초록 ▼

A solid particulate filtering apparatus employs a plurality of unidirectional flow type honeycomb filter elements operating in parallel to provide improved particulate loading and useful operating time than was provided by the single, long, narrow type of unidirectional flow filter previously employ

A solid particulate filtering apparatus employs a plurality of unidirectional flow type honeycomb filter elements operating in parallel to provide improved particulate loading and useful operating time than was provided by the single, long, narrow type of unidirectional flow filter previously employed. The effective collective diameter of the plurality of elements is greater than their effective length and, preferably, their individual effective diameters approximate or exceed their individual effective lengths to maximize the improved particulate loading capacity and operating time characteristics of the apparatus. The plurality of smaller elements are also subjected to lower thermally induced stresses than would be a single larger filter of the same effective aspect ratio and the described filter housing fosters flow about the outside of the elements further reducing the occurrence of stresses induced by thermal gradients within the filters. The apparatus is particularly useful for diesel engine exhaust and other solid particulate filtering applications involving fluids at elevated temperatures. A method of filtering solid particulates from fluids by use of the apparatus comprises dividing a contaminated-fluid-carrying conduit into an upstream portion of a downstream portion with a partition, then positioning the plurality of filter elements through the partition, and thereafter passing the fluid through the conduit and filters.

대표청구항 ▼

In a conduit transporting a fluid contaminated with solid particulates between a source and a disposal point a solid particulate filtering apparatus comprising: a housing across said conduit having an inlet connected to an upstream portion of the conduit extending from said source and an outlet conn

In a conduit transporting a fluid contaminated with solid particulates between a source and a disposal point a solid particulate filtering apparatus comprising: a housing across said conduit having an inlet connected to an upstream portion of the conduit extending from said source and an outlet connected to a downstream portion of the conduit continuing to said disposal point; a plurality of honeycomb filter elements located in the housing, each element being formed by a multiplicity of interconnected thin walls defining an inlet end face and an opposing outlet end face and a multiplicity of cells extending substantially mutually parallel and longitudinally through the element between the inlet and outlet end faces, an inlet group of the cells being open at the inlet end face and closed near the outlet end face, an outlet group of the cells being closed near the inlet end face and open at the outlet end face, the thin walls having interconnected open porosity of a volume and size sufficient to enable the fluid to flow at least across the narrow dimensions of the thin walls and to prevent at least a significant portion of the solid particulates from passing across or through the thin walls in any direction; and the elements being positioned in said housing such that the inlet end faces of all of said plurality of elements generally lie in a common plane and are exposed to the contaminated fluid transported to the housing through the upstream portion of the conduit, and the cells of all of the plurality of elements commonly extend substantially mutually parallel to each other, whereby said elements act in parallel to filter said fluid. A method of filtering solid particulates from fluids comprising the steps of: dividing a conduit carrying the contaminated fluid into an upstream portion and a downstream portion with a partition; positioning a plurality of honeycomb filter elements through the partition, each element being formed by a multiplicity of thin interconnected walls defining an inlet end face and an opposing outlet end face and a multiplicity of inlet and outlet cells extending between the inlet and outlet end faces, the inlet cells being open at the inlet end face and closed near the outlet end face, the outlet cells being closed near the inlet end face and open at the outlet end face, the thin walls having interconnected open porosity of a volume and size sufficient to enable the fluid to flow at least across the narrow dimensions of the thin walls between adjoining cells and to prevent at least a significant portion of the solid particulates in the exhaust gas from passing entirely across or through the thin walls in any direction, the inlet end faces of all of said plurality of elements generally lying in a common plane and communicating with the upstream portion of the conduit, the cells of all of the plurality of elements commonly extending substantially mutually parallel to each other, and the outlet end face of each element communicating with the downstream portion of the conduit; and passing the fluid through the conduit and plurality of filters.