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Module 1: Basic Concepts - Material Balance - Practice Problems

 
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Instructions:
Work these problems on a sheet of paper and check your answers against those provided below.

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Q icon #1
There are three separate furnaces generating pollutant-laden gas streams. The gas flow rates from the three sources are 1,500 lbm/min, 4,500 lbm/min, and 2,000 lbm/min. What is the total flow rate going to the fabric filter serving these three sources? See Figure 3:


A icon
Answer: 8,000 lbm/min

Solution:
equation 1

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Q icon #2
A wet scrubbing system has three separate inlet streams. The mass flow rates in these inlet streams are 100 lbm/min, 58 lbm/min, and 74 lbm/min. The water spray into the scrubber is 60 lbm/min and some of this spray evaporates and leaves with the gas stream. The water stream leaving the scrubber is 49 lbm/min. What is the mass of the gas stream leaving the scrubber?

Figure 4mb

A icon
Answer: 243 lbm/min

Solution:
  1. Calculate the total inlet mass flow rate.
    equation 2-1

  2. Calculate the total outlet mass flow rate.
    equation 2-2

  3. Calculate the outlet gas stream mass flow rate.
    equation 2-3

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Material Balance
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Kinetics

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