小型碱回收锅炉燃烧改造实例

Transformation Example of Combustion for Small Recovery Boiler

关键词:  碱回收锅炉  燃烧  风门  NO_x  黑液

Key Words:alkali recovery boiler  combustion  dampers  NO_x  black liquor

摘要:碱回收锅炉（简称碱炉）作为制浆造纸厂的关键设备之一，主要用于燃烧处理制浆过程中产生的黑液，是制浆厂中氮氧化物（NO_x）等酸性气体污染物的主要来源。本文通过对碱炉中黑液特性和黑液燃烧机理的分析，对碱炉各级供风的配风模式进行了优化改造，并以此改善碱炉燃烧工况；进而减少了NO_x的原始生成量，保证了碱炉烟气污染物达标排放的先决条件，具有显著的经济效益和环境效益。

Abstract:As the core equipment of the pulp and paper mill， the alkali recovery boiler （referred to as recovery boiler） was used to burn the black liquor generated in the pulping process， which was the main emission source of acid gas pollutants such as nitrogen oxide （NO_x） from the pulp mill. In this project， by analyzing the characteristics and combustion mechanism of black liquor in recovery boiler， the air distribution modes for all levels of air supply in the recovery boiler were optimized and transformed， thereby improving the combustion conditions of the recovery boiler， reducing the original generation of NO_x， and ensuring the prerequisites for the standard emission of flue gas pollutants in the recovery boiler， which had significant economic and environmental benefits.