CN211725234U - Rectifying column tail gas purification system - Google Patents
Rectifying column tail gas purification system Download PDFInfo
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- CN211725234U CN211725234U CN202020180388.9U CN202020180388U CN211725234U CN 211725234 U CN211725234 U CN 211725234U CN 202020180388 U CN202020180388 U CN 202020180388U CN 211725234 U CN211725234 U CN 211725234U
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Abstract
The utility model discloses a rectification tower tail gas purification system, which comprises a rectification tower, a first-stage condenser, a second-stage condenser and a distillate storage tank, wherein the rectification tower is communicated with the first-stage condenser through a first-stage tail gas conveying pipe, the first-stage condenser is communicated with the second-stage condenser through a second-stage tail gas conveying pipe, and the distillate storage tank is communicated with the second-stage condenser through a purified gas conveying pipe; a return pipe is connected to the secondary tail gas feeding pipe, one end of the return pipe is communicated with the secondary tail gas feeding pipe, the other end of the return pipe is connected with the upper end of the rectifying tower, and a section of U-shaped pipe is arranged on the return pipe; the arrangement of the first-stage condenser and the second-stage condenser can separate dichloromethane contained in the tail gas, thereby avoiding the pollution of the tail gas to the environment; the arrangement of the return pipe and the U-shaped pipe realizes the recycling of the separated dichloromethane, saves resources and reduces the production cost; the utility model discloses simple structure, convenient operation is worth promoting.
Description
Technical Field
The utility model relates to a chemical production equipment technical field, specific theory especially relates to a rectifying column tail gas clean system.
Background
In chemical production, dichloromethane is widely used as a reaction medium and a solvent, and a product is separated from the dichloromethane solvent through a rectifying tower, wherein a large amount of tail gas containing the dichloromethane solvent is inevitably generated in the process. If the tail gas is discharged, the environment is polluted, production raw materials are wasted, and the production cost is increased. Therefore, it is necessary to produce a rectification column tail gas purification system in the technical field of chemical production equipment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a rectifying column tail gas clean system to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a rectification tower tail gas purification system comprises a rectification tower 1, a primary condenser 2, a secondary condenser 3 and a distillate storage tank 4, wherein a primary tail gas conveying pipe 10 is connected to the upper part of the rectification tower 1, the rectification tower 1 is communicated with the primary condenser 2 through the primary tail gas conveying pipe 10, a secondary tail gas feeding pipe 11 is connected to the upper end of the primary condenser 2, the primary condenser 2 is communicated with the secondary condenser 3 through the secondary tail gas feeding pipe 11, a purified gas conveying pipe 12 is connected to the outlet of the secondary condenser 3, and the distillate storage tank 4 is communicated with the secondary condenser 3 through the purified gas conveying pipe 12;
the secondary tail gas feeding pipe 11 is connected with a return pipe 13, one end of the return pipe 13 is communicated with the secondary tail gas feeding pipe 11, the other end of the return pipe 13 is connected with the upper end of the rectifying tower 1, and a section of U-shaped pipe 14 is arranged on the return pipe 13.
Preferably, a condensed water outlet 5 is arranged on one side of the upper end of the primary condenser 2, a condensed water inlet 6 is arranged on the other side of the lower end of the primary condenser 2, and ball valves 16 are arranged on the condensed water outlet 5 and the condensed water inlet 6.
Preferably, a chilled water outlet 7 is formed in one side of the upper end of the second-stage condenser 3, a chilled water inlet 8 is formed in the other side of the lower end of the second-stage condenser 3, and ball valves 16 are arranged on the chilled water outlet 7 and the chilled water inlet 8.
Preferably, a discharge pipe 9 is arranged on the distillate storage tank 4, a vent pipe 15 is arranged at the lowest point of the U-shaped pipe 14, and ball valves 16 are arranged on the discharge pipe 9, the purified gas conveying pipe 12 and the vent pipe 15.
Preferably, the temperature of the condensed water introduced from the condensed water inlet 6 is lower than 20 ℃.
Preferably, the temperature of the freezing water introduced from the freezing water inlet 8 is lower than 10 ℃.
Preferably, the first-stage condenser 2 is a shell and tube condenser, the second-stage condenser 3 is a spiral tube condenser, the shell of the second-stage condenser 3 is made of 304 stainless steel materials, and the spiral tube of the second-stage condenser 3 is a 316L stainless steel tube.
Has the advantages that: compared with the prior art, the beneficial effects of the utility model are that: the arrangement of the first-stage condenser and the second-stage condenser can separate dichloromethane contained in the tail gas, thereby avoiding the pollution of the tail gas to the environment; through the arrangement of the return pipe and the U-shaped pipe, the separated dichloromethane is recycled, resources are saved, and the production cost is reduced.
Drawings
Fig. 1 is the overall structure schematic diagram of a rectification column tail gas purification system provided by the utility model.
In the drawings: the system comprises a rectifying tower 1, a primary condenser 2, a secondary condenser 3, a distillate storage tank 4, a condensate outlet 5, a condensate inlet 6, a chilled water outlet 7, a chilled water inlet 8, a discharge pipe 9, a primary tail gas delivery pipe 10, a secondary tail gas delivery pipe 11, a purified gas delivery pipe 12, a return pipe 13, a U-shaped pipe 14, an emptying pipe 15 and a ball valve 16.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Examples
Referring to fig. 1, in an embodiment of the present invention, a rectification column tail gas purification system includes a rectification column 1, a first-stage condenser 2, a second-stage condenser 3 and a distillate storage tank 4, the upper portion of the rectification column 1 is connected with a first-stage tail gas delivery pipe 10, the rectification column 1 is communicated with the first-stage condenser 2 through the first-stage tail gas delivery pipe 10, the upper end of the first-stage condenser 2 is connected with a second-stage tail gas delivery pipe 11, the first-stage condenser 2 is communicated with the second-stage condenser 3 through the second-stage tail gas delivery pipe 11, the outlet of the second-stage condenser 3 is connected with a purified gas delivery pipe 12, and the distillate storage tank;
be connected with back flow 13 on the second grade tail gas conveying pipe 11, back flow 13 one end is linked together with second grade tail gas conveying pipe 11, and the other end is connected with the upper end of rectifying column 1, is provided with one section U-shaped pipe 14 on the back flow 13, and U-shaped pipe 14 can prevent that the gas of rectifying column 1 from directly getting into in the second grade condenser 3 through back flow 13 according to the principle of linker.
Furthermore, a condensed water outlet 5 is arranged on one side of the upper end of the first-stage condenser 2, a condensed water inlet 6 is arranged on the other side of the lower end of the first-stage condenser 2, and ball valves 16 are arranged on the condensed water outlet 5 and the condensed water inlet 6.
Further, one side of the upper end of the second-stage condenser 3 is provided with a chilled water outlet 7, the other side of the lower end of the second-stage condenser 3 is provided with a chilled water inlet 8, and ball valves 16 are arranged on the chilled water outlet 7 and the chilled water inlet 8.
Furthermore, a discharge pipe 9 is arranged on the distillate storage tank 4, a vent pipe 15 is arranged at the lowest point of the U-shaped pipe 14, and ball valves 16 are arranged on the discharge pipe 9, the purified gas delivery pipe 12 and the vent pipe 15.
Furthermore, the temperature of the condensed water introduced from the condensed water inlet 6 is lower than 20 ℃.
Furthermore, the temperature of the freezing water introduced from the freezing water inlet 8 is lower than 10 ℃.
Further, the first-stage condenser 2 is a shell-and-tube condenser, the second-stage condenser 3 is a spiral tube condenser, the shell of the second-stage condenser 3 is made of 304 stainless steel materials, and the spiral tube in the second-stage condenser 3 is made of 316L stainless steel tubes.
The use process comprises the following steps:
when the device is used, the tail gas generated by the rectifying tower 1 is condensed by the first-stage condenser 2 and the second-stage condenser 3, the dichloromethane is separated from the tail gas and flows back to the rectifying tower 1 through the return pipe 13 and the U-shaped pipe 14, the pollution of the tail gas to the environment is avoided, the resources are saved, and the production cost is reduced. The U-shaped tube 14 prevents the gas of the rectifying column 1 from directly entering the secondary condenser 3 through the return tube 13 according to the principle of a communicating vessel.
In the process, the arrangement of the first-stage condenser and the second-stage condenser can separate dichloromethane contained in the tail gas, so that the pollution of the tail gas to the environment is avoided; the arrangement of the return pipe and the U-shaped pipe realizes the recycling of the separated dichloromethane, saves resources and reduces the production cost; the application has the advantages of simple structure, strong practicability and simple operation and is worth popularizing.
The above is only the preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.
Claims (7)
1. The utility model provides a rectifying column tail gas clean-up system which characterized in that: the distillation tower comprises a distillation tower (1), a primary condenser (2), a secondary condenser (3) and a distillate storage tank (4), wherein a primary tail gas conveying pipe (10) is connected to the upper part of the distillation tower (1), the distillation tower (1) is communicated with the primary condenser (2) through the primary tail gas conveying pipe (10), a secondary tail gas conveying pipe (11) is connected to the upper end of the primary condenser (2), the primary condenser (2) is communicated with the secondary condenser (3) through the secondary tail gas conveying pipe (11), a purified gas conveying pipe (12) is connected to the outlet of the secondary condenser (3), and the distillate storage tank (4) is communicated with the secondary condenser (3) through the purified gas conveying pipe (12);
a return pipe (13) is connected to the secondary tail gas feeding pipe (11), one end of the return pipe (13) is communicated with the secondary tail gas feeding pipe (11), the other end of the return pipe is connected with the upper end of the rectifying tower (1), and a section of U-shaped pipe (14) is arranged on the return pipe (13).
2. The rectification column tail gas purification system according to claim 1, wherein: one side of the upper end of the primary condenser (2) is provided with a condensed water outlet (5), the other side of the lower end of the primary condenser (2) is provided with a condensed water inlet (6), and ball valves (16) are arranged on the condensed water outlet (5) and the condensed water inlet (6).
3. The rectification column tail gas purification system according to claim 1, wherein: one side of the upper end of the secondary condenser (3) is provided with a chilled water outlet (7), the other side of the lower end of the secondary condenser (3) is provided with a chilled water inlet (8), and ball valves (16) are arranged on the chilled water outlet (7) and the chilled water inlet (8).
4. The rectification column tail gas purification system according to claim 1, wherein: be provided with discharging pipe (9) on distillate storage tank (4), U-shaped pipe (14) the minimum is provided with blow-down pipe (15), all be provided with ball valve (16) on discharging pipe (9), purified gas conveyer pipe (12) and blow-down pipe (15).
5. The rectification column tail gas purification system according to claim 2, wherein: the temperature of the condensed water introduced from the condensed water inlet (6) is lower than 20 ℃.
6. The rectification column tail gas purification system according to claim 3, wherein: the temperature of the freezing water introduced from the freezing water inlet (8) is lower than 10 ℃.
7. The rectification column tail gas purification system according to claim 1, wherein: the condenser is characterized in that the first-stage condenser (2) is a shell-and-tube condenser, the second-stage condenser (3) is a spiral tube condenser, the shell of the second-stage condenser (3) is made of 304 stainless steel materials, and the spiral tube in the second-stage condenser (3) is a 316L stainless steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020180388.9U CN211725234U (en) | 2020-02-18 | 2020-02-18 | Rectifying column tail gas purification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020180388.9U CN211725234U (en) | 2020-02-18 | 2020-02-18 | Rectifying column tail gas purification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211725234U true CN211725234U (en) | 2020-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020180388.9U Active CN211725234U (en) | 2020-02-18 | 2020-02-18 | Rectifying column tail gas purification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211725234U (en) |
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2020
- 2020-02-18 CN CN202020180388.9U patent/CN211725234U/en active Active
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