Investigation on Slagging Fouling Potential in Coal Blending for …

 · The majority of power plants in Indonesia are Coal-Fired Power Plants (PLTU) which using coal as the main fuel. The coal used in the PLTU is coal that has been adjusted to the existing PLTU design. However, coal availability according to the initial design of the PLTU is running low and even almost non-existent. If the coal does not meet the PLTU design …

COAL CHARACTERISTICS

CCTR Indiana Center for Coal Technology Research 3 COAL ANALYSIS Elemental analysis of coal gives empirical formulas such as: C 137 H 97 O 9 NS for Bituminous Coal C 240 H 90 O 4 NS for high-grade Anthracite Coal is divided into 4 ranks: (1

Ash chemistry and mineralogy of an Indonesian coal during …

 · This paper reports on combustion experiments carried out in a pilot scale furnace as a follow-up to research previously carried out using a drop-tube furnace to investigate the combustion behaviour of an Indonesian coal, in particular the effects of additives on ash ...

Modern Boiler Designs for Firing Indian and Southeast Asian Coals …

coals" (e.g., Powder River Basin, Dakota lignite, Indian, Indonesian, etc.) in boilers is different from the behavior predicted using the "standard" methods shown above. These have resulted in the development of new methods to better predict their performance

Ash Deposition Behavior of Upgraded Brown Coal and Bituminous Coal …

 · Ash with a low melting point causes slagging and fouling problems in pulverized coal combustion boilers. Ash deposition on the heat exchanger tubes reduces the overall heat transfer coefficient due to its low thermal conductivity. The ash composition in coal and operational conditions in boilers such as heat load greatly affect the ash deposition behavior. This study …

(PDF) Study of coal ash deposition in an entrained flow reactor: Influence of coal …

An entrained flow reactor has been used to characterize the slagging behaviour of twelve coals/blends, under different experimental conditions. Besides measuring the weight of the deposits, a detailed characterization of the coals, fly ashes and

Energies | Free Full-Text | Slag Behavior in Gasifiers. Part I: Influence of Coal …

 · In addition, indices (slagging and fouling) based on ash compositions could be used to guide operations and evaluate coal quality for gasification or to describe ash slagging or fouling behavior. There are many proposed indices, but most of them have limited application because they are not based on physical principles.

The chemical composition of tertiary Indian coal ash and its combustion behaviour – a statistical approach…

 · Based on the slagging and fouling ranges, it is found that the Meghalaya coals have medium slagging potential whereas these coals exhibit low fouling potentials. The study of correlation, HCA and PCA analyses among the ashes, calorific value, and predictive indices revealed that the slagging behaviour of the Meghalaya coals is found to correlate with the …

Lowering ash slagging and fouling tendency of high-alkali coal by …

 · High-alkali species in coal are notorious for causing ash slagging and fouling incidents. In this paper, four high-alkali coals were individually subject to hydrothermal pretreatment (HTP), within a batch-type autoclave at 300 C for 1 h, and the treated coals were analyzed, along with the oxygen-containing functional groups determined by Fourier transform …

A critical review of ash slagging mechanisms and viscosity measurement for low-rank coal …

A critical review of ash slagging mechanisms and viscosity measurement for low-rank coal and bio-slags Md Tanvir ALAM 1, Baiqian DAI 1, Xiaojiang WU 2, Andrew HOADLEY 1, Lian ZHANG 1 1 partment of Chemical Engineering, Monash University, Clayton ...

slagging behavior of indonesian coals

 · Numerical assessment of coals/blends slagging potential in Dec 01, 2012Dec 01, 2012The deposition rates for Indonesian sub-bituminous (coal 8), and the Colombian (coal 9) and South African (coal 10) bituminous coals, operated under the same conditions, have ...

Experimental Investigation of Ash Deposit Behavior during Co-Combustion of Bituminous Coal …

energies Article Experimental Investigation of Ash Deposit Behavior during Co-Combustion of Bituminous Coal with Wood Pellets and Empty Fruit Bunches Tae-Yong Jeong 1, Lkhagvadorj Sh 1, Jong-Ho Kim 1, Byoung-Hwa Lee 2 and Chung-Hwan Jeon 1,3,* 1 School of Mechanical Engineering, Pusan National University, 2, Busandaehak-ro 63 beon-gil, ...

Analysis of Coal Ash

Title Analysis of Coal Ash Subject SGS provides a complete range of laboratory testing for coal ash. Our state-of-the-art labs can provide accurate data for ash fusion, viscosity, chemistry, resistivity and petrography. Created Date 10/28/2013 2:58:41 PM

(PDF) Investigation on Coal Slagging Characteristics and …

Slagging in the furnace poses problem to coal power s tation at it reduce the efficiency of heat transfer. to water in water tubes. The right viscosity of coal at high temperature has to be in the ...

ASH DEPOSIT CHARACTERISTICS OF BLENDED COAL IN COAL COMBUSTION PROCESS | Monika | Indonesian …

Coal combustion process often occurs the problems in the reactor which is caused by fouling and slagging. One of the procedures to reduce the risk of fouling and slagging by blending the coal of Pendopo, Palangkaraya, Muara Enim and Samarinda, with the ratio of 25:75, 50:50, and 75:25.

Observation of coal fragmentation in early stages of …

 · Measurements of coal fragmentation in the early stages of combustion were undertaken in the size range of crushed coals for Chinese Dongjin and Indonesian Roto coals. A flat flame burner fed with a premixed mixture of methane, air and partly hydrogen was used for the burning of a single coal particles. A high speed video camera system was used for the …

Zhiping Zhu''s research works | Chinese Academy of Sciences, …

Zhiping Zhu''s 8 research works with 27 citations and 141 reads, including: Investigation of slagging characteristics and anti-slagging applications for …

Coal Indonesia

 · Coal is characterized by its use as either "steam coal" or "metallurgical coal.". Steam coal, also referred to as "steaming coal" or "thermal coal," is used by electricity generators and by industrial facilities to produce steam, electricity or both. Metallurgical coal describes various grades of coal used in the steel making ...

Slagging Behavior of Upgraded Brown Coal and Bituminous Coal in 145 MW Practical Coal Combustion Boiler …

 · Akiyama K. et al. (2013) Slagging Behavior of Upgraded Brown Coal and Bituminous Coal in 145 MW Practical Coal Combustion Boiler. In: Qi H., Zhao B. (eds) Cleaner Combustion and Sustainable World. ISCC …

(PDF) Investigation on Coal Slagging Characteristics and Combustion Behaviour in …

Slagging in the furnace poses problem to coal power s tation at it reduce the efficiency of heat transfer. to water in water tubes. The right viscosity of coal at high temperature has to be in the ...

Ash Deposition Behavior of Upgraded Brown Coal and Bituminous …

 · Ash with a low melting point causes slagging and fouling problems in pulverized coal combustion boilers. Ash deposition on the heat exchanger tubes reduces the overall heat transfer coefficient due to its low thermal conductivity. The ash composition in coal and operational conditions in boilers such as heat load greatly affect the ash deposition behavior. This study …

MANAGING SLAG BUILDUP IN COAL-FIRED BOILERS

to reduce the risk of severe slagging with a particular coal or coal blend. Indeed, coal slagging and fouling behavior depend on temperature and O 2 distributions in the furnace as well as on parameters such as coal particle size distribution and

Improvement of the Coal Ash Slagging Tendency by Coal …

Coal with a high mullite concentration in ash is generally believed to have a high ash fusion temperature (AFT) and low slagging tendency. Conducted by a mineral transition mechanism at high temperature condition, this presented work investigates the improvement of the coal ash slagging tendency by coal washing and additive blending with mullite generation. AFT is …

Numerical assessment of coals/blends slagging potential in …

 · The first three columns in that row represent the Indian coals, with coal 3 having the highest slagging, followed by coal 1, and then coal 2. The columns 4–7 are for the Australian coals, 8–10 for Indonesian, Columbian and South African coals, 11 and 12 for US 4.7

CORRELATION BETWEEN ASH FUSION TEMPERATURES (AFT) AND …

 · Coals can be classified as having good or poor slugging behavior according to their silica content. The silica has been expressed as mole fraction based on the total formulation % of SiO2. The variation of AFT temperatures with mole fraction of SiO2 is shown in Fig.2.

Gasification and combustion kinetics of a high-ash-fusion-temperature coal using thermogravimetric analysis …

 · Non-slagging (dry-bottom) EFGs are proposed in this work for gasification of high-AFT coals instead of paying the high price for slagging. In the non-slagging mode, which has been well performed in both 0.5 kg h −1 bench-scale and 20 kg h −1 pilot-scale gasifiers, the operation temperature is lower than the AFT of coal.

2--An Application of Coke Microstructure and Microtexture to Indonesian Coal

8 An Application of Coke Microstructure and Microtexture to Indonesian Coal 2.2.2 Coal petrography Both maceral composition and vitrinite reflectance of coals are adopted to be an important index for the contents of organic substances and coal rank. Coal

Combustion and NOx Emission Behavior of Chinese Coals

Abstract. Abstract: Seven Chinese coals ranking from anthracite to sub-bituminous from the Shanxi province were. selected for study to forecast the combustion and NOx emission behavior. Three UK, one. Indonesia and one South Africa coal was included in the study for reference. A …