Fluidized bed heat exchange apparatus

Details Fluidized bed heat exchange apparatus Fluidized bed heat exchange apparatus

1987-07-13

1989-01-10

Davis, Jr., Albert W.

Heat exchange

Intermediate fluent heat exchange material receiving and...

Solid fluent heat exchange material

16510418, 34 57A, F28D 1902, F28D 1300

Patent

active

047966912

ABSTRACT:
A heat exchanger comprises two fluidization chambers separately supplied with fluidization gas. A heat transfer medium in the form of particulate material is supplied to the first chamber which is in communication with the second chamber. The second chamber has an outlet for discharging the heat transfer medium and contains a plurality of heat exchange tubes immersed in the fluidized bed therein. The particles of the heat transfer medium have average dimensions between 50 and 3,000 micrometers, and the maximum speed of the fluidizing gas in the second chamber is between 1.5 times and 10 times the minimum speed of fluidization of the particles of the heat transfer medium. Adjacent heat exchange tubes are arranged to be spaced by a horizontal distance which is between 1.4 times and 2.1 times the external diameter of these tubes. Additionally, the tubes have a vertical spacing between 1.4 and 2.1 times the external diameter of these tubes. By these means efficient heat exchange between the particulate material and a fluid flowed through the tubes is achieved.

REFERENCES:
patent: 3242974 (1966-03-01), Goulounes
patent: 3921590 (1975-11-01), Mitchell et al.
patent: 4343352 (1982-08-01), Bockman et al.
patent: 4449575 (1984-05-01), Laws et al.

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