Powdered milk is produced in a spray dryer 6.0m in diameter by 6.0m high. Air enters at 167 deg C and -50.0cmH_(2)O (gauge). The milk fed to the atomizer contains 67.0% water by mass, all of which evaporates. The outlet gas contains 12.00 mole% water and leaves the chamber at 89.0 deg C and 1atm (absolute) at a rate of 323(m^(3))/(m)in. Calculate

Question

Powdered milk is produced in a spray dryer

6.0m

in diameter by

6.0m

high. Air enters at

167\deg C

and

-50.0cmH_(2)O

(gauge). The milk fed to the atomizer contains

67.0%

water by mass, all of which evaporates. The outlet gas contains 12.00 mole% water and leaves the chamber at

89.0\deg C

and

1atm

(absolute) at a rate of

323(m^(3))/(m)in

. Calculate the production rate of dried milk and the volumetric flow rate of the inlet air. Estimate the upward velocity of air (

(m)/(s)

) at the bottom of the dryer.

m_(m)^(˙),=,k(g)/(m)in
V_(i)^(˙),=i,(m^(3))/(m)in
v_(i),=(m)/(s)

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