Discussion
Arrange these steps in selecting a particulate control device:
1. Characterise the gas stream and the particle size distribution
2. Establish the outlet concentration the standard requires
3. Identify the device types capable of that efficiency on that size range
4. Compare capital cost, pressure drop and effluent handling for each
Select the correct sequence.
Answer: B
Size distribution and gas condition together rule most options in or out before any cost is considered. Choosing a device before characterising the stream is how baghouses end up on gases above their fabric's temperature limit.
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