No duct, no plugged & abrasion problems, lower power cost & many other benefits.

1. Dust control with DLMV
- Paulus Hartanto -

2. Material handling & bin venting
• Mechanical handling
• Pneumatic conveying
– Dilute Lean phase
– Dense & two-phase
– Bulk truck
– Air slides

3. Mechanical handling
• Belt Conveyors
• Bucket Elevators
• Vibratory Feeders
• Screw Conveyor
• Grab Unloading hoppers
• Mechanically filled bins

4. Central system approach

5. Insertable approach
• Eliminates Ducting
– No duct abrasion
– No plugged ducts
– Lower power cost
• No one else has it
• Many references

6. Conveyor transfer point

7. Conveyor transfer point

8. Tripper conveyor

9. Bucket elevator
• 0.50 m3/s per m2 of
casing cross section
• Inlet control
• High “take off” for
hot elevators

10. Bucket elevator

11. Vibratory feeder
• 500 cfm/ft of
conveyor width
• 2800 m3/hr per m of
conveyor width

12. Screw conveyor
• Just maintain a negative
• Vented through adjacent equipment
• Direct vented
– Tapered connection
– 350 cfm (600 m3/hr)
– Bleed in connection

13. Grab unloader hopper

14. Bin venting typical system
Unloading Venting
Freeboard
Consumption

15. Mechanically filled bin

16. Pneumatic conveying
• Dilute Phase
• Dense Phase & Two Phase
• Bulk Truck
• Air Slides

17. Bulk truck unloading

18. Pneumatic receiver

19. Bin venting rule of thumb
• Keep the bin under slight (-) pressure
• Continuous-duty collectors preferred
• Use downtime cleaning when required
• No explosion vents on Bin Vent

20. Air slide

21. Filter sizing
The Filter Size is Selected By :
Air Volume m3/min
Filter Size (area) m2 = ---------------------------------------------
Filtration Velocity m/min/m2
Example: 120 m3/min
---------------- = 80 m2 Filter
1.5 m/min/m2

22. Thank you