Rotatable throat assembly for coal pulverizer

摘要

A rotatable throat assembly for a coal pulverizer which includes a plurality of throat segments secured to a ring seat in the pulverizer, a plurality of ledge cover segments on the throat segments, and a plurality of air seal segments secured on top of the ledge cover segments wherein the air seal segments each includes a layer of flexible, durable, high temperature-resistant polymer/rubber material projecting to within close proximity to the inner wall of the pulverizer to substantially block air flow between the rotatable throat assembly and the inner wall of the pulverizer.

主权项

1. In a coal pulverizer of cylindrical shape and vertical central axis and having a cylindrical inner wall and a rotatable ring seat centered in said inner wall, a rotatable throat assembly comprising:
a radially segmented throat ring comprised of a plurality of arcuate throat segments secured to said rotatable ring seat with each of said plurality of throat segments having vertical air channels through it with each of said air channels having a lower inlet opening and an upper outlet opening; and a plurality of arcuate ledge cover segments secured on the top of said throat segments radially outwardly of said outlet openings, said ledge cover segments having air seal segments secured on them projecting radially outwardly from said throat segments toward said inner wall of the pulverizer, and said air seal segments comprising a strip of flexible, high-temperature resistant, rubberized material projecting to within close proximity to said inner wall of the pulverizer to substantially block air flow between said ledge covers and said inner wall.