【摘要】 分析了北仑发电厂６００ Ｍ Ｗ 锅炉再热器局部超温及旁路改造未能达到预期效果的原因；详细介绍了采用在低温管屏中加节流圈为主的改造方案和计算过程。改造后最高温度屏的出口壁温下降了１０ ～１５ ℃，提高了机组的运行可靠性，节流圈引起的再热器阻力增加只有１１ ｋ Ｐａ ，改造后电厂的直接经济效益为每年１７０ 万元。更多还原

【Abstract】 The causes for local overtemperature of high temperature reheater of 600 MW boiler in Beilun Power Plant and that bypass retrofit could not realize the expected effect are analyzed;the retrofitting scheme by fitting throttle rings in low temperature reheater platen and calculation process are described in detail.After retrofit,the wall temperature at the outlet of the highest temperature platen decreased by 10～15 ℃ with unit’s operation reliability improved.The increase in reheater resistance as a result of throttle rings only amounted to 11 kPa,the direct economic benefit of power plant reached 1 7 million yuan.更多还原