专利名称：Apparatus for controlling pollution from a
cement plant
发明人：James J. Schwab,Ronald L. Hawks申请号：US11777165申请日：20070712公开号：US07862332B2公开日：20110104
专利附图：
摘要：A method and apparatus for reducing air pollutants associated with dryprocess, precalciner cement manufacturing is shown. Raw feed meal used in cementproduction is heated in a special heating chamber to drive off volatile compounds, such as
organic materials and salts of ammonia. Preferably, the feed meal is heated to atemperature of at least 350° F. The gases that are driven off flow to the precalcinerwhere they are combusted and rendered harmless. Heat is provided by diverting at leasta portion of the exhaust gases from the cement pyroprocessing kiln to the specialheater. The raw feed meal is indirectly heated using a heat exchange wall between thefeed meal and the kiln exhaust gas flow. In addition, a base-containing material such aslime or precalcined feed meal, may be added to the raw feed before treatment meal topromote the breakdown of inorganic ammonium compounds, thereby releasing gaseousammonia which is also destroyed upon subsequent combustion. Hot precalcined mealmay also be used to provide some of the heat required to heat the raw feed meal in thespecial heating chamber.
申请人：James J. Schwab,Ronald L. Hawks
地址：Napa CA US,Raleigh NC US
国籍：US,US
代理机构：Townsend and Townsend and Crew LLP
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