Module 2

1. Module 2 Dust Control

2. Terminal Objectives Upon the successful completion of this module, participants will be able to explain combustible dust control techniques.

3. Enabling Objectives • Explain the purpose of the pressure relief valve. • Discuss methods used to minimize dust escape. • Discuss dust collection methods. • Identify procedures necessary to prevent dust accumulation.

4. Pressure Release Valve • PRV • Safety device • Releases in case of overpressure

5. Dust Escape and Accumulation-Design • Utilize surfaces that minimize dust accumulation • Utilize surfaces that facilitate cleaning • Provide access to hidden areas • Locate PRVs away from dust hazard areas

6. Dust Escape and Accumulation-Equipment Integrity • Dust generating equipment • Maintenance of equipment is critical • Clean equipment regularly

7. Dust Collection • Cleanup dust at regular intervals • ONLY USE approved vacuum cleaners • Bag house • Cartridge • Cyclone • Portable • Wet

8. Dust Collection • Bag House • Effective on abrasive, sticky or curly particles • Effective with heavy dust loads • Cartridge • Continuous collection/removal of airborne dust • Allows collection without shutting down • Used on broad spectrum of industrial processes

9. Dust Collection • Cyclone • Separates/removes medium to large particles • Portable • Uses extractor arm to facilitate removal • Wet • Safe collection of hazardous/explosive dusts

10. Cyclone Dust Control

11. Cleanup Methods • Use methods that do not generate dust clouds • Safe removal methods • Wet method/water removal • Explosion-proof industrial vacuum • Small areas may be wiped clean

12. Vacuum Cleaner Filter • Clean/replace according to manufacturer’s instructions • Maintenance-free filters

13. Dust Accumulation Prevention • Implement hazardous dust inspection • Implement housekeeping plan • Implement control program • Written plan • Establish frequency and methods

14. Next Module Module 3: Ignition Control