Solid Bowl and Tubular Centrifuges

Other batch-operated sedimenting centrifuges are the tubular centrifuge and the solid open-bowl centrifuge (without discs: Table 3 and Figure 4). Both machines are batch-operated because they do not incorporate the means for continually removing sedimented solids. The tubular centrifuge is configured with a long, small diameter tube capable of rapid rotation

Figure 4 Solid-bowl separator for separating and collecting fine suspended solids in a liquid stream. 1, Product feed; 2, product discharge; 3, bowl insert; 4, removable liner; 5, coolant discharge (bowl); 6, coolant feed (bowl); 7, coolant feed and 8, coolant discharge (upper section of frame); 9, removable liner; 10, coolant discharge and 11, coolant feed (hood); 12, centripetal pump. Reproduced with permission from Westfalia Separator AG, Oelde, Germany.

Figure 4 Solid-bowl separator for separating and collecting fine suspended solids in a liquid stream. 1, Product feed; 2, product discharge; 3, bowl insert; 4, removable liner; 5, coolant discharge (bowl); 6, coolant feed (bowl); 7, coolant feed and 8, coolant discharge (upper section of frame); 9, removable liner; 10, coolant discharge and 11, coolant feed (hood); 12, centripetal pump. Reproduced with permission from Westfalia Separator AG, Oelde, Germany.

and generating very high g forces to above 40 000 g, whereas the solid-bowl/chamber-bowl machines carry a larger diameter bowl and operate in the 5000-10000 g range. The solid-bowl machines are often equipped with a removable liner to facilitate solid removal and centrifuge cleaning, to reduce down time between batches. The narrow tube means that the solid-retaining capacity of the tubular centrifuge is small but the high g force makes the machine useful for collecting small particulate or cell debris in biotechnological applications. They are particularly useful for collecting a valuable partic-ulate present at low concentration which requires high relative centrifugal forces for its isolation. Final cleaning of a fluid stream is another application, particularly for the solid-bowl machine, if the solid to be removed is of a refractory type, which would impose extensive wear on the nozzles or solid ejection ports of a disc stack machine or where high compac-tation of the solids is of value. This latter condition can be very desirable for biotechnological applications where isolation of expensive precipitates is a key function.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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