循环流化床锅炉飞灰可燃物高诊断及燃烧优化调整

2019-07-13 09:40:56王承亮
科技创新导报 2019年11期

王承亮

摘 要:针对某电厂循环流化床锅炉飞灰可燃物偏高的现状,组织进行了现场诊断分析,并根据分析情况,提出了针对性优化改进建议;同时,结合现场实际设备条件,根据优化调整建议,组织实施了锅炉燃烧优化调整试验,飞灰可燃物明显降低,取得了非常显著的节能效果,也为循环流化床燃烧优化调整积累了经验。

关键词:火电厂 燃烧优化 飞灰可燃物 循环流化床

中图分类号:TM62 文献标识码:A 文章编号:1674-098X(2019)04(c)-0058-04

Abstract: In view of the present situation of high combustibles in fly ash of a circulating fluidized bed boiler in a power plant, field diagnosis and analysis were organized, and suggestions for optimization and improvement were put forward based on the analysis. Meanwhile, according to the actual equipment conditions on site and put forward the suggestions for optimization and adjustment, the optimization and adjustment test of boiler combustion was organized and carried out, and the combustibles in fly ash were obviously reduced, and remarkable energy-saving effect was achieved. As a result, experience has been accumulated for optimization and adjustment of circulating fluidized bed combustion.

Key Words: Power plant; Combustion optimization; Combustibles in fly ash; Circulating fluidized bed

某單位循环流化床锅炉一直存在飞灰可燃物偏高问题,现场技术人员也进行了试验摸索,虽然取得了一定的效果,但仍然偏高较多,严重影响了机组经济运行[1],为企业经营带来了一定的压力。为进一步解决此问题,电厂组织技术研究团队进行了系统的诊断分析,包括存在的问题、原因分析和整改建议等;同时根据现场设备实际情况,组织进行了燃烧优化调整试验,飞灰可燃物明显降低,取得了非常显著的节能效果。

1 锅炉基本性能

采用单汽包自然循环、集中下降管,高温超高压一次中间再热,高温绝热旋风分离器、平衡通风、前墙给煤、岛式半露天布置,全钢结构,炉顶设置轻型钢屋盖。配南京汽轮机厂150MW高温超高压一次中间再热抽凝汽式汽轮发电机组。

(1)锅炉规范。

锅炉型号:SG-490/13.8-M572型锅炉;锅炉型式:高温超高压、一次中间再热、自然循环、平衡通风、循环流化床锅炉。

(2)锅炉主要热力特性。

锅炉主要热力特性设计参数详见表1。

不投油最低稳燃负荷:燃用设计煤种,Ca/S摩尔比保持设计值,煤、石灰石粒度达到设计值,不投油最低稳燃负荷为30%B-MCR。……

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