Review Desain Teknologi Mixing Washer Tank Pada Pengolahan Garam Industri

Tjahjono, Endro Wahju (2025) Review Desain Teknologi Mixing Washer Tank Pada Pengolahan Garam Industri. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kualitas produksi garam petani masih rendah perlu ditingkatkan kualitasnya agar memenuhi Standar SNI yang ada. Teknologi pemurnian garam yang umum diterapkan industri besar adalah dengan proses pencucian garam krosok menggunakan larutan garam jenuh (Brine Water). Proses pemurnian garam ini terdiri dari beberapa tahap mulai dari reduksi ukuran garam krosok, pencucian dengan Screw Conveyor lalu Mixing Washer, pencucian lanjut dengan Hydrocyclone diakhiri dengan proses pengeringan.
Dalam penelitian ini dilakukan reverse engineering dengan tujuan dapat diterapkan di industri kecil dan menengah dengan cara melakukan scaledown dari peralatan proses dari industri besar yang berkapasitas 5 ton/jam. Fokus penelitian ini adalah redisain Mixing Washer dengan dimensi dan kapasitas 1 ton/hari sesuai dengan kemampuan UMKM. Penerapan material dalam redesain ini untuk tanki dan baffle dipergunakan HDPE yang cukup kuat dan anti korosi. Untuk sudu dan poros sebagai material utama dipilih bahan SS 316L. Sudu di desain dengan sudut kemiringan sudu 300, 450, 600, lainnya menyesuaikan. Kombinasi proses mixing digunakan variabel putaran sudu/pengaduk 150 rpm, 200 rpm dan 250 rpm. Selain itu dilakukan simulasi dengan sudu kembar dengan variabel yang sama sebagai pengembangan berikutnya.
Berdasarkan hasil Solidworks Flow Simulation maka hasil terbaik pada sudu tunggal dengan sudut 600 dengan putaran 250 rpm karena area pusaran fluida merata mulai dibawah sudu hingga area bahan masuk dan kecepatan fluida diarea fluida masuk sebesar 0.0425 m/s. Untuk penerapan material, bahan sudu tetap sama dengan skala industri yaitu SS 316L karena sifat kerjanya sebagai media penggerak fluida. Material tanki dan baffle bahan HDPE (High Density Polyethylene) Tensile strength = 17.9 Mpa sangat aman karena gaya yang diterima Baffle maksimum = 100.943 Pa = 0,0100953 Mpa. Pengujian Mixer hasil simulasi di laboratorium
menunjukkan hasil kadar NaCl bisa turun 97% dan Mg2+ turun hingga 0,08%.

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improvement to meet the Indonesian National Standard (SNI). In large-scale industries, salt purification typically involves washing coarse salt using a saturated salt solution (brine). This process includes several stages: size reduction of the coarse salt, washing via a screw conveyor, mixing in a washer, further purification using a hydrocyclone, and finally, drying.
This study applies reverse engineering to adapt the industrial process for use in small to medium-sized enterprises (SMEs), by downscaling equipment originally
designed for a capacity of 5 tons/hour. The focus is on redesigning the mixing washer to operate at a capacity of 1 ton/day, aligning with MSME capabilities. For the redesigned equipment, HDPE (High-Density Polyethylene) was selected for the tank and baffles due to its strength and corrosion resistance, while SS 316L stainless steel was used for the blades and shafts, offering durability in fluid mixing
operations. The blades were designed with varying inclination angles of 30°, 45°, and 60°, and the mixing process employed variable stirring speeds of 150 rpm, 200
rpm, and 250 rpm. Further development included simulations with twin-blade configurations using the same variables.
Solidworks Flow Simulation results indicate that the most effective configuration is a single blade with a 600 inclination angle at 250 rpm. This setup produced an
even fluid vortex from beneath the blade up to the material inlet zone, with a fluid velocity of 0.0425 m/s in the inlet area. The chosen blade material, SS 316L, remains consistent with that used in industrial applications due to its effective performance as a mixing component. The HDPE used for the tank and baffles, with a tensile strength of 17.9 MPa, is well within safe limits, as the maximum force
experienced by the baffle was calculated at 100,943 Pa (0.0101 MPa). Laboratory testing of the redesigned mixer, based on the simulation, showed promising results:
NaCl concentration was reduced to 97%, and magnesium (Mg²⁺) content decreased to 0.08%.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Garam, Pencucian, Brine Water, Mixing Washer, NaCl dan Mg2+, CFD
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ230 Machine design
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21101-(S2) Master Thesis
Depositing User:	- Davi Wah
Date Deposited:	31 Jul 2025 02:53
Last Modified:	31 Jul 2025 02:53
URI:	http://repository.its.ac.id/id/eprint/124819

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