Viadrus HERCULES ECO, Руководство по эксплуатации и установке

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4. Boiler description
4.1 Boiler drum construction
The main boiler component is the cast iron sectional boiler drum made of grey cast iron according to
EN 1561.
•
Central sections – quality 150 (previously Č SN 42 2415)
•
Front and rear sections – quality 200 (previously Č SN 42 2420)
The boiler pressure components comply with strength requirements according to EN 303-5.
The boiler drum consists of cast iron sections by means of forced on boiler insertions and is secured with
anchor bolts. The sections create a combustion chamber and the ash pan space, the water space and the
convection section. The ash pan space is divided from the combustion chamber through a solid water-cooled
grate.
Between the combustion chamber and the convection part of heat exchanger there are installed the ceramic
plates that regulate combustion and influence positively the emission values.
In the flue gases ducts of the heat exchanger convection part there are inserted the turbulators in order to
reduce the flue gases temperature thus to increase the boiler efficiency.
The boiler rear section has in its upper part a smoke adapter and heating water flange (G 1 1/2“), then in
lower part the return water flange (G 1 1/2“) with a sleeve piece for filling and discharging cocks (G 1/2“). To
the front section there are mounted the stoking and ash pan doors; the combustion chamber door is behind
them.
The whole boiler drum is insulated by using a health harmless mineral insulation which reduces the heat
interchange losses in surroundings. The steel boiler shell is treated by applying a good quality powder paint.
Fig.no. 4 Cast iron boiler drum
1. Front section
2. Middle section
3. Rest section
4. Anchor bolt
5. Stoking door
6. Ash pan door
7. Smoke extension