OCR Text |
Show 1. 2 Test Results 1) Basic Data of the MSW-Burning Furnace Basic data was collected from the Takuma Unit #1 currently operating at Rochester, Minesota. Outl ine of the incineration plant is I isted below, and the cross section of the furnace area is illustrated in Figure 2. Name of Plant: Olmstead Waste-to-Energy Fac iii ty Capac i ty 100 TPD x 2 un its 80 i I e r Size 11, 340 Kg/h x 2 Power Outlet 4.1 MW c I FURNACE °EXIT o : o REFRACTORY EXIT , o 0 0 O. I I I I Exhaust Gas Treatment: Electrostatic Precipitator (ESP) OROP- 1"'--_"'. o OUT PASS This furnace uses stoker system which consists of drying, combustion and burnout grates. Table 1 shows data collected furnace traverses 1.2 meters above the grate surfaces, and the gas analyses at refractory exit and at the inlet to ESP. According to this data, CO content at the drying grate near the hopper is in the percent order, whi Ie it decreases to ppm order as the MSW proceeds from the combustion grate to the burn-out grate. Table 2 shows the effect of secondary air injection and the extent of excess air upon combust ion. SUPERHEATER Figure 2 TAKUMA MSW COMBUSTER Table 1 BASELINE FIELD TEST DATA (as measured) Refractory Ex i t Prec ipi tation Drying Combustion Burnout Front Rear Inlet O2 , " 0.9 10. 9 20.5 7.5 9. 9 9.0 NOx, ppm 83 85 0 176 133 164 CO, %(ppm) 10. 1 5.1 (20) (20) (218) (35) THe, %(ppm) > 1. 0 >1. 0 (2700) (3) (154) Table 2 IMPACT OF OFA ON NOx COMBUSTIBLES AT THE FURNACE EXIT OFA Used Excess Air, " Normal None None >60 57 23 NOx. ppm CO. ppm THe. ppm .............................. at 12" O2 ................. .. 125-175 88 45 3 20-30 230 1300 0-15 30 750 |