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Q.i� �� �~� <br />Fftd <br />Line i <br />S'ad <br />Ul <br />Figure B-2~ Typical Mass-Burn WaterwaUU <br />The off-gas exiting the boiler passes through an air pollution control system where <br />the majority of�|��is�mm� and isdi�a���n�ha���� <br />atmosphere. VV -- is burned out to an ash |/ the furnace. Heat extracted from the <br />--' ^ ~~~- <br />watenwa||s and the boiler section generates steam vh|oh ^ in most facilities, is <br />directed to a turbine generator for electric power production. VVatenwa|| systems are <br />fabricated on-site They are generally applied to larger systems, 200 TPD up to 750 <br />TPD " with multiple units used when higher capacity is required. They are forgiving in <br />b| efficient in the burnout of waste and in the <br />their operation, and �r� reasonably e <br />generation of energy. <br />1~1.2 Modular Combustion <br />Modular combustion is another incineration process. Unprocessed MSW is placed <br />directly into a refractory lined chamber. The primary chamber of the incinerator <br />includes a series of charging rams which push the burning waste from one level to <br />another until it burns out to an ash and is discharged to a wet ash pit, as in Figure 13- <br />3. No or limited under-fire air is used to limit the entraining of ash into the flue <br />(exhaust) gas stream. <br />4 Source: Fairfax County, VA. <br />GBB/CO8027-01 B-5 August 15, 2008 <br />