METHOD AND APPARATUS FOR SEPARATING FAST SETTLING PARTICLES FROM SLOW SETTLING PARTICLES

A hydroseparator for separating particles based on the differences in settling rates such as for separating fly ash from gypsum includes a substantially cylindrical side wall closed at its bottom end by a floor. A laminar upflow is created through the hydroseparator by adding dilution water to the b...

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1. Verfasser: PHILLIP G. MORGAN
Format: Patent
Sprache:eng ; spa
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Zusammenfassung:A hydroseparator for separating particles based on the differences in settling rates such as for separating fly ash from gypsum includes a substantially cylindrical side wall closed at its bottom end by a floor. A laminar upflow is created through the hydroseparator by adding dilution water to the bottom of the hydroseparator and removing most of the added dilution water from the top of the hydroseparator. The remaining volume of liquid is removed in an underflow. The hydroseparator is divided into at least two sections by a baffle that extends about the interior of the side wall. An inlet is disposed in the center of the hydroseparator slightly above the baffle such that the material added to the hydroseparator to be separated is inserted into the section of the hydroseparator completely surrounded by the baffle. The velocity of the upflow is controlled such that it is not fast enough to cause the faster-settling gypsum particles to rise but is fast enough to cause the slower-settlin g fly ash particles to rise with the upflow. The upflow thus separates the fly ash from the gypsum and floats the fly ash to the top of the hydroseparator where it is removed in the overflow. An agitator is provided in the lower portion of the hydroseparator to evenly distribute wash water and to keep the gypsum fluid. Un hidroseparador para separar particulas con base en las diferencias de velocidad de sedimentacion, por ejemplo para separar la ceniza del yeso, incluye una pared lateral practicamente cilindrica encerrada en su extremo inferior mediante un piso. Un flujo ascendente laminar se crea a traves del hidroseparador al agregar agua de dilucion a la parte inferior del hidroseparador y al eliminar la mayoria del agua de dilucion anadida de la parte superior del hidroseparador. El hidroseparador esta dividido en al menos dos secciones mediante una mampara que se extiende alrededor del interior de la pared lateral. En el centro del hidroseparador esta ubicada una entrada ligeramente por encima de la mampara, de tal forma que el material que se va a separar y, que se anadio al hidroseparador se inserta en la seccion del hidroseparador totalmente rodeada por la mampara. La velocidad del flujo ascendente se controla. de tal forma que no sea lo suficientemente rapida para provocar que las particulas de yeso de mayor velocidad. de sedimentacion se eleven pero que sea lo suficientemente rapida para provocar que las particulas de ceniza que tienen menor velocidad de sedimentaci