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Chicago pumping engines
July, 18’17.1
Chicago Pumping CHICAGO
33
Enginea.
PUMPING
ENGINES.
The test of the pumping engines lately constructed for the West Side Pumping Station of the city of Chicago, Ill., by the Quintard Iron Works of New York, was commenced in the month of January last, but in consequence of the condition of the boilers, from the presence of scale and mud, extreme cold weather and injudicious firing, the engines failed in the required duty of 90,OOO;OOO ft. Ibs., although they discharged more than the required volume of water, of 30,000,OOO U. S. gallons in 24 hours. The Commissioners upon this occasion were : Moses Lane, of Chicago; Chas. H. Haswell, of New York ; Henry Warrington, of Chicago; Chas. Hermany, of Louisville ; and T. J. Whitman, of St. Louis. The boilers having been cleaned, and more reliable means effected of measuring both the flow of the water delivered and the height to which it waa raised, than upon the previous occasion, the test was renewed on the 18th of April, under the direction of Messrs. Lane, Haswell and Warrington, and continued for 48 hours with each engine, with the following results : ENGINES. No. 25.
Period of operation, . Pressure of steam at boiler, . . . Pressure of steam at engine, . 1 Point of cutting off, Revolutions, . . . Temp. of feed water, “ external air . “ engine room, “ fire room, Coal consumed (Lackal wanna broken lump), Av. height of water in standing pipe, . Av. height of water as indicated by pressuregauge at delivery, . Peed water per hour, , . Width of weir, . Av. height of weir, . Volume of leak in weirbox or flume, . WHOLENo. VOT,. CIV.-(THIRD
No. 26.
48 hours.
48 hours.
61~77 lbs.
6036
59.25 Ibs. 30 to 33 in. 11.177 per min. 12‘4O 4/. 45O 9’. 75”. 77”.
60.25 lbs. 30 to 33 in. 10.63 per min. 131”. 60” 48’. 770 94’. 73”.
42,400
43,028
Ibs.
155.83 ft.
159.11
ft.
157.06 ft. 9779.5 lbs. 7.94 ft. *9787 ft.
159.34 ft. 10059.4 1bs. 7.94 ft. -9543 ft.
5768 cu. ft.
5768 cu. ft.
lbs.
SERIES, Vol. lxxiv.)
Ibs.
Pire-proof
34
[Jour. Frank. Inst.,
Paper.
The volume of water discharged, computed by Francis’s and the duty developed for each engine, were as follows :
formula,
VOLUME.
3.83 x a9787 3 (7.94*2 x a97871 x 172800=4314617*28 &= 5768. . . . . Leakage of weir-box and gate,
cu. ft. “ “
4320385.28 In 48 hours = 16159363
gallons
cu. ft.
in 24 hours. DUTY,
Hence,
raised
432038.528 ____-
x 62.4 X 165.83 42400
1 ft. in height,
The engines
_
99066718.27
lbs.
of water
100 with 100 lbs. of coal.
are vertical
compound,
PRINCIPAL
with over-head
beam.
DIMENSIONS.
High-pressure cylinder, diameter 48 in. Stroke of piston, 6 ft. Low-pressure cylinder, diameter 76 in. Stroke of piston, 10 ft. Pump, 51 in. Stroke of piston, 10 ft. Fly-wheels, each 32 ft. in diameter and 60 tons in weight. Beam, 36 ft. in length and 7 ft. in depth. Boilers, 4 cylindrical, fire tubular return. Diameter of shell, 6 ft. 6 in. Length, 16 ft. Tubes, 100 of 4 in. in diameter and 16 ft. in length. Drum, 3 ft. 6 in. diameter and 8 ft. in height. Grate surface, 116 sq. ft. Sverage corisnmption of coal per hour, 890 Ibs. Avera.ge evaporation per pound of coal, 11.12 lbs.
is found in la,rge quantities in the Fire-proof Paper. -Asbestos A priest of Arezzo, named valley of Aosta, in the Italian Alps. Victoria de1 Corana, has experimented with it in the paper mills of Tivoli, and is now making a fire-proof fabric at a cost of four francs The most useful application which has yet been per kilogramme. made of the paper, is for the decorations of theatres--Papier-ZeitC. zcng, April 19.
Chicago Pumping CHICAGO
33
Enginea.
PUMPING
ENGINES.
The test of the pumping engines lately constructed for the West Side Pumping Station of the city of Chicago, Ill., by the Quintard Iron Works of New York, was commenced in the month of January last, but in consequence of the condition of the boilers, from the presence of scale and mud, extreme cold weather and injudicious firing, the engines failed in the required duty of 90,OOO;OOO ft. Ibs., although they discharged more than the required volume of water, of 30,000,OOO U. S. gallons in 24 hours. The Commissioners upon this occasion were : Moses Lane, of Chicago; Chas. H. Haswell, of New York ; Henry Warrington, of Chicago; Chas. Hermany, of Louisville ; and T. J. Whitman, of St. Louis. The boilers having been cleaned, and more reliable means effected of measuring both the flow of the water delivered and the height to which it waa raised, than upon the previous occasion, the test was renewed on the 18th of April, under the direction of Messrs. Lane, Haswell and Warrington, and continued for 48 hours with each engine, with the following results : ENGINES. No. 25.
Period of operation, . Pressure of steam at boiler, . . . Pressure of steam at engine, . 1 Point of cutting off, Revolutions, . . . Temp. of feed water, “ external air . “ engine room, “ fire room, Coal consumed (Lackal wanna broken lump), Av. height of water in standing pipe, . Av. height of water as indicated by pressuregauge at delivery, . Peed water per hour, , . Width of weir, . Av. height of weir, . Volume of leak in weirbox or flume, . WHOLENo. VOT,. CIV.-(THIRD
No. 26.
48 hours.
48 hours.
61~77 lbs.
6036
59.25 Ibs. 30 to 33 in. 11.177 per min. 12‘4O 4/. 45O 9’. 75”. 77”.
60.25 lbs. 30 to 33 in. 10.63 per min. 131”. 60” 48’. 770 94’. 73”.
42,400
43,028
Ibs.
155.83 ft.
159.11
ft.
157.06 ft. 9779.5 lbs. 7.94 ft. *9787 ft.
159.34 ft. 10059.4 1bs. 7.94 ft. -9543 ft.
5768 cu. ft.
5768 cu. ft.
lbs.
SERIES, Vol. lxxiv.)
Ibs.
Pire-proof
34
[Jour. Frank. Inst.,
Paper.
The volume of water discharged, computed by Francis’s and the duty developed for each engine, were as follows :
formula,
VOLUME.
3.83 x a9787 3 (7.94*2 x a97871 x 172800=4314617*28 &= 5768. . . . . Leakage of weir-box and gate,
cu. ft. “ “
4320385.28 In 48 hours = 16159363
gallons
cu. ft.
in 24 hours. DUTY,
Hence,
raised
432038.528 ____-
x 62.4 X 165.83 42400
1 ft. in height,
The engines
_
99066718.27
lbs.
of water
100 with 100 lbs. of coal.
are vertical
compound,
PRINCIPAL
with over-head
beam.
DIMENSIONS.
High-pressure cylinder, diameter 48 in. Stroke of piston, 6 ft. Low-pressure cylinder, diameter 76 in. Stroke of piston, 10 ft. Pump, 51 in. Stroke of piston, 10 ft. Fly-wheels, each 32 ft. in diameter and 60 tons in weight. Beam, 36 ft. in length and 7 ft. in depth. Boilers, 4 cylindrical, fire tubular return. Diameter of shell, 6 ft. 6 in. Length, 16 ft. Tubes, 100 of 4 in. in diameter and 16 ft. in length. Drum, 3 ft. 6 in. diameter and 8 ft. in height. Grate surface, 116 sq. ft. Sverage corisnmption of coal per hour, 890 Ibs. Avera.ge evaporation per pound of coal, 11.12 lbs.
is found in la,rge quantities in the Fire-proof Paper. -Asbestos A priest of Arezzo, named valley of Aosta, in the Italian Alps. Victoria de1 Corana, has experimented with it in the paper mills of Tivoli, and is now making a fire-proof fabric at a cost of four francs The most useful application which has yet been per kilogramme. made of the paper, is for the decorations of theatres--Papier-ZeitC. zcng, April 19.