CVG 2132 Lecture Notes - Lecture 1: Urban Air, Css Box Model, Mok
15 Mar 2017
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Document Summary
This problem illustrates how a mass balance calculation can be used to check the results of an air pollution monitoring study. A fabric filter (bag filter) is used to remove the dust from the inlet gas stream so that outlet gas stream meets the required emission standards in cement, fertilizer and other chemical industries. During an air pollution monitoring study, the inlet gas stream to a bag filter is 1,69,920 m3/hr and the dust loading is 4577 mg/m3. The outlet gas stream from the bag filter is 1,85,040 m3/hr and the dust loading is 57 mg/m3. Based on dust balance, mass (in) = mass (out) Inlet gas stream dust = outlet gas stream dust + hopper ash: calculate the inlet and outlet dust quantities in kg per hour. Inlet dust quantity = 169920 (m3/hr) x 4577 (mg/m3) x 1/1000000 (kg/mg) = 777. 7 kg/hr.
