本科毕业设计__300mw煤粉炉高温受热面的腐蚀与防护本科.doc

毕业设计论文 姓 名： 张皓 学 号： 1201100145 学 院： 吉林电子信息职业技术学院 专 业： 热能动力工程 题 目： 300MW煤粉炉高温受热面腐蚀与防护 指导教师： 皮林江 高级工程师 (姓 名) (专业技术职务) 2014年 6月 摘 要 能源是国民经济的重要物质基础，我国的电站锅炉主要以燃煤为主，随着火力发电厂大容量、高参数机组的投运，热力设备的腐蚀与防护问题越来越受到重视。因此，做好防腐蚀工作，对电厂来说具有重要意义。 本设计通过研究大连华能电厂300MW煤粉炉高温受热面腐蚀（高温腐蚀，应力腐蚀，汽侧腐蚀）问题，发现腐蚀后其面积减小。进而进行过热器腐蚀前后的热力计算及比较，总结经验。并通过检测样品，发现问题产生的原因，并找到解决的方案。 本设计探讨热力设备腐蚀与防护的目的是利用金属腐蚀的原理，分析热力设备的各种腐蚀形态特点，产生条件，以便提出有效的防止方法，减少不必要的事故和损失，为锅炉工业的发展服务。 关键词：煤粉炉，腐蚀，过热器，热力计算 Title: Analysis of 300MW boiler high thgh temperature heating surface corrosion and superheater thermodynamic calculation ABSTRACT Energy is an important material basis for the national economy, Chinas main coal-fired utility boilers mainly with large-capacity thermal power plant, high parameter units put into operation, thermal equipment corrosion and protection issues more and more attention. Therefore, to do anti-corrosion work on the plant is of great significance.  In this paper, Huaneng Dalian Power Plant by calculating the rated operating conditions the heat Superheater calculated, and then by studying the heating surface corrosion (hot corrosion, stress corrosion, steam side corrosion) found that heating surface area is reduced, after conducting corrosion thermal calculation, and compare its rated operating conditions, summarized harm. By testing samples and found the problem why, and find solutions.  Objective: To investigate the thermal equipment corrosion and protection of the objective is to use the principle of metal corrosion, analysis of thermal equipment features a variety of corrosion patterns, conditions in order to propose effective ways to prevent and reduce unnecessary accidents and loss of industrial development for the boiler service. Keywords: Boiler，Corrosion， Superheater，Thermal calculation目 录 摘要 I ABSTRACT II 1.1 选题背景及研究意义 1 1.1.1 燃煤锅炉在电力工业中的重要地位 1 1.1.2 燃煤锅炉中的高温受热面 2