For achieving rapid drying rate in a spray dryer, the diameter of the particles in the feed should be in the range of _______________ microns (1 mm = 1000 microns)?
Correct answer: B. 10-60
- A. 1-5
- B. 10-60
- C. 200-300
- D. > 500
Explanation
Spray dryers atomize the feed into fine droplets, commonly in the approximate 10 to 60 micrometre range, giving a very large surface area for rapid evaporation. Particles hundreds of micrometres wide would dry more slowly and may remain wet internally.
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