300MW电站锅炉直流煤粉燃烧器系统设计+CAD图纸
毕业论文关键词： 水平浓淡；直流煤粉燃烧器；风量；热力计算
The Design Of 300MW Power Plant Boiler Pulverized Coal Burner System
Abstract: In our power industry, coal electricity accounts for about 3/4 of total power generation, and the power industry consumes about 2.9 tons of coal annually. The power coal in our country is often poor, and the coal quality is changeable. Common in the combustion is unstable combustion, especially due to the requirements on peak load regulation of power industry improve boiler under low load operation issues become more prominent. The content of this graduation thesis is to design 300MW power station boiler DC pulverized coal burner system. Firstly, by the industry analysis to the given coal, it is identified that the actual coal heat, the basic parameters of the boiler and theoretical air volume and flue gas volume, and then the fuel consumption in the furnace is determined therefore. Secondly, calculating the structure size of the furnace. By assuming volumetric heat load and sectional heat load, we can calculate the volume and cross -sectional area and the main body altitude of the furnace. And next according to the coal properties, preliminary select the type and arrangement of the burner. Finally choosing the appropriate milling system on the basis of the coal properties and the boiler capacity. When all the work above is finished, it is possible to calculate the output of the burner and the volume of primary air and secondary air. At this point we can determine the section size of the burner nozzle and the resistance of the burner definitively. The specific result is that the section sizes of of the burner nozzle of the primary air and secondary air are 0.153m2 and 0.327m2, and the height of the burner is 9.82m, and the duct resistance of the primary air and secondary air are 368.09Pa and 560.00Pa.
Keywords: The level of shade; Dc pulverized coal burner; Air volume; Thermodynamic calculations
目 录
摘要 Ⅰ
Abstract Ⅰ
目录 Ⅲ
1 绪论 1
1.1 新型燃烧器的发展 1
1.1.1 煤粉预燃室燃烧器 1
1.1.2 钝体燃烧器 2
1.1.3 多功能燃烧器 2
1.1.4 浓淡燃烧器 2
1.2 直流式燃烧器的特点和发展 3
1.2.1 直流煤粉燃烧器的作用 3
1.2.2 直流煤粉燃烧器的配风类型 3
1.3 燃烧器设计的思路和需要注意的问题 4
1.3.1 设计的主要思路 4