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US 10,808,927 B2Granted
Pre-mixed fuel burner with perforated flame holder
AssigneeClearsign Technologies Corporation
InventorsDouglas W. Karkow, Joseph Colannino, Robert E. Breidenthal, Christopher A. Wiklof
Life of this patent
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Abstract
A combustion system such as a furnace or boiler includes a perforated reaction holder configured to hold a combustion reaction that produces very low oxides of nitrogen (NOx).
Claims25
A combustion system, comprising:
- a premix chamber configured to receive an oxidant and a fuel,
- wherein the premix chamber is configured to provide an oxidant-fuel mixture into a chamber volume;
- and
- a perforated reaction holder positioned within the chamber volume,
- wherein the perforated reaction holder is displaced from the premix chamber and aligned with the premix chamber to receive the oxidant-fuel mixture;
- wherein the perforated reaction holder carries a combustion reaction while at least part of the oxidant-fuel mixture combusts;
- wherein the premix chamber is configured to receive an oxidant inlet extending at least partially into the premix chamber and a fuel inlet at least partially carried within the oxidant inlet;
- and
- wherein the oxidant inlet is terminated, inside the premix chamber, at an angle that directs incoming fuel and oxidant away from an outlet of the premix chamber and causes the fuel stream and the oxidant stream to mix in a pair of counter-rotating vortices within the premix chamber mix prior to passing through the outlet.
6 more elements
A method of generating a combustion reaction, comprising:
- receiving an oxidant in a premix chamber from an oxidant inlet extending at least partially into the premix chamber;
- receiving a hydrocarbon fuel into the premix chamber from a fuel inlet at least partially carried within the oxidant inlet;
- mixing the hydrocarbon fuel in the premix chamber, to generate an oxidant-fuel mixture, wherein the oxidant inlet terminates inside the premix chamber at an angle that directs incoming hydrocarbon fuel and oxidant away from an outlet of the premix chamber and causes a stream of the hydrocarbon fuel and a stream of the oxidant to mix in a pair of counter-rotating vortices within the premix chamber mix prior to passing through the outlet of the premix chamber;
- delivering the oxidant-fuel mixture into a chamber volume to enable combustion of the oxidant-fuel mixture by a perforated reaction holder,
- wherein the perforated reaction holder is separated from the premix chamber by a predetermined distance;
- and
- maintaining the combustion reaction with a plurality of perforations through the perforated reaction holder, by receiving the oxidant-fuel mixture at an inlet surface of the perforated reaction holder, and by releasing flue gases at an outlet surface of the perforated reaction holder.
4 more elements
Dependencies are inferred from the claim text.