MODEL KONDISI TUNAK DAN DINAMIK UNTUK OPTIMISASI UNIT OPERASI ROTARY CEMENT KILN

Aldina, Serlya (2019) MODEL KONDISI TUNAK DAN DINAMIK UNTUK OPTIMISASI UNIT OPERASI ROTARY CEMENT KILN. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Proses pembentukan klinker yang terjadi pada rotary cement kiln merupakan faktor penting yang memengaruhi kualitas produk semen, sehingga performa dari rotary kiln sangat berpengaruh terhadap keseluruhan proses di dalam industri semen, diantaranya efisiensi energi di unit operasi rotary kiln sangat mempengaruhi total operating cost. Mengingat pentingnya performa dari rotary kiln, diperlukan model yang tepat untuk mensimulasikan karakteristik dari rotary kiln. Pada penelitian ini, akan dikembangkan baik model steady maupun model dinamik yang lebih akurat. Metode penelitian yang digunakan terdiri dari 4 tahap, yaitu permodelan dan pembuatan program komputer dengan menggunakan Matlab, validasi program komputer sesuai dengan data aktual operasi, simulasi steady state dan optimisasi kondisi operasi sesuai variabel yang digunakan (kecepatan putar kiln dan sudut kemiringan kiln) serta simulasi dan Analisa karakteristik dinamik. Dari hasil penelitian didapatkan model simulasi yang cukup akurat dalam memprediksi profil suhu maupun komposisi sepanjang kiln dengan error <6%. Dengan model tersebut didapatkan pengaruh kecepatan putar dan sudut kemiringan terhadap kebutuhan bahan bakar, dimana berdasarkan hasil penelitian baik kecepatan putar maupun sudut kemiringan kiln berbanding terbalik. Berdasarkan hasil tersebut, dapat disimpulkan bahwa kondisi optimum tercapai ketika kiln beroperasi pada kecepatan putar dan sudut kemiringan yang rendah selain itu perubahan step dari kecepatan putar dan sudut kemiringan akan memberikan inverse respon terhadap perubahan burning zone temperature.
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Rotary cement kiln is a main piece of equipment in the cement industry that exhibits complex dynamic behavior, in which any changes can affect the quality of the products produced and the amount of energy consumed. A one-dimensional model of a rotary kiln is required to understand kiln behavior and improve kiln operation and design to achieve optimum product quality and energy consumption. In this study, a one-dimensional mathematical model of a dry rotary cement kiln with pulverized coal combustion was developed. The model consists of a set of nonlinear ordinary differential equations and nonlinear algebraic equations that describe the material and energy balances. The model was solved numerically using MATLAB R2015a and validated by comparing the results with published experimental data. Based on the results, the steady-state simulation showed that the behavior of the developed model was consistent with the results reported in the literature. It can be concluded that the model is sufficiently accurate (error < 6%) to describe the temperature and bed composition profiles along the kiln and can be used to obtain a better understanding of kiln behavior and improve kiln operation and design to achieve optimum conditions. Based on the results, it can also be concluded that the rotational speed and kiln tilt angle significantly influence the amount of energy required. These two parameters have a synergistic effect on energy consumption. In addition, step inputs in the kiln rotational speed and kiln tilt angle produce an inverse response in the burning zone temperature.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Model dinamik, Optimisasi, Rotary Kiln
Subjects:	T Technology > TP Chemical technology
Depositing User:	Aldina Serlya
Date Deposited:	22 Jul 2026 01:14
Last Modified:	22 Jul 2026 01:14
URI:	http://repository.its.ac.id/id/eprint/69175

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