CN111905550A - Vacuum pump tail gas treatment system - Google Patents
Vacuum pump tail gas treatment system Download PDFInfo
- Publication number
- CN111905550A CN111905550A CN202010621408.6A CN202010621408A CN111905550A CN 111905550 A CN111905550 A CN 111905550A CN 202010621408 A CN202010621408 A CN 202010621408A CN 111905550 A CN111905550 A CN 111905550A
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- China
- Prior art keywords
- vacuum pump
- tail gas
- spray
- liquid
- washing tower
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
Abstract
The invention provides a vacuum pump tail gas treatment system, which comprises a vacuum pump and a spray washing tower, wherein the spray washing tower is arranged in the vacuum pump; the spray washing tower is sequentially provided with an exhaust port, a liquid washing pipe, an air inlet and a liquid discharge pipe from the top to the bottom; the exhaust end of the vacuum pump is communicated with the air inlet; the spray washing tower is internally provided with a filler and a spray head, and a liquid washing pipe is communicated with the spray head; the filler is positioned between the spray head and the air inlet. In the spray washing tower, the high-temperature tail gas is closely contacted with the spray liquid on the surface of the filler in the upward flowing process to generate neutralization reaction, so that the content of organic waste gas in the high-temperature tail gas is gradually reduced, and the aim of purifying the high-temperature tail gas is fulfilled. The application provides a vacuum pump tail gas processing system can effectively handle vacuum pump exhaust contains organic matters such as lubricated oil gas, acetaldehyde, methane, non-methane hydrocarbons tail gas, and purification degree is high, and can change the lotion of different properties according to the tail gas composition of difference to reach fine purifying effect.
Description
Technical Field
The invention relates to the technical field of mechanical equipment, in particular to a vacuum pump tail gas treatment system.
Background
The BOPET film is a biaxially oriented polyester film. In the production process of the BOPET film, a vacuum pump is used for removing oligomers generated by high-temperature and oxidative degradation of materials in an extruder.
The vacuum pump refers to a device or equipment for obtaining vacuum by pumping a pumped container by using a mechanical, physical, chemical or physicochemical method. In general, a vacuum pump is a device for improving, generating and maintaining a vacuum in a certain closed space by various methods. In the process of removing the oligomer by the vacuum pump, tail gas containing organic matters such as lubricating oil gas, acetaldehyde, methane, non-methane hydrocarbons and the like of the vacuum pump can be generated. If the tail gas generated by the vacuum pump is directly discharged, the pollution to the atmosphere is caused, and the health of operating personnel is influenced.
According to the national environmental protection requirement, part of BOPET film manufacturers install a filter on an exhaust pipeline of a vacuum pump so as to achieve the purpose of purifying tail gas. The filter can only purify the tail gas of the vacuum pump within a period of time, and can lose activity after being used for a long time, so that the purpose of effectively filtering organic matters can not be achieved, and finally, the service life of equipment is short, and the equipment is easy to break down.
Disclosure of Invention
The invention provides a vacuum pump tail gas treatment system, which aims to solve the problem that the conventional treatment method cannot effectively filter organic matters.
The invention provides a vacuum pump tail gas treatment system, which comprises a vacuum pump and a spray washing tower, wherein the spray washing tower is arranged in the vacuum pump;
the spray washing tower is sequentially provided with an exhaust port, a liquid washing pipe, an air inlet and a liquid discharging pipe from the top to the bottom; the exhaust end of the vacuum pump is communicated with the air inlet;
the spray washing tower is internally provided with a filler and a spray head, and the liquid washing pipe is communicated with the spray head;
the filler is located between the spray head and the air inlet.
Preferably, the packing is a Raschig ring or a pall ring.
Preferably, the packing is 304 stainless steel pall rings.
Preferably, the washing liquid in the washing liquid pipe is determined according to the property of the tail gas discharged from the exhaust end of the vacuum pump.
Preferably, the tail gas discharged from the exhaust end of the vacuum pump is acidic waste gas, and the washing liquid pipe is internally circulated with alkali liquid.
Preferably, the tail gas discharged from the exhaust end of the vacuum pump is alkaline waste gas, and acid liquor flows through the washing liquid pipe.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
the invention provides a vacuum pump tail gas treatment system, which comprises a vacuum pump and a spray washing tower, wherein the spray washing tower is arranged in the vacuum pump; the spray washing tower is sequentially provided with an exhaust port, a liquid washing pipe, an air inlet and a liquid discharging pipe from the top to the bottom; the exhaust end of the vacuum pump is communicated with the air inlet; the spray washing tower is internally provided with a filler and a spray head, and the liquid washing pipe is communicated with the spray head; the filler is located between the spray head and the air inlet. In the spray washing tower, the high-temperature tail gas is closely contacted with the spray liquid on the surface of the filler in the upward flowing process to generate neutralization reaction, so that the content of organic waste gas in the high-temperature tail gas is gradually reduced, and the aim of purifying the high-temperature tail gas is fulfilled. The application provides a vacuum pump tail gas processing system can effectively handle vacuum pump exhaust contains the tail gas of organic matters such as vacuum pump lubrication oil gas, acetaldehyde, methane, non-methane hydrocarbons, and purification degree is high, and can change the lotion of different properties according to the tail gas composition of difference to reach fine purifying effect. The application provides a vacuum pump tail gas processing system simple structure, easy operation can resources are saved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic structural diagram of an exhaust gas treatment system of a vacuum pump according to an embodiment of the present invention;
the symbols represent:
1-vacuum pump, 2-spray washing tower, 3-exhaust port, 4-liquid washing pipe, 5-air inlet, 6-liquid discharge pipe, 7-filler and 8-spray head.
Detailed Description
Referring to fig. 1, fig. 1 shows a schematic structural diagram of a vacuum pump tail gas treatment system according to an embodiment of the present application. As shown in fig. 1, the vacuum pump tail gas treatment system provided by the embodiment of the present application includes a vacuum pump 1 and a spray scrubber 2, and the vacuum pump 1 is communicated with the spray scrubber 2.
Specifically, the vacuum pump 1 is a device for removing oligomers generated by high-temperature and oxidative degradation of materials in an extruder in the production process of the BOPET film. Thus, the vacuum pump 1 communicates with the exhaust end of the extruder to receive the exhaust gas discharged from the extruder.
The spray scrubber 2 is a device for treating the exhaust gas discharged from the vacuum pump 1. The spray washing tower 2 in the embodiment of the application is sequentially provided with an exhaust port 3, a liquid washing pipe 4, an air inlet 5 and a liquid discharging pipe 6 from the top to the bottom. Wherein, the exhaust port 3 is an exhaust part of gas generated after the tail gas of the vacuum pump 1 is treated by the spray washing tower 2. The liquid washing pipe 4 is a part where external washing liquid enters the spray washing tower 2. The gas inlet 5 is a part where the tail gas exhausted by the vacuum pump 1 enters the spray washing tower 2, and therefore, the exhaust end of the vacuum pump 1 is communicated with the gas inlet 5. The liquid discharge pipe 6 is a part for discharging waste liquid generated after the tail gas of the vacuum pump 1 is treated by the spray washing tower 2.
The spray washing tower 2 is internally provided with a filler 7 and a spray head 8. The spray head 8 is communicated with the liquid washing pipe 4, so that the washing liquid enters the spray washing tower 2 through the liquid washing pipe 4 and then is sprayed inside the spray washing tower 2 through the spray head 8 to form the spray liquid. In the present embodiment, the filler 7 is located between the shower head 8 and the gas inlet 5. Therefore, after the tail gas exhausted by the vacuum pump 1 enters the spray washing tower 2 through the air inlet 5, the tail gas can be contacted with the washing liquid sprayed by the spray head 8 on the packing 7, and the tail gas exhausted by the vacuum pump 1 is treated by the washing liquid.
In the embodiment of the application, the packing 7 is a Raschig ring or a pall ring so as to realize the reverse contact of the tail gas and the spray liquid. The pall ring packing has the advantages of large flux, large gas-liquid contact area, small pressure drop, small resistance, high separation efficiency, large operation elasticity and the like, the structure improves gas-liquid distribution, makes full use of the inner surface of the ring, and the treatment capacity of the contact surface can be 50-100 percent larger than that of the Raschig ring under the same pressure drop. Under the same treatment capacity, the pressure drop is 50-70% smaller than that of Raschig ring in the pressure reduction treatment, and the mass transfer efficiency can be improved by about 20%. The adoption of the pall ring can save 20 to 40 percent of the filling volume compared with the Raschig ring. Therefore, in the present embodiment, preferably, pall rings are used as the packing 7. The pall ring packing is made of three preparation materials of metal, plastic and ceramic, such as metal materials of 304, 316L, carbon steel, 201 and the like, and plastic materials of PP, RPP, CPVC, PVDF, PVC and the like. The 304 stainless steel pall ring packing has the characteristics of high structural strength, corrosion resistance and high temperature resistance, so the 304 stainless steel pall ring is preferably selected in the embodiment of the application.
The lotion of liquid washing pipe 4 transmission and 8 spun shower nozzles according to vacuum pump 1 exhaust end exhaust tail gas nature in the embodiment of this application confirms to change the lotion of different nature, and then reach the purpose of effective purification. For example, when the tail gas discharged from the exhaust end of the vacuum pump 1 is acidic waste gas, alkali liquid such as sodium hydroxide flows through the liquid washing pipe 4, so that the tail gas and the spray liquid undergo neutralization reaction in the process of close contact, and the purpose of treating organic matters such as vacuum pump lubrication oil gas, acetaldehyde, methane, non-methane hydrocarbons and the like in the waste gas is achieved. Similarly, when the exhaust gas discharged from the exhaust end of the vacuum pump 1 is alkaline exhaust gas, an acid solution such as hydrochloric acid flows through the liquid washing pipe 4.
The working principle and the process of the vacuum pump tail gas treatment system provided by the embodiment of the application are as follows:
high-temperature tail gas containing organic matters such as vacuum pump lubricating oil gas, acetaldehyde, methane, non-methane hydrocarbons and the like discharged from the exhaust end of the vacuum pump 1 enters the interior of the spray washing tower 2 through a gas inlet 5 positioned at the lower end of the spray washing tower 2. Meanwhile, the washing liquid enters the interior of the spray washing tower 2 through the washing liquid pipe 4 and is sprayed on the packing 7 through the spray head 8. The high-temperature tail gas runs from bottom to top in the spray washing tower 2, and when passing through the filler 7, the high-temperature tail gas is closely contacted with the spray liquid on the surface of the filler 7. In the process that the high-temperature tail gas is in close contact with the spraying liquid on the surface of the filler 7, the high-temperature tail gas and the spraying liquid are subjected to neutralization reaction on the surface of the filler 7, so that the content of the organic waste gas in the rising high-temperature tail gas is gradually reduced, and the purpose of purifying the high-temperature tail gas is achieved. When the high-temperature tail gas reaches the exhaust port 3, the content of organic matters in the high-temperature tail gas meets the requirement of environmental protection emission, and then the high-temperature tail gas is exhausted from the exhaust port 3, so that pollution-free emission is achieved. After absorbing organic matters in the high-temperature tail gas, the spray liquid is discharged to a waste liquid pool through a liquid discharge pipe 6.
The vacuum pump tail gas processing system that this application embodiment provided can effectively handle 1 exhaust tail gas that contains organic matters such as vacuum pump lubrication oil gas, acetaldehyde, methane, non-methane hydrocarbons of vacuum pump, and purification degree is high, and can change different nature's lotion according to the tail gas composition of difference to reach fine purifying effect. The vacuum pump tail gas treatment system provided by the embodiment of the application is simple in structure and easy to operate, and can save resources.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The invention is not limited to the precise arrangements described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (6)
1. A vacuum pump tail gas treatment system is characterized by comprising a vacuum pump (1) and a spray washing tower (2);
the spray washing tower (2) is sequentially provided with an exhaust port (3), a liquid washing pipe (4), an air inlet (5) and a liquid discharge pipe (6) from the top to the bottom; the exhaust end of the vacuum pump (1) is communicated with the air inlet (5);
a filler (7) and a spray head (8) are arranged inside the spray washing tower (2), and the liquid washing pipe (4) is communicated with the spray head (8);
the filler (7) is located between the spray head (8) and the air inlet (5).
2. Vacuum pump off-gas treatment system according to claim 1, characterized in that the packing (7) is a Raschig ring or a pall ring.
3. Vacuum pump off-gas treatment system according to claim 2, characterized in that the packing (7) is 304 stainless steel pall ring.
4. A vacuum pump off-gas treatment system according to claim 1, characterized in that the wash liquid in the wash liquid pipe (4) is determined according to the properties of the off-gas discharged from the exhaust of the vacuum pump (1).
5. A vacuum pump tail gas treatment system according to claim 4, characterized in that the tail gas discharged from the exhaust end of the vacuum pump (1) is an acid waste gas, and a lye is flowed through the liquid washing pipe (4).
6. A vacuum pump tail gas treatment system according to claim 4, characterized in that the tail gas discharged from the exhaust end of the vacuum pump (1) is alkaline waste gas, and acid liquor flows through the liquid washing pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010621408.6A CN111905550A (en) | 2020-06-30 | 2020-06-30 | Vacuum pump tail gas treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010621408.6A CN111905550A (en) | 2020-06-30 | 2020-06-30 | Vacuum pump tail gas treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111905550A true CN111905550A (en) | 2020-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010621408.6A Pending CN111905550A (en) | 2020-06-30 | 2020-06-30 | Vacuum pump tail gas treatment system |
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| Country | Link |
|---|---|
| CN (1) | CN111905550A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206652359U (en) * | 2017-03-09 | 2017-11-21 | 湖北绿色家园材料技术股份有限公司 | A kind of tail gas of vacuum gas pump spray system |
| CN206897132U (en) * | 2017-07-13 | 2018-01-19 | 凯恩德利(北京)科贸有限公司 | A kind of high-efficiency environment friendly scrubbing tower |
-
2020
- 2020-06-30 CN CN202010621408.6A patent/CN111905550A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206652359U (en) * | 2017-03-09 | 2017-11-21 | 湖北绿色家园材料技术股份有限公司 | A kind of tail gas of vacuum gas pump spray system |
| CN206897132U (en) * | 2017-07-13 | 2018-01-19 | 凯恩德利(北京)科贸有限公司 | A kind of high-efficiency environment friendly scrubbing tower |
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Application publication date: 20201110 |