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Low-Turbulence/High-Efficiency Cyclone Separator Program: Final Report

机译：低湍流/高效旋风分离器计划：最终报告

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Cyclone separators have been proposed to handle the hot gas cleanup requirements for pressurized fluidized bed combustion (PFBC) power plants. In this application, cyclones have an advantage over electrostatic precipitators and ceramic filters because cyclones are relatively simple, robust, and low cost devices. Theoretically, the centrifugal force field generated inside an industrial-sized cyclone should be sufficient to meet the particle collection requirements for PFBC power plants. However, in practice this is not the case because particle reentrainment, caused by wall-generated fluid turbulence, limits the particle collection efficiency of cyclones to values much less than the theoretical maximum. A cyclonic wind tunnel has been used to screen five turbulence suppression concepts in order to judge their effectiveness at reducing particle reentrainment and increasing the particle separation potential of cyclonic flow field. The turbulence suppression concepts studied were a smooth rotating wall, a porous rotating wall with suction, a grooved rotating wall, an acoustic field-based concept, and an electrostatic field-based concept. Of these turbulence suppression concepts, the smooth rotating wall was judged to have the most potential for improving the collection efficiency, and it was the concept chosen for proof-of-principle tests in an industrial-sized cyclone separator. Using our Baseline Cyclone Facility, Battelle has successfully demonstrated a low-turbulence, high-efficiency cyclone design that has the potential to meet the hot gas cleanup requirements for PFBC power plants. The newly-developed cyclone incorporates a cyclone body that rotates in the same direction as the fluid motion. Much of the wall-generated turbulence, which causes particle reentrainment, can be eliminated by making the cyclone wall follow the fluid streamlines as closely as possible. 30 refs., 68 figs., 7 tabs. (ERA citation 12:030468)

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