Efficient Operation of Oil and Gas Fired Boilers

Operating Parameters Part 1 Explain why a primary superheater and a secondary superheater are normally connected in series to superheat steam. Describe how a decrease in main steam temperature affects boiler efficiency and heat rate. Identify common causes of a decrease in main steam temperature Explain how a reheater maintains hot reheat steam temperature. Describe how changes in hot reheat steam temperature affect boiler efficiency and heat rate. Identify common causes of a decrease in hot reheat steam temperature. Operating Parameters Part 2 Explain how attemperators limit steam temperature and describe the impact that attemperators have on boiler efficiency and unit heat rate. Describe how boiler efficiency and unit heat rate are affected by a decrease in main steam pressure. Describe how boiler efficiency and unit heat rate are affected by a decrease in economizer outlet water temperature. Describe how boiler efficiency and unit heat rate are affected by an increase in boiler exit gas temperature. Common Efficiency Problems Describe how boiler efficiency and unit heat rate are affected by steam leaks water leaks fuel leaks and air leaks. Describe how steam leaks water leaks fuel leaks and air leaks can be recognized. Describe how boiler efficiency and unit heat rate are affected by problems associated with the furnace flame.