Daily cleaning and maintenance of fiber turntable filter cloth filter

1. Daily cleaning method
The water level or pressure difference of the filter tank is monitored through the PLC control system. When the set threshold is reached, the backwash pump is started to use negative pressure to suck the sludge attached to the surface of the fiber turntable filter cloth filter. The backwash frequency is usually 60-120 minutes/time, and each time lasts 1-2 minutes. The direction of the backwash water flow is opposite to the filtering direction, and the flushing pressure is controlled within the standard range to avoid high-pressure impact causing the filter cloth fiber to break. For grease or organic pollution, a low-concentration acid and alkali cleaning agent can be used to soak the filter cloth for 15-30 minutes during the cleaning process, and then rinse with clean water. After stopping the machine, remove the filter disc, brush the surface of the filter cloth lightly with a soft brush, and focus on removing stubborn particles at the folds of the filter cloth. If the filter cloth is seriously blocked, a high-pressure water gun can be used for local flushing to avoid direct impact on the weld.

2. Maintenance points
Regularly check whether the filter cloth surface is damaged, off-line or blocked, and focus on observing the filter cloth joints. If the pore size is enlarged or there is local wear, the filter cloth needs to be replaced in time. Check the sludge pump and pipeline daily to prevent blockage caused by sludge deposition. The sludge discharge cycle is adjusted according to the amount of sludge. The filtration process needs to be closed during sludge discharge to ensure that the sludge is completely returned to the pretreatment tank. The drive mechanism of the fiber turntable filter cloth filter is filled with lithium-based grease every month to maintain the chain tightness to prevent the filter disc from getting stuck. Check the sealing of the connection between the center tube and the filter disc to prevent water leakage or sludge from penetrating into the bearing, and replace the O-ring every quarter. Regularly calibrate the liquid level sensor and pressure transmitter to ensure that the PLC control program accurately triggers the backwashing and sludge discharge actions. The touch screen interface needs to be kept clean to avoid accidental touch or abnormal display.