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在四十年代中电站装置一般均用60公斤/厘米~2的蒸汽循环,蒸汽吹灰被广泛采用。从汽鼓中直接接出的饱和蒸汽对于良好的渣灰系统是足够合适的。只有锅炉的侧墙、过热器和省煤器段是需要清扫的受热面。吹灰系统的管道也很简单,只要考虑到管道膨胀和锅炉本体的微量移动也就成了。大多数锅炉是采用管式空气预热器;装上一些烟挡板和傍路装置用以提供提高尾部温度的手段就能防止尾部堵塞,由于湿汽造成堵塞的可能性是可以大大减低的。但在五十和六十年代,一次和二次再热循环出现了;汽压升高到105公斤/厘米~2,甚至进入超临界范围。随同压力和温度的提高,锅炉的容量也逐步增大。炉墙水冷壁,过热器、再热器和省煤器的受热面也大为增加。空气预热器改为再生式(回转式)设计,它由狭缝隙
In the forties power plant installations are generally used 60 kg / cm ~ 2 steam cycle, steam soot blowing is widely used. Saturated steam drawn directly from the drum is adequate for a good ash system. Only the boiler's side walls, superheater, and economizer sections are the heated surfaces to be cleaned. Soot blowing system piping is also very simple, as long as the pipe expansion and the boiler body will also take a small amount of movement has become. Most boilers use tubular air preheaters; the addition of a number of smoke baffles and abutments to provide the means to increase the temperature of the tail prevents clogging of the tail, which can be substantially less likely to clog due to moisture. However, in the 1950s and 1960s, primary and secondary reheat cycles appeared; the vapor pressure increased to 105 kg / cm 2 and even into the supercritical range. With the pressure and temperature increase, the capacity of the boiler is also gradually increased. Wall heating wall, superheater, reheater and economizer heating surface is also greatly increased. Air preheater to regenerative (rotary) design, which consists of slit gap