Basyasyah, Adzrofil Tsabitah (2025) Laporan Magang Mandiri 1 September 2025-1 Desember 2025 di PT. Petrokimia Gresik. Project Report. [s.n.]. (Unpublished)
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Abstract
Unit NPK Granulasi I PT Petrokimia Gresik memiliki permasalahan berupa tingginya kandungan partikulat pada gas buang rotary dryer yang menyebabkan terjadinya penumpukan debu (scaling) pada blower di scrubbing room. Kondisi tersebut dapat menurunkan kinerja peralatan, meningkatkan frekuensi pemeliharaan, serta mengurangi efektivitas pengendalian emisi partikulat. Oleh karena itu, dilakukan analisis terhadap permasalahan yang terjadi serta penyusunan usulan perbaikan melalui penambahan cyclone separator sebelum aliran gas memasuki scrubbing room. Perancangan cyclone dilakukan berdasarkan laju alir gas dan distribusi ukuran partikel pada gas buang rotary dryer. Hasil perhitungan menunjukkan bahwa penggunaan dua unit cyclone yang dipasang secara paralel mampu mencapai efisiensi pemisahan partikulat sebesar 91,42%, sehingga jumlah partikulat yang masuk ke scrubbing room dapat dikurangi secara signifikan. Selain itu, dimensi cyclone yang diperoleh sesuai untuk diterapkan pada sistem yang telah ada tanpa mengubah rangkaian proses utama. Usulan penambahan cyclone diharapkan dapat mengurangi pembentukan scaling pada blower, meningkatkan keandalan operasi, memperpanjang umur peralatan, serta meningkatkan kinerja sistem pengendalian emisi partikulat pada Unit NPK Granulasi I PT Petrokimia Gresik.
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NPK Granulation Unit I at PT Petrokimia Gresik experiences a problem related to the high concentration of particulate matter in the rotary dryer exhaust gas, which causes dust accumulation (scaling) on the blower in the scrubbing room. This condition can reduce equipment performance, increase maintenance frequency, and decrease the effectiveness of the particulate emission control system. Therefore, an analysis was conducted to identify the cause of the problem and to develop a proposed solution by installing a cyclone separator before the gas stream enters the scrubbing room. The cyclone was designed based on the exhaust gas flow rate and the particle size distribution of the rotary dryer exhaust gas. The calculation results showed that the use of two cyclone units installed in parallel could achieve a particulate separation efficiency of 91.42%, thereby significantly reducing the amount of particulate matter entering the scrubbing room. Furthermore, the proposed cyclone dimensions are suitable for implementation in the existing system without requiring modifications to the main process flow. The proposed cyclone installation is expected to reduce scaling on the blower, improve operational reliability, extend equipment service life, and enhance the performance of the particulate emission control system in NPK Granulation Unit I at PT Petrokimia Gresik.
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