Energy and water conservation at lignite-fired power plants using drying and water recovery technologies

Liu, Ming; Qin, Yuanzhi; Yan, Hui; Han, Xinyan; Chong, Daotong

doi:10.1016/j.enconman.2015.07.069

Cited by 37 publications

(8 citation statements)

References 21 publications

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“…Selama pembakaran, air yang ada di dalam batubara mengkonsumsi panas sensible dan panas laten untuk menjadi uap panas. Panas yang terserap uap panas ini ikut terbuang bersama dengan gas buang (Liu et al, 2015). Jumlah panas yang diambil oleh uap air berbanding lurus dengan jumlah air yang ada dalam batubara.…”

Section: Gambar 1 Hubungan Antara Kadar Air Dan Nilai Kalor Batubaraunclassified

Studi Kasus Proyek Co-Benefit Peningkatan Efisiensi Boiler Batubara di Industri Kertas

et al. 2020

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Pertumbuhan industri yang pesat menyebabkan masalah emisi gas rumah kaca. Kegiatan co-benefit peningkatan efisiensi boiler batubara telah dilakukan di industri kertas dalam proyek “Co-benefit Indonesia Tahun 2018” dari Kementerian Lingkungan Hidup Jepang dengan tujuan melakukan identifikasi langkah-langkah yang terkait dengan konservasi energi dan penurunan polutan emisi boiler industri berbahan bakar batubara dan cara melakukannya. Identifikasi meliputi analisis efisiensi termal boiler, pengukuran kadar air batubara, pengukuran kualitas air umpan boiler, air blowdown, dan kondensat, pemeriksaan insulasi panas, pengaturan rasio udara pembakaran, dan pengendalian operasi multi boiler. Berbagai kehilangan panas dianalisis dan beberapa rekomendasi diberikan untuk implementasi di pabrik sehingga efisiensi boiler dapat ditingkatkan. Beberapa masalah yang perlu diperbaiki untuk konservasi energi meliputi penggunaan batubara dengan kadar air tinggi, rasio udara pembakaran tinggi, konduktivitas air umpan tinggi menyebabkan rasio blowdown tinggi, tidak dilakukan insulasi pada mesin produksi yang relatif tua, dan pengoperasian beberapa boiler dengan efisiensi rendah. Potensi perbaikan melalui penyesuaian kadar air batubara, perbaikan rasio udara pembakaran, optimalisasi rasio blowdown, pemulihan air kondensat, pemasangan insulasi, dan kontrol multi boiler secara teori menghasilkan reduksi konsumsi batubara 16.445 ton/tahun atau 48,63%, dan reduksi CO2 sebesar 19.589 tCO2/tahun dengan estimasi penghematan biaya Rp 12 milyar/tahun. Kata kunci: co-benefit, industri kertas, boiler, batubara, emisi.Case Study of Co-Benefit Project Improvement of Coal Boiler Efficiency in The Paper IndustryABSTRACT Industrial rapid growth has caused greenhouse gas emissions problems. Co-benefit activities to improve the efficiency of coal boilers have been carried out in paper industry in the project of “Co-benefit Indonesia FY 2018” from the Japan Ministry of Environment aimed at identifying required steps to save energy and reduction of pollutant emission from the coal-fired industrial boilers and how to achieve it. Identification include analysis of boiler thermal efficiency, coal moisture content measurement, boiler feed water, blowdown water and condensate quality measurement, heat insulation examination, combustion air ratio management, and control of multiple boiler operations. Various heat losses have been analyzed and some recommendations have been proposed to be implemented by factory management to improve boiler efficiency. There are several issues that need to be addressed for energy conservation, namely: high water content coal utilization, high combustion air ratio, high conductivity feed water which causes high blowdown ratios, no insulation on relatively old production machines, and operational of several low efficiency boilers. The results of the co-benefit identification indicated that the potential for corrective action by adjusting the coal water content, improving the combustion air ratio, optimizing the blowdown ratio, recovering condensate water, installing insulation, and controlling multiple boilers theoretically can result coal consumption reduction of 16,445 tons/year or 48.63%, and CO2 reduction of 19,589 tCO2/year with an estimated cost savings of Rp 12 billion/year.

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Section: Gambar 1 Hubungan Antara Kadar Air Dan Nilai Kalor Batubaraunclassified

Studi Kasus Proyek Co-Benefit Peningkatan Efisiensi Boiler Batubara di Industri Kertas

et al. 2020

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“…Lignite has very different properties depending on a number of factors, especially depending on its origin site. Lignite accounts for approximately 40% of the total coal reserves worldwide [2] and is considered a competitive raw material energy with a high security of supply [3]. However, power plants that dirrectly fire lignite have low efficiency compared to coal-fired power plants [4], which can be improved by pre-drying, i.e., to dry the fuel before it is introduced into the combustion process [5].…”

Section: Introductionmentioning

confidence: 99%

Thermokinetics of Brown Coal during a Fluidized Drying Process

Plutecki

Sattler²,

Ryszczyk

et al. 2020

Energies

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This paper presents the results of research describing the thermokinetics of brown coal’s (lignite) drying process in a fountain-bubble fluidized bed dryer. The drying medium was atmospheric air of a variable temperature in subsequent tests, which ranged from 27 to 70 °C. This paper presents the results of many experimental studies for two different types of brown coal: xylite, from the Bełchatów mine, and earth, from the Turów mine. The two types of brown coal are used to assess different sized coal particles and different air drying temperatures. The functions parameterizing the moisture content of dried coal at different air drying temperatures at any given time are also presented.

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“…The integration of pre-drying and water recovery technologies within lignite-fired power plants were analyzed with the attention to its influence on the energy and water conservation. Results showed that these technologies have the potential to overcome the shortcomings of conventional lignite-fired power plants and make lignite-fired power plants more environmentally friendly [13].…”

Section: Introductionmentioning

confidence: 99%

Determining of Drying Characteristics for South Sumatera Low Rank Coal using Solar and Laboratory Scaled Oven

Bizzy¹,

Sipahutar²,

Ibrahim³

et al. 2017

International Journal on Advanced Science, Engineering and Information Technology

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South Sumatera is one of the provinces in Indonesia that has the largest coal reserve in Indonesia. Unfortunately, the type of coal is mostly in the low-rank coal. Through a national energy policy, the government of the Republic of Indonesia has set an increased consumption of coal for domestic use. The energy derived from coal will be increased approximately 33 percent of the total Indonesia energy consumption in 2025. Currently, approximately 70 percent of Indonesia's coal production is used by the State Electricity Company as fuel for power generation, 10 percent for the manufacturer of cement, and the rest for industrial and metallurgical processes. The low-rank coal, which contents a high moisture into solution be decreased firstly and then through drying process before using in industry. In the power generation industry, usually, low-rank coal is dried naturally in a closed stockpile before being used as fuel, and spontaneous ignition happens frequently. The results show a decrease in moisture content for solar drying and using laboratory scale oven. Solar drying depends on the solar radiation falling onto the surface, so coal drying depends on highly weather and time.

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Energy and water conservation at lignite-fired power plants using drying and water recovery technologies

Cited by 37 publications

References 21 publications

Studi Kasus Proyek Co-Benefit Peningkatan Efisiensi Boiler Batubara di Industri Kertas

Studi Kasus Proyek Co-Benefit Peningkatan Efisiensi Boiler Batubara di Industri Kertas

Thermokinetics of Brown Coal during a Fluidized Drying Process

Determining of Drying Characteristics for South Sumatera Low Rank Coal using Solar and Laboratory Scaled Oven

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