Title:
Flue Gas Chemistry of NO and KCl during Injection of Ammonium Sulphate - An Experimental Investigation in a Biomass Fired BFB Boiler
Author(s):
Kassman, H., Skoglund, C., Forsberg, C.
Document(s):
Paper
Poster
Abstract:
Sulphate containing additives, such as ammonium sulphate (AS), are used for sulphation of KCl during biomass combustion. Another aspect with injection of AS is that a significant NOx reduction is achieved but it may also have an impact on other flue gas components. Operating parameters such as the air excess ratio and the presence of combustibles could also have an effect on the flue gas chemistry involving NO and KCl. This paper is based on results obtained from a measurement campaign during combustion of demolition wood in a 63 MWth Bubbling Fluidised Bed (BFB) boiler. Ammonium sulphate was injected for simultaneous reduction of NO and KCl at two positions in the boiler i.e. in the upper part of the combustion chamber and in the empty pass. The impact of AS on the flue gas chemistry was investigated at different operating conditions. Several measurement tools including, IACM (on-line measurements of gaseous alkali chlorides) and gas analysis were applied. The position for injection of AS as well as the operating parameters had a great impact on the flue gas chemistry for NO and KCl.
Keywords:
biomass, combustion, IACM, KCl, SNCR, ammonium sulphate
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Biomass combustion in large utilities
Event:
24th European Biomass Conference and Exhibition
Session:
2BV.1.60
Pages:
782 - 787
ISBN:
978-88-89407-165
Paper DOI:
10.5071/24thEUBCE2016-2BV.1.60
Price:
FREE
