The wet feed material to a continuous dryer contains 50%wt water and is dried to 27% by countercurrent airflow. The dried product leaves at the rate of 907.2 kg/h. Fresh air to the system has a ratio of 0.010 kg water/kg dry air. The moist air leaves the drier with a ratio of 0.025 kg water/kg dry air, and part of it is recirculated and mixed with the fresh air. The mixed air enters the dryer at 0.015 kg water/kg dry air. Diagram is needed. Calculate: a. Amount of wet material dried per hour. b. Fresh air flow in kg/h. c. Wet air purged per hour.
The wet feed material to a continuous dryer contains 50%wt water and is dried to 27% by countercurrent airflow. The dried product leaves at the rate of 907.2 kg/h. Fresh air to the system has a ratio of 0.010 kg water/kg dry air. The moist air leaves the drier with a ratio of 0.025 kg water/kg dry air, and part of it is recirculated and mixed with the fresh air. The mixed air enters the dryer at 0.015 kg water/kg dry air. Diagram is needed. Calculate: a. Amount of wet material dried per hour. b. Fresh air flow in kg/h. c. Wet air purged per hour.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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The wet feed material to a continuous dryer contains 50%wt water and is dried to 27% by countercurrent airflow. The dried product leaves at the rate of 907.2 kg/h. Fresh air to the system has a ratio of 0.010 kg water/kg dry air. The moist air leaves the drier with a ratio of 0.025 kg water/kg dry air, and part of it is recirculated and mixed with the fresh air. The mixed air enters the dryer at 0.015 kg water/kg dry air. Diagram is needed. Calculate:
a. Amount of wet material dried per hour.
b. Fresh air flow in kg/h.
c. Wet air purged per hour.
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