Toluene rectifying tower equipment for bromination of vitamin H

Abstract

The invention discloses methylbenzene rectifying tower equipment for vitamin H bromination and relates to the technical field of rectifying tower equipment. The methylbenzene rectifying tower equipment comprises a rectifying tower body, an air outlet pipe and a connecting pipe are arranged at the top end of the rectifying tower body, the air outlet pipe is connected with the connecting pipe, and the connecting pipe is welded to the top end of the rectifying tower body; the gas outlet pipe and the connecting pipe are used for discharging low-boiling-point liquid; a return pipe is arranged on one side of the rectifying tower main body; the length of the gas channel can be increased, gas exhausted from the gas outlet pipe and the connecting pipe is matched with the boiling point of collected gas, the temperature of the gas exhausted from the connecting pipe is finely adjusted according to the total length change of the fixed inner pipe and the fixed outer pipe, and the efficiency can be improved while it is ensured that the gas at the gas outlet pipe is pure; and the temperature of gas entering the gas outlet pipe can be accurately controlled, a small amount of dust foreign matter in the gas can be treated, and dust accumulated on the collecting plate can be cleaned.

Description

Technical Field

[0001] The present invention relates to the technical field of distillation column equipment, and specifically to a toluene distillation column equipment for vitamin H bromination. Background Art

[0002] During the synthesis or extraction of vitamin H, toluene is usually used as a solvent or reaction medium. In the distillation process, toluene needs to be separated and purified through a distillation column. Plate columns are suitable for separating mixtures with small relative volatility differences. Toluene distillation columns usually use plate columns because they have high mass transfer efficiency and production capacity. The selection of toluene distillation column equipment for vitamin H bromination needs to consider various factors, including separation requirements, equipment type, material selection, operating conditions, etc., to ensure the efficiency of the distillation process and product quality. In the prior art, when the toluene distillation column equipment for vitamin H bromination separates and purifies toluene, since it is necessary to precisely control the outlet gas temperature so that the outlet gas temperature reaches the boiling point temperature of the gas, the temperature of the gas at this place is often inconsistent when passing through the outlet pipe and the connecting pipe, with a slight temperature difference. It is necessary to precisely control the gas temperature at the outlet pipe and the connecting pipe. If the gas temperature entering the connecting pipe is too high, it is likely to cause another substance with a lower boiling point to vaporize. If the gas temperature entering the connecting pipe is too low, the purification efficiency will be low. It is impossible to precisely control the gas temperature entering the connecting pipe. In addition, there is a small amount of dust in the gas moving along with the gas flow, and it is necessary to remove the dust in the gas. Summary of the Invention

[0003] The purpose of the present invention is to provide a toluene distillation column equipment for vitamin H bromination, so as to solve the problems raised in the above background art: Since it is necessary to precisely control the outlet gas temperature so that the outlet gas temperature reaches the boiling point temperature of the gas, the temperature of the gas at this place is often inconsistent when passing through the outlet pipe and the connecting pipe, with a slight temperature difference. It is necessary to precisely control the gas temperature at the outlet pipe and the connecting pipe. If the gas temperature entering the connecting pipe is too high, it is likely to cause another substance with a lower boiling point to vaporize. If the gas temperature entering the connecting pipe is too low, the purification efficiency will be low. It is impossible to precisely control the gas temperature entering the connecting pipe.

[0004] The purpose of the present invention can be achieved through the following technical solutions: A toluene rectification tower device for vitamin H bromination, comprising a rectification tower main body. An air outlet pipe and a connecting pipe are arranged at the top of the rectification tower main body, and the air outlet pipe is connected to the connecting pipe, and the connecting pipe is welded to the top of the rectification tower main body. The air outlet pipe and the connecting pipe are used to discharge low-boiling-point liquids. A reflux pipe is arranged on one side of the rectification tower main body. A tray is arranged inside the rectification tower main body and below the reflux pipe. A diversion structure is arranged at the inner top of the rectification tower main body. The diversion structure includes a fixed inner pipe, and the fixed inner pipe is integrally manufactured with the bottom end of the connecting pipe. A fixed outer pipe is sleeved on the lower end of the fixed inner pipe. A ring-shaped filter plate is welded to the inner top of the rectification tower main body. The filter plate is used to filter impurities in the gas at the top of the rectification tower main body. An outer fixing sleeve is arranged at the lower end of the filter plate, and the filter plate is embedded and installed at the top of the outer fixing sleeve. A plurality of air inlet grooves are opened at the top of the outer fixing sleeve. The air inlet grooves are used for gaseous substances to enter the inside of the outer fixing sleeve. The airflow inside the rectification tower main body flows along the inside of the air inlet grooves and the inside of the fixed outer pipe. The total length change of the fixed inner pipe and the fixed outer pipe is used to slightly adjust the temperature of the gas discharged at the connecting pipe.

[0005] As a preferred technical solution of the present invention, there is an interference fit between the fixed outer pipe and the fixed inner pipe. Fixed pins are opened at the bottom end of the filter plate and the upper end of the outer fixing sleeve, and the filter plate is fixed to the outer fixing sleeve through the fixed pins.

[0006] As a preferred technical solution of the present invention, a closing structure is arranged between the fixed inner pipe and the fixed outer pipe. The closing structure includes two driving motors, and the two driving motors are installed at the top of the rectification tower main body. Fixed shafts are arranged at the output ends of the two driving motors. A fixing plate is sleeved between the two fixed shafts, and the fixing plate is integrally manufactured with the fixed outer pipe. The lower end of the fixed shaft is threadedly connected to both sides of the fixing plate. The cooperation between the fixed shaft and the fixing plate is used to adjust the position of the fixing plate. The fixed outer pipe is slidably connected to the fixed inner pipe, and the position change of the fixed inner pipe and the fixed outer pipe changes the length of the airflow path inside the air inlet grooves and the fixed outer pipe.

[0007] As a preferred technical solution of the present invention, threaded sleeves are arranged on both sides of the air inlet groove, and mating threads are arranged on the outer part of the lower end of the fixed shaft, and the mating threads are threadedly connected to the threaded sleeves.

[0008] As a preferred technical solution of the present invention, two connection holes are opened at the bottom end of the fixed inner pipe, and the two connection holes pass through the cross-sectional diameter of the fixed inner pipe. Connection pins are connected inside the two connection holes. A sealing plate is welded between the two connection pins and inside the fixed inner pipe. The cross-section of the sealing plate is adapted to the cross-section of the fixed inner pipe. Gears are arranged at the ends of the two connection pins, and the two gears rotate synchronously with the sealing plate. Two sliding grooves arranged vertically are opened on the inner wall of the fixed outer pipe, and mating teeth are arranged inside the two sliding grooves and on the same side of the two gears. The two mating teeth are respectively meshed with the two gears.

[0009] As a preferred technical solution of the present invention, the shape of the sliding groove is a stepped groove, and the end of the connecting pin is located inside the narrow end of the sliding groove. The connecting pin is slidably connected inside the sliding groove, and the gear is located inside the wide end of the sliding groove.

[0010] As a preferred technical solution of the present invention, the edge of the sealing plate is rounded, and the edge of the sealing plate matches the inner wall of the fixed inner tube. The rotation angle of the sealing plate is 180°, and the rotation of the sealing plate is used to open and close the air flow channel of the fixed inner tube.

[0011] As a preferred technical solution of the present invention, impurity removal structures are provided at the inner top of the rectification tower main body and outside the fixed inner tube. The impurity removal structure includes a fixing ring sleeved outside the fixed inner tube. Two mating racks are welded to the bottom end of the fixing ring. The two mating racks are respectively aligned with the two sliding grooves, and the two mating racks are respectively engaged with the two gears. The fixing ring is slidably connected to the fixed inner tube. A collecting plate is provided at the bottom end of the fixing ring. An ionization electrode plate is installed at the inner top of the rectification tower main body, and the ionization electrode plate corresponds to the position of the collecting plate. Dust collection is carried out by ionizing the gas using an electrostatic field so that dust particles are charged and adsorbed onto the electrode.

[0012] As a preferred technical solution of the present invention, the shapes of the collecting plate and the ionization electrode plate are both sleeve-shaped, and the axis of the collecting plate is adapted to the axis of the ionization electrode plate. The height of the ionization electrode plate is greater than the height of the collecting plate.

[0013] As a preferred technical solution of the present invention, a reserved groove is provided at the top edge of the fixed outer tube, the reserved groove is aligned with the bottom end of the collecting plate, and the inside of the reserved groove is slidably connected to the bottom end of the collecting plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are: A diversion structure is provided, and a return channel is formed between the outer fixing sleeve, the fixed outer tube and the outer fixing sleeve, so as to increase the length of the gas channel, and the gas discharged from the air outlet pipe and the connecting pipe is adapted to the boiling point of the collected gas; The fixed inner tube is slidably connected to the fixed outer tube, and the total length of the fixed inner tube and the fixed outer tube changes to slightly adjust the temperature of the gas discharged from the connecting pipe, ensuring the purity of the gas at the air outlet pipe while improving the efficiency; A closing structure is provided. By threadedly connecting the fixed shaft and the fixing plate, the relative positions of the fixed inner tube and the fixed outer tube can be precisely adjusted, so that the temperature of the gas entering the air outlet pipe can be precisely controlled; by opening and closing the sealing plate, the sealing plate can be controlled to open and close by a driving motor, and the air flow channel can be closed when gas flow is not required; The impurity removal structure and the closing structure cooperate with each other, and the collecting plate and the ionization electrode plate cooperate with each other, so that a small amount of dust and foreign matters in the gas can be processed. When cleaning the dust inside the outer fixing sleeve, the dust accumulated on the collecting plate is cleaned by the gear meshing with the mating teeth and the mating rack. Brief Description of the Drawings

[0015] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 It is the main structure diagram of a toluene rectification tower device for vitamin H bromination according to the present invention; Figure 2 It is a schematic diagram of the interior of the rectification tower main body of a toluene rectification tower device for vitamin H bromination according to the present invention; Figure 3 It is a schematic diagram of the diversion structure of a toluene rectification tower device for vitamin H bromination according to the present invention; Figure 4 It is a schematic diagram of the air flow circulation inside the outer fixing sleeve of a toluene rectification tower device for vitamin H bromination according to the present invention; Figure 5 It is a schematic diagram of the closing structure of a toluene rectification tower device for vitamin H bromination according to the present invention; Figure 6 It is a schematic diagram of the position change of the fixed inner tube and the fixed outer tube of a toluene rectification tower device for vitamin H bromination according to the present invention; Figure 7 It is a schematic diagram of the sealing plate of a toluene rectification tower device for vitamin H bromination according to the present invention; Figure 8 It is a schematic diagram of the gear of a toluene rectification tower device for vitamin H bromination according to the present invention; Figure 9 It is a schematic diagram of the impurity removal structure of a toluene rectification tower device for vitamin H bromination according to the present invention.

[0017] In the figure: 1. Rectification tower main body; 2. Air outlet pipe; 3. Connecting pipe; 4. Diversion structure; 41. Fixed inner tube; 42. Fixed outer tube; 43. Outer fixing sleeve; 44. Air inlet groove; 45. Filter plate; 46. Fixed pin; 5. Tray; 6. Closing structure; 61. Driving motor; 62. Fixed shaft; 63. Matching thread; 64. Fixed plate; 65. Thread sleeve; 66. Connecting hole; 67. Sliding groove; 68. Sealing plate; 69. Connecting pin; 610. Matching teeth; 611. Gear; 7. Impurity removal structure; 71. Fixed ring; 72. Collecting plate; 73. Matching rack; 74. Ionization electrode plate; 75. Reserved groove; 8. Return pipe. Detailed Embodiments

[0018] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention. Embodiment 1

[0019] Please refer to Figures 1-4 As shown, a toluene rectification tower device for vitamin H bromination includes a rectification tower main body 1. An air outlet pipe 2 and a connecting pipe 3 are arranged at the top of the rectification tower main body 1, and the air outlet pipe 2 is connected to the connecting pipe 3, and the connecting pipe 3 is welded to the top of the rectification tower main body 1. The air outlet pipe 2 and the connecting pipe 3 are used to discharge low-boiling liquids. High-boiling liquids or liquefied liquids flow downward along the inner wall of the rectification tower main body 1. A reflux pipe 8 is arranged on one side of the rectification tower main body 1. A tray 5 is arranged inside the rectification tower main body 1 and below the reflux pipe 8. Gaseous substances rise through the tray 5, and liquid substances are collected on the surface of the tray 5 and drip below the tray 5. A guiding structure 4 is arranged at the top inside the rectification tower main body 1. The guiding structure 4 includes a fixed inner pipe 41, and the fixed inner pipe 41 is integrally manufactured with the bottom end of the connecting pipe 3. A fixed outer pipe 42 is sleeved at the lower end of the fixed inner pipe 41, and the fixed inner pipe 41 and the fixed outer pipe 42 are sleeved with each other, so that the fixed outer pipe 42 rises or descends along the fixed inner pipe 41. A ring-shaped filter plate 45 is welded to the top inside the rectification tower main body 1. The filter plate 45 is used to filter impurities in the gas at the top of the rectification tower main body 1. An outer fixing sleeve 43 is arranged at the lower end of the filter plate 45, and the filter plate 45 is embedded in the top of the outer fixing sleeve 43. The outer fixing sleeve 43 preliminarily separates the air at the top of the rectification tower main body 1. A plurality of air inlet grooves 44 are opened at the top of the outer fixing sleeve 43. The air inlet grooves 44 are used for gaseous substances to enter the inside of the outer fixing sleeve 43. A water permeable hole is opened at the bottom end of the outer fixing sleeve 43. Some liquefied gases flow out from the bottom end of the outer fixing sleeve 43 to avoid liquid staying inside the outer fixing sleeve 43. The airflow inside the rectification tower main body 1 flows along the inside of the air inlet grooves 44 and the inside of the fixed outer pipe 42. The liquid is vaporized after being heated to a certain temperature, so that the temperature at the air outlet pipe 2 and the connecting pipe 3 reaches the boiling point of a distillation substance with a relatively low boiling point. The lower gaseous substances enter the inside of the outer fixing sleeve 43 from the air inlet grooves 44, then enter the inside of the fixed outer pipe 42 and the fixed inner pipe 41 from the inside of the outer fixing sleeve 43, and then are discharged from the connecting pipe 3 and the air outlet pipe 2. The airflow channel is arranged in an S shape, and the total length of the fixed inner pipe 41 and the fixed outer pipe 42 changes to slightly adjust the temperature of the gas discharged at the connecting pipe 3.

[0020] Please refer to Figure 3 and Figure 4As shown, there is an interference fit between the fixed outer tube 42 and the fixed inner tube 41, which can change the relative positions of the fixed inner tube 41 and the fixed outer tube 42, thereby changing the lengths of the fixed inner tube 41 and the fixed outer tube 42. Fixed pins 46 are provided at the bottom end of the filter plate 45 and the upper end of the outer fixing sleeve 43. The filter plate 45 is fixed to the outer fixing sleeve 43 through the fixed pins 46. The outer fixing sleeve 43 is fixed to the filter plate 45 to filter impurities in some gaseous substances, ensuring that the gaseous substances entering the fixed inner tube 41 and the fixed outer tube 42 are relatively clean.

[0021] It should be noted that the main body 1 of the distillation column heats two liquids with different boiling points. The liquid with the lower boiling point is first discharged from the gas outlet pipe 2 and the connecting pipe 3, and the liquid with the lower boiling point remains inside the main body 1 of the distillation column. The liquid is vaporized after being heated to a certain temperature, so that the temperature at the gas outlet pipe 2 and the connecting pipe 3 reaches the boiling point of a distillation substance with a relatively lower boiling point. The lower gaseous substance enters the inside of the outer fixing sleeve 43 from the air inlet groove 44, and then enters the inside of the fixed outer tube 42 and the fixed inner tube 41 from the inside of the outer fixing sleeve 43. Then the gas is discharged from the connecting pipe 3 and the gas outlet pipe 2. The flow channel of the gas flow is arranged in an S shape, and the total length of the fixed inner tube 41 and the fixed outer tube 42 changes to slightly adjust the temperature of the gas discharged at the connecting pipe 3.

[0022] Please refer to Figure 2 、 Figures 5-8As shown, a closing structure 6 is provided between the fixed inner tube 41 and the fixed outer tube 42. The closing structure 6 includes two sets of driving motors 61. The two sets of driving motors 61 are installed at the top of the rectification tower main body 1. The driving motors 61 are installed at the top of the rectification tower main body 1 by bolts, and fixed shafts 62 are provided at the output ends of the two sets of driving motors 61. The fixed shafts 62 are inserted into the interior of the rectification tower main body 1. A fixing plate 64 is sleeved between the two fixed shafts 62, and the fixing plate 64 is integrally manufactured with the fixed outer tube 42. The lower ends of the fixed shafts 62 are threadedly connected to both sides of the fixing plate 64. The cooperation between the fixed shafts 62 and the fixing plate 64 is used to adjust the position of the fixing plate 64. The fixed outer tube 42 is slidably connected to the fixed inner tube 41. The change in the positions of the fixed inner tube 41 and the fixed outer tube 42 changes the length of the gas flow path inside the air inlet groove 44 and the fixed outer tube 42. The threaded connection between the fixed shafts 62 and the fixing plate 64 enables the fixing plate 64 to move up and down. The fixing plate 64 drives the fixed outer tube 42 to be slidably connected to the fixed inner tube 41. The change in the lengths of the fixed inner tube 41 and the fixed outer tube 42 can change the gas temperature at the outlet pipe 2 and the connecting pipe 3. When the gas temperature at the outlet pipe 2 and the connecting pipe 3 is slightly lower than the boiling point temperature, the fixed outer tube 42 can be raised to shorten the channel, so that the gas reaching the outlet pipe 2 and the connecting pipe 3 remains a gas. When the gas temperature at the outlet pipe 2 and the connecting pipe 3 is slightly higher than the boiling point temperature, another liquid substance is also likely to volatilize to the connecting pipe 3. The fixed outer tube 42 can be raised to lengthen the channel, so that only one kind of gas will reach the outlet pipe 2 and the connecting pipe 3, ensuring the purity of the gas at the outlet pipe 2 and improving the efficiency at the same time.

[0023] Please refer to Figure 5 and Figure 6 As shown, threaded sleeves 65 are provided on both sides of the air inlet groove 44. A mating thread 63 is provided on the outer part of the lower end of the fixed shaft 62. The mating thread 63 is threadedly connected to the threaded sleeve 65. By driving the fixed shaft 62 with the driving motor 61, the position of the fixing plate 64 is changed. The mating thread 63 and the threaded sleeve 65 can better and precisely control the position of the fixing plate 64, thereby changing the path of the gas substance entering the fixed outer tube 42.

[0024] Please refer to Figure 7 and Figure 8As shown in the figure, two connection holes 66 are opened at the bottom end of the fixed inner tube 41. The two connection holes 66 pass through the cross-sectional diameter of the fixed inner tube 41. Connection pins 69 are connected inside both of the two connection holes 66. The connection holes 66 are rotatably connected to the connection pins 69. A sealing plate 68 is welded between the two connection pins 69 and inside the fixed inner tube 41. The cross-section of the sealing plate 68 is adapted to the cross-section of the fixed inner tube 41. The sealing plate 68 can rotate inside the fixed inner tube 41. Gear 611 is provided at the end of each of the two connection pins 69. The two gears 611 rotate synchronously with the sealing plate 68. Two sliding grooves 67 arranged vertically are opened on the inner wall of the fixed outer tube 42. Engagement teeth 610 are provided inside the two sliding grooves 67 and on the same side of the two gears 611. The two engagement teeth 610 are respectively meshed with the two gears 611. When the fixing plate 64 moves up and down, it drives the fixed inner tube 41 and the fixed outer tube 42 to approach or move away from each other. At this time, the engagement teeth 610 inside the sliding grooves 67 are meshed with the gears 611. Thus, the rotation of the gears 611 drives the sealing plate 68 to rotate. The sealing plate 68 and the fixed inner tube 41 can be in a closed state and an open state. Thus, the opening and closing state of the fixed inner tube 41 controls the gas flow situation at the fixed inner tube 41.

[0025] Please refer to Figure 6 and Figure 7 As shown in the figure, the shape of the sliding groove 67 is a stepped groove, and the end of the connection pin 69 is located inside the narrow end of the sliding groove 67. The connection pin 69 is slidably connected inside the sliding groove 67. The two connection pins 69 are respectively located inside the two sliding grooves 67. Thus, the connection pin 69 is restricted inside the narrow end of the sliding groove 67, and the gear 611 is located inside the wide end of the sliding groove 67. The gear 611 rotates freely inside the wide end of the sliding groove 67, without affecting the rotation of the gear 611 while moving up and down inside the sliding groove 67.

[0026] Please refer to Figure 8 As shown in the figure, the edge of the sealing plate 68 is chamfered, and the edge of the sealing plate 68 matches the inner wall of the fixed inner tube 41. The chamfered sealing plate 68 can rotate normally inside the fixed inner tube 41. The rotation angle of the sealing plate 68 is 180°. The rotation of the sealing plate 68 is used to open and close the air flow channel of the fixed inner tube 41. When the sealing plate 68 is in a horizontal state, the gas state inside the fixed inner tube 41 is in a cut-off state. When the sealing plate 68 is inclined, the gas state inside the fixed inner tube 41 is in an open state.

[0027] It should be noted that when the gas temperature at the air outlet pipe 2 and the connecting pipe 3 is slightly lower than the boiling point temperature, the fixed outer pipe 42 can be lifted to shorten the channel, so that the gas reaching the air outlet pipe 2 and the connecting pipe 3 remains a gas. When the gas temperature at the air outlet pipe 2 and the connecting pipe 3 is slightly higher than the boiling point temperature, another liquid substance may also volatilize to the connecting pipe 3. The fixed outer pipe 42 can be lifted to lengthen the channel, so that only one kind of gas will reach the air outlet pipe 2 and the connecting pipe 3, ensuring the purity of the gas at the air outlet pipe 2 and improving the efficiency at the same time. The cooperation of the thread 63 and the thread sleeve 65 can better accurately control the position of the fixing plate 64, so as to change the path of the gas substance entering the fixed outer pipe 42. The sealing plate 68 and the fixed inner pipe 41 can be in a closed state and an open state, so as to control the gas flow situation at the fixed inner pipe 41 by the opening and closing state of the fixed inner pipe 41.

[0028] Please refer to Figure 2 and Figure 9 As shown, an impurity removal structure 7 is provided at the inner top of the rectifying tower main body 1 and outside the fixed inner pipe 41. The impurity removal structure 7 includes a fixing ring 71. The fixing ring 71 is sleeved outside the fixed inner pipe 41. Two matching racks 73 are welded to the bottom end of the fixing ring 71. The two matching racks 73 are respectively aligned with the two sliding grooves 67. The matching racks 73 move along the vertical direction, and the two matching racks 73 are respectively engaged with the two gears 611. The fixing ring 71 is slidably connected to the fixed inner pipe 41. The engagement of the matching rack 73 and the gear 611 enables both the collection plate 72 and the fixing ring 71 to be lifted and lowered. A collection plate 72 is provided at the bottom end of the fixing ring 71. An ionization plate 74 is installed at the inner top of the rectifying tower main body 1. The air flow can pass through the air permeable holes of the ionization plate 74, and the ionization plate 74 corresponds to the position of the collection plate 72. The ionization plate 74 is powered on to ionize the gas by using an electrostatic field, so that the dust particles are charged and adsorbed onto the electrode for dust collection. The gas enters the inner part of the outer fixing sleeve 43 from the air inlet groove 44. At this time, it is ionized by the ionization plate 74, so that the dust or impurities in the gas are collected by the collection plate 72, ensuring that the gas entering the fixed outer pipe 42 and the fixed inner pipe 41 is relatively clean.

[0029] Please refer to Figure 9As shown, the shapes of both the collection plate 72 and the ionization electrode plate 74 are sleeve-shaped, and the axis of the collection plate 72 is adapted to the axis of the ionization electrode plate 74. The height of the ionization electrode plate 74 is greater than that of the collection plate 72. The position of the collection plate 72 changes so that the collection plate 72 always corresponds to the fixed ring 71, without affecting the removal of dust and impurities by the ionization electrode plate 74 and the collection plate 72. A reserved groove 75 is provided at the top edge of the fixed outer tube 42. The reserved groove 75 is aligned with the bottom end of the collection plate 72, and the inside of the reserved groove 75 is slidably connected to the bottom end of the collection plate 72. When cleaning the inside of the outer fixing sleeve 43 later, the fixed outer tube 42 can be moved upward. At this time, the collection plate 72 can be inserted into the reserved groove 75 of the fixed outer tube 42, and the accumulated dust and foreign objects can be scraped to facilitate the cleaning of the dust on the collection plate 72.

[0030] It should be noted that the ionization electrode plate 74 is powered on to collect dust by using an electrostatic field to ionize the gas so that dust particles are charged and adsorbed onto the electrode. The air is ionized by the ionization electrode plate 74, so that the dust or impurities in the gas are collected by the collection plate 72, ensuring that the gas entering the fixed outer tube 42 and the fixed inner tube 41 is relatively clean. When cleaning the inside of the outer fixing sleeve 43 later, the fixed outer tube 42 can be moved upward. At this time, the collection plate 72 can be inserted into the reserved groove 75 of the fixed outer tube 42, and the accumulated dust and foreign objects can be scraped to facilitate the cleaning of the dust on the collection plate 72.

[0031] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific embodiments. Obviously, according to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A toluene distillation tower device for vitamin H bromination, comprising a distillation tower body (1), wherein a gas outlet pipe (2) and a connecting pipe (3) are arranged at the top of the distillation tower body (1), and the gas outlet pipe (2) is connected to the connecting pipe (3), and the connecting pipe (3) is welded to the top of the distillation tower body (1), and the gas outlet pipe (2) and the connecting pipe (3) are used to discharge low-boiling-point liquid, a reflux pipe (8) is arranged on one side of the distillation tower body (1), and a tower plate (5) is arranged inside the distillation tower body (1) and below the reflux pipe (8), characterized in that: The top of the interior of the distillation tower body (1) is provided with a flow guiding structure (4), the flow guiding structure (4) comprising a fixed inner tube (41), the fixed inner tube (41) and the bottom end of the connecting tube (3) being manufactured in one piece, the lower end of the fixed inner tube (41) being sleeved with a fixed outer tube (42), the top of the interior of the distillation tower body (1) being welded with an annular filter plate (45), the filter plate (45) being used to filter impurities in the gas at the top of the distillation tower body (1), the lower end of the filter plate (45) being provided with an outer fixed sleeve (43), and the filter plate (45) is embedded in the top of the outer fixed sleeve (43). The top of the outer fixed sleeve (43) is provided with a plurality of air inlet grooves (44). The air inlet grooves (44) are used for gaseous substances to enter the interior of the outer fixed sleeve (43). The air flow inside the rectification tower body (1) flows along the interior of the air inlet grooves (44) and the interior of the fixed outer tube (42). The total length of the fixed inner tube (41) and the fixed outer tube (42) is changed to slightly adjust the exhaust gas temperature at the connecting pipe (3).

2. A toluene distillation tower device for vitamin H bromination according to claim 1, characterized in that: The fixed outer tube (42) and the fixed inner tube (41) are transitionally matched, and a fixing pin (46) is provided at the bottom end of the filter plate (45) and the upper end of the outer fixing sleeve (43), and the filter plate (45) is fixed to the outer fixing sleeve (43) via the fixing pin (46).

3. A toluene distillation tower device for vitamin H bromination according to claim 2, characterized in that: A closed structure (6) is provided between the fixed inner tube (41) and the fixed outer tube (42). The closed structure (6) comprises two groups of drive motors (61). The two groups of drive motors (61) are installed at the top of the distillation tower body (1). The output ends of the two groups of drive motors (61) are both provided with fixed shafts (62). A fixed plate (64) is sleeved between the two fixed shafts (62). The fixed plate (64) and the fixed outer tube (42) are manufactured as one piece. The lower end of the fixed shaft (62) is threadedly connected to the two sides of the fixed plate (64). The cooperation between the fixed shaft (62) and the fixed plate (64) is used to adjust the position of the fixed plate (64). The fixed outer tube (42) is slidably connected to the fixed inner tube (41). The position of the fixed inner tube (41) and the fixed outer tube (42) changes, thereby changing the length of the airflow path inside the air inlet groove (44) and the fixed outer tube (42).

4. A toluene distillation tower device for vitamin H bromination according to claim 3, characterized in that: Threaded sleeves (65) are provided on both sides of the air inlet groove (44), and a matching thread (63) is provided on the outside of the lower end of the fixed shaft (62), and the matching thread (63) is threadedly connected to the threaded sleeve (65).

5. A toluene distillation tower device for vitamin H bromination according to claim 4, characterized in that: The bottom end of the fixed inner tube (41) is provided with two connection holes (66), the two connection holes (66) pass through the cross-sectional diameter of the fixed inner tube (41), the two connection holes (66) are connected with connection pins (69) inside, a sealing plate (68) is welded between the two connection pins (69) and inside the fixed inner tube (41), the cross-section of the sealing plate (68) is matched with the cross-section of the fixed inner tube (41), the ends of the two connection pins (69) are provided with gears (611), the two gears (611) and the sealing plate (68) rotate synchronously, the inner wall of the fixed outer tube (42) is provided with two sliding grooves (67) arranged in a vertical direction, matching teeth (610) are provided inside the two sliding grooves (67) and on the same side of the two gears (611), and the two matching teeth (610) are respectively meshed with the two gears (611).

6. A toluene distillation tower device for vitamin H bromination according to claim 5, characterized in that: The sliding groove (67) is in the shape of a stepped groove, and the end of the connecting pin (69) is located inside the narrow end of the sliding groove (67), the connecting pin (69) is located inside the sliding groove (67) for sliding connection, and the gear (611) is located inside the wide end of the sliding groove (67).

7. A toluene distillation tower device for vitamin H bromination according to claim 5, characterized in that: The edges of the sealing plate (68) are chamfered, and the edges of the sealing plate (68) match the inner wall of the fixed inner tube (41). The rotation angle of the sealing plate (68) is 180°. The rotation of the sealing plate (68) is used to open and close the air flow channel of the fixed inner tube (41).

8. A toluene distillation tower device for vitamin H bromination according to claim 7, characterized in that: An impurity removal structure (7) is provided at the top of the interior of the distillation tower body (1) and the exterior of the fixed inner tube (41). The impurity removal structure (7) comprises a fixed ring (71). The fixed ring (71) is sleeved on the exterior of the fixed inner tube (41). Two matching racks (73) are welded to the bottom end of the fixed ring (71). The two matching racks (73) are respectively aligned with the two sliding grooves (67), and the two matching racks (73) are respectively meshed with the two gears (611). The fixed ring (71) is slidably connected to the fixed inner tube (41). A collecting plate (72) is provided at the bottom end of the fixed ring (71). An ionization electrode plate (74) is installed at the top of the interior of the distillation tower body (1), and the ionization electrode plate (74) corresponds to the collecting plate (72). The gas is ionized by using an electrostatic field so that dust particles are electrically adsorbed on the electrode for dust collection.

9. A toluene distillation tower device for vitamin H bromination according to claim 8, characterized in that: The shape of the collecting plate (72) and the shape of the ionizing plate (74) are both sleeve-shaped, and the axis of the collecting plate (72) matches the axis of the ionizing plate (74), and the height of the ionizing plate (74) is greater than the height of the collecting plate (72).

10. A toluene distillation tower device for vitamin H bromination according to claim 8, characterized in that: A reserved groove (75) is provided at the top edge of the fixed outer tube (42), the reserved groove (75) is aligned with the bottom end of the collecting plate (72), and the inside of the reserved groove (75) is slidably connected to the bottom end of the collecting plate (72).

Images