1. Nutsche Filter Control

2. Agenda Introduction Nutsche Filter Industries
Concepts of Image Processing
Equipment
Calibration
Real Time Measurement
Output Data / Process Control
Visual Verification
Demonstrations
Conclusion
Questions & Answers

3. Introduction
Vision Based Approach for Non-Contact Cake Detection and Level Measurement for Nutsche Filters in Weather Proof and Explosion Proof Areas

4. What is a Nutsche Filter?
A Nutsche Filter is a machine used to separate solids from a slurry by using positive pressure. Liquid of the slurry is forced through a screen or cloth so that the solids can be collected.

5. Typical Nutsche Filter

6. Process Control by Image Analysis
Cake detection is determining the transition from liquid to solid “cake”. It is critical to determine this transition so that cracks in the cake do not form. Cracks will result in inconsistent washes and lost product. Canty performs cake detection by image analysis, detecting the transition and sending an output signal for control to produce homogeneous product. Simultaneously, level measurement and surface roughness can be measured with output signals.

7. Payback
Batch times can be optimized to save and increase production time.
Cake detection prevents cracking to yield a plug free wash resulting in fewer washes being required. With each wash product is lost. Therefore fewer washes result in higher yield. This can result in a 1-5% increase in output. Payback if a plant produces 10 million dollars per year…5% increase is $500,000 pure profit!!!
Level in nutsche can be used to determine the yield of the crystalizer. Level of cake can be measured on the filter wall. The total level at the start of the batch is the batch size. Yield is the total level to the level of the cake.

8. Applications & Industries
Pharmaceutical (Crystallization)
Metallic Powders
Chemical
Most Slurry Applications

9. Concepts of Image Processing
Human Eye
Lighting
Digitizing Image
Image Filters
Image Analysis
Output Signal / Data Storage

10. Equipment
Camera/Light Combination
Spray Ring
Image Processor

11. Flush Mount Camera/Light
Color or Black & White
EXP/FP or Weather Proof
Fused Glass (Standard)
One Connection
Spray Ring Option
Various View Angles
Fiber Optic Lighting
Cold Light NO “Bake-on”
Remote Light Option

12. Insertion Camera/Light
Color or Black & White
EXP/FP or Weather Proof
Fused Glass (Standard)
One Connection
Spray Ring Option
Various View Angles
Fiber Optic Lighting
Cold Light NO “Bake-on”
Remote Light Option

13. Spray Ring Any Fluid or Gas Vortex Cleaning Action
Insertion or Flush Mount
Standard to 2500 PSI
Various Materials
Various Mounting Connections

14. Image Processor CANTYVISION Windows Imbedded Standard OPC
Standard 4-20mA
Excel Interface
Ethernet Connection
Modem (Support)

15. Calibration Cake Detection Level Measure Intensity (Recording Images)
Set Transition Threshold
Set Output Signal
Verify
Level
Fill in Known Increments
Save Images and Record Values
Enter Data in LUT and Interpolate

16. Real Time Measurement Non-Contact One Port Accurate Repeatable
Response Time
Archived Data

17. Output Data / Process Control
Displays
Monitor
Numerical
Output Signals
4-20mA
Spreadsheet
OPC
Process Control

18. Visual Verification Key Advantage R&D
Operators View Process in Real Time
Cross-hairs / Inverted Image
R&D
Recording Files
Images

19. Payback
Batch times can be optimized to save and increase production time.
Cake detection prevents cracking to yield a plug free wash resulting in fewer washes being required. With each wash product is lost. Therefore fewer washes result in higher yield. This can result in a 1-5% increase in output. Payback if a plant produces 10 million dollars per year…5% increase is $500,000 pure profit!!!
Level in nutsche can be used to determine the yield of the crystalizer. Level of cake can be measured on the filter wall. The total level at the start of the batch is the batch size. Yield is the total level to the level of the cake.

20. Conclusion Real Time Measurement Non-Contact Repeatable / Accurate
Visual Verification
Output Signals
Process Control
Better Quality
Higher Yield
Quick Payback

21. Questions & Answers