Data
sheet
Wood Fuels
Minimum Requirements / Information
Köb Holzheizsysteme GmbH, Flotzbachstr. 33, A-6922 Wolfurt, Tel. +43/5574/6770-0, Fax 65707, E-Mail: [email protected]
Subject to technical changes
1010-2
2009-03-01_GB
Conveyor augers diameter min. 20 cm; drop-off route, rotary valve cross-section min. 600 cm
2
Consequence of overstepping particle size:
- Extra expenditures for correcting malfunctions
- Shortened service life of the conveyor augers and drives
5) Bulk density S (kg/m³), water content W (%), size G (mm) as per ÖNORM M 7133
In automatically loaded boiler plants, the wood fuels that come to be used should be individually listed in offers and
orders as follows:
a)
S 130 W10 to W20
G30/50 Sawdust, untreated (planing shop)
b1)
S 200 W20 to W35
G30/50 Sawdust, untreated (sawmill)
b2) S
200
W20
G30/50 Forest wood chips, soft, untreated
c1)
S 250 W20 to W35
G30/50 Forest wood chips, soft, untreated
c2)
S 250 W35 to W50
G30/50 Sawdust, untreated (sawmill)
d1)
S 300 W20 to W35
G30/50 Forest wood chips, soft/hard, untreated
d2)
S 300 W35 to W50
G30/50 Forest wood chips, soft, untreated
e1)
S 350 W20 to W35
G30/50 Forest wood chips, hard, untreated
e2)
S 350 W35 to W50
G30/50 Forest wood chips, soft/hard, untreated
e3)
S 350 W50 to W60
G30/50 Forest wood chips, soft, untreated
f1)
S 400 W35 to W50
G30/50 Forest wood chips, hard, untreated
f2)
S 400 W50 to W60
G30/50 Forest wood chips, soft/hard, untreated
g)
S 130 less than W15
G30/50 Shavings & chips from wood remnants, dry, mixed
h)
S 200 less than W15
G30/50 Shavings & chips from wood remnants, dry, mixed
i)
S 250 less than W15
G30/50 Shavings & chips from wood remnants, dry, mixed
j)
S 350 less than W15
G30/50 Briquettes from wood remnants D 40 to 60 mm
k1)
S 650 less than W10
Pellets conforming to standards, untreated D 6 to 10 mm
k2)
S 650 less than W10
Pellets conforming to standards, untreated D 11 to 15 mm
6) Maximum water content allowed, W, (percentage by weight of the total mass)
The maximum water content allowed in the fuel when entering the furnace should be taken from the spec sheets for
the furnace series. With a pre-dryer installed between the furnace and the fuel storage site, extra water content can
be in the fuel stored (see specifications in reference to the order). The water content influences the maximum
furnace output possible, the heat emission required to the pre-dryer and thus the maximum heat emission possible
to the consumers.
7) Other information
7.1) Ash and cleaning
Untreated wood without bark has a proportion of ash less than 0.5% of the fuel mass supplied. All the
specifications regarding cleaning involved are based on untreated wood with bark attached with an ash amount
of 0.8%. The cleaning and maintenance involved for other wood fuels should be adapted according to the
amount, the specific weight and the behaviour of the ash.
7.2) Changing fuels
A great change in fuel quality, such as bulk density, water content, dust proportion or ash content might make a
manual correction of the firing parameters necessary (see Operating Manual).
8) Non-woody fuels from biomass
Non-woody fuels from biomass, such as needles, foliage, grain, straw, fruit pits, etc, are usually unsuited as fuel for
trouble-free operation and thus are not approved.
9) Wood fuels: rules, regulations and standards
Germany: 1
st
BImSchV
1
dated 14 Mar 97, amended on 2 Aug 2001; page: Fuels nos. 5 to 7
Austria:
FAV dated 18 Nov 1997 "Feuerungsanlagenverordnung" (Furnaces Act § 3.(1) 3. Solid Fuels
Switzerland: Luftreinhalteverordnung LRV (Swiss Clean Air Act) dated 16 Dec 1985 (Standing: 28 Mar 2000)
DIN 51731
Compressed Wood from Untreated Wood (1993)
ÖNORM M 7135
Compressed Wood from Untreated Wood or Untreated Bark (1998)
ÖNORM M 7136
Wood Pellets, Quality Assurance, Transport Logistics and Storage Logistics
ÖNORM M 7133
Wood Chips for Energetic Purposes (1998)
EN 303-5
Heating Boilers for Solid Fuels, Table 8 "Test Fuels“
CEN/TS 14961
Solid Organic Fuels
1
BImSchV
=
Bundes-Immissionsschutzverordnung
[German Federal Emissions Control Act]
