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案例频道★郭有福（河北大唐国际张家口热电有限责任公司，河北 张家口 075000）
摘要：燃煤机组目前多采用还原剂进行烟气进行脱硝，存在氨逃逸的现象，导致硫酸氢氨的形成。硫酸氢铵在空预器的低温区域会液化，受低热值、高灰分煤的影响，造成空预器的局部堵塞。空预器局部堵塞会导致锅炉燃烧特性变化，体现在炉膛负压跟随变化。空预器利用蒸汽吹灰，较好地消除空预器积灰。本文以吹灰器周期与空预器的转速偏差分析，以吹灰压力进行分解计算，验证空预器堵塞现象和解决方案。
关键词：空预器堵塞；转速偏差；燃烧特性
Abstract: At present, reducing agent is often used in flue gas denitrification of coal-fired units, which leads to the formation of ammonia bisulfate. Ammonium bisulfate will be liquid in the low temperature area of air preheater, which will lead to blockage of air preheater due to the influence of low calorific value and high ash coal. The local blockage of air preheater will lead to the change of boiler combustion characteristics, which is reflected in the change of furnace negative pressure. The ash deposition of air preheater can be eliminated by steam soot blowing. In this paper, the cycle period of soot blower and the speed deviation of air preheater, and the soot blowing pressure are used for decomposition calculation to verify the blockage phenomenon and solution of air preheater.
Key words: Blockage of air preheater; Speed deviation; Combustion characteristicer
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空预器堵塞引起锅炉特性变化的分析.pdf
摘自《自动化博览》2021年7月刊
北京市公安局海淀分局备案号：11010802023656号