Multi-section heat exchanger means

Details Multi-section heat exchanger means Multi-section heat exchanger means

1975-09-10

1977-07-12

Dority, Jr., Carroll B.

Liquid heaters and vaporizers

Water tube

Zigzag

165145, F22B 2124, F28F 922

Patent

active

040347176

ABSTRACT:
An improved multi-section heat exchanger unit for use in combination with a radiant furnace unit or direct fired heaters which comprises a first heat exchange section having a plurality of bare heat exchange pipes positioned therein and in fluid communication with a first heat exchange fluid inlet and a first heat exchange fluid outlet to provide fluid flow through the bare pipes; and a second heat exchange section having a plurality of extended surface heat exchange tubes positioned therein in fluid communication with a second heat exchange fluid inlet being in fluid communication with the outlet of the first heat exchange section, the second heat exchange section being further characterized as having a gradually reduced internal cross section towards its upper portion so that the velocity of gas flow therethrough is maintained substantially constant.
In one embodiment a third heat exchange section having a plurality of extended surface heat exchange tubes positioned therein is provided wherein the tubes are in fluid communication with the tubes of the first and second heat exchange sections.

REFERENCES:
patent: 2121537 (1938-06-01), Coghill
patent: 2254900 (1941-09-01), Lessman
patent: 2514535 (1950-07-01), Breukel
patent: 2617372 (1952-11-01), O'Connor
patent: 3713424 (1973-01-01), Welz

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