A decarboxylation reactor for monoketal production

Abstract

This utility model relates to the field of monoketal preparation technology, specifically a decarboxylation reactor for monoketal production, comprising a reactor body, a stirring device, and a drive device for driving the stirring device to rotate. The reactor body is provided with a feed valve at the top and a discharge pipe at the bottom, forming a cylindrical reaction chamber inside. The stirring device includes a vertically arranged hollow stirring shaft, which is rotatably connected to the center position of the top of the reactor body through a bearing assembly. This utility model achieves dynamic coupling of axial circulation, radial shearing, and particle dispersion of materials through the synergistic action of the three-section stirring shaft's helical propeller, cylindrical first stirring blade, and serrated dispersing blade, significantly improving mixing efficiency and shortening reaction time. The wall scraping mechanism drives the elastic scraper to rotate in the opposite direction through a magnetic commutator, adaptively conforming to the reactor wall to remove scale. Combined with the staggered shearing action of the second stirring blade and the main stirring blade on the scraper, a multi-directional turbulent flow is formed to enhance the mixing effect.

Description

Technical Field

[0001] This utility model relates to the field of monoketal preparation technology, and in particular to a decarboxylation reactor for monoketal production. Background Technology

[0002] In the production of monoketals, the mixing efficiency and reaction control of the decarboxylation reactor directly affect the product yield and quality. Traditional reactors often employ a single-blade structure, which suffers from insufficient axial material circulation and uneven particle dispersion, leading to prolonged reaction time.

[0003] Patent number CN201721507043.4 discloses a reactor for producing watermelon ketone, including a reactor body and an operating platform fixedly installed on the top of the reactor body. The operating platform has a placement cavity, and a telescopic motor is fixedly installed on the top inner wall of the placement cavity. The telescopic motor is vertically downward. A stirring motor is fixedly installed at the bottom end of the drive shaft of the telescopic motor. A stirring shaft is fixedly installed at the output end of the stirring motor, and the bottom end of the stirring shaft extends into the interior of the reactor body. A stirring paddle is fixedly installed on the stirring shaft located inside the reactor body.

[0004] The aforementioned device, employing a single paddle structure, suffers from problems such as difficulty in axial material circulation and uneven particle dispersion, resulting in prolonged reaction time and low stirring efficiency. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a decarboxylation reactor for the production of monoketals, so as to solve the problems of difficulty in axial material circulation and uneven particle dispersion caused by the use of a single paddle structure in the reactor, which leads to prolonged reaction time and low stirring efficiency.

[0006] To achieve the above objectives, this utility model provides a decarboxylation reactor for the production of monoketals, comprising a reactor body, a stirring device, and a drive device for driving the stirring device to rotate.

[0007] The reactor body is equipped with a feed valve at the top and a discharge pipe at the bottom, forming a cylindrical reaction chamber inside;

[0008] The stirring device includes a vertically arranged hollow stirring shaft, which is rotatably connected to the center of the top of the vessel body via a bearing assembly;

[0009] The stirring shaft is divided into three sections from top to bottom:

[0010] The upper section is equipped with a propeller;

[0011] At least two sets of first stirring blades are symmetrically arranged in the middle section, each set containing at least two radially extending cylindrical blades;

[0012] The lower section is equipped with a serrated dispersion propeller, and the edge of the propeller blade has a continuous triangular serrated structure.

[0013] In some alternative embodiments, the driving device includes a transmission rod rotatably disposed at the top of the inner cavity of the vessel, a drive motor for driving the transmission rod to rotate is disposed at the top of the vessel, a drive gear is fixedly disposed at the bottom of the transmission rod, and a driven gear ring that meshes with the drive gear is fixedly sleeved on the outer periphery of the stirring shaft.

[0014] In some alternative embodiments, the drive motor integrates a torque sensing module, which provides real-time feedback on the material viscosity value by detecting changes in motor current.

[0015] In some optional embodiments, the vessel body is further provided with a wall scraping mechanism, which includes at least two sets of circumferentially distributed elastic scrapers, each elastic scraper being connected to a commutator provided at the bottom end of the stirring shaft via a collar.

[0016] In some optional embodiments, the commutator includes a fixed rod fixed to the top of the vessel body, the fixed rod being disposed inside a hollow stirring shaft, the gap between the stirring shaft and the fixed rod being filled with lubricating oil, a sealing box being fixed to the bottom of the fixed rod, an upper bevel gear rotating at the top of the inner cavity of the sealing box, the upper bevel gear being connected to the bottom of the stirring shaft via a magnetic coupler, a lower bevel gear rotating at the bottom of the inner cavity, and a transmission bevel gear rotating on one side wall of the inner cavity, respectively meshing with the upper and lower bevel gears, an output rod rotating at the bottom of the sealing box and driving the lower bevel gear, and the outer periphery of the output rod being connected to a wall scraping mechanism.

[0017] In some alternative embodiments, the wall scraping mechanism further includes multiple sets of second stirring blades disposed on the elastic scraper, the multiple sets of second stirring blades being alternately arranged with the first stirring blades.

[0018] The beneficial effects of this embodiment are as follows: through the synergistic action of the three-section stirring shaft's spiral propeller, cylindrical first stirring blade, and serrated dispersing blade, dynamic coupling of axial circulation, radial shearing, and particle dispersion of materials is achieved, significantly improving mixing efficiency and shortening reaction time; the wall scraping mechanism drives the elastic scraper to rotate in the opposite direction through a magnetic commutator, adaptively adhering to the vessel wall to remove scale, and combined with the staggered shearing action of the second stirring blade and the main stirring blade on the scraper, forming a multi-directional turbulent flow to enhance the mixing effect. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in one or more embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a first-view structural diagram of the present invention;

[0021] Figure 2 This is a first-view cross-sectional structural diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the main cross-sectional structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the wall scraping mechanism described in this utility model;

[0024] Figure 5 This is a schematic diagram of the stirring mechanism described in this utility model;

[0025] Figure 6 This is a cross-sectional view of the commutator described in this utility model;

[0026] Figure 7 This is a schematic diagram of the main cross-sectional structure of the commutator described in this utility model.

[0027] The diagram is marked as follows:

[0028] 1. Kettle body; 11. Discharge pipe; 12. Feed valve; 2. Stirring shaft; 21. Drive motor; 211. Transmission rod; 212. Drive gear; 213. Driven gear ring; 22. Spiral propeller; 23. Sawtooth dispersion paddle; 24. First stirring blade; 25. Fixed rod; 3. Reversing device; 31. Upper bevel gear; 32. Transmission bevel gear; 33. Lower bevel gear; 34. Output rod; 35. Sealing box; 4. Wall scraping mechanism; 41. Collar; 42. Elastic scraper; 43. Second stirring blade. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0030] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] Please see Figures 1 to 7 As one embodiment of this utility model, a decarboxylation reactor for the production of monoketals includes a reactor body 1, a stirring device, and a drive device for driving the stirring device to rotate.

[0032] The reactor body 1 is provided with a feed valve 12 at the top and a discharge pipe 11 at the bottom, forming a cylindrical reaction chamber inside;

[0033] The stirring device includes a vertically arranged hollow stirring shaft 2, which is rotatably connected to the center of the top of the vessel body 1 via a bearing assembly;

[0034] The stirring shaft 2 is divided into three sections from top to bottom:

[0035] The upper section is equipped with a propeller 22;

[0036] At least two sets of first stirring blades 24 are symmetrically arranged in the middle section, each set containing at least two radially extending cylindrical blades;

[0037] The lower section is equipped with a serrated dispersion propeller 23, whose blade edge has a continuous triangular serrated structure.

[0038] In this embodiment, after the material enters the cylindrical reaction chamber of the vessel 1 through the top feed valve 12, the drive device starts and drives the hollow stirring shaft 2 to rotate. At this time, the spiral propeller 22 on the upper section of the stirring shaft 2 pushes the material downward axially to avoid accumulation at the top, and drives the material to circulate axially in the vertical direction. The first stirring blade 24, which is symmetrically distributed in the middle section, achieves uniform mixing of the material through radial shearing. The serrated dispersion blade 23 at the lower end uses its continuous triangular serrated structure to perform high-frequency cutting and dispersion of particles or bubbles in the reaction system. During the reaction, the material fully contacts and completes the decarboxylation reaction under the synergistic effect of the three-stage stirring structure. The final product is discharged through the bottom discharge pipe 11. The whole process realizes the dynamic coupling of axial flow enhancement, radial shearing dispersion and local crushing functions through the segmented stirring design, which significantly improves the reaction efficiency.

[0039] Please see Figures 1 to 7 Optionally, the driving device includes a transmission rod 211 rotatably disposed at the top of the inner cavity of the vessel body 1, a drive motor 21 for driving the transmission rod 211 to rotate is disposed at the top of the vessel body 1, a drive gear 212 is fixed at the bottom of the transmission rod 211, and a driven gear ring 213 that meshes with the drive gear 212 is fixedly sleeved on the outer periphery of the stirring shaft 2.

[0040] The drive motor 21 integrates a torque sensing module, which provides real-time feedback on the material viscosity value by detecting changes in motor current.

[0041] In this embodiment, after the drive motor 21 starts, it drives the transmission rod 211 to rotate. The drive gear 212 at the bottom of the transmission rod 211 meshes with the driven gear ring 213 sleeved on the outer periphery of the stirring shaft 2. The power is transmitted to the stirring shaft 2 through gear transmission, driving it to rotate at a set speed. At the same time, the torque sensing module integrated in the drive motor 21 monitors the motor's operating current in real time. Based on the correlation between the current change and the resistance experienced by the stirring shaft 2, the viscosity value of the material in the reaction chamber is calculated, and the data is fed back to the external control system. The control system adjusts the working power of the drive motor 21 according to the data to ensure that the stirring intensity matches the material state. This avoids motor overload under high viscosity conditions and allows indirect monitoring of the reaction process through viscosity data.

[0042] Please see Figures 1 to 7 Optionally, the vessel body 1 is also provided with a wall scraping mechanism 4, which includes at least two sets of elastic scrapers 42 distributed in the circumferential direction. Each elastic scraper 42 is connected to the commutator 3 provided at the bottom end of the stirring shaft 2 through a collar 41.

[0043] The commutator 3 includes a fixed rod 25 fixed to the top of the vessel body 1. The fixed rod 25 is set inside the hollow stirring shaft 2. The gap between the stirring shaft 2 and the fixed rod 25 is filled with lubricating oil. A sealing box 35 is fixed to the bottom of the fixed rod 25. An upper bevel gear 31 rotates at the top of the inner cavity of the sealing box 35. The upper bevel gear 31 is connected to the bottom of the stirring shaft 2 through a magnetic coupler. A lower bevel gear 33 rotates at the bottom of its inner cavity. A transmission bevel gear 32 rotates on one side wall of its inner cavity and meshes with the upper bevel gear 31 and the lower bevel gear 33 respectively. An output rod 34 rotates at the bottom of the sealing box 35 and drives the lower bevel gear 33. The outer periphery of the output rod 34 is connected to the wall scraping mechanism 4.

[0044] The wall scraping mechanism 4 also includes multiple sets of second stirring blades 43 disposed on the elastic scraper 42, and the multiple sets of second stirring blades 43 are staggered with the first stirring blade 24;

[0045] In this embodiment, when the stirring shaft 2 rotates, the magnetic coupler at its bottom drives the upper bevel gear 31 inside the commutator 3 sealed box 35 to rotate. Through meshing with the transmission bevel gear 32, the power is transmitted to the lower bevel gear 33, thereby causing the output rod 34 to move in the opposite direction of rotation to the stirring shaft 2. The output rod 34 drives the circumferentially distributed elastic scrapers 42 to rotate and scrape in the opposite direction along the inner wall of the vessel body 1. The elastic scrapers 42 adapt to the wall surface through deformation, removing adhering materials and preventing scaling. At the same time, multiple sets of second stirring blades 43 fixed on the elastic scrapers 42 move synchronously with the scrapers. Their staggered distribution with the first stirring blades 24 in the middle section of the stirring shaft 2 enhances the local mixing effect.

[0046] Working principle: After the material enters the cylindrical reaction chamber through the feed valve 12 at the top of the vessel 1, the drive motor 21 starts, driving the transmission rod 211 to rotate. Through the meshing of the drive gear 212 and the driven gear ring 213 on the outer periphery of the stirring shaft 2, the hollow stirring shaft 2 is driven to rotate around the fixed rod 25. The spiral propeller 22 on the upper section of the stirring shaft 2 pushes the material downward axially, forming a forced circulation flow in the vertical direction to avoid accumulation at the top. The cylindrical first stirring blades 24 symmetrically arranged in the middle section achieve uniform mixing of the material through radial shearing action. The serrated dispersion blade 23 in the lower section uses the continuous triangular serrated structure on the edge of the blade to perform high-frequency cutting and dispersion of particles or bubbles in the reaction system. During this process, the torque sensing module integrated in the drive motor 21 monitors the change of motor current in real time, calculates the viscosity value of the material, and feeds it back to the control system to automatically adjust the stirring speed to ensure that the motor power matches the viscosity of the material.

[0047] Meanwhile, the magnetic coupler at the bottom of the stirring shaft 2 drives the upper bevel gear 31 in the commutator 3 to rotate. The power is transmitted to the lower bevel gear 33 through the transmission bevel gear 32, causing the output rod 34 to move in the opposite direction of rotation to the stirring shaft 2. This drives the circumferentially distributed elastic scrapers 42 to scrape against the inner wall of the vessel body 1. The elastic scrapers 42 adapt to the wall surface through their own deformation, removing adhering materials and preventing scaling. The multiple sets of second stirring blades 43 on their surface rotate synchronously against the scrapers, forming an interlaced shear flow field with the first stirring blade 24 in the middle section of the stirring shaft 2, enhancing the local mixing effect.

[0048] After the decarboxylation reaction is completed, the product is discharged through the bottom discharge pipe 11. The whole process achieves the integrated function of axial circulation enhancement, radial shear dispersion, particle crushing and self-cleaning through the synergistic effect of three-stage stirring and reverse wall scraping mechanism 4, which significantly improves reaction efficiency and product uniformity.

[0049] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the scope of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of this invention as described above, which are not provided in the details for the sake of brevity.

[0050] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A decarboxylation reactor for producing monoketals, comprising a reactor body (1), a stirring device, and a drive device for driving the stirring device to rotate, characterized in that: The reactor body (1) is provided with a feed valve (12) at the top and a discharge pipe (11) at the bottom, forming a cylindrical reaction chamber inside; The stirring device includes a vertically arranged hollow stirring shaft (2), which is rotatably connected to the top center of the vessel body (1) via a bearing assembly; The stirring shaft (2) is divided into three sections from top to bottom: The upper section is equipped with a propeller (22); At least two sets of first stirring blades (24) are symmetrically arranged in the middle section, each set containing at least two radially extending cylindrical blades; The lower section is equipped with a serrated dispersion propeller (23), and the edge of the propeller blade is provided with a continuous triangular serrated structure.

2. The decarboxylation reactor for monoketal production according to claim 1, characterized in that, The driving device includes a transmission rod (211) rotatably disposed at the top of the inner cavity of the vessel body (1), a drive motor (21) for driving the transmission rod (211) to rotate is disposed at the top of the vessel body (1), a drive gear (212) is fixed at the bottom of the transmission rod (211), and a driven gear ring (213) that meshes with the drive gear (212) is fixedly sleeved on the outer periphery of the stirring shaft (2).

3. The decarboxylation reactor for monoketal production according to claim 2, characterized in that, The drive motor (21) integrates a torque sensing module, which provides real-time feedback on the material viscosity value by detecting changes in motor current.

4. The decarboxylation reactor for monoketal production according to claim 1, characterized in that, The vessel body (1) is also provided with a wall scraping mechanism (4), which includes at least two sets of elastic scrapers (42) distributed along the circumference. Each elastic scraper (42) is connected to a commutator (3) provided at the bottom end of the stirring shaft (2) through a collar (41).

5. The decarboxylation reactor for monoketal production according to claim 4, characterized in that, The commutator (3) includes a fixed rod (25) fixed to the top of the vessel body (1). The fixed rod (25) is set inside the hollow stirring shaft (2). The gap between the stirring shaft (2) and the fixed rod (25) is filled with lubricating oil. A sealing box (35) is fixed to the bottom of the fixed rod (25). An upper bevel gear (31) rotates at the top of the inner cavity of the sealing box (35). The upper bevel gear (31) is connected to the bottom of the stirring shaft (2) by a magnetic coupler. A lower bevel gear (33) rotates at the bottom of its inner cavity. A transmission bevel gear (32) rotates on one side wall of its inner cavity and meshes with the upper bevel gear (31) and the lower bevel gear (33) respectively. An output rod (34) rotates at the bottom of the sealing box (35) and drives the lower bevel gear (33). The outer periphery of the output rod (34) is connected to the wall scraping mechanism (4).

6. The decarboxylation reactor for monoketal production according to claim 5, characterized in that, The wall scraping mechanism (4) also includes multiple sets of second stirring blades (43) arranged on the elastic scraper (42), and the multiple sets of second stirring blades (43) are arranged alternately with the first stirring blade (24).

Images