Apparatus and Method for Avoiding Fluid Bypass in Particulate Filters

摘要

A filter contains fluent particulate, such as carbon granules. The filter is divided into a plurality of cell chambers by walls, including an upper wall. The upper wall has a surface that faces, and is closest to, the top surface of the particles. The upper wall surface is oriented so that, as the particles settle, any gap formed between the top surface of the particles and a portion of the upper wall surface will not extend from the upstream to the downstream sides of the filter. Instead, contact is maintained between the top surface of the particles and the upper wall surface during fluid flow through the filter, and therefore any gas flowing through the frame must flow through, and through spaces around, particles. An angle between the upper wall surface and the flow direction of gas striking the filter is greater than about three degrees.

主权项

1. A filtration apparatus containing fluent particles that chemically modify compounds in gases that make contact with the particles, the apparatus comprising:
(a) a frame divided into a plurality of cell chambers, each cell chamber containing a quantity of the particles, each cell chamber defined by at least an upper wall that is positioned above a top surface of the quantity of the particles when the frame is oriented substantially vertically in operable orientation, the upper wall having an upper wall surface that faces, and is closest to, the top surface of the quantity of particles; and (b) the upper wall surface forms an angle with an upstream face of the frame that is greater than about 93 degrees, thereby forcing all gas flowing through the frame to flow in contact with at least some of the particles.