Chemical Treatment of Water for Steam Boilers in Mining PowerudComplex “Oslomej”in Kicevo

摘要

Abstract. Mining power complex ”Oslomej” in Kicevo is a thermal power plant that achieves anudannual production of about 700 GW/h. Oslomej uses drinking water for operating of the steamudboilers.. Since drinking water does not meet the required criteria for the working of steam boilers, it isudnecessary to be chemically treated. The chemical treatment is consisted of two different procedures:uddecarbonation and demineralization. Decarbonation is performed in quick concrete reactor -udaccelerator with a solution of Ca(OH)2 and FeCl3, and demineralization is performed using ionudmodifiers. As a result of the process of decarbonation, there is а partial water refill which reduces theudconductivity. After applying the process of demineralization there is a complete removal of theudmineral substances, so that the total water hardness is 0 degrees German (ºD), SiO2 is less than 0,2udmg/L, and the conductivity (σ) is smaller than 0,5 μS/cm. Filtering is done using sand filters and theudrecommended intensity of the flow of filtered water is 40 - 60 m3/h. The analyses of drinking,uddecarbonized and demineralized water are made daily. This paper describes the chemical treatment ofudwater for steam boilers in “Oslomej”. There are shown the results from the analysis of drinking,uddecarbonized and demineralized water in randomly selected days.