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案例頻道★郭有福（河北大唐國際張家口熱電有限責任公司，河北 張家口 075000）
摘要：燃煤機組目前多采用還原劑進行煙氣進行脫硝，存在氨逃逸的現象，導致硫酸氫氨的形成。硫酸氫銨在空預器的低溫區域會液化，受低熱值、高灰分煤的影響，造成空預器的局部堵塞。空預器局部堵塞會導致鍋爐燃燒特性變化，體現在爐膛負壓跟隨變化。空預器利用蒸汽吹灰，較好地消除空預器積灰。本文以吹灰器周期與空預器的轉速偏差分析，以吹灰壓力進行分解計算，驗證空預器堵塞現象和解決方案。
關鍵詞：空預器堵塞；轉速偏差；燃燒特性
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
點擊預覽：
空預器堵塞引起鍋爐特性變化的分析.pdf
摘自《自動化博覽》2021年7月刊
北京市公安局海淀分局備案號：11010802023656號