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Full text of "The Flow Of Gases In Furnaces"

344

APPENDIX IX

Another fact that is shown in Fig. 173 is that the temperatures
at points A and C are those between which the dissociation cf
2 CO to C and C02 will occur as shown in the curve in Fig. 180.


	
	
	
	
	
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	Tcmpetatuie of Steam at 35C F, and 131 Pounds
														
	
	
	
	
	
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		1                     1              "    ..... 1 "     1          I
														
	
	
	
	
0-4         8        12       16        20       24       M       32       30     40
Length of Pitk at Gaees from ToBiUoa oIThetmooouple 4. Feefc
FIG. 178.
Curve showing the temperature of gases flowing through double pass horizontally
baffled boiler in Fig. 177. Positions of thermo couples indicated by letters. Solid line
curves show temperatures indicated by pyrometer couples. Dotted line curve shows
computed approximate true gas temperatures. Dash curve shows computed gas velocities,
probably based on gases occupying full area, of pass. Upper and lower diagrams show
similar data for two different initial temperatures.
A considerable portion of the soot formed in this pass will drop
into the pocket in the setting below the pass, other portions will
pass on and out of the stack.