Powder spraying system, powder spraying nozzle and method

PL4043104T3Active Publication Date: 2026-07-06JOHNSON MATTHEY PLC
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Patent Information

Application Number
PL2022155848T
Authority / Receiving Office
PL · PL
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-02-12
Filing Date
2022-02-09
Publication Date
2026-07-06
Estimated Expiration
2042-02-09

AI Technical Summary

Technical Problem

Current methods for treating diesel and gasoline particulate filters face challenges in maintaining filtration efficiency, particularly during the early life of the filter, during regeneration, and when loaded with soot, due to issues with controllability, flexibility, and durability of the treatment processes.

Method used

A powder spraying system and nozzle design that uses a suction force to promote the flow of dry powders, such as fumed alumina or metal compounds, into the filter, ensuring improved adhesion and distribution without the need for binders or high-temperature sintering, and allows for precise control of the spray angle and mixing with a carrier gas.

Benefits of technology

The system enhances filtration efficiency, durability, and even distribution of the dry powders on the filter walls, maintaining performance across various operational stages without the drawbacks of high-energy gas streams or uneven deposition.

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Abstract

A powder spraying system comprises a source of dry powder (4), a spray nozzle (25), and a supply conduit (16) connecting the source of dry powder with the spray nozzle. The spray nozzle comprises a nozzle body (50) having a nozzle outlet (51), a first conduit (52) for dry powder, and a second conduit (53) for gas. The first conduit extends between a powder inlet (54) in communication with the supply conduit and a powder outlet (55). The second conduit extends between a gas inlet (56) and a gas outlet (57), the gas outlet being located in proximity to the powder outlet such that a gas flowing through the second conduit and out of the gas outlet produces a suction force at the powder outlet to promote flow of a dry powder through the first conduit and out of the powder outlet and the nozzle outlet. The powder outlet and the gas outlet are orientated to promote mixing of the gas with the dry powder. The first conduit (52) is a straight conduit between the powder inlet (54) and the powder outlet (55).
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