METHOD OF OPERATING ROTATING REGENERATIVE HEAT EXCHANGER

摘要

A method of operating a rotating regenerative heat exchanger capable of preventing the excessive contact of a rotatingly sliding part even when a furnace temperature varies largely, comprising the steps of providing an exhaust gas cooling means in the rotating regenerative heat exchanger (10) for recovering the exhaust heat of the exhaust gas from a furnace such as a billet heating furnace, a billet heat treatment furnace, and an ingot soaking pit, and operating the exhaust gas cooling means when the furnace temperature varies, whereby an abrupt change in the exhaust gas temperature on an exhaust gas inlet side can be prevented, a dilution damper (14) installed on the exhaust gas inlet side or an outside air sucking damper (18) installed on an exhaust gas outlet side being desirable as the exhaust gas cooling means, and the exhaust gas temperature on the exhaust gas inlet side being desirable to be suppressed to 150 DEG /Hr or below.