Biomass CHP Boiler Plant – 5.4 MW Thermal and 995 kWe Turbine
Capacity
A lightly operated, complete biomass CHP boiler plant featuring a 9.5
MW bubbling fluidized bed boiler (BFB), designed for wood-based fuels.
The plant includes a back-pressure steam turbine and a heat exchanger
for hot water production from back-pressure steam.
The plant was built by Estonian Filter Solutions, a company highly
experienced in steam boiler plant engineering and EPC contracting. The
BFB steam boiler was delivered by Vapor Boilers Finland. The steam
turbine was manufactured by Triveni Turbines (India), in combination
with a generator and controls from ABB. Other key equipment includes
KSB pumps, conveyors from Technobalt AS, and rotary airlock valves
from Rotolok UK. The power plant was commissioned in 2013 and operated
at partial load until 2015.
The control system, developed by Filter Solutions, is installed on PCs
and includes standard visual process screens. The control room is
located remotely from the plant. Local process controllers are Siemens
S7-00 series PLCs, except for the steam turbine, which uses Honeywell
controllers.
Delivery includes the complete technological system—from the fuel
receiving station to the outgoing 400 kV switch breaker in the
electrical system, and to the hot water pumps for thermal energy
distribution. A metal-frame building with sandwich-type panels and
integrated building technology is also included.
Plant Technical Characteristics
• EPC Contractor: Filter Solutions, Estonia
• Commissioned: 2013
• Operation Stopped: 2015
• Thermal Capacity: 5.4 MW (Hot Water)
• Electrical Capacity: 995 kW / 400V / 50Hz
• Designed Fuel Types: Wood chips, bark, sawdust, demolition wood
• Fuel Moisture Content: 35–55%
• Steam Boiler: Vapor BFB-9.5MW
• Steam Capacity: 12.6 tons/hour at 26 bar(a) / 400°C
• Turbine Type: Back-pressure
• Steam Turbine Model: Triveni TST-1025HB
• Alternator: ABB 1248 kVA / 400V / 50Hz