MODULE 5: ASSIGNMENT ENVM 590: AIR POLLUTION CONTROL. Module 5:Particulate Control 1. For a given dust loading initially and twoidentical collectors in series, why is the overall collectionefficiency for the second usually less than that of the firstcollector? 2. An industrial furnace burns No. 4 residual oil with aheating value of 135,000 Btu/gal. Based on the emission factorsgiven in Table 5-4, is a particulate collector required to meet astate emission standard of 0.10 lb/106 Btu? 3. Two particulatecollectors are in series. The fractional efficiency for size dp inthe upstream device is 80 percent, and for the downstream devicethe efficiency is 60 percent. Find the overall removal efficiencyfor size dp. 4. What is the required minimum efficiency of anelectrostatic precipitator used as the second collector, when it ispreceded by a cyclone separator having an efficiency of 80% if thedesired overall efficiency is 98 %? 5. A spreader stoker is used toburn coal containing 8 per cent ash. The flue gas from burning 1 lbof coal is 170 ft3. What is the maximum dust loading of PM incombustion gas in grains per cubic foot?
