The water flow in the LNG receiving station's water intake channel is complex,and sedimentation issues are often unavoidable,especially in areas with high sediment content.Sedimentation within the channel may pose a threat to the normal operation of the receiving station.To achieve dredging without stopping the operation of the LNG intake pump station,a physical model experiment of jet flushing was conducted.The experiment simulated the characteristics of the water flow between suction intervals and the flushing effect after the jet flushing device was activated.It explored the impact of factors such as the angle between the nozzle and the wing wall,jet flow rate,and flushing time on the sediment reduction and dredging effect within the channel.The results indicate that under ideal conditions,continuous operation of the jet flushing device for 12 h can achieve a relatively ideal dredging effect.After a single large wave,the device's continuous operation for half an hour can also achieve a relatively ideal dredging effect.The dredging effect varies with different jet flow rates,nozzle and wing wall angles,and flushing times.Combining the results of the physical model experiment on sedimentation at the intake pump station,sedimentation mainly occurs in the forebay,end of the filtration pool,suction intervals,and near the firefighting pump.It is recommended to install jet flushing devices in these areas to achieve sediment reduction and dredging without stopping the operation,improving water intake safety assurance,and enhancing operational efficiency.
Zhoushan LNGintake pump stationsedimentationjet flushingphysical model
NETL
NSTL
万方数据
