Nutsche Filter Control

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

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

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.

Typical Nutsche Filter

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.

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.

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

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

Equipment Camera/Light Combination Spray Ring Image Processor

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

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

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

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

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

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

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

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

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.

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

Questions & Answers