长江科学院院报2024，Vol.41Issue(4)：29-36,8.DOI:10.11988/ckyyb.20221576
复合调理对淤泥机械压滤脱水特性的影响机理分析
Influence Mechanism of Composite Conditioning of Sludge on Dehydration Performance of Mechanical Pressure Filtration
李世汩 1张洋 1夏新星 1陈文峰 1徐扬帆1
作者信息
- 1. 中交第二航务工程局有限公司,武汉 430040||长大桥梁建设施工技术交通行业重点实验室,武汉 430040
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摘要
Abstract
Dehydration through mechanical pressure filtration is widely used for dehydrating river and lake sludge.The conditioning of the sludge significantly impacts the efficiency of mechanical filtration dehydration.Two common conditioning measures include utilizing flocculant with polyacrylamide(PAM)and employing a compound condi-tioning approach that combines flocculant with an inorganic conditioner.In recent years,compound conditioning methods have seen rapid development.Studying the impact of single and compound conditioning of flocculants on the efficiency and mechanism of mechanical filtration dehydration is crucial.Focusing on the sludge sourced from Guantian Lake,this study compares the conditioning performance of PAM and LAC and their dehydration perform-ance,and analyzes the dehydration technical parameters in PAM and PAM+LAC conditioning cases.The effect of composite conditioning on the structure of dehydrated sludge cake is also revealed via mercury intrusion test and SEM scanning.Findings indicate that the conditioning agent primarily enhances the filtration and dehydration sta-ges,as evidenced by water loss meter tests aligning well with the plate and frame mechanical filtration press results.The use of LAC as a supplement to PAM can improve the unloading performance of the sludge cake by enhancing conditioning effects.Microscopic analysis revealed that LAC enlarged the pore size of the sludge cake and increased the proportion of open pores.关键词
淤泥/复合调理/脱水机理/压汞试验/孔隙特征Key words
sludge/compound conditioning/dehydration mechanism/mercury intrusion test/pore characteristics分类
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李世汩,张洋,夏新星,陈文峰,徐扬帆..复合调理对淤泥机械压滤脱水特性的影响机理分析[J].长江科学院院报,2024,41(4):29-36,8.
