Dual scraped surface heat exchanger

Details Dual scraped surface heat exchanger Dual scraped surface heat exchanger

1977-03-10

1978-11-21

Lazarus, Ira S.

Heat exchange

Movable heating or cooling surface

Rotary drum

165 94, 165109, 165120, 165169, F28D 1102

Patent

active

041261771

ABSTRACT:
A heat exchanger for rapidly heating or cooling materials such as fluids containing fragile, discrete particles of varying sizes without substantial damage to the particles. The exchanger has inner and outer heat transfer surfaces that define an elongated annulus. Located in the annulus is a pair of opposed, spiral, inner and outer ribs which do not span the annulus and which, upon rotation, move the material toward the exchanger inlet against the flow therefrom which overflows the ribs and moves from rib to rib and to the outlet. Scraper blades associated with the ribs, scrape the exchanger inner and outer surfaces.

REFERENCES:
patent: 3216042 (1965-11-01), Strittmatter
patent: 3405760 (1968-10-01), Smith
patent: 3476522 (1969-11-01), Stovall
patent: 3587729 (1971-06-01), Eisenmann
patent: 3603103 (1971-09-01), Richmond et al.
patent: 3628602 (1971-12-01), Brunner
patent: 3641783 (1972-02-01), Werner
patent: 3731339 (1973-05-01), Addison
patent: 3805406 (1974-04-01), Castonoli

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