Distillation still and stirring device thereof

Abstract

The invention relates to the technical field of distillation kettles, in particular to a distillation kettle and a stirring device thereof. The stirring device comprises an inner cylinder, a rotating shaft and a scraping plate, the inner cylinder is vertically arranged, an upper half cavity and a lower half cavity are formed in the inner cylinder, and the upper half cavity is located above the lower half cavity; the rotating shaft is rotationally arranged on the inner cylinder; a first channel is formed in the rotating shaft and can be communicated with the upper half cavity and the lower half cavity; the scraping plate is slidably arranged on the rotating shaft in the radial direction of the rotating shaft, the scraping plate is located in the lower half cavity, a liquid outlet hole is formed in the scraping plate, and the first channel communicates with the lower half cavity through the liquid outlet hole. Through cooperative arrangement of a scraping plate and a rotating shaft, after the rotating shaft rotates, the scraping plate slides in the radial direction of the rotating shaft under the action of centrifugal force, a solution in a liquid outlet hole is discharged into a lower half cavity under the action of centrifugal force, at the moment, negative pressure is formed in a first channel, and a solution in an upper half cavity is sucked into the first channel and then discharged into the lower half cavity; exchange of solutions in the upper half cavity and the lower half cavity is realized, so that the solutions in the inner cylinder are mixed more sufficiently.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of distillation still, in particular to a distillation still and a stirring device thereof. BACKGROUND

[0002] In many industries such as chemical industry, pharmaceutical industry and food industry, distillation operation as a key separation and purification process, the core equipment distillation still plays a vital role. And the stirring device is indispensable to ensure the uniformity and efficiency of the distillation process.

[0003] Currently, the stirring device commonly used in industrial production mixes the solution by rotating, which has poor mixing effect for solutions of different heights, leading to difficulty in meeting the high efficient heat exchange demand when dealing with some materials sensitive to temperature change and requiring rapid heating or cooling, resulting in slow distillation process, low production efficiency, increased energy consumption and production cost. SUMMARY

[0004] Therefore, it is necessary to provide a distillation still and a stirring device thereof aiming at the poor mixing effect of the current stirring device.

[0005] The above-mentioned purpose is achieved by the following technical scheme: A stirring device, comprising an inner cylinder, a rotating shaft and a scraper, the inner cylinder is vertically arranged, the inner cylinder is provided with an upper half cavity and a lower half cavity, the upper half cavity is located above the lower half cavity; the rotating shaft is rotationally arranged on the inner cylinder, and the rotating shaft is coaxial with the inner cylinder; the rotating shaft is provided with a first channel, the first channel can communicate with the upper half cavity and the lower half cavity; the scraper is slidingly arranged on the rotating shaft along the radial direction of the rotating shaft, a first spring is arranged between the scraper and the rotating shaft, two ends of the first spring are connected with the rotating shaft and the scraper respectively, the scraper is located in the lower half cavity, and the scraper can contact the inner wall of the inner cylinder, the scraper is provided with a liquid outlet hole, and the first channel communicates with the lower half cavity through the liquid outlet hole.

[0006] Preferably, the circumferential surface of the rotating shaft is provided with an air inlet hole, the air inlet hole communicates with the first channel, and an air pump is arranged outside the inner cylinder, the air pump can inject high-pressure gas into the first channel through the air hole.

[0007] Preferably, the rotating shaft is provided with a plurality of through holes penetrating the rotating shaft along the radial direction of the rotating shaft, the plurality of through holes are arranged along the axial direction of the rotating shaft, and the plurality of through holes are located in the upper half cavity; the diameter of each through hole gradually decreases from the inner circumferential surface of the rotating shaft to the outer circumferential surface of the rotating shaft; each through hole is provided with a ball and a second spring, the ball is slidingly arranged in the through hole along 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 close to the axis of the rotating shaft and larger than the end of the through hole away from the axis of the rotating shaft.

[0008] Preferably, each scraper is provided with a cavity, and the cavity communicates with the liquid outlet hole and the first channel respectively.

[0009] Preferably, the stirring device further comprises a plurality of stirring rods, the plurality of stirring rods are sequentially fixed and installed on the rotating shaft in the vertical direction and are located in the upper half cavity, the number of stirring rods in each group of stirring rods is a plurality, and the plurality of stirring rods are uniformly distributed around the rotating shaft.

[0010] The distillation kettle comprises the stirring device and further comprises an outer cylinder and a convex ring, the outer cylinder is sleeved on the inner cylinder, a first cavity containing a heat exchange medium is arranged between the outer cylinder and the inner cylinder, the convex ring is fixedly installed on the inner wall of the inner cylinder and is coaxial with the inner cylinder, a groove is formed in 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, the groove is in communication with the first cavity, and the convex ring is located in the lower half cavity.

[0011] Preferably, a plurality of convex rings are fixedly installed on the inner wall of the inner cylinder in the vertical direction, a spacing is arranged between any two adjacent convex rings, the number of scrapers corresponds to the number of convex rings, the number of scrapers in each group is a plurality, the plurality of scrapers in the same group are uniformly distributed around the rotating shaft, each group of scrapers corresponds to a convex ring, and each group of scrapers is located below the corresponding convex ring, and the scrapers in the same group between any two adjacent convex rings can simultaneously contact the two convex rings that are close to each other.

[0012] Preferably, the distillation kettle further comprises a plurality of arc plates, the plurality of arc plates are sequentially arranged in the axial direction of the rotating shaft, the number of groups of arc plates is the same as and corresponds to the number of groups of scrapers; the number of arc plates in each group of arc plates is a plurality, each arc plate is fixedly installed on the rotating shaft, and 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; any two adjacent arc plates in the same group are spaced apart in the circumferential direction of the rotating shaft, the plurality of arc plates are uniformly distributed around the circumferential surface of the rotating shaft and can form a ring, and one arc plate in each group of arc plates is located between any two adjacent scrapers in the corresponding group of scrapers, and the arc plate and the adjacent scrapers are in sliding connection.

[0013] Preferably, the upper surface and the lower surface of each convex ring are inclined relative to the horizontal plane, the upper surface and the lower surface of the convex ring gradually approach from the side close to the inner cylinder to the side close to the rotating shaft, and the side of the arc plate in contact with the convex ring is parallel to the side of the convex ring in contact.

[0014] Preferably, the distillation kettle further comprises a sleeve, a top ring, a vertical rod and a driving part, the sleeve is sleeved on the rotating shaft and is in sliding connection with the rotating shaft in the axial direction of the rotating shaft, the top ring has a plurality of top rings, each top ring corresponds to a group of arc plates, each top ring is provided with an inclined surface at one end close to the corresponding group of arc plates, the inclined surface of the top ring gradually moves away from the corresponding arc plate from the side close to the rotating shaft to the side away from the rotating shaft, the top ring can abut against the arc plate through the inclined surface, the vertical rod is fixedly connected with the sleeve and the plurality of top rings, and the driving part is used to drive the sleeve to slide on the rotating shaft.

[0015] The beneficial effects of the present application are: through the cooperation of the scraper and the rotating shaft, the scraper slides along the radial direction of the rotating shaft under the centrifugal force after the rotating shaft rotates, the solution in the liquid outlet hole is discharged into the lower cavity under the centrifugal force, at this time, negative pressure is formed in the first channel, the solution in the upper cavity is sucked into the first channel, and then discharged into the lower cavity, realizing the exchange of the solutions in the upper cavity and the lower cavity, so that the solution in the inner cylinder is mixed more fully; the scraper can contact the inner cylinder wall in the lower cavity under the action of the centrifugal force, and can scrape and clean the impurities on the surface.

[0016] Further, the convex ring and the groove are arranged, and the convex ring extends into the inner cylinder, so that the indirect contact area of the solution in the inner cylinder and the heat exchange medium in the first cavity is increased without increasing the volume of the inner cylinder, the heat exchange medium in the groove can directly conduct heat to the solution at the central position in the inner cylinder, and the heat exchange efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A structure diagram of a stirring device provided for an embodiment of the present application is shown in the figure; Figure 2 A left view of a stirring device provided for an embodiment of the present application is shown in the figure; Figure 3 A Figure 2 sectional view in the direction of A-A; Figure 4 A Figure 3 enlarged view of D; Figure 5 A Figure 3 enlarged view of C; Figure 6 A Figure 2 sectional view in the direction of B-B.

[0018] Wherein: 100, inner cylinder; 101, outer cylinder; 102, convex ring; 103, rotating shaft; 104, feeding 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 hole; 204, containing cavity; 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 hole; 216, support; 217, through hole; 218, ball; 219, second spring. DETAILED DESCRIPTION

[0019] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0020] The numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and have no any order or technical meaning. And the "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0021] In the present application, unless otherwise explicitly specified and limited, the "on" or "under" of the first feature to the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the "over", "above" and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0022] As Figures 1 to 6As shown, the embodiment of the present application provides a stirring device, which comprises an inner cylinder 100, a rotating shaft 103 and a scraper 201. The inner cylinder 100 is vertically arranged. An upper portion of the inner cylinder 100 is provided with a feeding opening 104, and a lower portion of the inner cylinder 100 is provided with a discharging opening 105. A convex ring 102 divides an inner portion of the inner cylinder 100 into an upper cavity and a lower cavity. The rotating shaft 103 is rotatably arranged on the inner cylinder 100, and the rotating shaft 103 is coaxial with the inner cylinder 100. A top end of the rotating shaft 103 penetrates the inner cylinder 100. The inner cylinder 100 is provided with a motor 110. An output shaft of the motor 110 is coaxial with the rotating shaft 103, and the output shaft of the motor 110 is fixedly connected with the rotating shaft 103. The rotating shaft 103 is provided with a first channel 111. The first channel 111 is capable of communicating with the upper cavity and the lower cavity. The scraper 201 is slidably arranged on the rotating shaft 103 along a radial direction of the rotating shaft 103. The scraper 201 and the rotating shaft 103 are provided with a first spring 202. Two ends of the first spring 202 are respectively connected with the rotating shaft 103 and the scraper 201. The scraper 201 is located in the lower cavity, and the scraper 201 is capable of contacting with an 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 cavity through the liquid outlet hole 203. When the scraper 201 contacts with the inner wall of the inner cylinder 100, the liquid outlet hole 203 is located directly below the convex ring 102.

[0023] Through the cooperation of the scraper 201 and the rotating shaft 103, when the rotating shaft 103 rotates, the scraper 201 slides along the radial direction of the rotating shaft 103 under the centrifugal force. The solution in the liquid outlet hole 203 is discharged into the lower cavity under the centrifugal force. At this time, a negative pressure is formed in the first channel 111. The solution in the upper cavity is sucked into the first channel 111, and then is discharged into the lower cavity. The exchange of the solutions in the upper cavity and the lower cavity is realized. The solution in the inner cylinder 100 is mixed more fully. The scraper 201 is capable of contacting with the inner wall of the inner cylinder 100 in the lower cavity under the centrifugal force. The impurities on the surface of the inner wall can be scraped and cleaned.

[0024] In the embodiment, the rotating shaft 103 is provided with an air inlet hole 215. The air inlet hole 215 communicates with the first channel 111. An air pump is arranged outside the inner cylinder 100. The air pump is capable of injecting high-pressure gas into the first channel 111. A support 216 is arranged on a top portion of the inner cylinder 100. The motor 110 is mounted on the support 216. The support 216 is sleeved on the rotating shaft 103. The support 216 is rotatably connected with the rotating shaft 103. A ring groove is arranged on the support 216. The ring groove communicates with the air inlet hole 215. The air pump is capable of injecting gas into the ring groove. When the inner cylinder 100 needs to be cleaned, the air pump injects gas into the inner cylinder 100. The gas discharges the solution in the cavity 204 through the first channel 111. At the same time, the gas pressure in the first channel 111 increases. The scraper 201 is pushed to contact with the inner wall of the inner cylinder 100. The scraper 201 cleans the inner wall of the inner cylinder 100.

[0025] In the embodiment, the rotating shaft 103 is provided with a plurality of through holes 217 penetrating the rotating shaft 103 along the radial direction of the rotating shaft 103, the plurality of through holes 217 are arranged along the axial direction of the rotating shaft 103, the plurality of through holes 217 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 slidingly arranged in the through hole 217 along the radial direction of the rotating shaft 103, and the diameter of the ball 218 is smaller than the diameter of the end of the through hole 217 close to 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 the 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 hole 203 to clean the lower cavity and reduce energy waste.

[0026] In the embodiment, each scraper 201 is provided with a cavity 204, the cavity 204 is in communication with the liquid outlet hole 203 and the first channel 111 respectively, the circumferential surface of the rotating shaft 103 is provided with a plurality of guide columns 205, one end of each guide column 205 is fixedly installed on the rotating shaft 103, and the guide column 205 extends along the radial direction of the rotating shaft 103, each guide column 205 corresponds to a scraper 201, and each scraper 201 is sleeved on the corresponding guide column 205, the scraper 201 is slidingly connected with the guide column 205 along the length direction of the guide column 205, the end of the guide column 205 away from the rotating shaft 103 extends into the cavity 204, the first spring 202 is sleeved on the guide column 205, and the first spring 202 is located in the cavity 204, and the two ends of the first spring 202 are connected with the guide column 205 and the scraper 201 respectively. The middle part of each guide column 205 is provided with a through slot 206 penetrating the end surface thereof, the through slot 206 is in communication with the first channel 111, if the inner cylinder is filled with a solution, when the rotating shaft 103 rotates, the solution in the cavity 204 also has a large centrifugal force and is gathered to the position of the liquid outlet hole 203, after the solution is discharged from the cavity through the liquid outlet hole 203, a negative pressure is formed in the cavity, and the solution in the first channel 111 is sucked into the cavity 204 through the through slot 206.

[0027] In the embodiment, the stirring mechanism further includes a plurality of groups of stirring rods 214, the plurality of groups of stirring rods 214 are fixedly installed on the rotating shaft 103 in sequence along the vertical direction, and the plurality of groups of stirring rods 214 are located in the upper cavity, the number of stirring rods 214 in each group of stirring rods 214 is a plurality, and the plurality of stirring rods 214 are uniformly distributed around the rotating shaft 103, so that the solution in the upper cavity can be stirred to make the internal heat of the solution in the upper cavity uniform.

[0028] The distillation kettle comprises the stirring device, further comprises an outer cylinder 101 and a convex ring 102, the outer cylinder 101 is sleeved on the inner cylinder 100, and the first cavity 106 containing a heat exchange medium is arranged between the outer cylinder 101 and the inner cylinder 100, the first inlet 107 and the second inlet 108 are formed in the outer cylinder 101, the first inlet 107 is located below the second inlet 108, and the first inlet 107 and the second inlet 108 are in communication with the first cavity 106, and the first inlet 107 and the second inlet 108 are used for the flow of the heat exchange medium in the first cavity 106, the convex ring 102 is fixedly installed on the inner wall of the inner cylinder 100, the convex ring 102 is coaxial with the inner cylinder 100, the groove 109 is formed in 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 is in communication with the first cavity 106, and the convex ring is located in the lower half cavity.

[0029] The convex ring 102 and the groove 109 are arranged, the convex ring 102 extends into the inner cylinder 100, the indirect contact area between the solution in the inner cylinder 100 and the heat exchange medium in the first cavity 106 is increased without increasing the volume of the inner cylinder 100, the heat exchange medium in the groove 109 can directly conduct heat to the solution at the central position in the inner cylinder 100, and the heat exchange efficiency is improved, the movement of the scraper 201 causes the liquid outlet hole 203 to be close to the inner wall of the inner cylinder 100, the solution discharged from the liquid outlet hole 203 can discharge the solution at the position directly below the convex ring 102, and the heat exchange efficiency of the heat exchange medium and the solution is further improved.

[0030] In the embodiment, the plurality of convex rings 102 are fixedly installed on the inner wall of the inner cylinder 100 in the vertical direction, and a spacing is provided between two adjacent convex rings 102. The plurality of convex rings 102 can further increase the indirect contact area between the solution in the inner cylinder 100 and the heat exchange medium of the first cavity 106, thereby improving the heat exchange efficiency. The scraper 201 is provided in a number corresponding to the number of the convex rings 102. Each group of scrapers 201 has a plurality of scrapers 201, and the plurality of scrapers 201 in the same group are uniformly distributed around the rotation shaft 103. Each group of scrapers 201 corresponds to one convex ring 102, and each group of scrapers 201 is located below the corresponding convex ring 102. The scrapers 201 in the same group between two adjacent convex rings 102 can simultaneously contact the side of the two convex rings 102 that is close to each other. The group of scrapers 201 corresponding to the convex ring 102 closest to the inner bottom surface of the inner cylinder 100 is in sliding contact with the inner bottom surface of the inner cylinder 100. The position difficult to clean in the lower half cavity is cleaned by the scraper 201, thereby greatly reducing the residual dirt inside. In the embodiment, the distillation kettle further comprises a plurality of groups of arc plates 112. The plurality of groups of arc plates 112 are sequentially arranged in the axial direction of the rotation shaft 103. The number of groups of arc plates 112 is the same as and corresponds to the number of groups of scrapers 201. In each group of arc plates 112, the number of arc plates 112 is a plurality. Each arc plate 112 is fixedly installed on the rotation shaft 103, and 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, thereby reducing the distance between the solution and the heat exchange medium and effectively improving the heat exchange efficiency. Two adjacent arc plates 112 in the same group are spaced apart in the circumferential direction of the rotation shaft 103. The plurality of arc plates 112 are uniformly distributed around the rotation 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 in sliding connection. The center of each group of scrapers 201 in the vertical direction is located on the horizontal plane where the corresponding group of arc plates 112 is located. The arc plate 112 between two adjacent convex rings 102 can uniformly separate the two convex rings 102, so that the solution flowing near the two convex rings 102 can exchange heat with the heat exchange medium.

[0031] In the embodiment, the upper surface and the lower surface of each convex ring 102 are arranged to be inclined relative to the horizontal plane, the upper surface and the lower surface of the convex ring 102 gradually approach from the side close to the inner cylinder 100 to the side close to the rotating shaft 103, the side of the arc plate 112 in contact with the convex ring 102 is parallel to the side of the convex ring 102 in contact with the arc plate 112, the upper surface and the lower surface of the arc plate 112 between two adjacent convex rings 102 gradually approach from the side close to the rotating shaft 103 to the side away from the rotating shaft 103, when the side of the arc plate 112 away from the rotating shaft 103 is in contact with the inner wall of the inner cylinder 100, the upper surface of the arc plate 112 is in contact with the lower surface of the convex ring 102 above the arc plate 112, and the lower surface of the arc plate 112 is in contact with the upper surface of the convex ring 102 below the arc plate 112, so that the arc plate 112 can scrape and clean the position in contact with the arc plate 112, and meanwhile, the inclined surface of the convex ring 102 can facilitate the impurities scraped by the arc plate 112 to fall off the convex ring 102.

[0032] In the embodiment, the distillation kettle further comprises a sleeve 207, top rings 208, a vertical rod 209 and a driving part, the sleeve 207 is sleeved on the rotating shaft 103 and is in sliding connection with the rotating shaft 103 in the axial direction of the rotating shaft 103, the top rings 208 are provided in plurality, each top ring 208 corresponds to a group of arc plates 112, and each top ring 208 is provided with an inclined surface at one end close to the corresponding group of arc plates 112, the inclined surface of the top ring 208 gradually moves away from the corresponding arc plate 112 from the side close to the rotating shaft 103 to the side away from the rotating shaft 103, and the top ring 208 can abut against the arc plate 112 through the inclined surface thereof, each top ring 208 is located below the corresponding group of arc plates 112, and when the top ring 208 slides upward in the vertical direction of the rotating shaft 103, the top ring 208 can push the corresponding arc plate 112 to move in the radial direction of the rotating shaft 103 away from the rotating shaft 103 through the inclined surface thereof. The vertical rod 209 is in fixed connection with the sleeve 207 and the plurality of top rings 208 respectively, the vertical rod 209 penetrates through the arc plate 112 and is in sliding connection with the arc plate 112, and the driving part is used to drive the sleeve 207 to slide on the rotating shaft 103. The bottom of the inner cylinder 100 is provided with a base 210, the base 210 is fixedly installed on the bottom of the inner cylinder 100, the driving part comprises a telescopic rod 211 and a connecting sleeve 212, the telescopic rod 211 is vertically arranged on the base 210, the connecting sleeve 212 is fixedly installed on the end of the telescopic rod 211, the bottom end of the rotating shaft 103 penetrates through the inner cylinder 100 and is sleeved in the connecting sleeve 212, the rotating shaft 103 is in rotational connection with the connecting sleeve 212 and can be in sliding connection in the axial direction of the rotating shaft 103; the sleeve 207 penetrates through the inner cylinder 100 and is in rotational connection with the inner cylinder 100, the sleeve 207 is in sliding connection with the inner cylinder 100, the sleeve 207 is in rotational connection with the connecting sleeve 212, and the telescopic rod 211 can drive the sleeve 207 to slide in the axial direction of the rotating shaft 103 through the connecting sleeve 212.

[0033] The top and bottom of the inner cylinder 100 are provided with temperature sensors 213 (the temperature sensor 213 at the bottom of the inner cylinder 100 is not shown in the figure), and when the temperature difference detected by the two temperature sensors 213 exceeds a preset value, the telescopic rod 211 is started, so that the distance between the arc plate 112 and the rotating shaft 103 is increased, the centrifugal force on the solution in the cavity 204 is increased, and the exchange of the solution in the upper half cavity and the lower half cavity is accelerated.

[0034] Specifically, the inner cylinder 100 is provided with a gas outlet for discharging the gas generated in the distillation process.

[0035] The distillation kettle provided by the embodiment of the present application comprises the stirring device in any one of the above embodiments.

[0036] The working principle of the distillation kettle provided by the above embodiment is as follows: First, the solution to be distilled is added to the inner cylinder 100 through the charging port 104, then the heat exchange medium is introduced into the first cavity 106 through the first inlet 107, and the heat exchange medium is discharged from the second inlet 108 after filling the first cavity 106; then the motor 110 is started, the motor 110 drives the rotating shaft 103 to rotate, the rotating shaft 103 drives the stirring rod 214 and the scraper 201 to rotate, and the stirring rod 214 and the scraper 201 stir the solution in the inner cylinder 100.

[0037] The scraper 201 generates a centrifugal force away from the rotating shaft 103 while rotating around the rotating shaft 103, the scraper 201 slides on the corresponding guide column 205 and compresses the first spring 202, the solution in the cavity 204 converges to the liquid outlet hole 203, and then is discharged from the liquid outlet hole 203, at this time, the cavity 204 is in a negative pressure environment, the solution in the first channel 111 is sucked through the through groove 206, a negative pressure is formed in the first channel 111, the ball 218 in the through hole 217 compresses the second spring 219 and approaches the axis of the rotating shaft 103, the upper half cavity is communicated with the first channel 111, the solution in the upper half cavity enters the first channel 111 through the through hole 217, and then enters the cavity 204 through the through groove 206, and finally is discharged from the liquid outlet hole 203 to the lower half cavity, when the solution in the lower half cavity flows to the upper half cavity, it moves along the S-shaped path under the guidance of the arc plate 112, and is close to the convex ring 102, so that the heat exchange medium can fully exchange heat with the solution.

[0038] When the data difference detected by the two temperature sensors 213 exceeds the preset value, it indicates that the solution in the upper half cavity and the solution in the lower half cavity are not uniform in temperature, at this time, the telescopic rod 211 is started, the telescopic rod 211 is elongated to push the sleeve 207 to move 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 is close to the corresponding group of arc plates 112, and the corresponding group of arc plates 112 is further compressed by the first spring 202 through the slope of the top ring 208, the arc plate 112 is closer to the inner wall of the inner cylinder 100, the solution in the cavity 204 is subjected to a greater centrifugal force, and the solution is discharged from the liquid outlet hole 203 at a faster speed, so that the solution in the upper half cavity and the solution in the lower half cavity are exchanged faster, and the mixing efficiency of the solution is improved.

[0039] After the solution evaporates, the gas body is discharged from the gas outlet, after the solution distillation is completed, the discharge port 105 is opened, and the air pump is started, the air pump ventilates into the first channel 111 through the air inlet hole 215, at this time, the through hole 217 is blocked by the ball 218, the gas enters the cavity 204 through the through slot 206, and then is discharged from the liquid outlet hole 203 into the lower half cavity, the rotating shaft 103 continues to rotate, and the scraper 201 is in contact with the inner wall of the inner cylinder 100 and the corresponding convex ring 102 under the action of the pressure, the rotating scraper 201 scrapes and cleans the surface of the inner cylinder 100 and the surface of the convex ring 102 in contact, and the impurities after cleaning fall to the bottom of the inner cylinder 100 under the blowing of the gas and the guidance of the slope of the convex ring 102, and are discharged from the discharge port 105.

[0040] The technical features of the above embodiments can be combined arbitrarily, in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered that it is within the scope of the present application.

[0041] The above-described embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as limiting the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A stirring device, characterized in that The application relates to a stirring device. The stirring device comprises an inner cylinder, a rotating shaft and a scraper, the inner cylinder is vertically arranged, the inner cylinder is internally provided with an upper half cavity and a lower half cavity, the upper half cavity is located above the lower half cavity, the rotating shaft is rotationally arranged on the inner cylinder and coaxial with the inner cylinder, the rotating shaft is internally provided with a first channel, the first channel can be communicated with the upper half cavity and the lower half cavity, the scraper is slidingly arranged on the rotating shaft along the radial direction of the rotating shaft, a first spring is arranged between the scraper and the rotating shaft, two ends of the first spring are connected with the rotating shaft and the scraper respectively, the scraper is located in the lower half cavity and can be in contact with the inner wall of the inner cylinder, the scraper is provided with a liquid outlet hole, and the first channel is communicated with the lower half cavity through the liquid outlet hole.

2. A stirring device according to claim 1, characterized in that The circumferential surface of the rotating shaft is provided with an air inlet hole, the air inlet hole is communicated with the first channel, the outer portion of the inner cylinder is provided with an air pump, and the air pump can inject high-pressure gas into the first channel through the air hole.

3. A stirring device according to claim 2, wherein The rotating shaft is provided with a plurality of through holes penetrating the rotating shaft along the radial direction of the rotating shaft, the plurality of through holes are arranged along the axial direction of the rotating shaft, the plurality of through holes are located in the upper half cavity, the diameter of each through hole gradually decreases from the inner circumferential surface of the rotating shaft to the outer circumferential surface of the rotating shaft, each through hole is internally provided with a ball and a second spring, the ball is slidingly arranged in the through hole along 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 close to 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.

4. A stirring device according to claim 3, wherein Each scraper is internally provided with a cavity, and the cavity is communicated with the liquid outlet hole and the first channel respectively.

5. A stirring device according to claim 3, wherein The stirring device further comprises a plurality of stirring rods, the plurality of stirring rods are fixedly arranged on the rotating shaft in sequence along the vertical direction and located in the upper half cavity, the number of stirring rods in each group of stirring rods is multiple, and the multiple stirring rods are uniformly distributed around the rotating shaft.

6. A distillation still characterized by, The stirring device further comprises an outer cylinder and a convex ring, the outer cylinder is sleeved on the inner cylinder, a first cavity for containing a heat exchange medium is arranged between the outer cylinder and the inner cylinder, the convex ring is fixedly arranged on the inner wall of the inner cylinder and coaxial with the inner cylinder, a groove is formed in the outer circumferential surface of the convex ring and 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, the groove is communicated with the first cavity, and the convex ring is located in the lower half cavity.

7. A distillation still according to claim 6, wherein, The number of the convex rings is multiple, the plurality of convex rings are fixedly arranged on the inner wall of the inner cylinder along the vertical direction, a spacing is arranged between two adjacent convex rings, the number of groups of scrapers corresponds to the number of convex rings, the number of scrapers in each group is multiple, the multiple scrapers in the same group are uniformly distributed around the rotating shaft, each group of scrapers corresponds to a convex ring, and each group of scrapers is located below the corresponding convex ring, and the scrapers in the same group between two adjacent convex rings can simultaneously contact the side of the two convex rings close to each other.

8. A distillation still according to claim 7, wherein, The stirring device further comprises a plurality of arc plates, the plurality of arc plates are arranged in sequence along the axial direction of the rotating shaft, the number of groups of arc plates is the same as and corresponds to the number of groups of scrapers, the number of arc plates in each group of arc plates is multiple, each arc plate is fixedly arranged on the rotating shaft, and 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, a spacing is arranged between two adjacent arc plates in the same group in the circumferential direction of the rotating shaft, the plurality of arc plates are uniformly distributed around the circumferential surface of the rotating shaft and can form a ring, one arc plate in each group of arc plates is located between two adjacent scrapers in the corresponding group of scrapers, and the arc plate and the adjacent scrapers are slidingly connected.

9. A distillation still according to claim 8, wherein, The upper surface and the lower surface of each convex ring are arranged obliquely relative to a horizontal plane, and the upper surface and the lower surface of the convex ring gradually approach from a side close to the inner cylinder to a side close to the rotating shaft, and the side of the arc plate in contact with the convex ring is parallel to the side of the convex ring in contact therewith.

10. A distillation still according to claim 8, wherein, The sleeve is sleeved on the rotating shaft and is in sliding connection with the rotating shaft in the axial direction of the rotating shaft. The top ring is provided with a plurality of top rings, each of which corresponds to a group of arc plates. Each top ring is provided with an inclined surface close to one end of the corresponding group of arc plates. The inclined surface of the top ring gradually moves away from the corresponding arc plate from the side close to the rotating shaft to the side away from the rotating shaft. The top ring can abut against the arc plate through the inclined surface thereof. The vertical rod is fixedly connected with the sleeve and the plurality of top rings, respectively. The driving part is used to drive the sleeve to slide on the rotating shaft.

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