Oct 30 2019 · The selection of fuel to burn in the boiler is the first opportunity to reduce flue gas contaminants. For example natural gas burns cleaner than fuel oil medical waste or biomass and produces the least amount of pollutants in its flue gas. Natural gas is considered a low-nitrogen fuel and yields very little NOx as a by-product of combustion.
Air tempering dampers are used on the primary preheaters to balance the air flow. From the ESP the combustion gases flow through three induced draft (ID) fans and into the flue gas desulfurization unit (FGD). The flue gas then enters a 625.5-ft stack and is exhausted to the atmosphere through the 26
The remaining oxygen not used in combustion in the case of excess air appears as gaseous flue gas and is used to measure combustion efficiency. It is used to determine flue gas loss and carbon dioxide content. Typical values in flue gas: Oil burners: 2% - 5% and Gas burners: 2% - 6%: Kane 455 Infra-Red Analyser. Testo 327-1 Flue Gas Analyser
Boiler Efficiency - an overview | ScienceDirect Topics
The flue gas loss depends on the final flue gas temperature and the amount of flue gases. Thus the higher the air ratio the higher the flue gas losses. The flue gases should leave the boiler at a temperature as low as possible to minimize the flue gas losses. Usually either economics equipment or corrosion issues limit the flue gas to 150 ...