300MW电站锅炉旋流煤粉燃烧器系统设计+CAD图纸
时间:2018-11-11 14:57 来源:毕业论文 作者:毕业论文 点击:次
| 摘要：随着国民经济和电力负荷的迅速增长，电网容量也随之增加，我国越来越多的采用大容量、高参数机组锅炉。燃烧器作为煤粉锅炉燃烧设备的主要组成部分，它的性能好坏对燃烧的稳定性和经济性有很大的影响。本次毕业设计的是300MW电站锅炉旋流煤粉燃烧器系统，论文首先通过对所给煤种进行的工业分析，确定了煤种实际的发热量、锅炉的基本参数、理论空气量和烟气量，并最终确定了炉膛燃料消耗量等；然后，计算炉膛的结构尺寸，先假定炉膛的容积热负荷和截面热负荷，计算出炉膛的容积和截面积以及炉膛的主体高度，并根据煤种特性来初步选定煤粉燃烧器的类型和布置方式，针对燃烧煤种和锅炉容量选择合适的制粉系统；最后，计算燃烧器的出力，确定一、二次风的风量，在此基础上，最终确定出燃烧器的喷口截面尺寸。30116 毕业论文关键词：电站锅炉；旋流；燃烧器；设计 Design of 300MW power plant boiler swirl pulverized coal burner system Abstract: With the rapid growth of national economy and power load, power grid capacity also will increase, our country more and more large capacity and high parameter boiler unit. Burner as the main part of pulverized coal boiler combustion equipment, its performance is good or bad for combustion stability and economy has a great influence. This graduation design is a 300mw power plant boiler swirl pulverized coal burner system, the paper first through to the coal industrial analysis given, determine the actual calorific value of coal, boiler, theoretical air volume and the parameters of the smoke gas, and ultimately determine the furnace fuel consumption, etc. Then, the calculation of the furnace structure, size and presuppose that furnace volume heat load and the cross section of heat load, calculate the volume and the cross-sectional area of the furnace, and the main body of the height, and preliminary selected according to the characteristics of coal pulverized coal burner type and arrangement, for burning coal pulverizing system and boiler capacity choosing appropriate; Finally, the calculation of the burner, to determine the primary and secondary air volume of wind, on this basis, the final out of the burner nozzle section size and the resistance of the burner. Keywords: Power plant boiler; cyclone; The burner; design 目录 摘要 i Abstract i 目录 ii 1 绪论 1 1.1 旋流燃烧器的分类 2 1.1.1 双蜗壳型旋流燃烧器 2 1.1.2 单蜗壳型旋流燃烧器 2 1.1.3 叶片型旋流燃烧器 2 1.2 旋流式燃烧器的特点和发展 3 1.3 新型燃烧器的发展 4 1.4 燃烧器设计的思路和需要注意的问题 5 2 燃料性质和燃烧计算 6 2.1 基本资料和燃料分析 6 2.1.1 煤种特性 6 2.1.2 燃料的数据校核和煤种判别 7 2.2 燃料燃烧的计算 7 2.2.1 理论空气量和理论烟气量 8 2.2.2 烟气特性 8 2.2.3 排烟温度的选择 9 2.2.4 热空气温度的选择 10 2.2.5 锅炉热平衡计算 11 2.3 小结 11 3 炉膛型式及燃烧方式的确定 12 (责任编辑：qin) |