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Spray Dryer Checklist

  • 1. Product Testing Complete?<br>• Layer Ignition Temperature?<br>• Minimum Ignition Temperature?<br>• Minimum Ignition Energy?<br>• Minimum Explosive Concentration?<br>• Critical Thickness for SeliIgnition?<br>• Kst?<br>• Pmax?

  • 2. Process Isolation - Spray Dryingoperations within its own discreet processing area separated from other parts of the factory by a 2hr fire wall or a separation distance of 25m?

  • 3. Mr Inlets? - Adequate filtration of inlet air?

  • 4. Mr Heating?<br>• Direct air heating avoided?<br>• Flame/spark arrestors on inlet air?

  • 5. Atomisers?<br>• Vibration monitoring on centrifugal disc atomisers?<br>• Safe trajectories for pressurised jet atomisers defined and plant configured to ensure unsafe trajectories cannot be set?

  • 5. Atomisers?<br>• Vibration monitoring on centrifugal disc atomisers?<br>• Safe trajectories for pressurised jet atomisers defined and plant configured to ensure unsafe trajectories cannot be set?<br>

  • 6. Dust Extraction Equipment?<br>• Externally sited or in a separate fire compartment?<br>• Explosion relief adequate?<br>• Fire detection equipment installed?<br>• Sprinkler or deluge system fitted?

  • 7. Fans<br>• Vibration monitoring fitted?<br>• Safe access for inspection/cleaning provided?

  • 8. Fines Return<br>Downward trajectory or other measures to prevent accumulation on return line?

  • 9. Adequate measures to prevent accumulation/build-up of powder?

  • 10. Temperaturecontrol?<br>• Temperatures continuously monitored within the various zones within the plant?<br>• High temperature alarm?<br>• Very High temperature shut down fitted that shuts down the product feed, inlet air and sifter?

  • 11. DSEAR & Suitable Electrical Equipment<br>• DSEAR Assessment completed?<br>• Electrical equipment suitable for use in hazardous atmospheres?<br>• Equipment with appropriate T Class installed?<br>• Suitably IP rated equipment specified?

  • 12. Earthing & Lighting Protection system<br>• All items of plant and all components must be connected to each other and to earth by a low resistance electrical path?<br>• Earth continuity checked and confirmed as part of routine plant maintenance?<br>• Building features lightning protection system?<br>• Lighting protection system inspected and tested on at least an annual basis?

  • 13 Flexible Hoses<br>Hoses are ATEX rated and also will not burst at pressures below that of explosion relief mechanisms?

  • 14 Automatic Fire Detection<br>• Factory area protected by a suitable automatic fire detection system that meets BS 5839 pt 1 -P1.<br>• Spray dryer protected by Carbon Monoxide detection?<br>• Spray dryer protected by spark detection?

  • 15 Fire Fighting Systems<br>• The spray dryer, extract ducts, fluid bed dryer, cyclones and bag filters (if fitted) are protected by a suitably designed fixed fire protection system?<br>• There are suitable processes in place for the inspection, maintenance and testing of these systems?

  • 16 Explosion Relief / Containment<br>Process plant designed to eithercontain the pressure of an explosion or safely relieve the pressure to a safe location?

  • 17 Explosion Suppression<br>A suitable explosion suppression system is installed within the spray dryer and associated ductwork?

  • 18 Explosion Propagation<br>There are suitable measures to prevent propagation of an explosion through the process plant?

  • 19 Safe start-up/shut down procedures are established?

  • 20 Adequate programmes of plant maintenance established?

  • 21 Adequate programmes of plant cleaning operate including high level areas?

  • 22 There are no/few fugitive dust emissions from the process?

  • 23 Hot works are managed in accordance with Aviva's Loss Prevention Standard?

  • 24 There are appropriate programmes of operator training?

  • 25 Safe procedures for dealing with blockages?

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