Piping compressor dry gas seal
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The natural gas pipeline compressor is located in a remote area, and there is no high-pressure nitrogen available on site. The dry gas seal system uses two booster pumps, with one pump in use and the other as a backup. The booster pump of the backup unit has to be operated frequently, which results in the need for regular replacement of its internal components. Do any of the technical experts have good solutions for dealing with such issues? Also, what causes oil mist to emerge from the isolation gas vent? Thank you!
Is there oil mist at the isolation gas vent? The isolation gas is primarily used to prevent lubricant from entering the dry gas seal
Is your “dry gas” equipment a screw compressor? Oil and gas are mixed; the gas is compressed, while the oil serves as a lubricant within the screw compressor, and then it passes through an oil-gas separation filter? Is the compressed gas dried by a dryer before entering the sealing point? Guess: Lol, with devices of this kind, it’s necessary to replace the separation filters and lubricating oil frequently. The key is the atmospheric environment; impurities in the air are the main cause of changes in oil quality. It is recommended to replace the air filter.
Piping compressors should be centrifugal, right? !
1. Keep an extra supply of spare parts, usually such as O-rings and directional valves inside the dry gas seal booster pump. 2. Keep the standby unit under pressure; see if it’s possible to reduce the pressure on this unit. While ensuring an adequate pressure difference between the inside and outside, determine whether it’s feasible to shut down the booster pump. 3. Oil is coming out from the isolation gas – check whether the conditions are suitable, analyze the oil sample to determine whether it belongs to the lubricating oil of the compressor unit or that of the air compressor used for the isolation gas (compressed air). If it’s the compressor’s lubricating oil, see if that can increase the negative pressure in the oil tank. If it’s an air compressor, consider adding additional oil removal measures. It’s just a suggestion; I’m not sure if it will work
Thank you for your reply; maybe I didn’t explain it clearly enough! The pipeline compressor is of centrifugal type and uses a dry gas seal; the exhaust port for the isolation gas of this dry gas seal contains oil mist
Received. Thank you for your reply; it feels very practical and useful. Thanks!
That gas with oil mist should be called \"air-fuel mixture\" – a gas composed of natural gas and sealing gas. If oil mist is present, it must be leaking from the seal of the bearing box. I’m not sure what this type of pressurized fan looks like, nor whether the fuel tank requires a negative pressure environment.
It’s a regular high-pressure centrifugal compressor; the oil tank requires negative pressure