Obstructing member for a fluidized bed reactor

摘要

Embodiments of an obstructing member and methods for its use in a fluidized bed reactor are disclosed. The obstructing member comprises a plurality of receiving members, each receiving member comprising a tubular wall defining a passageway dimensioned to receive an internal reactor component, and a plurality of connecting elements connecting the receiving members, wherein the obstructing member occupies from 15-60% of a horizontal cross-section of a reaction chamber of the fluidized bed reactor.

主权项

1. A reactor for producing silicon-coated granular material by thermal decomposition of a gas containing silicon, the reactor comprising:
a vessel defining a chamber to contain a fluidized bed of particles and a freeboard region above the fluidized bed; a plurality of particles within the chamber, wherein the particles are seed particles, silicon-coated seed particles, or a combination thereof; an inlet positioned for delivering a silicon-bearing gas into the chamber to flow upwardly through the particles; an inlet positioned for delivering a fluidizing gas into the chamber to flow upwardly through the particles to form a fluidized bed of particles; an outlet for venting exhaust gas from the chamber; a top head; one or more internal reactor components extending downwardly from the top head and into the chamber, the internal reactor components comprising a seed nozzle, a thermocouple, a pressure tap, a particle sampling line, a gas sampling line, a gas feed line, a heater, or any combination thereof; and an obstructing member that is positioned within the freeboard region of the chamber, that is secured to at least one of the one or more internal reactor components, and that is configured to break up a rising slug of particles in the chamber, the obstructing member comprising (a) a plurality of receiving members, each receiving member comprising a tubular wall defining a passageway dimensioned to receive an internal reactor component extending downwardly from the top head, and (b) a plurality of connecting elements connecting the receiving members, wherein the perimeter of the obstructing member defined by the connecting elements and receiving members, as viewed vertically from the top, defines an area that is from 15-60% of a horizontal cross-sectional area of the region of the chamber that contains the obstructing member, and wherein one of the plurality of connecting elements has an outer surface that is coincident with a vertical central axis of the chamber and extends radially from the vertical central axis along a plane that includes the central axis.