BENEKOV K14, Operation And Installation Manual

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4.2. Burner description
The burner is designed to burn solid fuel in the form of pellets. These must meet exact requirements - see
chap. 3. Burner operation is automatic and does not normally require supervision. The system of the
refractory rotary furnace prevents the slag, one of the components of the burning process, to adhere to it. By
rotating the furnace the ash and slag are moved forward until they are completely removed from the burner.
As the adhesion is eliminated the burner cleaning process is easier and the service life of the burner is
significantly prolonged.. The burning fuel is aerated and stirred along the furnace which intensifies the burning
process and enables perfect combustion of the delivered fuel.
The burner has a very low power consumption.
In cooperation with the modern programmer the burner is equipped with a safety device which interrupts the
fuel supply in the event of system overheating, flame loss in the furnace or fan failure. When the power
supply is interrupted the fuel feed is automatically switched off so the fuel that remains in the furnace does
not cause damage to the burner.
4.3. Burner operation
The operation of the burner starts by supplying the fuel from the store (9) via a screw feeder (8) connected to
the burner itself by means of a flexible hose (7) and a connecting elbow (6). Subsequently, the fuel dose is
moved by the screw feeder in the burner (12) into the rotary furnace (1). After there is sufficient supply of the
fuel to the burner ignition by a coil (13) follows. After the ignition the burner switches to normal operation
mode according to pre-set parameters. The air necessary to burn the fuel is supplied via the fan (10) through
the aeration chamber (2) to the rotary furnace (1) and a certain amount of air flows through the chamber (5)
onto the ignition coil (13). The air inlet to the burner is located at the bottom of the burner. During the
operation of the burner a mechanism (11) rotates the furnace (1) and the aeration chamber (2). The rotation
speed is adjustable. The combustion residue is moved to the front of the burner where it falls into the boiler
ash drawer.
Fig 5 Basic view of the rotary burner