Boiler feedwater pump

A feed water pump (often briefly referred to only feed pump ) is a pump for the supply of a steam boiler or steam generator with feedwater which is required to generate the steam.

In steam power plants, it is designed as a centrifugal pump. In large power plants, the feed pump is preceded by a backing pump, which provides the necessary form. The feed pump is usually driven by its own smaller steam turbine, called the so-called feed pump drive turbine or short " Spat ". The At - up and shutdown take electric feed pumps "ESP". The power range of these pumps can be up to 42 MW in large power plants, and thus represents the largest single item of the own needs of a steam power plant

For security, each boiler at least two spaced -working food facilities must have independent ( for large systems a turbo feed pump and two electric feed pumps ).

Likewise ( locomotives, cranes, smaller boilers ) piston pumps come with smaller steam plants are used. These consist of two mechanically coupled to one another flask. The drive piston is driven by the vapor pressure and moves the pump piston, which promotes the feed water. The drive piston has a larger cross-section than pump piston. Thereby, the pump creating a pressure higher than it is supplied as a driving pressure.

Feed water pump ( main pump ) power plant Niederaußem block K a final pressure of 360 bar and a crowd of 3750 m³ / h, driven by a SPAT

Feedwater pump power plant Altbach / Deizisau HKW 2 structure ( vL ): pre-pump, engine, transmission control clutch main pump

Redundant feedwater pumps the biomass cogeneration plant Steyr designed for 140 bar differential pressure at 40 m³ / h and with an extraction at 20 bar for 10 m³ / h

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