Environmental Engineering Reference
In-Depth Information
Incorporated with Ozone Oxidization and Alkali Solution Adsorption
Ta b l e 5. 3
Energy consumption calculation of O
3
generated in a 300 MWe unit
Unit capability (MWe)
300
Mole ratio of O
3
/NO
1
Flue gas volume ((N·m
3
)/h)
Content of Hg (mg/(N·m
3
))
1.20E+06
0.03
Initial concentration of NO
x
(mg/(N·m
3
))
600
Content of SO
2
(ppm)
100
Emission concentration of NO
x
(mg/(N·m
3
))
400
Required content of O
3
(kg/h)
257
Produce O
3
by air
Produce O
3
by oxygen
Ozone concentration (g/(N·m
3
))
20
130
Gas volume ((N·m
3
)/h)
12857
1978
Energy consumption per kg O
3
(kW/kg O
3
)
26.5
6
Energy consumption 1 (kW)
6814
1543
Energy consumption of each m
3
O
2
(kW/m
3
O
2
)
ˉ
0.38
Energy consumption 2 (kW)
ˉ
752
Total energy consumption (kW)
6814
2294
Unit fume energy consumption
(W/(N·m
3
))
5.68
1.91
Ratio of power generation (%)
2.27
0.76
Ta b l e 5. 4
Investment comparison of the power consumption of the separate techniques by
using O
3
and the method combined with furnace techniques
Initial concentration of NO (mg/(N·m
3
))
600
O
3
only
O
3
+OFA
O
3
+reburning
Removal efficiency in the furnace (%)
0
30
50
Concentration of NO during O
3
treatment
process (mg/(N·m
3
))
600
420
300
Final emission concentration
(mg/(N·m
3
))
200
200
200
The overall removal efficiency of NO
x
(%)
66.67
66.67
66.67
Investment (ten thousand yuan)
3857
2121
964
Unit investment (yuan/kW)
129
71
32
Required amount of O
3
(kg/h)
514
283
128
Total energy consumption (kW)
4589
2524
1147
Ratio of power generation (%)
1.53
0.84
0.38
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