pa1778data.pdf
pa1778data.pdf
pa1778data.pdf
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VII. Water Treatment Facilities:<br />
U.S. STEEL DUQUESNE WORKS<br />
HAER NO. PA-115<br />
(Page 199)<br />
A. Scupper: The scupper is connected to the underside of the<br />
rough gas main just before the main enters the tee on the roof of<br />
the gas quencher pump house. It separates out the dirty gas<br />
quencher water from the rough gas main and directs it to a 12"<br />
diameter pipe which carries it downward at a rate of 1050 gpm to<br />
one of two rake classifiers.<br />
Installation date: 1966.<br />
B. Rake Classifiers: Two Dorr-Oliver rake classifiers with a<br />
capacity of 40 tons a day are laid out on a east-west axis<br />
between the western wall of the gas quencher pump house and the<br />
eastern wall of the filter cake house. The hydraulically-powered<br />
shallow drag-out classifiers sweep settled solids up an inclined<br />
rake to a dewatering hopper.<br />
Installation date: 1966.<br />
C. Cooling Tower Slurry Pumps: Located in the western bay of<br />
the gas washer pump house are two 7 1/2 hp motor-powered Allis-<br />
Chalmers slurry pumps rated at 500 gpm. A 10 hp motor-powered<br />
Allis-Chalmers slurry pump rated at 600 gpm is located in the<br />
eastern bay of the gas washer pump house.<br />
Installation of pumps in western bay: 1963.<br />
Installation of pump in eastern bay: 1976.<br />
D. Clarifier and Sludge Pumps: Located just north of the fans<br />
and stacks for the gas cooling towers is one 85*-o fl diameter x<br />
9 f -6" high clarifier complete with a 3 hp motor-powered sludge<br />
rake and a 15'-0 ,f diameter centerwell. A 2 l -6" wide x 3'-0" deep<br />
launderer encircles the circumference of the clarifier.<br />
Two 10 hp motor-powered Gallagher sludge pumps rated at 90<br />
gpm are located in a tunnel beneath the clarifier. The pumps<br />
deliver sludge to the filter cake house.<br />
Installation date: 1963.<br />
E. Filter Cake House and Sludge Dewatering Equipment: Laid<br />
out on a north-south axis, the one story, 36'-0" wide x 40 f -0"<br />
long filter cake house is located approximately 30'-0" west of<br />
the gas quencher pump house. Built on a concrete foundation by<br />
the American Bridge Company, the steel framed building sits on<br />
top of a 21'-6" high raised steel framed platform. It has a<br />
corrugated metal exterior and its gable roof is supported by<br />
structural channels.<br />
Two 7 5 hp motor-powered Nash-Hytor vacuum pumps with vacuum<br />
silencers are located near the south wall of the building. Each