Combustion

Flue Gas Emissions from Fluidized Bed Combustion

“…-Influence of fly ash recycling Recycling of fly ash is a relatively simple measure to increase the combustion efficiency especially for less reactive coal types [2]. Attendant benefits of fly ash recycling are a better sulphur retention and lower emissions of NO x .…”

“…The present standards for S0 2 and NO x in the Netherlands are given in table 1. To meet the present and future standards, a comprehensive research project was executed at the Twente University and at TNO Organisation for Applied Scientific Research on different subjects of emission reduction in fluidized beds for coal combustion, the results of which are reported in this chapter.…”

95/05314 Flue gas emissions from fluidized bed combustion

“…Recycling of fly ash is a relatively simple measure to increase the combustion efficiency especially for less reactive coal types [2]. Attendant benefits of fly ash recycling are a better sulphur retention and lower emissions of NO x .…”

“…The carbon monoxide emission is increased from about 200 without recycling to 400 mg/nm 3 with recycling of fly ash. The recycled fly ash burns mainly in the freeboard of the combustor [2], this freeboard combustion produces additional carbon monoxide which is not completely converted to carbon dioxide. At higher recycle ratios the freeboard temperature increases resulting in lower carbon monoxide emissions.…”

“…The research work concerning the combustion characteristics of coal and the emissions in the TNO 4 MW th AFBB is reported by Bijvoet [1] The results presented here are from research work done in the 1 MW^ fluidized bed combustor at the Twente University and the 4 MW th fluidized bed combustor at TNO. The two installations are described by Valk [2].…”