Siphon Peeler Centrifuge

Rotary-Siphon Peeler Centrifuges In this type of centrifuge, a partial vacuum is drawn on the outer diameter or tne filter such that the filtrate flows through the cake under both centrifugal force as well as a positive pressure difference of about I atm or less. Thus, a higher rate of filtration takes place due to the increased driving force. 

FIG. 18-167 Siphon peeler centrifuge cross section. (Krauss Maffei Process Technolofry.)... 

Pressurized Siphon Peeler Centrifuge Theoretically, the same principle can further increase driving force with overpressure in the process housing for example, 3-bar overpressure would produce up to 4-bar pressure gradient across the cake. In practice, to date this has not been utilized due to the complexity of the installation. 

Figure 8 Sectional drawing of rotating siphon peeler centrifuge [Alt, 1984]...

Figure 1.17 Photographs of a siphon peeler centrifuge (/eft), with permission from Mitsubishi Kakoki Kaisha (under license from Krauss-Maffei), and a vertical basket centrifuge [right] with permission from Mitsubishi Kakoki Kaisha.

The increased capacity of peeler centrifuges has been obtained by the use of a siphonic action to enhance the effective pressure differentials, as shown in Figure 58.18. Here the filtrate is not centrifuged through the drum perforations immediately after penetrating the filter cake, as occurs in standard peeler centrifuges, but collects behind the filter cloth. This chamber is connected to a ring cup that behaves... 

FIGURE 58.18 Peeler centrifuge with rotary siphon (1, slurry 2, feed pipe 3, cake 4, siphon holes 5, basket 6, slurry 7, wash pipe 8, peeling device 9, peeling knife 10, solid 11, solids chute 12, filtrate 13, liquid layer 14, siphon pipe). (From Mitsubishi Kakoki Kaisha, Ltd., licensed by Kracess Maffei Process Technology AG. With permission.)... 

Increased capacity of peeler centrifuges has also been obtained by use of a siphonic action to enhance the efrbctive pressure dififerentials, as shown in Figure 8.31. 

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