The Siersza Power Plant in Trzebinia is a part of The Southern Power Concern S.A. Katowice since 2000. It is situated in the north-western part of the Malopolska Voivodeship in the Trzebinia administrative territory and was constructed between 1962-1970 as a system power plant.
Units with the OP380k boilers
Boilers 3, 4, 5, 6 are OP380k boilers produced by RAFAKO - Racibórz. The OP380k boiler is a radial-flow coal sludge-fired boiler which is a hanging double draught natural circulation drum boiler with a secondary steam superheater. The boilers have been modernised many times in order to achieve the nominal power and the amount of nitrogen and sulfur oxide emissions required by the relevant regulations.
In boilers 3 and 5 the low-emission combustion systems have been installed. They use the low emission burners produced by Babcock E.L. In boilers 4 and 6 the system of preparing an ash-air mixture has been reconstructed and the combustion process according to the solution of the Łaziska power plant has been improved. Both solutions allow a lower level of nitrogen oxide emission to be achieved, and, additionally, conform to the level of carbon oxide emission.
Parameters:
Parameters:
Coal-fired boilers 3, 4, 5 and 6 - the OP380k Rafako type
| Nominal power of the boiler (WMT) | 303.7 MWt |
| The amount of fresh steam | 105.6 kg/s |
| Pressure of the fresh and secondary steam | 13.2/2.69 MPa |
| Temperature of the fresh/secondary steam in the load range 50÷100 % | 540/540°C |
| Excess air (l) in the bed furnace (at WMT) | 1.2 |
| Temperature of the furnace gas at the steam outlet (at WMT) | <=150 °C |
| Rotating four chamber air heater | |
| Boiler efficiency (at WMT and with required coal - 16.7 MJ/kg) | 91.0% |
| Minimal load of the boiler with auxiliary fuel . | 60% |
TurbineTK120
The TK120 turbines - in units 3, 4, 5 and 6 the OP380k boiler works with the TK120 turbine (Zamech Elbląg). The TK120 turbine is an impulse condensation steam bleeding turbine, three-cylindrical with 6 non-regulated steam extractions and with an interstage steam superheater.
The electric power of the unit is transmitted through the unit transformator of 150 MVA to the switching station of 110 kV (units 3 and 6) or of 220 kV (units 4 and 5).
On turbine 6 a low-pressure impulse impeller has been put on a reaction impeller. The result was the reduction of single heat consumption within the whole system of turbines by 4.2% and the increase of electric power within the whole system of turbines by 4.4%.
Parameters:
The electric power of the unit is transmitted through the unit transformator of 150 MVA to the switching station of 110 kV (units 3 and 6) or of 220 kV (units 4 and 5).
On turbine 6 a low-pressure impulse impeller has been put on a reaction impeller. The result was the reduction of single heat consumption within the whole system of turbines by 4.2% and the increase of electric power within the whole system of turbines by 4.4%.
Parameters:
The turbines 3, 4, 5 and 6 - the TK120 ZAMECH Elbląg type, impulse, axial-flow, three-cylinder with the six non-regulated steam extractions, condensation with the possiblity of steam bleeding for heating purposes.
| Pressure of the fresh/secondary steam | 124.5/24.8 bar |
| Temperature of the fresh/secondary steam | 535/535°C |
| Intensity of flow | 105.4 kg/s |
| Temperature of the feeding water | 230°C |
| Condenser type | bipolar, two stream |