Feed water tank

Principle diagram of a steam cycle with feed water tank

Scheme of a feed water tank with attached degasser

Scheme of a feed water tank with a nozzle

A feedwater tank is a mostly heated container in which the feedwater for a steam boiler is stored and processed. The feed water pumps suck in the water from the container and bring it to the pressure of the steam generator.

The feed water tank must fulfill the following task:

• Storage
• Degassing of the water
• Conditioning the water
• Tempering the water

Components of the feed water tank

Degasser for two shell boilers

• Water level measurement
• Pressure transducer
• Temperature sensor
• Safety valve or rupture disc
• Vacuum breaker
• Thermal insulation
• Degasser
• Steam heating
• Heating coils for external heating
• Overflow
• Standpipes analogous to ÖNORM B 8132
• Bearing saddle
• Ladders and platforms

literature

Richard Dolezal: Combined gas and steam power plants , chap. 5.2 Feed water tank and degasser , ISBN 3540675264
Heat engineering apparatus and tanks: Illustrative 3D images, page 9, Flowserve Gestra (PDF; 2.7 MB) as of June 2, 2011
Arno Kolbitsch, comparison and analysis of biomass firing systems with regard to design and economic efficiency ( PDF; 6.1 MB); Slide 11, object 15; Retrieved June 2, 2011