每小时620吨燃煤锅炉烟气的除尘系统设计
毕业论文关键词：燃煤锅炉；电除尘器；除尘系统
The Design of Flue Gas Dust-removal System for 620 t/h Coal-fired Boiler
Cai Yiyi
Tutor: Li Guangchao
Abstract: The type and parameters of boiler are compared and selected according to the given capacity of coal-fired boiler. The coal consumption, flue gas, dust concentration of flue gas respectively are calculated according to the type of coal and evaporation quantity of the boiler. Dust removal efficiency are calculated according to the flue gas emissions limit. Electrostatic precipitator is chosen as the type of dust collector and the size of the electrostatic precipitator is designed. The diameter of ventilation pipeline is determined according to the flue gas and pipeline flow velocity of flue gas. Fan model is chosen by calculating air pressure and air volume of induced draft fan. And then the height and other measurements of the chimney can be designed.
Keywords: Coal-fired boilers; Electrostatic precipitator; Dust-removal System
目录
1 引言 1
1.1 概述 1
1.2 本课题目前的研究状况及水平 1
2 设计说明 2
2.1 设计内容 3
2.2 锅炉的分类 3
2.3 锅炉的确定 4
3 除尘设备概述 4
3.1 除尘器分类 4
3.2 除尘器性能指标 5
3.3 各类除尘器特点与使用范围 6
4 除尘设备的选型与设计 7
4.1 耗煤量、烟气量及含尘浓度的计算 7
4.1.1 耗煤量 7
4.1.2 燃煤锅炉烟气量计算 7
4.1.3 烟气含尘浓度 10
4.2 除尘系统工艺流程设计 10
4.2.1 除尘器的确定 10
4.2.2 除尘系统工艺流程 10
4.3 电除尘器的设计 11
4.3.1 电除尘器分类 11
4.3.2 电除尘器选型确定 11
4.3.3 电除尘器的基本设计参数确定及其计算 11
4.4 除尘管道计算 18
4.4.1 除尘管道直径计算 18
4.4.2 管道中压力损失 18
4.5 风机选型 21
4.5.1 引风机风量 21
4.5.2 引风机风压 21
4.6 烟囱的设计 21
4.6.1 烟囱高度 21
4.6.2 烟囱的出口内径 22
4.6.3 烟囱底部直径 22
5 主要部件图 22
6 总结 23
参考文献 26
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