US 4,961,722 AGranted

Conical screen for a vertical centrifugal separator

AssigneeGuyan Machinery Co.

InventorsJimmy Taylor, David L. Singleton, Stanley A. Skeens, Dennis R. Runyon

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Abstract

A vertical centrifugal separator, for example of the type used to dry coal, is improved by splitting the frustoconical screen into two pieces and including access doors in the water shield surrounding the screen. The division of the screen is made horizontally, for example at a level of about 30 to 70 percent down from the top of the screen. This permits the separator to be serviced in a relatively short time, by replacing only the upper partial screen when holes are worn in it. This is feasible because most of the wear in these screens is confined to about the upper 30 percent of their height. If a screen support basket is used, it can be confine to the lower partial screen, so that it does not have to be removed in order to replace the upper partial screen.

Claims29

Dependent claims

In a vertical centrifugal separator comprised of a vertical drive shaft assembly;

a frustoconical flight assembly coaxially carried by said drive shaft assembly so that the base of the frustrum is down and the top of the frustrum is up, said flight assembly consisting essentially of a hollow frustrum of a right circular cone that has a plurality of parallel, spiral, hindrance flights attached to the exterior of its lateral wall;
a frustoconical screen also carried by said drive shaft assembly and mounted in such a position as to concentrically surround said flight assembly;
differential means for causing said flight assembly and said screen to spin in the same direction at different speeds;
and a housing that encloses said screen;
the IMPROVEMENT wherein the screen is in the configuration of a frustrum of a right circular cone and is divided horizontally into an upper partial screen and a lower partial screen, said partial screens being detachably held together, and the housing has an access door through which the upper partial screen can be detached from the lower partial screen and the rotor, removed from the housing, and replaced with a new partial screen, without removing the housing or the lower partial screen.

2 more elements

Dependencies are inferred from the claim text.