RECUPERATOR Russian patent published in 1999 - IPC

FIELD: heating blast air in furnace units. SUBSTANCE: recuperator has tubes secured in inlet header on one side and in outlet header on other side. Inlets of heat-exchange tubes are provided with swirlers. Inlet header is divided into two chambers; each chamber is provided with air supply branch pipe. One chamber is used for housing the swirlers. Cavity of second chamber is connected with inner cavity of swirlers by means of cylindrical branch pipes. Swirl fitted in one of chambers provides for control of intensity of swirl of air flow in tubes. EFFECT: control of heat transfer coefficient. 1 dwg