A Preliminary Investigation of Filter Mud Dewatering and Its Combustive Properties

2018 International Conference on Construction, Aviation and Environmental Engineering

生态环境科学;生物科学

Tang, Qiuping^1 ; Zhou, Shaoji^1 ; Huang, Shangliao^2 ; Liang, Yiyu^2 ; Liu, Faqiu^1 ; Xiang, Min^1

School of Light Industry and Food Eng., Guangxi Univ., Nanning, Guangxi

530004, China^1

COFCO Chongzuo Sugar Company Limited, Zongzuo Guangxi

532200, China^2

关键词: Boiler fuels;    Burning rate;    Elevated temperature;    Filter press;    Fixed carbons;    Pyrolysis and combustions;    Sugar mills;    Volatile matters;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/233/4/042047/pdf
DOI  :  10.1088/1755-1315/233/4/042047

来源: IOP

【 摘 要 】

In order to evaluate the possibility of making use of the filter mud from sugar mills as a boiler fuel, experiment on dewatering the mud by filter press with expression at elevated temperature was carried out and the combustive properties of the dewatered mud were investigated. The proximate and calorific values of the dewatered mud were determined, and the combustive properties were analyzed through thermogravimetric analysis. The results shown that the filter mud could be dewatered to the moisture content around 50% when expressed under the pressure between 1.6∼2.5MPa at 95 °C. The contents of moisture, ashes, volatile matters and fixed carbon on air dried basis were about 9.4%, 19.8%, 58.9%, 12.0% respectively and the calorific value of dewatered mud was around 8450kJ/kg, indicating that it is an appropriate fuel. The thermogravimetric analysis showed that the pyrolysis and combustion of volatiles took place between 200∼370 °C, where the weight loss accounted for over 50%. The fixed carbon was combusted between 370∼550 °C. The temperatures at ignition, peak burning rate and burn out were 280 °C, 340 °C and 550 °C respectively. The ignition, burnout and comprehensive combustion indexes were 3.8 × 10-5 mg•min-1°C-2, 7.2 × 10-3 min-1, 1.8 × 10-8 mg2min-2°C-3 respectively.