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Show Engineering and design of the field demonstration is nearly completed, and work has be gun on the field demonstration installation, with completion expected by October 1991. Shakedown of the field demonstration facility is anticipated to begin in November 1991, with operation and testing to begin in January 1992. Laboratory-Scale Pilot Testing Phase I of this project included laboratory-scale pilot work to support the demonstration unit design, installation, operation, and testing. The results of the laboratory pilot tests have aided engineering and design of the field demonstration facility as well as a comprehensive process assessment and design. Specifically, the objectives of the laboratory pilot tests included: • Evaluating commercial-size, integrated bag/catalyst arrangements. • Establishing expected S02' NOx' and particulate removal. • Establishing expected particulate and Nl\ emissions downstream of the baghouse. Description of Pilot Test Facility A schematic of the test facility is depicted in Figure 4. The facility consists of a pilot test furnace (0.5 MW e), insulated ductwork, a solids injection system, an ammonia injection system, a water-cooled heat exchanger to simulate the economizer section of an utility boiler, a hightemperature baghouse, and an ID fan. The high-temperature baghouse contained 12 commercialsize bag/catalyst arrangements. Each bag was 6-1/8 inches in diameter and 20 feet in length - yielding a total collection area of about 375 ftl. The baghouse employed an on-line pulse-jet cleaning system with a differential pressure switch to trigger baghouse cleaning. The baghouse utilized hightemperature, woven 3M Nextel™ bags for particulate removal and a vanadium-free, zeolite SCR catalyst from the Norton Company to promote NOx reduction by Nl\. I--------;:::============~ GAS ANAlY~ (SOl' NOx' 02) PARTlCULAn: .... LOADING 01 DFAN INS'1JI!U¥Q(T D£S!ONAl1O!f : ~. COHCEHTMT1OH WASTE I INDCATOA PULSE.JET BAGHOUSE WI CATALYST NH. IUECTlON Figure 4 SNRB Laboratory Pilot Test Facility |