AIR HEATING APPARATUS

摘要

AIR HEATING APPARATUS An apparatus is provided for generating heated air, for example, for use in connection with a dryer for particulate material, comprising a base portion having a combustion chamber and a burner for providing a flow of combustion gas. A plurality of open tubes having the first ends communicating with the combustion chamber are provided for receiving the flow of combustion gas. The second ends of the tube extend beyond the base portion. A tubular structure is connected to the base portion surrounding the second ends of the tubes. The tubular structure has partition means for dividing it into a heat exchange chamber adjacent the base portion and surrounding the tubes and a manifold chamber remote from the base portion. The partition cooperates with the tubes to direct the flow of combustion gas into the manifold chamber. Air inlets are provided in one of the chambers and an air exhaust communicates with the heat exchange chamber for having ambient air flow into the air inlet and through the heat exchange chamber to provide a flow of heated air.