(精品)蒸汽锅炉电气控制系统设计说明书

本科生毕业设计说明书

题目：蒸汽锅炉电气控制系统设计

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专业：自动化

班级：自动化

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蒸汽锅炉电气控制系统设计

摘要

蒸汽锅炉是石油、电力、化工等行业中重要的动力设备。当今社会资源紧张，环境破坏日益严重，因此锅炉作为将一次能源转化为二次能源的设备，在集中供热过程中起着极其重要的作用，应不断提高对其的控制与管理水平，进而提高能源的利用率，减少对环境的破坏。

锅炉系统复杂而庞大，对其各个部分进行合理控制在实际应用中具有极其重要的意义，而汽包液位控制和锅炉燃烧控制在锅炉的整体控制中显得尤为重要。本文对锅炉汽包液位进行数字监控和光柱式显示，要保证锅炉安全运行，其中很主要的一个因素是要保证汽包水位在一个合适的范围内。过高的水位会使锅炉锅炉中产生的蒸汽带水增多，使汽包出口的蒸汽带水量增加；而水位过低可能导致锅炉缺水，使得循环管局部过热而爆裂。进而采用变频器变频调速控制和工频控制相互结合的电气控制方式实现了锅炉液位的自动控制。

关键词：蒸汽锅炉，汽包液位，变频器，电气控制

Electric Steam Boiler Control System Design

Abstract

Steam boiler is oil, important power equipment in electric power, chemical industry, etc. In today's society resources nervous, serious environmental damage, so the boiler as an energy can be converted to secondary energy equipment, in the central heating plays a vital role in the process, should constantly improve the control and management level, and improve energy utilization rate, reduce the damage to the environment.

Complex and large boiler system, the parts were reasonable control is of great significance in the practical application, and the drum level control in boiler and boiler combustion control is particularly important in the control of the whole. Numbers in this paper, the boiler steam drum level monitoring and the lamp type, to ensure the safe operation of the boiler, and one is the main factors is to ensure that the steam drum water level in a suitable range. High water level of boiler in the boiler causes increase in the number of steam with water, increase the export of steam drum with water; And low water level may result in the boiler water shortage, make circulating pipe local overheat and burst. And then USES the way of the electrical control system of inverter, industrial computer in combination with each other the boiler liquid level automatic control is realized.

Key words:Steam boiler, steam drum level, frequency converter, electric control

目录

摘要 .................................................................................................................... I Abstract ................................................................................................................. II 第一章引言 . (1)

1.1 锅炉的应用及研究背景 (1)

1.2 变频器的应用 (1)

1.2.1 变频调速的优点 (1)

1.2.2 变频调速在电机控制方面的优势 (2)

1.2.3变频器以提高工艺水平和产品质量为目的的应用 (2)

第二章蒸汽锅炉生产工艺及控制任务 (3)

2.1 蒸汽锅炉的组成和工作过程 (3)

2.1.1 蒸汽锅炉的构造 (3)

2.1.2 蒸汽锅炉的工作过程分析 (5)

2.2 锅炉控制的任务和特点 (6)

2.2.1 锅炉控制的任务 (6)

2.2.2 给水自动控制 (7)

2.2.3 锅炉燃烧过程控制 (9)

第三章锅炉燃烧控制系统设计 (12)

3.1 锅炉燃烧控制系统的组成 (12)

3.1.1 汽包水位控制系统 (12)

3.1.2 炉膛压力、温度控制系统 (13)

3.2 锅炉控制系统方案的确定 (14)