 The IFRF provides an aerodynamically
air-staged burner (AASB) for testing NOx reduction strategies in pulverized coal flames.
Performance characteristics of the AASB fired at scales ranging from 1-12 MW, have been
studied in detail in an extensive scaling program conducted by the IFRF. The effect of
coal blends fired in the AASB has also been evaluated.
The AASB is generally scaled
using either constant velocity or constant residence-time scaling criteria.
The AASB is specifically designed
to utilize a swirling combustion air stream which undergoes a defined flow transition
(vortex breakdown) within the burner quart. The vortex breakdown can result in the
formation of an internal recirculation zone, which stabilizes the flame on the quarl.
The characteristics of the internal
recirculation zone are critically influenced by swirl generator type, swirl level and
burner geometry. Optimizing the interaction between the coal jet and the internal
recirculation zone forms the basis for the design strategy of the AASB. The combustion air
is typically swirled using an IFRF
moveable block swirl generator.
VENDOR: IFRF Research Station b.v.
Would you be interested in:
- getting more information about
the AASB?
Please contact us:
IFRF Research Station B.V.
P.O. Box 10 000
1970 CA IJmuiden
The Netherlands
email: sales@ifrf.net
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