The flow rate of the isolation gas for the dry gas seal of the turbine compressor is normal; what’s the reason for oil being present in the cylinder drainage lines?
Thread Content
The flow rate of the isolation gas for the dry gas seal of the turbine compressor is normal; what’s the reason for oil being present in the cylinder drainage lines?
There must be a leak of lubricant or oil in the air!
I don’t know; the pressure and flow rates of the dry gas seal are normal, so I’m not sure at the moment
The bearing lubricant is leaking in. If the amount is small, no action is needed; if it’s significant, the lubricant pressure can be reduced slightly, or the pressure of the isolating gas can be increased a bit.
The flow rate of the isolation gas for the dry gas seal of the turbine compressor is normal, but oil is present in the drain lines of the cylinder body. What’s the cause? Answer: The presence of oil in the drain lines indicates that lubricating oil has managed to penetrate the comb seal. It is recommended to check whether the oil recovery from the compressor is functioning properly, to verify whether the oil level in the sight glass is the same as before, and to check whether the comb seal is worn out. All these reasons can cause Runhuan oil to enter the backwash chamber. If you have any other questions, please send an email to hyhuning@163.com
When it comes to sealing gas, what needs to be clarified first is not pressure but pressure difference. The so-called seal gas differential pressure refers to the difference between the supply pressure of the seal gas (downstream of the pressure regulator) and a certain reference pressure (which varies depending on the manufacturer). Regarding the issue mentioned by the poster, is the differential pressure between the seal gas supply pressure and the lubricating oil tank (the equipment used for storing and circulating lubricating oil) within normal limits? Is there assurance during the start-up and shutdown of the turbine, especially during shutdown? In some devices, the pressure in the oil tank can rise abnormally during shutdown, resulting in poor oil return. Typically, the turbine equipment is shut down, but its auxiliary systems, especially the lubrication system, may remain operational to protect the equipment (for example, by maintaining bearing temperatures). If the differential pressure of the sealing gas cannot be maintained for various reasons, this can lead to lubricant leakage