Feeding wood chips and energy reed at a defined rate under the boiler's various operating conditions.
The scope of supply ran from conveyor belts 5/a and 5/b on the power plant's main coal conveying route (converting the discharge chute into a chute with a diverter flap) to the four feed nozzles in the side wall of the boiler. The system includes a new silo-filling, fixed-speed rubber belt conveyor; a day silo with a usable volume of 300 m3, fitted with a rotary spreader and a discharge screw; two chain scraper conveyors with variable frequency drives; and a constant-speed weigh belt conveyor with an electronic belt scale, verified by the OMH.
Our company's task was the complete architectural, mechanical, control and electrical power construction.
Client: Vértesi Erőmű Zrt.
Feeding system characteristics:
- Fuel: wood chips / energy reed
- Bulk density: 0.269 t/m3 / 0.129 t/m3
- Fuel consumption: 17.0 t/h / 13.6 t/h
Main equipment:
Silo discharge screw
- Supplier: Raumaster Oy
- Type: CSR-X3
- Conveying capacity: 18 – 150 m3/h
- Control method: variable frequency drive
- Control range: 5 – 90 Hz
- Screw speed: 5–45 rpm
- Screw diameter: 550 mm
- Main motor: 37 kW, 1,500 rpm
- Agitator motors: 2 x 1.5 kW, 1,500 rpm
Silo filling conveyor
- Supplier: Flex-Coop Kft.
- Conveying capacity: 180 t/h; 400 m3/h (wood chips)
Silo discharge scraper conveyor
- Supplier: EWB Kft.
- Conveying capacity: 24.0 t/h, 90 m3/h (wood chips)
- Control range: 10 – 80 Hz
Weigh belt conveyor
- Supplier: EWB Kft.
- Conveying capacity: 24.0 t/h, 90 m3/h (wood chips)
Feed scraper conveyor
- Supplier: EWB Kft.
- Conveying capacity: 24.0 t/h, 90 m3/h (wood chips)
- Control range: 10 – 80 Hz
