Sadržaj hlorida i fluorida u dimnom gasu tokom sagorevanja domaćih lignita kao parametar pri projektovanju postrojenja za odsumporavanje dimnog gasa

Abstract

Od nedavno polje istraživanja sagorevanja uglja obuhvata i istraživanje nečistoća, posebno halogenih elemenata (F, Cl, I i At). Emisije hlorida i fluorida iz procesa sagorevanja zavise od sadržaja i oblika ovih elemenata u uglju, procesa sagorevanja i opreme za smanjenje emisija. Ispitivanje sadržaja hlorida i fluorida u uglju i dimnom gasu je posebno značajno pri projektovanju postrojenja za odsumporavanje dimnog gasa, sastavnog dela modernih termoelektrana, koje obezbeđuje ispunjenje propisanih zahteva u pogledu emisije _O2. U okviru sistema za odsumporavanje dimnog gasa, prisustvo HCl može dovesti do povećanja potrošnje sorbenta, a HCl i HF imaju uticaj na preradu otpadnih voda. U ovom radu su prikazani dobijeni rezultati sadržaja hlora i fluora u domaćim lignitima i njihova koncentracija u dimnom gasu. Cilj istraživanja je bilo utvrđivanje referentnih koncentracija Cl i F u dimnom gasu koje će biti korišćene pri projektovanju postrojenja za odsumporavanje dimnog gasa. PR Projekat Ministarstva nauke Republike Srbije, br. III 42010.

Recently, research in the field of coal combustion include impurities, specifically halogen elements (F, Cl, Br, I and At). Emission of chlorides and fluorides from the combustion depends on content and forms of these elements in coal, combustion process and emission reduction equipment. Examination of chlorides and fluorides content in coal and in flue gas is particularly important for design of flue gas desulphurisation plant, the integral part of the modern power plants which ensure meeting the requirements of SO2 emission regulations. In flue gas desulphurisation facilities, the presence of HCl may increase sorbent consumption and HCl and HF have the influence on wastewater treatment. This paper presents the results of chlorine and fluorine contents in domestic lignites and their concentration in flue gas. The aim of investigation was to determine the reference Cl and F concentrations in flue gas that would be used in the design of flue gas desulphurization plant.