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Full text of "The Flow Of Gases In Furnaces"

276

APPENDIX VII


	Gas
	Air
	Gas on
	Air on


	on
	on
	Waste
	Waste


	Gas
	Air
	Gas
	Gas

-y=frictional resistance in kg per
	
	
	
	

0.016X2.174X6.60X0.208 =
	0 kg 048
	
	
	

0 016X1 947X6 39X0 239 =
	
	0 kg 048
	
	

0.016X2.174X8 19X0 192 =
	
	
	0 kg 055
	

0 016X1 947X7 23X0 192 =
	
	
	
	0 kg 043

7 may be considered as kg per
	
	
	
	

m2 or as mm of water
	
	
	
	

The pressure required to create the
	
	
	
	

air and gas velocity above the
	
	
	
	

checkerwork =
	
	
	
	

5 = (vf ~s-20) Aj kg per m2 .......
	0 kg 462
	0 kg 498
	0 kg 657
	0 kg 512

The height from the bottom of the checker chambers to the
port sill or bridge of the furnace can now be fixed from dimensions
that have been determined. This permits the approximation of
the chimney effect of the checkers and uptakes. The height will
be found as follows:

Flues below checker chamber .............
	1 m 000
	3 280 ft

Checkerwork height ...............................
	7m 000
	22.963ft

Checker to arch at center
	1 600
	5 249


	
	

J^rom bottom of arch to port sill
	9 m600 3m 000
	31.492ft 9 844


	
	

H  total height to port sill ........................
	12 m 600
	41.336ft

Chimney Effect of Checkers and "Uptakes
	Gas on Gas
	Air on Air
	Gas on Waste Gas
	Air on Waste Gas

5 ^^(Aair  Agas t) ...........
	
	
	
	

  = average temperature
	850
	750
	1200
	1100

1 -^.(xt = gas factor .....
	4 1195
	3 7525
	5 4040
	5 0370

Ao = specific weight of gases .... Afgass=Ao-s"(l"r'**0 kg perm3 .....
	1.125 0.273
	1.293 0 345
	1.32
 0 244
	1.32 0 262

A&IT = specific weight of air .......
	1.293
	
	
	

Aair  Ajgag = kg per m3
	1 020
	0 848
	1 049
	1 031

$1 = 12.60X1.02  =kgperm2..
	12 kg 851
	
	
	

52 = 12 60X 0.848= kg per m2
	
	10 kg 683
	
	

53 = 12. 60X1. 049=kg per rn2. .
	
	
	13 kg 217
	

54 = 12. 60X1. 031 =kg perm2. .
	
	
	
	12 kg 990