Dorr-oliver Incorporated

Richard E Svencer

Walfred Wilhelm Jukkola

Andrew Beaumont Steever

Systems for the comminution, drying and dry feed of coal for combustion in fluid bed calciners, incinerators, or other combustion systems.

Dry coal feed systems for combustion reactors

Porous, moisture-containing materials are dried in a fluidized bed reactor. The moisture content of both the underflow and carryover products from the dryer are controlled by introducing hot gases into the freeboard region above the fluidized bed. One or more tuyeres of extended length with ports at a level above the fluidized bed in the freeboard regin may be employed to admit hot gases directly into the freeboard region from the reactor windbox without traversing the fluidized bed. Alternatively, a valved conduit may be employed extending through the refractory dome or gas distributor to regulate gas flow between the windbox and the freeboard region.

Fluidized bed drying process for porous materials

A refractory constriction dome for a fluidized bed reactor is constructed to resist the upward thrust of pressure in the windbox as well as the weight of the fluidized bed. A reverse arch of refractory brick or tiles, forming the upper surface of the dome, is the structural feature which functions to resist upward thrust.

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Norwalk, CT, United States of America

Richard E Svencer