The grille is the main auxiliary equipment in the sewage pumping station. The grid generally consists of a set of parallel bars that lie diagonally at the inlet of the sump of the pumping station. Its tilt angle is 60°~80°. After the grille should be set to work table, the table should generally be higher than the upper reaches of the grid 0.5m maximum water level. For artificially cleaned slag grids, the length of the table along the water flow direction is not less than 1.2m, and the length of the mechanical slag grate is not less than 1.5m, and the aisle width on both sides is not less than 0.7m.

Contaminants in sewage generally exist in three forms: suspended (including floating), colloidal, and dissolved. The physical treatment of sewage mainly targets the suspended solids and part of the colloid that may block the pump impeller and the pipeline valves and increase the load of the subsequent treatment unit. Therefore, the physical treatment of the sewage is generally called the solid-liquid separation treatment of the wastewater. In principle, the solid-liquid separation of wastewater is divided into two major categories: one is that wastewater is subject to certain restrictions, suspended solids are removed by flowing in water, and the other is that suspended solids are subject to certain restrictions, and wastewater flows to form suspended solids. abandon. The grille belongs to the latter. The grille is the main auxiliary equipment in the sewage pumping station. The grid generally consists of a set of parallel bars that lie diagonally at the inlet of the sump of the pumping station.