摘要
Abstract
In this paper,a systematic investigation was conducted on the methods for dewatering of the dredged sediment,and a comprehensive analysis was conducted on the principles,scope of application,advantages and disadvantages,and equipment used in commonly used dredging sediment dewatering technologies.These methods include natural drying method,active ditch drainage drying method,mechanical dewatering method,preloading method,geotextile bag method,electrodialysis method,and auxiliary dewatering method.A comparative analysis was conducted on the advantages and disadvantages of five types of mechanical dewatering equipment,and four types of flocculants used for auxiliary dewatering were compared and analyzed.On this basis,in response to the engineering characteristics of the comprehensive elimination project of black and odorous water bodies in a certain district of Shenzhen,the belt pressure filtration method was selected for sediment dewatering,and a set of sediment dewatering process was designed and developed.The optimal process parameters for this project are filter cloth tension of 0.65 MPa,operating speed of 0.11 m/s,and mechanical inclination angle of 5 °.Under these conditions,the mud production is 17.47 m3/h.The moisture content of the mud cake is 58.9％.关键词
疏浚底泥/脱水技术/对比分析/影响因素Key words
Dredging sediment/Dehydration technology/Comparative analysis/influence factor分类
建筑与水利
