Air pollution control devices. Evaluation of SCR performance can also lead to Biomass combustion reduced the NOx emissions. The NOx reduction was about 55% in average. The slightly more than half reduction may indicate the need to improve the performance of the catalyst by operational controls and the ammonia distribution or flow. Measures of NH3 slip after catalyst have shown very low concentrations. The stoichiometry between NH3 and NOx were estimated below or near 1 in all the investigated periods. This shows that the ammonia flow for the NOx reduction was not high enough to reach optimal conditions in the catalyst. This also would explain the low NOx conversion.
Air pollution control devices. After the boiler, the flue gas will pass a wet flue gas cleaning unit. As such, the flue gases will be conditioned in a scrubber or baghouse. Depending on the material combusted in the CCC, an adsorbent mixture might be added to the flue gas. The spray injector will be designed as welded sheet metal construction with direct water cooling, with reinforcements, gas-tight welding, with all necessary built-in fittings and connecting flanges. The temperature-controlled nozzle injection system will inject the water via a nozzle connection. It is currently anticipated that the following emission values might be continuously monitored: CO, NOx, SO2, dust content, flue gas flow and flue gas temperature. However, before being vented to the atmosphere, the gas will be passed through wet scrubbing or a baghouse or a combination of both which will be part of the overall air pollution control equipment designed to reduce acid gases and particulate matter, etc. in compliance with PA-DEP’s the air pollution permit. If a wet scrubber or a combination bughouse/scrubber were to be ultimately installed, the waste water of the scrubber will also be piped to the Water Treatment System (WTS), DTE’s other fundamental technology in the overall plant process, as indicated above. Residue Handling Equipment As indicated above for the fundamental CCC process, the waste will be fed into each CCC in its "as dehydrated delivered" state with some additional applied drying using the process’ available excess heat. The waste fuel will travel through each CCC down a series of moveable “paddles” or "steps". During the combustion process, the ash residue will fall into a water quench trough for cooling and will be then conveyed by drag link chain conveyor to a dumpster on the side of each CCC for transport to a landfill or selling it to an industry which can make good use of it. The approximate residual ash volume to be expected as a result of CCC’s combustion of waste fuel is shown in the Energy & Mass Balance included at the end of this Schedule. Chimney/Stack The clean flue gas will be delivered to the chimney/stack via the off gas fan and then extracted to the atmosphere. The inside pressure for this system will be controlled by a frequency converter for the off gas fan. The steel chimney/stack will only be a few feet higher than the highest point of the roof, in free-standing and double-walled, self- supporting design. An analysis and monitoring system will be installed in the chimney/sta...
