Increasing and measuring filtration efficiency of a honeycomb body
AssigneeCorning Incorporated
InventorsPavel Boyuk, Joseph Henry Citriniti, Stefan Wolfgang Kramel, Cai Liu
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Abstract
Apparatus and methods are disclosed which apply inorganic particles to a plugged honeycomb body comprising porous walls, an inlet end and an outlet end. The apparatus comprises a particle counter and the method comprises counting a selected portion of the inorganic particles from a first sampling port upstream from the plugged honeycomb body and a second sampling port downstream from the plugged honeycomb body. The selected portion of the inorganic particles are in a preselected inorganic particle size range. Filtration efficiency can be determined while inorganic particles are being deposited, for example to increase filtration efficiency.
Claims20
A method of increasing a filtration efficiency of a porous honeycomb filter comprised of a plugged honeycomb body comprising porous walls, an inlet end and an outlet end, the method comprising:
- flowing an inlet flow of inorganic particles into the inlet end of the plugged honeycomb body;
- counting an inlet number of a selected portion of the inorganic particles entering the plugged honeycomb body;
- counting an exit number of a selected portion of the inorganic particles exiting the plugged honeycomb body in an outlet flow;
- wherein inorganic particles which enter the plugged honeycomb body without exiting the plugged honeycomb body are deposited onto and/or into the porous walls of the honeycomb body, thereby increasing a filtration efficiency of the plugged honeycomb body as deposition continues;
- determining a filtration efficiency of the plugged honeycomb body with the deposited particles based on the inlet number and the outlet number;
- and
- terminating the flowing of the inlet flow of inorganic particles into the inlet end of the plugged honeycomb body based on the determined filtration efficiency.
Dependencies are inferred from the claim text.