Laporan Magang Mandiri PT Petrokimia Gresik

Mahendra, Mohchammad Ardel Laporan Magang Mandiri PT Petrokimia Gresik. Project Report. [s.n]. (Unpublished)

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Abstract

Program magang dilaksanakan di PT Petrokimia Gresik, khususnya Departemen Produksi II B, sebagai sarana penerapan ilmu Teknik Kimia Industri pada proses produksi pupuk skala industri. Kegiatan magang meliputi pengamatan proses produksi NPK Granulasi, Phonska IV, dan ZK, pemahaman Process Block Diagram, Process Flow Diagram, serta Piping and Instrumentation Diagram, identifikasi HAZOP, dan penyusunan neraca massa maupun neraca energi. Tugas khusus difokuskan pada evaluasi kinerja sistem pengendalian debu di Unit NPK Granulasi akibat tingginya paparan debu dan meningkatnya beban scrubber. Penyelesaian masalah dilakukan melalui observasi lapangan, wawancara dengan personel operasi, studi literatur, perhitungan empiris, serta simulasi Computational Fluid Dynamics menggunakan ANSYS Fluent. Hasil analisis menunjukkan bahwa kinerja cyclone pada kondisi aktual belum optimal karena distribusi kecepatan aliran tidak merata dan gaya sentrifugal belum bekerja secara konsisten, sehingga partikel halus masih terbawa menuju outlet. Efisiensi cyclone berdasarkan perhitungan empiris pada kondisi awal sebesar 72,39%, sedangkan simulasi CFD menghasilkan efisiensi sebesar 76,5%. Penambahan duct reducer direkomendasikan untuk memperkecil luas penampang inlet dan meningkatkan kecepatan aliran dari 8,5 menjadi 15,5 m/s. Pada skenario tersebut, efisiensi empiris meningkat menjadi 79,36%, sedangkan simulasi menunjukkan 25.889 partikel terperangkap dan hanya 594 partikel lolos. Dengan demikian, duct reducer berpotensi menjadi solusi teknis yang sederhana dan aplikatif untuk meningkatkan kinerja pemisahan cyclone tanpa mengubah desain utama alat.
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The internship program was conducted at PT Petrokimia Gresik, specifically in the Production Department II B, as an opportunity to apply Industrial Chemical Engineering knowledge to large-scale fertilizer production processes. The internship activities included observing the production processes of NPK Granulation, Phonska IV, and ZK; studying the Process Block Diagram, Process Flow Diagram, and Piping and Instrumentation Diagram; conducting HAZOP identification; and preparing mass and energy balances. The specific assignment focused on evaluating the performance of the dust-control system in the NPK Granulation Unit due to high dust exposure and the increasing load on the scrubber. The problem was investigated through field observations, interviews with operational personnel, literature studies, empirical calculations, and Computational Fluid Dynamics simulations using ANSYS Fluent. The results indicated that the cyclone performance under actual operating conditions was not optimal because of uneven airflow velocity distribution and inconsistent centrifugal forces, causing fine particles to be carried toward the outlet. The cyclone efficiency under the initial condition was 72.39% based on empirical calculations and 76.5% based on CFD simulations. The installation of a duct reducer was recommended to reduce the inlet cross-sectional area and increase the airflow velocity from 8.5 to 15.5 m/s. Under this condition, the empirical efficiency increased to 79.36%, while the simulation showed that 25,889 particles were trapped and only 594 particles escaped. Therefore, the duct reducer offers a simple and applicable technical solution for improving cyclone separation performance without modifying the main equipment design.

Item Type:	Monograph (Project Report)
Uncontrolled Keywords:	ANSYS Fluent, cyclone, duct reducer, NPK granulasi, pengendalian debu. ANSYS Fluent, cyclone, duct reducer, dust control, NPK granulation.
Subjects:	Q Science > Q Science (General) > Q180.55.M38 Mathematical models Q Science > QC Physics > QC151 Fluid dynamics Q Science > QD Chemistry > QD251.2 Chemistry, Organic. Biochemistry Q Science > QD Chemistry > QD471 Chemical compounds - Structure and formulas Q Science > QD Chemistry > QD547 Flocculation, precipitation, adsorption, etc.
Divisions:	Faculty of Vocational > 24305-Industrial Chemical Engineering
Depositing User:	Mohchammad Ardel Mahendra
Date Deposited:	24 Jul 2026 07:33
Last Modified:	24 Jul 2026 07:33
URI:	http://repository.its.ac.id/id/eprint/136692

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