Manajemen dan Strategi Perawatan pada Boiler dengan Teknologi Circulating Fluidized Bed

Marendha, Fidela Atika (2019) Manajemen dan Strategi Perawatan pada Boiler dengan Teknologi Circulating Fluidized Bed. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Boiler dengan teknologi CFB (Circulating Fluidized Bed) memanfaatkan udara bertekanan tinggi untuk menciptakan kondisi fluidisasi terhadap bed material yang terdiri dari pasir, abu bahan bakar, dan sorbent (limestone). Dari data kondisi unit PLTU menunjukkan bahwa beberapa komponen CFB boiler sering mengalami gangguan sehingga dapat mengurangi keandalan mesin. Maka dari itu diperlukan kegiatan perawatan yang sesuai agar perusahaan terhindar dari kerugian yang diakibatkan oleh kegagalan komponen. Pada penelitian ini menggunakan pendekatan keandalan untuk menurunkan tingkat downtime mesin. Data kondisi unit PLTU akan dianalisis untuk memperoleh data komponen kritis boiler. Kemudian detail dan penyebab kegagalan komponen diidentifikasi menggunakan tahap Root Cause Failure Analysis (RCFA). Selanjutnya nilai keandalan komponen dihitung menggunakan perangkat lunak keandalan serta ditentukan kegiatan perancangan perawatan yang tepat pada setiap komponen untuk meningkatkan nilai keandalannya. Berdasarkan analisis data diketahui nilai keandalan kedua unit boiler pada waktu 1000 jam, yaitu 0,86 untuk boiler unit 1 dan 0,74 untuk boiler unit 2. Terdapat 2 jenis komponen kritis dari sistem CFB boiler berdasarkan downtimenya, yaitu tube furnace unit 1, tube furnace unit 2, dan refractory cyclone unit 2. Nilai keandalan pada waktu 1000 jam untuk tube furnace unit 1 adalah 0,86, untuk tube furnace unit 2 adalah 0,94, serta untuk refractory cyclone unit 2 adalah 0,79. Terdapat 4 failure mode yang dapat dicegah dengan preventive maintenance berupa pengontrolan sistem operasional boiler, seperti kualitas dan ukuran batu bara dan predictive maintenance berupa pengontrolan temperatur dan kecepatan udara. Diperoleh interval perawatan untuk tube furnace unit 1 sebesar 2000 jam, untuk tube furnace unit 2 sebesar 5000 jam, dan untuk refractory cyclone sebesar 3000 jam dengan mempertimbangkan nilai keandalan komponen diatas 0,9, mean time between failure, dan rata-rata hidup komponen.
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Boilers with CFB (Circulating Fluidized Bed) technology utilize high-pressure air to create fluidization conditions for bed material consisting of sand, fuel ash, and sorbent (limestone). From the data condition of the PLTU unit, it shows that some components of CFB boilers often experience interference so that they can reduce engine reliability. Therefore, appropriate maintenance activities are needed so that the company avoids losses caused by component failure. In this study using a reliability approach to reduce engine downtime. Data condition of the PLTU unit will be analyzed to obtain critical components of the boiler system. Then the details and causes of component failure are identified using the Root Cause Failure Analysis (RCFA). Furthermore, the value of component reliability is calculated using software reliability and determined the appropriate maintenance design activities in each component to increase the value of reliability. Based on the data analysis, it is known that the reliability of the two boiler units at 1000 hours is 0.86 for boiler units 1 and 0.74 for boiler units 2. There are 2 types of critical components of the boiler CFB system based on the downtimes, namely tube furnace unit 1, tube furnace unit 2, and refractory cyclone unit 2. Reliability at 1000 hours for tube furnace unit 1 is 0.86, for tube furnace unit 2 is 0.94, and for refractory cyclone unit 2 is 0.79. There are 4 failure modes that can be prevented by preventive maintenance in the form of controlling the boiler operating system, such as the quality and size of coal and predictive maintenance in the form of controlling temperature and air velocity. Maintenance intervals for tube furnace unit 1 at 2000 hours, for tube furnaces unit 2 at 5000 hours, and for refractory cyclone at 3000 hours taking into the value of component reliability above 0.9, mean time between failure, and component life average.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Circulating Fluidized Bed Boiler, Keandalan, Perancangan Perawatan.
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ174 Maintenance and repair of machinery T Technology > TJ Mechanical engineering and machinery > TJ263.5 Boilers (general)
Divisions:	Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Fidela Atika M
Date Deposited:	21 Jul 2026 07:38
Last Modified:	21 Jul 2026 07:38
URI:	http://repository.its.ac.id/id/eprint/66385

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