Effect of moisture on sewage sludge combustion temperature profile and heavy metal leaching

被引：19

作者：

Huang, Qunxing ^{[1
]}

Yu, Ben ^{[1
]}

Qiu, Kunzan ^{[1
]}

Zhou, Guoshun ^{[1
]}

Wang, Shoukang ^{[1
]}

Chi, Yong ^{[1
]}

Yan, Jianhua ^{[1
]}

机构：

[1] Zhejiang Univ, Inst Thermal Power Engn, Hangzhou 310027, Zhejiang, Peoples R China

来源：

DRYING TECHNOLOGY | 2016年 / 34卷 / 15期

关键词：

Combustion characters; combustion model; moisture content; shrinkage rate; single sludge pellet; FLUIDIZED-BED; MASS-TRANSFER; PARTICLE; PULP;

D O I：

10.1080/07373937.2016.1142451

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Moisture is the most important parameter affecting sewage sludge treatment efficiency and cost. In this article, the effect of moisture on sewage sludge combustion temperature profile and heavy metal leaching behavior has been experimentally studied. The temperature profiles inside the sludge pellet were recorded, and the volume shrinkage was obtained by image processing method. Results revealed that combustion rate and burnout of sludge strongly depends on moisture content and there exists an optimal moisture content for sludge incineration with respect to best combustion performance and minimum heavy metal leaching. The enlarged pore size may account for this moisture rate, that is, 48% for the sludge studied. During combustion, the shrinkage rate varied from 15 to 25%, and it was found to be proportional with moisture content. The cross-section image of burning sludge pellet illustrated that during the drying and combustion stage, the moisture evaporation was running parallel with the decomposition of volatile that was burned out in the vicinity of the sludge surface. Measured temperature profiles indicate that effect of volatile combustion on inner temperature profile was ignorable. A mathematic model taking sludge volume shrinkage into consideration has been developed to predict sludge central and surface temperature during combustion.

引用

页码：1810 / 1819

页数：10

共 23 条

[1] Fate of heavy metals during municipal solid waste incineration [J].

Abanades, S ;

Flamant, G ;

Gagnepain, B ;

Gauthier, D .

WASTE MANAGEMENT & RESEARCH, 2002, 20 (01) :55-68

[2]

AGARWAL PK, 1989, CHEM ENG RES DES, V67, P457

[3] Effects of compost produced from town wastes and sewage sludge on the physical properties of a loamy and a clay soil [J].

Aggelides, SM ;

Londra, PA .

BIORESOURCE TECHNOLOGY, 2000, 71 (03) :253-259

[4]

[Anonymous], 2011, EUR FIG EUR YB 2011

[5]

[Anonymous], 2007, HJ/T 300

[6]

Borodulya V., 1995, P 13 INT C FLUID BED, P135

[7] Fundamental behaviors in combustion of raw sewage sludge [J].

Cui, H ;

Ninomiya, Y ;

Masui, M ;

Mizukoshi, H ;

Sakano, T ;

Kanaoka, C .

ENERGY & FUELS, 2006, 20 (01) :77-83

[8] COMPREHENSIVE MATHEMATICAL MODEL FOR BIOMASS COMBUSTION [J].

Fatehi, H. ;

Bai, X. S. .

COMBUSTION SCIENCE AND TECHNOLOGY, 2014, 186 (4-5) :574-593

[9] Thermogravimetric study of different sewage sludges and their relationship with the nitrogen content [J].

Gómez-Rico, MF ;

Font, R ;

Fullana, A ;

Martín-Gullón, I .

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 2005, 74 (1-2) :421-428

[10] Modeling and Experimental Studies of the Effects of Volume Shrinkage on the Pyrolysis of Waste Wood Sphere [J].

Huang, Qun X. ;

Wang, Ru P. ;

Li, Wen J. ;

Tang, Yi J. ;

Chi, Yong ;

Yan, Jian H. .

ENERGY & FUELS, 2014, 28 (10) :6398-6406

← 1 2 3 →