浙江水利水电专科学校毕业论文（设计）

毕业论文

题 目：____发电厂输煤系统机务与电气常见问题检修

系 （部）： 电气工程系 专业班级： 姓 名： 学 号：

指导教师：

年 月 日

摘要

火力发电厂简称火电厂，是利用煤作为主燃料生产电能的工厂。它的基本生

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浙江水利水电专科学校毕业设计（论文）

产过程是：燃料在锅炉中燃烧加热水使成蒸汽，将燃料的化学能转变成热能，蒸汽压力推动汽轮机旋转，热能转换成机械能，然后汽轮机带动发电机旋转，将机械能转变成电能。

燃煤，用输煤皮带从煤场运至煤斗中。大型火电厂为提高燃煤效率都是燃烧煤粉。因此，煤斗中的原煤要先送至磨煤机内磨成煤粉。这个过程就需要一个完整可靠的输煤系统。而输煤系统会出现一些常见的机务与电气的问题，这就需要检修人员快速地处理缺陷，及时恢复输煤系统的正常运行，保证煤仓的煤量，提高发电可靠性。

文章介绍了滨海热电厂整个输煤系统，以及组成这个输煤系统的主要设备。分别罗列了电气和机务两方面产生的日常检修问题。对于这些问题的形成原因及检修方法作出相应地阐述。其中很多都是实习过程中碰到的，而且自己动手处理过的一些问题。

关键词

火力发电厂； 输煤系统； 电气问题； 机务问题； 检修

Abstract

Thermal power plant power plant referred to is the use of coal as the main energy

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浙江水利水电专科学校毕业设计（论文）

fuel production plant, which is the basic production process: fuel combustion in the boiler to heat water into steam, the fuel's chemical energy into heat, steam pressure to promote the turbinerotation, thermal energy into mechanical energy, and then rotating steam turbine driven generator, the mechanical energy into electrical energy.

Coal, with the conveyer belt to transport coal from the coal yard bucket. Large coal-fired thermal power plants to improve efficiency are Fired. Therefore, the coal scuttle coal first sent to the mill in the coal within the ground. This process requires a complete and reliable coal handling system. The coal handling system maintenance and some common electrical problems, which requires maintenance personnel to quickly deal with defects, timely recovery of the normal operation of coal handling system to ensure that the coal bunker, improve power reliability.

This paper introduces the coastal power plant coal handling system, and the composition of the coal handling system of the major equipment. Lists, respectively, both electrical and maintenance problems arising from the daily maintenance. The causes of these problems and repair methods elaborated accordingly. Many of which are encountered in the course of practice, and yourself some of the issues handled.

Keywords

Thermal power plant; coal handling system; electrical problems; maintenance problems; maintenance;

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浙江水利水电专科学校毕业设计（论文）

目录

摘要 .................................................................................................................................. 1 关键词 .............................................................................................................................. 2 Abstract ............................................................................................................................. 2 Keywords .......................................................................................................................... 3 目录 .................................................................................................................................. 4 1绪论 ............................................................................................................................... 6

1.1课题背景及意义 ................................................................................................. 6 1.2 本文主要工作 .................................................................................................... 6 2电厂输煤系统输煤流程 ............................................................................................... 7 3输煤系统的常见设备 ................................................................................................... 8

3.1输煤系统主要组成设备 ..................................................................................... 8

3.1.1 皮带输送机 .............................................................................................. 9 3.1.2驱动装置 ................................................................................................... 9 3.1.3托辊 ......................................................................................................... 10 3.1.4拉紧装置 ..................................................................................................11 3.1.5制动器 ......................................................................................................11 3.1.6落煤装置 ..................................................................................................11 3.1.7电动三通管 ............................................................................................. 12 3.1.8缓冲锁气器 ............................................................................................. 12

4常见机务设备检修 ..................................................................................................... 13

4.1机务设备检查通则 ........................................................................................... 13 4.2工作中常见的机务设备检修 ........................................................................... 13

4.2.1输送皮带的跑偏原因及检修方法 ......................................................... 13 4.2.2输送皮带纵向撕裂原因及检修方法 ..................................................... 14 4.2.3输送皮带打滑原因及检修方法 ............................................................. 14 4.2.4输煤系统堵煤原因及检修方法 ............................................................. 15 4.3实习中遇到的机务问题检修 ........................................................................... 15

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