循环流化床锅炉运行中的问题及解决方法浅析

论文编号:RN026  论文字数:13273,页数:32

论文题目：循环流化床锅炉的运用及运行中的问题
摘　要
 循环流化床锅炉是八十年代发展起来的高效率、低污染和良好综合利用的燃煤技术，由于它在煤种适应性和变负荷能力以及污染物排放上具有的独特优势，使其得到迅速发展。循环流化床锅炉的原理及其脱硫工艺等加工技术的发展，带来了社会效益和经济效益。
 本文介绍了循环流化床锅炉的一般结构；从低温燃烧，高浓度、高强度、高通量的固体物料流态化循环过程几个方面阐述了循环流化床锅炉的技术特点；通过燃烧效率、脱硫率、氮氧化物排放量、燃料适应性广等方面的介绍说明循环流化床锅炉的优点；同时介绍了循环流化床锅炉的燃烧机理。最后着重分析了循环流化床锅炉运行中出现的诸如给煤不畅、炉内受热面磨损、回料器回料不畅、排渣困难等问题的原因、危害及解决办法等方面的内容。
 
 
 关 键 词：循环流化床  锅炉  运用  运行问题
 
 论文类型：c
 
  Title: The application of CFB boiler & the problems when course
ABSTRACT
 Circulating Fluidized Bed boiler is one of the high-efficient, low-pollution & general using technology, it has developed since 1980s, because its’ unique superiority with adapting more kinds of coal & strong changing burthen ability & low pollutant egesting, so the CFB boiler developed very fast. The development of elements and the procedure to decoke for CFB boiler bring benefit for society and economy.
 This article introduces the normal structure of CFB boiler; Meanwhile expound the CFB boiler’s technique trait such as low-temperature burn, solid materiel fluidized circulating accompany high thickness & high intensity & high flux. This article also explain the CFB boiler’s merit, for example, burning efficiency, to decoke efficiency, NOX eduction, adapting more kinds of coal; And introduce the CFB boiler’s burning elements; At the last, the article emphasize the problems while CFB boiler working, such as not expedite of supply coal, heat surface abrasion, not expedite of withdrawal coal with withdrawal equipment, difficult for outlet dreg, and study the reasons of these problems & the disserve of these problems, giving the solve method.

KEY WORDS: CFB  Boiler  Application 

TYPE OF THESIS: c

 
目  录
摘　要 III
ABSTRACT V
目  录 VII
1 绪论 1
2 循环流化床锅炉的结构 3
3 循环流化床锅炉的技术特点 7
3.1 低温的动力控制燃烧 7
3.2 高速度、高浓度、高通量的固体物料流态化循环过程 7
3.3 高强度的热量、质量和动量传递过程 7
4 循环流化床锅炉的优点 9
4.1 燃料适应性广 9
4.2 燃烧效率高 9
4.3 脱硫率高 9
4.4 氮氧化物排放低 9
4.5 受热面不易出现结焦现象 10
4.6 易于实现灰渣综合利用 10
4.7 床内不布置埋管受热面 10
4.8 燃料预处理系统简单 10
5 循环流化床锅炉内的燃烧加工过程 11
5.1 循环流化床锅炉内煤的燃料着火 11
5.2 循环流化床锅炉内煤的破碎特性 11
6 循环流化床锅炉运行中存在的一些问题 13
6.1 给煤不畅 13
6.1.1 给煤不畅的危害 13
6.1.2 给煤不畅的解决办法 13
6.2 炉内受热面磨损 13
6.2.1 影响受热面磨损的主要因素 17
6.2.2 炉内受热面磨损的危害 17
6.2.3 炉内受热面磨损的解决办法 18
6.3 回料器回料不畅 19
6.3.1 回料器回料不畅的原因 19
6.3.2 回料不畅的危害 20
6.3.3 回料不畅的解决办法 20
6.4 排渣困难 20
6.4.1 排渣困难的原因 20
6.4.2 排渣困难的危害 20
6.4.3 排渣困难的解决办法 21
7 结论与展望 23
致    谢 25
参考文献 27