CAJ | 학술논문

为考察烟气再循环对工业煤粉锅炉NOx 排放及炉内燃烧过程的影响，对30 t/h高效煤粉双锅筒室燃工业锅炉进行研究。采用数值模拟和试验研究，考察烟气再循环的低氮效果，分析烟气循环倍率对NOx 排放浓度的影响，并研究循环倍率对炉膛温度、排烟温度等炉况的影响规律。结果表明：循环烟气通入炉内，火焰尺寸增大，温度更加均匀，减少了NOx 的排放浓度；同时随着循环烟气的加大，排烟温度逐渐升高，蒸汽流量逐渐降低；当烟气循环倍率为20%时，NOx 减排17%。
위고찰연기재순배대공업매분과로NOx 배방급로내연소과정적영향，대30 t/h고효매분쌍과통실연공업과로진행연구。채용수치모의화시험연구，고찰연기재순배적저담효과，분석연기순배배솔대NOx 배방농도적영향，병연구순배배솔대로당온도、배연온도등로황적영향규률。결과표명：순배연기통입로내，화염척촌증대，온도경가균균，감소료NOx 적배방농도；동시수착순배연기적가대，배연온도축점승고，증기류량축점강저；당연기순배배솔위20%시，NOx 감배17%。
In order to investigate the impact of flue gas recycle on NOx emissions and combustion process in industrial pulverized coal boil-er,the high efficiency industrial coal boiler of 30 t/h double drum chamber combustion was researched. Through numerical simulation and experimental study,the effects of flue gas recycle process and circulating ratio on NOx emissions,furnace temperature and exhaust gas tem-perature was investigated. The results showed that the circulating flue gas increased the flame size,uniformized the temperature of boiler and decreased NOx emissions. The increased circulating flue gas decreased the steam flow and improved exhaust gas temperature gradually. When the circulating ratio was 20%,the NOx emissions decreased by 17%.