pa1778data.pdf

U.S. STEEL DUQUESNE WORKS
HAER No. PA-115
(Page 200)
pump is connected by means of a 12" diameter pipe to a drum
filter assembly. Laid out on a north-south axis, each Dorr-
Oliver vacuum drum filter assembly consists of a 10'-0" diameter
x lS'-O" long cloth covered drum set inside a basin. The eastern
side of each basin consists of a slurry tub, the western side
consists of a chute leading directly to a dumping area below.
Located just south of each drum filter, near the eastern and
western walls of the building is a 2 , -0" diameter x 10'-0" high
filtrate receiver. Also associated with each vacuum drum
assembly is a set of compressed air piping.
Construction date: 19 63.
Installation of all equipment: 1963.
F. Acid Storage Tank: A 10,000 gallon capacity sulfuric acid
storage tank is located along the northwest side of the
clarifier. The 20'-0" diameter x 19*-0" long tank sits in a
limestone filled pit.
Installation date: 1979.
G. Neutralization Tank: A 6,175 gallon capacity
neutralization tank is located along the western side of the
clarifier. Overflow water from the clarifier's launderer is
treated with sulfuric acid in the 9'-l M diameter x 13'-0" high
tank before 900 gpm of the water is recycled by gravity to the
gas quench pumps while the remainder (750 to 1800 gpm) is fed to
the wet well.
Installation date: 1979.
H. Wet Well: Located just west of the neutralization tank and
laid out on a north-south axis is a 10'0" wide x 17■-0" long x
15'-0" deep, 18,000 gallon capacity concrete wet well. The well
partially extends into the southwest corner of the chemical feed
pump house. Water entering the wet well is treated with a
calcium dispersant before it is pumped over to the filtration
system.
Construction date: 1979.
I- Chemical Feed Pump House: Laid out on a north-south axis,
the 14 f -0" wide x 22'-8" long x 10 f -8" high pump house is located
just north of the neutralization tank. Built on a concrete
foundation, the building is constructed of concrete block.
Three vertical cantilevered, variable speed Morris pumps
(450 or 900 gpm) powered by 30 hp motors, are laid out linearly
in the southwestern corner. They pump water from the wet well to
the filtration system. Four 1/2 hp Milroyal A metering pumps are
laid out linearly along the northern wall. The two western pumps
deliver sulfuric acid at a rate of 1.1 gpm to the neutralization
tank. The eastern pumps deliver calcium dispersant to the wet