Split flow particulate filter

Details Split flow particulate filter Split flow particulate filter

1985-07-23

1987-06-16

Hart, Charles

Gas separation

Plural serial basically diverse separating media

Plural stages in unitary casing

55321, 55337, 55320, 55476, 55484, B01D 4612

Patent

active

046734236

ABSTRACT:
A particulate filter for exhaust gases is disclosed which includes two filter members of suitable porous, heat-resistant material, longitudinally spaced to provide a dead space between the two filter members. The filter members are disposed within a housing in spaced relationship to the outer wall of the housing to provide an annular passage between the filter members and the outer wall of the housing for flow of exhaust gases therethrough. Provision is made for delivering exhaust gases to the dead space and then causing the exhaust gases to flow from the dead space through two paths to the outlet of the particulate filter. One of these paths provides for flow directly through one of the filter members to the outlet. The other path provides for flow of exhaust gases through the other of the filter members to the annular space and then along the annular passage external of the filter members to the outlet. A swirl plate or deflector plate may be provided to distribute the exhaust gases more uniformly over the surface of the filter members. In another embodiment of the invention the inlet for exhaust gases extends into the dead space, and is closed by a cap having a plurality of circumferentially spaced openings for distributing the exhaust gases over the surface of the filter members. Alternatively, the exhaust gases may be delivered by an inlet tangentially of an inner wall of the dead space to provide more uniform radial distribution of exhaust gases.

REFERENCES:
patent: 771414 (1904-10-01), Brown
patent: 3616617 (1971-11-01), DeGroote
patent: 3735567 (1973-05-01), Viers
patent: 3847577 (1974-11-01), Hansen
patent: 4006000 (1977-02-01), Tortorici et al.
patent: 4256474 (1981-03-01), Berger, Jr. et al.
patent: 4419113 (1983-12-01), Smith
patent: 4427423 (1984-01-01), Montierth

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