清污机其主要应用于泵站、水电站、倒虹吸等水工建筑物的进水口处，它以拦污栅拦截水流中所携带的污物（树木枝干、树叶、杂草、生活垃圾等），并通过回转的齿耙将其捞到桥面上，用皮带输送机或其他方式运走，避免污特进入引水道内，保证机组或其他设备与结构顺利进行。
The trash remover is mainly used at the water inlet of hydraulic structures such as pump station, hydropower station, inverted siphon, etc. it intercepts the dirt (tree branches, leaves, weeds, domestic garbage, etc.) carried in the water flow by trash rack, and then it is lifted to the bridge deck by the rotary tooth rake, and transported away by belt conveyor or other means to avoid the dirt entering the water diversion channel, so as to ensure the unit or other equipment Smooth progress with structure.