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Plant Operation & Maintenance

Industrial & Power Plant Services

8.  Vacuum Condensers

As a result of continuous design and technological developments, FBM designs and manufactures the condensing package from the turbine exhaust outlet flange up to the battery limit condensate feedback system, including non-condensable extraction unit, prevents the undesirable phenomenon of steam back-flow that can occur in the outlet headers of conventional condensers and the consequent trapping of non-condensable, which causes reduction of heat exchange, freezing during wintertime and corrosion inside the tube.

The Special features of FBM designs are:

1. Separate Outlet Headers – has independent outlet headers (one header for each row of tubes), thus preventing the steam back-flow and the consequent problems.


2. Condensate Drain System – Condensate from each outlet header flows through independent drain lines to a common manifold, then to a hydraulic guard that keeps different pressures in the different rows to prevent mixing of gas and steam at different pressures in the different outlet headers.


3. Non-condensate Evacuation System – coming from each header, flow into separate vent lines, one for each row of tubes, and then to first stage ejectors.


4. Control – of condenser performance is performed by adjusting air flow with manual or automatic louvers, auto-variable pitch fans, two speed or variable speed motors, sequential fan shut down, or combinations of these methods.