Centrifuge School Agenda


	Centrifuge School Agenda (Revised for 2006) There is a similar agenda for Thickening sludges with centrifuges. The content can be changed to suit particular requirements. Classroom Session 1, 1.75 hours 7:45 - 8:00 AM: Introduction, Greeting Times to be Adjusted to Suit Plant Convenience 8:00 AM: Centrifuge fundamentals Nomenclature Basic function Analogy to screw conveyor Torque Differential RPM Pond setting Analogy to a Clarifier/thickener 8:45 AM: What goes on inside. Residence time Cake level profile for moderate dryness Cake level profile for dry cake Hydraulic lift, analogy to a rising tube valve Interaction of negative pond and differential rpm Optimization, putting it all together 9:15 AM: Water and the Sludge Particle How water is held in the sludge particle Free water Bound water Capillary water Surface water What it really means, predictions for sludge dewater ability Ratio of primary to secondary sludge Alum and Ferric dosage Septic sludge Control in the wet end of the plant 9:45 AM: Snack Break 15 min Session 2, 1.75 hours 10:00 AM: Calculations for Operators % capture G force Differential rpm 10:15 AM: Introduction to Polymer Technology Types of polymer Polymer Jar Tests, necessary calculations Choosing polymers for centrifuges Polymer Jar Test Demo 10:45 AM: Applying polymers to the centrifuge The make up system, common problems Basic calculation for the makeup system Jar Testing to diagnose problems, basic ratios Polymer concentration and addition point. 11:30 AM: Trouble shooting the Polymer System Common design flaws 11:45 AM: Lunch Break 30 min 12:30 PM: Session 3, 1.5 hours 12:30 PM: Polymer Trials & Polymer Bidding How to get what you pay for Keep reference samples Obtain bids on all polymers tested Who should bid? 12:45 PM: The Old Way Importance of confidentiality Responsibility Organizing and controlling the vendor trials Record keeping Formal sampling and testing procedures 1:00 PM: The new way, Bidding polymers as a commodity Removing luck from selection Organize the jar testing Plant trials without vendors 1:15 PM: Buying Month To Month on the Spot Market How to Do it Product evaluation 1:25 PM: Operator duties The importance of a log book and record keeping Analytical testing in the dewatering building Flushing and cleaning the centrifuge Inspection of the centrifuge Making the operator's life easier Maintenance for operators Daily operator checks to detect trouble 1:35 PM: What will happen if? The centrifuge shuts down without lubrication oil The cake backs up in the chute The centrate backs up in the chute The venting system fails Venting, drips and leaks Vibration levels Common causes of high vibration 1:45 PM: Break, 15 min 2:00 PM: Annual centrifuge Olympics, Step by Step Optimization Management's job review economics Polymer vendor's job Making a list and checking it twice Poly Addition Point Pond setting Bowl Speed Push the centrifuge, develop an Operating Curve De-bottleneck 2:30 PM: Simple tools for Maintenance Inspection tool Motor Alignment Dam changing tool Motor jack Bowl Drain Saving Time on Greasing 3:00 PM: Repair Options Bid your Centrifuge repairs Require reports and pictures When can you use generic parts with confidence. 3:30 PM: End of school. Instructor will stay to answer questions, and provide one on one discussion 4:15 PM: End of school if there was a trip to the maintenance shop to inspect a centrifuge Time, 7:45 - 3:30, 6.30 hours of instruction, with 1.25 hours for breaks
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