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    Wyświetlanie 1-3 z 3
    Tytuł:
    Mercury content in ash of solid fuels
    Autorzy:
    Urbanek, B.
    Szydełko, A.
    Moroń, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/115843.pdf
    Data publikacji:
    2014
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    mercury in coal
    mercury in ash
    oxy-fuel combustion
    rtęć w węglu
    rtęć w popiele
    spalanie tlenowo-paliwowe
    Opis:
    Mercury emission field measurements were conducted for two types of coal from Polish mines. Total mercury content were evaluated in coal and ash on mercury analyzer atomic absorption spectrometer AMA 254. Obtained result shows that brown coal contains more mercury compared to hard coal (289 ppb and 66 ppb respectively for a polydisperse system). Mercury concentration in ashes is several times higher than for coal which means ash may be a good absorber for mercury. Also, application of oxy-fuel technology results in smaller amount of mercury absorbed in the ash which can be related to higher emission of Hg in the gaseous form.
    Źródło:
    Challenges of Modern Technology; 2014, 5, 2; 39-43
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The fire hazard during combustion of some alternative fuels
    Autorzy:
    Szydełko, A.
    Urbanek, B.
    Moroń, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/115802.pdf
    Data publikacji:
    2013
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    alternative fuel
    biomass
    SRF
    CPT
    fire hazard
    self-ignition
    Opis:
    Alternative fuels are fuels which include: biomass fuel from waste and sewage sludge. Co-firing biomass with coal is now considered as an effective and financially attractive way the use of biomass for energy production. Perhaps in the future this new technology will replace co-efficient technologies, such as gasification in combination of the gas-steam systems, and the use of gas or ethanol from biomass to value highly efficient fuel cells [1]. The use of coal and biomass mixtures can also be a threat to the safe operation of the plant, including in particular the preparation and installation of the fuel supply. Organic matter in biomass (organic fraction) is a complex mixture of fats, proteins, carbohydrates, humic material-go and fatty acids [2–4]. Self-igniting the fuel can be the result of various factors such as chemical, physical or biological agents stored inside a large amount of organic matter. Self-igniting solid fuels storage depends on many factors such as particle size, nature and type of biomass, coal, the moisture content of the fuel, the storage method and the means of ventilation [5]. In order to determine the self-ignition temperature of coal and of biomass: straw pellets and wood pellets, the method called CPT (Crossing Point Test) [18] was used. Apart from this, the elemental composition of these biomass as well as of coal have been marked.
    Źródło:
    Challenges of Modern Technology; 2013, 4, 1; 53-57
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Risks of boiler operation during slagging and fouling process – a new methods for the determination of ash sintering temperatures
    Autorzy:
    Urbanek, B.
    Szydełko, A.
    Czajka, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/115821.pdf
    Data publikacji:
    2013
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    mineral matter
    sintering
    fouling
    Leitz test
    strength method
    pressure-drop method
    materia mineralna
    proces spiekania
    zanieczyszczenia
    test Leitz
    metoda sił
    metoda spadku ciśnienia
    Opis:
    The properties of mineral matter occurs in coal in the form of inorganic compounds leads to slagging and fouling process on boiler heating surfaces, burners and ash hopper. The deposition of ash cause many undesirable phenomena such as heat transfer deterioration, damage to internal parts of the boiler as a result of detachment of large agglomerates and finally, costly shutdowns of the boiler. Standardized method of risk assessment of agglomerates formation and sintered fly ash is determined by four melting temperatures of ash. This measurement is based on visual appraisal of ash sample deformation which is subjective and strongly depends on the experience of the person conducting the test. Especially is hard predict the first two temperatures: deformation and sintering. An article has to present three non-standardized methods for determining the sintering temperature by using physical parameters: pressure drop and minimum force of probe destruction. This type of measurement allows a quantitative way to obtain reliable and meaningful result. The experiment showed that the results of non-standard methods deviate from those set using the Leitz method. This allows to conclude that sintering processes occur at much lower temperatures and changing the shape of the initial (test method Leitz) is not the first symptom of demonstrating the melting of the ash.
    Źródło:
    Challenges of Modern Technology; 2013, 4, 2; 47-52
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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