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Gas heater is a main part of direct reduction plant of PT. XYZ which has function to increase process gas temperature (CO and H2) to become 930 degrees C. Natural gas and tail gas is used as a main fuel in gas heater system. Then, process gas used for pellet reduction. Because of that, a control sys...
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| Main Author: | |
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/11468 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Gas heater is a main part of direct reduction plant of PT. XYZ which has function to increase process gas temperature (CO and H2) to become 930 degrees C. Natural gas and tail gas is used as a main fuel in gas heater system. Then, process gas used for pellet reduction. Because of that, a control system is needed in order to make the controlled system with a good response, to have a good disturbance rejection, and to track reference trajectory or the set point.<p> <br />
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Advanced Process Control (APC) is a technique to bring system to the controlled system to the optimal condition. In this final project, AIDA software is used to perform the modeling based on identification method and SMOC software is used to design predictive controller.<p> <br />
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Based on identification method, the model of gas heater system is a summing of first order plus dead time models. Simulation results using predictive control simulation show that the controlled system produce a settling time of 15 minutes after a change in the set point occurs. Besides of achieveng better response, consumption of natural gas can also be optimized so that it can be saved as big as 3084 NCMH or equivalent to US$ 888.74 during 150 minutes process running. |
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