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Show 21 TABLE 3 ESTIMATED COST ANALYSIS Uncontrolled NOu lb/hr, (lb/MMBtu) Controlled NOx, lb/hr, (lb/MMBtu) NOx Removed, tons/yr Reagent Use, gal/hr Reagent Cost(l), $/yr Water Cost(2), $1 yr Capital Cost, $/kW Capital Cost Annualized Capital Investment Maintenance, $/yr Power Requirements(3), $/yr Boiler Efficiency Penalty, MMBtul yr Boiler Efficiency Penalty (4) , $/yr Capital and O&M Costs, $/yr Total Cost, $/Ton NOx Removed (I) NOxOUT HP reagent cost of $0.74/gal. (2) Based on water cost of $2/1000 gallons (3) Based on energy cost of $0.03/kWh (4) Fuel cost of $1.675IMMBtu A16SE738.T 1,794 (1.3) 1,242 (0.9) 1,451 206 801,225 9,248 15 2,070,000 303,669 85,000 8,000 57,000 95,500 1,360,000 937 5. Consider lowering the level 2 injector from 116' to 106' elevation to reduce ammonia emissions. 6. Identify means of monitoring and reducing ammonia slip and S03. 7. Reduce the air heater leakage. 8. Operate at increased steam air heater outlet temperatures to shift the location of the ammonium bisulfate formation toward the cold end. This would make the deposits more accessible to sootblowing, and along with optimizing air heater sootblowing, possibly increase the time between water washes. 9. Provide a dedicated compressor to maintain 60 psig air for injection nozzles. |