Exhaust gas filter and apparatus for treating exhaust gases usin

Details Exhaust gas filter and apparatus for treating exhaust gases usin Exhaust gas filter and apparatus for treating exhaust gases usin

1995-06-06

1997-06-03

Spitzer, Robert

Gas separation

With nonliquid cleaning means for separating media

Cohesive filter media cleaning

55523, 55524, 55DIG30, B01D 3920, B01D 4600

Patent

active

056349521

ABSTRACT:
An imaginary plane dividing a profile of a rough surface of a filter into halves with equal volume is defined as a mean plane. Assuming cutting the filter with the mean plane, a ratio of the total cross-sectional area of the recesses appearing to the whole area of the mean plane is defined as a Valley Level. An exhaust gas filter having a surface with a Valley Level of at most 20%, a porosity of 40% to 55% and an average pore diameter of 5 .mu.m to 50 .mu.m effectively collects fine particles contained in exhaust gases discharged from internal combustion engines, such as diesel engines, with little pressure loss, and has an improved releasability of deposited fine particles and can be readily regenerated by flow of blowback air, with high efficiency. When the filter has a specified two-layer structure, the Valley Level is readily controllable.

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