A FLUE GAS AIR PREHEATER AND A METHOD FOR INSTALLATION AS WELL AS AN AIR PIPE COMPONENT FOR A FLUE GAS AIR PREHEATER

摘要

A flue gas air preheater and a method for the installation of air pipes for a flue gas air preheater (3) wherein a set of air pipes (7) is connected to said preheater the method comprising: cutting an air pipe (7) connected to the preheater and detaching the portion of the air pipe (7) that is to be removed from the preheater for replacement; fitting a separate new air pipe (7a) in place of the air pipe portion to be removed; and connecting said new air pipe (7a) to the remaining portion (7b) of the air pipe (7) in a sealed manner as an extension of it. In an example the fixing is performed utilizing a fastening sleeve (13) fixed to the end of the new air pipe (7a) and inserting it in the remaining portion (7b) of the air pipe (7). In an example the fixing is performed by means of a mechanical sealing solution (13d 13f) without welding. The air pipe component for the flue gas air preheater (3) comprises: an air pipe (7a) and a fastening sleeve (13).