Boiler Optimization and MATS Compliance Testing Using Delta CO/O2/NO Extractive Monitoring Systems

摘要

Today s stringent environmental regulations often require Electric Power Plants to operate at much lower O_2 levels than in the past. Carbon Monoxide is a by-product of incomplete combustion which increases rapidly when poor combustion occurs in a fuel rich environment. Traditionally, in-situ O2 probes have been used to measure duct O2 after the combustion zone. This method of measurement can be effective for determining overall low O_2 set point. However, it has proven to be very ineffective for burner and combustion tuning. Optimum combustion across the furnace becomes critical under these conditions in order to reduce emissions and increased efficiency. Standard practice has been to install a temporary CO grid in the boiler back-pass, or economizer section while boiler tuning. With Advancements is probe design and particulate filtration, continuous monitoring of combustion gases in larger grids is now possible. The new MATS regulations require Coal Fired Power Utilities to do periodic boiler tuning, and provide documentation to meet the MATS requirements. This paper will show how a continuous combustion system can be used as a primary tool for collecting boiler performance data, and for optimizing combustion. In addition the paper will outline how a continuous combustion monitoring system can accomplish the following results. 1. Continuously operate boiler in optimized combustion zone. 2. Correct for O2 error due to in-furnace leakage. 3. Various length probes can extract from areas conventional O2 probe cannot. 4. Reduced boiler slagging. 5. Improve SCR / SNCR Performance. 6. Reduce fire side corrosion due to high CO. 7. Increase boiler efficiency. 8. Lower flue gas velocities through the furnace and precipitator. 9. Conduct periodic boiler tuning, and for measuring additional combustion gasses.