热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2014年
5期
13-15
,共3页
空气预热器%排烟温度%非平衡换热器%供电煤耗%热效率
空氣預熱器%排煙溫度%非平衡換熱器%供電煤耗%熱效率
공기예열기%배연온도%비평형환열기%공전매모%열효솔
air preheater%exhaust temperature%non-balance heat exchanger%coal consumption for power supply%heat efficiency
针对回转式空气预热器的旋转特性、低温腐蚀堵灰特征以及出口烟气温度分布规律，提出了在空气预热器入口设置非平衡换热器，将烟道分隔为几个小烟道，通过适度地降低各个小烟道的入口烟气温度，使锅炉排烟温度分布趋于平衡并整体有所降低，最终达到进一步降低锅炉排烟温度的目的，提高锅炉热效率或机组热效率。
針對迴轉式空氣預熱器的鏇轉特性、低溫腐蝕堵灰特徵以及齣口煙氣溫度分佈規律，提齣瞭在空氣預熱器入口設置非平衡換熱器，將煙道分隔為幾箇小煙道，通過適度地降低各箇小煙道的入口煙氣溫度，使鍋爐排煙溫度分佈趨于平衡併整體有所降低，最終達到進一步降低鍋爐排煙溫度的目的，提高鍋爐熱效率或機組熱效率。
침대회전식공기예열기적선전특성、저온부식도회특정이급출구연기온도분포규률，제출료재공기예열기입구설치비평형환열기，장연도분격위궤개소연도，통과괄도지강저각개소연도적입구연기온도，사과로배연온도분포추우평형병정체유소강저，최종체도진일보강저과로배연온도적목적，제고과로열효솔혹궤조열효솔。
Against the rotating characteristics,low temperature corrosion ash deposition perform-ance and outlet gas temperature distribution rule of the rotary air preheater,it suggests non-bal-ance heat exchanger be added at the air preheater inlet and the flue duct be divided into several small ones.By properly reducing the inlet gas temperature of each small flue duct,the boiler ex-haust temperature becomes equilibrium and decreases on a whole.Finally,the boiler exhaust tem-perature can be reduced and the boiler efficiency and unit heat efficiency can be enhanced.
