Typical Applications For Guillotines

Example – Coal Fired Electricity Generation Station

Precipitator Inlet and Outlet Isolation.

SOx Scrubber Inlet and Outlet Isolation

Scrubber Bypass Isolation
Stack Isolation

Hot Gas Fan Isolation

Typical Installation:

There are usually lots more dampers than shown above because a large boiler requires a number of precipitators and scrubber modules. Parallel systems are used so the main power generation system is not shut down for maintenance on a back end system. This is demonstrated in the following sketch.

Location Of Isolation Dampers In A Typical Flue Gas Clean-Up System

Legend
P – Electrostatic Precipitators F – Induced Draft Fan (Booster Thru Scrubber) S – SOx Wet Scrubber Towers ST – Chimney Of Stack	1 – Precipitator Inlet Isolation Damper 2 – Precipitator Outlet Isolation Damper 3 – ID Fan Outlet Damper 4 – Scrubber Inlet Isolation Damper 5 – Scrubber Outlet Isolation Damper 6 – Bypass Isolation Damper 7 – Stack Isolation Damper

These dampers are usually designed to have a 100% shut-off capability because when they are closed, men will be working behind them. Remember hot corrosive flue gas in small amounts "kills".

The dampers shown above could easily represent $2-5 million, depending on their physical size and materials of construction.

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About Dampers : TYPICAL APPLICATIONS FOR GUILLOTINES

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Typical Applications For Guillotines