What is the purpose of the condensate extraction pump?
A condensate pump is a centrifugal pump which is named after the type of fluid handled. It is used in condensers to pump out the condensed steam as water (condensate) in a technical vacuum (near vapour pressure).
Why condensate extraction pump is vertical?
The CEP are vertical canned type to ensure Net Positive Suction Head Available (NPSHA). In small plants, they can also be horizontal end suction type. In medium to large size coal- and oil-fired power plants, the CEP are vertical canned type to ensure enough Net Positive Suction Head Available (NPSHA).
How is water level maintained in condenser?
Steam enters the condenser where it cools and condenses into water before being sent to the low-pressure feed-water heater. The condenser hotwell serves as a water reservoir for the turbine cycle. When hotwell level reaches the low point, a valve opens to supply make-up water to the cycle.
What is a extraction pump?
The extraction pump is used to draw water from a condenser which is under vacuum. The pump also provides the pressure to deliver the feed water to the de-aerator or feed pump inlet. These pumps require a specified minimum suction head to operate and, usually, some condensate level control system in the condenser.
What is BFP power plant?
In a thermal power plant, the boiler feed pump (BFP) is one of the critical auxiliary machines that are equivalent to the heart of the plant.
What is GSC power plant?
GSC (Gland steam condenser) is simply an efficiency improver in thermal power plants. The working of GSC is quite simple as like condenser. It has shell inside which some tubes are mounted. …
How the vacuum is created in the condenser?
Water is used to condense steam back to liquid water in any form of boiler system, whether on board ship or in power plants. In other words, the specific volume of water at a given pressure is many times lower than that of steam. This enormous reduction in volume creates the vacuum inside the condenser.
How does a vacuum condensate system work?
With the vacuum pump installed on the feed unit, the condensate returns under vacuum directly to the feed tank. It is stored under vacuum until required by the boiler water level control. Finally, note that eliminating your system’s vacuum return pumps will likely increase operating and fuel costs.
What that is fed back to the boiler by the pump is called?
Water that is fed back to the boiler is called boilerfeedwater.
What is the purpose of balancing line in boiler feed pump?
Balance line is used to balance the centrifugal pump shaft from axial thrust. Due to the axial thrust, pump bearings and internals will get damaged. To nullify this effect, a tapping from discharge end (between balancing & counter balancing disc) is connected to a balancing drum.
How is a vacuum pump vacuum created?
Vacuum pumps essentially move gas molecules from one region to the next to create a vacuum by changing high and low-pressure states. As molecules are removed from the vacuum space, it becomes exponentially harder to remove additional ones, thus increasing the vacuum power required.
