1. Anthony Ross Infrared Imaging of Black Liquor Droplets Team Members: Aaron Brandt Will Carter Brent Illingworth Matt Travis Academic Advisor: Dr. David Sailor Industry Advisor: Dan Higgins, P.E.

2. Background Kraft paper pulping process schematic

3. Mission Design an optical assembly Images are used to generate data Data is used to improve boiler model

4. Project timeline

5. Existing sizing techniques Laser – Detector Systems Laser passes through spray Photodetectors gather scattered light

6. Existing sizing techniques cont’ Imaging systems Light focused onto CCD to produce digital image Software analyzes images and outputs size Distance to droplets must be known

7. Sizing technique to be used Infrared imaging system Other systems infeasible Camera currently used for maintenance High contrast due to temperature difference Additional marketability of IR camera

8. Major requirements Depth of focus must be short enough Focal length must be adjustable and known Viewing angle must be adjustable Adequate cooling and cleaning

9. Depth of focus must be short enough Software will only measure droplets that are in focus Focal length can accurately be used as the distance to droplets Optics aperture affects depth of focus

10. Focal length must be adjustable and known Exact measurement region is unknown Needs to adapt to different boiler configurations Must be known to scale droplet image size to actual size Affects depth of focus & magnification

11. Focal length adjustment Dual lens system allows for focus adjustment Fine adjustment of rear lens necessary

12. Viewing angle must be adjustable Optics system will be inserted above spray

13. Viewing angle must be adjustable Mirror based system Fiber optics based system

14. Fiber optic imaging Fiber bundles Flexible Coherent Light entering and exiting must be parallel Many components available

15. Viewing Angle Adjustment Bracket assembly Planetary gear assembly

16. Cooling/Cleaning Compressed air on sight Safe to use in boiler Air purge system for lens cleaning Air flow limited by compressed air pressure One or two air ports could be used

17. Decision Matrix

18. Future considerations Optics system –Dimensions –Calibration –Depth of focus –Utilize manufacturer expertise Cooling system –Detailed analysis Thermal expansion –Material selection

19. Conclusion Existing sizing methods analyzed Infrared imaging confirmed as most feasible Major requirements established Possible solutions compared Overall concept decided

20. Complete Concept

21. Questions?