Considering practical situations, what issues should be paid attention to during the operation of side filtration?

A. Basic principle: The raw water is fed into the filter tank through the inlet pipe, and is filtered from top to bottom by the filter medium; the clean water then enters the clean water tank via the outlet pipe, while the filter medium continuously traps suspended solids. B. Backwashing procedure: After the equipment has been in operation for a while, impurities continue to accumulate on the surface of the filter media and filter heads, which creates resistance to water flow and results in a decrease in the flow rate of the treated water. A pressure difference develops between the raw water inlet and the clean water outlet; generally, when the difference in readings on the pressure gauge between these two points is 0.1–0.15 Map, backwashing is necessary. It is also possible to set a specific time interval for carrying out backwashing. In order to discharge the separated suspended contaminants outside the device, a certain amount of compressed air and backwash water must be introduced from below the filter. Through the dispersing action of the filter plates and filter heads, the filtration layer is cleaned from bottom to top, causing the contaminants to separate from the filter media; they then flow together with the backwash water into the upper water distribution mechanism and are discharged outside through the central tube, at which point the entire backwashing process is completed. During backwashing, close the inlet valve and the outlet valve. First, open the lower drain valve to allow the water inside the filter to flow into the upper sight glass; once this has happened, close the drain valve. Next, open the compressed air inlet valve, and use the air to scrub and stir the contents for about 10–15 minutes. After that, close the air inlet valve, and open the backwashing inlet valve and the backwashing outlet valve. The backwashing process should last 5–10 minutes; once the turbidity of the water coming out of the filter is similar to that of the water entering it, close the backwashing inlet and outlet valves. Finally, reopen the inlet and outlet valves to return the system to normal operation.