1. PROCESS CONTROL DESIGN CRITERIA DESIGNS FOR SPECIFIC SERVICES

2. DISTILLATION CONTROL PRESSURE CONTROL COLUMNS ARE OPERATED AT CONSTANT PRESSURE PRESSURE CONTROL CAN BE UTILIZE VACUUM CONTROL FOR SUBAMBIENT OPERATION, WITH CONDENSATE TEMPERATURE CONTROL TO ASSURE TOTAL CONDENSATION CONDENSER CONTROL FOR PRESSURIZED COLUMNS, WITH PURGE TO ELIMINATE ACCUMULATION OF NON-CONDENSIBLE COMPONENTS http://coweb.cc.gatech.edu/process/uploads/distillationcolumn.gif

3. TYPICAL ARRANGEMENT FOR DISTILLATION PRESSURE CONTROL FOR SUB- AMBIENT SYSTEM COLUMN DISTILLATE RECEIVER CONDENSER TC OVERPRESSURE PURGE VALVE SUB-AMBIENT DISTILLATION SYSTEM VACUUM SYSTEM PC

4. TYPICAL ARRANGEMENT FOR DISTILLATION PRESSURE CONTROL FOR ABOVE AMBIENT SYSTEM COLUMN DISTILLATE RECEIVER CONDENSER OVERPRESSURE PURGE VALVE AMBIENT OR SUPER –AMBIENT DISTILLATION SYSTEM PC

5. REFLUX CONTROL USE LEVEL CONTROL ON DISTILLATE RECEIVER TO CONTROL DISTILLATE RATE USE FLOW-FLOW RATIO CONTROL TO CONTROL REFLUX RATE NOTE THAT THIS REFLUX RATIO SETPOINT CAN BE ADJUSTED USING AN ANALYZER SENSOR USE TEMPERATURE CONTROL FOR CONDENSER WATER FLOW

6. BOILUP CONTROL COLUMN REBOILER BOTTOMS LC TC STEAM BOIL-UP CONTROL FOR DISTILLATION SYSTEM

7. BOILUP CONTROL THE SUMP LEVEL CONTROL SERVES TO SET THE BOTTOMS FLOW RATE THE VAPORIZATION RATE CAN BE CONTROLLED USING THE LOWER TRAY TEMPERATURE OTHER OPTIONS ARE AVAILABLE www.aspentech.com/publication_files/An_Integrated_App roach_for_Distillation_Column_Control.pdf

8. REACTOR CONTROL HEAT EXCHANGER HEATING OR COOLING MEDIA REACTOR CIRCULATION PUMP TC

9. REACTOR CONTROL CSTR FOR EXOTHERMIC OR ENDOTHERMIC REACTIONS, LOCATE THE HEAT TRANSFER UNIT OUTSIDE THE REACTOR AND USE A JACKET OR AN INTERNAL COIL PFR CONTROLLED LIKE A HEAT EXCHANGER

10. PUMP FLOW CONTROLS PUMPS SHOULD INCLUDE A SWITCH TO ACTIVATE/SWITCH THE SPARE UNIT A B S FS LL I

11. TANK RELIEF DESIGNS TANKS SHOULD BE ALARMED FOR LEVEL AND/OR PRESSURE AND/OR TEMPERATURE PRESSURE RELIEF SHOULD BE PROVIDED FOR TANKS CONTAINING HAZARDOUS MATERIALS LS HH I PS LL TO FLARE RDHHI INERT GAS

12. USE PLCs FOR BATCH OPERATIONS USE RECIPE FROM SUPERPRO Cl2 RXTR PLC

13. BATCH CONTROL DESIGN METHODS – ISA S88 ISA S88 was developed to provide a structure for design of Batch Control systems. S88 defines hierarchical recipe management and process segmentation frameworks, which separate products from the processes that make them. The standard enables reuse and flexibility of equipment, and provides a structure for coordinating and integrating recipe-related information across the traditional ERP, MES, and control domains. (http://www.batchcontrol.com/s88/01_tutorial/03- whatiss88.shtml)http://www.batchcontrol.com/s88/01_tutorial/03- whatiss88.shtml

14. S88 - DEFINITIONS Separate the recipe from equipment control (http://www.batchcontrol.com/s88/01_tutorial/03- whatiss88.shtml)

15. S88 - DEFINITIONS Everything breaks into pieces (http://www.batchcontrol.com/s88/01_tutorial/03- whatiss88.shtml)

16. RECIPE DEFINITIONS Recipes are provided for different levels (http://www.batchcontrol.com/s88/01_tutorial/03- whatiss88.shtml)

17. RECIPE EXAMPLE Recipe for making ice cream (http://www.batchcontrol.com/s88/01_tutorial/03- whatiss88.shtml)

18. RECIPE EXAMPLE Ice cream Recipe (http://www.batchcontrol.com/s88/01_tutorial/03- whatiss88.shtml)