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US 11,519,635 B2Granted
Gas fired process heater with ultra-low pollutant emissions
AssigneeGas Technology Institute
InventorsAleksandr Kozlov, David Kalensky, Mark Khinkis, Vladimir Shmelev, Vladimir Nikolaev
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Abstract
Process heaters and associated methods of processing with ultra-low pollutant emissions are provided. The process heaters and methods utilize a heat exchange tube having disposed therein a radiant permeable matrix burner at a first end of the tube. The tube further includes a thermally insulated insert disposed adjacent the radiant burner opposite an oxidant-fuel mixer that feeds the burner. The process heaters and methods act to reduce emissions of CO and NOx.
Claims20
A process heater comprising:
- a tank adapted to contain a body of liquid;
- a heat exchange tube including at least a first end disposed in the body of liquid;
- a radiant permeable matrix burner disposed inside of the heat exchange tube at the first end, the burner including an outlet end and configured to produce hot combustion products directed from the outlet end of the burner into the heat exchange tube;
- an oxidant-fuel mixer to mix an oxidant material with a fuel material to form a combustible mixture of oxidant and fuel, the oxidant-fuel mixer exteriorly disposed adjacent the first end of the heat exchange tube in oxidant-fuel mixture fluid transfer communication with the radiant burner;
- and
- a thermally insulated insert disposed within the heat exchange tube adjacent the outlet end of the radiant burner opposite the oxidant-fuel mixer, wherein the thermally insulated insert is configured to limit heat transfer to the heat exchange tube from the combustion products directed from the outlet end of the radiant burner.
3 more elements
A method for processing heat, the method comprising:
- introducing an oxidant material and a fuel material into an oxidant-fuel mixer disposed exteriorly adjacent a first end of a heat exchange tube, the tube including at least a first end disposed in a body of liquid contained in a tank;
- mixing the oxidant material with the fuel material to form a combustible mixture of oxidant and fuel;
- transferring the combustible mixture of oxidant and fuel to a radiant permeable matrix burner disposed inside of the heat exchange tube;
- combusting the combustible mixture of oxidant and fuel to produce hot combustion products via the radiant permeable matrix burner disposed inside of the heat exchange tube, the heat exchange tube including a thermally insulated insert disposed therein adjacent an outlet end of the radiant burner opposite the oxidant-fuel mixer;
- limiting heat transfer to the heat exchange tube from the outlet end of the radiant burner through the thermally insulated insert;
- and
- transferring heat from the hot combustion products to the body of liquid contained in the tank via the heat exchange tube.
4 more elements
Dependencies are inferred from the claim text.