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Screen scroll centrifuge : ウィキペディア英語版
Screen scroll centrifuge
Screen scroll centrifuge is a filtering or screen centrifuge which is also known as worm screen or conveyor discharge centrifuge. This centrifuge was first introduced in the midst of 19th century. After developing new technologies over the decades, it is now one of the widely used processes in many industries for the separation of crystalline, granular or fibrous materials from a solid-liquid mixture. Also, this process is considered to dry the solid material. This process has been some of the most frequently seen within, especially, coal preparation industry. Moreover, it can be found in other industries such as chemical, environmental, food and other mining fields.
==Basic fundamentals==
Screen scroll centrifuge is a filtering centrifuge which separates solids and liquid from a solid-liquid mixture. This type of centrifuge is commonly used with a continuous process in which slurry containing both solid and liquid is continuously fed into and continuously discharged from the centrifuge. In a typical screen scroll centrifuge, the basic principle is that entering feed is separated into liquid and solids as two products. The feed is transported from small to larger diameter end of frustoconical basket by the inclination of the screen basket and slightly different speed of the scraper worm.〔B. J. Anderson and D. S. Arand, “Dual-stream juice processing for recovering juice solids from extractor core material”. United States Patent EP0414964, 14 July 1993.〕 The solid material retained on the screen is moved along the cone via an internal screw conveyor while the liquid output is obtained due to centrifugal force causes the feed slurry to pass through the screen openings.〔S. Tarleton and R. Wakeman, Filtration: Equipment Selection, Modelling and Process Simulation, 1st ed., Elsevier, 1999.〕 Furthermore, screen scroll centrifuge may rotate either in horizontal or vertical position.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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