METHOD FOR CLEANING FURNACE WALL TUBE OF ONCE-THROUGH BOILER

摘要

Provided is a method for cleaning a furnace wall tube (5) of a once-through boiler in a water supply system in which oxygen treatment is applied, wherein the method for cleaning a furnace wall tube (5) of a once-through boiler involves chemical cleaning to selectively remove powder scale (PS), which has lower thermal conductivity than does self-oxidizing scale (HS), the self-oxidizing scale (HS) and powder scale (PS) having been produced on the inner surface of the furnace wall tube (5).