Ultralow quantitative contaminant discharge combustion analysis and device

摘要

PURPOSE: To extremely reduce discharge of contaminants, i.e., nitrogen oxides, carbon monoxide and total hydrocarbon, by employing a first combustion chamber using a relatively small quantity of fuel and relatively low or high percentage of stoichiometric air demand, and a second combustion chamber using a large quantity of fuel along with excess air. CONSTITUTION: First combustion chamber 10, second combustion chamber 30 and a dilution chamber 50 are cascaded. First fuel part, i.e., 1%-20% of total fossil fuel, is introduced into a first combustion chamber 10 through a first inlet nozzle 15. First air is also introduced into a first combustion chamber 10 through a first inlet nozzle 15 by 140%-230% or 40%-90% of the stoichiometric demand for combusting the first fuel part completely. Second fuel part, i.e., 80%-90% of total fuel, is introduced into a second combustion chamber 30 through a second inlet nozzle 35. Second combustion air is also introduced into the second combustion chamber 30 through the inlet nozzle 35 by 150%-260% of the stoichiometric demand for combusting fuel completely in the chamber 30. Second combustion air flows through a passage 46 to the first and second inlet nozzles 15, 35.