Raw material preheating device for dimethyl sulfoxide rectification
By rotating the inner drum, the raw materials in the outer drum are stirred and hot water is circulated, which solves the problem of uneven heating of dimethyl sulfoxide raw materials, achieves a more uniform heating effect, and improves heating efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 山东胜华国宏新材料有限公司
- Filing Date
- 2025-07-30
- Publication Date
- 2026-06-26
AI Technical Summary
During the heating process, the high viscosity of dimethyl sulfoxide raw material results in poor fluidity, forming a stagnant boundary layer, which leads to uneven heating and affects the thermal conductivity and product quality.
The system employs an inner and outer barrel structure. The rotation of the inner barrel agitates the raw materials inside the outer barrel. Combined with hot water circulation and a heat-conducting rod, it achieves uniform heat distribution. The driving mechanism rotates the hot water in both the inner and outer barrels, ensuring uniform heat transfer.
This method achieves uniform heating of dimethyl sulfoxide raw materials, avoids uneven heating, and improves heating efficiency and product quality.
Smart Images
Figure CN224404401U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of raw material preheating technology, specifically a raw material preheating device for dimethyl sulfoxide distillation. Background Technology
[0002] Dimethyl sulfoxide (DMSO) is an important high-boiling-point polar solvent widely used in the pharmaceutical, chemical, and electronics industries. In the DMSO production process, crude product needs to be purified through distillation, and the preheating of the raw material before distillation is a critical step affecting energy efficiency and product quality.
[0003] Currently, when raw materials are preheated, due to their high viscosity (≥1.9 mPa·s at room temperature) and the tendency to form localized gels as the temperature rises, high-viscosity raw materials have poor flowability at the heating interface, forming a stagnant boundary layer, which significantly reduces the thermal conductivity coefficient. Consequently, the internal and external temperatures are inconsistent during heating, affecting the heating effect. Utility Model Content
[0004] This invention provides a preheating device for raw materials used in dimethyl sulfoxide distillation, which addresses the deficiencies in the prior art.
[0005] This utility model is achieved through the following technical solution:
[0006] A preheating device for raw materials in dimethyl sulfoxide distillation includes an outer barrel and a thermally conductive inner barrel coaxially disposed within the outer barrel. The lower end of the inner barrel is closed and connected to a vertical pipe, which extends through the bottom surface of the outer barrel and is rotatably connected to the bottom surface of the outer barrel via a sealed bearing. The lower end of the vertical pipe is connected to a water inlet pipe via a bearing, and the water inlet pipe is connected to a hot water source. The vertical pipe is driven by a drive mechanism to rotate along its axis. A first inner cavity is formed from the side to the bottom of the inner barrel. Several strip-shaped grooves are formed on the inner wall of the side of the inner barrel. The sides of the strip-shaped grooves penetrate the first inner cavity and extend outward to the outer wall of the inner barrel. The outer barrel and the inner barrel are connected via the strip-shaped grooves. The first inner cavity is connected to the vertical pipe. A lower horizontal pipe with closed ends is provided horizontally above the inner barrel. The lower horizontal pipe is connected to the first inner cavity and is vertically and rotatably connected to a water outlet pipe via a bearing. An outer lever is vertically provided on the outer wall of the inner barrel.
[0007] In use, the raw materials are placed in the outer bucket and enter the inner bucket through the strip groove. Therefore, both the inner and outer buckets contain raw materials. Then, hot water is introduced into the water inlet pipe. The hot water enters the first inner cavity through the water inlet pipe and the vertical pipe and moves from bottom to top, heating the inner bucket. After heating, the hot water continues to rise through the first inner cavity into the lower horizontal pipe and then into the water outlet pipe and flows out. Since there are raw materials on both the outer and inner sides of the inner bucket, the heat generated by the inner bucket is more evenly distributed into the outer and inner buckets. Driven by the drive mechanism, the vertical pipe rotates, which drives the inner bucket to rotate, and in turn drives the outer lever to rotate, making the heat more even.
[0008] Preferably, an inner lever is vertically connected to the inner wall of the inner barrel. Both the inner and outer levers are heat-conducting pipes with closed ends and communicate with the first inner cavity. The inclusion of an outer lever, and the fact that both the outer and inner levers are heat-conducting pipes, enables more uniform heating of the raw materials when the inner barrel rotates.
[0009] Preferably, the outer barrel has a second inner cavity extending from its inner side to its bottom. The outer wall of the outer barrel is an insulation board, and the inner wall is a heat-conducting board. The vertical pipe includes an upper vertical pipe and a lower vertical pipe. The upper end of the upper vertical pipe is vertically connected to the center of the bottom surface of the inner barrel and communicates with the first inner cavity. The lower end of the upper vertical pipe is rotatably connected to the inner wall of the bottom surface of the outer barrel via a bearing and communicates with the second inner cavity. The upper part of the lower vertical pipe is vertically opposite to the lower part of the first vertical pipe and is rotatably connected to the second inner cavity via a bearing. A horizontal connecting rod is fixedly connected to the top surface of the first vertical pipe and the top surface of the second vertical pipe. The two horizontal connecting rods are fixedly connected to each other via a vertical connecting pipe located on the vertical axis of the first vertical pipe. The lower end of the lower vertical pipe is rotatably connected to the water outlet pipe via a bearing. The second inner cavity provided in the outer barrel can further achieve uniform heating of the raw materials. At the same time, hot water can enter the second inner cavity and the upper vertical pipe through the lower vertical pipe, and the hot water entering the upper vertical pipe enters the first inner cavity, realizing the supply of hot water to the first inner cavity and the second inner cavity.
[0010] Preferably, the top surface of the outer tub is vertically connected to an upper connecting pipe that communicates with the second inner cavity. The upper connecting pipes are connected to an upper horizontal pipe that is closed at both ends. The upper horizontal pipe is rotatably connected downwards via a bearing and is connected to a lower connecting pipe. The lower end of the lower connecting pipe is vertically connected to and communicates with the lower horizontal pipe. The upper horizontal pipe is vertically connected upwards and is connected to a water outlet pipe. Hot water in the second inner cavity enters the upper horizontal pipe through the upper connecting pipe, while hot water in the first inner cavity enters the upper horizontal pipe through the lower connecting pipe and mixes with the hot water in the second inner cavity in the upper horizontal pipe before flowing out together. This flow of water in the first and second inner cavities achieves better heating.
[0011] Preferably, the drive mechanism includes a drive motor fixedly mounted on the bottom surface of the outer tub, with the drive motor's shaft facing downwards and a drive gear fixedly fitted onto it. A driven gear meshing with the drive gear is fixedly fitted onto the lower part of the lower vertical tube. The rotation of the drive motor's shaft drives the rotation of the drive gear, which in turn drives the rotation of the driven gear, thereby achieving the rotation of the lower vertical tube and the rotation of the inner tub.
[0012] As a preferred option, the device also includes a heating tank with a heating function. The heating tank is equipped with a circulation pump, with the inlet pipe connected to the circulation pump and the outlet pipe connected to the inlet of the heating tank. The circulation pump can deliver the heated hot water to the inlet pipe, while the water in the outlet pipe enters the heating tank, thus realizing the recycling of hot water and ensuring the heating effect.
[0013] The beneficial effects of this utility model are as follows: By setting an inner barrel and an outer barrel, the heat source will not be too far away from the raw material, thereby achieving more uniform heating and avoiding uneven heating. At the same time, the rotation of the inner barrel can drive the stirring of the raw material in the inner barrel and the outer barrel, achieving more uniform heating. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 yes Figure 1 A magnified view of part of I.
[0017] As shown in the figure:
[0018] 1. Outer tub, 2. Inner tub, 3. Outer lever, 4. Inner lever, 5. First inner cavity, 6. Second inner cavity, 7. Vertical pipe, 8. Inlet pipe, 9. Outlet pipe, 10. Drive motor, 11. Drive gear, 12. Driven gear, 13. Upper horizontal pipe, 14. Lower horizontal pipe, 15. Heating tub, 16. Strip groove, 71. Upper vertical pipe, 72. Lower vertical pipe. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model 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, 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.
[0020] Preheating device for feedstock in dimethyl sulfoxide distillation, such as Figure 1 and Figure 2As shown. The device includes an outer tub 1 and a thermally conductive inner tub 2 coaxially disposed within the outer tub 1. The lower end of the inner tub 2 is closed and connected to a vertical pipe 7. The vertical pipe 7 extends out of the bottom surface of the outer tub 1 and is rotatably connected to the bottom surface of the outer tub 1 via a sealed bearing. The lower end of the vertical pipe 7 is connected to a water inlet pipe 8 via a bearing, and the water inlet pipe 8 is connected to a hot water source. The vertical pipe 7 is driven by a drive mechanism to rotate along its axis. A first inner cavity 5 is formed from the side to the bottom surface of the inner tub 2. Several strip grooves 16 are formed on the inner wall of the side of the inner tub 2. The sides of the strip grooves 16 penetrate the first inner cavity 5 and extend outward to the outer wall of the inner tub 2. The outer tub 1 and the inner tub 2 are connected via the strip grooves 16. The first inner cavity 5 is connected to the vertical pipe 7. A lower horizontal pipe 14 with closed ends is provided horizontally above the inner tub 2. The lower horizontal pipe 14 is connected to the first inner cavity 5 and is vertically and rotatably connected to a water outlet pipe 9 via a bearing. An outer lever 3 is vertically arranged on the outer wall of the inner tub 2. A discharge pipe controlled by a valve is connected to the lower part of the outer tub.
[0021] The outer barrel 1 has a second inner cavity 6 formed from its inner side to its bottom. The outer wall of the outer barrel 1 is an insulation board, and the inner wall is a heat-conducting board. The vertical pipe 7 includes an upper vertical pipe 71 and a lower vertical pipe 72. The upper end of the upper vertical pipe 71 is vertically connected to the center of the bottom surface of the inner barrel 2 and communicates with the first inner cavity 5. The lower end of the upper vertical pipe 71 is rotatably connected to the inner wall of the bottom surface of the outer barrel 1 through a bearing and communicates with the second inner cavity 6. The upper part of the lower vertical pipe 72 is vertically opposite to the lower part of the first vertical pipe 7 and is rotatably connected to the second inner cavity 6 through a bearing. The top surface of the first vertical pipe 7 and the top surface of the second vertical pipe 7 are fixedly connected with horizontal connecting rods. The two horizontal connecting rods are fixedly connected to each other through a vertical connecting pipe located on the vertical axis of the first vertical pipe 7. The lower end of the lower vertical pipe 72 is rotatably connected to the water outlet pipe 9 through a bearing and communicates with it.
[0022] The top surface of the outer tub 1 is vertically connected to an upper connecting pipe that communicates with the second inner cavity 6. The upper connecting pipes are connected to each other via an upper horizontal pipe 13 that is closed at both ends. The upper horizontal pipe 13 is rotatably connected downwards via a bearing and is connected to a lower connecting pipe. The lower end of the lower connecting pipe is vertically connected to and communicates with the lower horizontal pipe 14. The upper horizontal pipe 13 is vertically connected upwards to and communicates with a water outlet pipe 9.
[0023] The outer barrel 1 is provided with a second inner cavity 6, which can further achieve uniform heating of the raw materials. At the same time, hot water can enter the second inner cavity 6 and the upper vertical pipe 71 through the lower vertical pipe 72. The hot water entering the upper vertical pipe 71 then enters the first inner cavity 5, thus realizing the supply of hot water to the first inner cavity 5 and the second inner cavity 6.
[0024] A lid can be installed on the top surface of the outer barrel 1. Specifically, a support plate is fixedly installed on the upper part of the inner wall of the outer barrel 1, and the lid is placed on the support plate to achieve a sealing heating effect. A feed pipe is opened on the lid, and the feed pipe is sealed by a threaded cap.
[0025] In use, the raw materials are placed in the outer drum 1 and enter the inner drum 2 through the strip groove 16. Therefore, both the inner drum 2 and the outer drum 1 contain raw materials. Then, hot water is introduced into the water inlet pipe 8. The hot water enters the lower vertical pipe 72 through the water inlet pipe 8, and then enters the second inner cavity 6 and the upper vertical pipe 71 through the lower vertical pipe 72, moving upwards. The hot water in the upper vertical pipe 71 enters the first inner cavity 5, and the heated hot water in the inner drum 2 and the outer drum 1 continues to rise. The hot water in the first inner cavity 5 enters the lower horizontal pipe 14 and then the lower horizontal pipe 1... 4. The hot water enters the upper horizontal pipe 13 and mixes with the hot water in the first inner cavity 5 before flowing out through the outlet pipe 9. Since there are raw materials on both the outer and inner sides of the inner barrel 2, the heat generated by the inner walls of the inner barrel 2 and the outer barrel 1 is more evenly distributed into the outer barrel 1 and the inner barrel 2. Driven by the drive mechanism, the lower vertical pipe 72 rotates, and the rotation of the lower vertical pipe 72 drives the upper vertical pipe 71 to rotate through the intermediate connecting pipe, which in turn drives the inner barrel 2 to rotate, and then drives the outer lever 3 to rotate, which makes the heat more even.
[0026] The driving mechanism includes a drive motor 10 fixedly mounted on the bottom surface of the outer tub 1. The shaft of the drive motor 10 faces downward and is fixedly fitted with a drive gear 11. A driven gear 12, meshing with the drive gear 11, is fixedly fitted onto the lower part of the lower vertical tube 72. The rotation of the drive motor 10 shaft drives the rotation of the drive gear 11, which in turn drives the rotation of the driven gear 12, thereby realizing the rotation of the lower vertical tube 72 and the rotation of the inner tub 2.
[0027] The inner wall of the inner barrel 2 is vertically connected to an inner lever 4. Both the inner lever 4 and the outer lever 3 are heat-conducting pipes with closed ends and communicate with the first inner cavity 5. The setting of the outer lever 3 and the fact that both the outer lever 3 and the inner lever 4 are heat-conducting pipes enables more uniform heating of the raw materials when the inner barrel 2 rotates.
[0028] It also includes a heating tank 15 with a heating function. The heating tank 15 is equipped with a circulation pump. The water inlet pipe 8 is connected to the circulation pump in the heating tank 15, and the water outlet pipe 9 is connected to the water inlet of the heating tank 15. The circulation pump can deliver the heated hot water to the water inlet pipe 8, while the water in the water outlet pipe 9 enters the heating tank 15, realizing the recycling of hot water and ensuring the heating effect.
[0029] The connection between pipes via bearings is existing technology and will not be described in detail here.
[0030] The use of this application, by setting the inner barrel 2 and the outer barrel 1, ensures that the heat source is not too far from any part of the raw material, thereby achieving more uniform heating and avoiding uneven heating. At the same time, the rotation of the inner barrel 2 can drive the stirring of the raw materials in the inner barrel 2 and the outer barrel 1, achieving more uniform heating.
[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A feed preheating device for dimethyl sulfoxide distillation, characterized in that: The device includes an outer tub and a heat-conducting inner tub coaxially disposed within the outer tub. The lower end of the inner tub is closed and connected to a vertical pipe. The vertical pipe extends through the bottom surface of the outer tub and is rotatably connected to the bottom surface of the outer tub via a sealed bearing. The lower end of the vertical pipe is connected to a water inlet pipe via a bearing, and the water inlet pipe is connected to a hot water source. The vertical pipe is driven by a drive mechanism to rotate along its axis. A first inner cavity is formed from the side to the bottom of the inner tub. Several strip-shaped grooves are formed on the inner wall of the side of the inner tub. The sides of the strip-shaped grooves penetrate the first inner cavity and extend outward to the outer wall of the inner tub. The outer tub and the inner tub are connected via the strip-shaped grooves. The first inner cavity is connected to the vertical pipe. A lower horizontal pipe with closed ends is provided horizontally above the inner tub. The lower horizontal pipe is connected to the first inner cavity and is vertically and rotatably connected to a water outlet pipe via a bearing. An outer lever is vertically provided on the outer wall of the inner tub.
2. The feed preheating device for dimethyl sulfoxide distillation according to claim 1, characterized in that: An inner lever is vertically connected to the inner wall of the inner barrel. Both the inner lever and the outer lever are heat-conducting pipes with closed ends and communicate with the first inner cavity.
3. The feed preheating device for dimethyl sulfoxide distillation according to claim 2, characterized in that: The outer barrel has a second inner cavity extending from its inner side to its bottom. The outer wall of the outer barrel is an insulation board, and the inner wall is a heat-conducting board. The vertical pipe includes an upper vertical pipe and a lower vertical pipe. The upper end of the upper vertical pipe is vertically connected to the center of the bottom surface of the inner barrel and communicates with the first inner cavity. The lower end of the upper vertical pipe is rotatably connected to the inner wall of the bottom surface of the outer barrel through a bearing and communicates with the second inner cavity. The upper part of the lower vertical pipe is vertically opposite to the lower part of the first vertical pipe and is rotatably connected to the second inner cavity through a bearing. A horizontal connecting rod is fixedly connected to the top surface of the first vertical pipe and the top surface of the second vertical pipe. The two horizontal connecting rods are fixedly connected to each other through a vertical connecting pipe located on the vertical axis of the first vertical pipe. The lower end of the lower vertical pipe is rotatably connected to the water outlet pipe through a bearing and communicates with it.
4. The feed preheating device for dimethyl sulfoxide distillation according to claim 3, characterized in that: The top surface of the outer tub is vertically connected to an upper connecting pipe that communicates with the second inner cavity. The upper connecting pipes are connected to each other via upper horizontal pipes that are closed at both ends. The upper horizontal pipes are rotatably connected downwards via bearings and are connected to a lower connecting pipe. The lower end of the lower connecting pipe is vertically connected to and communicates with the lower horizontal pipe. The upper horizontal pipes are vertically connected upwards and are connected to a water outlet pipe.
5. The feed preheating device for dimethyl sulfoxide distillation according to claim 4, characterized in that: The drive mechanism includes a drive motor fixedly mounted on the bottom surface of the outer barrel, with the drive motor's shaft facing downwards and a drive gear fixedly sleeved thereon, and a driven gear meshing with the drive gear fixedly sleeved at the lower part of the lower vertical tube.
6. The feed preheating device for dimethyl sulfoxide distillation according to claim 1, characterized in that: It also includes a heating tank with a heating function, which is equipped with a circulation pump. The water inlet pipe is connected to the circulation pump inside the heating tank, and the water outlet pipe is connected to the water inlet of the heating tank.