Acetone tail gas recovery device for vacuum rectification

Abstract

The utility model relates to the technical field of vacuum rectification, and discloses an acetone tail gas recovery device for vacuum rectification, which comprises a rectifying tower, a reboiler is communicated and connected with the outer wall of one side of the rectifying tower, a gas pipe I is fixedly connected with the outer surface of the upper end of the rectifying tower, and a condenser is fixedly connected with the outer surface of the other end of the gas pipe I; the outer wall of the lower end of the condenser is fixedly connected with a second gas pipe, and the outer surface of one side of the second gas pipe is communicated and connected with a backflow pipe and a flow meter. When the device is used, acetone gas can be rapidly cooled in the cooling process through the arranged cooling assembly, the boiling point of the acetone gas can be reduced, and the acetone gas can be rapidly cooled; the problems that acetone gas directly enters the vacuum pump and then is discharged to a tail gas system, so that the concentration of organic matter in the tail gas system is increased, environmental protection facilities frequently alarm and interlock, materials are consumed and the like are solved, the acetone gas contained in the tail gas of the vacuum pump is fully collected, and better use prospects can be brought.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum distillation, in particular to an acetone tail gas recovery device for vacuum distillation. Background Art

[0002] The principle of the vacuum distillation tower is to lower the boiling point of the liquid by reducing the operating pressure, thereby achieving the separation of liquid mixtures. Vacuum distillation, also known as vacuum distillation, is a physical separation process. Its basic principle is similar to that of atmospheric distillation, but the key is to reduce the pressure at the top of the tower to several thousand Pascals through vacuum equipment, thereby significantly lowering the boiling point of the liquid.

[0003] However, it still has some disadvantages. For example, during the vacuum distillation process of acetone, the dew point of acetone is lower, resulting in a large amount of acetone being unable to be condensed in the condenser and exhaust gas cooler. This gas directly enters the vacuum pump and is then discharged into the exhaust system, causing a series of problems such as increased organic matter concentration in the exhaust system, frequent alarm interlocks of environmental protection facilities, and material loss. In addition, the cooler installed will be affected by the external ambient temperature, and the cooling effect will be greatly reduced.

[0004] In order to solve the above problems, the present application proposes an acetone tail gas recovery device for vacuum distillation. Utility Model Content

[0005] The purpose of the utility model is to provide an acetone tail gas recovery device for vacuum distillation to solve the problems mentioned in the above background art, such as the acetone in the distillation tower is condensed in the condenser and tail gas cooler in the prior art, the gas directly enters the vacuum pump and is then discharged into the tail gas system, causing a series of problems such as increased organic matter concentration in the tail gas system, frequent alarm interlocks of environmental protection facilities, and material loss, and the cooler is affected by the external ambient temperature, which greatly reduces the cooling effect.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an acetone tail gas recovery device for vacuum distillation, comprising a distillation tower, an outer wall of one side of the distillation tower is connected to a reboiler, an upper end outer surface of the distillation tower is fixedly connected to an air pipe 1, the other end outer surface of the air pipe 1 is fixedly connected to a condenser, an outer wall of the lower end of the condenser is fixedly connected to an air pipe 2, an outer surface of one side of the air pipe 2 is connected to a reflux pipe and a flow meter, and the reflux pipe is located on one side of the flow meter, and the outer surface of the other end of the reflux pipe is connected to an outer surface of one side of the distillation tower, an outer surface of one end of the lower end of the air pipe 2 is fixedly connected to a cooling assembly, an outer wall of the lower end of the cooling assembly is fixedly connected to an air pipe 3 and a storage tank, and the air pipe 3 is located on the upper end outer surface of the storage tank, an outer surface of one side of the cooling assembly is fixedly connected to an air pipe 4 and a vacuum pump, and the air pipe 4 is located on an outer surface of one side of the vacuum pump.

[0007] Preferably, the cooling assembly includes a cold water pipe 1, a cold water storage tank, a constant temperature tank, a heat dissipation net, a connecting rod, a fixing plate, an air pipe 5, a cold water pipe 2, a cooler 1, an air pipe 6, a cooler 2, a cold water pipe 3, a cold water pipe 4, an air intake pipe, a fan blade and a drive motor. The cold water pipe 1 is connected to the cold water storage tank and is connected to the upper outer wall of the constant temperature tank. The outer surface of one side of the constant temperature tank is fixedly connected to a heat dissipation net.

[0008] Preferably, a connecting rod is fixedly connected to the inner surface of the thermostatic tank, and a fixing plate is fixedly connected to the outer surface of one side of the connecting rod.

[0009] Preferably, the outer surface of the lower end of the air pipe five is fixedly connected to the air pipe five, the outer surface of the lower end of the air pipe five is fixedly connected to the cooler one, and the cold water pipe two and the cold water pipe one are interconnected, and the outer surface of the other side of the cooler one is fixedly connected to the cold water pipe three.

[0010] Preferably, the outer wall of one side of the air pipe five is connected to the air pipe six, the outer surface of one end of the air pipe six is ​​connected to the cooler two, and the outer surface of one side of the cooler two is fixedly connected to the cold water pipe three, and the cold water pipe three is connected to the outer wall of one side of the cooler one, and the outer surface of the other side of the cooler two is fixedly connected to the cold water pipe four.

[0011] Preferably, the outer surface of the lower end of the thermostatic tank is fixedly connected to an air inlet pipe, the outer surface of the middle part of one side of the fixed plate is fixedly connected to a fan blade, and the outer surface of one side of the fan blade is movably connected to a drive motor.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model provides a cooling component, wherein acetone is first placed in a distillation tower, heated by a reboiler to form gas, a vacuum pump is started, and the formed gas is transported to a condenser for cooling under the action of the vacuum pump, moisture and impurities in the acetone are separated, the separated acetone gas is transported to a first cooler and a second cooler in a constant temperature tank, cooled again, the boiling point of the acetone is reduced, the acetone is formed into a liquid state, and stored in a storage tank; while the acetone gas is cooled in the first cooler and the second cooler, a driving motor is started, and the rotation of the driving motor drives the fan blades to rotate at a high speed, so that the constant temperature tank is always in a low temperature environment, the cooling efficiency is improved during the cooling process, and the acetone gas can be quickly cooled during the cooling process, the boiling point of the acetone gas is reduced, and the acetone gas is reduced from directly entering the vacuum pump and then being discharged into the tail gas system, thereby causing problems such as increased organic matter concentration in the tail gas system, frequent alarm interlocking of environmental protection facilities, and material loss, and the acetone gas contained in the tail gas of the vacuum pump is fully collected. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of an acetone tail gas recovery device for vacuum distillation according to the present invention;

[0015] Figure 2 This is a schematic diagram of the internal structure of an acetone tail gas recovery device for vacuum distillation according to the present invention;

[0016] Figure 3 This is a schematic structural diagram of a cooling assembly in an acetone tail gas recovery device for vacuum distillation according to the present invention;

[0017] Figure 4 The utility model is a partial structural schematic diagram of a cooling component in an acetone tail gas recovery device for vacuum distillation.

[0018] In the figure: 1. Distillation tower; 2. Reboiler; 3. Gas pipe 1; 4. Condenser; 5. Gas pipe 2; 6. Reflux pipe; 7. Flow meter; 8. Cooling assembly; 9. Gas pipe 3; 10. Storage tank; 11. Gas pipe 4; 12. Vacuum pump; 13. Cold water pipe 1; 14. Cold water storage tank; 15. Constant temperature tank; 16. Heat dissipation net; 17. Connecting rod; 18. Fixing plate; 19. Gas pipe 5; 20. Cold water pipe 2; 21. Cooler 1; 22. Gas pipe 6; 23. Cooler 2; 24. Cold water pipe 3; 25. Cold water pipe 4; 26. Inlet pipe; 27. Fan blade; 28. Drive motor. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figures 1-4The utility model provides a technical solution: an acetone tail gas recovery device for vacuum distillation, comprising a distillation tower 1, an outer wall of one side of the distillation tower 1 is connected to a reboiler 2, an upper end outer surface of the distillation tower 1 is fixedly connected to a gas pipe 3, an outer surface of the other end of the gas pipe 3 is fixedly connected to a condenser 4, an outer wall of the lower end of the condenser 4 is fixedly connected to a gas pipe 2 5, an outer surface of one side of the gas pipe 2 5 is connected to a reflux pipe 6 and a flow meter 7, and the reflux pipe 6 is located on one side of the flow meter 7, and the outer surface of the other end of the reflux pipe 6 is fixedly connected to a condenser 4, and an outer wall of the lower end of the condenser 4 is fixedly connected to a gas pipe 2 5. The surface is connected to the outer surface of one side of the distillation tower 1, the outer surface of the lower end of the air pipe 2 5 is fixedly connected to the cooling component 8, the lower end outer wall of the cooling component 8 is fixedly connected to the air pipe 3 9 and the storage tank 10, and the air pipe 3 9 is located on the upper end outer surface of the storage tank 10, the outer surface of one side of the cooling component 8 is fixedly connected to the air pipe 4 11 and the vacuum pump 12, and the air pipe 4 11 is located on the outer surface of one side of the vacuum pump 12, and the vacuum pump 12 is set therein to introduce the evaporated gas into the condenser 4 and the cooling component 8.

[0021] In this embodiment, Figure 2-Figure 4 As shown, the cooling assembly 8 includes a cold water pipe 13, a cold water storage tank 14, a constant temperature tank 15, a heat dissipation net 16, a connecting rod 17, a fixing plate 18, an air pipe 5 19, a cold water pipe 20, a cooler 21, a air pipe 6 22, a cooler 23, a cold water pipe 3 24, a cold water pipe 4 25, an air inlet pipe 26, a fan blade 27 and a drive motor 28. The cold water pipe 13 is communicated with the cold water storage tank 14 and is connected to the upper outer wall of the constant temperature tank 15. The outer surface of one side of the constant temperature tank 15 is fixedly connected with the heat dissipation net 16. By setting the constant temperature tank 15, the external temperature of the cooler 1 21 and the cooler 2 23 can be kept in a certain low temperature environment. The inner surface of the constant temperature tank 15 is fixedly connected with a connecting rod 17. The outer surface of one side of the connecting rod 17 is fixedly connected with a fixing plate 18. By setting the fixing plate 18, it is convenient for us to install the drive motor 28 in the inner cavity of the constant temperature tank 15. The outer surface of the lower end of the air pipe 2 5 is fixedly connected with The outer surface of the lower end of the air pipe 5 19 is fixedly connected to the cooler 1 21, and the cold water pipe 2 20 is connected to the cold water pipe 1 13. The outer surface of the other side of the cooler 1 21 is fixedly connected to the cold water pipe 3 24. The outer wall of one side of the air pipe 5 19 is connected to the air pipe 6 22. The outer surface of one end of the air pipe 6 22 is connected to the cooler 23, and the outer surface of one side of the cooler 23 is fixedly connected to the cold water pipe 3 24. The cold water pipe 3 24 is fixedly connected to the outer surface of the cooler 23. One side outer wall of the cooler 1 21 is connected to the other side outer surface of the cooler 2 23 and is fixedly connected to a cold water pipe 4 25. The lower end outer surface of the thermostatic tank 15 is fixedly connected to an air intake pipe 26. The outer surface of the middle part of one side of the fixed plate 18 is fixedly connected to a fan blade 27. The outer surface of one side of the fan blade 27 is movably connected to a drive motor 28. The fan blade 27 can be arranged to quickly extract the heat emitted from the thermostatic tank 15 out of the thermostatic tank 15.

[0022] An acetone tail gas recovery device for vacuum distillation, when the distillation tower 1 is in operation, first, acetone is placed in the distillation tower 1, and then heated by the reboiler 2 to form gas, and the vacuum pump 12 is started. Under the action of the vacuum pump 12, the formed gas is transported to the condenser 4 for cooling, and the water and impurities in the acetone are separated. Then, the separated acetone gas is cooled again in the cooler 1 21 and the cooler 2 23 in the constant temperature tank 15 through the provided cooling component 8, thereby reducing the boiling point of the acetone, so that the acetone is converted into liquid, and stored in the storage tank 10. At the same time, the acetone gas is cooled in the cooler 1 21 and the cooler 2 23 in the constant temperature tank 15. When cooling is performed in the cooler 23, the drive motor 28 is started. Under the rotation of the drive motor 28, the fan blades 27 are driven to rotate at a high speed, so that the constant temperature tank 15 is always in a low temperature environment, so that the cooling efficiency is improved during the cooling process, so that the acetone gas can be quickly cooled during the cooling process, the boiling point of the acetone gas is lowered, and the acetone gas is reduced from directly entering the vacuum pump 12 and then being discharged into the exhaust system, causing problems such as increased organic matter concentration in the exhaust system, frequent alarm interlocks of environmental protection facilities, and material loss. The acetone gas contained in the exhaust gas of the vacuum pump 12 is fully collected.

[0023] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. An acetone tail gas recovery device for vacuum distillation, comprising a distillation tower (1), characterized in that: The outer wall of one side of the distillation tower (1) is connected to a reboiler (2), the outer surface of the upper end of the distillation tower (1) is fixedly connected to a gas pipe (3), the outer surface of the other end of the gas pipe (3) is fixedly connected to a condenser (4), the outer wall of the lower end of the condenser (4) is fixedly connected to a gas pipe (5), the outer surface of one side of the gas pipe (5) is connected to a reflux pipe (6) and a flow meter (7), and the reflux pipe (6) is located on one side of the flow meter (7), and the outer surface of the other end of the reflux pipe (6) is fixedly connected to a condenser (4), and the outer surface of the other end of the reflux pipe (6) is fixedly connected to a condenser (4), and the outer surface of the lower end of the condenser (4) is fixedly connected to a gas pipe (5), and the outer surface of one side of the gas pipe (5) is connected to a reflux pipe (6) and a flow meter (7), and the reflux pipe (6) is located on one side of the flow meter (7), and the outer surface of the other end of the reflux pipe (6) is fixedly connected to a condenser (4), and the outer surface of the other end of the reflux pipe (6) is fixedly connected to a condenser (4), and the outer surface of the other end of the condenser (4 ... The surface is connected to the outer surface of one side of the distillation tower (1), the outer surface of one end of the lower end of the gas pipe 2 (5) is fixedly connected to the cooling component (8), the outer wall of the lower end of the cooling component (8) is fixedly connected to the gas pipe 3 (9) and the storage tank (10), and the gas pipe 3 (9) is located on the outer surface of the upper end of the storage tank (10), the outer surface of one side of the cooling component (8) is fixedly connected to the gas pipe 4 (11) and the vacuum pump (12), and the gas pipe 4 (11) is located on the outer surface of one side of the vacuum pump (12).

2. The acetone tail gas recovery device for vacuum distillation according to claim 1, wherein: The cooling assembly (8) includes a cold water pipe (13), a cold water storage tank (14), a constant temperature tank (15), a heat dissipation net (16), a connecting rod (17), a fixing plate (18), an air pipe (19), a cold water pipe (20), a cooler (21), an air pipe (22), a cooler (23), a cold water pipe (3) (24), a cold water pipe (4) (25), an air inlet pipe (26), a fan blade (27) and a drive motor (28). The cold water pipe (13) is connected to the cold water storage tank (14) and is connected to the upper outer wall of the constant temperature tank (15). The outer surface of one side of the constant temperature tank (15) is fixedly connected to the heat dissipation net (16).

3. A vacuum distillation acetone tail gas recovery device according to claim 2, characterized in that: A connecting rod (17) is fixedly connected to the inner surface of the constant temperature tank (15), and a fixing plate (18) is fixedly connected to the outer surface of one side of the connecting rod (17).

4. The acetone tail gas recovery device for vacuum distillation according to claim 2, wherein: The outer surface of the lower end of the air pipe 2 (5) is fixedly connected to the air pipe 5 (19), the outer surface of the lower end of the air pipe 5 (19) is fixedly connected to the cooler 1 (21), and the cold water pipe 2 (20) and the cold water pipe 1 (13) are interconnected, and the outer surface of the other side of the cooler 1 (21) is fixedly connected to the cold water pipe 3 (24).

5. The acetone tail gas recovery device for vacuum distillation according to claim 2, wherein: One side outer wall of the air pipe five (19) is connected to the air pipe six (22), one end outer surface of the air pipe six (22) is connected to the cooler two (23), and one side outer surface of the cooler two (23) is fixedly connected to the cold water pipe three (24), and the cold water pipe three (24) is connected to one side outer wall of the cooler one (21), and the other side outer surface of the cooler two (23) is fixedly connected to the cold water pipe four (25).

6. The acetone tail gas recovery device for vacuum distillation according to claim 2, characterized in that: An air inlet pipe (26) is fixedly connected to the outer surface of the lower end of the thermostatic tank (15), a fan blade (27) is fixedly connected to the outer surface of the middle portion of one side of the fixed plate (18), and a drive motor (28) is movably connected to the outer surface of one side of the fan blade (27).

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