Vacuum distillation device for hydrogen peroxide p-menthane production

Abstract

The application provides a vacuum distillation device for hydrogen peroxide p-menthane production, and belongs to the technical field of vacuum distillation towers. The device comprises a distillation kettle, a kettle cover fixedly connected to the top end of the distillation kettle through a lock buckle, a feed pipe fixedly connected to the outer wall of the distillation kettle, a connecting cylinder fixedly connected to the top end of the kettle cover, first avoiding grooves symmetrically formed in the outer wall of the connecting cylinder, a manhole, a water inlet pipe, a vacuum pipe and a tower body fixedly connected to the outer wall of the kettle cover close to the connecting cylinder, a limiting groove formed in the inner wall of the distillation kettle close to the top end, a drain pipe installed at the bottom end of the distillation kettle, a heating layer arranged at the bottom end of the distillation kettle, and a support frame fixedly connected to the outer wall of the middle part of the distillation kettle through screws. The cleaning assembly is used for cleaning the inner wall of the distillation kettle and is connected to the distillation kettle and the connecting cylinder. The cleaning assembly can scrape off the stains attached to the inner wall of the distillation kettle due to explosive boiling and sputtering, thereby avoiding the trouble of secondary cleaning.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of vacuum distillation towers, in particular to a vacuum distillation device for hydrogen peroxide p-menthane production. BACKGROUND

[0002] The vacuum distillation device is a necessary equipment in the production process of hydrogen peroxide p-menthane (PMHP), which is a special system capable of separating, purifying and refining PMHP from a reaction mixture under a negative pressure environment lower than the standard atmospheric pressure. The core function of the vacuum distillation device is to reduce the boiling point of PMHP by using a vacuum environment, so that the by-products such as p-menthanediol and p-cymene are removed efficiently, and the target product with high purity is obtained under the premise of avoiding the safety risks such as decomposition and explosion caused by high temperature.

[0003] For example, the Chinese patent with the publication number CN216366668U discloses a vacuum distillation tower for hydrogen peroxide p-menthane production, which comprises a reaction kettle and a tower body. The tower body is fixedly installed at the top end of the reaction kettle. The left end surface of the reaction kettle is provided with a feeding pipe and an air inlet pipe. The right end surface of the reaction kettle is provided with a discharging pipe at the bottom. The top end of the tower body is provided with an air outlet pipe. The left end surface of the tower body is provided with a reflux pipe. The left end surface of the tower body is provided with a water spraying pipe at the top.

[0004] Although the above-mentioned patent can clean the residues in the tower body and avoid affecting the production of subsequent products, the flushing of the water spraying pipe cannot thoroughly clean the inner wall of the tower body, especially during the heating process. If the local heating is uneven, local boiling can be easily caused, and the splashed materials can be attached to the inner wall of the tower body. After continuous heating, the materials can form solid waste and be firmly attached to the inner wall, which cannot be cleaned by the water spraying pipe, thereby increasing the trouble of secondary cleaning. Therefore, the application provides a vacuum distillation device for hydrogen peroxide p-menthane production to meet the needs. SUMMARY

[0005] The technical problem to be solved by the application is to provide a vacuum distillation device for hydrogen peroxide p-menthane production. By arranging the cleaning assembly, the stains attached to the inner wall of the distillation kettle due to boiling and splashing can be scraped off, thereby avoiding the trouble of secondary cleaning. In addition, the rate of the vapor entering the tower body during the distillation process can be controlled, so that the uncooled vapor does not overflow due to the overload of the cooling unit, and air pollution is avoided. The problem of secondary cleaning due to incomplete flushing is solved.

[0006] To solve the above technical problems, the application provides the following technical scheme:

[0007] The utility model provides a vacuum distillation device for hydrogen peroxide pair monene production, including distillation kettle, the top of distillation kettle is fixedly connected with kettle cover through the lock catch, the outer wall of distillation kettle is fixedly connected with feed pipe, the top of kettle cover is fixedly connected with connecting cylinder, the outer wall of connecting cylinder is opened the first avoiding slot symmetry, the outer wall of kettle cover near connecting cylinder is fixedly connected with manhole, water inlet pipe, vacuum pipe and tower body, the inner wall of distillation kettle near top is opened and is limited groove, the bottom of distillation kettle is installed with drain pipe, the bottom of distillation kettle is provided with heating layer, the middle outer wall of distillation kettle is fixedly connected with support frame through screw, cleaning subassembly, the cleaning subassembly is used for cleaning the inner wall of distillation kettle, the cleaning subassembly is connected with distillation kettle and connecting cylinder respectively.

[0008] Optionally, the cleaning assembly comprises a motor fixedly connected to the top end of the connecting cylinder, and a first fixed circular plate slidingly connected to the inner wall of the first avoiding slot, the bottom end of the motor is provided with a threaded rotating shaft, and the middle outer wall of the first fixed circular plate is provided with a second avoiding slot.

[0009] Optionally, the bottom end of the threaded rotating shaft is fixedly connected with a rotating plate, the outer wall of the rotating plate is provided with a plurality of first sliding holes arranged in a circumferential array, the outer wall of the threaded rotating shaft is screwed with a nut, and the bottom end of the nut is fixedly connected with a first rotating protrusion.

[0010] Optionally, the outer wall of the first rotating protrusion is rotatably connected with a sliding circular plate, the top end of the sliding circular plate is provided with a first rotating groove, the bottom end of the sliding circular plate is fixedly connected with a plurality of sliding columns arranged in a circumferential array, the middle outer wall of the plurality of sliding columns is fixedly connected with the same limiting ring, and the bottom end of the sliding column is fixedly connected with a temperature control ball.

[0011] Optionally, the outer wall of the sliding column close to the temperature control ball is fixedly connected with a stirring plate, the outer wall of the top of the first fixed circular plate close to the second avoiding slot is fixedly connected with a plurality of first elastic plates arranged in a circumferential array, and the end of the first elastic plate away from the first fixed circular plate is fixedly connected with a second rotating protrusion.

[0012] Optionally, the plurality of second rotating protrusions are rotatably connected with the same second fixed circular plate, the top outer wall of the second fixed circular plate is provided with a plurality of second sliding holes arranged in a circumferential array, the top outer wall of the second fixed circular plate close to the second sliding hole is provided with a second rotating groove, and the inner wall of the second rotating groove away from the second fixed circular plate is provided with a plurality of first water flowing grooves arranged in a circumferential array.

[0013] Optionally, a third rotating groove is formed in the bottom outer wall of the first fixed circular plate, a plurality of third rotating protrusions are rotatably connected to the inner wall of the third rotating groove, the bottom ends of the plurality of third rotating protrusions are fixedly connected with support columns, the outer wall of the side of the support column away from the center axis of the distillation kettle is fixedly connected with a first arc-shaped column at a position close to the top and a second arc-shaped column at a position close to the bottom.

[0014] Optionally, the two ends of the first arc-shaped column are fixedly connected with third elastic plates in a symmetrical manner, a third avoiding groove is formed in the outer wall of the side of the top of the first arc-shaped column away from the center axis of the first fixed circular plate, a plurality of second water flowing grooves arranged in an arc-shaped array are formed in the outer wall of the side of the first arc-shaped column away from the center axis of the first fixed circular plate, the two ends of the second arc-shaped column are fixedly connected with fourth elastic plates in a symmetrical manner, and a first sliding groove is formed in the outer wall of the side of the support column away from the center axis of the first fixed circular plate.

[0015] Optionally, a sliding cavity is formed in the inside of the support column, a T-shaped sliding plate is slidingly connected to the inner wall of the sliding cavity, a shovel plate is fixedly connected to the side of the T-shaped sliding plate away from the first fixed circular plate, a second abutting block is fixedly connected to the side of the T-shaped sliding plate close to the first fixed circular plate, the outer wall of the second abutting block is abutted with a first abutting block, and the top end of the first abutting block is fixedly connected with a cable.

[0016] Optionally, a second sliding groove and a third sliding groove are formed in the outer wall of the side of the support column close to the center axis of the first fixed circular plate, a spring is fixedly connected to the top inner wall of the third sliding groove, a connecting plate is fixed to the bottom end of the spring, a U-shaped clamping plate is fixedly connected to the end of the connecting plate away from the third sliding groove, and guide plates are fixedly connected to the two ends of the U-shaped clamping plate in a symmetrical manner.

[0017] Compared with the prior art, the present application has at least the following advantages:

[0018] In the above scheme, by arranging the cleaning assembly, not only can the stains attached to the inner wall of the distillation kettle due to explosive boiling and sputtering be scraped off, thereby avoiding the trouble of secondary cleaning, but also the rate of the distilled steam entering the tower body during the distillation process can be controlled, thereby avoiding the overflow of uncooled steam due to the overload of the cooling unit, and air pollution is avoided.

[0019] By arranging the nut, sliding circular plate, sliding column and stirring plate in the cleaning assembly, the position of the stirring plate can be adjusted by screwing the nut according to the volume of the material in the distillation kettle, so that the stirring plate is in the middle of the material, and then stirring is performed, so that the material can be uniformly heated when heated, and local explosive boiling of the material is avoided, the stains on the inner wall of the distillation kettle due to explosive boiling and sputtering are reduced, and the subsequent cleaning pressure is reduced.

[0020] By setting the first fixed circular plate, the second fixed circular plate, the first elastic plate and the limiting ring in the cleaning assembly, the distance between the second fixed circular plate and the second avoiding groove can be adjusted by screwing the nut, so that the pure water can be guided during the flushing process, and the steam generated during the distillation process can be controlled to enter the tower body at a certain rate, so that the uncooled steam is prevented from overflowing due to overload of the cooling unit.

[0021] By setting the T-shaped sliding plate, the U-shaped clamping plate, the connecting plate, the shovel plate, the first arc-shaped column, the second arc-shaped column and the supporting column in the cleaning assembly, not only can the stubborn stains on the inner wall of the distillation kettle be scraped off, but also the cleaning efficiency of the workers can be effectively improved; after the shovel plate is worn out after long-term use, the self-compensation effect is provided, so that the gap between the shovel plate and the inner wall of the distillation kettle is avoided, so that the cleaning effect is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the application and, together with the description, further serve to explain the principles of the application and to enable a person skilled in the relevant art to implement and use the application.

[0023] Figure 1 Stereoscopic structure schematic diagram of a vacuum distillation device for producing p-menthane hydrogen peroxide;

[0024] Figure 2 Stereoscopic structure schematic diagram of a distillation kettle, a kettle cover, a motor and a supporting frame in cooperation with a half-section enlarged view;

[0025] Figure 3 Stereoscopic structure schematic diagram of a distillation kettle, a kettle cover and a supporting frame in cooperation with a half-section enlarged view;

[0026] Figure 4 Stereoscopic structure schematic diagram of a motor, a first fixed circular plate, a first arc-shaped column and a second arc-shaped column in cooperation with an enlarged view;

[0027] Figure 5 Stereoscopic structure schematic diagram of a motor, a threaded shaft and a rotating plate in cooperation with an enlarged view;

[0028] Figure 6 Stereoscopic structure schematic diagram of a sliding column, a stirring plate and a nut in cooperation with an enlarged view;

[0029] Figure 7 Stereoscopic structure schematic diagram of a first fixed circular plate and a second fixed circular plate in cooperation with an enlarged view;

[0030] Figure 8 Stereoscopic structure schematic diagram of a first fixed circular plate and a second fixed circular plate in cooperation with a half-section enlarged view;

[0031] Figure 9Schematic diagram of the first arc-shaped column, the supporting column, and the second arc-shaped column in cooperation and enlarged perspective structure;

[0032] Figure 10 Schematic diagram of the first arc-shaped column, the supporting column, the second arc-shaped column, the third elastic plate, and the fourth elastic plate in cooperation and enlarged perspective structure;

[0033] Figure 11 Schematic diagram of the first arc-shaped column, the supporting column, the second arc-shaped column, the third elastic plate, and the fourth elastic plate in cooperation and enlarged perspective structure;

[0034] Figure 12 Schematic diagram of the first arc-shaped column, the supporting column, the second arc-shaped column, the third elastic plate, and the fourth elastic plate in cooperation and enlarged perspective structure; Figure 11 Schematic diagram of the first arc-shaped column, the supporting column, the second arc-shaped column, the third elastic plate, and the fourth elastic plate in cooperation and enlarged perspective structure;

[0035] Figure 13 Schematic diagram of the T-shaped sliding plate, the shovel plate, and the second contact block in cooperation and enlarged perspective structure;

[0036] Figure 14 Schematic diagram of the connecting plate, the U-shaped clamping plate, and the guide plate in cooperation and enlarged perspective structure.

[0037] Reference signs:

[0038] 1, distillation still; 101, feed pipe; 2, still cover; 201, manhole; 3, limiting groove; 4, connecting cylinder; 5, first avoiding groove; 6, tower body; 7, water inlet pipe; 8, supporting frame; 9, heating layer; 10, drain pipe; 11, vacuum pipe; 12, motor; 13, threaded rotating shaft; 14, rotating plate; 15, first sliding hole; 16, sliding column; 17, sliding circular plate; 18, first rotating groove; 19, nut; 20, limiting ring; 21, first rotating protrusion; 22, temperature control ball; 23, stirring plate; 24, first fixed circular plate; 25, third rotating groove; 26, second avoiding groove; 27, first elastic plate; 28, second rotating protrusion; 29, second fixed circular plate; 30, second rotating groove; 31, first water flowing groove; 32, second sliding hole; 33, third rotating protrusion; 34, first arc-shaped column; 35, third elastic plate; 36, third avoiding groove; 37, second water flowing groove; 38, supporting column; 39, second arc-shaped column; 40, fourth elastic plate; 41, connecting plate; 42, U-shaped clamping plate; 43, guide plate; 44, sliding cavity; 45, second sliding groove; 46, third sliding groove; 47, first sliding groove; 48, spring; 49, first contact block; 50, inhaul cable; 51, T-shaped sliding plate; 52, shovel plate; 53, second contact block.

[0039] As shown in the drawings, in order to clearly realize the structure of the embodiments of the present application, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the present application in the specific structures, devices and environments, and those skilled in the art can adjust or modify these devices and environments according to specific needs. DETAILED DESCRIPTION

[0040] The hydrogen peroxide pair of monomethane production with vacuum distillation device is described in detail below in combination with the drawings and specific embodiments. It should be noted that in order to make the embodiments more detailed, the following embodiments are the best, preferred embodiments, and other alternative ways can also be used by those skilled in the art to implement some known technologies; and the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the present application.

[0041] It should be noted that in the specification, "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like indicate that the described embodiments can include specific features, structures or characteristics, but not necessarily every embodiment includes the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in combination with an embodiment, it should be within the knowledge of those skilled in the related art to realize this feature, structure or characteristic in combination with other embodiments (whether or not explicitly described).

[0042] As Figures 1 to 14As shown, the embodiment of the present application provides a kind of vacuum distillation device for hydrogen peroxide pair monobutane production, including distillation kettle 1, distillation kettle 1 is metal material, the top of distillation kettle 1 is fixedly connected with kettle cover 2 by lock catch, kettle cover 2 is metal material, the outer wall of distillation kettle 1 is fixedly connected with feed pipe 101, feed pipe 101 is metal hollow pipe, feed pipe 101 is connected with the inner wall of distillation kettle 1, can be by feed pipe 101 to the material in distillation kettle 1 is input, the top of kettle cover 2 is fixedly connected with connecting cylinder 4, connecting cylinder 4 is metal hollow cylinder, the outer wall of connecting cylinder 4 is symmetrically provided with first avoiding slot 5, first avoiding slot 5 is the groove of square structure, the outer wall of kettle cover 2 close to connecting cylinder 4 is fixedly connected with manhole 201, water inlet pipe 7, vacuum pipe 11 and tower body 6, wherein manhole 201 is convenient for staff to observe the distillation condition of material;Water inlet pipe 7 is used to connect external water source to add water in distillation kettle 1 after distillation is completed, realizes the flushing of distillation kettle 1;Vacuum pipe 11 is used to connect vacuum pump, creates and stably maintains specific negative pressure (usually 1-10kPa) for distillation kettle 1 and tower body 6, accurately controls boiling point, to benefit material distillation;Tower body 6 is installed with cooling unit at the top, the steam formed after material in distillation kettle 1 is distilled, will pass through tower body 6 and enter cooling unit, condenses again and then flows into storage tank by pipeline, and manhole 201, water inlet pipe 7, vacuum pipe 11 and tower body 6 are circumferentially arrayed on the top outer wall of kettle cover 2, all are connected with the inner wall of kettle cover 2, the inner wall close to the top of distillation kettle 1 is provided with limiting slot 3, limiting slot 3 is the annular groove of square structure cross section, the bottom of distillation kettle 1 is installed with drain pipe 10, drain pipe 10 is connected with the inner wall of distillation kettle 1, drain pipe 10 is used to discharge residual waste after distillation, the bottom of distillation kettle 1 is provided with heating layer 9, heating layer 9 is made of electric heating wire, can be used to heat in distillation kettle 1, the outer wall of the middle part of distillation kettle 1 is fixedly connected with support frame 8 by screw, support frame 8 is metal material, support frame 8 is used to support and fix distillation kettle 1, wherein the metal material in the whole text can use corrosion-resistant metal, such as stainless steel;Cleaning assembly, cleaning assembly is used for cleaning the inner wall of distillation kettle 1, cleaning assembly is connected with distillation kettle 1 and connecting cylinder 4 respectively.

[0043] The present application is provided with cleaning assembly, not only can scrape the stains attached to the inner wall of distillation kettle 1 due to explosive boiling sputtering, thereby avoiding the trouble of secondary cleaning, but also can control the rate of steam entering tower body 6 during distillation, avoid the overflow of uncooled steam due to the overload of cooling unit, cause air pollution.

[0044] In the embodiment, as Figures 1 to 6As shown, the cleaning assembly comprises a motor 12 fixedly connected to the top end of the connecting cylinder 4, the bottom end of the motor 12 is provided with a threaded rotating shaft 13, the threaded rotating shaft 13 is a metal cylinder with threads on the outer wall, the bottom end of the threaded rotating shaft 13 is fixedly connected with a rotating plate 14, the rotating plate 14 is a metal circular plate, a plurality of first sliding holes 15 are arranged in a circumferential array on the outer wall of the rotating plate 14, the first sliding hole 15 is a circular groove, and there are three first sliding holes 15, a nut 19 is screwed on the outer wall of the threaded rotating shaft 13, threads are formed on the inner wall of the nut 19, the inner wall profile of the nut 19 is matched with the outer wall profile of the threaded rotating shaft 13, so that the nut 19 can rotate on the outer wall of the threaded rotating shaft 13, the bottom end of the nut 19 is fixedly connected with a first rotating protrusion 21, the first rotating protrusion 21 is an annular metal block with a convex structure in cross section, a sliding circular plate 17 is rotatably connected to the outer wall of the first rotating protrusion 21, the sliding circular plate 17 is a metal circular plate, a first rotating groove 18 is formed in the top end of the sliding circular plate 17, the first rotating groove 18 is an annular groove with a convex structure in cross section, and the outer wall profile of the first rotating protrusion 21 is matched with the inner wall profile of the first rotating groove 18, so that the first rotating protrusion 21 can rotate on the inner wall of the first rotating groove 18, a plurality of sliding columns 16 are fixedly connected to the bottom end of the sliding circular plate 17 in a circumferential array, the sliding column 16 is a metal cylinder, and there are three sliding columns 16, and the outer wall profile of the sliding column 16 is matched with the inner wall profile of the first sliding hole 15, so that the sliding column 16 can slide on the inner wall of the first sliding hole 15, the same limiting ring 20 is fixedly connected to the middle portion of the outer wall of the three sliding columns 16, the limiting ring 20 is a metal ring, a temperature control ball 22 is fixedly connected to the bottom end of the sliding column 16, the temperature control ball 22 is a prior art, so it will not be described here, the temperature control ball 22 is used to monitor the temperature of the material during the distillation process, and the stirring plate 23 is fixedly connected to the outer wall of the sliding column 16 close to the temperature control ball 22, the stirring plate 23 is a square metal plate, and the three stirring plates 23 can be driven by the motor 12 to stir the material.

[0045] After the staff put the material into the distillation kettle 1 through the feeding pipe 101, the volume of the material in the distillation kettle 1 is observed through the manhole 201, then the threaded rotating shaft 13 is fixed by using a tool to pass through the first avoiding groove 5, then the nut 19 is screwed clockwise by using a wrench, at this time the nut 19 will rotate and move away from the motor 12 along the outer wall of the threaded rotating shaft 13, and push the sliding circular plate 17 to slide along the inner wall of the connecting cylinder 4 to the bottom of the distillation kettle 1, in this process, since the first rotating protrusion 21 rotates on the inner wall of the first rotating groove 18, the nut 19 will not rotate the sliding circular plate 17; at the same time, the three sliding columns 16 are driven by the sliding circular plate 17 to move to the bottom of the distillation kettle 1 along the inner wall of the three first sliding holes 15 respectively, and the three stirring plates 23 will also move synchronously with the three sliding columns 16 respectively until the three stirring plates 23 reach the middle of the material, conversely, when the nut 19 is screwed counterclockwise by using a wrench, the nut 19 will rotate and move to the motor 12 along the outer wall of the threaded rotating shaft 13, and pull the sliding circular plate 17 to slide along the inner wall of the connecting cylinder 4 to the motor 12, at this time the three sliding columns 16 are driven by the sliding circular plate 17 to move to the motor 12 along the inner wall of the three first sliding holes 15 respectively, and the three stirring plates 23 will also move synchronously with the three sliding columns 16 respectively, in this way, the position of the stirring plate 23 can be adjusted according to the volume of the material in the distillation kettle 1, so that it always remains in the middle of the material, then the motor 12 is started, the motor 12 drives the threaded rotating shaft 13 to rotate and drives the rotating plate 14 to rotate when rotating, the rotating plate 14 in turn drives the three sliding columns 16 to rotate, and the three stirring plates 23 will rotate synchronously under the driving of the three sliding columns 16 respectively, to realize the stirring of the material, finally the temperature of the material is monitored by the temperature control ball 22, when the material reaches the required temperature range for distillation, the stirring is stopped to avoid the temperature of the material exceeding the predetermined temperature range due to stirring, causing the material to decompose violently and the material to appear local boiling, the above structure can adjust the position of the stirring plate 23 by screwing the nut 19 according to the volume of the material in the distillation kettle 1, so that it is in the middle of the material before stirring, which can make the material evenly heated when the material is heated, and it is not easy to cause local boiling of the material, reduce the dirt on the inner wall of the distillation kettle 1 due to sputtering caused by boiling, and reduce the subsequent cleaning pressure.

[0046] In the present embodiment, as Figures 4 to 8As shown, the cleaning assembly further comprises a first fixed circular plate 24 slidingly connected to the inner wall of the first escape groove 5. The first fixed circular plate 24 is a transparent acrylic circular plate, and the outer wall profile of the first fixed circular plate 24 is matched with the inner wall profile of the first escape groove 5, so that the first fixed circular plate 24 can be slid into the first escape groove 5. Then, the still cover 2 is covered on the distillation still 1, and the lock is locked, so that the first fixed circular plate 24 can be fixed. A second escape groove 26 is formed in the middle outer wall of the first fixed circular plate 24. The second escape groove 26 is a convex groove. A plurality of first elastic plates 27 are fixedly connected to the outer wall of the top of the first fixed circular plate 24 near the second escape groove 26. The first elastic plates 27 are C-shaped plastic plates, and there are three first elastic plates 27. When the first elastic plates 27 are stressed, they will be deformed along the bending direction. A second rotating protrusion 28 is fixedly connected to one end of the first elastic plate 27 away from the first fixed circular plate 24. The second rotating protrusion 28 is a plastic cylinder with a convex cross section. The same second fixed circular plate 29 is rotatably connected to the three second rotating protrusions 28. The second fixed circular plate 29 is a transparent acrylic circular plate with a convex cross section. The outer wall profile of the second fixed circular plate 29 is matched with the inner wall profile of the second escape groove 26, so that the second fixed circular plate 29 can be slid into the second escape groove 26. The first fixed circular plate 24 and the second fixed circular plate 29 cooperate to form a transparent disc. The disc formed by the first fixed circular plate 24 and the second fixed circular plate 29 can block the splashes of the material due to the explosive boiling, so as to prevent the splashes from adhering to the inner wall of the top of the still cover 2 and polluting the tower body 6, thereby reducing the difficulty of subsequent cleaning. Moreover, the disc will not block the observation of the material state in the distillation still 1 by the worker through the manhole 201. A plurality of second sliding holes 32 are formed in the top outer wall of the second fixed circular plate 29 in a circumferential array. There are three second sliding holes 32. The second sliding holes 32 are circular holes, and the inner wall profile of the second sliding holes 32 is matched with the outer wall profile of the sliding column 16, so that the end of the sliding column 16 away from the sliding disc 17 can slide in the second sliding hole 32. When the sliding column 16 slides along the inner wall of the second sliding hole 32 towards the bottom of the distillation still 1, the limiting ring 20 will move towards the bottom of the distillation still 1 under the drive of the sliding column 16. At this time, the outer wall close to the bottom of the limiting ring 20 will abut against the top outer wall of the second fixed circular plate 29, and drive the second fixed circular plate 29 to move towards the bottom of the distillation still 1. The first elastic plate 27 will be stressed and deformed along the bending direction. At this time, if the distillation still 1 is flushed, pure water enters the distillation still 1 from the water inlet pipe 7, falls on the first fixed circular plate 24, flows to the top of the second fixed circular plate 29 through the second escape groove 26, spreads around, and finally hits the inner wall of the distillation still 1 under the guidance of the second fixed circular plate 29. Conversely, if it is found that there is steam overflow in the pipeline, it means that the cooling unit has been overloaded. At this time, the nut 19 can be counterclockwise screwed to drive the limiting ring 20 on the sliding column 16 to move towards the motor 12,The pressure on the first elastic plate 27 is reduced, and part of the deformation in the bending direction is recovered, and the second fixed circular plate 29 is driven to move in the direction of the second avoiding slot 26, thereby shortening the distance between the second fixed circular plate 29 and the second avoiding slot 26, and reducing the rate of steam entering the tower body 6. The second rotating slot 30 is provided on the outer wall of the top of the second fixed circular plate 29 close to the second sliding hole 32. The second rotating slot 30 is a convex structure slot, and the inner wall profile of the second rotating slot 30 is matched with the outer wall profile of the second rotating protrusion 28. Therefore, the three second rotating protrusions 28 can rotate on the inner wall of the second rotating slot 30. When the sliding column 16 slidingly connected in the second sliding hole 32 is driven to rotate by the motor 12, the second fixed circular plate 29 will rotate synchronously with the sliding column 16, but the first elastic plate 27 and the first fixed circular plate 24 will not rotate with the second fixed circular plate 29. A plurality of first water flow grooves 31 in circumferential array are provided on the inner wall of the second fixed circular plate 29 away from the second rotating slot 30. The first water flow groove 31 is a cylindrical structure slot, and the first water flow groove 31 penetrates from the side wall of the second fixed circular plate. The first water flow groove 31 can drain the accumulated water in the second rotating slot 30 when the distillation kettle 1 is washed. The above structure can adjust the distance between the second fixed circular plate 29 and the second avoiding slot 26 by screwing the nut 19. In this way, the pure water can be guided during the washing process, so that the pure water is washed to the inner wall of the distillation kettle 1, and the rate of steam entering the tower body 6 during the distillation process is controlled, so that the uncooled steam is prevented from overflowing due to the overload of the cooling unit.

[0047] As Figures 6 to 14As shown, the bottom outer wall of the first fixed circular plate 24 is provided with a third rotating groove 25, which is an annular groove with convex cross-section. The inner wall of the third rotating groove 25 is rotatably connected with a plurality of third rotating protrusions 33. The third rotating protrusions 33 are three in total and are metal cylinders with convex cross-section. The outer wall profile of the third rotating protrusions 33 is matched with the inner wall profile of the third rotating groove 25, so that the third rotating protrusions 33 can rotate on the inner wall of the third rotating groove 25. The bottom ends of the three third rotating protrusions 33 are fixedly connected with support columns 38, which are square metal columns. The outer wall of the side of the support column 38 away from the central axis of the distillation kettle 1 is fixedly connected with a first arc-shaped column 34 near the top and a second arc-shaped column 39 near the bottom. The first arc-shaped column 34 and the second arc-shaped column 39 are metal columns with square cross-section and have a certain arc to match the inner wall arc of the distillation kettle 1. The two ends of the first arc-shaped column 34 are symmetrically fixedly connected with third elastic plates 35, and the two ends of the second arc-shaped column 39 are symmetrically fixedly connected with fourth elastic plates 40. The third elastic plates 35 and the fourth elastic plates 40 are C-shaped metal plates. When the third elastic plates 35 and the fourth elastic plates 40 are stressed, they will deform along their respective bending directions. The three first arc-shaped columns 34 and the three third elastic plates 35 are connected in pairs to form a circular ring, and the three second arc-shaped columns 39 and the three fourth elastic plates 40 are connected in pairs to form a circular ring. During installation, the three first arc-shaped columns 34 and the three second arc-shaped columns 39 are squeezed respectively to stress the three third elastic plates 35 and the three fourth elastic plates 40 and make them deform along their respective bending directions. At this time, the diameter of the circular ring formed by the first arc-shaped column 34 and the third elastic plate 35 is reduced, and the diameter of the circular ring formed by the second arc-shaped column 39 and the fourth elastic plate 40 is also reduced, which facilitates the installation of the first arc-shaped column 34, the second arc-shaped column 39, the third elastic plate 35, and the fourth elastic plate 40 into the distillation kettle 1. The outer wall of the side of the second arc-shaped column 39 close to the center of the distillation kettle 1 is provided with a chamfer, which can guide the pure water flowing down the side wall of the distillation kettle 1 and facilitate the flow of the washed pure water to the drain pipe 10 of the distillation kettle 1. The outer wall of the side of the first arc-shaped column 34 away from the central axis of the first fixed circular plate 24 is provided with a third avoiding groove 36, which is a three-prism-shaped groove. During the washing process, the third avoiding groove 36 can collect a certain amount of pure water in cooperation with the inner wall of the distillation kettle 1. The outer wall of the side of the first arc-shaped column 34 away from the central axis of the first fixed circular plate 24 is provided with a plurality of second water flow grooves 37 arranged in an arc array, which are semicircular grooves. The second water flow grooves 37 can guide the pure water collected by the third avoiding groove 36 to flow down the inner wall of the distillation kettle 1.

[0048] The support column 38 is provided with a first sliding groove 47 on the outer wall away from the center axis of the first fixed circular plate 24, the first sliding groove 47 is a square groove, the support column 38 is internally provided with a sliding cavity 44, the sliding cavity 44 is a square groove, and the first sliding groove 47 is in communication with the sliding cavity 44, a T-shaped sliding plate 51 is slidably connected to the inner wall of the sliding cavity 44, the T-shaped sliding plate 51 is a T-shaped metal plate, the outer wall profile of the T-shaped sliding plate 51 is matched with the inner wall profile of the sliding cavity 44, so that the T-shaped sliding plate 51 can slide in the sliding cavity 44, a shovel plate 52 is fixedly connected to the side of the T-shaped sliding plate 51 away from the first fixed circular plate 24, the shovel plate 52 is an arc-shaped metal plate, and a chamfer is arranged at the end of the shovel plate 52 away from the T-shaped sliding plate 51, the arrangement of the chamfer is beneficial to the shovel plate 52 to shovel the stains on the inner wall of the distillation kettle 1, when the T-shaped sliding plate 51 slides along the inner wall of the sliding cavity 44 away from the center axis of the first fixed circular plate 24, the shovel plate 52 will move synchronously with the T-shaped sliding plate 51, the end of the shovel plate 52 away from the T-shaped sliding plate 51 will abut against the inner wall of the distillation kettle 1, so that the shovel plate 52 is stressed and deformed along the curved direction, at this time, under the elastic effect of the shovel plate 52 itself, the end provided with the chamfer will abut against the inner wall of the distillation kettle 1 more closely, a second abutting block 53 is fixedly connected to the side of the T-shaped sliding plate 51 close to the first fixed circular plate 24, the second abutting block 53 is a trapezoidal metal column, and the inclined surface of the second abutting block 53 faces the bottom of the distillation kettle 1, a first abutting block 49 abuts against the outer wall of the second abutting block 53, the first abutting block 49 is a square metal column, and an inclined surface is arranged on the side of the first abutting block 49 close to the T-shaped sliding plate 51, wherein the inclined surfaces of the first abutting block 49 and the second abutting block 53 abut together, a cable 50 is fixedly connected to the top end of the first abutting block 49, the cable 50 is made of metal, a second sliding groove 45 and a third sliding groove 46 are arranged on the outer wall of the support column 38 close to the center axis of the first fixed circular plate 24, wherein the second sliding groove 45 is a square groove in communication with the sliding cavity 44, and the second sliding groove 45 is arranged at the position close to the top of the support column 38, since the inner wall profile of the second sliding groove 45 is matched with the outer wall profile of the cable 50, the cable 50 can pass through the second sliding groove 45, and the third sliding groove 46 is a convex groove, the third sliding groove 46 is arranged at the position close to the bottom of the support column 38, a spring 48 is fixedly connected to the top inner wall of the third sliding groove 46, the spring 48 will be deformed along the curved direction when being stressed, a connecting plate 41 is fixed to the bottom end of the spring 48, the connecting plate 41 is a convex metal plate, and the end of the connecting plate 41 close to the support column 38 is matched with the inner wall profile of the third sliding groove 46, so that the connecting plate 41 can slide on the inner wall of the third sliding groove 46, a U-shaped clamping plate 42 is fixedly connected to the end of the connecting plate 41 away from the third sliding groove 46, the U-shaped clamping plate 42 is a U-shaped metal plate,And the inner wall profile of the U-shaped clamping plate 42 is matched with the outer wall profile of the stirring plate 23 mentioned above, so the stirring plate 23 can be inserted into the U-shaped clamping plate 42, and the two ends of the U-shaped clamping plate 42 are symmetrically fixedly connected with the guide plates 43 which are square structure metal plates and are inclined to provide guidance when the stirring plate 23 is inserted into the U-shaped clamping plate 42.

[0049] When the distillation is started, the staff first slightly rotates the threaded rotating shaft 13 to align any one of the three sliding columns 16 with the manhole 201, and then rotates the nut 19 clockwise to drive the stirring plate 23 to move towards the bottom of the distillation kettle 1, when the temperature control ball 22 abuts against the inner wall of the bottom of the distillation kettle 1, the stirring plate 23 will be inserted between the U-shaped clamping plates 42 under the guidance of the two guide plates 43; under the driving of the stirring plate 23, the U-shaped clamping plates 42 are synchronously moved towards the bottom of the distillation kettle 1, the connecting plates 41 are also moved downwards along the inner wall of the third sliding groove 46, so that the springs 48 are stressed and deformed along the bending direction, at the same time, the movement of the connecting plates 41 pulls the inhaul 50 to drive the first abutting block 49 to move along the inner wall of the sliding cavity 44 towards the first arc-shaped column 34; under the abutting action of the first abutting block 49, the second abutting block 53 drives the T-shaped sliding plate 51 to slide along the inner wall of the sliding cavity 44 away from the center axis of the first fixed circular plate 24, and the shovel plate 52 moves synchronously with the T-shaped sliding plate 51, and the end thereof away from the T-shaped sliding plate 51 abuts against the inner wall of the distillation kettle 1 and is stressed to be deformed along the bending direction; after the distillation is completed, the staff first discharges the waste in the distillation kettle 1 from the drain pipe 10, and then opens the water inlet pipe 7 to pour pure water into the distillation kettle 1, as the pure water is poured, part of the pure water falls into the third avoiding groove 36, and the second water flow groove 37 guides the pure water collected in the groove to flow along the inner wall of the distillation kettle 1 to wet the stains on the inner wall of the distillation kettle 1 due to heating, and then the motor 12 is started, the motor 12 drives the stirring plate 23 to rotate, the stirring plate 23 stirs the pure water in the distillation kettle 1, the stirred pure water washes the bottom outer wall of the first fixed circular plate 24 and the second fixed circular plate 29, at the same time, the stirring plate 23 drives the U-shaped clamping plates 42 to rotate, the U-shaped clamping plates 42 drive the connecting plates 41 to rotate; the support columns 38 are synchronously rotated under the driving of the connecting plates 41, the T-shaped sliding plate 51 rotates with the support columns 38, and the shovel plate 52 also rotates, and the end thereof provided with the chamfer removes the stains on the inner wall of the distillation kettle 1, and the removed stains mixed with the pure water flow along the chamfer of the second arc-shaped column 39 close to the outer wall of the side of the distillation kettle 1 close to the center to the drain pipe 10 of the distillation kettle 1, the above structure not only can remove the stubborn stains on the inner wall of the distillation kettle 1 which cannot be washed away to effectively improve the cleaning efficiency of the staff, but also can provide self-compensation effect for the shovel plate 52 after long time use to avoid the gap between the shovel plate 52 and the inner wall of the distillation kettle 1, so as to ensure the cleaning effect.

[0050] The working principle of the technical solution provided by the application is as follows:

[0051] In use, after the staff pours the material into the distillation kettle 1 through the feeding pipe 101, the staff first observes the volume of the material through the manhole 201, then uses a tool to fix the threaded rotating shaft 13 through the first avoiding groove 5, then uses a wrench to rotate the nut 19 clockwise, at this time, the nut 19 will rotate and move away from the motor 12 along the outer wall of the threaded rotating shaft 13, and push the sliding circular plate 17 to slide along the inner wall of the connecting cylinder 4 to the bottom of the distillation kettle 1, in this process, the first rotating protrusion 21 rotates on the inner wall of the first rotating groove 18 and does not drive the sliding circular plate 17 to rotate; at the same time, the three sliding columns 16 are driven by the sliding circular plate 17 to move to the bottom of the distillation kettle 1 along the inner walls of the three first sliding holes 15, and the three stirring plates 23 also move synchronously until reaching the middle of the material, and conversely, when the nut 19 is rotated counterclockwise, the nut 19 will rotate and move to the motor 12 along the outer wall of the threaded rotating shaft 13, and pull the sliding circular plate 17 to slide along the inner wall of the connecting cylinder 4 to the motor 12, at the same time, the three sliding columns 16 are driven by the sliding circular plate 17 to move to the motor 12 along the inner walls of the three first sliding holes 15, and the three stirring plates 23 also move synchronously, in this way, the position of the stirring plate 23 can be adjusted according to the volume of the material, so that the stirring plate 23 is always kept in the middle of the material, then the motor 12 is started, when the motor 12 rotates, the threaded rotating shaft 13 is driven and the rotating plate 14 is rotated, the rotating plate 14 in turn drives the three sliding columns 16 to rotate, and the three stirring plates 23 rotate synchronously, so that the material is stirred, finally, the temperature is monitored through the temperature control ball 22, when the material reaches the required temperature range for distillation, the stirring is stopped to avoid the temperature of the material exceeding the required temperature range for distillation due to stirring.

[0052] Before starting distillation, the staff first slightly rotate the threaded shaft 13, so that any one of the three sliding columns 16 is aligned with the manhole 201, then rotate the nut 19 clockwise, so that the sliding column 16 slides along the inner wall of the second sliding hole 32 to the bottom of the distillation kettle 1, the limiting ring 20 will be driven by the sliding column 16 to move to the bottom of the distillation kettle 1, at this time, the outer wall near the bottom of the limiting ring 20 will be in contact with the top outer wall of the second fixed circular plate 29, and drive the second fixed circular plate 29 to move to the bottom of the distillation kettle 1, the first elastic plate 27 will be stressed and deformed along its bending direction, and the steam generated during distillation will enter the tower body 6 through the gap between the second fixed circular plate 29 and the second avoiding slot 26, with the movement of the sliding column 16, the stirring plate 23 will be driven to move to the bottom of the distillation kettle 1, until the temperature control ball 22 is in contact with the inner wall of the bottom of the distillation kettle 1, the stirring plate 23 will be inserted between the U-shaped clamping plate 42 under the guidance of the two guide plates 43; under the driving of the stirring plate 23, the U-shaped clamping plate 42 moves synchronously to the bottom of the distillation kettle 1, the connecting plate 41 also moves downward along the inner wall of the third sliding groove 46, thereby making the spring 48 stressed and deformed along its extension direction, at the same time, the movement of the connecting plate 41 will pull the cable 50, drive the first abutting block 49 to move along the inner wall of the sliding cavity 44 to the direction of the first arc-shaped column 34; under the abutting action of the first abutting block 49, the second abutting block 53 will drive the T-shaped sliding plate 51 to slide along the inner wall of the sliding cavity 44 to the direction away from the center axis of the first fixed circular plate 24, the shovel plate 52 moves synchronously with the T-shaped sliding plate 51, one end provided with a chamfer abuts on the inner wall of the distillation kettle 1 and is stressed to deform along its bending direction.

[0053] During the distillation process, if the steam overflow is found in the pipeline, it indicates that the cooling unit has been overloaded, at this time, the nut 19 can be twisted counterclockwise to drive the limiting ring 20 on the sliding column 16 to move towards the motor 12, the pressure borne by the first elastic plate 27 is reduced accordingly, part of the deformation of the first elastic plate 27 along the bending direction is restored, and the second fixed circular plate 29 is driven to move towards the second avoiding groove 26, thereby shortening the distance between the second fixed circular plate 29 and the second avoiding groove 26 and reducing the rate of steam entering the tower body 6. After the distillation is completed, the workers first discharge the waste in the distillation kettle 1 from the drain pipe 10, and then open the water inlet pipe 7 to pour pure water into the distillation kettle 1. With the injection of pure water, the pure water will fall onto the first fixed circular plate 24 after entering the distillation kettle 1 from the water inlet pipe 7, then flow to the top of the second fixed circular plate 29 through the second avoiding groove 26 and spread around, and finally rush to the inner wall of the distillation kettle 1 under the guidance of the second fixed circular plate 29; part of the pure water falls into the third avoiding groove 36, and the second water flow groove 37 can guide the pure water collected in the groove to flow along the inner wall of the distillation kettle 1, thereby wetting the dried stains on the kettle wall due to heating. Then the motor 12 is started again, the motor 12 drives the stirring plate 23 to rotate, the stirring plate 23 will agitate the pure water in the distillation kettle 1, the agitated pure water will flush the bottom outer wall of the first fixed circular plate 24 and the second fixed circular plate 29, and at the same time, the stirring plate 23 will drive the U-shaped clamping plate 42 to rotate, and the U-shaped clamping plate 42 will drive the connecting plate 41 to rotate; the supporting column 38 rotates synchronously under the drive of the connecting plate 41, the T-shaped sliding plate 51 rotates with the supporting column 38, and the shovel plate 52 also rotates, and the end provided with a chamfer thereof removes the stains on the inner wall of the distillation kettle 1, and the removed stains mixed with the pure water will flow along the chamfer of the second arc-shaped column 39 close to the outer wall of the distillation kettle 1 on one side close to the center of the distillation kettle 1 to the drain pipe 10 of the distillation kettle 1.

[0054] The present application encompasses any alternatives, modifications, equivalent methods and solutions made to the essence and scope of the present application. In order for the public to have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be completely understood without the description of these details to those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0055] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can also be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A vacuum distillation apparatus for the production of menthol from hydrogen peroxide, characterized in that, The utility model provides a distillation kettle, the top of distillation kettle is fixedly connected with kettle cover through the lock catch, the outer wall of distillation kettle is fixedly connected with feed pipe, the top of kettle cover is fixedly connected with connecting cylinder, the outer wall of connecting cylinder is symmetrically opened with first avoiding slot, the outer wall of kettle cover near connecting cylinder is fixedly connected with manhole, water inlet pipe, vacuum pipe and tower body, the inner wall of distillation kettle near top is opened with limiting groove, the bottom of distillation kettle is installed with drain pipe, the bottom of distillation kettle is provided with heating layer, the middle outer wall of distillation kettle is fixedly connected with support frame through screw. The cleaning assembly is used for cleaning the inner wall of the distillation kettle, and is connected with the distillation kettle and the connecting cylinder respectively. The cleaning assembly comprises a motor fixedly connected to the top of the connecting cylinder, and a first fixed circular plate slidingly connected to the inner wall of the first avoiding slot. The bottom end of the threaded rotating shaft is fixedly connected with a rotating plate, the outer wall of the rotating plate is provided with a plurality of first sliding holes arranged in a circumferential array, the outer wall of the threaded rotating shaft is screwed with a nut, and the bottom end of the nut is fixedly connected with a first rotating protrusion. The outer wall of the first rotating protrusion is rotatably connected with a sliding circular plate, the top end of the sliding circular plate is provided with a first rotating groove, the bottom end of the sliding circular plate is fixedly connected with a plurality of sliding columns arranged in a circumferential array, the middle outer wall of the plurality of sliding columns is fixedly connected with the same limiting ring, and the bottom end of the sliding column is fixedly connected with a temperature control ball. The outer wall of the sliding column close to the temperature control ball is fixedly connected with a stirring plate, the outer wall of the top of the first fixed circular plate close to the second avoiding slot is fixedly connected with a plurality of first elastic plates arranged in a circumferential array, and one end of the first elastic plate away from the first fixed circular plate is fixedly connected with a second rotating protrusion. A second fixed circular plate is rotatably connected with the plurality of second rotating protrusions, the top outer wall of the second fixed circular plate is provided with a plurality of second sliding holes arranged in a circumferential array, the top outer wall of the second fixed circular plate close to the second sliding hole is provided with a second rotating groove, and the inner wall of the second rotating groove away from the second fixed circular plate is provided with a plurality of first water flowing grooves arranged in a circumferential array.

2. The vacuum distillation apparatus for producing p-menthane hydroperoxide according to claim 1, wherein The bottom outer wall of the first fixed circular plate is provided with a third rotating groove, a plurality of third rotating protrusions are rotatably connected to the inner wall of the third rotating groove, the bottom end of the plurality of third rotating protrusions is respectively fixedly connected with support columns, the outer wall of the side of the support column away from the center axis of the distillation kettle is fixedly connected with a first arc-shaped column at a position close to the top, and is fixedly connected with a second arc-shaped column at a position close to the bottom.

3. The vacuum distillation apparatus for producing p-menthane hydroperoxide according to claim 2, wherein Two ends of the first arc-shaped column are symmetrically and fixedly connected with third elastic plates, a third avoiding slot is arranged on the outer wall of the top of the first arc-shaped column away from the center axis of the first fixed circular plate, a plurality of second water flow grooves arranged in an arc-shaped array are arranged on the outer wall of the first arc-shaped column away from the center axis of the first fixed circular plate, two ends of the second arc-shaped column are symmetrically and fixedly connected with fourth elastic plates, and a first sliding slot is arranged on the outer wall of the side of the supporting column away from the center axis of the first fixed circular plate.

4. The vacuum distillation apparatus for producing p-menthane hydroperoxide according to claim 3, wherein A sliding cavity is arranged in the inside of the supporting column, a T-shaped sliding plate is slidably connected to the inner wall of the sliding cavity, a shovel plate is fixedly connected to the side of the T-shaped sliding plate away from the first fixed circular plate, a second abutting block is fixedly connected to the side of the T-shaped sliding plate close to the first fixed circular plate, the outer wall of the second abutting block is in abutment with a first abutting block, and the top end of the first abutting block is fixedly connected with a cable.

5. The vacuum distillation apparatus for producing p-menthane hydroperoxide according to claim 4, wherein A second sliding slot and a third sliding slot are arranged on the outer wall of the side of the supporting column close to the center axis of the first fixed circular plate, a spring is fixedly connected to the top inner wall of the third sliding slot, a connecting plate is fixed to the bottom end of the spring, a U-shaped clamping plate is fixedly connected to the end of the connecting plate away from the third sliding slot, and guide plates are symmetrically fixedly connected to the two ends of the U-shaped clamping plate.

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