Dorog Power Plant
The Dorog Power Plant, which was acquired by Dalkia Energia Zrt. in 1997, produces heat for heating and hot water supply to 3500 homes of two cities, Dorog and Esztergom.
Dalkia Energia upgraded the power plant in 2001: the boilers have been transformed from coal burning to natural gas operation; a combined cycle co-generation unit was built, in which the “prefix” turbine produces electricity; and modernized the power plant’s control system. In addition to natural gas, the boiler also burns the smoke gas emitted by the gas turbine, as well as the bio-gas byproduct (waste) of the neighboring Richter Gedeon Nyrt. The power plant uses a part of the steam produced to generate electricity, while another part gets to the consumer network as steam and hot water. A part of the steam is transformed by the absorption cooler to cold water, thereby optimizing the electricity production of the gas turbine.
As a result of this upgrade, the operation of the power plant has become much more efficient, the efficiency improved, the quantity of electricity produced grew, enabling the reduction of the consumer price. The investment brought on many advantages from the point of view of environment protection too: sulfur dioxide, nitrogen dioxide and dust emissions could be minimized, coal, slag and ash emissions could be excluded, and the load of the road network could be reduced.
On the basis of the favorable experiences, the Dorog Power Plant put the second gas turbine with a capacity of 5 MW into operation in spring 2003.
In 2006, the power plant reached an important milestone in its history: as a result of the technical-technological development, biomass-coal firing became possible.
By the reconstruction of an auxiliary dust coal boiler of the power station, an external fuel recirculation technology was developed which, in addition to coal, can burn wood chips and other biomass products, and chipped agricultural plants such as sunflower stalk or sunflower seed shell. In optimum case, biomass may constitute up to 80% of the fuel used.
This new fuelling method enables the use of quickly renewable energy generation fuels that help improve efficiency and considerably reduce environmental load. Other reasons requiring the extensive use of renewable, environmentally safe energy sources in energy production include the rapid depletion of fossil fuel resources and the need to mitigate damage caused by air pollution, in particular, to reduce the emission of CO2 responsible for the greenhouse effect. |
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