Viessmann KOB PYROTEC, Technical Manual

Page: 43 / 88

6.10 Fuel
The PYROTEC grate combustion has been specially developed for the
automatic combustion of dry and moist wood fuels (waste wood, wood
pellets or woodchips from forest thinnings up to max. W50). It com-
bines the benefits of underfeed combustion with the advantages of
grate combustion to optimum effect.
Suitable fuels
The Pyrotec is suitable for the following dry to moist wood fuels in
accordance with ÖNORM M 7133:
Note
The following are unsuitable types of fuel: Fossil fuels and those con-
taining sulphur, such as anthracite and coke, as well as plastics, grain,
straw, material soaked in flammable liquids and waste wood treated
with plastics or wood preservatives.
Bulk density S (kg/m³) Water content W (%) Size G (mm) Fuel
S 130 W10 to W20 G30/50 Natural sawdust
S 200 W20 to W35 G30/50 Natural sawdust
S 200 W20 G30/50 Soft natural woodchips from forest thinnings
S 250 W20 to W35 G30/50 Soft natural woodchips from forest thinnings
S 250 W35 to W50 G30/50 Natural sawdust
S 300 W20 to W35 G30/50 Soft/hard natural woodchips from forest thinnings
S 300 W35 to W50 G30/50 Soft natural woodchips from forest thinnings
S 350 W20 to W35 G30/50 Hard natural woodchips from forest thinnings
S 350 W35 to W50 G30/50 Soft/hard natural woodchips from forest thinnings
S 400 W35 to W50 G30/50 Hard natural woodchips from forest thinnings
S 130 < W15 G30/50 Dry, mixed shavings, chippings from waste wood
S 200 < W15 G30/50 Dry, mixed shavings, chippings from waste wood
S 250 < W15 G30/50 Dry, mixed shavings, chippings from waste wood
S 350 < W15 G30/50 Briquettes from waste wood D 40 to 60 mm
S 650 < W10 Standardised natural pellets D 6 to 10 mm
S 650 < W10 Standardised natural pellets D 11 to 15 mm
6.11 Fuel discharge by means of screw conveyor
Discharge conveyor, pellet, D = 120 mm
Part no. 7837 954
As pellet transportation from a rectangular room with the possibility of
filling from the top. The pellets trickle via a tilted intermediate floor into
the conveyor channel. The supply screw conveyor found inside this
channel transports the pellets to the outlet.
Standard delivery:
■ Discharge conveyor for pellets according to project drawing
To be carried out on the customer side:
Delivery and installation of the intermediate floor (preferably made of
wood) incl. static calculation and sizing. The forces resulting from the
weight of the combustion material (approx. 650 kg/m3) should be
transferred to the silo floor and not through the discharge conveyor.
Observe this when constructing the intermediate floor.
Note
Price given per m; total length in m = length of conveyor channel
Note
For increases of 0° to 8°; exclusively for pellets; boiler output up to
max. 1250 kW
Specification
Pellet discharge conveyor
D=120 mm
Part no. 7837 954
a mm < 9250
b mm > 750
c mm < 10000
Design information
(cont.)
PYROTEC
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5822 511 GB
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