75吨循环流化床锅炉工况优化初探讨（含外文翻译） 毕业论文.docVIP

摘要 循环流化床锅炉是近二十年我国发展起来的一种新型的燃烧设备。与其他燃煤方式的锅炉相比其具有高效、低污染、清洁燃烧等特征,决定了它的发展空间非常巨大。总体来说,循环流化床锅炉具有燃料适应性广、负荷调节性能好、灰渣易于综合利用等优点,而且低温燃烧、床层反复脱硫导致低NOX、SO2排放,燃料多次循环促使炉内湍流运动强烈,燃烧效率接近煤粉燃烧,因此在国际上得到迅速的商业推广。我国目前的环保要求日益严格,在电厂的负荷调节范围较大、煤种多变、原煤直接燃烧比例高、燃煤与环保的矛盾日益突出的情况下,循环流化床燃烧技术已经为首选的高效率低污染的新型燃烧技术。 但是循环流化床锅炉与其它锅炉相比，磨损比较严重。循环流化床的锅炉中，有许多部件是在高固体颗粒浓度的不断冲刷环境下工作的。这些部件的磨损问题日益突出，严重影响了锅炉机组的安全经济运行。 本文根据循环流化床锅炉的燃烧特性，对循环流化床锅炉的磨损及其布风装置、炉膛水冷壁、炉内各受热面、尾部受热面等方面采用的防磨措施进行了初步的探讨。 关键词：循环流化床锅炉；受热面；磨损；防磨 Abstract CFB boilers are nearly 20 years of Chinas development up a new types of combustion equipment. And other forms of coal-fired boilers to its efficient, clean, clean combustion characteristics, decided its huge space for development. Generally speaking, the CFB boilers with fuel adaptability, load regulation performance and Ash Comprehensive Utilization of the advantages of easy, and low-temperature combustion, repeatedly bed desulfurization leads to low NOx, SO2 emissions, fuel cycle repeated campaigns to promote strong turbulence furnace, combustion efficiency close to pulverized coal combustion, Therefore the international community promote rapid commercial. China currently has increasingly stringent environmental requirements in the plant load adjustment is large coal volatile, the proportion of direct combustion of coal is very large, coal and environmental protection are increasingly conspicuous circumstances, Circulating fluidized bed combustion technology has been the first choice for the high efficiency of new and cleaner technology. However, circulating fluidized bed boiler compared with others, more serious wear. CFB boilers, many parts of the high concentration of solid particles in the constant erosion of the working environment. These components wear problems have become increasingly prominent, seriously affecting the boiler safety and economic operation. According to the circulating fluidized bed boiler combustion characteristics of CFB boilers and wear cloth device. Wall furnace, the fur