The trash trap is a kind of rack type trash arresting equipment which floats in the front of a certain water area in front of the water inlet to intercept the floating in the water flow. On the river with more floating debris, if only trash rack is set, a large amount of dirt will be accumulated in front of the rack. If the cleaning is not timely, the rack hole will be blocked and the water diversion will be affected. A trash rack is set in front of the trash rack. The combination of the two has a good effect.
The trash rack is mainly composed of pontoon (metal, plastic), trash rack net, steel wire rope, sliding guide rail and other components. In the reservoir with large water level change, the trash rack can be made into chain type flexible bent or both ends can be made into sliding track, which can float up and down according to the change of water level. The size and spacing of pontoons depend on the type, volume and quantity of floating objects. The trash trap can be arranged at the front of the open water surface far away from the intake. Due to the large discharge area, the head loss is small and can be ignored generally.