绞吸挖泥船短排距工况下泥泵节能技术

针对3500 m³/h系列绞吸挖泥船在较短管线输送距离时采用缩口减小流量的问题,通过对舱内泥泵和水下泥泵的叶轮进行叶片改型优化,实现泥泵扬程和功率的降低,并将改型叶轮应用于南通海门某疏浚工程。结果表明,“新海鹭”轮泥泵更换改型叶轮后,在3.4 km排距下采用双泵串联输送粉砂土质泥浆,两泵功率降低约500 kW,油耗减少13.4%,施工180 h节约30 t燃油,达到节约能源的目的。

Energy conservation technology of dredging pumps for cutter suction dredger under condition of short-distance delivery

Aiming at the problem of the 3,500 m³/h cutter suction dredgers changing flow rates with pipe nozzles under the condition of short-distance pipeline delivery,we carry out research on the optimization of inboard pumps and impeller blades of submerged pumps to reduce the head and power of dredging pumps,and apply the modified impeller in the dredging construction project of Haimen in Nantong.The results show that replaced with the new impeller for the dredging pump,the Xinhailu dredger can use double pumps in series to transport silt soil mud.The power of two dredging pumps drops about 500 kW,which can save 13.4%of fuel consumption(saving 30 t fuel in 180 h of construction)of the dredger and achieve energy conservation.