| OCR Text |
Show history of the EP A MIS. In addition, the NO emission problem often associated with oxygen combustion was overcome by thisxadvancement in combustion technology. Additional experience has also been obtained in the operation of Weston's TIS, with the use of oxygen lancing systems. Again, transient emissions were significantly reduced in the field operation of TIS. The transient puffs of the incinerators were minimized effectively with this control system, probably due to three main reasons. First, with rapid feedback of the oxygen level, the oxygen feed was adjusted continuously to follow the trend of the oxygen demand, so that the oxygen level was sufficient at all times. Second, a stable kiln temperature helped to maintain a stable volatization and combustion in the kiln. Third, the high-momentum oxygen jets enhanced recirculation and mixing in the combustion chamber which should have reduced pockets of unburned combustibles. The success of this oxygen-based control strategy is a promISIng advancement of waste incineration technology. It should be widely applicable to many incineration processes. Although no control system can fully substitute for good operational discipline, this control technique will enhance an incinerator operator's ability to cope with the inevitable variability of waste feed. streams while concurrently increasing incinerator throughput. - 13 - |
