Environmental Engineering Reference
In-Depth Information
Air ratio
1.5
1.3
1.2
1.1
1.05
Heat recovery rate
3000
1200
40
60
80
%
1100
2000
1000
1000
900
0
10
20
30
40
50
60
1.0
1.2
1.4
1.6
1.8
2.0
Furnace length, m
Air ratio
Air ratios and furnace lengths
Heat recovery rates
Discharging
temperature
1150 ° C
1200
1250
ton/h
150
200
250
300
1200
1200
1100
1100
1000
1000
900
900
1.0
1.2
1.4
1.6
1.8
2.0
1.0
1.2
1.4
1.6
1.8
2.0
Air ratio
Air ratio
Discharging temperatures
Processing capacity ton/h
Charging temperature
20 ° C
100
200
300
400
500
600
1200
Slab
thickness
200mm
250
300
1200
1000
1100
800
1000
600
900
400
1.0
1.2
1.4
1.6
1.8
2.0
1.0
1.2
1.4
1.6
1.8
2.0
Air ratio
Air ratio
Charging temperatures
Different slab thickness
FIGURE 5.50 Various effects on fuel consumption rate of furnaces.
pressure in the furnace will not be markedly changed and the pilot burner will be
able to continue stable combustion. The basic concept behind these requirements is
to realize timing-optimized aperture control of the flow regulating valves at the
moment of burner changeover . Figure 5.51 shows the concept of the operating
sequences.
 
 
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