米东热电厂1069t_hCFB锅炉在热电联产中的运用及运行中的问题

范文编号:RN036  范文字数:8187,页数:23

范文题目：米东热电厂1069t/h CFB锅炉在热电联产中的运用及运行中的问题
摘　要
 CFB锅炉是近几年在我国发展起来的一种新型燃烧设备，而循环流化床燃烧技术的发展以其高效率低污染的高性能更是突飞猛进。在环保要求日趋严格的今天，CFB锅炉已成为当前最有前途的燃烧设备，但是CFB与其它锅炉相比，磨损比较严重。
 循环流化床锅炉受热面磨损是对循环流化床锅炉正常运行三大威胁(磨损、给煤不畅、排渣困难)之一，由于磨损（受热面、耐火材料、风帽等）造成的停炉事故接近停炉总数的50%。在很长时间内成为影响循环流化床锅炉推广应用的主要障碍。
 磨损在工程上常被理解为由于机械原因产生的颗粒剥离脱落引起的材料表面所不希望的逐渐变化，如减薄，开裂。锅炉常见的磨损即高速的灰粒子从不同的角度冲刷碰撞炉墙或受热面而引起的种种变化。有资料介绍，磨损量与烟速的三次方成正比，并随灰粒子的浓度增大而增大。单从理论上讲，降低磨损应从降低烟气流速，减小灰粒子浓度和减小粒子的颗粒直径入手。
 本范文通过对循环流化床锅炉运行中存在的冷渣器、返料器工作异常和磨损方面问题的分析、处理，提出了循环流化床锅炉炉膛水冷壁管磨损机理和防磨措施，并针对国产循环流化床锅炉提出了几个预防磨损的值的注意的问题，对循环流化床锅炉在运行中加强管理起到一定的帮助。
   
 关 键 词：CFB锅炉；运行中的问题；磨损；环保
 
 范文类型：应用基础
 
  
 Title: The Midong thermal power plant 1069t/h CFB boiler in cogeneration of use and of operational problems
ABSTRACT
 CFB boiler is in recent years in our country developed a kind of new burning equipment, while circulating fluidized bed combustion technology development with its high efficiency low pollution and high performance is improved by leaps and bounds. In the environmental protection request strictly today, CFB boiler has become the most promising combustion equipment, but compared with other CFB boiler, wear is more serious.
 Circulating fluidized bed boiler wear is the normal operation of circulating fluidized bed boiler three threat (wear, coal feeding, flawed slag discharge difficult), because wear (one of the heating surface, header refractories, cap) causes of the boiler stop accident near boiler stop 50% of the total. In a very long time become influence circulating fluidized bed boiler popularization and application of the main obstacle.
 Wear in engineering is often understood as due to mechanical causes of particle stripping off the material surface caused by didn't want a gradual change, such as thinning, craze. Boiler common wear namely high-speed ash particles from different angles scour collision heating furnace wall or caused by all kinds of changes. Has the material wear is introduced, and the smoke 3.22 times speed is proportional to the square, and with the increase of concentration of grey particles lattar. Single theoretically, to reduce wear be lowered flue gas velocity, decreasing ash particle concentration and reduce the grain diameter of particles.
 This paper on circulating fluidized bed boiler in the operation of cold dregs device, the return of view of the abnormal and wear under the analysis of the problems, processing, puts forward the circulating fluidized bed boiler hearth of water-wall tubes wear mechanism and prevent grind, and measures of domestic circulating fluidized bed boiler put forward some prevention to wear the attention of the value of the problems of circulating fluidized bed boiler in operation of strengthening management have some help.

KEY WORDS: CFB boiler, Of operational problems,Wear, Environment protection

TYPE OF THESIS: Application foundation
 

目  录
摘　要 I
ABSTRACT III
目  录 V
1 前言 1
2 锅炉设备概况及有关参数 3
2.1 锅炉设备概况 3
2.2 设计参数 4
2.3 设计燃料特性 4
3 运行中存在的一些问题 5
3.1 床温和床压的调整 5
3.1.1 床温的调整 5
3.1.2 床压的调整 5
3.2 连续运行时间短的问题 5
3.2.1 水冷滚筒式冷渣器存在的缺陷 5
3.2.2 锅炉实际燃煤与设计燃煤偏差大，颗粒度控制不好 6
3.2.3 “J”阀结焦问题 6
3.2.4 流化床床面结焦 7
3.2.5 磨损方面的问题 7
4 循环流化床锅炉实行热电联产的环保效益 11
4.1 污染物排放量的减少 11
4.2 燃烧产物的综合利用 11
5 结论 13
致    谢 15
参考文献 17
附    录 19

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