480th循环流化床锅炉飞灰特性的试验研究.doc

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480t/h 循环流化床锅炉飞灰特性的试验研究
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刘兴国1,张宗珩2,刘海玉1,金燕1**
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(1. 太原理工大学电气与动力工程学院,太原 030024;
2. 中煤平朔电力工程有限公司,朔州,036800)
摘要:本文以某电厂 480t/h 循环流化床锅炉为研究对象,通过试验探讨了给煤特性、总风量、
一次风量、风室压力对飞灰特性的影响,并对飞灰特性进行了微观分析。试验结果表明:飞
灰含碳量随粒径分布具有峰值特性,当飞灰粒径为 37μm 时,飞灰含碳量达到最大值。
100MW 负荷下,当省煤器出口氧量从 %增加到 %时,飞灰含碳量降低约 3%;一次风
量从 15×104Nm3/h 降低到 14×104Nm3/h 时,飞灰含碳量降低约 2%;风压从 8kPa 升高到
12kPa 时,飞灰含碳量降低约 4%。SEM 对飞灰表面结构和孔隙结构的表征结果表明:不同
粒径段飞灰孔隙特征具有渐变特性,与飞灰粒径及含碳量分布特性相吻合。
关键词:热能工程;循环流化床锅炉;运行参数;飞灰;粒径分布;孔隙结构
中图分类号:TK224
Experimental Study of the Fly Ash Characteristics of a
480t/h Circulating Fluidized Bed Boiler
LIU Xingguo1, ZHANG Zongheng2, LIU Haiyu1, JIN Yan1
(1. College of Electricity and Power Engineering, Taiyuan University of Technology, Taiyuan
030024;
2. China Coal Pingshuo the First Coal-gangue-fired pany Limited, Shuozhou 036800)
Abstract: This paper takes a circulating fluidized bed boiler in capacity of 480t/h as the object. By
experiments the author studies the effect of the operating parameters on the characteristics of the
fly-ash, such as the coal properties, the total amount of air, the primary air, the wind chamber
pressure. The microcosmic characteristics of the fly-ash are also explored with the help of SEM.
The experimental results show that the carbon content in fly ash has a peak according to their
diameters. The carbon content in fly ash reaches