US 4,826,429 AGranted

Apparatus for uniformly cooling pyroprocessed particulate material

AssigneeKennedy Van Saun Corporation

InventorLee H. Niems

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Abstract

Apparatus for cooling a bed of pyroprocessed particulate material such as lime received from a source such as a kiln, the cooler including a shaft with one or more underlying hoppers through which the material flows as cooling air is forced upwardly therethrough. The invention embodies hoppers with uniform slopes at any given elevation, dual hopper slopes with one being extremely steep, internal flow guiding means, as well as an octagonal or partially octagonal wall configuration and matching scalloped octagonal hoppers. Also included is the concept of providing substantially equal areas of draw in any angular segment about the vertical center line of discharge from a hopper or cluster of hoppers. The resultant is more uniform flow of material down through the cooler and correspondingly more efficient cooling. Alternative embodiments include hopper transition pieces in lieu of the cooling shaft being constructed in an octagonal or partially octagonal configuration.

Claims10

Dependent claims

Apparatus for cooling hot particulate material comprising in combination a kiln from which such hot particulate material is supplied,

a cooling shaft positioned in association with said kiln for continuous receipt and containment of a bed of such hot particulate material,
a hopper underlying said cooling shaft for flow therethrough of particulate material of said bed to a lower discharge outlet of the hopper,
said hopper comprising a circular upper uniformly sloped steep wall section and an associated circular lower uniformly sloped shallower wall section leading to said outlet,
flow guiding means centrally located in a position in a range extending from within said upper steep wall section and immediately above forming an annular passageway to cause said material to flow adjacent the wall of said steep wall section upon passage to said shallower section and
air supply means for supplying cooling air under pressure to said hopper to force said air upwardly in said bed in sufficient amount to cool said particles to an acceptable handling temperature upon discharge from said outlet.

2 more elements

Dependencies are inferred from the claim text.