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燃煤锅炉低温受热面积灰特性实验研究

DOI: 10.13334/j.0258-8013.pcsee.2015.S.016, PP. 118-124

Keywords: 燃煤锅炉,低温受热面,余热利用,积灰

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Abstract:

通过煤灰的物理化学特性分析和冷态实验研究了煤灰冲刷光管和H型翅片管的沉积特性。实验结果表明:煤灰的微观特性是影响灰在受热面上沉积形成干松型积灰的主要因素。随着空气流速的增加,灰在光管上的沉积量减小;随着灰浓度的增加,灰在光管上的沉积量逐渐增加。灰颗粒在管束上形成干松灰的区域主要集中在翅片管的迎风面和背风面的低速区。在燃煤锅炉低温受热面时建议采用顺列布置的翅片间距较小的翅片管,以获得较高翅化系数和较小的烟风阻力。研究为燃煤锅炉低温受热面的设计和优化提供了实验参考。

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