(1)NOx after O2 correction CO after O2 correction
(a)Calculating equation
C= | 21 - On |
• Cs |
21- OS
C:Concentration after O2 conversion Cs: NOX or CO concentration measured Os: O2 concentration measured
On: O2 concentration as conversion basic: 4% Oil combustion boiler
5% Gas combustion boiler
6% Solid object combustion boiler, petroleum heating furnace
12% Garbage incinerator
(b)Block diagram
Zurconia
type O2 sensor
| NOx or |
|
| CO signal |
|
| 21 - On | · Cs |
| 21 - Os | |
O2 | O2 |
|
converter | signal |
|
O2/NOx conversion or CO (ppm)
Full scale is the same as instantaneous value before conversion.
Infrared gas analyzer
(2)Moving average output
1 hr. moving average output (for NOx, SO2) 4 hr. moving average output (for CO)
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