Double-cone rotary vacuum dryer for producing prothioconazole intermediate

Abstract

The invention discloses a double-cone rotary vacuum drying machine for prothioconazole intermediate production, and relates to the technical field of medical intermediate production and processing.The double-cone rotary vacuum drying machine comprises two symmetrically-arranged supporting boxes and a double-cone drying cylinder, a stirring mechanism is arranged in the double-cone drying cylinder, and the stirring mechanism comprises a stepping motor; a first stirring rod is fixedly installed at the output end of the stepping motor, the sensing module is connected with the stepping motor, and the second stirring blades and the first stirring blades rotate reversely in the double-cone drying cylinder to stir materials in the double-cone drying cylinder, so that stirring is more uniform and sufficient, the stirring efficiency is high, the stirring effect is good, and the drying effect is good. And the material drying effect is improved. Meanwhile, the rotation information of the first stirring rod is determined according to the actual rotation speed and the target rotation speed of the first stirring rod, and the rotation speed of the stepping motor is intelligently adjusted through the processing module, so that the stirring mechanism can stir the materials as stably as possible through the intelligent adjustment of the stepping motor.

Description

Technical Field

[0001] The invention relates to the technical field of production and processing of pharmaceutical intermediates, and in particular to a double-cone rotary vacuum dryer for producing a prothioconazole intermediate. Background Art

[0002] Prothioconazole is a highly effective and broad-spectrum triazolethione fungicide developed by Bayer. It is low-toxic, non-teratogenic, mutagenic, non-embryotoxic, safe for humans and the environment. It is mainly used to control many diseases of wheat, cereals and legumes. Its activity is better than or equal to that of conventional fungicides such as fluconazole, tebuconazole, cyprodinil, etc. This fungicide not only has good systemic activity, but also has excellent protection, treatment and eradication activities, and has a long duration. Through a large number of field efficacy tests, the results show that prothioconazole not only has good safety for crops, good disease prevention and treatment effects, but also significantly increases yield. Compared with triazole fungicides, prothioconazole has a broader spectrum of fungicidal activity. 1-Chloro-2-(1-chlorocyclopropyl)-3-(2-chlorophenyl)-2-propanol is a commonly used intermediate in the synthesis of prothioconazole.

[0003] The intermediate needs to be dried for subsequent processing, and a double cone rotary vacuum dryer is often used to dry the intermediate. Since the existing double cone rotary vacuum dryer rotates the tank body itself, and there is no stirring mechanism in the tank body to stir the material, the drying efficiency of the material is affected. Summary of the invention

[0004] In order to solve the problems of the prior art, the present invention provides a double-cone rotary vacuum dryer for producing a prothioconazole intermediate, comprising two symmetrically arranged support boxes and a double-cone drying cylinder rotatably connected between the two support boxes;

[0005] A transparent observation window is provided on the surface of the double-cone drying cylinder;

[0006] A stirring mechanism is arranged in the double-cone drying cylinder, and the stirring mechanism comprises a stepping motor, and the stepping motor is fixedly mounted on the outer surface of the double-cone drying cylinder, and a first stirring rod is fixedly mounted on the output end of the stepping motor, and one end of the first stirring rod penetrates the outer surface of the double-cone drying cylinder and enters the inside of the double-cone drying cylinder and is movably mounted on the inner wall of the double-cone drying cylinder, and a plurality of first stirring blades are fixedly mounted on both sides of the outer surface of the first stirring rod, a movable gear is movably mounted on the upper part of the first stirring rod through a bearing, and an auxiliary stirring body is arranged on the upper part of the first stirring rod;

[0007] The sensor module is connected to the stepper motor, and the sensor module is connected to the processing module, for detecting the level signal change of the stepper motor;

[0008] The processing module is connected to the first stirring rod and is used to receive the level signal change of the motor detected by the sensor module; determine the actual speed of the motor according to the level signal change; and determine the rotation information of the first stirring rod according to the actual speed and the target speed;

[0009] The stepper motor is connected to the processing module and is used to control the rotation of the stepper motor according to the rotation information of the first stirring rod.

[0010] A further solution is that the auxiliary stirring body includes a mounting rod, which is fixedly mounted on the upper part of the first stirring rod, and second stirring rods are movably mounted on both sides of the left and right sides of the mounting rod, and a plurality of second stirring blades are fixedly mounted at equal distances on the left and right sides of the outer surfaces of the two second stirring rods, and a fixed gear is fixedly mounted on the upper part of the second stirring rod.

[0011] A further solution is that the two fixed gears are located in the same plane as the movable gear and mesh with each other, and the plurality of second stirring blades and the plurality of first stirring blades are arranged alternately and do not contact each other.

[0012] A further solution is to determine the first stirring rod rotation information according to a first calculated value obtained by calculating the ratio of the difference between the actual rotation speed and the target rotation speed to the target rotation speed.

[0013] A further solution is to determine the first stirring rod rotation information according to the first calculated value and a second calculated value obtained by integrating the difference between the actual rotation speed and the target rotation speed for a preset number of statistical times.

[0014] A further solution is to determine the first stirring rod rotation information based on the first calculated value, the second calculated value, and a third calculated value obtained by differentially calculating the current difference between the actual speed and the target speed in the preset statistical number of times and the previous difference between the actual speed and the target speed.

[0015] A further solution is that a discharge pipe is fixedly connected to the discharge port at the bottom of the double-cone drying cylinder, and an anti-accumulation mechanism cooperating with the discharge port at the bottom of the double-cone drying cylinder is installed inside the discharge pipe, the discharge pipe comprises a discharge port connecting pipe and a lowering pipe, the discharge port connecting pipe is vertically arranged, the lowering pipe is fixed to the bottom end of the discharge port connecting pipe, the angle formed by the lowering pipe and the discharge port connecting pipe is an obtuse angle, and an action block is arranged at the intersection of the discharge port connecting pipe and the lowering pipe; the anti-accumulation mechanism comprises a threaded rod, a hand wheel, A discharge port baffle, a baffle mounting seat and a torsion spring, the handwheel is fixed to the bottom end of the threaded rod, the baffle mounting seat is rotatably connected to the top of the threaded rod, a lower connecting plate is fixedly provided on the top of the baffle mounting seat, an upper connecting plate is fixedly provided on one side of the bottom end of the discharge port baffle, the upper connecting plate is rotatably connected to the lower connecting plate through a rotating shaft, the torsion spring is sleeved on one side of the rotating shaft, the upper end of the torsion spring is fixedly connected to the upper connecting plate, the lower end of the torsion spring is fixedly connected to the baffle mounting seat, and a baffle limiting block is fixedly provided on one side of the top of the lower connecting plate.

[0016] A further solution is that the threaded rod is threadedly connected to the discharge pipe, and the discharge port baffle is clearance-matched with the discharge port at the bottom of the double-cone drying cylinder.

[0017] A further solution is that a torsion spring connector is fixedly provided on one side of the baffle mounting seat, and the lower end of the torsion spring is plugged into the torsion spring connector.

[0018] A further solution is that a torsion spring limiting block is fixedly provided on one end of the rotating shaft, and a torsion spring supporting block is fixedly provided on one side surface of the upper connecting plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention starts the stepper motor, and the power output shaft of the stepper motor rotates to drive the first stirring rod to rotate. The rotation of the first stirring rod will drive the mounting rod to rotate, and the mounting rod drives the second stirring rod to revolve in the double-cone drying cylinder. During the revolution of the second stirring rod, the fixed gear and the movable gear are engaged to drive the second stirring rod to rotate, so that the second stirring blade and the first stirring blade rotate in the opposite direction in the double-cone drying cylinder to stir the material in the double-cone drying cylinder, so that the stirring is more uniform and sufficient, the stirring efficiency is high, and the drying effect of the material is improved.

[0021] The present invention determines the rotation information of the first stirring rod by the actual rotation speed of the first stirring rod and the target rotation speed, and then intelligently adjusts the rotation speed of the stepper motor through the processing module, so that the stirring mechanism can stir the material as smoothly as possible through the intelligent adjustment of the stepper motor.

[0022] The present invention can block the discharge port at the bottom of the double-cone drying cylinder by arranging an anti-material accumulation mechanism at the discharge port at the bottom of the double-cone drying cylinder, thereby preventing some materials from entering the discharge pipe before being stirred and dried, thereby avoiding waste of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a double-cone rotary vacuum dryer for producing a prothioconazole intermediate provided in an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the structure of a stirring mechanism provided in an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the structure of the connection between the sensor module, the stepping motor, the processing module, and the first stirring rod provided in an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the structure of an auxiliary stirring body provided in an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the structure of the material accumulation prevention mechanism provided in an embodiment of the present invention without sealing the material outlet;

[0028] Figure 6 A schematic diagram of the structure of the material accumulation prevention mechanism provided in an embodiment of the present invention sealing the material outlet;

[0029] Figure 7 A schematic diagram of the structure of a baffle mounting base provided by an embodiment of the present invention;

[0030] Figure 8 A schematic structural diagram of a material accumulation prevention mechanism provided in an embodiment of the present invention;

[0031] Fig. 9 for Figure 8 The schematic diagram of the structure after the enlargement of A in the middle;

[0032] The attached drawings are marked as follows: 1-double cone drying cylinder; 10-observation window; 2-support box; 30-stepping motor; 31-first stirring rod; 32-first stirring blade; 33-movable gear; 34-auxiliary stirring body; 35-mounting rod; 36-second stirring rod; 37-second stirring blade; 38-fixed gear; 40-discharge pipe; 41-anti-material accumulation mechanism; 42-fixed plate; 43-discharge port connecting pipe; 44-discharge pipe; 45-action block; 45-threaded rod; 46-hand wheel; 47-discharge port baffle; 470-upper connecting plate; 471-rotating shaft; 472-baffle limiting block; 473-torsion spring limiting block; 474-torsion spring supporting block; 48-baffle mounting seat; 480-lower connecting plate; 481-torsion spring connector; 49-torsion spring. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] like Figure 1-9 As shown, one embodiment of the present invention discloses a double-cone rotary vacuum dryer for producing a prothioconazole intermediate, comprising two symmetrically arranged support boxes 2 and a double-cone drying cylinder 1 rotatably connected between the two support boxes 2; a feed port is arranged at the upper end of the double-cone drying cylinder 1. A transparent observation window 10 is provided on the surface of the double-cone drying cylinder 1;

[0035] The embodiment of the present invention can realize the feeding of materials into the double-cone drying cylinder through the feed port through the above-mentioned arrangement. Since the double-cone dryer is a double-cone rotary tank body, the tank is in a vacuum state, and steam or hot water is introduced into the jacket for heating. The heat contacts the wet material through the inner wall of the tank body, and the water vapor evaporated by the wet material after absorbing heat is pumped away through the vacuum exhaust pipe by the vacuum pump. Since the tank body is in a vacuum state, the drying speed of the material is accelerated, the drying efficiency is improved, and the purpose of uniform drying is achieved. At the same time, by setting a transparent observation window, the material in the double-cone drying cylinder can be observed through the observation window.

[0036] A stirring mechanism is provided in the double-cone drying cylinder 1, and the stirring mechanism includes a stepping motor 30, and the stepping motor 30 is fixedly installed on the outer surface of the double-cone drying cylinder 1 through the mounting plate 11, and a first stirring rod 31 is fixedly installed at the output end of the stepping motor 30, one end of the first stirring rod 31 penetrates the outer surface of the double-cone drying cylinder 31 and enters the inside of the double-cone drying cylinder 1 and is movably installed with the inner wall of the double-cone drying cylinder 1, and a plurality of first stirring blades 32 are fixedly installed on both sides of the outer surface of the first stirring rod 31, and a movable gear 33 is movably installed on the upper part of the first stirring rod 31 through a bearing, and an auxiliary stirring body 34 is provided on the upper part of the first stirring rod 31;

[0037] In this embodiment, the auxiliary stirring body 34 includes a mounting rod 35, which is fixedly mounted on the upper part of the first stirring rod 31, and second stirring rods 36 are movably mounted on both sides of the mounting rod 35. A plurality of second stirring blades 37 are fixedly mounted at equal distances on the left and right sides of the outer surfaces of the two second stirring rods 36, and a fixed gear 38 is fixedly mounted on the upper part of the second stirring rod 37.

[0038] In this embodiment, the two fixed gears 38 are located in the same plane as the movable gear 33 and mesh with each other, and the plurality of second stirring blades 37 and the plurality of first stirring blades 32 are arranged alternately and do not contact each other.

[0039] The embodiment of the present invention can realize the above-mentioned arrangement by starting the stepper motor, and the power output shaft of the stepper motor rotates to drive the first stirring rod to rotate. The rotation of the first stirring rod will drive the mounting rod to rotate, and the mounting rod drives the second stirring rod to revolve in the double-cone drying cylinder. During the revolution of the second stirring rod, the second stirring rod is driven to rotate by itself through the engagement of the fixed gear and the movable gear, so that the second stirring blade and the first stirring blade rotate in the opposite direction in the double-cone drying cylinder to stir the material in the double-cone drying cylinder, thereby making the stirring more uniform and sufficient, making the stirring efficiency high, and improving the effect of drying the material.

[0040] The sensor module is connected to the stepper motor 30 , and the sensor module is connected to the processing module. The sensor module is installed on the stepper motor 30 and can be used to detect the movement of the stepper motor 30 .

[0041] The sensing module here may include: Hall sensor. It is understandable that the Hall sensor is a magnetic field sensor made based on the Hall effect. The advantage of the Hall sensor is that it can measure current and voltage of any waveform, such as: DC, AC, pulse waveform, etc., and even measure transient peaks.

[0042] In the embodiment of the present invention, by installing a Hall sensor on the stepping motor, the high and low level changes of the stepping motor can be accurately detected.

[0043] The processing module here is used to control the stepper motor to perform related acceleration or deceleration operations. The processing module may include one or more processors to execute instructions to complete the corresponding operations. The processing module here may be a single-chip microcomputer, which is used to realize the level signal change of the stepper motor detected by the receiving sensor module; determine the actual speed of the stepper motor according to the level signal change; according to the actual speed and the target speed, the first stirring rod 31 rotation information; and send the first stirring rod 31 rotation information to the stepper motor.

[0044] The processing module is connected to the first stirring rod 31, and is used to receive the level signal change of the motor detected by the sensor module; determine the actual speed of the motor according to the level signal change; determine the rotation information of the first stirring rod 31 according to the actual speed and the target speed; the processing module can count according to the level signal change, and calculate the actual speed of the stepper motor through the total number of counts in a fixed time period.

[0045] It should be noted that the rotation information of the first stirring rod 31 output by the processing module is a simulated rotation signal of the first stirring rod obtained by digital-to-analog conversion. Exemplarily, the simulated rotation signal of the first stirring rod may be a voltage change within a certain voltage range.

[0046] The stepper motor 30 is connected to the processing module, and is used to control the rotation of the stepper motor 30 according to the rotation information of the first stirring rod 31 .

[0047] It should be noted that the rotation direction of the first stirring rod can be adjusted by processing the module output switch signal to control the relay to disconnect to switch the forward and reverse switch of the stepper motor to control the forward and reverse rotation of the stepper motor. Exemplarily, the single-chip microcomputer outputs a switch signal to control the relay to switch the forward and reverse switch of the stepper motor to control the forward and reverse rotation of the stepper motor. The rotation amplitude of the first stirring rod can be adjusted by processing the module output voltage value change. Exemplarily, the rotation amplitude of the first stirring rod can be adjusted by the output voltage value change of the single-chip microcomputer.

[0048] It should be noted that the rotation information of the first stirring rod in the embodiment of the present invention may also include: at least one of the rotation direction, rotation amplitude and rotation speed of the first stirring rod obtained by using the simulated first stirring rod rotation signal.

[0049] In this embodiment, the first stirring rod rotation information is determined according to a first calculated value obtained by calculating a ratio of a difference between an actual rotation speed and a target rotation speed to the target rotation speed.

[0050] It can be understood that the first calculated value calculated by the ratio of the difference between the actual speed and the target speed to the target speed, when the first calculated value is negative, indicates that the first stirring rod needs to be rotated in the reverse direction, and when the first calculated value is positive, indicates that the first stirring rod needs to be rotated in the forward direction. The larger the absolute value of the first calculated value, the greater the difference between the actual speed and the target speed, and the rotation speed or rotation amplitude of the first stirring rod needs to be increased; the smaller the absolute value of the first calculated value, the smaller the difference between the actual speed and the target speed, and the rotation speed or rotation amplitude of the first stirring rod needs to be reduced.

[0051] In an embodiment of the present invention, by calculating the first calculated value, the first stirring rod information can be roughly determined, and the speed of the stepper motor can be adjusted based on the first stirring rod rotation information, so that the stirring mechanism can stir the material as smoothly as possible through intelligent adjustment of the stepper motor.

[0052] In this embodiment, the first stirring rod rotation information is determined according to the first calculated value and the second calculated value obtained by integrating the difference between the actual rotation speed and the target rotation speed for a preset number of statistical times.

[0053] Here, the preset statistical times may be the times from the first statistical times after the current target speed is determined to the current statistical times, so as to obtain the difference integral value between the actual speed and the target speed to the maximum extent, thereby obtaining the first stirring rod rotation information more accurately.

[0054] Of course, in order to reduce the amount of calculation, in some embodiments, the preset statistical number of times may be a preset number, such as ten times, one hundred times, etc., and no limitation is made here.

[0055] In the embodiment of the present invention, not only by calculating the first calculation value but also by the second calculation value, the first stirring rod rotation information can be obtained more accurately compared to the first stirring rod rotation information determined only by the first calculation value, so that the rotation speed of the stepper motor is adjusted based on this more accurate first stirring rod rotation information, so that the stirring mechanism can run as smoothly as possible to better stir the material.

[0056] In this embodiment, the first stirring rod rotation information is determined based on the first calculated value, the second calculated value, and a third calculated value obtained by differentially calculating the current difference between the actual speed and the target speed and the previous difference between the actual speed and the target speed in a preset statistical number of times.

[0057] In the embodiment of the present invention, not only by calculating the first calculation value, but also by the second calculation value and the third calculation value, the first stirring rod rotation information can be obtained more accurately compared to the first stirring rod rotation information determined only by the first calculation value and the second calculation value, so that the speed of the stepper motor is adjusted based on this more accurate first stirring rod rotation information, so that the stirring mechanism can run as smoothly as possible to better stir the material.

[0058] In this embodiment, a discharge pipe 40 is fixedly connected to the discharge port at the bottom of the double-cone drying cylinder 1, and an anti-accumulation mechanism 41 that cooperates with the discharge port at the bottom of the double-cone drying cylinder 1 is installed inside the discharge pipe 40. The discharge pipe 40 includes a discharge port connecting pipe 42 and a lowering pipe 43. The discharge port connecting pipe 42 is vertically arranged, and the lowering pipe 43 is fixed to the bottom end of the discharge port connecting pipe 42. The angle formed by the lowering pipe 43 and the discharge port connecting pipe 42 is an obtuse angle. An action block 44 is arranged at the intersection of the discharge port connecting pipe 42 and the lowering pipe 43; the anti-accumulation mechanism 41 includes a threaded rod 45, a hand wheel 46, a discharge port baffle 47, and a baffle The mounting seat 48 and the torsion spring 49, the handwheel 46 are fixed to the bottom end of the threaded rod 45, the baffle mounting seat 48 is rotatably connected to the top of the threaded rod 45, a lower connecting plate 480 is fixedly provided on the top of the baffle mounting seat 48, an upper connecting plate 470 is fixedly provided on one side of the bottom end of the discharge port baffle 47, the upper connecting plate 470 is rotatably connected to the lower connecting plate 480 through a rotating shaft 471, the torsion spring 49 is sleeved on one side of the rotating shaft 471, the upper end of the torsion spring 49 is fixedly connected to the upper connecting plate 470, the lower end of the torsion spring 49 is fixedly connected to the baffle mounting seat 48, and a baffle limiting block 472 is fixedly provided on one side of the top of the lower connecting plate 480.

[0059] The threaded rod 45 is threadedly connected to the discharge pipe 40 , and the discharge port baffle 37 and the discharge port at the bottom of the double-cone drying cylinder 1 are clearance-matched.

[0060] A torsion spring connector 481 is fixedly provided on one side of the baffle mounting seat 48 , and the lower end of the torsion spring 49 is plugged into the torsion spring connector 481 .

[0061] A torsion spring limiting block 473 is fixedly provided at one end of the rotating shaft 471 , and a torsion spring supporting block 474 is fixedly provided on one side surface of the upper connecting plate 470 .

[0062] The above-mentioned arrangement enables the embodiment of the present invention to realize that the entire anti-material accumulation mechanism can be driven to move up and down by rotating the threaded rod. During the downward movement of the anti-material accumulation mechanism, the discharge port baffle is obstructed by the action block and tilted. At this time, the torsion spring is deformed to store energy. The tilted discharge port baffle can reduce its own obstruction to the flow of materials out of the discharge pipe. When the anti-material accumulation mechanism moves upward, the torsion spring releases energy to drive the discharge port baffle to rotate in the opposite direction, and under the restriction of the baffle restriction block, the discharge port baffle is in a horizontal state. At the same time, since the threaded rod is not coaxial with the discharge port baffle but eccentrically arranged, the discharge port baffle in a horizontal state will not tilt due to the accumulation of raw materials on its top.

[0063] Therefore, the embodiment of the invention can block the discharge port at the bottom of the double-cone drying cylinder by setting an anti-material accumulation mechanism to prevent some materials from entering the discharge pipe without being stirred, resulting in this part of the material not being stirred and dried and unable to be used subsequently, thereby causing waste of this part of the material.

[0064] Finally, it should be noted that the above only describes in detail the specific embodiments of the present invention. However, the present invention is not limited to the specific embodiments described above. Equivalent modifications and substitutions made by those skilled in the art to the present invention are also within the scope of the present invention. Therefore, equal changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of the present invention.

Claims

1. A double-cone rotary vacuum dryer for producing a prothioconazole intermediate, comprising two symmetrically arranged support boxes (2) and a double-cone drying cylinder (1) rotatably connected between the two support boxes (2), characterized in that: A transparent observation window (10) is provided on the surface of the double-cone drying cylinder (1); The double-cone drying cylinder (1) is provided with a stirring mechanism, the stirring mechanism comprising a stepping motor (30), the stepping motor (30) being fixedly mounted on the outer surface of the double-cone drying cylinder (1), the output end of the stepping motor (30) being fixedly mounted with a first stirring rod (31), one end of the first stirring rod (31) passing through the outer surface of the double-cone drying cylinder (31) and entering the inside of the double-cone drying cylinder (1) and being movably mounted with the inner wall of the double-cone drying cylinder (1), a plurality of first stirring blades (32) being fixedly mounted on both left and right sides of the outer surface of the first stirring rod (31), a movable gear (33) being movably mounted on the upper part of the first stirring rod (31) via a bearing, and an auxiliary stirring body (34) being arranged on the upper part of the first stirring rod (31); The sensor module is connected to the stepper motor (30), and the sensor module is connected to the processing module, and is used to detect a change in a level signal of the stepper motor (30); The processing module is connected to the first stirring rod (31) and is used to receive the level signal change of the motor detected by the sensor module; Determining the actual rotation speed of the motor according to the change of the level signal; determining the rotation information of the first stirring rod (31) according to the actual rotation speed and the target rotation speed; The stepper motor (30) is connected to the processing module and is used to control the rotation of the stepper motor (30) according to the rotation information of the first stirring rod (31).

2. The double-cone rotary vacuum dryer for producing a prothioconazole intermediate according to claim 1, characterized in that: The auxiliary stirring body (34) comprises a mounting rod (35), wherein the mounting rod (35) is fixedly mounted on the upper part of the first stirring rod (31), and second stirring rods (36) are movably mounted on both left and right sides of the mounting rod (35), and a plurality of second stirring blades (37) are fixedly mounted on the outer surfaces of the two second stirring rods (36) at equal distances on both left and right sides, and a fixed gear (38) is fixedly mounted on the upper part of the second stirring rod (37).

3. The double cone rotary vacuum dryer for producing a prothioconazole intermediate according to claim 2, characterized in that: The two fixed gears (38) are located on the same plane as the movable gear (33) and mesh with each other, and the plurality of second stirring blades (37) and the plurality of first stirring blades (32) are arranged alternately and do not contact each other.

4. The double cone rotary vacuum dryer for producing a prothioconazole intermediate according to claim 1, characterized in that: The first stirring rod rotation information is determined according to a first calculated value obtained by calculating a ratio of a difference between the actual rotation speed and the target rotation speed to the target rotation speed.

5. The double cone rotary vacuum dryer for producing a prothioconazole intermediate according to claim 4, characterized in that: The first stirring rod rotation information is determined according to the first calculated value and a second calculated value obtained by integrating the difference between the actual rotation speed and the target rotation speed for a preset number of statistical times.

6. The double-cone rotary vacuum dryer for producing a prothioconazole intermediate according to claim 5, characterized in that: The first stirring rod rotation information is determined according to the first calculated value, the second calculated value, and a third calculated value obtained by differentially calculating a current difference between the actual speed and the target speed and a previous difference between the actual speed and the target speed in the preset statistical number of times.

7. The double cone rotary vacuum dryer for producing a prothioconazole intermediate according to claim 1, characterized in that: A discharge pipe (40) is fixedly connected to the discharge port at the bottom of the double-cone drying cylinder (1); an anti-accumulation mechanism (41) that cooperates with the discharge port at the bottom of the double-cone drying cylinder (1) is installed inside the discharge pipe (40); the discharge pipe (40) comprises a discharge port connecting pipe (42) and a lowering pipe (43); the discharge port connecting pipe (42) is vertically arranged; the lowering pipe (43) is fixed to the bottom end of the discharge port connecting pipe (42); the angle formed by the lowering pipe (43) and the discharge port connecting pipe (42) is an obtuse angle; an action block (44) is arranged at the intersection of the discharge port connecting pipe (42) and the lowering pipe (43); the anti-accumulation mechanism (41) comprises a threaded rod (45), a hand wheel (46), a discharge port baffle (47), and a baffle mounting seat ( 48) and a torsion spring (49), the hand wheel (46) is fixed to the bottom end of the threaded rod (45), the baffle mounting seat (48) is rotatably connected to the top end of the threaded rod (45), a lower connecting plate (480) is fixedly arranged on the top of the baffle mounting seat (48), an upper connecting plate (470) is fixedly arranged on one side of the bottom end of the discharge port baffle (47), the upper connecting plate (470) is rotatably connected to the lower connecting plate (480) through a rotating shaft (471), the torsion spring (49) is sleeved on one side of the rotating shaft (471), the upper end of the torsion spring (49) is fixedly connected to the upper connecting plate (470), the lower end of the torsion spring (49) is fixedly connected to the baffle mounting seat (48), and a baffle limiting block (472) is fixedly arranged on one side of the top of the lower connecting plate (480).

8. The double cone rotary vacuum dryer for producing a prothioconazole intermediate according to claim 7, characterized in that: The threaded rod (45) is threadedly connected to the discharge pipe (40), and the discharge port baffle (37) is clearance-matched with the discharge port at the bottom of the double-cone drying cylinder (1).

9. The double cone rotary vacuum dryer for producing a prothioconazole intermediate according to claim 7, characterized in that: A torsion spring plug-in component (481) is fixedly provided on one side of the baffle mounting seat (48), and the lower end of the torsion spring (49) is plugged into the torsion spring plug-in component (481).

10. The double cone rotary vacuum dryer for producing a prothioconazole intermediate according to claim 7, characterized in that: A torsion spring limiting block (473) is fixedly provided at one end of the rotating shaft (471), and a torsion spring supporting block (474) is fixedly provided on one side surface of the upper connecting plate (470).

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