By Prof. Dr. Alex C. Hoffmann, Dr. Louis E. Stein (auth.)

Believed to be a publishing first while it used to be initially introduced out, this e-book covers all features of centrifugal fuel cleansing devices.

Now, apparently in a moment, absolutely up to date and revised edition.

These are cyclones used as gas-solid separators for dedusting and as gas-liquid separators for demisting, and as such they're commonplace in industry.

The optimization of cyclone functionality for any given activity is an often-sought target yet is seldom completed in practice.

Understanding cyclone functionality as a functionality of a cyclone's dimension, geometry, feed houses, feed circulation premiums and the method of which it's a half, is vital if one needs to effectively layout, function, troubleshoot or expect cyclone performance.

The info provided during this publication can assist to increase this understanding.

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Additional resources for Gas Cyclones and Swirl Tubes: Principles, Design and Operation

Example text

The word ‘cyclone’ is used as an umbrella designation for all centrifugal separators throughout the scientific and engineering literature, and when using the term in this way swirl tubes can be seen as a special type of ‘cyclone’. We have not been able to avoid using the word ‘cyclone’ in this sense in this book. It should be clear from the context in each case whether the designation ‘cyclone’ refers to centrifugal separators in general, or to cylinder-on-cone cyclones with tangential inlets in particular.

We will be discussing these and some related issues later on. A Ideal Vortex Laws from the Navier-Stokes Equations In this appendix, we will derive the essential equations for swirling flow from the basic equations of fluid mechanics: the Navier-Stokes equations. The Navier-Stokes equations are derived in most textbooks on fluid mechanics, for instance Bird et al. (2002). The ‘equation of continuity’ states that material can neither be generated nor destroyed. 1) with v the fluid velocity vector. 2) where ρ is the density, p the pressure and g the gravitational acceleration.

Internal surfaces may be electropolished to help combat fouling can be fabricated from plate metal or, in the case of smaller units, cast in molds can, in some processes, handle sticky or tacky solids with proper liquid irrigation can separate either solids or liquid particulates; sometimes both in combination with proper design. Some disadvantages of cyclones are: • • • • a low efficiency for particle sizes below their ‘cut size’ when operated under low solids-loading conditions usually higher pressure loss than other separator types, including bag filters, low pressure drop scrubbers, and ESPs subject to erosive wear and fouling if solids being processed are abrasive or ‘sticky’ can operate below expectation if not designed and operated properly.

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