Orange County NC Website
.. <br />Figure B-3. Typical Modular Combustion <br />Less than the ideal (stoiohiometrid amount of combustion air is injected into the <br />primary combustion chamber, and a combustible gas is produced from the <br />incomplete waste combustion. The gas from the burning waste is directed to a <br />secondary combustion chamber where additional air is added to complete the <br />burning process. Hot gases pass though a separate waste heat boiler for steam <br />generation and then through an air pollution control system before discharge through <br />the stack to the atmosphere. <br />A major advantage of this system is injection of |use air than ideal in the primary <br />combustion chamber. With less air, the fans can be smaller and the chamber its elf, <br />can be mrna||or than with other systems. Also, with less air flow, less particulate <br />matter (soot) enters the gas stream and the air pollution system can be sized fora <br />smaller load. <br />Modular systems are factory built and can be brought to a site and set up in a <br />relatively short period of time. They are less efficient than watanwa|| units in waste <br />burn-out and in energy generation. They have been built in unit sizes up to 150 <br />TPD. Multiple units are used to increase plant size to 300 - 400 T'PD, such as in <br />Agawam, MA. <br />1~1.3 Refuse-derived Fuel/Dedicated Boiler <br />RDF,inits simplest form, is shredded MEW with ferrous metals removed. Additional <br />processing, such as screening, can be applied to the incoming waste stream to <br />remove and recover glass, aluminum, and other non-combustible materials. <br />Additional processing stages may also be placed in the processing line, such as <br />sSource: ConsutechSysten/s Richmond, VA. <br />GBB/C08027-01 B-G August 15,2OO8 <br />