Filter cleaning
AssigneeTistech SPRL
InventorLaszlo LUDIK
Life of this patent
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Abstract
The present invention generally relates to a process and apparatus for cleaning and removing particulate deposits in a particulate filter, in particular for the dry removal of ash deposits with a diesel particulate filter. Compared to the art known procedures, the method of the present invention is based on the provision of a two-stage process including a stage wherein the filter is exposed to a structural resonant frequency under pressure and a stage wherein the filter is exposed to a reverse flow. Combination of a structural resonance frequency with a reverse flow results in an efficient two-stage removal of the debris from the filter without causing any damage to the ceramic body of the filter.
Claims17
A two-stage method for cleaning a particulate filter the method comprising;
- a first stage imposing the particulate filter to a structural resonant frequency whilst under increased air pressure in a first sense, wherein the air pressure is increased in the direction of the clean part of the particulate filter;
- and
- a second stage imposing the particulate filter an air flow in the direction of the unclean part of the particulate filter,
- wherein there is no flow of air through the particulate filter in the first stage, and wherein the air pressure in the particulate filter is increased to a pressure of about and between 4.5 bar to 6.0 bar.
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Dependencies are inferred from the claim text.