BIO, BIOA, ZIO - Combustion 911

Project planning information
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6.6 Purging air/cooling air
Cooling air at 20°C
Air volume at rated capacity [%]
Purging/cooling air volume for burners
6
5
4
3
2
1
BIO/ZIO..K
BIO, ZIO
BIO/ZIO..KB..E
0
0
700 800 900 1000 1100 1200 1300 1400
Kiln temperature °C
While the burner is switched off and depending on the furnace
temperature, there must be a certain air flow in order to ensure
safe ignition and monitoring of the burners, and for cooling
the burner components.
The relative air volume in percentage values, based on the
air volume for the rated capacity of the relevant size, is given
in the Purging/cooling air volume for burners diagram. For
hot air, the values on the right-hand axis are based on the
standard air volume for the relevant rated capacity.
The air fan must remain switched on until the furnace has
cooled down completely.
12
10
8
6
4
2
Cooling air at 450°C
Air volume* at rated capacity [%]
* The cooling air volumes measured in standard
cubic metres are converted into percentage values.
6.7 Emissions
NOX
[mg/m3]
5% O2
600
500
400
300
200
100
70
50
H (450 °C)
R, K (20 °C)
H (20 °C)
K (450 °C)
10 50 100
Capacity [%]
Flame shape:
R = Normal
H = Long
K = Flat
T Furnace
= 1000°C
Emissions for cold-air operating mode do not exceed the limits
stipulated by the German Clean Air Directive.
NO X values depend on the temperature, burner head, combustion
chamber, furnace chamber, λ value and output (NO X
values on request).
If operated with LPG, NO X values are approx. 25% higher.
BIO, BIOA, ZIO · Edition 05.10