Experimental Study On Tapered Drum Rotating Type Solid-Liquid Separator

In the case of separating the sands and sediments from the water, the liquid cyclone separator has been used as a mechanical device. There are some limitations to separate the solid particles from the water, because the density difference being 100 in the case of the liquid-cyclone, whereas 103 in the case of the air-cyclone. Especially, in the case of separating the small particles like the sediments under the body of water, the conventional liquid-cyclone separator is inappropriate.In the case of separating the very small particles, the drum rotating type separator has been used. By using this, the centrifugal force acting upon the small particles in the rotating drum in relative rest is very large. However, this device is complicated and expensive.A tapered drum rotating type solid-liquid separator was proposed already, which is relatively simple and inexpensive. This system can exhaust the solid particles to outside continuously. The motion of the solid particles flowing into the rotating tapered drum is complicated as influenced by centrifugal force, drag force, buoyancy force and so on. Therefore, it is very important to clarify the motion of the particle in the rotating drum not only for performance and drawing of the separator, especially how to move the particles, for example, how long does it take to reach at the wall in the tapered drum.In order to verify the results of numerical simulation, the experiments me carried out in the range of low revolution of the drum(200rpm,300rpm,400rpm and 500rpm)and relatively large particles(1mm and 2mm)by using the flow visualization technique.