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The Spray Drying Process
The Spray Drying Process 2024-08-06 The spray drying process is older than might commonly be imagined.   Earliest descriptions date from 1860 with the first patented design  recorded in 1872. The basic idea of spray drying is the production of highly  dispersed powders from a fluid feed by evaporating the solvent. This is  achieved by mixing a heated gas with an atomized (sprayed) fluid of high  surface-to-mass ratio droplets, ideally of equal size, within a vessel (drying  chamber), causing the solvent to evaporate uniformly and quickly through direct  contact. Spray drying can be used in a wide range of applications where the  production of a free-flowing powder is required. This method of dehydration has  become the mo…
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Design and Control of Spray Dryer
Design and Control of Spray Dryer 2024-08-06 The challenges facing both designers and users are to increase production,  improve powder quality and reduce costs. This requires an understanding of the  process and a robust control implementation.  Spray drying consists of the following phases:Feed  preparation: This can be a homogenous, pumpable and free from impurities  solution, suspension or paste.Atomization  (transforming the feed into droplets): Most critical step in the process. The  degree of atomization controls the drying rate and therefore the dryer size.  The most commonly used atomization techniques are:1.  Pressure nozzle atomization: Spray created by forcing the fluid through an  orifice. This is an energy efficient met…
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