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Kumar, H.
- Maximum Semi-fluidization Velocity of Gas-liquid-solid Semi-fluidized Beds
Abstract Views :852 |
PDF Views:0
Authors
Affiliations
1 Department, National Institute of Technology, Raipur -492001, IN
2 Department, National Institute of Technology, Raipur-492001, IN
3 Department, Raipur Institute of Technology, Raipur -492001, IN
1 Department, National Institute of Technology, Raipur -492001, IN
2 Department, National Institute of Technology, Raipur-492001, IN
3 Department, Raipur Institute of Technology, Raipur -492001, IN
Source
International Journal of Technology, Vol 3, No 1 (2013), Pagination: 11-14Abstract
Semi-fluidized beds are found to have wide applications in process industries. In the present study hydrodynamic viz., maximum semi-fluidization velocity of gas-liquid-solid semi-fluidized bed has been studied. The necessity of generalized correlation for the prediction of maximum semi-fluidization is emphasized. Experiments have been conducted in a 100 mm ID, 1.8m height vertical Plexiglas column using air, water and solid (of different densities) in order to develop a good understanding of each flow regime in gas-liquid-solid semi-fluidization. It is found that maximum semi-fluidization velocity is strong function of superficial gas velocity, particle size, particle density and bed expansion ratio. Values of the maximum semi-fluidization velocity, obtained from experimental investigations have been compared with calculated values.Keywords
Gas-liquid-solid semi-fluidization, Maximum Semi-fluidization Velocity, Correlation, Expansion Ratio, Particle Size.
References
- Chern, S. H., Fan L. S. and Muroyama K., Hydrodynamics of Cocurrent gas-Liquid Solid Semi-fluidization with Liquid as the Continuous Phase, AIChE Journal. 1984; 30(2); 288-294.
- Fan, L.T. and Wen, C.Y., Mechanics of Semi-fluidization of single size particles in solid-liquid systems, AIChE Journal. 1961; 7; 606-610.
- Ho, T.C., Yau S.J. and Hopper, J.R., Hydrodynamics of Semifluidization in Gas-Liquid systems, Powder Technology. 1987; 50; 25-34.
- Jena, H. M., Roy, G. K. and Meikap, B. C., Prediction of gas holdup in three phase fluidized bed from bed pressure drop measurement, Chemical Engineering Research and Design. 2008; 86; 1301-1308.
- Kunii D. and Levenspiel O., Fluidization Engineering. 2nd ed. Butterworth-Heinemann, MA, USA, 1991.
- Murthy J. S. N. and Roy G. K., Semi-fluidization: a Review, Indian Chemical Engineer 1986; 29 (2); 9-22.
- Shrivastava P. V., Soni A. B., Kumar H. K., Prediction of Minimum semi-fluidization Velocity of Gas-liquid-solid Semifluidized beds, International Journal of Chemical Sciences. 2012; 10(4).
- Roy, G. K. and Sharma, K. J. R., Dynamics of Liquid-Solid Semi-fluidization: Prediction of Semi-fluidization Velocity and Packed Bed Formation, Indian Journal of Technology. 1973; 2; 237.
- Sen Gupta, P. and Roy, G. K., Prediction of the Packed Bed Height in Gas-Solid Semi-fluidization, Ind. Eng. Chem. Process Des. Develop. 1974; 13(63); 219-221.
- Singh, R. K., Maharathy, A. K. and Mahapatra, A. K., Prediction of Pressure Drop in Three-phase Semi-fluidized Bed for Nonspherical Particles, Chemical Engineering World. 2005; 40 (9); 86-88.
- Soni A. B., Kumar H. and Shrivastava Pooja V., Studies on Momentum transfer aspects of semi-fluidized bed in annular section, IUP Journal of Chemical Engineering, 2010; 2(4); 37-42.
- Environmental impact assessment and Feasibility of a Coal Beneficiation Plant
Abstract Views :753 |
PDF Views:0
Authors
Vaishali Pendse
1,
H. Kumar
2
Affiliations
1 Department of Chemical Engineering, Raipur Institute of Technology, Raipur, IN
2 Chhattisgarh Council of Science and Technology, Raipur, IN
1 Department of Chemical Engineering, Raipur Institute of Technology, Raipur, IN
2 Chhattisgarh Council of Science and Technology, Raipur, IN
Source
International Journal of Technology, Vol 3, No 1 (2013), Pagination: 29-32Abstract
Environmental Impact Assessment (EIA) represents a systematic and well defined process which examines the environmental consequences of the development actions of any proposed activity beforehand. The existing guidelines have been prescribed by a Government of India (MOEF) notification. Screening Scoping, Public Hearing followed by appraisal are the primary components of an EIA. A case study has been presented for the proposed establishment of a coal beneficiation plant. After conducting baseline environmental study, the incremental pollution loads have been assessed. The cumulative analysis of the study suggests that the project is environmentally feasible.Keywords
Environment Impact Assessment, Environmental Management Plan, Coal Beneficiation Plant, Ambient Air Quality, Water Quality.References
- EPCT (1997). “Draft Report - Environmental Impact Assessment in Oil and Gas Sector”, survey work conducted by Engineering Planning Consultancy Team, Sylhet.
- Gaikwad R.W. (2006), Environment Engineering, Deneett Publication.
- Gaikwad R.W. and SapkalR.S.(2006), Environmental Engineering, Deneett Publication
- Kulkarni Vijay and Ramachandra T.V. (2011), Environment Management, Teri Publication.
- MOEF EIA notification September (2006), Govt. Of India, Ministry of Environment and Forest.
- Sen Kalyan, Das N. S., Singh Ashok K. and Dasgupta R.(2003), Search for Appropriate Strategy on Coal Utilization- A Pressing Need for Sustainable Development in Jharia Coalfield- MGMI Chapter at Indian School of Mines, Dhanbad
- Singh Ashok K, Sen Kalyan, Mukherjee A. K., ChaudhuriS. G. and ChatterjeeC. N. (2000), Production Trend and Demand for Coking and Power Coal in India- JCAOL, Japan and CFRI India New Delhi.
- Sohony R.A. and Verma S.K. (1999), Impact of Thermal Power Generation on Environment :Indian Scenario, Seminar on Management of Environmental Pollution.