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Comment PDF Separation Processes

Cartridge Filtration Principles For the CPI

By John Hampton, Filtration Technology Corp. |

    Improvements in cartridge dirt-holding capacity has led to new designs, as well as to new equations for filter selection and specification, which are linked to dramatic improvements in the time between turnarounds and filter changeout. Cartridge filtration serves the process industries in a host of applications. Ironically, however, filtration principles are not taught adequately in many university chemical-engineering curricula, with the result that the graduate lacks sufficient skills to design or select a filtration system, whether for cartridge filtration or otherwise. In this context, “system” is indeed the correct word, because a series of fluid-particle separation steps is often required to achieve solids removal from a stream, regardless of whether the solid is the desired end-product or, instead, the impurity.     Matching filter to process A filtration unit should be chosen so as to match particulate-removal requirements to the end use product, or to the effluent guidelines. The type of filtration used for a particular application will not always be the same, and one must closely look at the overall economics. For instance, filtration during electronic chip manufacture must meet higher…
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