 This is a top view of the internal and external heating solid stirring kettle provided by the utility model;
[0018] Figure 3 This is a schematic diagram of the connection and fixation of the heating inner coil and the fixed vertical rod.
[0019] In the figure, 1-external jacket heating medium outlet, 2-material outlet, 3-heating jacket, 4-inner head, 5-anchor stirring wing, 6-jacketed cylinder, 7-inner cylinder, 8-stirring shaft, 9-ear support, 10-manhole, 11-connecting pad, 12-double-end mechanical seal, 13-fixed bracket, 14-stirring motor, 15-inner coil heating medium inlet, 16-inner coil heating medium outlet, 17-thermometer port, 18 -Upper head, 19-External jacket heating medium inlet, 20-Fixed vertical rod, 21-U-shaped card, 22-Thermometer sleeve, 23-Heating inner coil, 24-Agitator wing inclined support, 25-Agitator shaft jacket, 26-Support pad, 27-Feed port, 28-Manhole hinge, 29-Manhole handle, 30-Sightglass light hole, 31-Gas phase outlet, 32-Nameplate, 33-Threaded steel bar, 34-Feed spare port, 35-Observation port. DETAILED DESCRIPTION
[0020] like Figure 1 As shown, a typical embodiment of the present invention provides an internal and external heating solid stirring kettle, which includes a barrel assembly, an outer jacket assembly and a stirring assembly. The outer jacket assembly is arranged on the periphery of the barrel assembly, and the stirring assembly is installed inside the barrel assembly.
[0021] Based on this, this embodiment incorporates an inner coil assembly within the cylinder assembly. This inner coil assembly includes a heating inner coil 23, with an inner coil heating medium inlet 15 and an inner coil heating medium outlet 16 located at either end. The heating inner coils 23 are designed to rise in a concentric spiral. The spacing between the heating inner coils 23 should not be too close to prevent material jamming; a clearance of 10 to 30 mm is generally appropriate. When using a gaseous medium such as steam, a top-in, bottom-out method is used. When using a liquid medium such as thermal oil, a bottom-in, top-out method is used.
[0022] This embodiment increases the heat exchange area of the entire system by adding an inner coil assembly, improves the heat transfer mode from one-way to two-way, and has higher heat transfer efficiency.
[0023] In a relatively specific embodiment, the cylinder assembly includes an inner cylinder 7, an upper head 18 is installed on the top of the inner cylinder 7, and a feed port 27 and a gas phase outlet 31 are provided on the upper head 18. An inner head 4 is installed on the bottom of the inner cylinder 7.
[0024] like Figure 1 As shown, a manhole 10 is provided on one side of the top of the upper head 18. Figure 2 As shown, the cover of the manhole 10 is equipped with a manhole handle 29, and the cover of the manhole 10 is connected via a manhole hinge 28. A thermometer port 17 is provided on the other side of the top of the upper head 18, into which a thermometer well 22 is inserted. The thermometer well 22 should extend 200-500 mm below the liquid level. To resist the impact of the material, a support is required, welded to the inner wall of the kettle.
[0025] In addition, the upper head 18 is also provided with a sight glass light hole 30, a nameplate 32, a feed standby port 34 and an observation port 35. Among them, the sight glass light hole 30 is installed with a sight glass and remains in a constant light state. The operator can observe the stirring reaction state of the material in the kettle through the observation port 35.
[0026] In a preferred embodiment, to secure the inner heating coil 23 within the inner cylinder 7, a fixed vertical rod 20 is vertically fixed within the inner cylinder 7. The top of the fixed vertical rod 20 is fixedly connected to the upper head 18, and the inner heating coil 23 is fixedly connected to the fixed vertical rod 20. The fixed vertical rod 20 is made of square steel with a size of 20 to 50 mm. Its main function is to secure the inner heating coil 23, and it also provides reverse stirring.
[0027] like Figure 3As shown, the heating inner coil 23 is connected and fixed to the fixed vertical rod 20 by a U-shaped clamp 21, and a double nut and a flat washer are matched on the U-shaped clamp 21. The two ends of the U-shaped clamp 21 pass through the fixed vertical rod 20, and then the two ends of the U-shaped clamp 21 are locked with double nuts.
[0028] In a preferred embodiment, a plurality of threaded steel bars 33 are uniformly and vertically arranged on the inner wall of the inner cylinder 7. Specifically, the threaded steel bars 33 have a diameter of 8-10 mm, with 6-10 of them evenly distributed along the inner wall of the kettle. These bars 33 prevent the material from sliding along the kettle wall, providing reverse stirring, increasing convection and enhancing the stirring effect. The reverse flow blocking effect of the threaded steel bars prevents swirling of the material within the stirred kettle, resulting in a better mixing effect.
[0029] In a relatively specific embodiment, the outer jacket assembly includes a jacket cylinder 6, which is disposed outside the inner cylinder 7. A heating jacket 3 is disposed at the bottom of the jacket cylinder 6. An external jacket heating medium outlet 1 and an external jacket heating medium inlet 19 are disposed above the jacket cylinder 6. The external jacket heating medium can be gaseous steam or liquid thermal oil. Steam is used in a top-in, bottom-out manner, while thermal oil is used in a bottom-in, top-out manner.
[0030] like Figure 1 As shown, an ear-type support 9 is provided on the side wall of the jacket cylinder 6 , and a support pad 26 is provided between the ear-type support 9 and the jacket cylinder 6 .
[0031] In a relatively specific embodiment, the stirring assembly includes a stirring shaft 8, an anchor stirring wing 5, a stirring wing inclined support 24 and a stirring shaft sleeve 25. The top of the stirring shaft 8 is connected to the output end of the stirring motor 14 through a reducer. The bottom end of the stirring shaft 8 is connected to the anchor stirring wing 5, the stirring shaft sleeve 25 is fixedly connected to the stirring shaft 8, and the two ends of the stirring wing inclined support 24 are respectively connected to the anchor stirring wing 5 and the stirring shaft sleeve 25.
[0032] In this embodiment, the anchor stirring fin 5 is constructed of round steel. The outer edge of the anchor stirring fin is 10-30 mm away from the inner wall of the kettle to ensure effective stirring. An inclined stirring fin support 24 is provided at the lower middle portion of the anchor stirring fin 5. The inclined stirring fin support 24 is constructed of round steel and serves to ensure the structural stability of the anchor stirring fin 5 while also providing a certain stirring effect. The stirring shaft shield 25 connects the stirring shaft 8 to the inclined stirring fin support 24, preventing thermal stress damage to the shaft caused by direct welding of the inclined stirring fin support 24 to the stirring shaft 8.
[0033] A connecting plate 11 is located in the middle of the upper end cap 18. Mounting holes for the stirring shaft 8 of the stirring assembly are provided in both the upper end cap 18 and the connecting plate 11. A double-end mechanical seal 12 is installed between the connecting plate 11 and the stirring shaft 8 to ensure a leak-proof sealing of the stirring system. A fixing bracket 13 is also located at the top of the upper end cap 18, to which the stirring motor 14 is fixed.
[0034] like Figure 1 As shown, the heating inner coil 23 is arranged between the stirring shaft 8 and the anchor stirring wing 5. The heating inner coil 23 is arranged concentrically with the stirring shaft 8, which avoids structural conflicts and ensures sufficient stirring and mass transfer effects. The temperature difference between the material at the center of the stirring kettle and the material on the kettle wall is small.
Claims
1. An internal and external heating solid stirring kettle, comprising a barrel assembly, an outer jacket assembly and a stirring assembly, wherein the outer jacket assembly is arranged on the periphery of the barrel assembly, and the stirring assembly is installed inside the barrel assembly; characterized in that: An inner coil assembly is arranged inside the cylinder assembly, and the inner coil assembly includes a heating inner coil, and an inner coil heating medium inlet and an inner coil heating medium outlet are respectively arranged at both ends of the heating inner coil; The cylinder assembly comprises an inner cylinder, an upper head is installed on the top of the inner cylinder, and an inner head is installed on the bottom of the inner cylinder; a fixed vertical rod is vertically fixed inside the inner cylinder, the top of the fixed vertical rod is fixedly connected to the upper head, and the heating inner coil is connected and fixed to the fixed vertical rod by a U-shaped clamp; A number of threaded steel bars are evenly and vertically arranged on the inner wall of the inner cylinder.
2. The internally and externally heated solid stirring kettle according to claim 1, characterized in that: The outer jacket assembly comprises a jacket cylinder, which is arranged outside the inner cylinder, and a heating jacket is arranged at the bottom of the jacket cylinder.
3. The internally and externally heated solid stirring kettle according to claim 2, characterized in that: An external jacket heating medium outlet and an external jacket heating medium inlet are arranged on the jacket cylinder.
4. The internally and externally heated solid stirring kettle according to claim 1, 2 or 3, characterized in that: The stirring assembly includes a stirring shaft, an anchor stirring wing, a stirring wing oblique support and a stirring shaft sleeve. The top end of the stirring shaft is directly or indirectly connected to the output end of the stirring motor; the bottom end of the stirring shaft is connected to the anchor stirring wing, the stirring shaft sleeve is fixedly connected to the stirring shaft, and the two ends of the stirring wing oblique support are respectively connected to the anchor stirring wing and the stirring shaft sleeve.