Classifier

摘要

A classifier including a housing, a body, a vane assembly, and an outlet. The housing extends along a longitudinal axis between opposing first and second ends, and includes a lower portion provided at the first end and including an inlet, an upper portion provided at the second end and including a reclaim outlet, and an intermediate portion provided between the upper and lower portions. The body is disposed within the housing that defines a chamber therebetween. The vane assembly includes a plurality of blades and is provided between an outer surface of the body and an inner surface of the intermediate portion dividing the chamber into first and second chambers. The outlet is provided at the second end and is fluidly connected to the second chamber to allow fine particles separated from coarse particles to flow through the outlet. The reclaim outlet is fluidly connected with the second chamber and a pulverizer to allow coarse particles separated from the fluid flow to be directed back to the pulverizer.

主权项

1. A classifier for separating fine and coarse particles in a fluid flow, comprising:
a housing extending along a longitudinal axis between a first end and an opposing second end, the housing including:
a lower portion provided at the first end and including an inlet for receiving the fluid flow;an upper portion provided at the second end and including a reclaim outlet; andan intermediate portion provided between the upper and lower portions; a body disposed within the housing that defines a chamber between the body and the housing; a vane assembly provided between an outer surface of the body and an inner surface of the intermediate portion of the housing, such that the vane assembly divides the chamber into a first chamber provided between the body and the lower portion and a second chamber provided between the body and the upper portion, wherein the vane assembly includes a plurality of blades aligned at a pitch angle relative to an entrance end of the vane assembly; and an outlet provided at the second end and fluidly connected to the second chamber to allow the fine particles separated from the coarse particles to flow through the outlet after exiting the vane assembly; wherein the reclaim outlet is fluidly connected with the second chamber and a pulverizer to allow the coarse particles separated from the fluid flow after exiting the vane assembly to be directed back to the pulverizer for regrinding; wherein the body includes opposing upper and lower frusto-conical portions; and wherein the lower fusto-conical portion is provided adjacent to the intermediate portion of the housing with the vane assembly therebetween, such that a spacing between the lower frusto-conical portion and the intermediate portion narrows from the entrance end of the vane assembly to an exit end of the vane assembly.