Abstract
Measures such as low air-ratio combustion and exhaust gas recirculation have become the subject of a great deal of attention with a view to reducing the amount of environment impacting substances from the waste incineration process, and also to making the most effective use of energy. However, it has been understood there would be considerable difficulty utilizing low air-ratio combustion on the conventional grate furnace. The application of high-temperature air combustion technology for enhancing sound combustibility could provide solutions to these problems and it was studied before now. A practical test was conducted at a 105ton/day municipal solid waste stoker type incineration plant. The test demonstrated that stable low air-ratio combustion operation is possible at the stoichiometry of 1.3 with EGR (Exhaust Gas Recirculation) and high temperature air combustion technology resulting in a 17% decrease in flue gas flow, an energy efficiency improvement of 10%, and a significant reduction of toxic products emission when compared with a stoichiometry of 1.6 as conventional method.
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