1、 I 摘 要 本文设计的是 410t/h 燃贫煤高压煤粉锅炉，其过热蒸汽压力为 9.8MPa，过 热蒸汽温度为 540，给水温度为 215。锅炉采用单锅筒，自然循环型布置 固态排渣。采用直吹式系统，四角切圆燃烧，直流燃烧器，重油点火。锅炉前部 为炉膛，四周布满膜式水冷壁，炉膛出口处布置屏式过热器，折焰角斜坡上有高 温对流过热器，水平烟道为低温对流过热器，且布置了两级喷水减温器，便于调 节蒸汽温度。尾部竖井部分交错布置两级省煤器和两级空气预热器。省煤器双侧 进水，空预器为双面进风的管式空预器。屏式过热器采用振动吹灰，对流过热器 采用蒸汽吹灰，尾部受热面采用钢珠吹灰。 关键词：贫煤；高压；自然循环
2、；四角切圆燃烧 Abstract This design is for 410t / h high-pressure lean coal boiler, whose superheated steams pressure is 9.8Mpa, superheated steams temperature is 540 , feed-waters temperature is 215 . The boiler is -type with single drum, and it uses natural circulation, direct-firing system, four corner
3、tangential combustion The front of the boiler is the furnace, which is full of water-colded walls. The superheater lays at the furnace exit, the high-temperature superheater is on the slope of furnace, the low-temperature superheater is at the horizontal flue, the tail-flue is furnished with two eco
4、nomizers and two air preheaters. The superheater sets vibration ash-removal equipments, the convection superheaters set steam ash-removal equipments ,the tail-heated surface sets steel ball ash-removal equipments. Keywords: lean coal, high-pressure, natural circulation, four corner tangential combustion III 目目 录录 引 言 1 1 文献综述 2 1.1 课题背景及意义. 2 1.1.1 课题背景 2 1.1.2 锅炉发展简史 2 1.1.3 我国电站锅炉发展概况 3 1.1.4 国外电站锅炉机组的发展 5 1.1.5 锅炉发展新技术 5 1.2 主要研究内容、应用价值、创新. 7 1.2.1 主要研究内容 7 1.2.2 应用价值 7 1.2.3 创新 7 1.
