EJECTOR APPARATUS OF FLUIDIZED BED HEAT-TREATING FURNACE.

摘要

Ejector appts. for a fluidised bed heat-treating furnace for heat-treatment of a work A put into a fluidised bed (2) by circulating an exhaust gas at the upper layer portion of a retort (1) driven by a compressed gas and enclosing therein the fluidised bed (2) from the bottom of the retort (1) to its inside to fluidise the fluidised bed. The main body of the ejector consists of at least three members and at least two systems of compressed gases are supplied to contracting portions from compressed gas inlets defined between the ejector members through gaps formed between the ejector members. The gap of each ejector member can be adjusted. The absorption efficiency of the ejector can be freely adjusted over a wide range.