【摘要】 华电国际山东百年电力发展股份有限公司#3锅炉由于管式空气预热器的堵塞和换热面腐蚀结垢,导致热风温度偏低、漏风严重,排烟温度居高不下,夏季锅炉效率低于设计值,发电煤耗严重超标。更换回转式空气预热器后,换热效率大幅度提高,同时,将一次风温在设计的基础上提高了50℃,风粉混合物温度升高30℃,增加了燃烧速度和进入空气预热器的风量,达到了降低排烟温度和飞灰可燃物含碳量、提高锅炉效率的目的。更多还原

【Abstract】 In the boiler No.3 of the Huadian International Bainian Electric Power Development Corporation Limited,due to the blockage of the tubular air preheater and the corrosion and scaling of the heat exchanging surface,the temperature of the hot air was lower,the air leakage was serious,and the temperature of the flue gas was higher. The boiler efficiency in summer was less than the designed value,and the gross coal consumption rate was exceeded the standard seriously. After the air preheater was replaced by rotary air-preheater,the heat-exchange efficiency was increased in large amplitude. The primary air temperature was increased by 50 ℃ above the designed value,the temperature of the mixture of air and coal powder was increased by 30 ℃,the consumption speed was increased,the air flow into the air preheater was increased,the temperature of the flue gas was decreased,the carbon content in combustible matter in fly-ash was reduced,and the boiler efficiency was increased.更多还原