Heat exchanger for oxygen

摘要

The exchanger has a chamber (1) surrounding tubes (2) that are fixed inside the enclosure by plates (3, 4). Oxygen circulates in the tubes, whose external walls are in contact with a heat transfer gas e.g. air. Temperature of the oxygen at an outlet of the exchanger is not less than 300 degree Celsius and above 400 degree Celsius. The oxygen or the oxygen-rich gas feeds burners of a furnace, and the heat of the combustion gases is used directly or indirectly to heat the oxygen in the exchanger, where exchange power is between 40 and 250 kilowatts and preferably between 80 and 170 kilowatts.