UV-LED collimated radiation photoreactor
First Claim
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1. An ultraviolet (UV) reactor for irradiating a flow of fluid with UV radiation, the reactor comprising:
- a fluid conduit comprising a fluid inlet and a fluid outlet and a longitudinally extending fluid flow channel located between the inlet and the outlet, the fluid flow channel extending in a longitudinal direction from the inlet to the outlet for permitting a flow of fluid therethrough in a principal fluid flow direction parallel with the longitudinal direction, the fluid flow channel having a transverse cross section shaped to permit fluid flow throughout the cross-section including along a central axis extending in the longitudinal direction at a center of the cross section;
at least one UV light emitting diode (UV-LED) having a principal irradiation axis; and
a radiation-focussing element positioned in a radiation path of radiation emitted from the at least one UV-LED, the radiation-focussing element consisting of;
a converging lens located to directly receive the radiation emitted from the at least one UV-LED; and
a collimating lens located to directly receive radiation transmitted through the converging lens;
the converging lens shaped for collecting the radiation emitted from the at least one UV-LED and for directing the radiation transmitted through the converging lens to impinge directly on the collimating lens;
the collimating lens shaped for collecting the radiation transmitted through the converging lens and directing radiation transmitted through the collimating lens in the longitudinal direction, thereby directing the radiation transmitted through the collimating lens to impinge on the fluid flowing in the longitudinally extending fluid flow channel.
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Abstract
A reactor that operates with ultraviolet light emitting diodes (UV-LEDs) to attain UV photoreactions or UV photo-initiated reaction in a fluid flow for various applications, including water purification. The UV-LED reactor is comprised of a conduit means for passing fluid flow, an ultraviolet light emitting diode (UV-LED), and a radiation-focusing element to focus the UV-LED radiation to the fluid in the longitudinal direction of the conduit. The UV-LED reactor may include photocatalysts or chemical oxidants, which are activated by UV emitted by UV-LEDs for photocatalytic and photo-initiated reactions.
54 Citations
31 Claims
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1. An ultraviolet (UV) reactor for irradiating a flow of fluid with UV radiation, the reactor comprising:
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a fluid conduit comprising a fluid inlet and a fluid outlet and a longitudinally extending fluid flow channel located between the inlet and the outlet, the fluid flow channel extending in a longitudinal direction from the inlet to the outlet for permitting a flow of fluid therethrough in a principal fluid flow direction parallel with the longitudinal direction, the fluid flow channel having a transverse cross section shaped to permit fluid flow throughout the cross-section including along a central axis extending in the longitudinal direction at a center of the cross section; at least one UV light emitting diode (UV-LED) having a principal irradiation axis; and a radiation-focussing element positioned in a radiation path of radiation emitted from the at least one UV-LED, the radiation-focussing element consisting of; a converging lens located to directly receive the radiation emitted from the at least one UV-LED; and a collimating lens located to directly receive radiation transmitted through the converging lens; the converging lens shaped for collecting the radiation emitted from the at least one UV-LED and for directing the radiation transmitted through the converging lens to impinge directly on the collimating lens; the collimating lens shaped for collecting the radiation transmitted through the converging lens and directing radiation transmitted through the collimating lens in the longitudinal direction, thereby directing the radiation transmitted through the collimating lens to impinge on the fluid flowing in the longitudinally extending fluid flow channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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18. A method of irradiating a flow of fluid with ultraviolet (UV) radiation, the method comprising:
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providing a fluid conduit comprising a fluid inlet and a fluid outlet and a longitudinally extending fluid flow channel located between the inlet and the outlet, the fluid flow channel extending in a longitudinal direction from the inlet to the outlet; and causing a flow of fluid through the fluid flow channel in a principal fluid flow direction parallel with the longitudinal direction and throughout a transverse cross section of the fluid flow conduit, including along a central axis extending in the longitudinal direction at a center of the cross section; positioning a radiation focussing element in a radiation path of at least one UV light emitting diode (UV-LED having a principal irradiation axis, the radiation-focussing element consisting of; a converging lens located to directly receive the radiation emitted from the at least one UV-LED; and a collimating lens located to directly receive radiation transmitted through the converging lens; and shaping the converging lens to collect the radiation emitted from the at least one UV-LED and to direct the radiation transmitted through the converging lens to impinge directly on the collimating lens; shaping the collimating lens to collect the radiation transmitted through the converging lens and to direct the radiation transmitted through the collimating lens in the longitudinal direction, thereby directing the radiation transmitted through the collimating lens to impinge on the fluid flowing in the longitudinally extending fluid flow channel. - View Dependent Claims (19)
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30. An ultraviolet (UV) reactor for irradiating a flow of fluid with UV radiation, the reactor comprising:
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a fluid conduit comprising a fluid inlet and a fluid outlet and a longitudinally extending fluid flow channel located between the inlet and the outlet, the fluid flow channel extending in a longitudinal direction from the inlet to the outlet for permitting a flow of fluid therethrough in a principal fluid flow direction parallel with the longitudinal direction, the fluid flow channel having a transverse cross section shaped to permit fluid flow throughout the cross-section including along a central axis extending in the longitudinal direction at a center of the cross section; at least one UV light emitting diode (UV-LED) having a principal irradiation axis; and a radiation-focussing element positioned in a radiation path of radiation emitted from the at least one UV-LED, the radiation-focussing element consisting of; a first lens located to directly receive the radiation emitted from the at least one UV-LED; and a second lens located to directly receive radiation transmitted through the first lens; the first lens shaped for collecting the radiation emitted from the at least one UV-LED and for directing the radiation transmitted through the first lens to impinge directly on the second lens; the second lens shaped for collecting the radiation transmitted through the first lens and directing radiation transmitted through the second lens in the longitudinal direction, thereby directing the radiation transmitted through the second lens to impinge on the fluid flowing in the longitudinally extending fluid flow channel. - View Dependent Claims (31)
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Specification