CN213790769U - Triethylene glycol rectifying column tail gas treatment system - Google Patents
Triethylene glycol rectifying column tail gas treatment system Download PDFInfo
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- CN213790769U CN213790769U CN202022435105.3U CN202022435105U CN213790769U CN 213790769 U CN213790769 U CN 213790769U CN 202022435105 U CN202022435105 U CN 202022435105U CN 213790769 U CN213790769 U CN 213790769U
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Abstract
The utility model provides a triethylene glycol rectification column tail gas processing system relates to the environmental protection field. The system is used for treating the tail gas discharged from the rectifying column and comprises an air cooler, a gas-liquid separator, a fuel gas buffer tank, a sewage pump and a pressure control system; the air inlet of the air cooler is connected with the tail gas outlet of the rectifying column; the air inlet of the gas-liquid separator is connected with the air outlet of the air cooler; the gas buffer tank and the sewage pump are respectively connected with the top and the bottom of the gas-liquid separator; the control system comprises a controller, a pressure regulating valve, a pressure transmitter, a liquid level control device and an electromagnetic valve; the system can recycle the emptied part of combustible gas as fuel through the gas buffer tank, thereby reducing the loss of natural gas; the air with odor can be combusted, the odor of the air can be reduced, and the air quality can be protected; the system can control the liquid in the gas-liquid separator through the liquid level control device, so that the normal operation of the system is ensured; the whole structure is simple, and the stability is good.
Description
Technical Field
The utility model relates to an environmental protection and chemical machinery field, concretely relates to triethylene glycol rectification column tail gas treatment system.
Background
As the tail gas of the triethylene glycol rectification column contains part of hydrocarbon gas and triethylene glycol degradation substances, if the tail gas is directly discharged into the atmosphere without being treated, the acid odor of the tail gas is large, and the air quality of the surrounding environment is seriously influenced.
The traditional mode of tail gas treatment is to directly treat the tail gas by using an incinerator, and the tail gas is discharged after being incinerated by introducing a stream of fuel gas, and the mode has large floor area (the volume of the incinerator is generally 24 m)2) High investment, high consumption and need of extra fuel gas.
Patent CN109847545A discloses a triethylene glycol regeneration pry tail gas treatment device and a treatment method, which can mix and pressurize the normal pressure tail gas to ensure complete combustion, and an incinerator is not required to be arranged, so that the problems are well solved; however, the processing device disclosed in this patent does not recover hydrocarbon gas in the tail gas, and does not disclose a pressure control method and a liquid level control method, and is not a self-control scheme.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a system is stable, can retrieve the gaseous and environment-friendly triethylene glycol rectification column tail gas treatment system of combustible hydrocarbon. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the triethylene glycol rectifying column tail gas treatment system is used for treating tail gas discharged by a rectifying column and comprises an air cooler, a gas-liquid separator, a fuel gas buffer tank, a sewage pump and a pressure control system; wherein:
the air inlet of the air cooler is connected with the tail gas outlet of the rectifying column; the air inlet of the gas-liquid separator is connected with the air outlet of the air cooler; the bottom of the gas-liquid separator is provided with a water outlet, the top of the gas-liquid separator is provided with an air outlet, and the water outlet is connected with a water inlet of a sewage pump; the gas pipeline is connected with the exhaust port at one end; one end of the gas pipeline is connected with the middle part of the exhaust pipeline, and the other end of the gas pipeline is connected with the gas inlet of the gas buffer tank; the control system comprises a controller, a pressure regulating valve, a pressure transmitter, a liquid level control device and an electromagnetic valve, wherein the pressure regulating valve is connected with the other end of the exhaust pipeline in parallel, the pressure transmitter is connected with the pressure regulating valve in series, and the pressure transmitter and the pressure regulating valve are both connected with the controller; the liquid level control device is arranged on the gas-liquid separator, the electromagnetic valve is arranged at a water outlet of the sewage pump, and the liquid level control device, the sewage pump and the electromagnetic valve are all connected with the controller.
Optionally or preferably, a refrigerating fan is arranged at the air outlet of the air cooler.
Optionally or preferably, the gas buffer tank is provided with a rupture disk and an automatic emptying valve.
Based on the technical scheme, the following technical effects can be generated:
triethylene glycol rectification column tail gas processing system, overall structure is simple, operation convenient to use, stability is good, the reliability is high. The system can recycle the emptied part of combustible gas as fuel through the gas buffer tank, thereby reducing the loss of natural gas; the system can burn the air with odor, reduce the peculiar smell of the air and protect the air quality; the system can control the liquid in the gas-liquid separator through the liquid level control device, and the normal operation of the system is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic flow chart of the present invention;
FIG. 2 is a top view of the present invention showing the spatial distribution;
in the figure: 1-an air cooler; 2-a gas-liquid separator; 3-a liquid level control device; 4-a sewage pump; 5-an electromagnetic valve; 6-a gas buffer tank; 7-a pressure transmitter; 8-pressure regulating valve; 9-a controller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.
As shown in fig. 1-2:
the utility model provides a triethylene glycol rectification column tail gas treatment system, which is used for treating tail gas discharged from a rectification column and comprises an air cooler 1, a gas-liquid separator 2, a fuel gas buffer tank 6, a sewage pump 4 and a pressure control system; wherein:
the air inlet of the air cooler 1 is connected with the tail gas outlet of the rectifying column; the air inlet of the gas-liquid separator 2 is connected with the air outlet of the air cooler 1; the bottom of the gas-liquid separator 2 is provided with a water outlet, the top of the gas-liquid separator 2 is provided with an air outlet, and the water outlet is connected with a water inlet of the sewage pump 4; the gas-fired boiler also comprises an exhaust pipeline and a gas pipeline, wherein one end of the exhaust pipeline is connected with the exhaust port, and the other end of the exhaust pipeline is emptied; one end of the gas pipeline is connected with the middle part of the exhaust pipeline, the other end of the gas pipeline is connected with the gas inlet of the gas buffer tank 6, and the gas outlet of the gas buffer tank 6 is connected with the burners of the first stage, the second stage and the third stage of the triethylene glycol dehydration station, so that part of combustible hydrocarbon gas is recycled; the control system comprises a controller 9, a pressure regulating valve 8, a pressure transmitter 7, a liquid level control device 3 and a solenoid valve 5, wherein the pressure regulating valve 8 is connected with the other end of the exhaust pipeline in parallel, the pressure transmitter 7 is connected with the pressure regulating valve 8 in series, and the pressure transmitter 7 and the pressure regulating valve 8 are both connected with the controller 9; the liquid level control device 3 is arranged on the gas-liquid separator 2, the electromagnetic valve 5 is arranged at a water outlet of the sewage pump 4, and the liquid level control device 3, the sewage pump 4 and the electromagnetic valve 5 are all connected with the controller 9.
As an optional implementation manner, a refrigeration fan is arranged at the air outlet of the air cooler 1, and the temperature of the air outlet of the air cooler 1 can be controlled, wherein the higher the motor frequency of the refrigeration fan is, the higher the fan rotation speed is, and the lower the outlet temperature is.
As an alternative embodiment, a rupture disk and an automatic emptying valve are arranged on the fuel gas buffer tank 6, and overpressure is prevented.
As an alternative embodiment, the tail gas treatment system is connected with a raw pipeline in the station by adopting a flange connection.
In an alternative embodiment, the air cooler 1, the gas-liquid separator 2, the gas buffer tank 6 and the sewage pump 4 are connected by pipelines.
As an alternative embodiment, the controller 9 is a PLC control cabinet.
As an alternative embodiment, the sewage pump 4 can also be controlled manually.
As an alternative embodiment, the number of the sewage pumps 4 is 2 according to actual working conditions.
Claims (3)
1. Triethylene glycol rectifying column tail gas processing system for handle the tail gas that the rectifying column was emptied, its characterized in that: comprises an air cooler (1), a gas-liquid separator (2), a fuel gas buffer tank (6), a sewage pump (4) and a control system; wherein:
the air inlet of the air cooler (1) is connected with the tail gas outlet of the rectifying column; the air inlet of the gas-liquid separator (2) is connected with the air outlet of the air cooler (1); a water outlet is formed in the bottom of the gas-liquid separator (2), an air outlet is formed in the top of the gas-liquid separator (2), and the water outlet is connected with a water inlet of the sewage pump (4); the gas pipeline is connected with the exhaust port at one end; one end of the gas pipeline is connected with the middle part of the exhaust pipeline, and the other end of the gas pipeline is connected with the gas inlet of the gas buffer tank (6); the control system comprises a controller (9), a pressure regulating valve (8), a pressure transmitter (7), a liquid level control device (3) and a solenoid valve (5), wherein the pressure regulating valve (8) is connected with the other end of the exhaust pipeline in parallel, the pressure transmitter (7) is connected with the pressure regulating valve (8) in series, and the pressure transmitter (7) and the pressure regulating valve (8) are both connected with the controller (9); the liquid level control device (3) is arranged on the gas-liquid separator (2), the electromagnetic valve (5) is arranged at a water outlet of the sewage pump (4), and the liquid level control device (3), the sewage pump (4) and the electromagnetic valve (5) are all connected with the controller (9).
2. The triethylene glycol rectification column tail gas treatment system according to claim 1, wherein: and a refrigerating fan is arranged at the air outlet of the air cooler (1).
3. The triethylene glycol rectification column tail gas treatment system according to claim 1, wherein: and the gas buffer tank (6) is provided with a rupture disk and an automatic emptying valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022435105.3U CN213790769U (en) | 2020-10-28 | 2020-10-28 | Triethylene glycol rectifying column tail gas treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022435105.3U CN213790769U (en) | 2020-10-28 | 2020-10-28 | Triethylene glycol rectifying column tail gas treatment system |
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| CN213790769U true CN213790769U (en) | 2021-07-27 |
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| CN202022435105.3U Active CN213790769U (en) | 2020-10-28 | 2020-10-28 | Triethylene glycol rectifying column tail gas treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113893639A (en) * | 2021-09-07 | 2022-01-07 | 大庆炬圣石化科技有限公司 | Tail gas recovery device for reboiler rectification column of triethylene glycol dehydration device |
-
2020
- 2020-10-28 CN CN202022435105.3U patent/CN213790769U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113893639A (en) * | 2021-09-07 | 2022-01-07 | 大庆炬圣石化科技有限公司 | Tail gas recovery device for reboiler rectification column of triethylene glycol dehydration device |
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