RE-BOIL 5.5/320/PA

Plant description:
Heat recovery thermal oil boiler on flue gas coming from solid fuel combustion furnace (solid wood biomass, such as wood chips, bark, sawdust).

The heat recovery boiler is multitubular type, consisting of radiant channels and convective tubes bundle, equipped with boiler cleaning system (compressed air soot blowers), lower hoppers for the collection of ashes and dust, refractory expansion joint connecting furnace post-combustion chamber with boiler inlet, instrumentation and safety devices.

Two different thermal oil circuits are foreseen: High Temperature (HT) thermal oil loop and Low Temperature (LT) thermal oil loop.

Technical data RE-BOIL 5.5/320/PA:
– Heat output to HT thermal oil: 5 MW
– HT thermal oil temperature (in/out): 250/310 °C
– Heat output to LT thermal oil: 0,5 MW
– LT thermal oil temperature (in/out): 130/250 °C
– Boiler design pressure: 10 barg

In order to maximize the boiler efficiency, downstream the thermal oil heat recovery boiler an economizer for combustion air preheating (LUVO) is integrated.

The thermal oil heated up to temperature of about 310 ° C feeds an ORC (Organic Rankine Cycle) CHP turbogenerator for the combined generation of electricity (1000 kWel) and heat available as hot water flow.