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Your search keyword '"Anwar, Farah Syamim"' showing total 2 results
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2 results on '"Anwar, Farah Syamim"'

1. A consideration on transient relief load after activation of high integrity protection system (HIPS) to distillation column.

Author

Hanafi, Hasinah Mohd, Anwar, Farah Syamim, Khairil, Azleen Azna Mohd, Wahid, Nur Jannah Abdul, Hashim, Hasnor Hassaruddin, and Sidek, Sallehuddin

Subjects
*DISTILLATION, *CAPITAL costs, *SUBVERSIVE activities, *DYNAMIC simulation, *ELECTRIC power failures, *CHEMICAL industry
Abstract

In any chemical process industry, the implementation of flare system involves a significant amount of investment in terms of capital cost. There is a significant opportunity to optimize the flare design by applying High-Integrity Protection System (HIPS). HIPS has been widely used as one of mitigation strategies in reducing the flare capacity for new and existing plant as this being allowed by API Std 521. For a new refinery complex, HIPS was introduced in a total of five (5) column reboilers in order to safely reduce the acid gas flare design capacity. Based on preliminary analysis, partial power failure scenario had been identified as the governing scenario for the acid gas flare design capacity. In this use case, HIPS will mitigate any potential overpressure scenario by cutting off the steam supply to the distillation column reboilers. However, it is important to consider the transient relief from the columns to the acid gas flare system considering this may affect the design capacity of the flare. The total transient relief rate estimated from dynamic simulation accounts for the amount of vapor generated due to residual heat from the reboiler after HIPS valves were closed and loss of reflux to the distillation column. The outcome of the model were time-series plots, detailing out the individual and total relieves of all the distillation columns. This paper presents a case study on relief load calculation with HIPS installation and consideration of transient effect for five columns before activation of HIPS together. [ABSTRACT FROM AUTHOR]

Published
2023
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2. Steam System Load Shedding Operational Analysis Using Dynamics Simulation of a Fertilizer Plant

Author

Norman Abdul Rahim, Mohd Khairil Hing Azleen Azna, Md Jaafar M. Azfar, and Anwar Farah Syamim

Subjects
Environmental sciences, GE1-350
Abstract

Steam system operation of a fertilizer plant can be complex due to high number of equipment, unavailable redundancy of steam suppliers and inter-dependency behaviour between steam users. The plant is subjected to partial or total shutdown whenever one boiler trips as both existing boilers are operating close to design capacity. Installation of an additional boiler will provide additional capacity margin in the event of one boiler trips. iCON(Symmetry) was used as the dynamic process simulation tool to establish proper management for load shedding activity with three boilers in operation. Model was developed for the integrated steam header, fuel gas and boiler feed water network. A detailed representation of the actual plant was achieved by incorporating plant hydraulics based on actual piping configurations, high fidelity equipment modelling, process control configurations, trip sequencing and operator manual interventions. This approach gives high accuracy in replicating the plant’s transient behaviour for load shedding case studies. The case studies prove the three boiler arrangement is able to sustain the plant’s continuous operation. An operational strategy was developed to minimize the impact of equipment trips. It is recommended to expand the model to include the process side to represent the actual plant behaviour with higher accuracy.

Published
2021
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