The deaerator will be provided to heat the boiler feed water and also to remove air for deaeration of condensable gases mainly oxygen from boiler feed water. The deaerator will be pressurized direct contact spray and tray type. The operating pressure of the deaerator will be controlled in order to limit the oxygen content in the boiler feed water. The deaerator will be provided with a storage tank for storing the feed water for 30 minutes of boiler operation on 100% MCR load. The steam required for heating the feed water will be drawn from the bleeding of turbine. The loss of boiler feed water will be compensated from the make from the DM plant.

Deaerator Specification
Type Spray and Tray type, parallel/counter flow system.
Service Feed water heating & air removal

Normal Operating Pressure kg/cm2(a)

 1.5
Feed Water Outlet Temp. (0C) 105
Heating Steam Flow (TPH) 3.6
Temperature of extraction steam

245 for heating condensate (0C)
Heating Steam Pressure kg/ cm2(g) 3.50
Condensate flow to deaerator 25.71
Condensate flow inlet to deaerator

6.26from process and make up water (TPH)
Make up water temp. (0C)

40.0
Storage capacity from normal water

30.0 level to low water level (minutes)
Oxygen content at outlet (ppm) 0.007 ppm
 
 
 
Steam Generator
Turbo Generator
Deaerator
Compressed Air System
Control Room
Cooling Tower
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