Operation and functioning of the gridding machine

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Urban sewage treatment involves the use of various facilities, equipment, and technological processes to separate and remove pollutants from wastewater, converting harmful substances into harmless or useful ones, thereby purifying the water and making full use of resources. The processes commonly used in urban sewage treatment plants today include primary treatment, secondary treatment, and advanced treatment. However, regardless of the treatment process used, sewage pre-treatment is essential. In drainage systems, grids are used to remove larger suspended particles that could clog water pumps and pipeline valves. They represent the first step in wastewater treatment in sewage treatment plants, serving as the main equipment for pre-treatment and playing a crucial role in subsequent processing steps. A grid consists of one or more sets of parallel metal bars and frames, which are installed at an angle in the inlet channels or at the entrance to the collection wells of water pump stations, in order to trap larger suspended particles and impurities in the wastewater. A rotary grille machine consists of a drive mechanism, sprockets, a frame, and toothed rakes. The toothed rakes are made of ABS engineering plastic, nylon, or stainless steel, while the frame is typically constructed from carbon steel or stainless steel. The toothed rakes are arranged in a specific order through the combination of the rake shafts and sprockets, thus forming a connected, closed chain of toothed rakes. The transmission mechanism drives the sprockets on both sides to rotate clockwise from bottom to top on the water-facing side; the effective gap between the grills is determined by the spacing between the toothed rakes, which creates a space for fluid flow and separation. Due to the special structure of the toothed rakes, when they carry debris to the upper part of the grill and then move in the reverse direction, the debris falls off due to its own weight. Relative self-cleaning movement occurs between the front and rear rows of toothed rakes. Meanwhile, an additional pair of rubber brush plates cleans each row of toothed rakes as they pass by, completing one cycle of cleaning. Before starting up, check the slag in front of the grid machine to ensure there are no large amounts of dirt or debris. Is the oil level in the reducer of the grid machine level, and is the quality of the oil satisfactory? Check whether power is supplied to the grid machine’s power control cabinet, and adjust the grid machine to the desired state. Power on only when everything is normal. Set the operation control switch of the grating machine to the “manual” mode. Press the “Start” button on the grating machine, and the grating begins to operate. Keep proper startup records. Set the grid machine operation control switch to the “remote automatic” mode. Press the “Start” button on the grille machine in the control room. Keep proper startup records. When the toothed rake of the grid machine reaches the top position of the grid, press the “Stop” button on the grid machine. Set the toggle switch to the “Stop” position. Turn off the power control switch inside the grid cabinet and close the cabinet door before leaving. Keep proper shutdown records. When large hard objects get stuck on the teeth of the grid machine, and the reducer or other electrical equipment starts to smoke or produce sparks, and it is not possible to shut down the machine properly in time, or if normal shutdown is not feasible, the “Fault” button on the on-site control panel should be pressed to stop the grid machine from operating promptly. Keep proper operation records after shutdown, and report to superiors in a timely manner.