Erosion Wear in A Slurry Pipe With Multisized Coal And Bottom-Ash Slurries

2017 ◽  
Vol 4 (2) ◽  
pp. 3565-3571 ◽  
Author(s):  
Gurprit Singh ◽  
Satish Kumar ◽  
S.K. Mohapatra
Keyword(s):  
Bottom Ash ◽  
Erosion Wear

scholarly journals Computational analysis of solid particle-erosion produced by bottom ash slurry in 90° elbow

2019 ◽  
Vol 252 ◽  
pp. 04008
Author(s):  
Jashanpreet Singh ◽  
Jatinder Pal Singh ◽  
Mandeep Singh ◽  
Miroslaw Szala
Keyword(s):  
Bottom Ash ◽  
Outer Wall ◽  
Wall Region ◽  
Erosion Wear ◽  
Slurry Erosion ◽  
Low Velocity ◽  
Drag Forces ◽  
Shape Pattern ◽  
Discrete Phase ◽  
Computational Fluid Dynamics Cfd

Present work is devoted to investigation of the slurry erosion wear in a 90° elbow by using commercial Computational fluid dynamics (CFD) code FLUENT. Discrete phase erosion wear model was used to predict erosion in 90° elbow by solving the governing equations through Euler-Lagrange scheme. Particle tracking was considered by using standard k-ε turbulence scheme for the flow of bottom ash slurry. Erosion wear in elbow was investigated along with velocity distribution and turbulence intensity. The radius-to-diameter (r/D) ratio was taken as 1.5. Results show that erosion rate increases with increase in velocity. Present numerical simulation model holds close agreement with previous studies. Distorted patterns appeared at low velocities. The V-shape pattern appeared on the outer wall of elbow at high velocities. The low velocity region occurs around circumference of elbow wall at outer wall of elbow due to stimulation of the drag forces near the wall region.

Study on role of particle shape in erosion wear of austenitic steel using image processing analysis technique

2018 ◽  
Vol 233 (5) ◽  
pp. 712-725 ◽  
Author(s):  
Jashanpreet Singh ◽  
Satish Kumar ◽  
SK Mohapatra
Keyword(s):  
Fly Ash ◽  
Austenitic Steel ◽  
Bottom Ash ◽  
Three Dimensional ◽  
Underlying Mechanism ◽  
Solid Particles ◽  
Erosion Wear ◽  
Sand Surface ◽  
Tailings Sand ◽  
Slurry Pot Tester

Properties of flowing media (e.g. such as fly ash, bottom ash, coal, mineral tailings, sand slurries, etc.) play a crucial role in the service life of centrifugal slurry pump components. Generally, these solid particles vary in shape and size. In literature, a limited number of studies have been carried out to investigate the influence of particle size and shape on erosion wear. Stainless steel (SS 316L) is the most commonly used material for the fabrication of slurry pump components namely, casing, impeller, shafts, and sealing columns. In the present study, the influence of particle type and circularity factor on erosion wear of austenitic steel has been studied. A slurry pot tester (Ducom TR-41) was used to perform the experiments that established the erosion wear of slurry pump austenitic steel under the influence of the parameters noted above. Abrasives used in the current study are fly ash, bottom ash, and sand. Surface smoothness, circularity factor, coefficient of variance, sphericity, and solidity of solid particles were also analyzed prior to performing the experiments. The circularity factor value and erosion wear rate hold a power law relationship. Three-dimensional surface plots were plotted to explain the underlying mechanism of erosion wear.

CFD modeling of erosion wear in pipe bend for the flow of bottom ash suspension

2018 ◽  
Vol 37 (3) ◽  
pp. 275-285 ◽  
Author(s):  
Jashanpreet Singh ◽  
Satish Kumar ◽  
Jatinder Pal Singh ◽  
Prince Kumar ◽  
S. K. Mohapatra
Keyword(s):  
Bottom Ash ◽  
Cfd Modeling ◽  
Erosion Wear ◽  
Pipe Bend

Characterization of lead-bearing phases in municipal waste combustor fly ash

1996 ◽  
Vol 54 ◽  
pp. 516-517
Author(s):  
L. L. Sutter ◽  
G. R. Dewey ◽  
J. F. Sandell
Keyword(s):  
Fly Ash ◽  
Bottom Ash ◽  
Municipal Waste ◽  
Primary Concern ◽  
Leaching Behavior ◽  
Waste Combustion ◽  
Lead And Cadmium ◽  
Lead Speciation ◽  
Accepted Practice

Municipal waste combustion typically involves both energy recovery as well as volume reduction of municipal solid waste prior to landfilling. However, due to environmental concerns, municipal waste combustion (MWC) has not been a widely accepted practice. A primary concern is the leaching behavior of MWC ash when it is stored in a landfill. The ash consists of a finely divided fly ash fraction (10% by volume) and a coarser bottom ash (90% by volume). Typically, MWC fly ash fails tests used to evaluate leaching behavior due to high amounts of soluble lead and cadmium species. The focus of this study was to identify specific lead bearing phases in MWC fly ash. Detailed information regarding lead speciation is necessary to completely understand the leaching behavior of MWC ash.

VALUE INCREASING OF REJECT COAL WITH BIOMASS ADDING AS BIO-COAL BRIQUETTE

2020 ◽  
Vol 3 (2) ◽  
pp. 123
Author(s):  
Dyah Marganingrum ◽  
Lenny Marilyn Estiaty
Keyword(s):  
Alternative Energy ◽  
Ignition Time ◽  
Bottom Ash ◽  
Calorific Value ◽  
Added Value ◽  
Physical Test ◽  
Chemical Test ◽  
Agglomeration Process ◽  
Strategic Solution ◽  
Index Value

Aim: This paper aims to explain the added value increasing method of reject coal which has not utilized by the company. Methodology and Results: The method to increase added value in this study used the agglomeration process of briquettes form that changing composition by adding biomass. The biomass functions to minimize bottom ash produced from burning briquettes so that the briquettes burn entirely. Stages processes in this study consist of characterization, briquetting, physical test, and chemical test. Based on the analysis, reject coal still has a high calorific value of 5,929 cal/gr. Shapes and sizes that were not following needs of coal market or consumer due to reject coal to be a waste. Briquettes have been successfully produced and meet specification requirements based on applicable regulations in Indonesia. Besides physical properties, the briquette meet density requirements which are greater than or equal to 1 gr/cm3 and shatter index value is less than 0.5%. The gas emission test shows below threshold, which is CO 0-30 ppm, H2S 0-3.6 ppm, and NOx is not detected. After evaluation, it showed that by adding 30% biomass, ignition time could be decreased and remaining unburned briquettes or bottom ash was reduced as much as 68.68%. Conclusion, significance and impact study: The bio-coal briquettes is a strategic solution to environmental problems and alternative energy sources that are environmentally friendly, because CO and H2S emissions are still below the threshold, even for NOx not detected. Making Bio-coal briquettes as a solution to the utilization of reject coal mining waste to be used as an alternative energy source has been successfully carried out.

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