Device and process for heat transfer
AssigneeAndritz Technology and Asset Management GmbH
InventorsKlaus Stanke, Mathias von Lewinski, Paul Kröhl
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Abstract
A device for heat transfer, particularly in fluidized bed equipment. Several layers of heat exchanger tubes are provided, with radial arms mounted in between to mix and loosen the product. In addition, a process is disclosed for heat transfer in high-temperature processes for bulk material, particularly granulates or powders, in fluidized bed units, where the heat is transferred to and absorbed by the fluidized bed on several levels, and by the fluidized bulk material being agitated mechanically between these levels. This allows transfer of high energy densities without the risk of bridging or local overheating.
Claims6
A fluidized bed reaction vessel having a vertical longitudinal axis and a flow cross section, for heat transfer processing flowable bulk material introduced at an inlet of the vessel, which material flows longitudinally through the vessel over heat exchanger tubes containing a heat transfer medium and is withdrawn as a processed product from an outlet of the vessel, the improvement comprising a plurality of axially spaced apart layers of heat exchanger tubes in said flow cross section and a plurality of radially extending arms mounted between the layers of heat exchanger tubes in said flow cross section, wherein the heat exchanger tubes are rotatable about the longitudinal axis while the arms remain stationary and whereby material flowing through the vessel in the spaces between heat exchanger tubes is loosened and mixed as it passes over the arms.
Dependencies are inferred from the claim text.