STACK LINING RETROFIT HAS THREE-YEAR PAYBACK

摘要

Like Many Power plants constructed in the early 1970s, Louisville Gas & Elec-tric's (LG&E). 2,000 MW Mill Creek coal-fired power plant was required to add a wet scrubbing systems to comply with EPA pol- lution control guidelines. As part of the wet scrubber installation a re-heater system was also installed. The re-heaters are designed for full flow heating of the treated flue gas prior to its release into the atmosphere. Unfortunately, the re-heater proved inefficient and reduced the plant's energy production by approximately three percent. In addition, the re-heater system resulted in continual maintenance problems from leaking tubes, and the flue gas left a sulfuric acid residue as it passed through the stack. Over a period of time this residue caused severe deterioration of the carbon steel linings in the plant's three 630-ft stacks.