Device for the acoustic damping of a radiant-heating tube for an

Details Device for the acoustic damping of a radiant-heating tube for an Device for the acoustic damping of a radiant-heating tube for an

1977-07-01

1979-02-20

Camby, John J.

Heating

Work chamber having heating means

Heating tube, element, or flue traverses work space

126 91A, 432214, F27B 514

Patent

active

041404823

ABSTRACT:
A fuel-fired radiant-heating tube for an industrial furnace is provided, at its fuel-feed end externally of the furnace, with an acoustic damper or muffler which comprises a double-wall housing defining two elongated annular flow passages in indirect heat-exchanging relationship through a thermally conductive inner wall. The combustion exhaust gases are conducted through one of these passages while combustion-sustaining gas, e.g. air, is supplied through the other in counterflow to the exhaust gas, thereby preheating the air. The outer wall is provided with acoustic and/or thermal insulation while at least one of the passages is provided with sound-damping elements, e.g. vanes for baffling the flow through this passage.

REFERENCES:
patent: 2226816 (1940-12-01), Hepburn
patent: 2255540 (1941-09-01), Dreffein
patent: 4047881 (1977-09-01), Eschenauer et al.

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