Method for operating a regeneratively heated industrial furnace and regeneratively heated industrial furnace

摘要

The invention relates to a method for operating a regeneratively heated by at least one regenerative heat storage (10) industrial furnace (100) having a furnace chamber (21) of a furnace (20), in particular with a melting tank for glass (20B), wherein the regenerative heat storage (10 ) has an oven-side heat storage gas passage (11, 11 ') to the furnace chamber (21) and an ambient heat storage gas passage (12) to the environment, comprising the steps: - secondary preheating the combustion air and supplying the secondary preheated combustion air (VL) to the regenerative heat storage (10) ; - Primary use of the exhaust gas in the regenerative heat storage (10) for the primary preheating of the combustion air (VL); - Secondary use (30) of the exhaust gas following the ambient heat storage gas passage (12) to the environment. According to the invention, it is provided that the secondary preheating of the combustion air (VL) from a waste heat of the furnace (20) is obtained, and in the operation of the industrial furnace (100) an exhaust gas outlet temperature at the ambient heat storage gas passage (12) is increased compared to an exhaust gas outlet temperature on ambient heat storage gas passage (12) without secondary preheating (40) of the combustion air (VL).