Environmental Problems

Permanent URI for this communityhttps://ena.lpnu.ua/handle/ntb/33081

Browse

Subject: search.filters.subject.dust

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Emissions of sulfur dioxide and dust at coal power plants of Ukraine
    (Видавництво Львівської політехніки, 2021-03-01) Volchyn, Igor; Haponych, Liudmyla; Bizek, Vladislav; Thermal Energy Technology Institute of National Academy of Sciences of Ukraine; National University of Food Technologies; UN Environmental Expert
    We developed an algorithm for the estimation of harmful emissions depending on the amount of supplied electricity and heat at coal-fired TPP. By this algorithm, we calculated the emissions of SO2 and dust at Ukrainian TPP in 2017 and 2018. The values of SO2 concentrations in dry flue gases at Ukrainian TPP in 2017 and 2018 depending on fuel brand, sulfur content, and method of slag removal in the boiler were in the range of 1520–5900 mg/Nm3, and the general gross emissions of SO2 were about 620 thousand t. The specific emissions of SO2 were at a level of 14–15 g/kWh of supplied electric energy as compared with 1.2 g/kWh – the level for coal-fired plants of EU countries. At Ukrainian TPP, about 100 thousand t of dust were thrown away. The dust concentrations in flue gases at Ukrainian TPP were equal to 300–1800 mg/Nm3. The values of specific dust emissions per 1 kWh of supplied electricity constituted 0.8–5.1 g against 0.2 g/kWh characteristic of present-day coal-fired TPP of EU countries. The level of gross emissions of SO2 and dust at the TPP of Ukraine did not exceed the maximum possible according to the National Emission Reduction Plan of Pollutants from Large Combustion Plants.
  • Thumbnail Image
    Item
    Environmental and resource evaluation of smelter slag
    (Видавництво Львівської політехніки, 2020-02-10) Malovanyy, Myroslav; Ilyash, Oksana; Povzun, Oleksiy; Stepanets, Oleg; Serga, Tatiana; Gubar, Oksana; Serdyuk, Volodymyr; Lviv Polytechnic National University; Donetsk National Technical University
    The gross emission of harmful substances (dust) while unloading the smelter slag of PJSC “Mariupol Iron and Steel Works” into the waste heaps from the dump truck body and during their storage was calculated. The expediency of restoration of blast furnace slag as a siliceous component in cellular concrete was proved. The optimal compositions of cellular concrete mixtures (including the addition of TLS plasticizer – technical lignosulfonate) were determined based on the following criteria: average density of cellular concrete in the dry state and its compressive strength.