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利用TG-DTG-DTA联用方法对不同升温速率下的甜高粱茎秆发酵后残渣进行燃烧特性试验,并在燃烧试验平台上开展未完全燃烧物测试,研究颗粒化利用的可行性。试验表明,甜高粱茎秆发酵后残渣燃烧主要集中在挥发分燃烧阶段;空气气氛下,升温速率在40℃/min条件下,燃烧效果最好,挥发分释放特性和综合燃烧特性指数最大。甜高粱茎秆发酵残渣的颗粒化燃烧试验中,过量空气系数在1.7和2.2之间时,NO_x最大排放浓度为348.4 mg/m~3;当过量空气系数小于1.95时,NO_x小于300 mg/m3。建议使用高效燃烧器使甜高粱酵渣颗粒在过量空气系数小于1.72的条件下燃烧,降低NO_x排放。
The TG-DTG-DTA method was used to test the combustion characteristics of the residue after sweet sorghum stalks fermentation at different heating rates. The incomplete combustion test was carried out on the combustion test platform to study the feasibility of granulation utilization. The results showed that the combustion of sweet sorghum stalks mainly focused on the combustion of volatile components. Under the air atmosphere, the heating rate was the best at 40 ℃ / min, and the volatile release characteristics and comprehensive combustion index were the highest. When the excess air ratio is between 1.7 and 2.2, the maximum NO_x emission concentration is 348.4 mg / m ~ 3 when the excess air ratio is less than 1.95 and NO_x is less than 300 mg / m3 when the excess air ratio is less than 1.95 . It is advisable to use high-efficiency burners to burn sweet sorghum pellets under an excess air ratio of less than 1.72 to reduce NO x emissions.