INSTALLATION AND PROCESS FOR THE PRODUCTION OF HOT AIR

摘要

INSTALLATION AND PROCESS FOR THE PRODUCTION OF HOT AIR The treatment of air, particularly raising air to a high temperature and pressure for subsequent injection into a shaft furnace, is accomplished in a manner which will enhance the reliability and service life of the heat exchanger apparatus (10) through which the air is passed. The heat exchanger apparatus (10) includes one or more burners (22) arranged so as to directly heat only the upper surfaces of a refractory brick checkerwork (12) which defines a shaft through which the air to be heated rises. The heat exchanger may be divided into a lower chamber including the checkerwork (12) and a hermetically sealed and cooled upper chamber defined by a partition (14) which supports the burners (22). The burners (22) and a refractory lining (16) on the supporting mechanism therefor define combustion zones from which heat is radiated in a conical pattern and-the geometry of the apparatus is such that the conical patterns irradiate the upper surface of the checkerwork (12) without direct irradiation of walls (14) of the heat exchanger apparatus which extend above the checkerwork (12).