The dust loading of a gas from a lime kiln is 3.25 g/scf. The permitted exhaust loading is 0.11 g/scf. (a) What is the collection efficiency required to obtain the desired exit dust loading if one collector is to be used? (b) What is the efficiency required if two collectors are used in series, each with the same efficiency (c) What is the efficiency required for the first collector of two in series, if the efficiency of the second unit is only 75% that of the first unit? Note: scf- standard cubic 3.

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