Recycling treatment device for process solvent for preparing topramezone

Abstract

The invention provides a recycling treatment device for a process solvent for preparing topramezone, and relates to the technical field of solvent recycling, the recycling treatment device comprises a main distillation retort, a lower sealing turntable, a first rotating shaft and a second rotating shaft, the lower sealing turntable is rotatably arranged at the bottom of the main distillation retort in the circumferential direction, and the first rotating shaft is rotatably arranged on the inner side of the main distillation retort; an outer heating pipe is arranged at the lower part of the main distillation retort, the top of the main distillation retort is communicated with a liquid inlet pipe and an upper gas outlet, lower sediment holes are formed in two sides of the bottom of the main distillation retort, and a middle cross rod is fixedly arranged at the bottom of the inner side of the main distillation retort. The outer heating pipe provides an outer heat source, the inner heating plate provides an inner heat source, and an inner and outer dual heating mode remarkably improves the heat exchange efficiency of a solvent, so that the temperature of the solvent in the tank is more uniform, and the problems that an existing device adopts a bottom single heat source heating mode for heating, the heating time is long and the heating efficiency is low are solved. And the overall temperature is not balanced due to local overheating.

Description

Technical Field

[0001] The present invention relates to the technical field of solvent recovery equipment, and particularly relates to a recycling treatment device for preparing solvents in the oxaziclomefone process. Background Art

[0002] In the oxaziclomefone preparation process, various solvents such as methanol and ethanol are used. The solvents promote the dissolution of reactants and uniform mixing. The solvents are recycled through a treatment device to reduce waste emissions (such as wastewater containing organic solvents), which meets the requirements of green chemistry and further reduces production costs.

[0003] The recycling treatment device purifies and recovers the solvent through distillation. The existing device uses a single heat source heating method at the bottom for heating, which has a long heating time and is prone to local overheating, resulting in uneven overall temperature. The uniformity of the overall temperature of the solvent is poor, and the non-uniformity of the temperature affects the distillation efficiency. Some solid deposits will also be generated during the evaporation process, and the deposits adhering to the inner wall lead to a large cleaning pressure after each use. Summary of the Invention

[0004] An embodiment of the present disclosure relates to a recycling treatment device for preparing solvents in the oxaziclomefone process. Through the collaborative design of an external heating tube and an internal heating disk, a three-dimensional heating network is constructed. The external heating tube surrounds the lower part of the main distillation tank to provide an external heat source, and the internal heating disk is fixed in the middle of the tank body through a middle cross bar to form an internal heat source. The internal and external dual heating mode significantly improves the heat exchange efficiency of the solvent, reduces the standard deviation of the temperature distribution of the solvent in the tank to within ±2°C, and improves the uniformity by more than 40% compared with the traditional single heat source heating method. The external spiral blade at the lower end of the first rotating shaft drives the solvent to generate a vertical circulation, while the external scraping frame in the middle of the second rotating shaft pushes the solvent to rotate horizontally. This compound flow forms a turbulent effect in the tank, strengthening heat transfer and mass transfer.

[0005] In the first aspect of the present disclosure, there is provided a recycling treatment device for preparing solvents in the oxaziclomefone process, specifically including: a main distillation tank, a lower sealing turntable, a first rotating shaft, and a second rotating shaft. The lower sealing turntable is rotatably arranged circumferentially at the bottom of the main distillation tank, the first rotating shaft is rotatably arranged inside the main distillation tank, the second rotating shaft is rotatably arranged in the middle of the first rotating shaft, a spiral external heating tube is arranged at the lower part of the main distillation tank, a liquid inlet pipe and an upper air outlet are communicated at the top of the main distillation tank, a lower liquid outlet pipe is communicated at the lower part of the main distillation tank and is controlled by a valve for opening and closing, sinking slag holes are opened on both sides of the bottom of the main distillation tank, a middle cross bar is fixedly arranged at the inner bottom of the main distillation tank, and a condensation module is fixedly installed on the outside of the main distillation tank.

[0006] In at least some embodiments, an internal heating disk is fixedly arranged on the upper part of the middle cross bar, the upper air outlet is connected to the condensation module through a pipeline, the condensation module conducts the liquefaction recovery of the solvent vapor, and the lower end of the liquid inlet pipe extends to the middle part inside the main distillation tank.

[0007] In at least some embodiments, slag collection tanks are arranged in an annular array on the lower sealing turntable, and annular array tooth blocks on the outer side of the lower sealing turntable are meshed and connected with a driving worm, and the driving worm is fixedly connected to the main shaft of the first driving motor.

[0008] In at least some embodiments, the lower sealing turntable and the slag collection tank are detachably fixedly connected by screw thread matching, the first driving motor is fixed at the bottom of the main distillation tank, the sealing rubber ring at the top of the slag collection tank is fitted and sealed with the sinking slag hole, and when the slag collection tank is below the sinking slag hole, the slag collection tank and the sinking slag hole are in a communicating state, and the solid matter falls through the sinking slag hole and is deposited in the slag collection tank.

[0009] In at least some embodiments, an outer spiral blade is fixedly arranged on the lower part of the first rotating shaft, the upper end of the first rotating shaft is meshed and connected with the main shaft of the second driving motor through bevel gears, and the second driving motor is fixed on the outer side of the top of the main distillation tank.

[0010] In at least some embodiments, outer scraping frames are fixedly arranged in an annular array in the middle of the second rotating shaft, a lower circular turntable is fixedly arranged at the lower end of the second rotating shaft, and middle leakage holes are arranged through both sides of the lower circular turntable.

[0011] In at least some embodiments, the lower circular turntable and the middle leakage holes are both above the sinking slag hole, the bottom of the outer scraping frame is slidably fitted with the top of the internal heating disk, the bottom of the lower circular turntable is slidably fitted with the inner bottom of the main distillation tank, and the bottom of the middle cross bar is slidably fitted with the top of the lower circular turntable. The middle cross bar pushes the solid sediment on the top of the lower circular turntable to move into the middle leakage holes. The solid sediment inside the middle leakage holes rotates synchronously with the lower circular turntable. When the middle leakage holes are aligned with the sinking slag hole, the solid matter falls through the sinking slag hole and is deposited in the slag collection tank.

[0012] In at least some embodiments, the upper part of the outer scraping frame is rotatably connected to the first rotating shaft, the upper end of the second rotating shaft is meshed and connected with the main shaft of the second driving motor through bevel gears, the second rotating shaft and the first rotating shaft are arranged to rotate in opposite directions. The outer spiral blade at the lower end of the first rotating shaft rotates to drive the solvent to generate a vertical circulation, while the outer scraping frame in the middle of the second rotating shaft rotates synchronously to push the solvent to rotate horizontally, strengthening the heat transfer and mass exchange between the solvents, improving the temperature uniformity of the solvent, and the outer scraping frame is slidably fitted with the inner wall of the main distillation tank.

[0013] The present invention provides a recovery and recycling treatment device for the process solvent of benzobicyclon, having the following beneficial effects: Through the collaborative design of the external heating pipe and the internal heating disk, a dual heating network is constructed. The external heating pipe surrounds the lower part of the main distillation tank to provide an external heat source, while the internal heating disk is fixed in the middle of the tank body through the middle cross bar to form an internal heat source. The dual internal and external heating mode significantly improves the heat exchange efficiency of the solvent, reduces the standard deviation of the solvent temperature distribution in the tank to within ±2°C, and improves the uniformity by more than 40% compared with the traditional single heat source heating method.

[0014] The external spiral blade at the lower end of the first rotating shaft drives the solvent to generate a vertical circulation, while the external scraping frame in the middle of the second rotating shaft pushes the solvent to rotate horizontally. This compound flow forms a turbulent effect in the tank, strengthening heat transfer and mass exchange, effectively avoiding local overheating or temperature stratification, and providing a solid guarantee for the stability of the overall temperature of the solvent during the distillation process.

[0015] The external scraping frame efficiently scrapes off solid residues such as crystals and polymers attached to the inner wall of the main distillation tank. The scraped solid particles settle on the surface of the lower circular turntable under the action of gravity. The middle cross bar pushes the solid sediment on the top of the lower circular turntable to the middle leakage hole. When the middle leakage hole is aligned with the sinking slag hole, the solid matter falls and deposits into the slag collection tank, realizing the continuous collection of the distillation residual solid matter and reducing the cleaning pressure of the distillation residual solid matter inside the main distillation tank.

[0016] The synchronous circumferential rotation of the lower sealing turntable and the slag collection tank realizes the switching of the slag collection tank connected by the sinking slag hole, further reducing the stop waiting time for solvent collection during the replacement of the slag collection tank, eliminating the situation where the slag collection tank can only be replaced after the main distillation tank is emptied, and reducing the waiting situation of the main distillation tank caused by the replacement of the slag collection tank. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0018] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0019] In the drawings: Figure 1 A schematic diagram showing the overall structure of the present application is shown; Figure 2 A schematic diagram showing the semi-sectional structure of the main distillation tank of the present application is shown; Figure 3 A schematic diagram showing the structure of the first rotating shaft of the present application is shown; Figure 4 A schematic diagram showing the structure of the lower sealing turntable of the present application is shown; Figure 5 A schematic diagram showing the structure of the external scraping frame of the present application is shown; Figure 6Shows a schematic structural diagram of the outer spiral blade of the present application; Figure 7 Shows a schematic structural diagram of the lower circular turntable of the present application; Figure 8 Shows a schematic structural diagram of the disassembled state of the present application; List of reference numerals 1. Main distillation tank; 101. External heating tube; 102. Liquid inlet pipe; 103. Upper air outlet; 104. Lower liquid outlet pipe; 105. Lower slag discharge hole; 106. Middle cross bar; 107. Inner heating plate; 108. Condensation module; 2. Lower sealing turntable; 201. Slag collection tank; 202. Driving worm; 203. First driving motor; 3. First rotating shaft; 301. Outer spiral blade; 302. Second driving motor; 4. Second rotating shaft; 401. Outer scraping frame; 402. Lower circular turntable; 403. Middle leakage hole. Detailed implementation manners

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment 1: Please refer to Figures 1 to 8 : The present invention provides a recycling treatment device for the process solvent of topramezone, comprising: a main distillation tank 1, a lower sealing turntable 2, a first rotating shaft 3 and a second rotating shaft 4. A spiral external heating pipe 101 is arranged at the lower part of the main distillation tank 1. A liquid inlet pipe 102 and an upper air outlet 103 are connected and communicated at the top of the main distillation tank 1. A lower liquid outlet pipe 104 is connected and communicated at the lower part of the main distillation tank 1 and is provided with a valve for quick closing control. The lower liquid outlet pipe 104 is used for discharging the residual liquid. Sinking slag holes 105 are opened on both sides of the bottom of the main distillation tank 1. A middle cross bar 106 is fixedly arranged at the inner bottom of the main distillation tank 1. A condensation module 108 is fixedly installed on the outer side of the main distillation tank 1. The lower sealing turntable 2 is rotationally arranged circumferentially at the bottom of the main distillation tank 1. The slag collection tanks 201 are arranged in an annular array on the lower sealing turntable 2. The outer annular array of tooth blocks on the lower sealing turntable 2 is meshed and connected with a driving worm 202. The driving worm 202 is fixedly connected with the main shaft of a first driving motor 203. The lower sealing turntable 2 and the slag collection tank 201 are detachably fixedly connected by a screw fit. The first driving motor 203 is fixed at the bottom of the main distillation tank 1. The top sealing rubber ring of the slag collection tank 201 is fitted and sealed with the sinking slag hole 105. When the slag collection tank 201 is located below the sinking slag hole 105, the slag collection tank 201 and the sinking slag hole 105 are in a communicating state, and the solid matter falls through the sinking slag hole 105 and is deposited in the slag collection tank 201. The lower sealing turntable 2 and the slag collection tank 201 rotate synchronously in the circumferential direction, and the empty slag collection tank 201 replaces the full slag collection tank 201 with deposits, realizing the switching work of the slag collection tank 201 communicated with the sinking slag hole 105, and further reducing the stop waiting time for solvent collection when the slag collection tank 201 is replaced. The first rotating shaft 3 is rotationally arranged inside the main distillation tank 1. An external spiral blade 301 is fixedly arranged at the lower part of the first rotating shaft 3. The upper end of the first rotating shaft 3 is meshed and connected with the main shaft of a second driving motor 302 through a bevel gear. The second driving motor 302 is fixed on the outer side of the top of the main distillation tank 1. The second rotating shaft 4 is rotationally arranged in the middle of the first rotating shaft 3. External scraping frames 401 are fixedly arranged in an annular array in the middle of the second rotating shaft 4. A lower circular turntable 402 is fixedly arranged at the lower end of the second rotating shaft 4. Middle leakage holes 403 are arranged through both sides of the lower circular turntable 402. The external spiral blade 301 at the lower end of the first rotating shaft 3 rotates to drive the solvent to generate a vertical circulation, while the external scraping frames 401 in the middle of the second rotating shaft 4 rotate synchronously to push the solvent to rotate horizontally, strengthening the heat transfer and mass exchange between the solvents and promoting the uniform balance of the temperature between the solvents.

[0022] In the embodiments of the present disclosure, an internal heating plate 107 is fixedly arranged on the upper part of the middle cross bar 106. The internal heating plate 107 is of an annular structure. The upper air outlet 103 is in pipeline communication with the condensation module 108. The condensation module 108 conducts the liquefaction recovery work of the solvent vapor. The lower end of the liquid inlet pipe 102 extends to the middle part of the inner side of the main distillation tank 1. The external heating pipe 101 surrounds the outer side of the lower part of the main distillation tank 1. The external heating pipe 101 provides an external heat source. The internal heating plate 107 is fixed in the middle of the tank body through the middle cross bar 106. The internal heating plate 107 forms an internal heat source, which improves the heat exchange efficiency of the solvent, improves the uniformity of the solvent temperature, reduces the temperature difference of the solvent, and reduces the standard deviation of the solvent temperature distribution in the tank to within ±2°C.

[0023] In the embodiments of the present disclosure, both the lower circular turntable 402 and the middle leakage hole 403 are above the lower slag discharge hole 105. The bottom of the external scraping frame 401 is in sliding fit with the top of the internal heating plate 107. The bottom of the lower circular turntable 402 is in sliding fit with the inner bottom of the main distillation tank 1. The bottom of the middle cross bar 106 is in sliding fit with the top of the lower circular turntable 402. The middle cross bar 106 pushes the solid deposits on the top of the lower circular turntable 402 into the middle leakage hole 403. The solid deposits inside the middle leakage hole 403 rotate synchronously with the lower circular turntable 402. When the middle leakage hole 403 is aligned with the lower slag discharge hole 105, the solids fall through the lower slag discharge hole 105 and are deposited in the slag collection tank 201, realizing the continuous collection work of the distillation residual solids and reducing the cleaning pressure on the distillation residual solids inside the main distillation tank 1.

[0024] In the embodiments of the present disclosure, the upper part of the external scraping frame 401 is rotationally connected to the first rotating shaft 3. The upper end of the second rotating shaft 4 is in meshing connection with the main shaft of the second driving motor 302 through bevel gears. The second rotating shaft 4 and the first rotating shaft 3 are arranged to rotate in opposite directions. The external spiral blade 301 at the lower end of the first rotating shaft 3 rotates to drive the solvent to generate a vertical circulation, while the external scraping frame 401 in the middle of the second rotating shaft 4 rotates synchronously to push the solvent to rotate horizontally, strengthening the heat transfer and mass exchange between the solvents, improving the uniformity of the solvent temperature. The external scraping frame 401 is in sliding fit with the inner wall of the main distillation tank 1. The external scraping frame 401 scrapes the crystalline substances, polymers and other solid residues attached to the inner wall of the main distillation tank 1.

[0025] In Embodiment 2, on the basis of Embodiment 1, the second driving motor 302 simultaneously drives the first rotating shaft 3 and the second rotating shaft 4 to rotate through gear meshing. The second driving motor 302 adjusts the rotation of the first rotating shaft 3 and the second rotating shaft 4 by adjusting the sizes of the driving gears for the first rotating shaft 3 and the second rotating shaft 4. The rotational difference between the first rotating shaft 3 and the second rotating shaft 4 makes the horizontal and vertical flows of the solvent uniform, further ensuring the uniformity and unity of the solvent temperature.

[0026] Working principle of this embodiment: The feed pipe 102 controls the operation of the solvent entering the main distillation tank 1 after the use of the preparation of tembotrione. During the distillation process, the main distillation tank 1 controls the temperature according to the boiling point of the solvent to separate the solvent from high-boiling impurities such as catalyst residues and by-products. The solvent vapor inside the main distillation tank 1 exits through the upper outlet 103 and enters the condensation module 108. The condensation module 108 cools the solvent vapor, usually below the boiling point of the solvent, to condense the vapor into a liquid state. The condensed solvent flows into the collection tank and can be recycled and applied to the next batch of reactions. Examples of the distillation and condensation temperatures of some commonly used solvents in the tembotrione preparation process are as follows: The distillation temperature range of methanol is 65-70 °C, slightly higher than the boiling point, and the condensation temperature of methanol is room temperature or below 60 °C; the distillation temperature range of ethanol is 80-85 °C, and the condensation temperature of methanol is room temperature or below 70 °C; the distillation temperature range of acetonitrile is 82-88 °C, and the condensation temperature of methanol is room temperature or below 75 °C; Through the collaborative design of the external heating pipe 101 and the internal heating disk 107, the main distillation tank 1 constructs a dual internal and external three-dimensional heating network. The external heating pipe 101 surrounds the outer side of the lower part of the main distillation tank 1, and the external heating pipe 101 provides an external heat source. The internal heating disk 107 is fixed in the middle of the tank body through the middle cross bar 106, and the internal heating disk 107 forms an internal heat source. The external heating pipe 101 and the internal heating disk 107 constitute a dual internal and external heating mode, which significantly improves the heat exchange efficiency of the solvent, reduces the standard deviation of the solvent temperature distribution in the tank to within ±2 °C, and improves the uniformity by more than 40% compared with the traditional single heat source heating method. At the same time, the heating speed is increased by more than 40% compared with the traditional single heat source heating method; The second drive motor 302 starts and drives the first rotating shaft 3 and the second rotating shaft 4 to rotate synchronously. The external spiral blade 301 at the lower end of the first rotating shaft 3 rotates to drive the solvent to generate a vertical circulation, while the external scraping frame 401 in the middle of the second rotating shaft 4 rotates synchronously to push the solvent to rotate horizontally. The combined flow of vertical and horizontal synchronization forms a turbulent effect in the tank, strengthening the heat transfer and mass exchange between the solvents, further avoiding the phenomena of local overheating or temperature stratification of the solvent, and providing a solid foundation for the stability of the overall temperature of the solvent during the distillation process. While the external scraping frame 401 rotates, it scrapes the crystalline substances, polymers and other solid residues attached to the inner wall of the main distillation tank 1. The scraped solid particles are deposited on the surface of the lower circular turntable 402 under the action of gravity. The lower circular turntable 402 rotates with the second rotating shaft 4. The middle cross bar 106 does not move. The middle cross bar 106 pushes the solid sediment on the top of the lower circular turntable 402 into the middle leakage hole 403. The solid sediment inside the middle leakage hole 403 rotates synchronously with the lower circular turntable 402. When the middle leakage hole 403 is aligned with the sinking slag hole 105, the solid matter falls through the sinking slag hole 105 and is deposited in the slag collection tank 201, realizing the continuous collection of the distillation residual solid matter, reducing the cleaning pressure of the distillation residual solid matter inside the main distillation tank 1, and also reducing the interference of the distillation residual solid matter on the distillation, such as the situation of causing unstable temperature. Compared with the traditional manual cleaning method, the efficiency is increased by more than 50%, and at the same time, the interference of shutdown cleaning on the production process is avoided.

[0027] The first drive motor 203 drives the drive worm 202 to rotate. The drive worm 202 meshes and drives the lower sealing turntable 2 to rotate circumferentially. The lower sealing turntable 2 and the slag collection tank 201 rotate circumferentially synchronously. Different slag collection tanks 201 are aligned with the sinking slag hole 105 in turn. The empty slag collection tank 201 replaces the full slag collection tank 201, realizing the switching operation of the slag collection tank 201 communicated with the sinking slag hole 105, further reducing the stop waiting time for solvent collection when replacing the slag collection tank 201, eliminating the situation that the slag collection tank 201 can only be replaced after the main distillation tank 1 is emptied, arranging the slag collection tank 201 in advance, extending the replacement cycle of the slag collection tank 201, reducing the waiting times and waiting time of the main distillation tank 1 caused by replacing the slag collection tank 201. The sealing gasket at the top of the slag collection tank 201 forms a sealed connection with the sinking slag hole 105 to ensure that there is no solvent leakage during the rotation and switching process.

[0028] In this article, the following points need to be noted: 1. The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure. Other structures can refer to the general design.

[0029] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0030] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A recycling and treatment device for the process solvent of topramezone, comprising: Main distillation tank (1), lower sealing rotary table (2), first rotating shaft (3) and second rotating shaft (4); it is characterized in that a lower sealing rotary table (2) is rotationally arranged circumferentially at the bottom of the main distillation tank (1), a first rotating shaft (3) is rotationally arranged inside the main distillation tank (1), a second rotating shaft (4) is rotationally arranged in the middle of the first rotating shaft (3), an external heating pipe (101) is arranged at the lower part of the main distillation tank (1), a liquid inlet pipe (102) and an upper air outlet (103) are communicated and arranged at the top of the main distillation tank (1), a lower liquid outlet pipe (104) is communicated and arranged at the lower part of the main distillation tank (1), sinking slag holes (105) are opened on both sides of the bottom of the main distillation tank (1), a middle cross bar (106) is fixedly arranged at the inner bottom of the main distillation tank (1), and a condensation module (108) is fixedly installed on the outside of the main distillation tank (1).

2. The recycling treatment device for preparing the process solvent of benzobicyclon according to claim 1, characterized in that An internal heating disk (107) is fixedly arranged at the upper part of the middle cross bar (106), the upper air outlet (103) and the condensation module (108) are connected by pipelines, and the lower end of the liquid inlet pipe (102) extends to the middle part inside the main distillation tank (1).

3. The recycling treatment device for preparing the process solvent of benzobicyclon according to claim 1, characterized in that Scrap collecting tanks (201) are arranged in an annular array on the lower sealing rotary table (2), a driving worm (202) is meshed and connected to the outside of the lower sealing rotary table (2), and the driving worm (202) is fixedly connected to the main shaft of a first driving motor (203).

4. The recycling treatment device for preparing the process solvent of benzobicyclon according to claim 3, characterized in that The lower sealing rotary table (2) and the scrap collecting tanks (201) are fixedly connected by screw fit, the first driving motor (203) is fixed at the bottom of the main distillation tank (1), and when the scrap collecting tanks (201) are located below the sinking slag holes (105), the scrap collecting tanks (201) and the sinking slag holes (105) are in a communicating state.

5. The recycling treatment device for preparing the process solvent of benzobicyclon according to claim 1, characterized in that An external spiral blade (301) is fixedly arranged at the lower part of the first rotating shaft (3), the upper end of the first rotating shaft (3) and the main shaft of a second driving motor (302) are meshed and connected through bevel gears, and the second driving motor (302) is fixed on the outside of the top of the main distillation tank (1).

6. The recycling treatment device for preparing the process solvent of benzobicyclon according to claim 5, characterized in that External scraping frames (401) are fixedly arranged in an annular array in the middle of the second rotating shaft (4), a lower circular rotary table (402) is fixedly arranged at the lower end of the second rotating shaft (4), and middle leakage holes (403) are arranged through both sides of the lower circular rotary table (402).

7. The recycling treatment device for preparing the process solvent of benzobicyclon according to claim 6, characterized in that The lower circular turntable (402) and the middle leakage hole (403) are both above the sinking slag hole (105). The bottom of the outer scraping frame (401) is in sliding fit with the top of the inner heating plate (107). The bottom of the lower circular turntable (402) is in sliding fit with the inner bottom of the main distillation tank (1). The bottom of the middle cross bar (106) is in sliding fit with the top of the lower circular turntable (402).

8. The recycling treatment device for the process solvent for preparing benzobicyclon according to claim 7, wherein The upper part of the outer scraping frame (401) is rotatably connected to the first rotating shaft (3). The upper end of the second rotating shaft (4) is connected to the main shaft of the second driving motor (302) through a bevel gear meshing connection. The second rotating shaft (4) and the first rotating shaft (3) are arranged to rotate in opposite directions. The outer scraping frame (401) is in sliding fit with the inner wall of the main distillation tank (1).

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