Process for cooling and purifying hot, dust-laden flue gases con

Details Process for cooling and purifying hot, dust-laden flue gases con Process for cooling and purifying hot, dust-laden flue gases con

1993-06-25

1995-05-09

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Process control responsive to sensed condition

75414, 75581, 75584, 75961, 75 1036, C22B 920

Patent

active

054136210

ABSTRACT:
The present invention pertains to a process for cooling and purifying hot, dust-laden flue gases enriched with dioxins and other toxic components from a melting vessel, e.g., an arc furnace.
Both the flue gases A, B generated during charging and those generated during the melting operation are collected, and the toxic components are removed in two ways.
The flue gases A collected in the exhaust hoods 2 are fed into the filter 6, while previously blowing an additive 12, on which the toxic components settle before reaching the filter bags, into the flue gas stream A.
The hot flue gases B drawn off directly from the arc furnace 1 are introduced into a combustion chamber 3 after passing through a water-cooled section 4, and are subjected to afterburning in the combustion chamber 3 to remove the toxic pollutants. These gases are then intermediately cooled in a second, water-cooled section 5, further cooled by adding more additional cold air A, and fed into the filter 7.
The contaminated dust E is charged again into the arc furnace 1.

REFERENCES:
patent: 5167699 (1992-12-01), Pirklbauer et al.
G. Broker VDI-Berichte, Nos. 634 1987, pp. 515-539.

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