聚硅酸铁和阳离子聚丙烯酰胺在绞吸过程中的防扩散性能

Performance of PSF and CPAM asanti-proliferation agents in process of mobile cutter-suction

针对疏浚工程中的底泥悬浮扩散问题,设计了绞吸试验装置,通过正交试验确定最佳运行参数,通过在绞吸过程中投加PSF (聚硅酸铁)和CPAM (阳离子聚丙烯酰胺),并对上覆水体浊度及底泥扩散高度等变化来探究其防扩散性能。试验结果表明:绞刀转速是绞吸试验的关键因素,在绞吸过程中,投加PSF和CPAM均能降低上覆水体浊度,并能有效控制底泥的扩散高度,改善上覆水体水质。与CPAM相比,PSF控制水体浊度的效果更好,在加入PSF最佳用量时,浊度可以控制在40 NTU以下。在绞吸过程中投加防扩散剂PSF与CPAM,可以有效抑制绞吸过程中的底泥悬浮扩散,避免对周边环境的二次污染。

To solve the problem of suspension diffusion in dredging engineering,a cutter suction experiment device is designed.The best operation parameters are determined by the orthogonal experiment.PSF and CPAM were added in the process of strangulation,and the anti-diffusivity of the overlying water was studied by changing the turbidity and the diffusive height of the sediment.The result shows that the reamer rotating speed is the key factor to the cutter-suction experiment.In the process of cutter suction,PSF and CPAM can reduce the turbidity of overlying water,control effectively the diffusion height of sediment and improve the water quality of overlying water.The performance of PSF was better than CPAM in controlling turbidity,which could be suppressed below 40 NTU in the case of adding PSF as optimum dosage.Adding PSF and CPAM can effectively inhibit the diffusion of suspended solids and avoid the secondary pollution to the surrounding environment.