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Full text of "The Flow Of Gases In Furnaces"

DESIGN" OF  OPEN-HEARTH  FURNACES
OTHKK WASTE UKAT BOILKII DATA

239

Test Number .                    ........ ....
	1*
	»>
	3
	4


	
	
	
	

Plant
	111. St. (.Jo.
	Indiana St. Co.
	Bethlehem Co.
	Lacka-wanna Steel Co.

Rated furnace capacity, tons. ........ Aotujil furnace capacity tons. ..,,...
	<>r>
 72 1
	75
 85
	80 82 (i
	oo.oot
 00 <)()

Type, of boiler .....                  ......
	Stirling
	Hunt
	B & W
	B <fe W

Boiler hunting surface, Kq m. ........ Steam pressure ab.Holute, kg per sq em.
 Superheat, de^  (!, .              .     .......
	371.0 9 . 70
 71  00
	453.3 9. SO 9S 00
	480.0 07 00
	502.3 54 00

HUH at boiler inlet        ...... .
	004 00
	024 00
	730 00
	530 00

( »iis at boil(»r outlet          .........
	327 00
	277 00
	250 00
	242 00

Drop in temperature. . . . . ..... .... Draft at boiler inlet, nun    .   ...   ...
	337.00
	347.00 37 00
	483.00 30 00
	288.00 45 00

Outlet ......... ... ............
	.
	100.00
	83.00
	92.5

Draft- IOHH in boiler
	•15 2
	03 00
	44 00
	47 5

Weight of KIIH passing; through boiler, kg per second
	<) 22
	10 00
	0 50
	10 00


	
	
	
	

NOH. 1, 2 and 3 from (•. J. Bacon'H paper at 1915 meeting of the
American Iron and Steel Institute*.
Tiwt No. 4, Arthur I). Prati, American Society of Mechanical Kn$ineerB,
December, 1910.
The following method of arriving at the amount of boiler-
heating surface required for absorbing the waste heat from an
open-hearth furnace1 is simply an extension of the method used by
the author in arriving at the regenerator capacity required and
reference taunt be made to the heat-capacity curves given in the
preceding .section of this work.
In practice it might l>e desirable to divide* this heating surface
between an economizer or feed-water heating section and a boiler
or steam-producing section. Thin method of construction will
result in a reduction of the size of the; boiler and its cost, and
possibly may reduce the total cost of the installation. When
the cost of the* foundations arid other structure required
to install the*, economizer in considered it is probable that the