Abstract
In Poland, electricity is still produced mainly in conventional power plants where fuel and water are materials necessary to generate the electricity. Even in modern power plants operating according to the principles of the sustainable development, this involves a high intake of water and considerable production of wastewater. This, in turn, necessi-tates the application of some technological solutions aimed at limiting the negative impact on the environment. The Jaworzno III Power Plant – Power Plant II is located in Jaworzno, Silesian Province, Poland. In order to minimise the negative impact on the surface water, the plant replenishes the cooling circuit with the mining water obtained from the closed-down Jan Kanty mine. The paper presents a stability assessment of the chemical composition of the treated mining water used to replenish the cooling circuit based on the data from 2007–2017.
Highlights
Production of electricity in Poland is carried out mainly in conventional power plants than e.g. in hydropower plants [1], so the necessary resources include fuel and water
A maximum of 15 parameters were measured in the samples, while this paper concerns ions whose increased concentration is typical for mine water: sulphate (SO42-) and chloride (Cl-) ions as well as pH and electrical conductivity (EC)
During months in which the analyses were carried out, a mix of mine water and water sourced from Biała Przemsza river was used to make-up the losses in the cooling circuit that are characterized by clearly better chemical parameters: lower electrical conductivity and concentration of chloride and sulphate ions
Summary
Production of electricity in Poland is carried out mainly in conventional power plants than e.g. in hydropower plants [1], so the necessary resources include fuel and water. Generation of electricity in conventional power plants is carried out in a three-stage energy conversion process. Superheated steam is used to move the blades of the turbine driving the generator in which mechanical energy becomes converted into electricity [2]. Electricity generation requires large quantity of water, in modern plants, it is carried out in accordance with the sustainable development principle in the manner that is least detrimental to the environment. Due to the high purity requirements for water used in process circuits and for the protection of the quality of surface waters that are often a source of drinking water, power plants use their own water treatment plants and wastewater treat-. Some amount of water is reused to supplement the losses in the circuits with lower quality requirements [3, 4]
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