摘要：本项目地处长江口高含沙海域，海域海水含沙量波动较大，临近已建LNG项目海水取水系统普遍存在泥沙淤积问题，需常态化清淤运维。本次项目依托现有工程经验与物理模型试验成果，针对性优化取水管、取水前池、泵体流道及海水管道等核心设施结构，通过限制非运行闲置区域的海水流动，从根源减少泥沙沉积流速优化；同时设置分区隔离、动态投运等设计，优化设备可维护性，有效提升系统防沙除沙效率，降低后期运维成本，保障海水取水系统长期稳定运行。
Abstract:This project is located in the high-sediment marine area at the Yangtze River Estuary where the seawater sediment concentration fluctuates significantly. The seawater intake systems of adjacent completed LNG projects generally suffer from sediment deposition, requiring regular desilting and maintenance. Based on existing engineering experience and physical model test results, the design of this project optimizes the structural design of core facilities including water intake pipes, intake forebays, pump flow passages and seawater pipelines. By limiting seawater flow in idle non-operational areas, flow velocity is optimized to fundamentally reduce sediment deposition. Adopting innovative designs of zoned isolation and dynamic commissioning improves equipment maintainability. This method effectively enhances the system’s sand prevention and removal capacity, reduces later operation and maintenance costs, and ensures the long-term stable operation of the seawater intake system.
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