Optimasi Panas Buang Cooler Untuk Waste Heat Recovery Power Generation System Pada Pabrik Semen

Pertiwi, Shinta Dewi Surya and Puspitasari, Yuliana Dewi (2022) Optimasi Panas Buang Cooler Untuk Waste Heat Recovery Power Generation System Pada Pabrik Semen. Other thesis, Institut Teknologi Sepuluh Nopember Surabaya.

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Abstract

Saat ini pemerintah sedang gencar-gencarnya melakukan pembangunan infrakstruktur. Tentunya kebutuhan akan material penunjang pembangunan terus meningkat, salah satunya yaitu semen portland cement. Material semen merupakan material penting yang hingga saat ini belum ada penggantinya. Untuk itu, kebutuhan akan semen setiap tahunnya akan terus meningkat setiap tahunnya. Proses pembuatan semen yang dipilih yaitu proses kering dikarenakan lebih ekonomis dibandingkan proses lainnya. Proses pembuatan semen diawali dengan persiapan bahan baku yaitu batu kapur dan tanah liat. Bahan baku tersebut dilakukan pengecilan ukuran menggunakan crusher dan clay cutter. Setelah itu, campuran material batu kapur dan tanah liat dicampur dengan pasir silika, pasir besi dan diumpankan pada raw mill. Produk dari raw mill akan dialirkan ke preheater, lalu diumpankan ke dalam kiln dengan suhu masuk 800℃. Di dalam kiln akan mengalami proses pembakaran dengan suhu 1250-1450 ℃, yang kemudian akan menghasilkan senyawa clinker. Selanjutnya dilakukan pendinginan di dalam clinker cooler. Dalam proses penggilingan akhir dilakukan penambahan bahan tambahan yaitu gypsum dan trass yang akan dilakukan penggilingan ke dalam ball mill menjadi semen yang berukuran 325 mesh. Pabrik semen beroperasi secara continuous selama 330 hari/tahun memiliki kapasitas 3.100.000 ton/tahun. Optimasi yang dilakukan dengan memanfaatkan panas buang dari cooler yang masih bersuhu ± 320℃ dengan melakukan penambahan alat untuk keperluan Waste Heat Recovery Power Generation dengan total biaya pembelian peralatan sebesar Rp 18.725.408.448,89. Listrik yang dihasilkan oleh Waste Heat Recovery Power Generation mampu menghemat sebesar 50,90% dari kebutuhan listrik keseluruhan dan mampu menghemat biaya sebesar Rp 1.146.320.555 tiap bulan. Setelah dilakukan optimasi didapatkan niali IRR sebesar 12,56%, POT 3,60 tahun, dan BEP 46,26%
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Currently, the government is incessantly carrying out infrastructure development. Of course, the need for construction supporting materials continues to increase, one of which is portland cement. Cement material is an important material which until now there is no substitute. For this reason, the need for cement every year will continue to increase every year. The cement manufacturing process chosen is the dry process because it is more economical than other processes. The process of making cement begins with the preparation of raw materials, limestone and clay. The raw material is reduced in size using a crusher and clay cutter. After that, the mixture of limestone and clay materials is mixed with silica sand, iron sand and fed to the raw mill. The product from the raw mill will be flowed into the preheater, then fed into the kiln with an inlet temperature of 800℃. In the kiln it will undergo a combustion process with a temperature of 1250-1450, which will then produce clinker compounds. Furthermore, cooling is carried out in the clinker cooler. In the final milling process, additional materials are added, namely gypsum and trass which will be milled into a ball mill into cement with a size of 325 mesh. The cement plant operates continuously for 330 days/year with a capacity of 3.100.000 tons/year. Optimization is carried out by utilizing the waste heat from the cooler which is still at a temperature of ± 320℃ by adding additional tools for the purposes of Waste Heat Recovery Power Generation with a total equipment purchase cost of Rp 18.725.408.448. The electricity generated by Waste Heat Recovery Power Generation is able to save 50,90% of the total electricity demand and can save costs of Rp 1.146.320.555 per month. After optimization, the IRR value was 12,56%, POT was 3,60 years, and BEP was 46,26%

Item Type:	Thesis (Other)
Additional Information:	RSKI 666.94 Per o-1
Uncontrolled Keywords:	Semen PPC, Grate Cooler, WHRPG
Subjects:	T Technology > TP Chemical technology > TP883 Portland cement.
Divisions:	Faculty of Vocational > 24305-Industrial Chemical Engineering
Depositing User:	EKO BUDI RAHARJO
Date Deposited:	09 Dec 2022 03:49
Last Modified:	09 Dec 2022 03:49
URI:	http://repository.its.ac.id/id/eprint/95197

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