B.Sc. Second Year Syllabus.

1. Scrubbers
Dr. Asmita Daspute.
Assistant Professor,
Dept. of Environmental Science,
SBES College Of Science, Aurangabad. (MS)

2. Scrubbers
o Particulate matters are incorporated into liquid droplets and removed
from the gas stream.
o Flue gas made to push up against a down falling water current.
o Particulate matter mix up with water thus falls down and gets
removed.

3. Collection mechanism
• Impingement
• Interception
• Diffusion
• Condensation

4. Types of scrubbers
• Spray towers
• Venturi scrubbers
• Cyclone scrubbers
• Packed scrubbers
• Mechanical scrubbers

5. Spray towers

6. Working Principal
• Impingement and Interception
• Less than 1- 2 µ range particulates are collected

7. Venturi scrubber

8. Venturi scrubber

9. Cyclone scrubber

11. Packed scrubbers

12. Packed scrubbers

13. Mechanical scrubbers

14. Scrubbers
• Advantages
• Simultaneously remove particulates and gaseous pollutants.
• Hot gases can be cooled down.
• Corrosive gases can be recovered and neutralize.
• Disadvantages
• Lot of waste waters produced.
• Poses freezing problem in cold countries.
• Maintenance cost is high when corrosive materials are collected.