毕业设计(论文)
新海发电厂330MW 火电机组制粉系统初步设计
The Pulverizing System Preliminary Design Of The Extend 330MW
Thermal Electric Generation
Unit In Xinhai Power Generation Corporation
学生姓名: 王建超 学 历: 本 科 专业名称: 热能与动力工程 班级名称: 热动 0942 学 号: 0903411229 指导教师: 张志正 教师职称: 教 授 完成时间: 2013.6.10
长 春 工 程 学 院
摘 要
制粉系统是热力发电厂不可缺少的一部分,锅炉煤粉制备系统是将磨煤机磨制成一定粒度的煤粉并输送至锅炉进行燃烧的所有设备组成的系统。
此次毕业设计的题目:江苏新海电厂扩建330MW火电机组制粉系统初步设计。毕业设计的内容是确定制粉系统的形式,根据不同的煤种应选用适合的磨煤机类型。根据江苏新海电厂扩建330MW机组工程锅炉容量和燃用煤种,通过计算来选择和设计制粉设备与制粉系统,根据磨煤出力选择磨煤机,进行局部阻力和沿程阻力计算,干燥剂和风机容量的计算,通过制粉系统空气动力计算进行风机选型。并根据选择结果画出燃烧系统图和设备布置图。
制粉系统设计的主要任务是合理选择制粉系统及其各种辅助设备和部件,进行管道的合理布置设计以及进行整个系统和设备参数计算,使制粉系统能适应煤的特性,具有良好的运行性能和技术指标。因此,制粉系统的设计在整个热力发电厂设计的过程中有着重要地位。
关键词
制粉设备 制粉系统 磨煤机 设备选型
Abstract
Pulverizing system is an indispensable part of the thermal power plants, the preliminary design of the power plant pulverizing system is an important element in the design of power plant production.
The graduate design topics: Jiangsu Xinhai Power Plant Expansion 330MW thermal power unit pulverizing system preliminary design. 330MW units project Jiangsu Xinhai Power Plant Expansion boiler capacity and fueled with coal, by calculating the selection and design of milling equipment and milling system, coal mill grinding coal output options, local resistance and calculating frictional resistance, dry agents and fan capacity is calculated by the aerodynamics of the milling system fan selection. Depending on the selection, draw a diagram of the combustion system and equipment layout.
The main task of the milling system design is a reasonable choice pulverizing system and its various auxiliary equipment and components, pipeline reasonable layout design, as well as the entire system and device parameters of calculation so that the milling system can adapt to the characteristics of coal, has a good run the performance and technical indicators.
Keyword:
Milling equipment milling systems mill equipment selection
目 录
前 言 ................................................................................................................................... 1 第一章 概述 ..................................................................................................................... 2 1.1 设计任务 ................................................................................................................... 2 1.2 原始资料 ................................................................................................................... 2 1.3 设计思路 ................................................................................................................... 4 1.4 设计方法 ................................................................................................................... 5 第二章 煤种燃煤量的确定 ............................................................................................. 6 2.1 煤质的燃烧计算 ....................................................................................................... 6 2.2 锅炉的燃烧量的确定 ............................................................................................... 7 第三章 磨煤机选型及制粉系统形式的确定 ................................................................. 9 3.1 根据燃料量确定磨煤机出力及台数的确定 ........................................................... 9 3.2 根据出力选择磨煤机及制粉系统类型的选择 ....................................................... 9 3.3 校核出力 ................................................................................................................... 9 第四章 制粉系统热力计算 ............................................................................................11 4.1 初始干燥剂量的确定 ..............................................................................................11 4.2 干燥剂初温的确定 ................................................................................................. 12 4.3 干燥剂的组成成分 ................................................................................................. 15 4.4 干燥剂核算出力及风机容量确定 ......................................................................... 16 第五章 制粉系统管道设计计算 ................................................................................... 18 5.1 一次风管 ................................................................................................................. 18 5.2 二次风管道 ............................................................................................................. 25 5.3 一次风机进出口管道计算 ..................................................................................... 27 5.4 密封风管管道计算 ................................................................................................. 28 第六章 制粉系统的空气动力计算和风机的选择 ....................................................... 30 6.1 直吹式制粉系统一次风道的阻力计算 ................................................................. 30 6.2 .直吹式制粉系统送分管道空气动力计算 ............................................................ 42 6.3 送风机管道及局部阻力计算 ................................................................................. 43
6.4 风机选型 ................................................................................................................. 53 第七章 制粉系统其他辅助设备的选择 ....................................................................... 56 7.1 原煤仓的选择与计算 ............................................................................................. 56 7.2 给煤机的出力计算和选型 ..................................................................................... 56 7.3 粗粉分离器的选择 ................................................................................................. 57 7.4 木块分离器与木削分离器的选择 ......................................................................... 57 7.5 煤粉分配器的选择 ................................................................................................. 57 7.6 补偿器选择 ............................................................................................................. 57 第八章 制粉系统总体概述 ........................................................................................... 59 设计总结 ............................................................................................................................. 62 致 谢 ............................................................................................................................. 64 附录 ..................................................................................................................................... 65