Reduced NO(x) emissions and other phenomena in fluidized bed combustion
Future emission standards will require levels of NO(x) emission that are below the relatively low levels produced by conventional fluidised bed combustion (FBC). One of the most promising methods for meeting these requirements is staged combustion. The Solids Circulation Boiler (SCB) separates the combustion and heat transfer processes, with the result that no in-bed tubing is required. The air used to circulate solids between the bed and a cooled riser/downcomer system is re-introduced to the furnace in the lower freeboard. Thus the process incorporates the staged admission of combustion air and, potentially, is capable of low NO(x) emission levels. Consequently, the main aim of this project was to investigate the conditions required to reduce NO(x) emissions on a SCB rig, whilst maintaining a low level of CO emission, good sulphur retention and a satisfactory combustion efficiency. In addition, other FBC phenomena were investigated, such as pressure pulsation and residue characteristics.
Bibliographic Reference: EUR 13876 EN (1992) 66 pp., FS, ECU 6.25
ISBN: ISBN 92-826-3366-7
Record Number: 199210336 / Last updated on: 1994-12-02
Original language: en
Available languages: en