2. Filtration Packing density/solidity Fiber filter For fiber filter,  < 0.1 For woven filter,  ~ 0.3 Q: Do filters function simply as sieves (to collect particles larger than the sieve spacing)?

3. Theodore & Buonicore, Air Pollution Control Equipment, CRC Press , 1988.

4. Shaker Baghouse Theodore & Buonicore, Air Pollution Control Equipment, CRC Press , 1988. Shaker Cleaning Parameters Q: What are the common problems encountered?

5. Reverse-Air Q: Pros and Cons? Cleaning dust on baghouse walls by traditional sledge-hammering

6. Reverse-Air Cleaning Parameters Reverse-Jet

7. Pulse-Jet Q: How can the blown-away particles by the on-line cleaning process be collected? Q: Felted fabric or woven fabric?

8. Air/Cloth Ratio Filtration velocity (average velocity) Q: If thicker fabric is needed to sustain the high force, is its operating cost higher?

14. Parallel Flow Operation Q: How do you determine when to clean?

15. Pressure Drop (Filter Drag Model) Areal Dust Density Filter drag K 1 & K 2 to be determined empirically (resistance factor)  P f : fabric pressure drop  P f : particle layer pressure drop  P s : structure pressure drop Q: What is the pressure drop after 100 minutes of operation? L = 5 g/m 3 and V = 0.9 m/min. K 2 K 1 990 60 690 30 610 20 505 10 380 5 150 0  P, Pa Time (min)

16. Time to clean Flow rate Filtering velocity Q: What are the parameters that affect our decision on the number of compartments to be used?

17. Areal dust density Filter drag Actual filtering velocity Pressure drop

19. Quick Reflection