| OCR Text |
Show o W IU aaW:: 0ueo-n u.,z o ecn w::l a:o =s~ I-C c aw: a.. X w I- 2.8 2.7 2.6 2.5 2." 2.3 2.2 2.1 2.0 FURNACE BOTTOM TEMPERATURE VS . LOAD ,.............-,.............- .,.- t4~ ~ ~~\..\..~ ~----- ~-.".". 1-0--"--"-"-'---- """'"'"" E.\..-'.: ato.l'" ... - .".". ,.... ~ ~~e.....- ~.".". ~ \..Q'f! ~ ~~ i- ~.".". 300 350 ..a 0 "50 500 550 600 650 LOAD (MW) Figure 18. This graph shows the range of · furnace gas temperature obtained by Optical Pyrometer at ports 15, 16, 17 & 18, below the bottom row of burners. As indicated, temperatures were frequently much higher with the new Avon 9 burner, leading to increased wall slag in the lower furnace. FURNACE BOTTOM CO VS. PULVERIZER FIRING RATE AND IMPELLER DESIGN 700 10 ~----~---4~-----+~~~------~----+-----+-----~ 9 ~--~~~--~--~~~--~------~----+-----+-----~ 8 ~~~~-----+~~~----~--~--~----+-----~-----r- 7 ~~~~----~~---+--~~------~----+-----+-----~ o ~----~-----+----~----~~----~----~----~----~ 300 350 400 450 500 550 600 650 700 LOAD (MW) Figure 19 . CO and O2 concentrat ion were obtained at the fr ont and rear walls below the burners, at the locat i on s hown in Figur e 15 . The plots show the trend of average CO measurements from a number of test s . Furnace bo ttom CO was generally much i mproved with t he . para l lel spin impeller and when burning a t a moderate r ate. |
