Table of Contents
Unit 1: Introduction and Overview
Course Coverage
Purpose
Audience and Prerequisites
Study Materials
Organization and Sequence
Course Objectives
Course Length
Unit 2: Distillation Control Variables
Distillation Column Inlet Streams
Distillation System Outlet Streams
Controlled Variables
Unit 3: Separation Power
Relative Volatility in One Theoretical Stage
Separation Power with Multiple Stages
Separation Power and Energy Consumption
Unit 4: Distillate/Feed Material Balance Split
Material Balances
Temperature Gradient per Theoretical Stage
Temperature Change from D/F Shift
Unit 5: Distillation Control Strategies
Column Pressure Control
Temperature Control with Distillate Flow Rate
Temperature Control with Reflux Flow Rate
Temperature Control with Boilup(Steam Rate)
Temperature Control with Bottoms Flow Rate
Side Draw Flow Rate
Distillate Vapor Flow Rate
Unit 6: Constraints
Mechanical and Hydraulic Constraints
Heat Transfer Constraints
Stripping Mass Transfer Constraint
Rectification (Absorption) Mass Transfer Constraint
Unit 7: Optimizing Product Quality Performance
Quality Performance Measurement
Frequency of Failure
Optimize MRT Between Distillate and Bottoms Quality
Avoid Excessive Use of Steam
Reduce Variability
Optimize with Expert System Advisor
Unit 8: PID Feedback Control Loop
The Feedback Control Loop
Proportional
Integral
Derivative
Parallel and Series Algorithms
Unit 9: Closed Loop Tuning of Controllers
Trial and Error Tuning of Control Loops
Ultimate Gain Tuning of Control Loops
Troubleshooting an Oscillating Control Loop
Quarter Decay Ratio tuning of Control Loops
Pattern Recognition Tuning of Self Regulating Control Loops
Effect of Proportional Gain
Effect of Integral (Reset) Action
Pattern Recognition Tuning of Integrating Control Loops
Unit 10: Open Loop Testing of Process Response
Self Regulating Process Response
Ziegler-Nichols (Z-N) Open Loop Tuning Rules
Two Point Characterization of FOPDT Process Response
Quarter Decay Ratio (QDR) Tuning Rules
Internal Model Control (IMC) Tuning Rules
Integrating Process Response