CN211098066U - Vacuum rectification tail gas recovery device - Google Patents

Abstract

The utility model discloses a vacuum rectification tail gas recovery unit relates to tail gas recovery unit technical field, to the not good problem of current tail gas recovery unit working property, now proposes following scheme, and it is including retrieving the box, first treatment chamber, first installation cavity, second treatment chamber, second installation cavity and water storage chamber have been seted up to the inside of retrieving the box, the inner wall welding of second installation cavity has the water pump of vertical setting, the input of water pump is connected with the one end of raceway, the other end of raceway extends to the inside in water storage chamber, the output of water pump is connected with the one end of outlet pipe. The utility model discloses can the efficient carry out recovery processing to the tail gas that vacuum rectification produced, can carry out quick cleanness to the inside processing part of tail gas recovery unit, can be simple and convenient carry out dismouting change to the inside processing part of tail gas recovery unit, the working property is high, convenient to use.

Description

Vacuum rectification tail gas recovery device

Technical Field

The utility model relates to a tail gas recovery device technical field especially relates to a vacuum rectification tail gas recovery device.

Background

Vacuum distillation, also known as "reduced pressure distillation", is one of the distillation methods, and is performed under reduced pressure, and is generally used to separate substances that are easily decomposed or polymerized when heated to boiling under normal pressure or to reduce the temperature of distillation in combination with other distillation methods.

In the material carries out vacuum distillation's course of working, need use corresponding tail gas recovery unit to carry out recovery processing to the tail gas that produces among the vacuum distillation process, current tail gas processing apparatus though can carry out recovery processing to the tail gas that produces among the vacuum distillation process, but after tail gas processing apparatus passes through long-time work, tail gas processing apparatus's processing part often can be blockked up by the impurity in the tail gas, just so need artifical manual one by one to tail gas processing apparatus's processing part clearance this moment, in this in-process, not only the clearance inefficiency, and very delay tail gas processing apparatus's tail gas treatment efficiency, the result of use is not good, we have proposed a vacuum rectification tail gas recovery unit for this reason.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of vacuum rectification tail gas recovery device has solved the not good problem of tail gas recovery device working property.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a vacuum rectification tail gas recovery device comprises a recovery box body, wherein a first processing cavity, a first mounting cavity, a second processing cavity, a second mounting cavity and a water storage cavity are formed in the recovery box body, a vertically arranged water pump is welded on the inner wall of the second mounting cavity, the input end of the water pump is connected with one end of a water delivery pipe, the other end of the water delivery pipe extends into the water storage cavity, the output end of the water pump is connected with one end of a water outlet pipe, the other end of the water outlet pipe extends into the first processing cavity and is in a closed shape, the water outlet pipe positioned in the first processing cavity is bonded on the inner wall of the top of the first processing cavity, a plurality of spray heads are mounted on the water outlet pipe positioned in the first processing cavity, a vertically arranged air exhaust fan is fixed on the inner wall of the first mounting cavity through screws, and the output end of the air exhaust fan is connected with one end, the other end of exhaust column extends to the inside of first process chamber, the input of air exhauster is connected with the one end of exhaust pipe, the other end of exhaust pipe extends to the inside of second process chamber, the inside top-down of second process chamber is equipped with first filter screen and second filter screen in proper order, the filtration pore of first filter screen is greater than the filtration pore of second filter screen, the both ends of first filter screen and second filter screen all are equipped with installation mechanism, first filter screen and second filter screen pass through installation mechanism and install on the inner wall of second process chamber, be equipped with clean mechanism between first filter screen and the second filter screen, first filter screen and second filter screen clean through clean mechanism.

Preferably, the cleaning mechanism comprises a connecting column, a cleaning brush, a supporting block, an annular groove, a driving motor, a worm and a worm wheel, the connecting column is positioned between the first filter screen and the second filter screen, the cleaning brush is fixed at two ends of the connecting column by screws, the bristles of the cleaning brush are in contact with the first filter screen and the second filter screen, the supporting blocks are welded on the two sides of the connecting column, the annular groove is arranged on the inner wall of the second processing cavity, the supporting block is rotationally sleeved in the annular groove, the driving motor is welded on the right side of the recovery box body, and the driving motor corresponds to the second processing cavity, the worm is connected to the output end of the driving motor in a transmission way, one end of the worm, far away from the driving motor, is connected to the inner wall of the second treatment cavity through a bearing in a transmission mode, the worm wheel is fixedly sleeved on the outer wall of the connecting column, and the worm wheel and the worm are meshed to work.

Preferably, one side of retrieving the box top is equipped with the intake pipe, the below of intake pipe is equipped with the drain pipe, install the butterfly valve on the drain pipe, intake pipe and drain pipe all correspond with first process chamber, one side of retrieving the bottom half is equipped with the blast pipe, the blast pipe is corresponding with the second process chamber.

Preferably, one side of the outside of the recovery box body is hinged with a movable door through a hinge, the movable door is provided with an observation window, and the outer wall of the movable door is provided with a sealing ring along the circumferential direction.

Preferably, installation mechanism includes double-screw bolt, fixed orifices and fixed cover, the double-screw bolt is located the both ends of first filter screen and second filter screen, the screw bolt welding is on the inner wall of second treatment chamber, the double-screw bolt is L shape structures, fixed cover is located the bottom at first filter screen and second filter screen both ends, fixed cover threaded connection is on the outer wall of double-screw bolt, fixed cover contacts with first filter screen and second filter screen, the diameter of fixed cover is greater than the aperture of fixed orifices

Preferably, the right side of the recycling box body is provided with a rotating groove, the inner wall of the rotating groove is provided with a sealing ring along the circumferential direction, and the worm is rotatably sleeved inside the rotating groove

The utility model discloses:

1. through retrieving the box, first process chamber, first installation cavity, the second process chamber, the second installation cavity, the water storage chamber, a water pump, the raceway, the outlet pipe, the shower nozzle, the air exhauster, the exhaust pipe, first filter screen, the second filter screen, the spliced pole, the cleaning brush, the supporting shoe, the ring channel, driving motor, the worm wheel, the intake pipe, the cooperation work of drain pipe and blast pipe, but the efficient carries out recovery processing to the tail gas that vacuum rectification produced, avoid the harmful tail gas loss everywhere that vacuum rectification produced, thereby the polluted environment, high working property, and can carry out quick cleanness to the inside processing unit of tail gas recovery unit, it is blockked up to avoid processing unit by the impurity in the tail gas, avoid the manual work to clear up processing unit one by one, the efficiency of tail gas treatment is improved, manpower is saved, high durability and convenient use.

2. Through the cooperation work of dodge gate, observation window, double-screw bolt, fixed orifices and fixed cover, the user can be simple and convenient carry out the dismouting to the inside processing unit of tail gas recovery device and change, improves tail gas processing apparatus's duration, and duration is strong.

Drawings

Fig. 1 is a schematic structural diagram of a vacuum rectification tail gas recovery device provided by the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

fig. 3 is a front view of the vacuum distillation tail gas recovery device provided by the present invention.

Reference numbers in the figures: 1. a recovery box body; 2. a first processing chamber; 3. a first mounting cavity; 4. a second processing chamber; 5. a second mounting cavity; 6. a water storage cavity; 7. a water pump; 8. a water delivery pipe; 9. a water outlet pipe; 10. a spray head; 11. an exhaust fan; 12. an exhaust pipe; 13. an exhaust duct; 14. a first filter screen; 15. a second filter screen; 16. connecting columns; 17. a cleaning brush; 18. a support block; 19. an annular groove; 20. a drive motor; 21. a worm; 22. a worm gear; 23. an air inlet pipe; 24. a drain pipe; 25. a movable door; 26. an observation window; 27. a stud; 28. a fixing hole; 29. fixing a sleeve; 30. and (4) exhausting the gas.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, a vacuum rectification tail gas recovery device comprises a recovery box body 1, a first processing cavity 2, a first installation cavity 3, a second processing cavity 4, a second installation cavity 5 and a water storage cavity 6 are arranged inside the recovery box body 1, a vertically arranged water pump 7 is welded on the inner wall of the second installation cavity 5, the input end of the water pump 7 is connected with one end of a water pipe 8, the other end of the water pipe 8 extends into the water storage cavity 6, the output end of the water pump 7 is connected with one end of a water outlet pipe 9, the other end of the water outlet pipe 9 extends into the first processing cavity 2 and is in a closed shape, the water outlet pipe 9 positioned inside the first processing cavity 2 is adhered on the inner wall of the top of the first processing cavity 2, a plurality of spray nozzles 10 are arranged on the water outlet pipe 9 positioned inside the first processing cavity 2, an exhaust fan 11 which is vertically arranged is fixed on the inner wall screw of the first installation, the output end of the exhaust fan 11 is connected with one end of an exhaust pipe 12, the other end of the exhaust pipe 12 extends into the first treatment cavity 2, the input end of the exhaust fan 11 is connected with one end of an exhaust pipe 13, the other end of the exhaust pipe 13 extends into the second treatment cavity 4, a first filter screen 14 and a second filter screen 15 are sequentially arranged in the second treatment cavity 4 from top to bottom, the filter hole of the first filter screen 14 is larger than the filter hole of the second filter screen 15, mounting mechanisms are respectively arranged at two ends of the first filter screen 14 and the second filter screen 15, the first filter screen 14 and the second filter screen 15 are mounted on the inner wall of the second treatment cavity 4 through the mounting mechanisms, a cleaning mechanism is arranged between the first filter screen 14 and the second filter screen 15, the first filter screen 14 and the second filter screen 15 are cleaned through the cleaning mechanism, an air inlet pipe 23 is arranged at one side of the top of the recovery box body 1, a butterfly valve is arranged on the water discharge pipe 24, the air inlet pipe 23 and the water discharge pipe 24 both correspond to the first processing cavity 2, an exhaust pipe 30 is arranged on one side of the bottom of the recovery box body 1, the exhaust pipe 30 corresponds to the second processing cavity 4, when a user needs to use the tail gas recovery device to process tail gas generated by vacuum rectification, enough tail gas can be discharged into the first processing cavity 2 through the air inlet pipe 23, then the processing water liquid in the water storage cavity 6 can be pumped and transported into the water delivery pipe 8 through the operation of the water pump 7, enough processing water liquid can be input into the water outlet pipe 9 through the water delivery pipe 8, then the processing water liquid in the water outlet pipe 9 can be discharged through the spray head 10, at this time, the tail gas in the first processing cavity 2 can be processed through the processing water liquid sprayed by the spray head 10, and after the tail gas in the first processing cavity 2 is processed through the processing, the operation of accessible air exhauster 11 this moment, pump the inside tail gas of first treatment chamber 2 to the inside of exhaust column 12, exhaust column 12 is arranged the inside tail gas of first treatment chamber 2 and is transported to the inside of exhaust pipe 13, accessible exhaust pipe 13 is arranged the inside tail gas of first treatment chamber 2 and is transported to the inside of second treatment chamber 4 this moment, the inside first filter screen 14 of accessible second treatment chamber 4 and second filter screen 15 carry out filtration treatment to the inside tail gas of second treatment chamber 4 this moment, the tail gas through multiprocessing this moment will accord with corresponding exhaust standard, the tail gas that accessible blast pipe 30 will accord with exhaust standard at this moment is discharged.

And the water inside the first processing chamber 2 can be conveniently discharged through the water discharge pipe 24, and the user can freely close and open the water discharge pipe 24 through the butterfly valve.

The cleaning mechanism comprises a connecting column 16, a cleaning brush 17, a supporting block 18, an annular groove 19, a driving motor 20, a worm 21 and a worm wheel 22, the connecting column 16 is positioned between a first filter screen 14 and a second filter screen 15, the cleaning brush 17 is fixed at two ends of the connecting column 16 through screws, bristles of the cleaning brush 17 are in contact with the first filter screen 14 and the second filter screen 15, the supporting block 18 is welded at two sides of the connecting column 16, the annular groove 19 is formed in the inner wall of the second treatment cavity 4, the supporting block 18 is rotatably sleeved in the annular groove 19 and can effectively support the connecting column 16 through the matching work of the supporting block 18 and the annular groove 19, the driving motor 20 is welded at the right side of the recycling box body 1, the driving motor 20 corresponds to the second treatment cavity 4, the worm 21 is in transmission connection with the output end of the driving motor 20, one end of the worm 21, which is far away from, worm wheel 22 is fixed to be cup jointed on spliced pole 16's outer wall, worm wheel 22 and worm 21 meshing work, and after tail gas recovery unit process long-time tail gas treatment work, first filter screen 14 and second filter screen 15 can probably be blockked up by the impurity that contains in the tail gas, accessible driving motor 20's operation this moment, it rotates to drive worm 21, it rotates to drive worm wheel 22, it rotates to drive spliced pole 16, it rotates to drive cleaning brush 17, accessible pivoted cleaning brush 17 cleans first filter screen 14 and second filter screen 15 this moment, it is blockked up by the impurity in the tail gas to avoid first filter screen 14 and second filter screen 15, avoid artifical manual to clear up first filter screen 14 and second filter screen 15 one by one, the efficiency of tail gas treatment is improved, and manpower is saved.

The tail gas recovery device comprises a movable door 25 hinged to one side of the outer portion of a recovery box body 1 through a hinge, an observation window 26 is arranged on the movable door 25, a sealing ring is arranged on the outer wall of the movable door 25 along the circumferential direction, a mounting mechanism comprises a stud 27, a fixing hole 28 and a fixing sleeve 29, the stud 27 is located at two ends of a first filter screen 14 and a second filter screen 15, the stud 27 is welded on the inner wall of a second processing cavity 4, the stud 27 is of an L-shaped structure, the fixing sleeve 29 is located at the bottom of two ends of the first filter screen 14 and the second filter screen 15, the fixing sleeve 29 is in threaded connection with the outer wall of the stud 27, the fixing sleeve 29 is in contact with the first filter screen 14 and the second filter screen 15, the diameter of the fixing sleeve 29 is larger than the diameter of the fixing hole 28, when the tail gas recovery device is subjected to long-time tail gas treatment work, the first filter screen 14 and the second filter screen 15 are likely to be worn or damaged, when the tail gas recovery device needs to be replaced, the tail gas, the movable door 25 can be opened by a user, the movable door 29 can be rotated, the fixing sleeve 29 can be fixed on the outer wall of the fixing sleeve 14, the fixing sleeve 14 when the stud 15, the tail gas recovery device 14 can be replaced by the fixing sleeve, the fixing sleeve 14 and the stud 15, the filter screen 14, the fixing sleeve 14 can be replaced by the fixing sleeve, the bolt 14, the fixing sleeve 15, the fixing sleeve 14 and the bolt 15, the fixing sleeve 14 can be replaced by the tail gas recovery device, the bolt 15, the tail gas recovery device 14, the filter screen 14, the tail gas recovery device 14 can be replaced by the tail gas recovery device, the second filter screen 14, the tail gas recovery device 14 and the tail gas recovery device, the filter screen 14 when the tail gas recovery device 14 can be replaced by the.

The right side of the recovery box body 1 is provided with a rotating groove, the inner wall of the rotating groove is provided with a sealing ring along the circumferential direction, the worm 21 is rotatably sleeved inside the rotating groove, the worm 21 can freely rotate through the rotating groove, and the sealing performance of the recovery box body 1 can be improved through the sealing ring.

The working principle is as follows: when a user needs to use the tail gas recovery device to treat tail gas generated by vacuum rectification, at this time, sufficient tail gas can be discharged into the first treatment cavity 2 through the air inlet pipe 23, at this time, treatment water liquid in the water storage cavity 6 can be pumped into the water delivery pipe 8 through the operation of the water pump 7, sufficient treatment water liquid is input into the water outlet pipe 9 through the water delivery pipe 8, at this time, treatment water liquid in the water outlet pipe 9 can be discharged through the spray head 10, at this time, tail gas in the first treatment cavity 2 can be treated by the treatment water liquid sprayed out of the spray head 10, and after the tail gas in the first treatment cavity 2 is treated by the treatment water liquid, at this time, tail gas in the first treatment cavity 2 can be pumped into the air exhaust pipe 12 through the operation of the exhaust fan 11, the tail gas in the first treatment cavity 2 can be discharged into the exhaust pipe 13 through the exhaust pipe 12, at this time, the exhaust pipe 13 can exhaust the tail gas in the first processing chamber 2 to the inside of the second processing chamber 4, at this time, the first filter screen 14 and the second filter screen 15 in the second processing chamber 4 can filter the tail gas in the second processing chamber 4, at this time, the tail gas after multiple processing will meet the corresponding exhaust standard, at this time, the tail gas meeting the exhaust standard can be exhausted through the exhaust pipe 30, and the water in the first processing chamber 2 can be conveniently exhausted through the drain pipe 24, through the butterfly valve, the user can freely close and open the drain pipe 24, and after the tail gas recovery device is subjected to long-time tail gas processing work, the first filter screen 14 and the second filter screen 15 may be blocked by impurities contained in the tail gas, at this time, the worm 21 can be driven to rotate by the operation of the driving motor 20, the worm wheel 22 is driven to rotate, the connecting column 16 is driven to rotate, the cleaning brush 17 is driven to rotate, the first filter screen 14 and the second filter screen 15 can be cleaned by the rotating cleaning brush 17 at the moment, the first filter screen 14 and the second filter screen 15 are prevented from being blocked by impurities in tail gas, the first filter screen 14 and the second filter screen 15 are prevented from being manually cleaned one by one, the efficiency of tail gas treatment is improved, manpower is saved, and after the tail gas recovery device is subjected to long-time tail gas treatment work, the first filter screen 14 and the second filter screen 15 are likely to be worn and damaged and need to be replaced, the movable door 25 can be opened by a user at the moment, the fixing sleeve 29 can be rotated at the moment, the fixing sleeve 29 is driven to be separated from the outer wall of the stud 27 through the thread matching work of the fixing sleeve 29 and the stud 27, and the first filter screen 14 and the second filter, through the matching work of the studs 27 and the fixing holes 28, a user can detach the first filter screen 14 and the second filter screen 15 to form the studs 27, so that the first filter screen 14 and the second filter screen 15 can be detached from the interior of the recycling box body 1, at the moment, the user can conveniently replace the first filter screen 14 and the second filter screen 15, when the user needs to install a new first filter screen 14 and a new second filter screen 15, the fixing holes 28 at the two ends of the first filter screen 14 and the second filter screen 15 can be aligned to the studs 27, when the studs 27 are sleeved in the fixing holes 28, the fixing sleeve 29 can be rotated, the fixing sleeve 29 is driven to enter the outer wall of the studs 27 through the matching work of the threads of the fixing sleeve 29 and the studs 27, when the fixing sleeve 29 is tightly attached to the first filter screen 14 and the second filter screen 15, the new first filter screen 14 and the new second filter screen 15 are fixed on the studs 27, at this time, the new first filter screen 14 and the new second filter screen 15 are fixed inside the recovery box body 1, and at this time, the user can continue to use the tail gas treatment device to recover and treat the tail gas, so that the cruising ability of the tail gas treatment device is improved.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (6)

1. The utility model provides a vacuum rectification tail gas recovery unit, includes retrieves box (1), its characterized in that, first treatment chamber (2), first installation cavity (3), second treatment chamber (4), second installation cavity (5) and water storage chamber (6) have been seted up to the inside of retrieving box (1), the inner wall welding of second installation cavity (5) has water pump (7) of vertical setting, the input of water pump (7) is connected with the one end of raceway (8), the other end of raceway (8) extends to the inside of water storage chamber (6), the output of water pump (7) is connected with the one end of outlet pipe (9), the other end of outlet pipe (9) extends to the inside of first treatment chamber (2) to be the closed form, outlet pipe (9) that are located the inside of first treatment chamber (2) bond on the inner wall at first treatment chamber (2) top, and is located and installs a plurality of shower nozzles (10) on outlet pipe (9) of first treatment chamber (2) inside, the inner wall fix with screw of first treatment chamber (3) has air exhauster (11) of vertical setting, the output of air exhauster (11) is connected with the one end of exhaust column (12), the other end of exhaust column (12) extends to the inside of first treatment chamber (2), the input of air exhauster (11) is connected with the one end of exhaust pipe (13), the other end of exhaust pipe (13) extends to the inside of second treatment chamber (4), the inside top-down of second treatment chamber (4) is equipped with first filter screen (14) and second filter screen (15) in proper order, the filtration pore of first filter screen (14) is greater than the filtration pore of second filter screen (15), the both ends of first filter screen (14) and second filter screen (15) all are equipped with installation mechanism, first filter screen (14) and second filter screen (15) are installed on the inner wall of second treatment chamber (4) through installation mechanism, be equipped with clean mechanism between first filter screen (14) and second filter screen (15), first filter screen (14) and second filter screen (15) are cleaned through clean mechanism.

2. The vacuum rectification tail gas recovery device according to claim 1, wherein the cleaning mechanism comprises a connecting column (16), a cleaning brush (17), a supporting block (18), an annular groove (19), a driving motor (20), a worm (21) and a worm gear (22), the connecting column (16) is positioned between a first filter screen (14) and a second filter screen (15), the cleaning brush (17) is fixed at two ends of the connecting column (16) through screws, bristles of the cleaning brush (17) are in contact with the first filter screen (14) and the second filter screen (15), the supporting block (18) is welded at two sides of the connecting column (16), the annular groove (19) is arranged on the inner wall of the second processing cavity (4), the supporting block (18) is rotatably sleeved in the annular groove (19), the driving motor (20) is welded at the right side of the recovery box body (1), and driving motor (20) are corresponding with second treatment chamber (4), worm (21) transmission is connected on the output of driving motor (20), the one end that driving motor (20) were kept away from in worm (21) is passed through the bearing transmission and is connected on the inner wall of second treatment chamber (4), worm wheel (22) are fixed to be cup jointed on the outer wall of spliced pole (16), worm wheel (22) and worm (21) meshing work.

3. The vacuum rectification tail gas recovery device according to claim 1, characterized in that an air inlet pipe (23) is arranged on one side of the top of the recovery box body (1), a water outlet pipe (24) is arranged below the air inlet pipe (23), a butterfly valve is arranged on the water outlet pipe (24), the air inlet pipe (23) and the water outlet pipe (24) correspond to the first treatment cavity (2), an exhaust pipe (30) is arranged on one side of the bottom of the recovery box body (1), and the exhaust pipe (30) corresponds to the second treatment cavity (4).

4. The vacuum rectification tail gas recovery device according to claim 1, characterized in that one side of the outside of the recovery box body (1) is hinged with a movable door (25) through a hinge, the movable door (25) is provided with an observation window (26), and the outer wall of the movable door (25) is provided with a sealing ring along the circumferential direction.

5. The vacuum rectification tail gas recovery device as claimed in claim 1, wherein the mounting mechanism comprises a stud (27), a fixing hole (28) and a fixing sleeve (29), the stud (27) is located at two ends of the first filter screen (14) and the second filter screen (15), the stud (27) is welded on the inner wall of the second processing cavity (4), the stud (27) is of an L-shaped structure, the fixing sleeve (29) is located at the bottom of two ends of the first filter screen (14) and the second filter screen (15), the fixing sleeve (29) is in threaded connection with the outer wall of the stud (27), the fixing sleeve (29) is in contact with the first filter screen (14) and the second filter screen (15), and the diameter of the fixing sleeve (29) is larger than the aperture of the fixing hole (28).

6. The vacuum rectification tail gas recovery device according to claim 2, characterized in that a rotating groove is formed in the right side of the recovery box body (1), a sealing ring is arranged on the inner wall of the rotating groove along the circumferential direction, and the worm (21) is rotatably sleeved in the rotating groove.

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