Production / Unit 6

MAIN CHARACTERISTICS OF THE PRODUCTION UNIT 6

Units Values
Power (generator) MW 600
Net output MW 542,3
Own consumption MW 57,7
Spec. use – guaranteed value (full capacity) kJ/kWh 8.441
Fresh steam – flow rate t/h 1515
Fresh steam – pressure/temperature bar/°C 275/600
Reheated steam – pressure/temperature bar/°C 56/610
Feed water temperature °C 290
Unit’s operating power range – min/max % 42/100
Load change MW/min 10
BOILER Benson, tower type
Fresh steam flow rate kg/s 420,7
Fresh steam pressure bar 275
Fresh steam temperature °C 600
Reheated steam pressure bar 56
Reheated steam pressure °C 610
Temperature of feed water to boiler °C 290
Combustion (lignite – Velenje coal mine) PCC, tangential, NOx optimised burners
Ignition fuel fuel oil
Coal mills – blower type mills 8
Flue gas temperature at boiler outlet °C 145
Flue gas cleaning SCR-DeNOx, electrostatic precipitator, wet DeSOx process
Flue gas discharge no additional heating – to the cooling tower
EMISSIONS: Limit values
SOx mg/nm3 < 100
NOx mg/nm3 < 150
CO mg/nm3 < 250
Dust mg/nm3 < 20
TURBINE ALSTOM – three-part system with single reheating
Nominal power MW 600
Nominal rotations min-1 3.000
Nominal pressure bar 275
Number of regenerative heaters 9+1
Cooling system natural draft cooling tower
Cooling water preparation decarbonisation, lamellar reactor
GENERATOR ALSTOM – 50WT 23E-138
Nominal power MVA 727
Frequency Hz 50
Nominal cos(φ) cos φ 0,85
Nominal voltage kV 21
Step-up transformer 21/400±8×1.25 % Kv 710 MVA
Cogeneration of heat Heat station 3
Installed capacity MW 120

 

By-products ash, gypsum, slag
sales of gypsum and ash (up to 50 % of quantity)