初期雨水中含有大量的污染物质,通过弃流装置将初期雨水进行弃流处理,收集中后期雨水储存回用,有利于降低雨水的净化和使用成本。降雨弃流装置按弃流原理可分为机械型、非机械型和电控型。本文举例分析了当前各类弃流装置的构造、原理和优缺点,以期为今后初期雨水弃流装置提供设计思路。 The initial rainwater contains a large amount of pollutants. The abandoned rainwater is discarded by discarding device, and the rainwater is stored and reused in the later period, which is beneficial to reduce the purification and usage costs of rainwater. Abandoned flow device according to Abandoned flow principle can be divided into mechanical, non-mechanical and electrical control. This paper gives an example to analyze the structure, principle, advantages and disadvantages of various types of discard flow devices in the hope of providing design ideas for the rainwater discard devices in the future.