A toluene distillation tower equipment for vitamin H bromination

Abstract

The invention discloses a toluene distillation tower device for vitamin H bromination, relating to the technical field of distillation tower devices. The device comprises a distillation tower main body, wherein a gas outlet pipe and a connecting pipe are provided at the top of the distillation tower main body, the gas outlet pipe is connected to the connecting pipe, and the connecting pipe is welded to the top of the distillation tower main body, the gas outlet pipe and the connecting pipe are used to discharge low-boiling-point liquid, and a reflux pipe is provided on one side of the distillation tower main body. The device can increase the length of a gas channel, adapt the boiling point of the gas discharged from the gas outlet pipe and the connecting pipe to that of the collected gas, slightly adjust the temperature of the gas discharged at the connecting pipe by changing the total length of the fixed inner pipe and the fixed outer pipe, ensure the purity of the gas at the gas outlet pipe while improving efficiency, accurately control the temperature of the gas entering the gas outlet pipe, process a small amount of dust and foreign matter in the gas, and clean the dust accumulated on the collection plate.

Description

Technical Field

[0001] The invention relates to the technical field of distillation tower equipment, in particular to a toluene distillation tower equipment for vitamin H bromination. Background Art

[0002] In the synthesis or extraction process of vitamin H, toluene is usually used as a solvent or reaction medium. During the distillation process, toluene needs to be separated and purified by a distillation tower. Plate towers are suitable for separating mixtures with small relative volatility differences. Plate towers are usually used as toluene distillation towers because they have high mass transfer efficiency and production capacity. The selection of toluene distillation tower equipment for vitamin H bromination needs to consider many factors, including separation requirements, equipment type, material selection, operating conditions, etc., to ensure the efficiency of the distillation process and product quality.

[0003] In the prior art, when toluene is separated and purified by a toluene distillation tower device for vitamin H bromination, the outlet temperature needs to be precisely controlled so that the outlet temperature reaches the boiling point of the gas. Often, the temperature of the gas passing through the outlet pipe and the connecting pipe is inconsistent, and there is a slight temperature difference. The gas temperature at the outlet pipe and the connecting pipe needs to be precisely controlled. The higher temperature of the gas entering the connecting pipe easily causes another substance with a lower boiling point to be vaporized. The lower temperature of the gas entering the connecting pipe leads to lower purification efficiency. The gas temperature entering the connecting pipe cannot be precisely controlled. In addition, a small amount of dust exists in the gas and moves with the airflow, and the dust in the gas needs to be removed. Summary of the Invention

[0004] The object of the present invention is to provide a toluene distillation tower device for vitamin H bromination, so as to solve the problem raised in the above background technology: since it is necessary to accurately control the temperature of the gas outlet so that the temperature of the gas outlet reaches the boiling point of the gas, the temperature of the gas at this location is often inconsistent when passing through the gas outlet pipe and the connecting pipe, and there is a slight temperature difference. It is necessary to accurately control the gas temperature at the gas outlet pipe and the connecting pipe. The higher temperature of the gas entering the connecting pipe is likely to cause another substance with a lower boiling point to be vaporized. The lower temperature of the gas entering the connecting pipe leads to lower purification efficiency, and the gas temperature entering the connecting pipe cannot be accurately controlled.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A toluene distillation tower device for vitamin H bromination includes a distillation tower body, an air outlet pipe and a connecting pipe are provided at the top of the distillation tower body, the air outlet pipe is connected to the connecting pipe, and the connecting pipe is welded to the top of the distillation tower body, the air outlet pipe and the connecting pipe are used to discharge low-boiling-point liquid, a reflux pipe is provided on one side of the distillation tower body, a tower plate is provided inside the distillation tower body and below the reflux pipe, a flow guide structure is provided at the top of the distillation tower body, the flow guide structure includes a fixed inner tube, the fixed inner tube and the bottom end of the connecting pipe are manufactured as a whole, and the fixed inner tube is provided with a fixed inner tube. The lower end is provided with a fixed outer tube, and the inner top of the distillation tower body is welded with an annular filter plate. The filter plate is used to filter impurities in the gas at the top of the distillation tower body. The lower end of the filter plate is provided with an outer fixed sleeve, and the filter plate is embedded in the top of the outer fixed sleeve. The top of the outer fixed sleeve is provided with several air inlet grooves. The air inlet grooves are used for gaseous substances to enter the interior of the outer fixed sleeve. The air flow inside the distillation tower body flows along the inside of the air inlet grooves and the inside of the fixed outer tube. The total length of the fixed inner tube and the fixed outer tube changes to make slight adjustments to the exhaust gas temperature at the connecting pipe.

[0007] As a preferred technical solution of the present invention, the fixed outer tube and the fixed inner tube are transitionally matched, and fixing pins are provided at the bottom end of the filter plate and the upper end of the outer fixing sleeve, through which the filter plate is fixed to the outer fixing sleeve.

[0008] As a preferred technical solution of the present invention, a closed structure is provided between the fixed inner tube and the fixed outer tube, and the closed structure includes two groups of drive motors, the two groups of drive motors are installed at the top of the distillation tower body, and the output ends of the two groups of drive motors are provided with fixed shafts, a fixed plate is sleeved between the two fixed shafts, and the fixed plate and the fixed outer tube are manufactured as one piece, the lower end of the fixed shaft is threadedly connected to the two sides of the fixed plate, and the cooperation between the fixed shaft and the fixed plate is used to adjust the position of the fixed plate, the fixed outer tube is slidably connected to the fixed inner tube, and the position of the fixed inner tube and the fixed outer tube changes, thereby changing the length of the air flow path inside the air inlet groove and the fixed outer tube.

[0009] As a preferred technical solution of the present invention, threaded sleeves are provided on both sides of the air inlet groove, and a matching thread is provided on the outside of the lower end of the fixed shaft, and the matching thread is threadedly connected to the threaded sleeve.

[0010] As a preferred technical solution of the present invention, two connecting holes are provided at the bottom end of the fixed inner tube, and the two connecting holes pass through the cross-sectional diameter of the fixed inner tube. Connecting pins are connected to the inside of the two connecting holes, and a sealing plate is welded between the two connecting pins and inside the fixed inner tube. The cross-section of the sealing plate is adapted to the cross-section of the fixed inner tube. Gears are provided at the ends of the two connecting pins, and the two gears rotate synchronously with the sealing plate. Two sliding grooves arranged in a vertical direction are provided on the inner wall of the fixed outer tube, and mating teeth are provided inside the two sliding grooves and on the same side of the two gears. The two mating teeth are respectively engaged with the two gears.

[0011] As a preferred technical solution of the present invention, the sliding groove is shaped like a stepped groove, and the end of the connecting pin is located inside the narrow end of the sliding groove, the connecting pin is located inside the sliding groove for sliding connection, and the gear is located inside the wide end of the sliding groove.

[0012] As a preferred technical solution of the present invention, the edges of the sealing plate are chamfered, and the edges of the sealing plate match 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.

[0013] As a preferred technical solution of the present invention, an impurity removal structure is provided at the inner top of the distillation tower body and the outside of the fixed inner tube, and the impurity removal structure includes a fixed ring, which is sleeved on the outside of the fixed inner tube, and two matching racks are welded to the bottom end of the fixed ring, and the two matching racks are respectively aligned with the two sliding grooves, and the two matching racks are respectively engaged with the two gears, and the fixed ring is slidably connected to the fixed inner tube, and a collecting plate is provided at the bottom end of the fixed ring, and an ionization electrode is installed at the inner top of the distillation tower body, and the ionization electrode corresponds to the position of the collecting plate, and the electrostatic field is used to ionize the gas so that the dust particles are charged and adsorbed to the dust collecting electrode.

[0014] As a preferred technical solution of the present invention, the shapes of the collecting plate and the ionizing plate are both sleeve-shaped, the axis of the collecting plate matches the axis of the ionizing plate, and the height of the ionizing plate is greater than that of the collecting plate.

[0015] As a preferred technical solution of the present invention, a reserved groove is opened at the top edge of the fixed outer tube, the reserved groove is aligned with the bottom end of the collecting plate, and the interior of the reserved groove is slidably connected to the bottom end of the collecting plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] A flow guide structure is provided, and a meandering channel is formed between the outer fixed sleeve, the fixed outer tube and the outer fixed sleeve, thereby increasing the length of the gas channel, and the gas discharged from the gas outlet pipe and the connecting pipe is adapted to the boiling point of the collected gas;

[0018] The fixed inner tube is connected to the fixed outer tube by sliding. The total length of the fixed inner tube and the fixed outer tube is changed to slightly adjust the exhaust gas temperature at the connecting pipe, ensuring the purity of the gas at the outlet pipe while improving efficiency.

[0019] A closed structure is provided, and the relative positions of the fixed inner tube and the fixed outer tube can be precisely adjusted by threading the fixed shaft and the fixed plate, thereby accurately controlling the temperature of the gas entering the outlet pipe; the opening and closing of the sealing plate can be controlled by the driving motor, and the air flow channel can be closed when gas flow is not required;

[0020] The impurity removal structure and the closed structure are coordinated, and the collection plate and the ionization plate are coordinated to process a small amount of dust and foreign matter in the gas. When cleaning the dust inside the external fixed sleeve, the gear is engaged with the matching teeth and the matching rack to clean the dust accumulated on the collection plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a main structural diagram of a toluene distillation tower device for vitamin H bromination according to the present invention;

[0023] Figure 2 This is a schematic diagram of the interior of a distillation tower body of a toluene distillation tower device for vitamin H bromination according to the present invention;

[0024] Figure 3 This is a schematic diagram of the flow diversion structure of a toluene distillation tower device for vitamin H bromination according to the present invention;

[0025] Figure 4 This is a schematic diagram of the internal airflow of an outer fixed sleeve of a toluene distillation tower device for vitamin H bromination according to the present invention;

[0026] Figure 5 This is a schematic diagram of the closed structure of a toluene distillation tower device for vitamin H bromination according to the present invention;

[0027] Figure 6 This is a schematic diagram of the position changes of the fixed inner tube and the fixed outer tube of a toluene distillation tower device for vitamin H bromination according to the present invention;

[0028] Figure 7 This is a schematic diagram of a sealing plate of a toluene distillation tower device for vitamin H bromination according to the present invention;

[0029] Figure 8 This is a schematic diagram of the gears of a toluene distillation tower device for vitamin H bromination according to the present invention;

[0030] Figure 9 The present invention is a schematic diagram of the impurity removal structure of a toluene distillation tower device for vitamin H bromination.

[0031] In the figure: 1. Distillation tower body; 2. Gas outlet pipe; 3. Connecting pipe; 4. Guide structure; 41. Fixed inner tube; 42. Fixed outer tube; 43. External fixed sleeve; 44. Gas inlet groove; 45. Filter plate; 46. Fixing pin; 5. Tower plate; 6. Closing structure; 61. Drive motor; 62. Fixed shaft; 63. Matching thread; 64. Fixed plate; 65. Threaded 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 plate; 75. Reserved groove; 8. Reflux pipe. DETAILED DESCRIPTION

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention. Example 1

[0033] See also Figures 1-4As shown, a toluene distillation tower device for vitamin H bromination includes a distillation tower body 1, a gas outlet pipe 2 and a connecting pipe 3 are provided 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, the gas outlet pipe 2 and the connecting pipe 3 are used to discharge the low-boiling point liquid, and the high-boiling point liquid or the liquefied liquid flows downward along the inner wall of the distillation tower body 1, a reflux pipe 8 is provided on one side of the distillation tower body 1, and a tower plate 5 is provided inside the distillation tower body 1 and below the reflux pipe 8 to pass the gaseous substance through the tower The plate 5 rises upward, and the liquid substance is collected on the surface of the tower plate 5 and drips to the bottom of the tower plate 5. The internal top of the distillation tower body 1 is provided with a guide structure 4, which includes a fixed inner tube 41. The fixed inner tube 41 is integrally manufactured with the bottom end of the connecting tube 3. The lower end of the fixed inner tube 41 is sleeved with a fixed outer tube 42. The fixed inner tube 41 and the fixed outer tube 42 are fitted together, so that the fixed outer tube 42 rises or falls along the fixed inner tube 41. The internal top of the distillation tower body 1 is welded with an annular filter plate 45, which is used to filter the distillation tower body 1. Impurities in the top gas, the lower end of the filter plate 45 is provided with an outer fixing sleeve 43, 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 distillation tower body 1, and the top of the outer fixing 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 fixing sleeve 43, and the bottom end of the outer fixing sleeve 43 is provided with a water-permeable hole, and some gases flow out from the bottom end of the outer fixing sleeve 43 after liquefaction, so as to avoid liquid being retained in the interior of the outer fixing sleeve 43. The air flow inside the distillation tower body 1 flows along the inlet grooves 44. The liquid flows inside the gas groove 44 and the fixed outer tube 42, and is vaporized after being heated to a certain temperature, so that the temperature entering the outlet pipe 2 and the connecting pipe 3 reaches a distilled substance with a relatively low boiling point. The lower gaseous substance enters the inside of the outer fixed 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 fixed sleeve 43, and is then discharged from the connecting pipe 3 and the outlet pipe 2. The air flow channel is arranged in an S shape, and the total length of the fixed inner tube 41 and the fixed outer tube 42 changes to make slight adjustments to the exhaust gas temperature at the connecting pipe 3.

[0034] See also Figure 3 and Figure 4 As shown, the transition fit between the fixed outer tube 42 and the fixed inner tube 41 can change the relative position of the fixed inner tube 41 and the fixed outer tube 42, thereby changing the length of the fixed inner tube 41 and the fixed outer tube 42. The bottom end of the filter plate 45 and the upper end of the outer fixed sleeve 43 are both provided with fixing pins 46. The filter plate 45 is fixed to the outer fixed sleeve 43 through the fixing pins 46, and the outer fixed sleeve 43 is fixed to the filter plate 45. Impurities in some gaseous substances are filtered to ensure that the gaseous substances entering the fixed inner tube 41 and the fixed outer tube 42 are relatively clean.

[0035] It should be noted that the distillation tower body 1 heats two liquids with different boiling points. The liquid with a lower boiling point is first discharged from the outlet pipe 2 and the connecting pipe 3, and the liquid with a lower boiling point is retained inside the distillation tower body 1. The liquid is heated to a certain temperature and then vaporized, so that the temperature entering the outlet pipe 2 and the connecting pipe 3 reaches a distilled substance with a relatively low boiling point. The lower gaseous substance enters the interior of the outer fixed sleeve 43 from the air inlet groove 44, and then enters the interior of the fixed outer tube 42 and the fixed inner tube 41 from the interior of the outer fixed sleeve 43, and then the gas is discharged from the connecting tube 3 and the outlet pipe 2. The airflow channel is arranged in an S shape, and the total length of the fixed inner tube 41 and the fixed outer tube 42 42 is changed to make slight adjustments to the exhaust gas temperature at the connecting pipe 3.

[0036] See also Figure 2 、 Figure 5-Figure 8 As shown, a closed structure 6 is provided between the fixed inner tube 41 and the fixed outer tube 42, and the closed structure 6 includes two sets of drive motors 61, which are installed on the top of the distillation tower body 1, and the drive motors 61 are installed on the top of the distillation tower body 1 by bolts, and the output ends of the two sets of drive motors 61 are provided with fixed shafts 62, which are inserted into the interior of the distillation tower body 1, and a fixed plate 64 is sleeved between the two fixed shafts 62, and the fixed plate 64 is manufactured integrally with the fixed outer tube 42, and the lower end of the fixed shaft 62 is threadedly connected to the two sides of the fixed plate 64, and the cooperation between the fixed shaft 62 and the fixed plate 64 is used to adjust the position of the fixed plate 64, and the fixed outer tube 42 is slidably connected to the fixed inner tube 41, and the position of the fixed inner tube 41 and the fixed outer tube 42 changes, thereby changing the air flow path inside the air inlet groove 44 and the fixed outer tube 42. Length, the fixed shaft 62 and the fixed plate 64 are threadedly connected so that the fixed plate 64 can be raised and lowered, and the fixed plate 64 drives the fixed outer tube 42 to slide and connect with the fixed inner tube 41. The change in the length of the fixed inner tube 41 and the fixed outer tube 42 can change the temperature of the gas entering the outlet pipe 2 and the connecting pipe 3. When the temperature of the gas at the outlet pipe 2 and the connecting pipe 3 is slightly lower than the boiling point, 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 is still gas. When the temperature of the gas at the outlet pipe 2 and the connecting pipe 3 is slightly higher than the boiling point, another liquid substance is also easy to evaporate to the connecting pipe 3. The fixed outer tube 42 can be raised to lengthen the channel, so that only one gas will reach the outlet pipe 2 and the connecting pipe 3, ensuring the purity of the gas at the outlet pipe 2 while improving efficiency.

[0037] See also Figure 5 and Figure 6As shown, 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. The matching thread 63 is threadedly connected to the threaded sleeve 65. The fixed shaft 62 is driven by the driving motor 61 to change the position of the fixed plate 64. The matching thread 63 and the threaded sleeve 65 can better and more accurately control the position of the fixed plate 64, thereby changing the path of the gas material entering the fixed outer tube 42.

[0038] See also Figure 7 and Figure 8 As shown, the bottom end of the fixed inner tube 41 is provided with two connecting holes 66, and the two connecting holes 66 pass through the cross-sectional diameter of the fixed inner tube 41. The two connecting holes 66 are connected to the inside of the connecting pins 69, and the connecting holes 66 are rotatably connected to the connecting pins 69. A sealing plate 68 is welded between the two connecting 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 be located inside the fixed inner tube 41 and rotated. Gears 611 are provided at the ends of the two connecting pins 69. The two gears 611 rotate synchronously with the sealing plate 68. The inner wall of the fixed outer tube 42 is provided with two connecting pins 69. The sliding grooves 67 are arranged in the vertical direction, and matching teeth 610 are provided inside the two sliding grooves 67 and on the same side of the two gears 611. The two matching teeth 610 are respectively engaged with the two gears 611. When the fixed plate 64 is raised or lowered, it drives the fixed inner tube 41 and the fixed outer tube 42 to move closer or farther away. At this time, the matching teeth 610 inside the sliding grooves 67 are engaged with the gears 611, so that the rotation of the gear 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, so that the opening and closing state of the fixed inner tube 41 controls the gas flow at the fixed inner tube 41.

[0039] See also Figure 6 and Figure 7 As shown, the sliding groove 67 is shaped like 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. The two connecting pins 69 are respectively located inside the two sliding grooves 67, so that the connecting 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, and does not affect the rotation of the gear 611 while moving up and down inside the sliding groove 67.

[0040] See also Figure 8As shown, 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 sealing plate 68 with chamfered corners 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 airflow channel of the fixed inner tube 41. When the sealing plate 68 is in a horizontal state, the gas inside the fixed inner tube 41 is in a cut-off state. When the sealing plate 68 is arranged at an angle, the gas inside the fixed inner tube 41 is in an open state.

[0041] It should be noted that when the temperature of the gas at the outlet pipe 2 and the connecting pipe 3 is slightly lower than the boiling point, 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 is still gas. When the temperature of the gas at the outlet pipe 2 and the connecting pipe 3 is slightly higher than the boiling point, another liquid substance is also evaporated to the connecting pipe 3. The fixed outer tube 42 can be raised to make the channel longer, so that only one type of gas will reach the outlet pipe 2 and the connecting pipe 3, ensuring the purity of the gas at the outlet pipe 2 while improving efficiency. The combination of the thread 63 and the threaded sleeve 65 can better and more accurately control the position of the fixed plate 64, thereby changing the path of the gas substance entering the fixed outer tube 42. The sealing plate 68 and the fixed inner tube 41 can be in a closed state and an open state, so that the opening and closing states of the fixed inner tube 41 control the gas flow at the fixed inner tube 41.

[0042] See also Figure 2 and Figure 9 As shown, the internal top of the distillation tower body 1 and the outside of the fixed inner tube 41 are provided with an impurity removal structure 7, which includes a fixed ring 71, which is sleeved on the outside of the fixed inner tube 41, and two matching racks 73 are welded to the bottom end of the fixed ring 71. The two matching racks 73 are aligned with the two sliding grooves 67 respectively, and the matching racks 73 move along the vertical direction, and the two matching racks 73 are respectively engaged with the two gears 611. The fixed ring 71 is slidably connected to the fixed inner tube 41, and the matching racks 73 are engaged with the gears 611 so that the collecting plate 72 and the fixed ring 71 can be lifted and lowered. 1 is provided with a collecting plate 72 at the bottom end, and an ionization plate 74 is installed at the top end of the interior of the distillation tower body 1. The air flow can pass through the air holes of the ionization plate 74, and the ionization plate 74 corresponds to the position of the collecting plate 72. When the ionization plate 74 is energized, the gas is ionized by the electrostatic field so that the dust particles are charged and adsorbed on the electrode to collect dust. The gas enters the outer fixed sleeve 43 from the air inlet groove 44, and is ionized by the ionization plate 74 at this time, so that the dust or impurities in the gas are collected by the collecting plate 72, ensuring that the gas entering the fixed outer tube 42 and the fixed inner tube 41 is relatively clean.

[0043] See also Figure 9As shown, the shape of the collecting plate 72 and the shape of the ionization plate 74 are both sleeve-shaped, and the axis of the collecting plate 72 is adapted to the axis of the ionization plate 74, the height of the ionization plate 74 is greater than the height of the collecting plate 72, and the position of the collecting plate 72 changes so that the collecting plate 72 always corresponds to the fixing ring 71, which will not affect the ionization plate 74 and the collecting plate 72 in removing dust and impurities; a reserved groove 75 is provided at the top edge of the fixed outer tube 42, and the reserved groove 75 is aligned with the bottom end of the collecting plate 72, and the interior of the reserved groove 75 is slidably connected to the bottom end of the collecting plate 72. When cleaning the interior of the outer fixed sleeve 43 at a later stage, the fixed outer tube 42 can be moved upward, and the collecting plate 72 can be inserted into the reserved groove 75 of the fixed outer tube 42, so that the accumulated dust and foreign matter can be scraped off, which is convenient for cleaning the dust on the collecting plate 72.

[0044] It should be noted that the ionization plate 74 is energized and the electrostatic field is used to ionize the gas so that the dust particles are charged and adsorbed to the dust collector on the electrode. The air is ionized by the ionization plate 74, so that the dust or impurities in the gas are collected by the collecting 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 fixed sleeve 43 later, the fixed outer tube 42 can be moved upward. At this time, the collecting plate 72 can be inserted into the reserved groove 75 of the fixed outer tube 42, and the accumulated dust and foreign matter can be scraped off, which facilitates the cleaning of the dust on the collecting plate 72.

[0045] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only 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 the top of the distillation tower body (1) is provided with an air outlet pipe (2) and a connecting pipe (3), 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 distillation tower body (1), and the air outlet pipe (2) and the connecting pipe (3) are used to discharge low-boiling-point liquid, a reflux pipe (8) is provided on one side of the distillation tower body (1), and a tower plate (5) is provided inside the distillation tower body (1) and below the reflux pipe (8), wherein the equipment is characterized in that: The top of the interior of the distillation tower body (1) is provided with a flow guide structure (4), the flow guide structure (4) comprises a fixed inner tube (41), the fixed inner tube (41) and the bottom end of the connecting tube (3) are manufactured as a whole, the lower end of the fixed inner tube (41) is sleeved with a fixed outer tube (42), the top of the interior of the distillation tower body (1) is welded with an annular filter plate (45), the filter plate (45) is used to filter impurities in the gas at the top of the distillation tower body (1), and the lower end of the filter plate (45) is provided with an outer fixed sleeve. (43), and the filter plate (45) is embedded in the top of the outer fixed sleeve (43), and a plurality of air inlet grooves (44) are opened at the top of the outer fixed sleeve (43), and 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 distillation tower body (1) flows along the inside of the air inlet grooves (44) and the inside of the fixed outer tube (42). The total length of the fixed inner tube (41) and the fixed outer tube (42) changes to slightly adjust the exhaust gas temperature at the connecting pipe (3); A closed structure (6) is provided between the fixed inner tube (41) and the fixed outer tube (42), and the closed structure (6) includes two groups of drive motors (61). The two groups of drive motors (61) are installed at the top of the distillation tower body (1), and 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), and the fixed plate (64) and the fixed outer tube (42) are manufactured as a whole. The lower end of the fixed shaft (62) is threadedly connected to both 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 air flow path inside the air inlet groove (44) and the fixed outer tube (42).

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). 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 1, 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).

4. A toluene distillation tower device for vitamin H bromination according to claim 3, characterized in that: The bottom end of the fixed inner tube (41) is provided with two connecting holes (66), the two connecting holes (66) pass through the cross-sectional diameter of the fixed inner tube (41), and the inside of the two connecting holes (66) are connected with connecting pins (69). A sealing plate (68) is welded between the two connecting pins (69) and located 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). Gears (611) are provided at the ends of the two connecting pins (69), and the two gears (611) rotate synchronously with the sealing plate (68). 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 located on the same side of the two gears (611). The two matching teeth (610) are respectively engaged with the two gears (611).

5. A toluene distillation tower device for vitamin H bromination according to claim 4, characterized in that: The sliding groove (67) is shaped like 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).

6. A toluene distillation tower device for vitamin H bromination according to claim 4, characterized in that: The edges of the sealing plate (68) are rounded, 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 degrees. The rotation of the sealing plate (68) is used to open and close the air flow channel of the fixed inner tube (41).

7. A toluene distillation tower device for vitamin H bromination according to claim 6, characterized in that: The top of the interior of the distillation tower body (1) and the exterior of the fixed inner tube (41) are provided with an impurity removal structure (7), the impurity removal structure (7) comprising a fixed ring (71), the fixed ring (71) being sleeved on the exterior of the fixed inner tube (41), the bottom end of the fixed ring (71) being welded with two matching racks (73), the two matching racks (73) being aligned with the two sliding grooves (67) respectively, and the two matching racks (73) being meshed with the two gears (611) respectively, the fixed ring (71) being slidably connected to the fixed inner tube (41), the bottom end of the fixed ring (71) being provided with a collecting plate (72), the top of the interior of the distillation tower body (1) being provided with an ionization electrode (74), and the ionization electrode (74) and the collecting plate (72) being positioned correspondingly, utilizing an electrostatic field to ionize the gas so that the dust particles are electrically adsorbed onto the electrode for dust collection.

8. A toluene distillation tower device for vitamin H bromination according to claim 7, 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) is adapted to 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).

9. A toluene distillation tower device for vitamin H bromination according to claim 7, 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).

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