High-temperature fluid transporting pipeline with pipeline casing formed by heat exchange apparatus, suitable heat exchange apparatus and heat exchange method

Abstract

The present invention discloses a high-temperature fluid transporting pipeline integrating a heat exchange apparatus, wherein heat contained in a high-temperature fluid can be recovered during the transportation thereof. The heat exchange apparatus comprises a hermetic heat exchange cavity, and a heat-receiving fluid coil installed therein. The method of heat exchange is that the high-temperature fluid heats an auxiliary fluid in the cavity via a heat exchange base plate of the heat exchange cavity in contact therewith, and the heated auxiliary fluid then conducts the heat to a heat-receiving fluid in the heat-receiving fluid coil. As an example, the high-temperature fluid is flue gas generated by combustion, an upper part of a flue gas transporting pipeline is replaced by the heat exchange apparatus of the present invention, the auxiliary fluid is an inert gas such as air, and the air heated indirectly by the high-temperature flue gas conducts heat to fuel and/or oxygen-enriched gas flowing in the heat-receiving fluid coil (as an oxidant/combustion aid).

Dependencies are inferred from the claim text.