Document 4JDbLpjxJwXe6JQnpEDOZjrqa

dependent upon particle size, *pacific gravity turbulence and location of bood opening for Best effective control. C.F.M. Area (Sq. Ft.) X 7 (F.P.K.) Referring to figure #1 - Slide No. 1 pictured is a typical hood used in the process completely enclosing the generating unit, ^he hood opening measures 1* x 3* x 1* making an overall area of 3 sq. f$. The velocity used at hood opening is 300 ft/ min. or a volume of air handled of 900 C.F.M. The single branch pipe velocity at entrance to hood is 2000 ft/ min. A blast gate and by pass damper are also provided for reducing velocities if desired. Figure (2) Illustrates the method of fiber collection and system of removing the collected fibers. The equlp&snt cooprisoa a Pungborn doth Screen Dust Collector, arranged for outside location end selective opera tion. There ere 124 screens covered with cotton filter fabric arranged vide spaced Sfc" centers providing an active area of 5130 sq. ft. These are equipped with motor driven screen vibrating mechanism utilising 4 1800 RBI motors. Tho collector is provided with a central partition through tha collector aoreen section and dust box shown below to permit continuous operation. Under normal operations, air flows to both sides of the collector. Provisions have been made permitting the entire air flowto.be diverted to the collector In order to vibrate soreens In the other half and clean out the dust box section below the Isolated seraen section. The air flow Bates are then reversed to permit screen vibration and cleaning of the opposite >mif of the eollootor. The air flow gates ore finally opened so os to return both soreens sections to the line* This operating cycle is performed once each day as a result of our experience. The removal of -* i fi EXCASB 0029