Pneumatic particulate transport with gravity assisted flow

Details Pneumatic particulate transport with gravity assisted flow Pneumatic particulate transport with gravity assisted flow

1995-05-03

1996-12-17

Pike, Andrew C.

Conveyors: fluid current

Intake to fluid current conveyor

Combined intake and discharge

406174, B65G 5310

Patent

active

055846157

ABSTRACT:
A system for transporting particulate material uses a combination of nonmechanical valves and pneumatic and gravity transport to reduce breakage of particulate material. This system is particularly useful for the conveyance of catalyst particles where a lift conduit raises the particles from a low elevation to a relatively higher elevation. A particular advantage of the arrangement is the elimination of pneumatic conveyance through elbows to reduce pressure drop and eliminate churning of catalyst particles. The elbows are replaced with an impactless flow diverter that uses gravity assisted conveyance to eliminate or minimize the attrition resulting from pneumatic conveyance.

REFERENCES:
patent: 2568379 (1951-09-01), Berg
patent: 3647680 (1972-03-01), Greenwood et al.
patent: 3652231 (1972-03-01), Greenwood et al.
patent: 4202673 (1980-05-01), Knowlton
patent: 4576712 (1986-05-01), Greenwood
patent: 4872969 (1989-10-01), Sechrist
"L-valve characterized for solid flow" by T. M. Knowlton et al., Hydrocarbon Processing, pp. 149-156 (Mar. 1978).

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