某生物质电厂引风机入口挡板结垢原因分析及解决对策

华电技术 ›› 2014, Vol. 36 ›› Issue (10): 67-70.

某生物质电厂引风机入口挡板结垢原因分析及解决对策

(1.中国电力工程顾问集团中南电力设计院，武汉〓430071； 2.安能(安陆)生物质热电有限公司，湖北安陆〓432600)

出版日期:2014-10-25 发布日期:2014-11-20

Analysis on scale formation on inlet baffle of induced draft fan in a biomass fuelfired power plant and solutions

(1.Central Southern China Electric Power Design Institute of China Power Engineering Consulting Group, Wuhan 430071, China; 2.Anneng (Anlu) Biomass Thermal Power Corporation Limited, Anlu 432600, China)

Online:2014-10-25 Published:2014-11-20

摘要/Abstract

摘要： 摘要：国内某生物质电厂引风机入口风门挡板结垢严重，导致挡板开度无法正常调节，从而无法调整锅炉负荷，影响机组的安全、稳定运行。通过对结垢物样品进行X射线光谱分析和X射线衍射分析，证明其是纯度很高的NH4Cl结晶体。通过对生物质燃料和土壤的成分分析，证明NH4Cl主要来自燃料中夹带的土壤。探讨了NH4Cl的生成条件，证明了挡板处烟气环境温度过低是造成挡板结垢的主要因素。通过引入一路热二次风至引风机入口风门挡板，以提高此处烟气环境温度，改善了挡板的结垢情况，解决了挡板门开度无法调整的问题。

关键词: 关键词：生物质电厂, 引风机, 挡板, 结垢, 氯化铵

Abstract: Abstract:There was serious scale formation in the inlet baffle of the induced draft fan of a domestic biomass fuelfired power plant, which caused the baffle opening can not be adjusted normally. So it is impossible to adjust the boiler load, and the unit can not operate safely and stably. The Xray spectrum analysis test and the Xray diffraction analysis test for the deposition were carried out, and the test results show that the deposition is NH4Cl crystalline with high purity. The components of the biomass fuel and the soil were analyzed, and the results show that the NH4Cl is mainly from the soil carried with the biomass fuel. The formation condition of the NH4Cl crystalline was discussed, and it was verified that the main factor causing scaling on the baffle is too low flue gas environmental temperature near the baffle. A hot secondary air flow was led into the inlet baffle of the induced draft fan, the flue gas environmental temperature was raised, and the scaling on the baffle was lightened. The baffle opening can be adjusted normally.

Key words: Keywords:biomass fuelfired power plant, induced draft fan, baffle, scale formation, ammonium chloride

韩炜1，毛军1，范海涛1，汪小林2. 某生物质电厂引风机入口挡板结垢原因分析及解决对策[J]. 华电技术, 2014, 36(10): 67-70.

HAN Wei1, MAO Jun1, FAN Haitao1, WANG Xiaolin2. Analysis on scale formation on inlet baffle of induced draft fan in a biomass fuelfired power plant and solutions[J]. Huadian Technology, 2014, 36(10): 67-70.

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