湿污泥在流化床中干燥特性

袁东成; 黄亚继; 孙宇; 贾纪强

环境工程学报

湿污泥在流化床中干燥特性

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袁东成, 黄亚继, 孙宇, 贾纪强. 湿污泥在流化床中干燥特性[J]. 环境工程学报, 2013, 7(6): 2317-2321.

引用本文:

袁东成, 黄亚继, 孙宇, 贾纪强. 湿污泥在流化床中干燥特性[J]. 环境工程学报, 2013, 7(6): 2317-2321.

Yuan Dongcheng, Huang Yaji, Sun Yu, Jia Jiqiang. Drying characteristics of wet sludge in a fluidized bed[J]. Chinese Journal of Environmental Engineering, 2013, 7(6): 2317-2321.

Citation:

Yuan Dongcheng, Huang Yaji, Sun Yu, Jia Jiqiang. Drying characteristics of wet sludge in a fluidized bed[J]. Chinese Journal of Environmental Engineering, 2013, 7(6): 2317-2321.

湿污泥在流化床中干燥特性

1.
东南大学能源与环境学院能源热转换及其过程测控教育部重点实验室, 南京 210096
基金项目:
国家自然科学基金资助项目(51006023)

国家重点基础研究发展计划(973计划)资助项目(2011CB201505)
中图分类号: X705

Drying characteristics of wet sludge in a fluidized bed

1.
Key Laboratory of Energy Thermal Conversion and Control, Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
Fund Project:

摘要: 在鼓泡流化床干燥器内,床料采用0~1 mm的石英砂,以热空气作为干燥介质,对城市污水污泥的流态化干燥特性进行实验研究。通过控制送风温度、流化风量、加料量、污泥粒径等参数,研究在不同工况条件下床温以及干污泥含水率的变化情况。结果表明,随着送风温度的升高,床温升高,干污泥含水率下降,最终趋向于一个稳定值8%。床温随流化风量的增加先是减小而后升高,干污泥的含水率随流化风量的增加先是降低而后增大。当加料量从11 kg/h增加到13 kg/h时,干污泥的含水率基本没有变化,当加料量超过13 kg/h时,干污泥的含水率从8.1%开始呈递增趋势。随污泥粒径的增大,床温升高,干污泥含水率也随之升高。
- 污泥 /
- 流化床 /
- 干燥 /
- 床温 /
- 含水率
Abstract: The drying characteristics of municipal sewage sludge were investigated in a bubbling fluidized bed using quartz sand in size of 0~1 mm as bed material and hot air as drying medium. The changes of bed temperature and moisture content of dried sludge were studied under different conditions, such as air supply temperature, fluidization air rate, feed rate, sludge particle size and other parameters. The results show that, with the increasing of air supply temperature, the bed temperature increases and the moisture content of dried sludge decreases until a stable value of 8%. With the increasing of fluidization air rate, the bed temperature first decreases and then increases, and the moisture content of dried sludge reveals the same trend. With the increasing of feed rate, the bed temperature shows a trend of linear decline. When the feed rate increases from 5.5 kg/h to 6.5 kg/h, the moisture content of dried sludge shows basically no change. When the feed rate is more than 6.5 kg/h, the moisture content of dried sludge shows an increasing trend from 8.1%. With the increasing of sludge particle size, the bed temperature increases, and the moisture content of dried sludge increases too.
- sewage sludge /
- fluidized bed /
- drying /
- bed temperature /
- moisture

[1]	余杰,田宁宁,王凯军.我国污泥处理、处置技术政策探讨.中国给水排水,2005,21(8):84-87 Yu Jie,Tian Ningning,Wang Kaijun.Discussion on the treatment and disposal technology policy of sludge in China.China Water and Wastewater,2005,21(8):84-87(in Chinese)
[2]	Brenton,Mike. Process control advances safe sludge drying.Water and Wastewater International,2003,18(5):36-42
[3]	张辰.城市污泥集约化处理.中国给水排水,2002,28(4):21-22 Zhang Chen.Municipal intensive treatment of sludge. China Water and Wastewater,2002,28(4):21-22(in Chinese)
[4]	张宁生,周强泰,芮新红.污泥的焚烧处理技术.能源研究与利用,2003,(1):35-37 Zhang Ninsheng, Zhou Qiangtai, Rui Xinhong. Processing technology of incineration of sludge. Research and Utilization of Energy,2003,(1):35-37(in Chinese)
[5]	普大华,吴学伟.城市综合污水处理厂污泥处理技术及应用.广州环境科学,2006,21(4):14-16 Pu Dahua,Wu Xuewei. Sludge treatment technologies and applications of municipal sewage treatment plant. Environmental Science of Guangzhou,2006,21(4):14-16(in Chinese)
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[11]	吕清刚,范晓旭,那永洁,等.城市下水污泥和煤/LPG 在循环流化床上的混烧实验研究.工程热物理学报,2006,27(2):339-342 Lü Qinggang,Fan Xiaoxu,Na Yongjie,et al.Co-combustion of urban sewage sludge and coal/LPG in the circulating fluidized bed. Journal of Engineering Thermophysics, 2006,27(2):339-342(in Chinese)
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袁东成, 黄亚继, 孙宇, 贾纪强. 湿污泥在流化床中干燥特性[J]. 环境工程学报, 2013, 7(6): 2317-2321.

引用本文:

袁东成, 黄亚继, 孙宇, 贾纪强. 湿污泥在流化床中干燥特性[J]. 环境工程学报, 2013, 7(6): 2317-2321.

Yuan Dongcheng, Huang Yaji, Sun Yu, Jia Jiqiang. Drying characteristics of wet sludge in a fluidized bed[J]. Chinese Journal of Environmental Engineering, 2013, 7(6): 2317-2321.

Citation:

Yuan Dongcheng, Huang Yaji, Sun Yu, Jia Jiqiang. Drying characteristics of wet sludge in a fluidized bed[J]. Chinese Journal of Environmental Engineering, 2013, 7(6): 2317-2321.

湿污泥在流化床中干燥特性

1. 东南大学能源与环境学院能源热转换及其过程测控教育部重点实验室, 南京 210096

收稿日期: 2012-12-18

基金项目:

国家自然科学基金资助项目(51006023)

国家重点基础研究发展计划(973计划)资助项目(2011CB201505)

关键词:

污泥 /
流化床 /
干燥 /
床温 /
含水率

摘要: 在鼓泡流化床干燥器内,床料采用0~1 mm的石英砂,以热空气作为干燥介质,对城市污水污泥的流态化干燥特性进行实验研究。通过控制送风温度、流化风量、加料量、污泥粒径等参数,研究在不同工况条件下床温以及干污泥含水率的变化情况。结果表明,随着送风温度的升高,床温升高,干污泥含水率下降,最终趋向于一个稳定值8%。床温随流化风量的增加先是减小而后升高,干污泥的含水率随流化风量的增加先是降低而后增大。当加料量从11 kg/h增加到13 kg/h时,干污泥的含水率基本没有变化,当加料量超过13 kg/h时,干污泥的含水率从8.1%开始呈递增趋势。随污泥粒径的增大,床温升高,干污泥含水率也随之升高。

English Abstract

Drying characteristics of wet sludge in a fluidized bed

1. Key Laboratory of Energy Thermal Conversion and Control, Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China

Received Date: 2012-12-18

Fund Project:

Keywords:

Abstract: The drying characteristics of municipal sewage sludge were investigated in a bubbling fluidized bed using quartz sand in size of 0~1 mm as bed material and hot air as drying medium. The changes of bed temperature and moisture content of dried sludge were studied under different conditions, such as air supply temperature, fluidization air rate, feed rate, sludge particle size and other parameters. The results show that, with the increasing of air supply temperature, the bed temperature increases and the moisture content of dried sludge decreases until a stable value of 8%. With the increasing of fluidization air rate, the bed temperature first decreases and then increases, and the moisture content of dried sludge reveals the same trend. With the increasing of feed rate, the bed temperature shows a trend of linear decline. When the feed rate increases from 5.5 kg/h to 6.5 kg/h, the moisture content of dried sludge shows basically no change. When the feed rate is more than 6.5 kg/h, the moisture content of dried sludge shows an increasing trend from 8.1%. With the increasing of sludge particle size, the bed temperature increases, and the moisture content of dried sludge increases too.

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湿污泥在流化床中干燥特性

Drying characteristics of wet sludge in a fluidized bed

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湿污泥在流化床中干燥特性

English Abstract

Drying characteristics of wet sludge in a fluidized bed

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