Sector plate and sealing device for an air preheater with three sectors.

摘要

A TRISECTOR AIR PREHEATER INCLUDES SECTOR PLATES (42, 44) BETWEEN THE PRIMARY AIR SECTOR (50) AND THE EXHAUST GAS SECTOR (48) AND BETWEEN THE SECONDARY AIR SECTOR (52) AND THE EXHAUST THAT THEY ARE OF A LARGE SIZE SO THAT THEY SUPPLY DOUBLE RADIAL SEALS. THEREFORE, THE SECTOR PLATE (46) BETWEEN THE PRIMARY (50) AND SECONDARY (52) AIR SECTORS IS SMALL AND PROVIDES ONLY A SIMPLE RADIAL SEAL. THE SMALLER SECTOR PLATE (46) REDUCES PRESSURE DROP THROUGH THE AIR PREHEATER WHILE SACRIFYING INCREASED LOSSES ONLY BETWEEN AIR SECTORS. AXIAL SEAL BETWEEN THE PRIMARY AND SECONDARY SECTORS MAY BE KEPT IN A DOUBLE SEAL SIZE.