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Advanced Evaluation Techniques Regarding Combustible Dust

Advanced Evaluation Techniques Regarding Combustible Dust. Inspections for “Combustible Dust” and their contributory conditions are mostly “VISUAL”. “Advanced” equipment evaluations are non- mandatory, BUT are highly effective from a Risk Minimization Perspective.

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Advanced Evaluation Techniques Regarding Combustible Dust

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  1. Advanced Evaluation Techniques Regarding Combustible Dust • Inspections for “Combustible Dust” and their contributory conditions are mostly “VISUAL”. • “Advanced” equipment evaluations are non- mandatory, BUT are highly effective from a Risk Minimization Perspective.

  2. Basis of IR Thermographic Imagery (TI) • Thermographic Imagery (TI) is an evaluation technique that takes advantage of the physical properties of matter…. • To understand this, you need a BRIEF REVIEW about the fundamentals of PHYSICS.. .

  3. In the INFRARED Universe, all things GREAT and small are equal!

  4. What’s the Basis of This Equality? • ALL matter is made up of ATOMS, MOLECULES, as a singularity or in and groups of them! • Non-LIVING MATTER: Atoms → Compounds, or Pure Elements → Separately, or with others. • “LIVING” MATTER: Atoms → Compounds → Simple celled organelles → Cells → Tissues → Organs→ Whole Body. • But there’s a COMMONALITY… • BOTH types of matter EMIT Infrared Radiation (IR). • Their IR “fingerprints” can be quantified!

  5. Question – What EXACTLY is Infrared Radiation? Answer – Wave-like Energy (radiation) from the Non-Ionizing Part of The ELECTROMAGNETIC SPECTRUM!

  6. Question – WHEN is Infrared Radiation (IR) NOT emitted? Answer - Anytime Matter is at ABSOLUTE ZERO (- 460 *F)

  7. How Far Does One Have To Go To “Experience” Absolute “0”? Neptune, The FARTHEST Planet from our Sun in our solar system.. 4.5 BILLION Miles away, and -346 *F!

  8. “Temperature”, and Emitted IR, are all Relative! The relationship between Neptune and Absolute “0” is: -346*F compared to -460*F Comparatively, Neptune would be like A Day at a Tropical Beach! (at 114 *F)

  9. Question – Can Infrared Radiation be seen? Answer – NO, unless we use a TI (an IR Camera) • Our EYES and BRAINS are NOT “tuned” to detect and interpret IR radiation. • As a direct result, we have to use an IR camera to “capture” it. • A TI Imager captures and measures IR radiation (energy) and interprets it using “color” so we can understand it. • Results are relative to surroundings and other objects, and temperature scaled relative to “absolute zero”.

  10. Thermographic Imager (TI) Data Evaluation Primer – An Example • TI in general can be used to detect the IR “fingerprint” of EVERY OBJECT that exists. • Data quality depends on Focus, Reflectance, and Emissivity. • Understanding these factors characterizes the true condition of the object of interest. • Fortunately, painted metal objects and living matter (organisms) result in GREAT images and data!

  11. The TI CAMERA – Handle It!

  12. What are the Benefits of Thermographic Imagery (ATI)? • 1-Detects INFRARED RADIATION in our industrial environment. • 2-Allows Non-Destructive Image Analysis in “Real Time”. • 3-Shows Equipment “Anomalies” that are direct indicators of “Combustible Dust” conditions to avoid. • 4-Creates and records an image based DATA ARCHIVE, and its temperature record.

  13. SPECIFIC TI APPLICATIONS Relating to “Combustible Dust” • TI detects heat differences that MAY relate to AIR LEAKS from ductwork containing wood dust. • AIR LEAKS = Potential sources of dust escape & buildup. • TI directly approximates EQUIPMENT TEMPERATURE. • EQUIPMENT TEMPERATURE = Ignition source identification that may be at or approaching the auto-ignition temperature of wood dust! (more on this later)

  14. 7 - Practical TI Applications in Timber Products ManufacturingLet’s See Some Images!

  15. A Typical 120 Volt Electrical (e- Outlet)…

  16. A “Wood Parts” Conveyor Belt with a Heated Surface Near a Bearing (left side)…

  17. TYPICAL CYCLONE EXHAUST in VISUAL in INFRARED

  18. TYPICAL e-DISCONNECTS – Example #1 In VISUAL In INFRARED

  19. LOCAL e- DISCONNECTS - Example #2 In VISUAL In INFRARED

  20. METAL HALIDE CEILING LIGHT In VISUAL In INFRARED

  21. TYPICAL BELT & PULLEY at 480 VOLT DRIVE MOTOR In VISUAL In INFRARED

  22. EQUIPMENT ANALYSIS (CONVEYOR BELT) for DETECTION of HEAT BUILD-UP Conveyor belt at left end has a HOT bearing – possible problem Metal roller and conveyor belt is HOT due to friction.

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