PRACTICAL PROJECT: TOLUENE HYDRODEALKYLATION PROCESS

Figure 1 shows a feedback process control strategy of level of a tank. It has an output variable (controlled variable-level) that needs to be maintained at a desired set-point. The process is subjected to unavoidable disturbance (Feed). One input is available in the process that can be manipulated in order to steer the process to its desired set-point. Hence, in the event of process disturbance drifting the process output away from its desired set-point, the objective of feedback control is to steer the process output at its set-point by manipulating the process input (manipulated variable). Set point ! Feed Controller output LC Tank LT Level measurement Level control valve Figure 1 A Typical Level Control Loop PROJECT ACTIVITIES: 1. Based on ISA coding: Put in the flow diagram the code all the equipment and utilities. (10 marks) 2. Name all the controlled variables (5 marks) 3. Name for each controlled variable, the corresponding manipulated variable (s). (5 marks) 4. Name the main disturbances for each controlled variable. (15 marks) 5. For each controlled variable, draw feedback control strategy (10 marks) 6. Explain clearly your choice for each control loop. (15 marks) 6. Draw in the flow diagram, all the control loops (10 marks) 7. Discussion (15 marks) 8. Conclusion (10 marks) 9. References