US 11,753,976 B2Granted

Asymmetrical channel structure of particulate trap filter body

AssigneeDalian University of Technology

InventorsWuqiang Long, Ge Xiao, Hua Tian, Jingchen Cui

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Abstract

A particulate trap filter body has asymmetrical channels. The cross-sectional shape of the asymmetrical channel structure includes a combination of hexagonal, square and triangular shapes. The hexagonal channel and the triangular channel act as inlet channel, and the square channel acts as outlet channel. Compared with the traditional symmetrical filter body structure, the inlet channel volume and filter body wall area can be effectively increased by more than 30%, which means that with capturing the same amount of particles, the particle cake layer formed on the wall surface is thinner. The limiting carbon load of the new channel structure is increased by more than 30%, having a very positive effect on reducing the regeneration frequency and prolonging the service life of the trap.

Claims9

Dependent claims

A particulate trap filter body, comprising a plurality of hexagonal channels, a plurality of square channels, and a plurality of triangular channels,

wherein each hexagonal channel is composed of six filter walls, each square channel is composed of four filter walls, and each triangular channel is composed of three filter walls,
wherein the plurality of hexagonal channels and the plurality of triangular channels are inlet channels opening at an inlet of the particulate trap filter body, and the plurality of square channels are outlet channels opening at an outlet of the particulate trap filter body,
wherein each square channel has a first pair of opposite filter walls and a second pair of opposite filter walls, the first pair of opposite filter walls being shared with two of the plurality of hexagonal channels, and the second pair of opposite filter walls being shared with two of the plurality of triangular channels.

Dependencies are inferred from the claim text.

Facts

Application: 17/281,214Filed 8 Oct 2019
Priority: CN 201811150998.829 Sep 2018
Published: US 2021/0404356 A130 Dec 2021
Granted: 12 Sep 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

F01N 3/022
By means of filters: characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
B01D 46/247
Characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure: of the cells
B01D 46/2482
Characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure: thickness,…
B01D 46/2486
Characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure: characterised…