PERANCANGAN SISTEM OTOMASI PADA AREA AMINE REGENERATOR DI INDUSTRI PEMURNIAN GAS ALAM

AKHMED LAZUARDI, Dr.-Ing. Awang N.I. Wardana

2014 | Skripsi | FISIKA TEKNIK

Area amine regenerator pada pabrik pemurnian gas alam berfungsi untuk memisahkan kandungan air dari larutan amine. Pada industri pemurnian gas alam, proses ini disebut proses regenerasi larutan amine. Proses regenerasi ini menghasilkan larutan amine yang bebas dari kandungan air yaitu lean amine. Setelah bersih dari kandungan air, selanjutnya larutan lean amine tersebut digunakan kembali untuk menyerap kandungan gas asam dari gas alam (sour gas) di menara absorber. Peralatan proses untuk mendukung proses ini pada area amine regenerator terdiri dari menara amine regenerator, amine reboiler, lean boster pump dan solven amine lean/rich exchanger. Semua peralaatan proses ini bekerja membentuk satu kesatuan sistem untuk meregenerasi cairan amine agar dapat digunakan kembali untuk proses absorbsi gas asam dari sour gas di menara absorber. Tujuan dari penelitian ini adalah untuk merancang sistem otomasi di area amine regenerator pada proses pemurnian gas alam. Perancangan ini dimulai dengan analisis Process Flow Diagram (PFD) yang sudah ada sebelumnya, kemudian dilanjutkan merancang Piping & Instrumentation Diagram (P&ID), loop-sheet diagram, Functional Diagram, arsitektur sistem otomasi berbasis DCS (Distributed Control System), instrument specification sheet, Human Machine Interface (HMI), simulasi program (loop test function). Hasil dari perancangan ini adalah rancangan P&ID, loop-sheet diagram, functional diagram yang mengacu kepada dokumen standar ISA S5. 1, arsitektur sistem, instrument specification sheet mengacu kepada dokumen standar ISA S20, rancangan HMI, program simulasi (loop test function).

Area amine regenerator in natural gas purification plant is used to separate water content of the amine solution. In the natural gas purification industry, this process is called a solution of amine regeneration process. This regeneration process produces amine-free solution of a water content that is lean amine. Once clean from the water content, then lean amine solution is used again to absorb the acid gas content of natural gas (sour gas) in the absorber tower. Process equipment to support this process in the area of amine regenerator consisting of amine regenerator tower, amine reboiler, lean amine solvent booster pump and the lean / rich exchanger. All process equipments are working to form an integrated system in order to regenerate the liquid amine that can be reused for acid gas absorption process of sour gas in the absorber tower. The purpose of this study is to design automation systems in the area of amine regenerator in natural gas purification process. The study began with an analysis of Process Flow Diagrams (PFD) that already existed, then proceed to design Piping & Instrumentation Diagrams (P&ID), the loop-sheet diagrams, instrument spesification sheet, Functional diagram, architecture automation system based on DCS (Distributed Control System), Human Machine Interface (HMI), the simulation program (loop test function). The results of this research is the design of P&IDs, loop-sheet diagrams, Functional diagram of the ISA standard document refers to S5.1, system architecture, instrument spesification sheet, HMI design, simulation programs (loop test function).

Kata Kunci : Regenerasi, Amine, Otomasi, Standar ISA.