Decanting centrifuges

Decanter Centrifuges The decanter centrifuge (also known as the solid-bowl or scrtnl centrifuge) consists of a sohd bowl with a... 

Decanter centrifuges with mechanical shaft-to-casing seals are available for pressure containment up to 1,1 VIPa (150 p.sig), similar to the nozzle-disk centrifuge. They can be built to operate at temperatures from -87 to -t-2fi0°(i (-125 to -t-500°F),... 

Scratch resistance, 19 582 SCR catalysts. See also Selective catalytic reduction (SCR) selection of, 20 100-101 types of, 20 99-100 SCR DENO plants, 20 101 Screen bowl decanter centrifuge,... 

Figure 9.12. Solid-bowl decanter centrifuge-principles of operation...

A variant of the decanting centrifuge is the screen bowl decanter, shown in Figures 9.13 and 9.14. In this unit a further perforated section is attached to the smaller diameter end of the conical section. This is known as the screen and allows further drying and/or washing of the solids to take place. 

Figure 9.13. Screen bowl decanter centrifuge (cover removed)...

Decanter centrifuge Suitable for slurry with high solids concentration, high input of slurry, continuous operation Low centrifugal force... 

With respect to leachate pre-treatment, different methods have been reported in the literature involving steps such as decantation, centrifugation, filtration and pH adjustment. Specific pre-treatment may well have some influence on chemical or ecotoxicological results (Isidori et ah, 2003). Moreover, some bioassays can only be run on 0.45 pm filtered leachates (e.g. Ames test) or those having undergone pH adjustment (e.g., Microtox test). 

A continuous decanter centrifuge may be acceptable for the operation. The separation of solids is controlled by the centrifugal force, the bowel radius, and the effective length. The specification depends on the desired products maximum clarification, classification, or solids dryness. 

Virgin olive oils are oils obtained from the fruit of the olive tree by solely mechanical, or other physical means under conditions, particularly thermal, that do not lead to alterations in the oil, such oil not having undergone any treatment other than washing, decantation, centrifugation and filtration. Thus there is the total exclusion of oils obtained using solvents or re-esterification processes, and any mixtures with oils of other kinds. 

Decanter centrifuges are well suited to high solids concentrations at feed rates between 1 and 100 m3/hr. They cannot achieve such high standards of separation as a disc stack machine, and are more difficult to engineer as truly hygienic or contained units. They are suitable for continuous operation and can discharge solids continuously. 

Isolation and purification of substances filtration, decantation, centrifugation, magnetic separation, crystallization, distillation. 

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