（毕业设计论文）《410t燃贫煤煤粉锅炉设计》.docVIP

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π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；四角切圆燃烧 Abstract This design is for 410t / h high-pressure lean coal boiler, whose superheated steam’s pressure is 9.8Mpa, superheated steam’s temperature is 540 ℃, feed-water’s temperature is 215 ℃. The boiler is π-type with single drum, and it uses natural circulation, direct-firing system, four corner 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 economizers 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 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc296685214 引 言 PAGEREF _Toc296685214 \h 1 HYPERLINK \l _Toc296685215 1 文献综述 PAGEREF _Toc296685215 \h 2 HYPERLINK \l _Toc296685216 1.1 课题背景及意义 PAGEREF _Toc296685216 \h 2 HYPERLINK \l _Toc296685217 1.1.1 课题背景 PAGEREF _Toc296685217 \h 2 HYPERLINK \l _Toc296685218 1.1.2 锅炉发展简史 PAGEREF _Toc296685218 \h 2 HYPERLINK \l _Toc296685219 1.1.3 我国电站锅炉发展概况 PAGEREF _Toc296685219 \h 3 HYPERLINK \l _Toc296685220 1.1.4 国外电站锅炉机组的发展 PAGEREF _Toc296685220 \h 5 HYPERLINK \l _Toc296685221 1.1.5 锅炉发展新技术 PAGEREF _Toc296685221 \h 5 HYPERLINK \l _Toc296685222 1.2 主要研究内容、应用价值、创新 PAGEREF _Toc296685222 \h 7 HYPERLINK \l _Toc296685223 1.2.1 主要研究内容 PAGEREF _Toc296685223 \h 7 HYPERLINK \l _Toc296685224 1.2.2 应用价值 PAGEREF _Toc296685224 \h 7 HYPERLINK \l _T