PROJECT TITLE :

Cement Plant Environmental Technology for Achieving High $hbox_$ Removal

ABSTRACT:

The U.S. Environmental Protection Agency has adopted revised emission limits to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for the Portland cement producing trade and revised emission limits to the New Supply Performance Standards (NSPS) for Portland cement plants. These changes revise the emission limits for specified air pollutants for brand new and existing cement plants. The NESHAP rules address the emission limits for materials such as mercury, total hydrocarbons (THCs), hydrochloric acid (HCl), and particulate matter. The NSPS address particulate matter, opacity, nitrogen oxides ( $hboxNO_x$), and sulfur dioxide $(hboxSO_2 ) $. Herein, a case study is presented in which a completely unique environmental technology was utilised to help achieve $hboxSO_2 $ removal efficiencies in excess of ninety sevenpercent for a cement plant located in the United States. A slurry scrubber was specified for this application because of its unique ability to attain high removal efficiencies for $hboxSO_2 $-made waste gases, using a low-cost reagent. Further capabilities of this system specific to the cement industry are also mentioned, such as hot gas quenching, particulate removal, and resistance to the corrosive, abrasive, and thermally intense environments usually found in cement plants.