Heat exchanger for pre-heating intake air for rotary dryer

Details Heat exchanger for pre-heating intake air for rotary dryer Heat exchanger for pre-heating intake air for rotary dryer

1980-01-02

1981-07-21

Camby, John J.

Heating

Tumbler-type rotary - drum furnace

Having combustion products generated in or fed to drum

432107, 432219, 432223, F27B 736, F24H 100

Patent

active

042795923

ABSTRACT:
A pre-heating chamber of transversely arcuate shape adapted to be mounted above a longitudinal portion of a rotary dryer chamber adjacent the combustion chamber of a drying apparatus for drying aggregate, such as used in the manufacture of asphalt paving composition, in which ambient air is circulated through the pre-heating chamber and then discharged through a duct means to the air intake of the combustion chamber.
The pre-heating chamber is preferably divided into a radially outer air intake passage communicating at one end with a radially inner air discharge passage to provide a more effective heat transfer between the pre-heating chamber and the rotary dryer chamber.

REFERENCES:
patent: 1381026 (1921-06-01), Snyder
patent: 1836139 (1931-12-01), Trumble
patent: 4191530 (1980-03-01), Bearce

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