Systems and methods for reducing dust in granular material
AssigneeMEMC Electronic Materials, Inc.
InventorsSeok-Min Yun, Seong-Su Park, Se-Myung Kim, Won-Jin Choi, Woo-Jin Yoon
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Abstract
A method of removing dust from granular polysilicon includes introducing a stream of granular polysilicon, dispersing the longitudinal stream of granular polysilicon by redirecting the stream into a radially outward flow having a circular pattern, and introducing a counter flow of gas in an opposite direction to that of the longitudinal stream of granular polysilicon to contact the radially outward flow to separate the dust from the granular polysilicon.
Claims18
A method of removing dust from granular polysilicon, the method comprising:
- introducing a stream of granular polysilicon into a canister from an inlet positioned opposite a disperser;
- dispersing the stream of granular polysilicon by redirecting the stream into a radially outward flow by the disperser;
- introducing a counter flow of gas in an opposite direction to that of the stream of granular polysilicon to contact the radially outward flow to separate the dust from the granular polysilicon.
A system for removing dust from granular polysilicon, the system comprising:
- a canister having at least one wall defining an interior of the canister and an interior cross-sectional area;
- an inlet connected with the canister for the introduction of granular polysilicon into the canister, the inlet having an inlet cross-sectional area, the interior cross-sectional area of the canister being substantially larger than the inlet cross-sectional area of the inlet;
- a disperser located within the canister at a position opposite the inlet to disperse granular polysilicon introduced through the inlet radially outward toward the at least one wall of the canister.
Dependencies are inferred from the claim text.