Which device is used to remove oil from the exhaust steam line from a turbine?

Which device is used to remove oil from the exhaust steam line from a turbine?

• A. Oil separator
• B. Filter
• C. Strainer
• D. Demister

Answer: (A)

Oil from the lubrication system can become entrained in turbine exhaust steam, so it must be removed before the steam goes to the condenser. An oil separator is designed for this purpose: it uses coalescing or separation techniques to pull oil droplets out of the steam, returning the oil to the lubrication system while clean steam continues on. Filters and strainers target solid particles, not oil; a demister removes moisture droplets from gas but isn’t effective at removing oil from steam. So the device that best serves this need is the oil separator.

Oil from the lubrication system can become entrained in turbine exhaust steam, so it must be removed before the steam goes to the condenser. An oil separator is designed for this purpose: it uses coalescing or separation techniques to pull oil droplets out of the steam, returning the oil to the lubrication system while clean steam continues on. Filters and strainers target solid particles, not oil; a demister removes moisture droplets from gas but isn’t effective at removing oil from steam. So the device that best serves this need is the oil separator.