Distillation still residual liquid evaporation device for recovering 2, 6-dihydroxytoluene

Abstract

The utility model relates to the technical field of chemical raw material processing, in particular to a distillation still residual liquid evaporation device for recycling 2, 6-dihydroxytoluene, which comprises a support frame, a distillation kettle main body is mounted on the supporting frame, a vertical section of an L-shaped liquid discharge pipe is arranged in the distillation kettle main body in a penetrating manner, liquid leakage holes are uniformly distributed in a side curved surface of the vertical section of the L-shaped liquid discharge pipe, the top end of an outer sleeve penetrates through a first sealing ring and is arranged in the vertical section of the L-shaped liquid discharge pipe, and a sealing plug is positioned on the inner side of the liquid leakage hole; a pressure pump is mounted at the bottom end of the inner pipe, distillation residual liquid in the distillation kettle main body can leak into the L-shaped liquid discharge pipe from the liquid leakage hole and can continuously rotate through the through hole in the side surface of the outer sleeve to wash the inner wall of the distillation kettle main body under the condition that a water source is continuously pumped by the pressure pump, and sewage after washing can also leak into the L-shaped liquid discharge pipe from the liquid leakage hole; compared with a traditional distillation still residual liquid evaporation and recovery device, the distillation still residual liquid evaporation and recovery device is better in cleaning effect.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical raw material processing, in particular to an evaporation device for recovering residual liquid from a distillation kettle of 2,6-dihydroxytoluene. Background Art

[0002] 2,6-Dihydroxytoluene is a phenol compound with a wide range of uses. It can be used to synthesize porphyrin and porphine compounds, which are widely used in polymer materials, molecular targeted drugs and chemical catalysis. When 2,6-dihydroxytoluene is prepared, its water-soluble mixture needs to be heated for crystallization extraction. However, a large amount of residual liquid remains in the distillation kettle after distillation extraction and crystallization. In order to save production resources and improve production economy, the residual liquid needs to be recovered.

[0003] A patent with announcement number CN 215048820 U discloses an evaporation device for recovering residual liquid from a distillation kettle of 2,6-dihydroxytoluene, comprising: a base frame, which is a rectangular frame structure, and a distillation kettle body is movably installed on the top of the base frame through a mounting rod; a first connecting pipe, the input end of the first connecting pipe is connected to the left side of the distillation kettle body through a first drainage pipe, and the first drainage pipe is sealed and connected to a filter screen arranged inside the distillation kettle body; a second connecting pipe, the second connecting pipe is sealed and connected to a filter screen installed inside the distillation kettle body through a valve installed on the second drainage pipe, the distillation kettle body is driven to rotate counterclockwise by a hydraulic rod, and waste liquid is discharged from the second drainage pipe to the inside of a waste liquid collection device through the filter screen, and the distillation kettle body is driven to rotate clockwise by the hydraulic rod, and the waste liquid is discharged to a wastewater treatment device through the first drainage pipe connected to the filter screen.

[0004] However, the existing distillation kettle residual liquid evaporation device has poor cleaning effect on the main body of the distillation kettle during use, and the cleaning is not thorough, which affects the subsequent distillation use and leads to low applicability. Therefore, in order to solve the above problem, an evaporation device for recovering 2,6-dihydroxytoluene distillation kettle residual liquid is proposed. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and to address the problems existing in the prior art, the utility model provides an evaporation device for recovering residual liquid from a distillation kettle of 2,6-dihydroxytoluene.

[0006] The technical solution adopted by the utility model to solve the technical problem is as follows: the utility model discloses an evaporation device for recovering residual liquid from a distillation kettle of 2,6-dihydroxytoluene, comprising a support frame; a distillation kettle body is installed on the support frame, an L-shaped drainage pipe is installed through the bottom of the distillation kettle body, and the vertical section of the L-shaped drainage pipe is installed through the inside of the distillation kettle body, leakage holes are evenly distributed on the side curved surface of the vertical section of the L-shaped drainage pipe, a No. 1 sealing ring is installed under the L-shaped drainage pipe, and the center line of the No. 1 sealing ring coincides with the center line of the vertical section of the L-shaped drainage pipe, and a distillation recovery component is arranged on the horizontal section of the L-shaped drainage pipe;

[0007] A hydraulic rod is installed under the support frame, and a lifting plate is installed vertically downward at the action end of the hydraulic rod, and a fixed collar is installed at the other end of the lifting plate, and an outer sleeve is rotatably installed in the fixed collar through a No. 2 bearing, and the top of the outer sleeve passes through a No. 1 sealing ring and is arranged in the vertical section of the L-shaped drainage pipe, and a sealing plug for sealing the opening of the vertical section of the L-shaped drainage pipe is installed at the top of the outer sleeve, and the sealing plug is located on the inner side of the leakage hole, and a No. 2 sealing ring is installed at the bottom end of the outer sleeve, and a No. 1 bearing is installed on the No. 2 sealing ring, and an inner tube is simultaneously passed through the No. 2 sealing ring and the No. 1 bearing, and a pressure pump is installed at the bottom end of the inner tube;

[0008] A gear ring is installed at the bottom end of the outer side of the outer sleeve, and the gear ring is located above the fixed sleeve ring. A motor is installed under the lifting plate through a fixing part. The output shaft of the motor passes through the lifting plate and is equipped with a gear, and the gear is meshed with the gear ring. Through holes are evenly distributed on the side curved surface of the outer sleeve, which achieves the purpose of cleaning the distillation kettle. Compared with the traditional distillation kettle residual liquid evaporation recovery device, the cleaning effect is better.

[0009] Preferably, the lifting plate and the hydraulic rod are perpendicular to each other, the hydraulic rod and the center line of the No. 1 sealing ring are parallel to each other, and the leakage holes are evenly distributed on the side curved surface of the sealing plug, so that the leakage holes are sealed to ensure the normal use of the distillation kettle.

[0010] Preferably, the center line of the inner tube coincides with the center line of the outer sleeve, and a No. 3 sealing ring for limiting is installed on the top of the inner tube, and the No. 3 sealing ring is located inside the outer sleeve, so that the outer sleeve can be extended and set inside the main body of the distillation kettle for cleaning.

[0011] Preferably, a limiting sealing disk for limiting position is installed on the sealing plug, and the limiting sealing disk is located on the opening of the vertical section of the L-shaped discharge pipe, so as to achieve the function of limiting sealing to prevent leakage of raw materials in the distillation kettle when it is in use.

[0012] Preferably, the distillation recovery component includes a constant temperature heating stirring tank, a No. 2 valve and a liquid outlet pipe, and the constant temperature heating stirring tank is installed at the end of the horizontal section of the L-shaped discharge pipe, the liquid outlet pipe is installed under the horizontal section of the L-shaped discharge pipe, the No. 2 valve is located between the liquid outlet pipe and the constant temperature heating stirring tank, and the No. 1 valve is installed on the liquid outlet pipe to cooperate with the function of residual liquid recovery and facilitate the diversion and discharge of cleaning wastewater, thereby effectively improving the convenience of use.

[0013] Preferably, a wastewater collection tank is installed under the liquid outlet pipe, a condenser is installed on the constant temperature heating and stirring tank, a condensate collection tank is installed at the other end of the condenser tilted downward, and a refrigeration module is installed on the condenser, which achieves the purpose of residual liquid recovery and saves production costs.

[0014] Preferably, the distillation recovery components are hoisted under the support frame through fixing parts, thereby achieving the effect of improving the stability of use.

[0015] The utility model is beneficial in that:

[0016] 1. According to the utility model, the distillation residual liquid in the still body 2 will leak into the L-shaped drainage pipe 3 from the leakage hole 4. When the water is pumped into the outer sleeve 6, it will be evenly sprayed on the inner wall of the still body 2 through the through holes opened on the side curved surface of the outer sleeve 6. Under the continuous pumping of the water source by the pressure pump 20, the inner wall of the still body 2 will be continuously rotated and flushed through the through holes on the side of the outer sleeve 6. The flushed sewage will also leak into the L-shaped drainage pipe 3 from the leakage hole 4, thereby achieving the cleaning effect of the still. Compared with the traditional still residual liquid evaporation recovery device, the cleaning effect is better.

[0017] 2. The utility model controls the opening and closing of valve No. 1 23 and valve No. 2 25 to recover the residual liquid and facilitates the diversion and discharge of the cleaning wastewater, thereby effectively improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 is a schematic diagram of a first three-dimensional structure;

[0020] Figure 2 This is an enlarged schematic diagram of the main structure of the distillation recovery component;

[0021] Figure 3It is a cutaway and enlarged schematic diagram of the cleaning component structure;

[0022] Figure 4 It is an enlarged schematic diagram of the main structure of the outer casing;

[0023] Figure 5 It is a cutaway enlarged schematic diagram of the main structure of the L-shaped drainage pipe;

[0024] Figure 6 It is a cutaway and enlarged schematic diagram of the main structure of the driving lifting component;

[0025] Figure 7 This is an enlarged schematic diagram of area A in the cutaway diagram of the main structure of the drive lifting component.

[0026] In the figure: 1. support frame; 2. distillation kettle body; 3. L-shaped drain pipe; 4. leakage hole; 5. No. 1 sealing ring; 6. outer sleeve; 7. sealing plug; 8. limit sealing disk; 9. No. 2 sealing ring; 10. inner tube; 11. No. 3 sealing ring; 12. No. 1 bearing; 13. fixed sleeve; 14. No. 2 bearing; 15. lifting plate; 16. gear ring; 17. motor; 18. gear; 19. hydraulic rod; 20. booster pump; 21. liquid outlet pipe; 22. wastewater collection tank; 23. No. 1 valve; 24. constant temperature heating stirring tank; 25. No. 2 valve; 26. condenser; 27. refrigeration module; 28. condensate collection tank. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-7 As shown, an evaporation device for recovering residual liquid from a distillation kettle of 2,6-dihydroxytoluene comprises a support frame 1; a distillation kettle body 2 is installed on the support frame 1, an L-shaped drainage pipe 3 is installed through the bottom of the distillation kettle body 2, and the vertical section of the L-shaped drainage pipe 3 is installed through the inside of the distillation kettle body 2, and leakage holes 4 are evenly distributed on the side curved surface of the vertical section of the L-shaped drainage pipe 3, a No. 1 sealing ring 5 is installed under the L-shaped drainage pipe 3, and the center line of the No. 1 sealing ring 5 coincides with the center line of the vertical section of the L-shaped drainage pipe 3, and a distillation recovery component is arranged on the horizontal section of the L-shaped drainage pipe 3;

[0029] A hydraulic rod 19 is installed under the support frame 1, and a lifting plate 15 is installed vertically downward at the action end of the hydraulic rod 19, and a fixed collar 13 is installed at the other end of the lifting plate 15. An outer sleeve 6 is rotatably installed in the fixed collar 13 through a No. 2 bearing 14, and the top of the outer sleeve 6 passes through a No. 1 sealing ring 5 and is arranged in the vertical section of the L-shaped drainage pipe 3. A sealing plug 7 for blocking the opening of the vertical section of the L-shaped drainage pipe 3 is installed at the top of the outer sleeve 6, and the sealing plug 7 is located on the inner side of the leakage hole 4. A No. 2 sealing ring 9 is installed at the bottom end of the outer sleeve 6, and a No. 1 bearing 12 is installed on the No. 2 sealing ring 9, and an inner tube 10 is simultaneously passed through the No. 2 sealing ring 9 and the No. 1 bearing 12, and a pressure pump 20 is installed at the bottom end of the inner tube 10;

[0030] A gear ring 16 is installed at the bottom end of the outer side of the outer sleeve 6, and the gear ring 16 is located above the fixed collar 13. A motor 17 is installed under the lifting plate 15 through a fixing part. The output shaft of the motor 17 passes through the lifting plate 15 and is installed with a gear 18, and the gear 18 is meshed with the gear ring 16. Through holes are evenly distributed on the side curved surface of the outer sleeve 6.

[0031] During operation, the existing distillation kettle residual liquid evaporation recovery device has poor cleaning effect on the main body of the distillation kettle during use, and the cleaning is not thorough, which affects the subsequent distillation use and leads to low applicability. In this scheme, by controlling the hydraulic rod 19 to retract during use, the hydraulic rod 19 will drive the lifting plate 15 to move upward when it retracts, and when the lifting plate 15 moves, it will drive the outer sleeve 6 to move upward through the fixed ring 13 and the second bearing 14. When the outer sleeve 6 moves upward, it will slide upward in the first sealing ring 5, and the sealing plug 7 at the top of the outer sleeve 6 will drain liquid from the L-shaped The outer sleeve 6 moves out of the vertical section of the pipe 3. At this time, the distillation residue in the distillation kettle body 2 will leak into the L-shaped drain pipe 3 from the leakage hole 4, and be discharged from the L-shaped drain pipe 3 into the distillation recovery component for recovery. When the outer sleeve 6 moves upward, it will slide upward on the outside of the inner pipe 10 through the No. 2 sealing ring 9 and the No. 1 bearing 12. When the No. 1 bearing 12 fits under the No. 3 sealing ring 11, the outer sleeve 6 will extend and be set in the distillation kettle body 2. At this time, the booster pump 20 is controlled to operate. When the booster pump 20 is in operation, it will pump the external water source into the inner pipe 10 and pass through the inner pipe The top end of 10 enters the outer sleeve 6. Since the outer sleeve 6 is extended and arranged in the still body 2 at this time, when the water is pumped into the outer sleeve 6, it will be evenly sprayed on the inner wall of the still body 2 through the through holes opened on the side curved surface of the outer sleeve 6. At the same time, the motor 17 is controlled to operate. When the motor 17 operates, it will drive the gear 18 to rotate. The gear 18 is meshed with the gear ring 16. The gear ring 16 is installed on the outer sleeve 6, and the outer sleeve 6 is rotatably installed in the fixed sleeve ring 13 through the second bearing 14. When the gear 18 rotates, it will drive the outer sleeve 6 through the gear ring 16 to rotate in L The L-shaped drain pipe 3 rotates, and the outer sleeve 6 rotates in the distillation kettle body 2. At this time, under the continuous pumping of water by the pressure pump 20, the inner wall of the distillation kettle body 2 will be continuously rotated through the through holes on the side of the outer sleeve 6, thereby cleaning the residual liquid and crystals on the inner wall of the distillation kettle body 2. The flushed sewage will also leak into the L-shaped drain pipe 3 from the leakage hole 4, and enter the distillation recovery component from the L-shaped drain pipe 3, thereby achieving the cleaning effect of the distillation kettle. Compared with the traditional distillation kettle residual liquid evaporation recovery device, the cleaning effect is better.

[0032] The lifting plate 15 and the hydraulic rod 19 are perpendicular to each other, the hydraulic rod 19 and the center line of the No. 1 sealing ring 5 are parallel to each other, and the leakage holes 4 are evenly distributed on the side curved surface of the sealing plug 7.

[0033] The center line of the inner tube 10 coincides with the center line of the outer tube 6 . A No. 3 sealing ring 11 for limiting position is installed at the top of the inner tube 10 , and the No. 3 sealing ring 11 is located inside the outer tube 6 .

[0034] A limiting sealing disk 8 for limiting position is installed on the sealing plug 7 , and the limiting sealing disk 8 is located on the opening of the vertical section of the L-shaped liquid discharge pipe 3 .

[0035] See also Figure 1-2 As shown, the distillation recovery component includes a constant temperature heating stirring tank 24, a No. 2 valve 25 and a liquid outlet pipe 21, and the constant temperature heating stirring tank 24 is installed at the end of the horizontal section of the L-shaped discharge pipe 3, the liquid outlet pipe 21 is installed under the horizontal section of the L-shaped discharge pipe 3, the No. 2 valve 25 is located between the liquid outlet pipe 21 and the constant temperature heating stirring tank 24, and the No. 1 valve 23 is installed on the liquid outlet pipe 21.

[0036] During operation, in order to ensure that the recovery of the residual liquid in the distillation kettle residual liquid evaporation recovery device in this scheme is carried out normally, and it is convenient to separate the sewage and the residual liquid, in this scheme, when the residual liquid in the distillation kettle is discharged, the No. 1 valve 23 is controlled to close the liquid outlet pipe 21, and the No. 2 valve 25 is controlled to open, to ensure that the L-shaped discharge pipe 3 is connected with the constant temperature heating stirring tank 24. When the residual liquid enters the constant temperature heating stirring tank 24 through the L-shaped discharge pipe 3, the No. 2 valve 25 is controlled to keep the L-shaped discharge pipe 3 and the constant temperature heating stirring tank 24 in a closed state, and the No. 1 valve 23 is controlled to open the liquid outlet pipe 21, and the wastewater collection tank 22 is kept connected with the L-shaped discharge pipe 3 through the liquid outlet pipe 21. When the cleaning sewage is discharged, it will enter the liquid outlet pipe 21 from the L-shaped discharge pipe 3, and leak into the wastewater collection tank 22 for collection, so as to achieve the effect of residual liquid recovery, and facilitate the diversion and discharge of cleaning sewage, thereby effectively improving the convenience of use.

[0037] See also Figure 1-2 As shown, a wastewater collecting tank 22 is installed under the liquid outlet pipe 21, a condenser 26 is installed on the constant temperature heating stirring tank 24, a condensate collecting tank 28 is installed at the other end of the condenser 26 tilted downward, and a refrigeration module 27 is installed on the condenser 26.

[0038] During operation, in order to ensure the normal recovery of the residual liquid by the residual liquid evaporation recovery device of the distillation kettle in this scheme, in this scheme, the residual liquid will be heated and distilled after entering the constant temperature heating stirring tank 24, and the water vapor generated after the distillation of the residual liquid will enter the condenser 26, and cooperate with the control of the refrigeration module 27 for operation. When the refrigeration module 27 is running, the condenser 26 will be refrigerated, and the temperature of the condenser 26 will be reduced, so that the water vapor in the condenser 26 will condense in time, and the condensed water droplets will condense downward along the condenser 26 in the condensate collection tank 28, thereby achieving the effect of recovering the residual liquid and saving production costs.

[0039] The distillation recovery components are all hoisted under the support frame 1 through fixing parts.

[0040] Working principle: when in use, the hydraulic rod 19 is controlled to retract, and when the hydraulic rod 19 retracts, it will drive the lifting plate 15 to move upward, and when the lifting plate 15 moves, it will drive the outer sleeve 6 to move upward through the fixed ring 13 and the second bearing 14. When the outer sleeve 6 moves upward, it will slide upward in the first sealing ring 5, and the sealing plug 7 at the top of the outer sleeve 6 will move out from the vertical section of the L-shaped drain pipe 3. At this time, the distillation residue in the distillation kettle body 2 will leak into the L-shaped drain pipe 3 from the leakage hole 4, and from the L-shaped The discharge pipe 3 is discharged into the distillation recovery component for recovery, and when the outer sleeve 6 moves upward, it will slide upward on the outside of the inner tube 10 through the No. 2 sealing ring 9 and the No. 1 bearing 12. When the No. 1 bearing 12 fits under the No. 3 sealing ring 11, the outer sleeve 6 will be extended to be set in the distillation kettle body 2. At this time, the pressure pump 20 is controlled to operate. When the pressure pump 20 is running, the external water source will be pumped into the inner tube 10 and enter the outer sleeve 6 through the top of the inner tube 10. Since the outer sleeve 6 is extended to the distillation kettle body at this time 2, when water is pumped into the outer sleeve 6, it will be evenly sprayed on the inner wall of the distillation kettle body 2 through the through holes opened on the side curved surface of the outer sleeve 6, and at the same time, the motor 17 is controlled to operate. When the motor 17 operates, it will drive the gear 18 to rotate, and the gear 18 is meshed with the gear ring 16. The gear ring 16 is installed on the outer sleeve 6, and the outer sleeve 6 is rotatably installed in the fixed sleeve ring 13 through the second bearing 14. When the gear 18 rotates, it will drive the outer sleeve 6 to rotate in the L-shaped discharge pipe 3 through the gear ring 16, and the outer sleeve 6 It rotates inside the distillation kettle body 2. At this time, the pressure pump 20 continuously pumps water through the through holes on the side of the outer sleeve 6 to continuously rotate and flush the inner wall of the distillation kettle body 2, thereby flushing away the residual liquid and crystals on the inner wall of the distillation kettle body 2. The flushed sewage will also leak into the L-shaped drain pipe 3 from the leakage hole 4, and enter the distillation recovery component from the L-shaped drain pipe 3, thereby achieving the cleaning effect of the distillation kettle. Compared with the traditional distillation kettle residual liquid evaporation recovery device, the cleaning effect is better.

[0041] When the residual liquid in the distillation kettle is discharged, the No. 1 valve 23 is controlled to close the liquid outlet pipe 21, and the No. 2 valve 25 is controlled to open to ensure that the L-shaped liquid discharge pipe 3 is connected with the constant temperature heating stirring tank 24. When the residual liquid enters the constant temperature heating stirring tank 24 through the L-shaped liquid discharge pipe 3, the No. 2 valve 25 is controlled to keep the L-shaped liquid discharge pipe 3 and the constant temperature heating stirring tank 24 in a closed state, and the No. 1 valve 23 is controlled to open the liquid outlet pipe 21, and the wastewater collection tank 22 is kept connected with the L-shaped liquid discharge pipe 3 through the liquid outlet pipe 21. When the cleaning sewage is discharged, it will enter the liquid outlet pipe 21 from the L-shaped liquid discharge pipe 3, and leak into the wastewater collection tank 22 for collection, thereby achieving the effect of residual liquid recovery and facilitating the diversion and discharge of the cleaning sewage, thereby effectively improving the convenience of use.

[0042] The residual liquid will be heated and distilled after entering the constant temperature heating stirring tank 24. The water vapor generated after the distillation of the residual liquid will enter the condenser 26 and cooperate with the control of the refrigeration module 27 for operation. When the refrigeration module 27 is in operation, it will refrigerate the condenser 26, thereby reducing the temperature of the condenser 26, so that the water vapor in the condenser 26 will condense. The condensed water droplets will flow downward along the condenser 26 and condense in the condensate collection tank 28, thereby achieving the effect of recovering the residual liquid and saving production costs.

[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A device for recovering 2,6-dihydroxytoluene distillation kettle residual liquid evaporation, characterized in that: The invention comprises a support frame (1); a distillation kettle body (2) is installed on the support frame (1); an L-shaped liquid discharge pipe (3) is installed through the bottom of the distillation kettle body (2); a vertical section of the L-shaped liquid discharge pipe (3) is installed through the inside of the distillation kettle body (2); liquid leakage holes (4) are evenly distributed on the side curved surface of the vertical section of the L-shaped liquid discharge pipe (3); a No. 1 sealing ring (5) is installed under the L-shaped liquid discharge pipe (3); the center line of the No. 1 sealing ring (5) coincides with the center line of the vertical section of the L-shaped liquid discharge pipe (3); and a distillation recovery component is arranged on the horizontal section of the L-shaped liquid discharge pipe (3); A hydraulic rod (19) is installed under the support frame (1), and a lifting plate (15) is installed vertically downward at the working end of the hydraulic rod (19). A fixed collar (13) is installed at the other end of the lifting plate (15). An outer sleeve (6) is rotatably installed in the fixed collar (13) through a No. 2 bearing (14), and the top end of the outer sleeve (6) passes through a No. 1 sealing ring (5) and is arranged in the vertical section of the L-shaped drainage pipe (3). A sealing plug (7) for sealing the opening of the vertical section of the L-shaped drainage pipe (3) is installed at the top end of the outer sleeve (6), and the sealing plug (7) is located on the inner side of the leakage hole (4). A No. 2 sealing ring (9) is installed at the bottom end of the outer sleeve (6), and a No. 1 bearing (12) is installed on the No. 2 sealing ring (9). An inner tube (10) is simultaneously passed through the No. 2 sealing ring (9) and the No. 1 bearing (12), and a pressure pump (20) is installed at the bottom end of the inner tube (10); A gear ring (16) is installed at the bottom end of the outer side of the outer sleeve (6), and the gear ring (16) is located above the fixed collar (13). A motor (17) is installed under the lifting plate (15) through a fixing member. The output shaft of the motor (17) passes through the lifting plate (15) and is installed with a gear (18), and the gear (18) is meshed with the gear ring (16). Through holes are evenly distributed on the side curved surface of the outer sleeve (6).

2. A 2,6-dihydroxytoluene distillation kettle residual liquid evaporation device for recovering according to claim 1, characterized in that: The lifting plate (15) and the hydraulic rod (19) are perpendicular to each other, the hydraulic rod (19) and the center line of the No. 1 sealing ring (5) are parallel to each other, and the leakage holes (4) are evenly distributed on the side curved surface of the sealing plug (7).

3. A 2,6-dihydroxytoluene distillation kettle residual liquid evaporation device for recovering according to claim 1, characterized in that: The center line of the inner tube (10) coincides with the center line of the outer tube (6), a No. 3 sealing ring (11) for limiting position is installed at the top end of the inner tube (10), and the No. 3 sealing ring (11) is located inside the outer tube (6).

4. The device for evaporating residual liquid from a distillation kettle for recovering 2,6-dihydroxytoluene according to claim 1, characterized in that: A limiting sealing disk (8) for limiting position is installed on the sealing plug (7), and the limiting sealing disk (8) is located on the opening of the vertical section of the L-shaped liquid discharge pipe (3).

5. The device for recovering 2,6-dihydroxytoluene distillation kettle residual liquid evaporation according to claim 1, characterized in that: The distillation recovery component comprises a constant temperature heating stirring tank (24), a No. 2 valve (25) and a liquid outlet pipe (21), wherein the constant temperature heating stirring tank (24) is installed at the end of the horizontal section of the L-shaped liquid discharge pipe (3), the liquid outlet pipe (21) is installed under the horizontal section of the L-shaped liquid discharge pipe (3), the No. 2 valve (25) is located between the liquid outlet pipe (21) and the constant temperature heating stirring tank (24), and the No. 1 valve (23) is installed on the liquid outlet pipe (21).

6. The device for evaporating residual liquid from a distillation kettle for recovering 2,6-dihydroxytoluene according to claim 5, characterized in that: A wastewater collection tank (22) is installed under the liquid outlet pipe (21), a condenser (26) is installed on the constant temperature heating and stirring tank (24), a condensate collection tank (28) is installed at the other end of the condenser (26) in an inclined manner downward, and a refrigeration module (27) is installed on the condenser (26).

7. The device for evaporating residual liquid from a distillation kettle for recovering 2,6-dihydroxytoluene according to claim 5, characterized in that: The distillation recovery components are all hoisted under the support frame (1) through fixing parts.

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