Combustion Phenomena of High Temperature Air Combustion - High Temperature Air Combustion: From Energy Conservation to Pollution Reduction - page 138

H extsegments = 410 kw ± 85 kw

NATURAL GAS (HTAC97)
Flue gas: 877 Kg/h
H flue = 380 kw T flue = 1220 ° C

H losses = 140kw ± 85 kw

Lambda = L1
Gas = 47 kg/h H gas = 580 kw
Comburent = 830 kg/h H = 350 kw Tin = 1300 ° C

vol% dry vol% wet vol% dry vol% wet

CO2
O2
N2
H2O
NOx

20.5
2.2
77.3
0.0
140 ppmvd

14.4
1.6
54.4
29.6

CO2
O2
N2
H2O
NOx

7.6
23.0
69.5

6.4
19.5
59.1
15.0

H in = H air +H gas = 930 kw
= 35%-53%

110 ppmvd

H extsegments = 400 kw ± 30 kw

HEAVY FUEL OIL (HTAC98)
Flue gas: 816 Kg/h
H flue = 350 kw T flue = 1240 ° C

H losses = 160 kw ± 80 kw

Lambda = 1.15
HFO = 51 kg/h H hfo = 580 kw
Comburent = 765 kg/h H = 330 kw Tin = 1320 ° C

vol% dry vol% wet vol% dry vol% wet

CO2
O2
N2
H2O
NOx

24.4
1.4
74.1
0.0
215 ppmvd

18.9
1.1
57.7
22.3

CO2
O2
N2
H2O
NOx

7.2
23.4
69.5
0.0
70 ppmvd

6.2
20.1
59.7
14.0

H in = H air +H gas = 910 kw
= 35%-53%

H extsegments = 415 kw ± 40 kw

COAL (HTAC99)
Flue gas: 871 Kg/h
H flue = 360 kw T flue = 1230 ° C

H losses = 105 kw ± 40 kw

Lambda = 1.2
Coal = 66 kg/h H coal = 580 kw
Comburent = 675 kg/h H = 300 kw Tin = 1350 ° C
Transport air = 130 kg/h T = 40 ° C

vol% dry vol% wet vol% dry vol% wet

CO2
O2
N2
H2O
NOx

25.5
3.1
71.3
0.0
320 ppm

20.8
2.6
58.3
18.2

CO2
O2
N2
H2O
NOx

9.5
23.1
67.4
0.0
100 ppmvd

8.1
19.7
57.2
15.1

H in = H air +H coal = 880 kw
= 43%-53%

Bumout 99.40%

FIGURE 2.103 Heat and mass balance of the furnace.

2.5.3.4.2 Gas Composition
The gas composition profiles show smooth gradients as was already found in the
previous HTAC trials for natural gas and oil. Almost the whole furnace volume is
filled with combustion products with the flue gas composition. Combustion seems