Turbulent flow type metal honeycomb carrier with rectangular sheets

Abstract

The invention discloses a turbulent flow type metal honeycomb carrier with rectangular sheets and solves the problem that an existing honeycomb carrier has a relatively poor catalytic effect on smokeof an internal combustion engine. The turbulent flow type metal honeycomb carrier with rectangular sheets includes a stacked body and a cylindrical shell; the stacked body is put into the shell and includes foil strips and flat sheets which are staggered; a plurality of wave crest parts and wave trough parts arranged in parallel are formed on the foil strips; the wave crest parts and the wave trough parts are staggered and connected integrally; the inner sides of the wave crest parts and the wave trough parts are respectively provided with air channels; the wave crest parts and the wave troughparts each form one part of a wall body of the corresponding air channel; the metal honeycomb carrier is characterized in that each foil strip is provided with a plurality of protruding rectangular sheets; a corner portion of the outer end of each rectangular sheet is a sharp corner; each rectangular sheet extends into an interception surface of the corresponding air channel and is accommodated in this air channel; and each rectangular sheet forms an included angle of 0-60 degrees with the length direction of the corresponding air channel.

Description

technical field [0001] The invention relates to a metal honeycomb carrier used for catalytic purification of flue gas on automobiles and motorcycles. Background technique [0002] With the further implementation of the Euro V standard for motorcycle exhaust emissions, the motorcycle exhaust emission standards are getting higher and higher, especially the technical requirements for hydrocarbon emissions have become more stringent. It is difficult for catalysts made of conventional carriers to meet the existing standards. emission requirements. Conventional carriers used in existing motorcycle exhaust pipes are formed by rolling several layers of stacked flat sheets and corrugated sheet foils. The carrier is impregnated with a catalyst on the surface of the foil, and the flue gas after combustion of the internal combustion engine will contact the catalyst on the surface of the foil when it flows through the carrier, so that the catalytic purification of the flue gas can be re...

AI Technical Summary

Problems solved by technology

A number of separate airflow channels are formed in the carrier. When the gas flows through the carrier, the gas will pass through the airflow channel directly. The gas in the middle of the airflow channel is difficult to contact with the catalyst on the wall of the airflow channel, resulting in catalytic The effect is relatively poor

In the process of flue gas discharge, the gas flow velocity in the radial middle part of the gas flow channel is relatively fast, and the space velocity of the outer ring is relatively slow. The uneven gas flow velocity leads to uneven catalytic flue gas, and the catalytic effect is weakened.

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