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The invention includes a particle feeder for feeding particles at desired uniform feed rate in which the particles can be coal particles or biomass particles.
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Overview A particle feeder is provided for feeding small particles at a uniform low feed rate. In some embodiments, the particle feeder includes a primary reservoir, a secondary reervoir, and a valve. The primary reservoir encloses an internal volume for holding particles and defining a hole through a bottom surface thereof. the valve includes a rod enclosed within and extending through the volume defined by the primary reservoir. The rod is movable between an open position, wherein particles can flow through the hole. The actuator controls the movement of the rod blocks the hole. The actuator controls the movement of the rod between the open and close position. The secondary reservoir has an internal volume, and a conduit for connecting the internal volume of the secondary reservois with the internal volume of primary reservoir, such that particles can flow from the secondary reservoir into the primary reservoir.