A distillation vessel and its stirring device

Abstract

This invention relates to the field of distillation kettle technology, and in particular to a distillation kettle and its stirring device. The stirring device includes an inner cylinder, a rotating shaft, and a scraper. The inner cylinder is vertically arranged and has an upper half-cavity and a lower half-cavity, with the upper half-cavity located above the lower half-cavity. The rotating shaft is rotatably mounted on the inner cylinder. The rotating shaft has a first channel that communicates with both the upper and lower half-cavities. The scraper is slidably mounted on the rotating shaft along its radial direction and is located in the lower half-cavity. The scraper has a liquid outlet hole, and the first channel communicates with the lower half-cavity through the liquid outlet hole. Through the coordinated arrangement of the scraper and the rotating shaft, when the rotating shaft rotates, the scraper is subjected to centrifugal force and slides along the radial direction of the rotating shaft. The solution in the liquid outlet hole is discharged into the lower half-cavity by centrifugal force. At this time, a negative pressure is formed in the first channel, drawing the solution in the upper half-cavity into the first channel and then discharging it into the lower half-cavity, thus realizing the exchange of solutions between the upper and lower half-cavities and making the solution in the inner cylinder more thoroughly mixed.

Description

Technical Field

[0001] This invention relates to the field of distillation kettle technology, and in particular to a distillation kettle and its stirring device. Background Technology

[0002] In many industries such as chemical, pharmaceutical, and food, distillation is a crucial separation and purification process, and its core equipment, the distillation vessel, plays a vital role. Furthermore, the stirring device is indispensable for ensuring the uniformity and efficiency of the distillation process.

[0003] Currently, the stirring devices commonly used in industrial production mix solutions by rotation. However, the mixing effect is poor for solutions at different heights. This makes it difficult to meet the high-efficiency heat exchange requirements when processing materials that are sensitive to temperature changes and require rapid heating or cooling. Consequently, the distillation process is slow, production efficiency is low, and energy consumption and production costs are increased. Summary of the Invention

[0004] Therefore, it is necessary to provide a distillation kettle and its stirring device to address the problem of poor mixing effect of current stirring devices.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A stirring device includes an inner cylinder, a rotating shaft, and a scraper. The inner cylinder is vertically arranged and has an upper cavity and a lower cavity, with the upper cavity located above the lower cavity. The rotating shaft is rotatably mounted on the inner cylinder and is coaxial with the inner cylinder. The rotating shaft has a first channel that communicates with both the upper and lower cavities. The scraper is slidably mounted on the rotating shaft along its radial direction. A first spring is provided between the scraper and the rotating shaft, with both ends of the first spring connected to the rotating shaft and the scraper, respectively. The scraper is located in the lower cavity and can contact the inner wall of the inner cylinder. The scraper has a liquid outlet hole, and the first channel communicates with the lower cavity through the liquid outlet hole.

[0007] Preferably, the circumferential surface of the rotating shaft is provided with an air inlet, which is connected to the first channel. An air pump is provided outside the inner cylinder, which can inject high-pressure gas into the first channel through the air inlet.

[0008] Preferably, the rotating shaft has multiple through holes extending through the shaft in the radial direction. The multiple through holes are arranged in the axial direction of the rotating shaft and are located in the upper cavity. The diameter of each through hole gradually decreases from the inner circumferential surface of the rotating shaft to the outer circumferential surface. Each through hole contains a ball and a second spring. The ball is slidably disposed in the through hole in the radial direction of the rotating shaft, and the diameter of the ball is smaller than the diameter of the end of the through hole near the axis of the rotating shaft and larger than the diameter of the end of the through hole away from the axis of the rotating shaft.

[0009] Preferably, each scraper has a cavity, which is connected to the liquid outlet and the first channel respectively.

[0010] Preferably, the stirring device further includes multiple sets of stirring rods, which are fixedly installed on the rotating shaft in a vertical direction and located in the upper cavity. Each set of stirring rods contains multiple stirring rods, which are evenly distributed around the rotating shaft.

[0011] A distillation vessel includes the stirring device described above, and further includes an outer cylinder and a convex ring. The outer cylinder is sleeved on the inner cylinder, and a first cavity for accommodating heat exchange medium is provided between the outer cylinder and the inner cylinder. The convex ring is fixedly installed on the inner wall of the inner cylinder, and the convex ring is coaxial with the inner cylinder. A groove is formed on the outer circumferential surface of the convex ring, the groove extends around the circumferential surface of the convex ring, the depth of the groove in the radial direction of the convex ring is greater than the wall thickness of the inner cylinder, and the groove communicates with the first cavity. The convex ring is located in the lower half cavity.

[0012] Preferably, there are multiple convex rings, which are fixedly installed on the inner wall of the inner cylinder in the vertical direction. There is a gap between two adjacent convex rings. The number of scrapers is in groups corresponding to the number of convex rings. There are multiple scrapers in each group. The multiple scrapers in the same group are evenly distributed around the axis of rotation. Each group of scrapers corresponds to one convex ring, and each group of scrapers is located below the corresponding convex ring. The scrapers in the same group between two adjacent convex rings can contact the sides of the two convex rings that are close to each other at the same time.

[0013] Preferably, the distillation vessel further includes multiple sets of arc plates, which are arranged sequentially along the axial direction of the rotating shaft. The number of sets of arc plates is the same as the number of sets of scrapers and corresponds one-to-one. Each set of arc plates contains multiple arc plates, each of which is fixedly installed on the rotating shaft. The outer arc surface of each arc plate is closer to the inner wall of the inner cylinder than the inner circumferential surface of the convex ring. Two adjacent arc plates in the same set are spaced apart in the circumferential direction of the rotating shaft. Multiple arc plates are evenly distributed around the circumference of the rotating shaft and can form a ring. One arc plate in each set of arc plates is located between two adjacent scrapers in the corresponding set of scrapers, and the arc plate and the adjacent scraper are slidably connected.

[0014] Preferably, the upper and lower surfaces of each convex ring are inclined relative to the horizontal plane, and the upper and lower surfaces of the convex ring gradually approach each other from the side closer to the inner cylinder to the side closer to the rotating shaft, and the side of the scraper that contacts the convex ring is parallel to the side of the convex ring it contacts.

[0015] Preferably, the distillation vessel further includes a sleeve, a top ring, a vertical rod, and a drive unit. The sleeve is sleeved on the rotating shaft and is slidably connected to the rotating shaft along the axial direction. Multiple top rings are provided, each top ring corresponding to a set of scrapers. Each top ring has an inclined surface at one end near the corresponding set of scrapers. The inclined surface of the top ring gradually moves away from the corresponding scraper from the side near the rotating shaft to the side away from the rotating shaft. The top ring can abut against the scraper through its own inclined surface. The vertical rod is fixedly connected to the sleeve and multiple top rings respectively. The drive unit is used to drive the sleeve to slide on the rotating shaft.

[0016] The beneficial effects of this invention are as follows: through the coordinated arrangement of the scraper and the rotating shaft, after the rotating shaft rotates, the scraper will slide along the radial direction of the rotating shaft under the centrifugal force, and the solution in the outlet hole will be discharged into the lower half-cavity under the centrifugal force. At this time, a negative pressure will be formed in the first channel, which will draw the solution in the upper half-cavity into the first channel and then discharge it into the lower half-cavity, thereby realizing the exchange of solutions in the upper and lower half-cavities and making the solution in the inner cylinder more thoroughly mixed; the scraper can contact the inner cylinder wall located in the lower half-cavity under the action of centrifugal force, and can scrape and clean the impurities on its surface.

[0017] Furthermore, a convex ring and a groove are provided, with the convex ring extending into the inner cylinder. This increases the indirect contact area between the solution in the inner cylinder and the heat exchange medium in the first cavity without increasing the volume of the inner cylinder. The heat exchange medium entering the groove can directly conduct heat to the solution at the center of the inner cylinder, thus improving the heat exchange efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a stirring device provided in an embodiment of the present invention;

[0019] Figure 2 A left view of a stirring device provided in an embodiment of the present invention;

[0020] Figure 3 for Figure 2 Sectional view along the middle AA direction;

[0021] Figure 4 for Figure 3 Enlarged view at point D;

[0022] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0023] Figure 6 for Figure 2 Sectional view along the BB direction.

[0024] in:

[0025] 100. Inner cylinder; 101. Outer cylinder; 102. Convex ring; 103. Rotating shaft; 104. Feed port; 105. Discharge port; 106. First cavity; 107. First inlet; 108. Second inlet; 109. Groove; 110. Motor; 111. First channel; 112. Arc plate; 201. Scraper; 202. First spring; 203. Liquid outlet; 204. Container; 205. Guide column; 206. Through groove; 207. Sleeve; 208. Top ring; 209. Vertical rod; 210. Base; 211. Telescopic rod; 212. Connecting sleeve; 213. Temperature sensor; 214. Stirring rod; 215. Air inlet; 216. Support; 217. Through hole; 218. Sphere; 219. Second spring. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0027] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They 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, and therefore should not be construed as limiting the invention.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] like Figures 1 to 6As shown, this embodiment of the invention provides a stirring device, including an inner cylinder 100, a rotating shaft 103, and a scraper 201. The inner cylinder 100 is vertically arranged, with a feeding port 104 at the top and a discharge port 105 at the bottom. A convex ring 102 divides the interior of the inner cylinder 100 into an upper cavity and a lower cavity. The rotating shaft 103 is rotatably mounted on the inner cylinder 100 and is coaxial with the inner cylinder 100. The top end of the rotating shaft 103 passes through the inner cylinder 100. A motor 110 is mounted on the inner cylinder 100, with the output shaft of the motor 110 coaxial with the rotating shaft 103 and fixedly connected to it. A first channel is provided inside the rotating shaft 103. 111, the first channel 111 can communicate with the upper half cavity and the lower half cavity; the scraper 201 is slidably disposed on the rotating shaft 103 along the radial direction of the rotating shaft 103, and a first spring 202 is provided between the scraper 201 and the rotating shaft 103. The two ends of the first spring 202 are respectively connected to the rotating shaft 103 and the scraper 201. The scraper 201 is located in the lower half cavity, and the scraper 201 can contact the inner wall of the inner cylinder 100 and the convex ring 102. The scraper 201 is provided with a liquid outlet hole 203. The first channel 111 communicates with the lower half cavity through the liquid outlet hole 203, and when the scraper 201 contacts the inner wall of the inner cylinder 100, the liquid outlet hole 203 is located directly below the convex ring 102.

[0030] With the cooperation of scraper 201 and rotating shaft 103, after rotating shaft 103 rotates, scraper 201 will slide in the radial direction of rotating shaft 103 under centrifugal force. The solution in the liquid outlet 203 will be discharged into the lower half cavity under centrifugal force. At this time, a negative pressure will be formed in the first channel 111, which will draw the solution in the upper half cavity into the first channel 111 and then discharge it into the lower half cavity, realizing the exchange of solutions in the upper half cavity and the lower half cavity, so that the solution in the inner cylinder 100 is more thoroughly mixed. Under the action of centrifugal force, scraper 201 can contact the wall of inner cylinder 100 located in the lower half cavity, and can scrape and clean the impurities on its surface.

[0031] In this embodiment, the circumferential surface of the rotating shaft 103 is provided with an air inlet 215, which is connected to the first channel 111. An air pump is provided outside the inner cylinder 100, which can inject high-pressure gas into the first channel 111 through the air inlet 215. A bracket 216 is provided at the top of the inner cylinder 100, and the motor 110 is mounted on the bracket 216. The bracket 216 is sleeved on the rotating shaft 103 and is rotatably connected to the rotating shaft 103. An annular groove is provided on the bracket 216, which is connected to the air inlet 215. The air pump can introduce gas into the groove. When it is necessary to clean the inner cylinder 100, gas is injected into the inner cylinder 100 through the air pump. The gas passes through the first channel 111 and discharges the solution in the cavity 204. At the same time, the gas pressure in the first channel 111 increases, which pushes the scraper 201 to contact the inner wall of the inner cylinder 100, so that the scraper 201 cleans the inner wall of the inner cylinder 100.

[0032] In this embodiment, the rotating shaft 103 is provided with multiple through holes 217 extending through the rotating shaft 103 in the radial direction. The multiple through holes 217 are arranged in the axial direction of the rotating shaft 103 and are located in the upper cavity. The diameter of each through hole 217 gradually decreases from the inner circumferential surface of the rotating shaft 103 to the outer circumferential surface of the rotating shaft 103. Each through hole 217 is provided with a ball 218 and a second spring 219. The ball 218 is slidably disposed in the through hole 217 in the radial direction of the rotating shaft 103. The diameter of the ball 218 is smaller than the diameter of the end of the through hole 217 near the axis of the rotating shaft 103 and larger than the diameter of the end of the through hole 217 away from the axis of the rotating shaft 103. After gas is introduced into the first channel 111, the pressure in the first channel 111 increases. The ball 218 blocks the corresponding through hole 217, and the gas can be better discharged from the liquid outlet 203 to clean the lower cavity and reduce energy waste.

[0033] In this embodiment, each scraper 201 has a cavity 204, which is connected to the liquid outlet 203 and the first channel 111. A plurality of guide posts 205 are provided on the circumferential surface of the rotating shaft 103. One end of each guide post 205 is fixedly installed on the rotating shaft 103 and extends along the radial direction of the rotating shaft 103. Each guide post 205 corresponds to a scraper 201, and each scraper 201 is sleeved on the corresponding guide post 205. The scraper 201 is slidably connected to the guide post 205 along the length direction of the guide post 205. The end of the guide post 205 away from the rotating shaft 103 extends into the cavity 204. A first spring 202 is sleeved on the guide post 205 and is located in the cavity 204. The two ends of the first spring 202 are connected to the guide post 205 and the scraper 201, respectively. Each guide post 205 has a through groove 206 extending through its end face in the middle. The through groove 206 is connected to the first channel 111. If the inner cylinder is filled with solution, when the rotating shaft 103 rotates, the solution in the cavity 204 also has a large centrifugal force and gathers towards the outlet hole 203. After the solution is discharged from the outlet hole 203, a negative pressure will be formed in the cavity, and the solution in the first channel 111 will be sucked into the cavity 204 through the through groove 206.

[0034] In this embodiment, the stirring mechanism also includes multiple sets of stirring rods 214. The multiple sets of stirring rods 214 are fixedly installed on the rotating shaft 103 in a vertical direction, and the multiple sets of stirring rods 214 are located in the upper cavity. Each set of stirring rods 214 contains multiple stirring rods 214. The multiple stirring rods 214 are evenly distributed around the rotating shaft 103, which can stir the solution in the upper cavity, so that the heat inside the solution in the upper cavity is uniform.

[0035] A distillation vessel includes the aforementioned stirring device, and further includes an outer cylinder 101 and a convex ring 102. The outer cylinder 101 is sleeved on an inner cylinder 100, and a first cavity 106 for accommodating a heat exchange medium is provided between the outer cylinder 101 and the inner cylinder 100. A first inlet 107 and a second inlet 108 are provided on the outer cylinder 101. The first inlet 107 is located below the second inlet 108, and both the first inlet 107 and the second inlet 108 communicate with the first cavity 106. 107 and the second inlet 108 are used for the flow of heat exchange medium in the first cavity 106; the convex ring 102 is fixedly installed on the inner wall of the inner cylinder 100, and the convex ring 102 is coaxial with the inner cylinder 100. A groove 109 is provided on the outer circumferential surface of the convex ring 102. The groove 109 extends around the circumferential surface of the convex ring 102. The depth of the groove 109 in the radial direction of the convex ring 102 is greater than the wall thickness of the inner cylinder 100. The groove 109 communicates with the first cavity 106. The convex ring is located in the lower half cavity.

[0036] The protruding ring 102 and the groove 109 are provided. The protruding ring 102 extends into the inner cylinder 100, which increases the indirect contact area between the solution in the inner cylinder 100 and the heat exchange medium in the first cavity 106 without increasing the volume of the inner cylinder 100. The heat exchange medium entering the groove 109 can directly conduct heat to the solution at the center of the inner cylinder 100, thus improving the heat exchange efficiency. The movement of the scraper 201 causes the liquid outlet 203 to move closer to the inner wall of the inner cylinder 100. The solution discharged from the liquid outlet 203 will discharge the solution directly below the protruding ring 102, further enhancing the heat exchange efficiency between the heat exchange medium and the solution.

[0037] In this embodiment, multiple convex rings 102 are provided, and the multiple convex rings 102 are fixedly installed on the inner wall of the inner cylinder 100 in the vertical direction. There is a gap between two adjacent convex rings 102. The multiple convex rings 102 can further increase the indirect contact area between the solution in the inner cylinder 100 and the heat exchange medium in the first cavity 106, thereby improving the heat exchange efficiency. The scraper 201 is provided with a number of groups corresponding to the number of convex rings 102. Each group has multiple scraper 201s, and the multiple scraper 201s in the same group are arranged around the circumference of the rotating shaft 103. The scrapers are evenly distributed, with each set of scrapers 201 corresponding to a convex ring 102. Each set of scrapers 201 is located below the corresponding convex ring 102. The scrapers 201 in the same set between two adjacent convex rings 102 can simultaneously contact the sides of the two convex rings 102 that are close to each other. The set of scrapers 201 corresponding to the convex ring 102 that is closest to the inner bottom surface of the inner cylinder 100 slides in contact with the inner bottom surface of the inner cylinder 100. The areas in the lower cavity that are difficult to clean are cleaned by the scrapers 201, which greatly reduces the residual dirt inside.

[0038] In this embodiment, the distillation vessel also includes multiple sets of arc plates 112, which are arranged sequentially along the axial direction of the rotating shaft 103. The number of sets of arc plates 112 is the same as the number of sets of scrapers 201 and corresponds one-to-one. Each set of arc plates 112 contains multiple arc plates 112, each of which is fixedly installed on the rotating shaft 103. The outer arc surface of each arc plate 112 is closer to the inner wall of the inner cylinder 100 than the inner circumferential surface of the convex ring 102. Most of the solution below the arc plate 112 will move along an S-shaped path under the action of the arc plate 112 when flowing upward, reducing the distance between it and the heat exchange medium and effectively improving the heat exchange efficiency during the flow process. Two adjacent arc plates 112 are spaced apart in the circumferential direction of the rotating shaft 103. Multiple arc plates 112 are evenly distributed around the circumference of the rotating shaft 103 and can form a ring. One arc plate 112 in each group of arc plates 112 is located between two adjacent scrapers 201 in the corresponding group of scrapers 201, and the arc plate 112 and the adjacent scraper 201 are slidably connected. The center of each group of scrapers 201 in the vertical direction is located on the horizontal plane of the corresponding group of arc plates 112. The arc plate 112 located between two adjacent convex rings 102 can evenly separate the two convex rings 102, so that the solution can exchange heat with the heat exchange medium when flowing near the two convex rings 102.

[0039] In this embodiment, the upper and lower surfaces of each convex ring 102 are inclined relative to the horizontal plane. The upper and lower surfaces of the convex ring 102 gradually approach each other from the side near the inner cylinder 100 to the side near the rotating shaft 103. The side of the scraper 201 that contacts the convex ring 102 is parallel to the side of the convex ring 102 it contacts. The upper and lower surfaces of the scraper 201 located between two adjacent convex rings 102 gradually approach each other from the side near the rotating shaft 103 to the side away from the rotating shaft 103. When the side of the scraper 201 away from the rotating shaft 103 contacts the inner wall of the inner cylinder 100, the upper surface of the scraper 201 contacts the lower surface of the convex ring 102 above it, and the lower surface of the scraper 201 contacts the upper surface of the convex ring 102 below it. The scraper 201 can scrape and clean the contact area. At the same time, the inclined surface of the convex ring 102 makes it easier for the impurities scraped off by the scraper 201 to fall off the convex ring 102.

[0040] In this embodiment, the distillation vessel further includes a sleeve 207, a top ring 208, a vertical rod 209, and a driving unit. The sleeve 207 is sleeved on the rotating shaft 103 and is slidably connected to the rotating shaft 103 along the axial direction of the rotating shaft 103. Multiple top rings 208 are provided, each top ring 208 corresponding to a set of scrapers 201. Each top ring 208 has an inclined surface at one end near the corresponding set of scrapers 201. The inclined surface of the top ring 208 gradually moves away from the corresponding scraper 201 from the side near the rotating shaft 103 to the side away from the rotating shaft 103. The top ring 208 can abut against the scraper 201 through its own inclined surface. Each top ring 208 is located below the corresponding set of scrapers 201. When the top ring 208 slides upward along the vertical direction of the rotating shaft 103, the top ring 208 can push the corresponding scraper 201 to move away from the rotating shaft 103 along the radial direction of the rotating shaft 103 through its inclined surface. The vertical rod 209 is fixedly connected to the sleeve 207 and multiple top rings 208 respectively. The vertical rod 209 passes through the arc plate 112 and is slidably connected to the arc plate 112. The driving part is used to drive the sleeve 207 to slide on the rotating shaft 103. A base 210 is provided at the bottom of the inner cylinder 100. The base 210 is fixedly installed at the bottom of the inner cylinder 100. The driving part includes a telescopic rod 211 and a connecting sleeve 212. The telescopic rod 211 is vertically installed on the base 210. The connecting sleeve 212 is fixedly installed at the end of the telescopic rod 211. The bottom end of the rotating shaft 103 passes through the inner cylinder 100 and is sleeved in the connecting sleeve 212. The rotating shaft 103 and the connecting sleeve 212 are rotatably connected and can be slidably connected along the axial direction of the rotating shaft 103. The sleeve 207 passes through the inner cylinder 100 and is rotatably connected to the inner cylinder 100. The sleeve 207 and the connecting sleeve 212 are rotatably connected. The extension and retraction of the telescopic rod 211 can drive the sleeve 207 to slide along the axial direction of the rotating shaft 103 through the connecting sleeve 212.

[0041] Temperature sensors 213 are provided at the top and bottom of the inner cylinder 100 (the temperature sensor 213 at the bottom of the inner cylinder 100 is not shown in the figure). When the temperature difference detected by the two temperature sensors 213 exceeds the preset value, the telescopic rod 211 will be activated, thereby increasing the distance between the arc plate 112 and the rotating shaft 103, which increases the centrifugal force on the solution in the cavity 204 and accelerates the exchange of solutions in the upper and lower cavities.

[0042] Specifically, the inner cylinder 100 is equipped with a gas outlet for discharging the gas generated during the distillation process.

[0043] An embodiment of the present invention provides a distillation vessel, including a stirring device as described in the above embodiment.

[0044] The working principle of the distillation vessel provided in the above embodiments is as follows:

[0045] First, the solution to be distilled is added into the inner cylinder 100 through the feed port 104. Then, the heat exchange medium is introduced into the first cavity 106 through the first inlet 107. After the heat exchange medium fills the first cavity 106, it is discharged from the second inlet 108. Then, the motor 110 is started, which drives the rotating shaft 103 to rotate. The rotation of the rotating shaft 103 drives the stirring rod 214 and the scraper 201 to rotate. The stirring rod 214 and the scraper 201 stir the solution in the inner cylinder 100.

[0046] As the scraper 201 rotates around the shaft 103, it generates a centrifugal force away from the shaft 103. The scraper 201 slides on the corresponding guide post 205 and compresses the first spring 202. The solution in the cavity 204 converges towards the outlet hole 203 and is then discharged from the outlet hole 203. At this time, the cavity 204 is in a negative pressure environment. The solution in the first channel 111 is drawn through the through groove 206, and a negative pressure is formed in the first channel 111. The ball 218 in the through hole 217 is compressed. The second spring 219 moves closer to the axis of the rotating shaft 103. The upper half of the cavity is connected to the first channel 111. The solution in the upper half of the cavity enters the first channel 111 through the through hole 217, and then enters the cavity 204 through the through groove 206. Finally, it is discharged into the lower half of the cavity from the liquid outlet hole 203. When the solution in the lower half of the cavity flows into the upper half of the cavity, it will move along the S-shaped path under the guidance of the arc plate 112, and get close enough to the convex ring 102, so that the heat exchange medium can fully exchange heat with the solution.

[0047] When the difference in data detected by the two temperature sensors 213 exceeds the preset value, it indicates that the temperature of the solution in the upper half cavity and the solution in the lower half cavity are not uniform. At this time, the telescopic rod 211 is activated. The telescopic rod 211 extends and pushes the sleeve 207 upward along the rotating shaft 103 through the connecting sleeve 212. The sleeve 207 drives the top ring 208 to move through the vertical rod 209. The top ring 208 moves closer to the corresponding set of scrapers 201 and pushes the corresponding set of scrapers 201 through its own inclined surface to further compress the first spring 202. The scrapers 201 are closer to the inner wall of the inner cylinder 100, and the solution in the cavity 204 experiences greater centrifugal force and is discharged from the outlet hole 203 at a faster speed. Ultimately, the solution in the upper half cavity and the lower half cavity are exchanged faster, improving the mixing efficiency of the solution.

[0048] After the solution evaporates, the gas is discharged from the outlet. After the solution distillation is completed, the discharge port 105 is opened and the air pump is started. The air pump introduces air into the first channel 111 through the air inlet 215. At this time, the through hole 217 is blocked by the ball 218. The gas enters the cavity 204 through the through groove 206 and then is discharged into the lower half cavity through the liquid outlet 203. The rotating shaft 103 continues to rotate. Under the action of pressure, the scraper 201 contacts the inner wall of the inner cylinder 100 and the corresponding convex ring 102 respectively. The rotating scraper 201 scrapes and cleans the surface of the inner cylinder 100 and the surface of the convex ring 102. The cleaned impurities fall to the bottom of the inner cylinder 100 under the blowing of the gas and the guidance of the inclined surface of the convex ring 102, and then are discharged from the discharge port 105. The inner wall of the upper half cavity is smooth and neat, and can be cleaned with simple cleaning tools.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A distillation vessel, characterized in that, include: The device includes a stirring device, an outer cylinder, a convex ring, and multiple sets of arc plates. The stirring device comprises an inner cylinder, a rotating shaft, and a scraper. The inner cylinder is vertically arranged and has an upper half-cavity and a lower half-cavity, with the upper half-cavity located above the lower half-cavity. The rotating shaft is rotatably mounted on the inner cylinder and is coaxial with the inner cylinder. The rotating shaft has a first channel that communicates with both the upper and lower half-cavities. The scraper is slidably mounted on the rotating shaft along its radial direction. A first spring is provided between the scraper and the rotating shaft, with both ends of the first spring connected to the rotating shaft and the scraper, respectively. The scraper is located in the lower half-cavity and can contact the inner wall of the inner cylinder. The scraper has a liquid outlet hole, and the first channel communicates with the lower half-cavity through the liquid outlet hole. The outer cylinder is fitted onto the inner cylinder, and a first cavity for accommodating the heat exchange medium is provided between the outer cylinder and the inner cylinder; the convex ring is fixedly installed on the inner wall of the inner cylinder, and the convex ring is coaxial with the inner cylinder. A groove is provided on the outer circumferential surface of the convex ring, the groove extends around the circumferential surface of the convex ring, the depth of the groove in the radial direction of the convex ring is greater than the wall thickness of the inner cylinder, and the groove communicates with the first cavity. The convex ring is located in the lower half cavity. Multiple convex rings are provided, and multiple convex rings are fixedly installed on the inner wall of the inner cylinder in the vertical direction. There is a gap between two adjacent convex rings. The number of scraper sets corresponds to the number of convex rings. There are multiple scraper sets in each set. The multiple scraper sets in the same set are evenly distributed around the circumference of the rotating shaft. Each set of scraper sets corresponds to one convex ring, and each set of scraper sets is located below the corresponding convex ring. The scraper sets in the same set between two adjacent convex rings can simultaneously contact the sides of the two convex rings that are close to each other. Multiple sets of arc plates are arranged sequentially along the axial direction of the rotating shaft. The number of sets of arc plates is the same as the number of sets of scrapers and they correspond one-to-one. Each set of arc plates contains multiple arc plates, each of which is fixedly installed on the rotating shaft. The outer arc surface of each arc plate is closer to the inner wall of the inner cylinder than the inner circumferential surface of the convex ring. Two adjacent arc plates in the same set are spaced apart in the circumferential direction of the rotating shaft. Multiple arc plates are evenly distributed around the circumference of the rotating shaft and can form a ring. One arc plate in each set is located between two adjacent scrapers in the corresponding set of scrapers, and the arc plate and the adjacent scraper are slidably connected. The upper and lower surfaces of each convex ring are inclined relative to the horizontal plane. The upper and lower surfaces of the convex ring gradually approach each other from the side closer to the inner cylinder to the side closer to the rotating shaft. The side of the scraper that contacts the convex ring is parallel to the side of the convex ring it contacts.

2. The distillation vessel according to claim 1, characterized in that, The circumference of the rotating shaft is provided with an air inlet, which is connected to the first channel. An air pump is provided outside the inner cylinder, which can inject high-pressure gas into the first channel through the air inlet.

3. A distillation vessel according to claim 1, characterized in that, The rotating shaft has multiple through holes that penetrate the shaft radially. The through holes are arranged axially and are located in the upper cavity. The diameter of each through hole gradually decreases from the inner circumference of the rotating shaft to the outer circumference. Each through hole contains a ball and a second spring. The ball slides within the through hole radially. The diameter of the ball is smaller than the diameter of the through hole at the end closest to the axis of the rotating shaft and larger than the diameter of the through hole at the end furthest from the axis of the rotating shaft.

4. A distillation vessel according to claim 1, characterized in that, Each scraper has a cavity, which is connected to the liquid outlet and the first channel.

5. A distillation vessel according to claim 1, characterized in that, The stirring device also includes multiple sets of stirring rods, which are fixedly installed on the rotating shaft in a vertical direction. The multiple sets of stirring rods are located in the upper cavity, and each set of stirring rods contains multiple stirring rods, which are evenly distributed around the rotating shaft.

6. The distillation vessel according to claim 1 further includes a sleeve, a top ring, a vertical rod, and a driving unit. The sleeve is sleeved on the rotating shaft and is slidably connected to the rotating shaft along the axial direction of the rotating shaft. Multiple top rings are provided, each top ring corresponding to a set of scrapers. Each top ring has an inclined surface at one end near the corresponding set of scrapers. The inclined surface of the top ring gradually moves away from the corresponding scraper from the side near the rotating shaft to the side away from the rotating shaft. The top ring can abut against the scraper through its own inclined surface. The vertical rod is fixedly connected to the sleeve and multiple top rings respectively. The driving unit is used to drive the sleeve to slide on the rotating shaft.

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