Dravo Corporation

Willard Binzen

Robert S Catan

Edward T Manning, Jr

Samuel P Insana

Cornel Muhoray

An integrated dust containment system for machines such as rotary crusher/breakers, vibratory screens and the like of the type use in sizing dusty bulk materials, such as for coal, ore and the like. A substantially airtight enclosure having integral air filter means and fan means is detachably fitted to the machine housing adjacent the material treating station such that the air filter means is in communication with the dust generation area of the machine. A negative draft generated by the fan means draws in dust laden air from inlet and discharge zones of the machine, as well as from the material treating station for capture of the dust in the filter means and susequent discharge of clean, filtered air from the fan means. Pulsed, compressed air back flushing of the filter means cleans the filters and returns the collected dust cake to the machine interior for subsequent recovery.

Integrated dust containment system for rotary crusher/breakers and the

A method and apparatus for the containment of dust within a bulk cargo container such as a ship or barge hold. A horizontal stream of ambient air is directed across the hatch opening by a plurality of interconnected air curtain modules which captures fugitive dust along its path. A plurality of interconnected dust collector modules withdraw the entrained dust particles at an opposite side of the hatch opening and exhaust the filtered air stream therefrom and deposit the filter cake back into the hold. The clean exhaust air from the dust collector modules may be used to form a vertical air curtain to deflect crosswinds.

Dust containment system for bulk cargo containers

A bulk material receiving hopper is provided with a dust containment system which includes sloped shield plates positioned adjacent a top portion of the hopper to effectively close-off substantially all of the open space thereacross. Restricted material openings are defined by the shield plates and an isolated, dust containment region is established therebeneath to trap the displaced air and entrained fugitive dust generated during a dumping operation. One or more dust collector units communicate with the isolated dust containment region to draw in the displaced air and entrained dust particles.

Dust control in hoppers

A lump breaker apparatus for a rotary car dumper includes a porous barrier means in the form of a grizzly element, having sized openings therein and positioned in the flow path of the discharged bulk material prior to its entry into the hopper pit. Motorized impact means, preferably rotatable drum means, having a plurality of outwardly protruding striking elements, is mounted on the frame of the rotary dumper, extending between the end plates thereof and moveable with the frame. The impact means is selectively activated to engage and breakup lumps of oversized bulk material retained on the grizzly during a dumping cycle.

Rotary car dumper with lump breaker apparatus

The dust collection units in a rotary railroad car dumper installation are mounted over the hopper pit along one or both sides of the cylindrical, rotatable dumper frame so that dust ladened air can be sucked directly into the dust collection units without the need for duct work and the collected dust can be returned directly to the pit without the need for easily clogged screw conveyors and small chutes. A fixed enclosure means encloses the top and sides of the dumper frame and form with air shields mounted on the cylindrical dumper frame, a rotary valve which restricts flow such that ambient air is sucked into the hopper pit by the duct collection units at velocities which exceed the capture velocity of the dust clouds created by dumping of the contents of the car.

Rotary car dumper with dust collection system

The dust collection units in a rotary railroad car dumper installation are mounted over the hopper pit along each side of the cylindrical, rotatable dumper frame so that dust ladened air can be sucked directly into the dust collection units without the need for duct work and the collected dust can be returned directly to the pit without the need for easily clogged screw conveyors and small chutes. The dust collection units also form with air shields mounted on the cylindrical dumper frame, a rotary valve which restricts flow such that ambient air is sucked into the hopper pit by the dust collection units at velocities which exceed the capture velocity of the dust clouds created by dumping of the contents of the car. The air shields include orthogonal pairs of planar members mounted on the rotary frame. One planar member extends outward from the top of one side of the car to be dumped such that the side of the car forms part of the air shield and the gap under the car forms, just as the car contents are being dumped, a longitudinal slot through which ambient air is sucked to sweep away the resultant billowing dust cloud.

Growing community of inventors

Gibsonia, PA, United States of America

Willard Binzen