Recuperative heating unit for industrial furnace

Heating – Work chamber having heating means – Heating tube – element – or flue traverses work space

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126 91A, 431215, F27B 514

Patent

active

043068588

ABSTRACT:
A burner housing lodged in a furnace wall comprises a nest of coaxial tubes including an inner gas-supply tube terminating in a burner head, an intermediate air-supply tube extending past that head to form a combustion chamber, and an outer tube defining with the intermediate tube a return duct for combustion gases. The metallic intermediate tube is provided with thermally conductive vanes facilitating the preheating of the entering combustion air by the high-temperature exhaust gases whose residual heat is then utilized to preheat the incoming fuel gas in a heat exchanger laterally connected with the outer tube. An ancillary burner at the opposite end of the inner tube directs a pilot flame toward the burner head.

REFERENCES:
patent: 3163202 (1964-12-01), Schmidt et al.
patent: 3920383 (1975-11-01), Kerr
patent: 4038022 (1977-07-01), Blackman
patent: 4140482 (1979-02-01), Simon
Pages 153 and 388 from Becher Handbuch der Gasanwendung (Handbook of Gas Use), VEB Verlag Technik Berlin, 1953.

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