Cautious optimization strategy for emission reduction
AssigneeHoneywell International Inc.
InventorVladimir Havlena
Life of this patent
Estimating the term…
Abstract
A system of controlling combustion of fuel in a boiler having an adjustable air-to-fuel ratio. A first sensor is used to measure the CO production to provide a CO distribution range during a period of time for the combustion A second sensor measures the NOx production to provide a NOx distribution range during this period of time for the combustion. A controller adjusts the air-to-fuel ratio to cause combustion of the fuel within the CO distribution range and the NOx distribution range to thereby cause the actual emission for the CO and NOx distributions to average less than the maximum permitted. Preferred time ranges are from 15 to 30 minutes, and the air-to-fuel ratio is selected to produce actual emissions averaging 95% of said maximum.
Claims12
A method of controlling combustion of fuel in a boiler having adjustable air-to-fuel ratios, comprising the steps of:
- measuring the CO emission production to provide a CO emission distribution range during a period of time for said combustion;
- measuring the NOx emission production to provide a NOx emission distribution range during said period of time for said combustion;
- and
- adjusting the air-to-fuel ratio to cause combustion of said fuel within said CO emission distribution range and said NOx emission distribution range to thereby cause the actual emission for said CO and NOx emission distributions to average less than the maximum permitted at the power station.
A system of controlling combustion of fuel in a boiler having an adjustable air-to-fuel ratio, comprising:
- a first sensor for measuring the CO emission production to provide a CO emission distribution range during a period of time for said combustion;
- a second sensor for measuring the NOx emission production to provide a NOx emission distribution range during said period of time for said combustion;
- and
- a controller for adjusting the air-to-fuel ratio to cause combustion of said fuel within said CO emission distribution range and said NOx emission distribution range to thereby cause the actual emission for said CO and NOx emission distributions to average less than the maximum permitted at the power station.
A system of controlling combustion of fuel in a boiler having an adjustable air-to-fuel ratio, comprising:
- first sensor means for measuring the CO emission production to provide a CO emission distribution range during a period of time for said combustion;
- second sensor means for measuring the NOx emission production to provide a NOx emission distribution range during said period of time for said combustion;
- and
- controller means for adjusting the air-to-fuel ratio to cause combustion of said fuel within said CO emission distribution range and said NOx emission distribution range to thereby cause the actual emission for said CO and NOx emission distributions to average less than the maximum permitted at the power station.
Dependencies are inferred from the claim text.