GATE CE 2016 Set 1 — Question 29
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Environmental Engineering → Air Pollution → Particulate Matter Control
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Question
It was decided to construct a fabric filter, using bags of 0.45 m diameter and 7.5 m long, for removing industrial stack gas containing particulates. The expected rate of airflow into the filter is 10 m³/s. If the filtering velocity is 2.0 m/min, the minimum number of bags (rounded to nearest higher integer) required for continuous cleaning operation is
Correct answer
(B) 29
Solution
1.Calculate the surface area of a single bag ():
2.Convert filtering velocity () to m/s:
3.Calculate the total surface area required ():
4.Calculate the number of bags ():
5.Rounding to the nearest higher integer:
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