The difference between internal water intake and external water intake: the internal water intake pipe directly leads into the inside of the drum, the sewage passes through the inner surface of the screen and the solids and suspended matter are intercepted by the filter, and then rotates through the drum to the slag bucket.

Working principle of external water intake: Waste water enters the sump and overflows to the surface of the drum screen through overflow. The solid and suspended matter are intercepted by the filter and scraped from the scraper to the slag bucket, and the filtered water passes through the pores of the screen. Drain to the water tank.

How it works: Install it in a 35- degree water tank. Sewage flows into the drum from the end of the drum. Water flows through the gaps in the grid. The solid waste is filtered in a grid basket. The gap between the cleaning arm and the rake tooth cleaning grid moves in a circular motion, the rake teeth enter the grid and solids come out. It is different from the internal flow grid. When the cleaning arm is at a point, the garbage is removed from the rake teeth through the action of water washing and the slag baffle, and falls into the spiral funnel of the garbage collection device.

During transportation, it is dehydrated by variable pitch and dried in the upper pressure zone, and the squeezed water is reflued . To the canal, the garbage is sent to the container or subsequent equipment, and then processed. The drum grille is one of the main products of the complete set of pretreatment and decontamination equipment. This equipment is an advanced technology that continuously and automatically removes liquids of various shapes, with the purpose of solid-liquid separation.

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