Cement, Energy and Environment

fume, slag are not available in abundance either. In such scenario, PPC is ideal solution', Mr. Malhotra sa id. Courtesy: Teri Newswire 16-28 Feb 2002, P-24. Fnx:4682144 E-mail: outreach@teri. res. in Web: www. teriin. org UNCONVENTIONAL TECHNOLOGY MEETS ENVIRONMENTAL CHALLENGE F. L. smidth has completed a turnkey project for Dyc kerhoff's Lone Star indus tries in the environmentally sensitive Midwest, USA. The perfor-mance results of the new semi-dry pyre– processing sys tm a t the Greencastle, Indiana Plant have been nothing less than spectacular. The raw materials a t Greencastle contain organic ca rbon and p y ritic s ul phur as well as hydrocarbons and ammonia. As such, a large potential exists for.high S0 2 , THC and CO emissions because these components normally evolve in the upper stages of a modern dry– process preh eater. Recogni zing tha t it was theoretica lly possible to d esign a semi-dry system in such a way tha t SO., NO., NHy CO, and even "blue haze" emissions are avoided, F. L. Smidth put forth a semi-dry process proposal. Ultimately, selection of F. L. Smidth's semi-dry techno l ogy en able d Lone Sta r Industries (LSI) to avo id a ver y cos tl y investment in pollution control equipment, namely a wet scrubber and a thermal oxidizer. The trials were initia lly made a t F. L. Smidth's Dania Research Center in Denmark using actual Green cas tl e r aw m a teri a ls . Th ese tri a ls demons tra ted the v iab ility of semi-dry technology. The semi-dry technology had to ensu re that the alte rna te fuel could s till be utilized w hile demonstrating su fficient removal efficiencies of pollutants such as HCL, cadmium, lead , etc. Using F. L. Smidth's DUOFLEX burner, the plant successfully re-certi fied unde r the BIF (Boiler and Ind us trial Furnace) regu lations while burning solven ts having considerable amounts of chlorine (2-3°1<>). Courtesy: Highlights Apr. 2002, Pp 5-6, Fax: +453630 1820 E-mail: info@flsmidth .com Web: www. flsmidth.com SAYING NO TO NO, . Cndence Environmentnl Energy Cement kilns are the near perfect env ironment to create NOx emissions. The Mixing Air Turbo, from Cad en ce, s tops the formation of NOx when used in conjuncti on w ith mid kiln fuels which alone can cut NOx emission s by 30°/r, However, with the Mix ing A ir Turbo, an additional SO% NOx red uction can be expec ted. Together, the two technologies can cu t NOx emissions by 65%. The system is a high efficiency fan, mounted on the kiln over the calcining zone. The fan blas ts a steady of air in to the kiln through a special nozzle. The powerful air flow crea tes a tornado like swirling ac tion that enhan ces combustion and lowers NOx emissions by mixing strati fied gases. It is in operation in the US and Europe. Courtesy : World Cement May 2002 P 74, Enquiry No: 10, Fax: +44(0) 1252718992 Email: mnil @ worldcement.com Web: www. worldcement.com . . - ....