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Module 4: Liquid Characteristics - Types of Liquids - Answers

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Q icon #1
How would you classify the liquids shown at Points A - H in the scrubber system shown below?

  1. City water
  2. Aqueous liquid
  3. Slurry
  4. Ionic solution

Figure 1 Acid Scrubbing System What Type of Liquid is Found at Each Point A _H A B C D E F G F

A icon
Answer: City water is added to the evaporative cooler, the mist eliminator, and to the mixing tank (to dilute the alkaline liquid) because city water contains essentially no solids.

Point A. City water is added to the evaporative cooler to cool the gas stream. City water is used here because it is undesirable to introduce solids to the gas stream.

Point B. The city water, added to the evaporative cooler, absorbs some solids contained in the gas stream during contact. Therefore the resulting liquid, Liquid B, is classified as an aqueous liquid.

Point C. City water is used in the cyclonic separator to remove build-up on the mist eliminator.

Point D. The purpose of the venturi scrubber is to remove particulate and gaseous emissions in the gas stream. The resulting liquid (Liquid D) containing the absorbed solids is an aqueous liquid.

Point E. The liquid entering the venturi scrubber is classified as an aqueous liquid. This liquid is pumped from the recirculation tank, which is fed by three streams (two streams are aqueous liquids and one is a slurry).

Points F and G. In the mixing tank, city water (Liquid F) is combined with an anhydrous material from the alkaline storage tank to form a slurry (Liquid G).

Point H. The clarifier settles out the suspended solids in the purge stream. The overflow liquid (Liquid H) is classified as an aqueous liquid.

The solids settle to the bottom of the clarifier and the resulting liquid, which is pumped out of the funnel bottom contains very high levels of suspended solids. Therefore, it is considered to be a slurry.

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