TECHNICAL FEATURES AND DIMENSIONS
4
2.
TECHNICAL FEATURES AND DIMENSIONS
2.1.
Technical features
The boiler is made of steel, with horizontal construction, fire-tube type. The heat transfer from
the exhaust gases towards the water is done primarily by thermal radiation in the first two
passes, and in the third is done by thermal conduction. The return of the gases from the second
way toward the third way is done in the door upper side.
PLC boiler is built in such a way so that all surfaces that are exposed to the flame are cooled by
water, including the inferior side where the ash and the burning rest are collected. The unique
construction, the great number of exhaust pipes and the stainless steel turbulators, big firebox
volume and the water from the boiler, as much as the symmetric construction determines a high
efficiency.
The PLC boiler is designed to work efficiently with an automatic pellet burner. The boiler can also
be used with liquid or gas fuels, by mounting an appropriate burner respectively.
DESCIPTION OF COMPONENTS
Steel boiler body with horizontal tube exchanger
Removable rear smoke box with inspection cleaning door and flange for exhaust fan
installation
Door for access to the fire chamber for cleaning the heat exchanger and the burner
Ash box positioned on the lower part of the boiler
Glasswool body insulation of 50 mm thickness
Electrostatically painted external covers
Automatic pellet burner with feeder
Fuel tank
2.2.
Function principle
The function of the boiler is is based on the counter-pressure that is created by the returnable
flame in the combustion chamber and by the transmission of heat with radiation. The burned
gases reverse their course at the bottom of the fire chamber, surrounding this way the flame,
which does not get into immediate contact with the surrounding walls.
The burned gases are then guided towards the smoke box through the fire tubes where the heat
transfer is mainly through conductivity, and afterwards evacuated to the chimney. The smoke
box is equipped with an inspection and
cleaning door, which also actions as an
explosion relief. The turbinators in the
tubes create turbulance to the burned
gases, so as to get into a continuous
contact with the walls of the tubes and
increase the heat transfer efficiency.
The door has an insulation cord to ensure
air-tight closing. The door is equipped
with a flange for burner mounting and an
inspection eye for flame inspection.
Fig 1.
Boiler function scheme
