Prasetyo, Imam Dwi (2020) Study Eksperimental Pengaruh Variasi Setting Pembukaan Classifier Pulverizer Terhadap NPHR Untuk Batubara NK 4961 HGI 49. Masters thesis, Institut Teknologo Sepuluh Nopember.
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Abstract
PLTU Suralaya adalah Pembangkit listrik Tenaga Uap berbahan bakar batubara dengan desain batubara adalah batubara nilai kalori 5387 kCal/kWh HGI 58,71 dengan pengaturan pembukaan sudut classifier 60% dan primary air to coal ratio 1,9:1. Saat ini diperlukan coal switching dalam pemenuhan kebutuhan produksi untuk memperbaiki Biaya Pokok Produksi (BPP) sehingga dipilih batubara nilai kalori (nk) 4961 kCal/kWh HGI 49. Dengan pergantian batubara tersebut tentunya akan terjadi perubahan karakteristik batubara. Perubahan karakteristik batubara sangat berdampak pada perubahan performa mesin pembangkit khususnya pulverizer dan boiler. Perubahan karakteristik yang paling signifikan adalah adanya perubahan terhadap nilai kalor batubara dan Hardgrove Grindability Index (HGI). Dengan adanya perubahan tersebut mempengaruhi coal flow dan ukuran fineness yang lolos 200 mesh. Kedua hal tersebut berpengaruh terhadap parameter operasi pembangkit yaitu terjadi kenaikan pada parameter superheater dan reheater spray flow serta berpengaruh terhadap flue gas temperature. Perubahan terhadap kenaikan parameter superheater dan reheater spray flow serta flue gas temperature tersebut dapat diminimalisir dengan pengaturan terhadap pulverizer vane classifier untuk memperbaiki performa pulverizer dan perbaikan terhadap rasio udara primer dan bahan bakar. Untuk itu, thesis ini menggunakan metode eksperimen. Eksperimen ini dilakukan dengan melakukan pengujian pada variasi primary air fuel ratio dari 1,7: 1, 1,8:1 dan 1,9: 1. Proses pengujian terhadap variasi primary air to coal ratio juga dikombinasikan dengan variasi sudut pembukaan pulverizer classifier vane yaitu pada sudut 40%, 45%, 50%, 55% dan 60%. Pengujian dilakukan pada beban tetap yaitu 600 MW. Hasil pengujian eksperimental ini digunakan untuk menganalisi proses reaksi pembakaran yang terjadi dan pengaruhnya terhadap parameter superheater dan reheater attemperator spray flow serta flue gas temperature sampai dengan perhitungan pengaruh perubahan terhadap heat rate pembangkit dedasarkan EPRI CS 4554.dalam pengujian Thesis ini mendapatkan hasil pengaturan yang sesuai untuk mendapatkan konsumsi superheater attemperator spray, reheater attemperator spray dan flue gas temperature adalah dengan prosentase pembukaan classifier 45% dan primary air to coal ratio 1,7:1 yang berpengaruh terhadap perbaikan heat rate sebesar 31,69 kCal/kWh.
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Suralaya power plant is coal fired steam power plant with coal design is coal calorie value of 5387 kCal / kWh HGI 58.71 with 60% classifier opening and primary air to coal ratio 1.9: 1. Currently needed coal switching to reduce Cost of Production in order to be able to choose coal with a calorific value (nk) 4961 kCal / kWh HGI 49. Changes in coal characteristics greatly affect changes in the performance of pulverizer and boiler. The most significant change in characteristics is the change in the calorific value of coal and the Hardgrove Grindability Index (HGI). With these changes, this affects the flow of coal and the size of fineness that passes 200 mesh. Both of these have an impact on the operating parameters of the plant which occurs an increase in the parameters of the superheater and the reheater spray flow and affect the flue gas temperature. Changes to the increase in the parameters of the superheater and reheater attempertor spray flow and the flue gas temperature can be minimized by resetting the pulverizer vane classifier to improve the performance of the pulverizer and improve the ratio of primary air and fuel (primary air to coal ratio). For this reason, this thesis uses an experimental method. This experiment was carried out by testing the variations in the primary air fuel ratio of 1.7: 1, 1.8: 1 and 1.9: 1. The testing process of the variation of the primary air fuel ratio was also combined with variations in the opening of the pulverizer classifier vane angle of 40%, 45%, 50%, 55% and 60%. The test is carried out at a fixed load of 600 MW. The results of this experimental test are used to analyze the combustion reaction process carried out and its effect on the parameters of the superheater and spray flow reheater and the temperature of the flue gas by calculating changes in the level of heat generated based on EPRI CS 4554. Data result from consumption of superheater attemperator spray, reheater attemperator spray and temperature the flue gas is the percentage of the classifier opening 45% and the primary air to coal ratio is 1.7: 1 which reduce the heat rate plan by 31.69 kCal / kWh.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTM 621.183 Pra s-1 2020 |
| Uncontrolled Keywords: | Primary Air to Coal Ratio, classifier, Hardgrove Grindability Index (HGI), heat rate |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21101-(S2) Master Thesis |
| Depositing User: | IMAM DWI PRASETYO |
| Date Deposited: | 05 Mar 2025 04:27 |
| Last Modified: | 05 Mar 2025 04:27 |
| URI: | http://repository.its.ac.id/id/eprint/75320 |
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