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Paper Information

Journal:   JOURNAL OF AGRICULTURAL SCIENCES   Winter 2004 , Volume 9 , Number 4; Page(s) 117 To 136.
 
Paper: 

DESIGN, CONSTRUCTION AND EVALUATION OF FRUIT JUICE SPRAY DRYER

 
 
Author(s):  GHOBADIAN B., CHEGINI GH., TAVAKOLY T.
 
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Abstract: 

In this research work, the experiment was performed with laboratory spray dryer on orange juice for achieving primary design data. Results indicate that for drying of orange juice the optimum feeding temperature is 20-35 °C, outlet air temperature is 70 °C, maximum inlet air temperature is 170 °C and powder sticky point temperature for moisture content of 2%, is 44°C. Also the main cause of dryer walls deposit is the walls high temperature. With these results, a spray dryer of two-layer chamber with capacity of 15 kg/h powder for fruit juice was designed constructed and evaluated.
The constructed dryer is able to control of wall temperature, inlet and outlet air temperature and atomizer speed. Evaluation of dryer indicated that yield of dryer is 65 to 90% and wall deposit is less of 15%, in the variation of inlet air temperature. In the all of experiment, the temperature of walls chamber was less of powder sticky point temperature, and walls deposit very decreased in comprise with laboratory spray dryer. The results of statistical analysis of data show that the parameters of inlet air temperature and feed flow rate have significant effect on the dryer yield and wall deposit individually and jointly. In constant of inlet air temperature, with increasing of feed flow rate, the dryer yield is decreased and wall deposit is increased.

 
Keyword(s): SPRAY DRYER, FRUIT JUICE POWDER, DESIGN, CONSTRUCT AND EVALALUTE
 
References: 
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