What types of automatic backwash filter equipment are there

According to different sources of backwashing solution, there are two forms of backwashing: -Endogenous backwashing Make full use of the reverse engineering fluidity of the leachate of other filter unit modules to clean the sludge on the outer surface of the filter unit. During backwashing, the intelligent controller changes a group of pneumatic valves of the filter unit module to be backwashed, that is, the valve that cuts off its inlet, and then opens the drain valve. Other filter unit modules reverse engineer a small part of the filtered solution to backwash the fluidity of the filtered unit module. After the sludge on the surface of the filter element is completely removed in a short time, the residual liquid flows into the sewage collection and drainage pipeline, and then close the drainage valve, open the inlet valve, and then return to the filtration mode. After the intelligent controller backwashes the filter unit modules one by one, all backwashing processes are completed. When one of the filter unit modules is backwashed, the others are still in the normal filtration mode. This backwashing form is generally mainly used for non precious solutions with low viscosity and excessive backflushing pressure (that is, the system pressure is greater than 0.4MPa, depending on the viscosity is rich in - constant difference). Automatic backwash filter -External backwashing Make full use of the clean fluid mechanics (solution or gas) connected to the external structure to assist in cleaning the sludge on the surface of the filter element. During backwashing, the intelligent controller cuts off one of the pneumatic valves for the inlet and outlet of the filter unit module, and then opens the valve at the inlet of the auxiliary backwash fluid mechanics to supply a certain amount of fluid mechanics. When the pressure of the backwash reaches the pressure of the inlet of the backwash fluid mechanics, the drain valve is opened for a short time, and a hydraulic (pneumatic) pressure pulse appears, and the sludge on the filter element surface is completely removed in a short time. Then close the back flushing fluid inlet valve, close the drain valve, open the inlet valve of the article, open the outlet valve, and then return to the filtration mode. After the intelligent controller backwashes the filter unit modules one by one, all the backwashing processes are completed. When one of the filter unit modules is backwashed, the others are still in the normal filtration mode. This backwashing form is generally used for occasions with slightly higher viscosity or precious solution, requiring excessive backwash pressure or low system pressure (less than 0.4MPa, depending on the viscosity, there is a certain difference).