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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