7
1.3.1. Burning Other Fuels
Uncontaminated paper and cardboard may only be used for igniting fire in
the boiler. Mixtures of various clean paper and cardboard may only be burned if
mixed with wood. Papers and colour magazines must not be burned and should
be recycled. One shall keep in mind that impregnates, inks and other
components used for their production will significantly pollute the boiler's
convection chambers and the natural environment.
We also advise against burning plastics in various forms. Keep in mind
that smoke generated during combustion of plastics will contain substances,
which are poisonous and harmful to human and that these substances will fall
down in direct vicinity of the chimney. Do not burn PVC products under any
circumstances, e.g.:
- butter or margarine boxes
- transparent plastic bottles
- jewel boxes (CD boxes) or toys
- plastic building materials
- polyamide (PA) products, such as textiles
Some plastics identified as PE, PP, PET may be burned, provided that their volume
does not exceed 5% of the fuel volume (e.g. of wood) and the combustion temperature is not
lower than 850o C.
Approximate data of different fuels
Fuel type
Burning time cubic meter weight
Moisture content
( h)
(kg ) ( % )
wood pieces
4-6
300 30
chips
3-5 155 30
sawdust 2-4 145 30
bark
2-5
200 30
coal
6-8 - -
1.4. Technical Description
This manual applies to boilers rated from 80 to 160 kW manufactured in
the plate version.
Moderator boilers (Fig. 1) are boilers operating in the top-burning system.
Walls and grate are water cooled and are made of boiler-grade sheet metal
plates. Manual, top fuel charging, mechanical ash removal from the grate,
