In-furnace Temperature and Heat Flux Mapping in a Kraft Recovery Boiler, 2010 TAPPI/PAPTAC International Chemical Recovery Conference

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Gas temperatures, incident heat flux and surface temperatures where measured in a large Kraft recovery boiler. The measurements were a part of an extensive campaign planned and carried out to support validation of models based on Computational Fluid Dynamics. The gas temperatures were measured with three different techniques, i.e., with IR-pyrometer, with suction pyrometer, and with unshielded thermocouples. In addition to the temperature measurements, the radiative heat flux was measured in a number of locations in the boiler using a portable heat flux probe and the surface temperatures inside the boiler were measured using a portable single band IR-camera.