Module 5

1
Module 5

• Damage Control

2
Terminal Objectives

• Upon the successful completion of this module,
  participants will be able to describe methods
  used to prevent or control damage from a
  combustible dust explosion.

3
Enabling Objectives

• Discuss types of damage control systems.
• Discuss emergency response planning.

4
Damage Control Systems

• Monitoring/suppressing/eliminating dust
• Various types of systems
• Spark ember detection
• Extinguishing
• Hazards separation/segregation
• Deflagration venting
• Pressure relief venting
• Specialized fire suppression

5
Spark Ember Detection

• Eliminate early causes of fires/explosions
• Detects spark/ember IR radiation
• Fire prevention method
• Dust collectors
• Pneumatic conveying systems

6
Spark Ember Detection

• System activates countermeasures
• Deluge valves
• Abort gates
• Alarm systems
• Automatic machinery shutdown
• Extinguishing devices

7
Extinguishing System

• Releases fine mist of water
• Sparks/embers extinguished without interrupting
  production
• Greatly reduces
• Personnel injury
• Equipment damage
• Downtime

8
Hazard Separation

• Isolates combustible dust hazard
• Puts distance between dust and hazard
• Implement system during design/remodeling

9
Hazard Segregation

• Used when separation is not possible
• Isolates hazard by using a barrier
• Implementation without burdening entire
  plant/building

10
Deflagration Venting

• Controls damage caused by explosions
• Vents release expanding gases
• Gases reduce pressure below danger levels

11
Pressure Relief Venting

• Same premise as deflagration venting
• Provides pressure relief to prevent explosions

12
Specialized Fire Suppression Systems

• Sprinklers
• Most standard form of fire suppression
• Heat activated
• Carbon Dioxide
• Will not damage electronic equipment
• Reduces oxygen levels

13
Dry Powder Extinguishers

• Standard/Multi-purpose
• Safe for most kinds of fires
• Knocks down the flames
• Best for fires with flammable liquids/gases

14
Deluge Foam

• System is connected to a water supply
• Valve opened by smoke/heat detection system
• Used in high hazard areas
• Chemical storage
• Processing facilities

15
Emergency Response Planning

• Requires detailed planning
• 3 phases of planning
• Pre-explosion
• Dust explosion
• Post explosion

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Pre-Explosion

• Develop Emergency Action Plan (EAP)
• Take special consideration for combustible dust

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Dust Explosion

• Implement EAP
• Evacuate area
• NOT incipient fire
• Explosions can be initiated by incipient fire
• Ignited materials can travel

18
Dust Explosion

• Incipient fire brigades
• Limited training
• Typically hose streams
• PPE
• Categorized as fully involved fire
• Fire department response
• Specialized training

19
Post-Explosion

• Initiate investigation when safe
• Most evidence is destroyed
• Only 50 of cases determine cause
• Collect any dust samples
• Change in working environment
• Paranoia, fear, and stress
• Perceived risk
• apprehension

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Post-Explosion

• Increased interest
• Community
• Regulatory industries
• Communication from organization
• Public relations
• Choosing a speaker

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Post-Explosion

• Resuming normal operations
• Recovery
• Rebuilding with safety in mind
• Strong leadership/direction needed

22
Next Module

• Module 6 Facility Dust Assessment