摘要
目的:针对机械脱水存在脱水极限,无法进一步降低污泥含水率的难题,本研究建立脱水-热干化一体化技术,以实现污泥含水率的进一步降低。方法:采用单因素实验,研究污泥初始含水率、污泥位置和干化时间对污泥干化含水率的影响,并通过响应面法对影响污泥干化含水率的条件进行优化,得出最佳干化参数。结果:机械脱水和热干化有机结合可以有效地降低能耗,并建立干化含水率数学模型。该模型的R^(2)(R^(2)adj=0.9743)表明其对实验数据具有良好的拟合度。当污泥干化含水率目标设置为30%时,通过模型优化得出干化含水率的最优参数是污泥初始含水率50%,干化时间42.8 min,此时泥饼最外层含水率降低更快。结论:脱水与干化的有机结合显著降低能耗和提高干化效率,为污泥干化技术的发展提供了理论指导和实践依据。
Aims:Regarding dewatering limit of the mechanical dewatering,the dewatering-drying technology is established to further reduce the water content of sludge.Methods:The effects of initial sludge moisture content,sludge position and drying time on sludge drying moisture content were investigated using one-way experiments.Meanwhile,the conditions affecting the moisture content of sludge drying were optimized by response surface methodology to derive the optimal drying parameters.Results:The organic combination of mechanical dewatering and thermal drying could effectively reduce energy consumption;and the mathematical model of drying moisture content was established.R^(2)(R^(2)adj=0.9743)showed that the mathematical model fitted the individual data effectively.When the target of sludge drying moisture content was set to 30%,the optimal parameters of drying moisture content were derived as:50%initial sludge moisture content,42.8 min drying time,and faster reduction of moisture content in the outermost layer of the sludge cake.Conclusions:The organic combination of dewatering and drying can significantly reduce energy consumption,improve drying efficiency,and provide guidance for sludge drying technology.
作者
屠厚德
卢锡龙
张琰
李春萍
黄敏锐
饶宾期
李玉林
秦鑫
任伟伦
姚润桦
TU Houde;LU Xilong;ZHANG Yan;LI Chunping;HUANG Minrui;RAO Binqi;LI Yulin;QIN Xin;REN Weilun;YAO Runhua(College of Mechanical and Electrical Engineering,China Jiliang University,Hangzhou 310018,China;Zhejiang Hongshi Environmental Protection Co.,Ltd.,Lanxi 321100,China)
出处
《中国计量大学学报》
2025年第1期116-124,共9页
Journal of China University of Metrology
基金
国家自然科学基金项目(No.51878635)
浙江省高层次人才特殊支持计划项目(No.2021R52056)
浙江省自然科学基金重点项目(No.LZ23E080001)。
关键词
市政污泥
响应面
含水率
机械脱水
热干化
municipal sludge
response surface method
moisture content
mechanical dewatering
thermal drying
