Discussion
Statement I: A venturi scrubber can collect fine particulate at low pressure drop.
Statement II: The contacting power principle relates wet scrubber efficiency to the power expended in contact.
In the light of the above statements, choose the correct answer.
Answer: C
Correct answer: Statement I is incorrect but Statement II is correct
Statement II is correct and it contradicts statement I. The contacting power principle holds that the efficiency of a wet scrubber depends chiefly on the power expended in bringing gas and liquid into contact, almost regardless of how that power is applied. Fine particle collection therefore requires a high pressure drop - a venturi runs at 5 to 20 kPa - and cannot be had cheaply.
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