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US 2006/0219235 A1Published application
Fume treatment method and apparatus using ultraviolet light to degrade contaminants
AssigneeHalton Oy
InventorsRick Bagwell, Darren Beardslee, Derek Schrock, Andrey Livchak
Life of this patent
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Abstract
An ultraviolet treatment chamber for treating exhaust streams, particularly those containing organic particulates, utilizes ultraviolet light energy very efficiently. This is done by setting up a circulating flow in a treatment plenum so that all of the effluent experiences a substantially uniform residence time without the need for baffles or other flow controllers that would block the ultraviolet light.
Claims11
A flow treatment apparatus, comprising:
- a flow vessel with an inlet and an outlet;
- said flow vessel having at least one inlet and at least one outlet;
- an ultraviolet light source in said flow vessel;
- said flow vessel being configured to generate a flow therethrough that provides a substantially constant residence time therein for all fractions of a flow entering said flow vessel without blocking light from said ultraviolet light source to permit said ultraviolet light source to irradiate said flow in said flow vessel.
1 more element
An ultraviolet treatment device, comprising:
- a kitchen exhaust hood with a plenum attached thereto and in flow communication with an exhaust stream from said hood;
- said exhaust hood having a recess;
- said plenum containing at least one ultraviolet light source;
- said plenum having a volume at least as great as an interior volume of said recess;
- said plenum being configured to generate a flow therethrough that takes at least one turn, said flow being exposed to said light during a majority fraction of a residence time in said plenum.
2 more elements
An ultraviolet treatment device, comprising:
- a kitchen exhaust hood with a plenum attached thereto and in flow communication with an
- exhaust stream from said hood;
- said exhaust hood having a recess;
- said plenum containing at least one ultraviolet light source;
- said plenum having a volume at least as great as an interior volume of said recess;
- said plenum being configured to generate a circulating flow therethrough that insures that substantially all of said flow through said plenum experiences a substantially uniform residence time in said plenum.
3 more elements
Dependencies are inferred from the claim text.