Detergent solutions are transformed into dry powders using a ________________________?
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Answer: A. Spray dryer
Explanation
Spray dryers provide massive surface area by atomizing liquid detergent into microscopic droplets. Hot air contacting these droplets causes instantaneous solvent evaporation, producing dry hollow spherical beads. Rapid drying kinetics prevent thermal degradation while transforming liquid solutions into free-flowing powders. Spray drying is a continuous industrial process converting liquid feeds into dry powder particulate forms. Atomization devices create fine sprays inside large drying chambers to maximize heat and mass transfer. Detergent manufacturing requires uniform powder density and solubility properties achieved via spray drying.
Consumer goods manufacturers produce tons of laundry detergent powders daily using massive spray towers. Particle size distribution and bulk density are controlled by adjusting atomizer wheel speeds and air temperatures. Similar spray drying techniques apply in dairy, pharmaceutical, and chemical powder production. Option B is wrong because spouted bed dryers handle coarse granular particles rather than liquid detergent feeds. Option C is incorrect since tunnel dryers process solid molded shapes rather than atomized liquid slurries. Option D is incorrect because open pans cannot provide the rapid atomization needed for detergent powders.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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