The Computer Controlled Drum Cell Filter, "PFTC", is a unit designed to observe the operation of a filtering drum that acts on a liquid with suspended solids.
Water with suspended solids is introduced in the system. A computer controlled pump impels the fluid towards the drum tank. A sensor measures the pressure of the fluid before being introduced into the tank.
There is a stirrer in this tank to keep water mixed with the suspended particles. The rotary drum is covered by a filtering cloth, so the part immersed in the tank filters the water. Thus, clean water passes through the cloth and the suspended particles remain in the drum surface. Therefore, when the drum rotates the layer of suspended particles becomes a cake and it is cut before entering the tank again. This tank has an overflow, which can be located at different heights and keeps the water volume constant.
The cake must be separated from the filtering cloth before being cut. This can be done by two different methods: The first one is to apply vacuum in the inner side of the drum with a computer controlled vacuum pump and a vacuum tank. In this tank there is a pressure sensor to check that it works properly and a level sensor that detects the water height. It can also be removed with a compressed air connection, where the pressure can be regulated with a manual valve and measure its value with a pressure sensor. With both methods the cake dries and is taken off. When the cake comes off, it drops into a storage tank. Clean water goes to the vacuum tank.
Both the vacuum tank and the drum tank have a valve to drain them when required.
This Computer Controlled Unit is supplied with the EDIBON Computer Control System (SCADA), and includes: The unit itself + a Control Interface Box + a Data Acquisition Board + Computer Control, Data Acquisition and Data Management Software Packages, for controlling the process and all parameters involved in the process.