造纸污泥与煤掺混燃烧特性及其动力学行为

The co-combustion characteristics and kinetic behavior of paper sludge and coal

中文关键词: 造纸污泥  褐煤  烟煤  混合燃烧  分布式活化能模型

英文关键词: paper sludge  lignite  soft coal  co-combustion  distribute activation energy model (DAEM)

中文摘要:

      通过热失重实验和分布式活化能模型方法, 研究20.00% 氧气/80.00% 氮气的燃烧气氛下, 造纸污泥 在10、20 和40 ℃/min 3 个升温速率下的燃烧特性和动力学参数, 以及40 ℃/min 升温速率下造纸污泥与褐 煤/烟煤在不同掺混比下的燃烧特性和动力学参数。 研究结果显示: 随着升温速率的不断增加, 造纸污泥的失 重速率、 综合燃烧指数和活化能也随之不断增加, 表明燃烧在高升温速率下变得剧烈, 且提高升温速率对燃烧 具有改善作用; 随着提高褐煤/烟煤的掺混比, 燃烧特性不断向褐煤/烟煤靠近; 随着褐煤掺混比的增加, 混样 的综合燃烧指数先增加后减小再增加, 活化能则呈现波浪性变动, 且70.00% 的造纸污泥与30.00% 的褐煤为 最佳掺混比; 随着烟煤掺混比的增加, 综合燃烧指数先增加后减小, 在掺混比各占一半时达到最大值(5 .955 × 10-7 min-2 · ℃ -3 ) , 活化能从202.70 不断增加至247.99 kJ/mol。 对于造纸污泥掺混煤燃烧的无害化、 资源 化利用方式中, 褐煤的掺混比烟煤的掺混从燃烧特性以及动力学特性方面而言更具有优势。

英文摘要:

      Chapter by thermo-gravimetric experiment and distributed activation energy model method, in the 20.00%O2/80.00%N2 atmosphere, the combustion characteristics and kinetics parameters of papersludge at 10, 20 and 40 ℃/minthesethree heatingrates were studied. Andthe co-combustion characteristics and kinetics parameters of paper sludge and lignite/ soft coal under different mixing ratios at the heating rate of 40 ℃/min were also researched. The results showed that with the increasing of heating rate, the weight loss rate, the comprehensive combustion index and the activation energy of municipal sludge and paper sludge increased. It indicated that the combustion becameintense under high heatingrate andtheincrease of heatingrate had animprovement effect on the combustion. Withtheincreasing oflignite/soft coal mixing ratio, the combustion characteristics of blends moved towards to lignite/soft coal. With the lignite mixing ratio increase, the comprehensive combustion index of blends first increased, then decreased and then increased and the activation energy showed a wave change. In addition, 70.00% paper sludge with 30.00% lignite might be the suitable mixing ratio. With the adding of soft coal mixing ratio, the comprehensive combustion index first increased and then decreased, reaching the maximum value (5 .955 ×10-7 min-2 · ℃-3 ) when the mixture ratio accounted for half of each, and the activation energy continuously increased from 202.70 to 247.99 kJ/mol. In terms of harmless and resource utilization of co-combustion of paper sludge and coal, lignite blending has more advantages than soft coal blending in terms of combustion characteristics and kinetic characteristics.