板框式旋转滤网清污性能分析及提升研究

在核电站冷源系统中，各种过滤设备对于保障电站冷却水水质具有重要作用，其中旋转滤网为最重要的过滤设备。为提高其拦截及清污能力，最终提升核电站冷源系统的可靠性，对现有板框式旋转滤网进行分析研究，提出了3种改进优化设计方案：（1）斗形结构网板框架；（2）弧形结构网板框架；（3）斗形与弧形网板框架组合结构。分别给出了这3种网板框架结构与原结构清污量的理论最大值，结果表明3种方案均能较大幅度地提升旋转滤网的清污能力。为验证理论计算结果，对这3种优化方案进行工业性试验，采用纤维球和灌水塑料球模拟被拦截的污物，所得结果与理论计算结果基本一致，其中斗形与弧形网板框架组合结构清污能力最强。

Analysis and Enhancement Study on the Cleaning Capacity of Plate-Frame Rotary Filter

Of all various filters that are vital to ensure the water quality for the nuclear power station, the rotary filter plays the most significant role in the cooling water source system. In order to improve the interception and decontamination capability and ultimately enhance the reliability of the cooling water source system of nuclear power station, three optimized design schemes are proposed based on the analysis and study of the existing plate-frame rotary filter:(1) Bucket-shaped reticulated frame; (2) Arc-shaped reticulated frame; (3) Combination of bucket-shaped and arc-shaped reticulated frame. The theoretical maximal values of the removal capacity with respect to the three mesh frame structures versus the original structure are provided. The results show that all three enhanced schemes can greatly improve the removal capacity of the rotary filter. To verify the theoretical calculation results, industrial tests were carried out on the three above schemes respectively by using the fiber balls and water-filled plastic balls to mimic the contaminants to be intercepted. The testing results were basically consistent with the theoretical calculation results. In addition, the bucket-shaped and arc-shaped lattice frame composite structure has exhibited the strongest cleaning capacity.