Method of and apparatus for pumping particulate solids

Details Method of and apparatus for pumping particulate solids Method of and apparatus for pumping particulate solids

1991-07-16

1993-06-29

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Utilizing centrifugal force

198617, 264109, 264349, 406 99, 406197, 415 90, B29C 6700

Patent

active

052231992

ABSTRACT:
A method of pumping particulate solids that have an initial bulk density which is lower than its structural density; the method comprises providing a flow channel (12) having an inlet (120) and an outlet (129) and including (i) an annular drag flow channel segment (L1) formed between a stationary outer wall member (14) and a rotating circular inner wall member (16); and (ii) a straight channel segment (L2) formed between a first planar and stationary wall portion (148) and a second planar and stationary wall portion (182); the inlet (120) of rotary channel (12) is that of the drag flow channel segment (L1) while the outlet (129) of flow channel (12) is that of the straigth channel segment (L2); no axial cross-section of the flow channel (12) between the inlet (120) and the outlet (129) is smaller than the axial cross-section of the inlet (120); the particulate solid is passed through the flow channel (12) so as to increase the initial bulk density and avoiding significant melting and/or thermal degradation of the particulate solid while in the flow channel (12).

REFERENCES:
patent: 3884855 (1975-05-01), Baumann et al.
patent: 4102109 (1978-07-01), Modra et al.
patent: 4142805 (1979-03-01), Tadmor
patent: 4213709 (1980-07-01), Valsamis
patent: 4421412 (1983-12-01), Hold et al.
patent: 4516674 (1985-05-01), Firth
patent: 5051041 (1991-09-01), Firth
European Search Report dated Oct. 23, 1991.

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