Furnace exhaust duct

Details Furnace exhaust duct Furnace exhaust duct

1975-03-24

1977-01-04

Lake, Roy

Metallurgical apparatus

With means treating or handling gases exhausted by treating...

By contacting gas with nonmetallic liquid

266158, 122 7A, C21B 300

Patent

active

040008860

ABSTRACT:
An exhaust duct for use with a direct evacuation exhaust decontamination system of a blast furnace or steel converter. The exhaust duct includes a main support coolant inlet conduit and a plurality of coolant return conduits arranged in a generally circular pattern to define an exhaust duct having a circular cross section for the evacuation of exhaust gases from a furnace. The inlet conduit and the return cooling conduits are connected to a distribution manifold on one end so that all of the coolant enters the exhaust duct through the main coolant supply conduit and is returned and discharged through the smaller cooling conduits which thereby serve to maintain the exhaust duct at a relatively low temperature to prevent oxidation or destruction of the duct walls by the exhaust gases. The discharged coolant may be directed into the exhaust gases at the end of the exhaust duct for use in a "wet" exhaust cleansing system or collected in a trough or manifold when used with a "dry" exhaust cleansing system. Each cooling conduit includes a flow control device to regulate the amount of coolant flowing therethrough. The furnace exhaust duct is removably mounted over the furnace roof or chimney to facilitate movement of the duct for recharging of the furnace.

REFERENCES:
patent: 3026102 (1962-03-01), McFeathers
patent: 3320931 (1967-05-01), Durham
patent: 3347539 (1969-10-01), Mitchell et al.
patent: 3372917 (1968-03-01), Richardson
patent: 3379426 (1968-05-01), Reuter et al.
Babcock and Wilcox Brochure, 1962, "The New Bond W Oxygen Furnace Hood."
Jet Propulsion for Aerospace Applications, 1964, Second Ed., Hesse, W. J. and Mumford Jr., N. V. S.; Pitman Publishing Corp., p. 492.

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