This duct balloon installation was located about 90’ above the ground that was accessible via the stairway as shown. It is used annually during inspection and maintenance of the FGD absorber.
Duct Balloons
Reduce Maintenance Cost
It is a one piece design that measure 36’6 wide x 14’10” high x 3’0” deep and weighs about 160 lbs. It is installed inside the FGD system duct work about 25’ from the existing isolation damper. The existing damper continues to provide the primary isolation and the duct balloon provides secondary isolation. The space between the two is ventilated on two sides of the duct via the use of access doors to meet the requirements of a double block and bleed arrangement.
While is only takes one high pressure blower to keep this size duct balloon fully inflated, the customer opted to use a two blower arrangement with a “Y” inflation tube to meet their company’s safety requirements. This installation is similar to what we have been supplying on SCR applications.
Copyright 2010 by G.R. Werth & Associates, Inc. - All rights reserved