Air heater for a drying tower and drying tower for drying a product to be dried

Abstract

An air heater is used for a drying tower, wherein the air heater includes a combustion chamber, a burner, an air heating chamber, a process air access, a process air exit and/or a flue gas exit. During operation of the air heater, a process air is supplied to the air heating chamber by way of the process air access, a fuel is burned by means of the burner, a heat thus generated in the combustion chamber is transferred to the process air in the air heating chamber and the heated process air is discharged out of the air heater by way of the process air exit, and the air heater comprises an expendable combustion chamber, wherein the expendable combustion chamber is disposed within the combustion chamber. Further, a drying tower is used for drying a product to be dried with an air heater.

Dependencies are inferred from the claim text.