CATALYST PACK SUPPORT IN AMMONIA OXIDATION BURNER

摘要

The present invention relates to a catalyst pack support structure in an ammonia oxidation burner which comprises a catalyst pack (2), a catchment pack (3) and possibly a support screen (4) being supported by a structure placed in a basket or similar means secured to the burner structure. The support structure (11) consists of a porous, inert refractory material cast into at least one rigid segment (11a-h) assembled into at least one layer and/or fibre mats. Said support structure is substantially dimension stable during operation of the burner and has an even and average porosity of 60-90 %. The segments (11a-h) may be interlocked by means of grooves (13) and tongues (12) in each segment.