Operating instructions

12
5603 882 - 01
Pyrotec Installation & Operating
Wood Fuel Requirements (continued)
General Information
Saw dust
Fuel code Bulk Density kg/m³ [lb/ft³] Water content % Fuel Size Description
a S130 [8.1] W10 to W20 C1 Sawdust, untreated (planing shop)
b1 S200 [12.5] W20 to W35 C1 Sawdust, untreated (sawmill)
c2 S250 [15.6] W35 to W50 C1 Sawdust, untreated (sawmill)
Wood chips
Fuel code Bulk Density kg/m³ [lb/ft³] Water content % Fuel Size Description
b2 S200 [12.5] W20 C7 Forest wood chips, soft, untreated
c1 S250 [15.6] W20 to W35 C7 Forest wood chips, soft, untreated
d1 S300 [18.7] W20 to W35 C7 Forest wood chips, soft/hard, untreated
d2 S300 [18.7] W35 to W50 C7 Forest wood chips, soft, untreated
e1 S350 [21.8] W20 to W35 C7 Forest wood chips, hard, untreated
e2 S350 [21.8] W35 to W50 C7 Forest wood chips, soft/hard, untreated
f1 S400 [24.9] W35 to W50 C7 Forest wood chips, hard, untreated
Shavings and chips
Fuel code Bulk Density kg/m³ [lb/ft³] Water content % Fuel Size Description
g S130 [8.1] Less than W15 C7
Shavings & chips from wood remnants,
dry, mixed
h S200 [12.5] Less than W15 C7
Shavings & chips from wood remnants,
dry, mixed
i S250 [15.6] Less than W15 C7
Shavings & chips from wood remnants,
dry, mixed
Pellets and briquettes
Fuel code Bulk Density kg/m³ [lb/ft³] Water content % Fuel Size Description
j S350 [21.8] Less than W15 P4
Briquettes from wood remnants c in. (20
mm) to max. 2 in. (60 mm)
k1 S650 [40.6] Less than W10 P1
untreated up to e in. (10 mm)
k2 S650 [40.6] Less than W10 P2
untreated e in. to c in. (11 mm to 20 mm)
Maximum water content
The maximum allowable water content of the fuel for Pyrotec systems is limited to 50%.
The water content impacts the maximum boiler output.
Non-wood fuels
Non-wood fuels even if consisting of biomass, such as needles, foliage, grain, straw, fruit pits, etc, are unsuited
as fuel for boiler operation and may not be used.
Limitation super fines and dust [wood particles smaller than
1
/32 in. (1.0 mm)]
Max. 10.0% of the total mass; if fuel does not comply with this limit the following process may occur:
- Temperature peaks
- Slag formation
- Even higher temperature
- This process leads to damage by overheating and can affect refractory materials.
Elevated values are especially critical for remnant wood in combination with elevated values of Chlorine and Sulphur.
Suitable fuel types for Pyrotec systems
- Bulk density S in kg/m³ [lb/ft
3
], water content (W) in %, size C1, C7, P1, P2, P4 as per CAN/CSA-B366.1-M91.
Note: Fuel for Pyrotec systems allow for a max. of 50% water content (W).
Note: For size of wood chips, see page 11.