OCR Text |
Show Figure 1 shows that there is no discernable correlation between DRE and the amount of oxygen supplied to the combustor.for these fullscale facilities. Basically, if there is at least an excess amount of oxygen available, DRE's above 99.99% can be achieved. The data points that are "outliers" in Figures 1-5 are from the Ogden tests that were intentionally run at failure conditions. Figure 2 In the next figure, Figure 2, the stack or combustor outlet CO concentration is plotted against DRE. In this case, the data show that if CO is high, that the DRE MAY be low (other studies indicate that DRE may be above 99.99% under high CO conditions). Additional research is necessary under steady-state conditions to confirm the data above. One problem with obtaining this data under steady-state is that it takes approximately two to three hours to sample the stack gas for POHCs. Of course, it is difficult to produce a steady state level of CO, TUHC, and any other trace organic species for that period of time. 21 |