WATER PIPE PROTECTING REFRACTORY STRUCTURE

摘要

A boiler water pipe protecting refractory structure comprising a refractory interposed between a boiler water pipe and a combustion gas is provided as a refractory structure capable of reducing thermal stress without increasing the wall thickness of refractory blocks, and improving the durability of mounting members by preventing the occurrence of high-temperature corrosion thereof, and having a high heat transfer efficiency. The characteristics of this structure reside in that the structure is provided with a refractory block (16) which has an arcuate portion (16a) and a connecting portion (16b) engaged at inner circumferences thereof with the boiler water pipe (11), and a locking recess (17, 58, 68) and locking projection (18, 59, 69) formed on the boiler water pipe (11) respectively as fixing means for detachably engaging the refractory block and boiler water pipe with each other.