Apparatus for separating a butanol and butyl acetate azeotrope
By designing an azeotropic evaporation mechanism, the gas-liquid contact area and mixing uniformity are increased, solving the problems of insufficient evaporation surface area and low mixing efficiency in traditional equipment, and achieving efficient azeotropic separation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DONGYING YISHENG CHEM CO LTD
- Filing Date
- 2026-04-03
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional butanol and butyl acetate mixture evaporation separation equipment suffers from limited evaporation surface area, low mixing efficiency, and poor mass and heat transfer, failing to meet the demands of efficient industrial separation.
An azeotropic evaporation mechanism is adopted, including components such as a rotating rod, connecting plate, actuating plate, and separating plate. By rotating, shearing, and agitating, the gas-liquid contact area and mixing uniformity are increased, thereby improving evaporation efficiency and separation effect.
It significantly improves evaporation and separation efficiency, shortens azeotropic dissociation time, enhances mass and heat transfer effects, ensures efficient separation of azeotropes under low pressure conditions, and avoids decomposition caused by local overheating.
Smart Images
Figure CN122097993A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of azeotropic separation technology, specifically to a device for separating butanol and butyl acetate azeotropes. Background Technology
[0002] Azeotropy refers to the phenomenon where a mixture of two or more liquid components in a specific ratio boils under constant pressure, and the vapor composition of the mixture is the same as that of the solution. This essentially means that the vapor produced during boiling has the exact same composition as the liquid itself.
[0003] The patent application with publication number CN113842860A describes a butanol and butyl acetate azeotrope separation device, which specifically includes a reaction cylinder, a rotating rod rotatably mounted inside the reaction cylinder, and a stirring mechanism and a refining mechanism coaxially mounted on the surface of the rotating rod. The refining mechanism includes a grinding disc, a grinding plate, a sliding part, and an adjusting part.
[0004] Traditional butanol and butanol acetate mixture evaporation separation equipment suffers from limited evaporation surface area and low mixing efficiency. Conventional stirring devices can only perform simple stirring, resulting in insufficient contact area between the mixture and air per unit volume, which limits the evaporation rate. At the same time, the mixture is difficult to form a uniform vortex, affecting mass and heat transfer, and failing to meet the requirements of efficient industrial separation. Summary of the Invention
[0005] To address the shortcomings of existing technologies, this invention provides a butanol and butyl acetate azeotrope separation device, thereby achieving the goal of solving the aforementioned problems.
[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a butanol and butyl acetate azeotropic separation device, comprising a support leg, a stirring tank fixedly connected to the top of the support leg, a separation port fixedly connected to the top of the stirring tank, a separation tube fixedly connected to the top of the separation port, and an azeotropic evaporation mechanism provided inside the stirring tank; The azeotropic evaporation mechanism includes: A rotating rod is provided, with a motor fixedly connected to one end. The top of the motor is fixedly connected to the bottom of the mixing tank. The outer wall of the rotating rod is rotatably connected to the inner wall of the mixing tank. A fixed sleeve is rotatably connected to the outer wall of the rotating rod. The top of the fixed sleeve is rotatably connected to the top of the inner wall of the mixing tank via a bearing. A connecting plate, one end of which is fixedly connected to the outer wall of the rotating rod, the bottom of which is slidably connected to the bottom of the inner wall of the mixing tank, and a toggle plate fixedly connected to the top of which.
[0007] Preferably, the actuating plate is a square frame, the bottom of the actuating plate is fixedly connected to the top of the connecting plate, and a diversion groove is formed on the inner wall of the actuating plate.
[0008] Preferably, the inner wall of the diversion channel is a square groove, and a separation plate is fixedly connected to the outer wall of the fixing sleeve. The separation plate is a square plate structure.
[0009] Preferably, a fixing block is fixedly connected to one side of the separation plate, the fixing block having a triangular cross-section, and a diversion plate is fixedly connected to the other side of the separation plate.
[0010] Preferably, a recessed groove is provided on one side of the diverter plate, and the separation plates are arranged in annular equidistant arrays on the outer wall of the fixed sleeve.
[0011] Preferably, the outer wall of the connecting plate is provided with a toggle mechanism, the toggle mechanism including a rotating shaft, the rotating shaft being rotatably connected to the outer wall of the connecting plate.
[0012] Preferably, the outer wall of the rotating shaft is fixedly connected to an opening and closing plate, and the outer wall of the opening and closing plate is fixedly connected to a first connecting block.
[0013] Preferably, an elastic strip is fixedly connected to the outer wall of the first connecting block, and a second connecting block is fixedly connected to one end of the elastic strip. The second connecting block is fixedly connected to the top of the connecting plate.
[0014] This invention provides a device for separating butanol and butyl acetate azeotropic mixtures. It has the following advantages: 1. This invention sets up an azeotropic evaporation mechanism, in which the mixture inside the stirring tank is rotated and agitated. After rotation and agitation, the mixture rotates in a vortex inside the stirring tank, which increases the surface area of the mixture that was originally in contact with the air for evaporation in the stirring tank. In the same size stirring tank, its evaporation efficiency is improved. At the same time, the mixing and agitation further enhance the evaporation effect and improve the evaporation separation efficiency. 2. The present invention sets up an azeotropic evaporation mechanism. When the agitator plate is turned, the mixture is fully dispersed through the diversion tank, so that the mixture can be dispersed. The dispersed liquids roll and mix with each other, which further enhances the heat and mass transfer effect between molecules, significantly shortens the dissociation time of the azeotrope, and also ensures the uniformity of mixing, avoiding local overheating that leads to the thermal decomposition of butyl acetate. 3. This invention sets up an azeotropic evaporation mechanism, in which the separation plate performs lateral shearing. The shearing action separates the liquid during shearing, increasing the contact area with air in a short time. Through continuous shearing and continuous renewal, the mass transfer rate at the gas-liquid interface is greatly enhanced, thereby improving the azeotropic efficiency of the mixed liquid. 4. By setting up an azeotropic evaporation mechanism, the present invention forms a finer liquid film at the outlet of the flow divider plate, which comes into contact with the gas flow, significantly improving the gas-liquid two-phase contact efficiency per unit volume. This ensures that the azeotrope is efficiently dissociated under low pressure conditions. In this way, the azeotrope can be separated efficiently with a larger gas-liquid contact area and a shorter mass transfer path, further improving the vaporization separation efficiency. 5. This invention, by setting up an azeotropic evaporation mechanism, periodically taps and disturbs the azeotrope below through opening and closing plates, enhancing the energy transfer of the liquid at the bottom. In conjunction with the connecting plate, the residue is pushed up. Through the rotation and tapping of the opening and closing plates, and the rotation direction of the opening and closing plates, the liquid at the bottom of the stirring tank is pushed upward, thus forming a spiral disturbance flow state from bottom to top. This allows the high-boiling-point components at the bottom to be continuously entrained to the shear zone to participate in mass transfer, significantly alleviating local overheating and concentration polarization phenomena, and ensuring that the azeotropic system maintains stable separation performance over a wide load range. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the azeotropic evaporation mechanism of the present invention. Figure 1 ; Figure 3 For the present invention Figure 2 Enlarged view of point A; Figure 4 This is a schematic diagram of the azeotropic evaporation mechanism of the present invention. Figure 2 ; Figure 5 This is a bottom view of the azeotropic evaporation mechanism of the present invention; Figure 6 This is a schematic diagram of the azeotropic evaporation mechanism of the present invention. Figure 3 ; Figure 7 This is a schematic diagram of the structure of the toggle plate of the present invention; Figure 8 This is a schematic diagram of the actuation mechanism of the present invention.
[0016] In the diagram: 1. Support leg; 2. Stirring tank; 3. Azeotropic evaporation mechanism; 301. Rotating rod; 302. Connecting plate; 303. Actuating plate; 304. Diverter; 305. Fixing sleeve; 306. Separator; 307. Fixing block; 308. Diverter; 309. Recessed groove; 4. Actuating mechanism; 401. Rotating shaft; 402. Opening and closing plate; 403. First connecting block; 404. Elastic strip; 405. Second connecting block; 5. Motor; 6. Separation port; 7. Separation tube. Detailed Implementation
[0017] Example 1: Please refer to Figure 1-3 The present invention provides a technical solution: a butanol and butyl acetate azeotropic separation device, including a support leg 1, a stirring tank 2 fixedly connected to the top of the support leg 1, a separation port 6 fixedly connected to the top of the stirring tank 2, a separation tube 7 fixedly connected to the top of the separation port 6, and an azeotropic evaporation mechanism 3 provided inside the stirring tank 2. The azeotropic evaporation mechanism 3 includes: A rotating rod 301 is fixedly connected to a motor 5 at one end. The top of the motor 5 is fixedly connected to the bottom of the mixing tank 2. The outer wall of the rotating rod 301 is rotatably connected to the inner wall of the mixing tank 2. A fixing sleeve 305 is rotatably connected to the outer wall of the rotating rod 301. The top of the fixing sleeve 305 is rotatably connected to the top of the inner wall of the mixing tank 2 through a bearing. The connecting plate 302 has one end fixedly connected to the outer wall of the rotating rod 301, the bottom of the connecting plate 302 is slidably connected to the bottom of the inner wall of the mixing tank 2, and the top of the connecting plate 302 is fixedly connected to the actuating plate 303.
[0018] During use, the mixture of butanol and butanol acetate is evaporated by heating inside the stirring tank 2, and then discharged through the separation port 6 and separation tube 7, thus completing the discharge of the two different substances.
[0019] Example 2: Please refer to Figure 1-7 Based on Embodiment 1, the present invention provides a technical solution: the actuating plate 303 is a square frame, the bottom of the actuating plate 303 is fixedly connected to the top of the connecting plate 302, and a diversion groove 304 is provided on the inner wall of the actuating plate 303.
[0020] The inner wall of the diversion channel 304 is a square groove, and the outer wall of the fixing sleeve 305 is fixedly connected to the separation plate 306, which is a square plate structure.
[0021] A fixing block 307 is fixedly connected to one side of the separation plate 306. The fixing block 307 has a triangular cross-section. A diversion plate 308 is fixedly connected to the other side of the separation plate 306.
[0022] A recessed groove 309 is provided on one side of the diverter plate 308, and the separation plates 306 are arranged in annular equidistant array on the outer wall of the fixed sleeve 305.
[0023] During external discharge, the rotating rod 301 is controlled to rotate by starting the motor 5. When the rotating rod 301 rotates, it drives the connecting plate 302 and the agitator plate 303 on the outer wall to rotate, thereby rotating and agitating the mixture inside the mixing tank 2. After rotation and agitation, the mixture rotates in a vortex inside the mixing tank 2, which increases the surface area of the mixture that was originally in contact with the air and evaporated in the mixing tank 2. In the same size mixing tank 2, its evaporation efficiency is improved. At the same time, the mixing and agitation further increases the evaporation effect and improves the evaporation separation efficiency. When the toggle plate 303 is turned, the mixture is fully dispersed through the diversion groove 304, so that the mixture can be dispersed. The dispersed liquids roll and mix with each other, further enhancing the heat and mass transfer effect between molecules, significantly shortening the azeotropic dissociation time, while also ensuring the uniformity of mixing and avoiding local overheating that leads to the thermal decomposition of butyl acetate. When the mixture is rotated in the mixing tank 2 by the agitator plate 303, the mixture will come into contact with the stationary separation plate 306 when it is subjected to centrifugal force and forms a vortex on the inner wall of the mixing tank 2. The mixture will be sheared laterally by the separation plate 306. The shearing action will separate the liquid during shearing, increasing the contact area with air in a short time. Through continuous shearing and continuous renewal, the mass transfer rate of the gas-liquid interface is greatly enhanced, thereby improving the azeotropic efficiency of the mixture. Simultaneously, the liquid is cut by the fixing block 307 in the separation plate 306. The liquid passes through the fixing block 307 and the separation plate 306 and then through the flow divider 308. The backward opening shape of the flow divider 308 guides and divides the liquid flow, allowing the liquid to be further separated by the flow divider 308. This results in a finer liquid film at the outlet of the flow divider 308, which contacts the gas flow, significantly improving the gas-liquid two-phase contact efficiency per unit volume. This ensures efficient dissociation of the azeotrope under low pressure conditions. In this way, the azeotrope can be separated efficiently with a larger gas-liquid contact area and a shorter mass transfer path, further improving the vaporization separation efficiency.
[0024] Example 3: Please refer to Figure 1-8 Based on Embodiment 1 and Embodiment 2, the present invention provides a technical solution: the outer wall of the connecting plate 302 is provided with a toggle mechanism 4, the toggle mechanism 4 includes a rotating shaft 401, the rotating shaft 401 is rotatably connected to the outer wall of the connecting plate 302.
[0025] The outer wall of the rotating shaft 401 is fixedly connected to the opening and closing plate 402, and the outer wall of the opening and closing plate 402 is fixedly connected to the first connecting block 403.
[0026] An elastic strip 404 is fixedly connected to the outer wall of the first connecting block 403. A second connecting block 405 is fixedly connected to one end of the elastic strip 404. The second connecting block 405 is fixedly connected to the top of the connecting plate 302.
[0027] The connecting plate 302 rotates within the stirring tank 2, continuously scraping up the residual liquid at the bottom of the stirring tank 2 and guiding it to the central area. Combined with the movement of the agitator plate 303 and the diversion guide plate 308, a closed-loop dynamic circulating flow field is formed. This flow field causes the liquid phase to repeatedly undergo shearing, dispersion, and redistribution processes within the evaporation chamber. Simultaneously, the connecting plate 302 drives the rotating shaft 401 and the opening / closing plate 402 to rotate. The opening / closing plate 402 is connected to the connecting plate 302 via the first connecting block 403, the elastic strip 404, and the second connecting block 405. The elasticity of the elastic strip 404 allows the opening / closing plate 402 to be pulled back to its original position. When the connecting plate 302 drives the rotating shaft 401 to rotate, it agitates the azeotropic material at the bottom of the stirring tank 2, increasing disturbance to the lower layer of the liquid and reducing sedimentation. Simultaneously, as the opening / closing plate 402 rotates and moves towards the separation plate 306, the solid... When the liquid reaches the fixed block 307, it will collide with the fixed block 307 and be pushed backward by the fixed block 307, causing the rotating shaft 401 to rotate until the opening and closing plate 402 disengages from the fixed block 307, the diverting plate 308, and the recessed groove 309. The elastic strip 404 pulls the opening and closing plate 402 with its own elasticity, causing the rotating shaft 401 to rotate in the opposite direction. Thus, the opening and closing plate 402 periodically taps and disturbs the azeotrope below, enhancing the energy transfer of the liquid at the bottom. It also works with the connecting plate 302 to push the residue up. Through the rotation and tapping of the opening and closing plate 402, and the rotation direction of the opening and closing plate 402, the liquid at the bottom of the stirring tank 2 is pushed upward, forming a spiral turbulent flow state from bottom to top. This allows the high-boiling-point components at the bottom to be continuously entrained to the shear zone to participate in mass transfer, significantly alleviating local overheating and concentration polarization, and ensuring that the azeotropic system maintains stable separation performance over a wide load range.
[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A butanol and butyl acetate azeotrope separation device, comprising a support leg (1), a stirring tank (2) fixedly connected to the top of the support leg (1), a separation port (6) fixedly connected to the top of the stirring tank (2), and a separation tube (7) fixedly connected to the top of the separation port (6), characterized in that: The stirring tank (2) is equipped with an azeotropic evaporation mechanism (3); The azeotropic evaporation mechanism (3) includes: A rotating rod (301) is fixedly connected to a motor (5) at one end. The top of the motor (5) is fixedly connected to the bottom of the mixing tank (2). The outer wall of the rotating rod (301) is rotatably connected to the inner wall of the mixing tank (2). A fixing sleeve (305) is rotatably connected to the outer wall of the rotating rod (301). The top of the fixing sleeve (305) is rotatably connected to the top of the inner wall of the mixing tank (2) through a bearing. A connecting plate (302) is fixedly connected at one end to the outer wall of the rotating rod (301), and the bottom of the connecting plate (302) is slidably connected to the bottom of the inner wall of the mixing tank (2). A toggle plate (303) is fixedly connected to the top of the connecting plate (302).
2. The butanol and butyl acetate azeotrope separation device according to claim 1, characterized in that: The actuating plate (303) is a square frame. The bottom of the actuating plate (303) is fixedly connected to the top of the connecting plate (302). A diversion groove (304) is provided on the inner wall of the actuating plate (303).
3. The butanol and butyl acetate azeotrope separation device according to claim 2, characterized in that: The inner wall of the diversion channel (304) is a square groove, and the outer wall of the fixing sleeve (305) is fixedly connected to the separation plate (306), which is a square plate structure.
4. The butanol and butyl acetate azeotrope separation device according to claim 3, characterized in that: A fixing block (307) is fixedly connected to one side of the separation plate (306), the fixing block (307) has a triangular cross-section, and a diversion plate (308) is fixedly connected to the other side of the separation plate (306).
5. The butanol and butyl acetate azeotrope separation device according to claim 4, characterized in that: The diverter plate (308) has a recessed groove (309) on one side, and the separation plates (306) are arranged in annular equidistant array on the outer wall of the fixed sleeve (305).
6. The butanol and butyl acetate azeotrope separation device according to claim 5, characterized in that: The outer wall of the connecting plate (302) is provided with a toggle mechanism (4), the toggle mechanism (4) includes a rotating shaft (401), the rotating shaft (401) is rotatably connected to the outer wall of the connecting plate (302).
7. The butanol and butyl acetate azeotrope separation device according to claim 6, characterized in that: The outer wall of the rotating shaft (401) is fixedly connected to the opening and closing plate (402), and the outer wall of the opening and closing plate (402) is fixedly connected to the first connecting block (403).
8. The butanol and butyl acetate azeotrope separation device according to claim 7, characterized in that: An elastic strip (404) is fixedly connected to the outer wall of the first connecting block (403), and a second connecting block (405) is fixedly connected to one end of the elastic strip (404). The second connecting block (405) is fixedly connected to the top of the connecting plate (302).