The occurrence of trace elements in flue gases from circulating fluidized bed boilers

• Autorzy: Konieczyński J. , Stec K.

Warianty tytułu

PL

Występowanie metali w spalinach z kotłów z cyrkulacyjnym złożem fluidalnym

• Języki publikacji: EN

Abstrakty

EN

The emission of dust from coal fired furnaces introduces a lot of contamination into the environment, including dangerous metal compounds, which occur as trace elements in hard and brown coal. After the coal is burnt, they are contained in the grains of respirable dust, which creates health hazard. The results of investigations into the distribution of several trace elements in granular composition of ash emitted from CFB boilers used in coal-fired heat and power station are presented. The research material was taken by means of a cascade impactor, enabling a different granulometric fraction to be separated from a stream of dust that penetrated the electrofilter. The ICP-AES method (inductively coupled plasma atomic emission spectroscopy) was used to determine trace elements after prior mineralization of samples by microwave method. The Authors presented the results of measurements and analyses, determining the ranges of trace elements’ occurrence in dust, characterizing the distribution in PM1, PM2.5 and PM10 granulometric fractions and determining the emission factors.

PL

Emisja pyłu ze źródeł energetycznych powoduje wprowadzenie do środowiska wielu zanieczyszczeń, w tym związków niebezpiecznych metali, występujących jako pierwiastki śladowe w węglu kamiennym i brunatnym. Po spaleniu węgla znajdują się one w ziarnach pyłu respirabilnego, co stwarza zagrożenie dla zdrowia ludzi. Przedstawiono wyniki badań nad dystrybucją wybranych kilkunastu pierwiastków śladowych we frakcjach ziarnowych popiołu lotnego emitowanego z kotłów z cyrkulacyjnym złożem fluidalnym stosowanych w elektrociepłowniach opalanych węglem. Materiał badawczy został pobrany za pomocą impaktora kaskadowego umożliwiającego wydzielenie ze strumienia spalin odpylonych w elektrofiltrze frakcji pyłu o różnej wielkości ziarna. Do oznaczenia pierwiastków śladowych wykorzystano metodę atomowej emisyjnej spektrometrii o wzbudzeniu plazmowym ICP-AES po uprzedniej mineralizacji próbek metodą mikrofalową. Przedstawiono wyniki pomiarów i analiz, określając zakresy występowania pierwiastków śladowych w popiele lotnym, charakteryzując dystrybucję we frakcjach ziarnowych PM1, PM2,5 i PM10 i wyznaczając wskaźniki emisji.

Słowa kluczowe

EN

hazardous air pollutants; air contamination with dust; coal combustion; CFB boilers; grain size composition of flue ash; trace elements in the emitted dust; distribution in grain size fractions; emission factors

PL

emisja pyłów; impaktor kaskadowy; oznaczanie pierwiastków śladowych; kocioł z fluidalnym złożem cyrkulacyjnym

• Wydawca: Institute of Environmental Engineering, Polish Academy of Sciences
• Czasopismo: Archives of Environmental Protection
• Rocznik: 2010
• Tom: Vol. 36, no. 4
• Strony: 3--19
• Opis fizyczny: Bibliogr. 44 poz., tab.

Twórcy

autor

Konieczyński J.

autor

Stec K.

• Institute of Environmental Engineering of the Polish Academy of Sciences M. Skłodowskiej-Curie str. 34, 41-819 Zabrze, Poland,

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