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Showing 1 to 20 of 21 for “"Rotary kiln."”.
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Mathematical model of a cement rotary kiln.
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1967
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Direct reduction of iron ore in a rotary kiln
… hematite iron ore was reduced successfully in a rotary kiln with a gaseous reactant which was prepared by reforming butane within the kiln, using the beneficial effect of iron/iron oxide as an autocatalyst. The optimum ratio of the gaseous reactants, H2/CO2/C4H10, was used to prevent undesirable …
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Combustion of lignin-oil-water mixtures in a rotary kiln
… lignin would be used as a fuel in the lime kiln, replacing the external fuel, such as natural gas or fuel oil, presently used. In this work lignin-oil-water mixtures were investigated as a fuel. The rheology of the lignin-oil-water mixtures was studied; and a pilot scale preparation facility …
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Rotary kiln transport phenomena: a study of the bed motion and heat transfer
Thermal processing of materials in rotary kilns involves heat transfer from the freeboard to the boundary surfaces of bed material and the distribution of this thermal energy within the granular bed. Although the former has been reasonably well characterized, the latter has not, mainly because of …
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Rotary kiln incineration of hazardous wastes: pilot-scale studies at Louisiana State University
… wastes are conducted in the pilot-scale rotary kiln incinerator (RKI) at Louisiana State University (LSU) in Baton Rouge, Louisiana. The purpose of the research is to investigate methods of treating and destroying hazardous wastes in a cost-effective and environmentally sound way. The …
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Dealing With Uncertainty in Engineering and Management Practices
… and (5) process control of an industrial rotary kiln. The proposed methods are applied to several engineering and management cases to demonstrate their explicabilities and advantages. In the field (1), an integrated approach is presented to assess traffic noise impact under uncertainty …
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Pollution control upgrade of a hazardous waste incinerator to comply with regulatory requirements
… propellants used in conventional munitions. Two rotary kiln incinerators are used to destroy waste propellant generated during the manufacturing process. These two units are the only hazardous waste incinerators owned by the Army for the destruction of waste propellant. They are also two of the …
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Parallel implementation and application of particle scale heat transfer in the Discrete Element Method
… to investigate particle scale heat transfer in rotary kiln and fluidized bed environments. The strongly coupled CFD and DEM calculations are parallelized using the OpenMP paradigm which provides the flexibility needed for the multimodal parallelism encountered in fluid-particulate systems. The …
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Thermal treatment of organic contaminated solids and waste : experiment, model and mass balance
… It is determined that the heat loss from kiln shell to environment demands the major fraction (56 percent) of the energy requirements in the bench scale thermal desorber. However, only 6 percent of total energy requirement is due to this heat loss to environment in a full scale desorber. …
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TNT-contaminated soils remediation for volunteer Army ammunitions plant
… Technology Corporation countercurrent rotary kiln incineration is recommended for soils at the V AAP facility with a total remedial cost of approximately $12,822,000. The Technology Background, Technology Applications, Technology for Soils Remediation, Remedial Design and …
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Hazardous waste treatment and disposal: alternative technologies and groundwater impacts
… to hazardous waste; major ones include rotary kiln, liquid injection, and cement kiln incineration; neutralization, chemical oxidation-reduction, and ion exchange; filtration, distillation and settling techniques; and activated sludge, aerated lagoon, and landfarming treatment. Emerging …
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An evaluation of lime residuals management alternatives for water utilities
… capital costs due to the need to purchase a rotary kiln. Cement manufacturing has the highest operations and maintenance costs, and recalcination presents a net savings in operations and maintenance costs due to the chemical savings associated with reduced lime usage. Overall, recalcination …
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Application of chemical kinetic modeling to improve design and performance criteria for a practical incineration system
… -the Secondary Combustion Chamber (SCC) of the Rotary Kiln incineration Simulator (RKIS) at the EPA facility at Research Triangle Park, NC. The networked ideal model was developed using analysis of reactor geometry, temperature profile measurements, and SO_2 tracer data provided by EPA. A …
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Industrial rotating kiln simulation
… oil shales. As part of this process, a rotating kiln is used to pyrolyse the organic component of the oil shales. The configuration and application of this rotating kiln is unique and hence previous rotating kiln models cannot be used to predict the solid behaviour in the current processor. It is …
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Kraft lignin as a fuel for the rotary lime kiln
… a solid fuel which could be burned in the lime kiln. In order to test the suitability of the precipitated lignin as an alternate fuel, a 0.4 m ID by 5.5 m pilot rotary kiln was modified with a computer controlled screw feed system and a water-cooled lance in order to burn dry powdered lignin, …
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ADVANCED MINERALOGICAL AND CRYSTALLOGRAPHICAL TECHNIQUES FOR UNDERSTANDING TRANSFORMATION PROCESSES IN NATURAL MATERIALS AND THEIR SYNTHETIC ANALOGOUS
… at HT a fine mixture of limestone and clay in a rotary kiln. Nowadays, cement manufacture represents the 3rd anthropogenic CO2 emission source due to the high CO2 emission during the decomposition of limestone. Therefore, many efforts have been made over last decades trying to reduce the …
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The microstructure of synthetic aggregate produced from waste materials and its influence on the properties of concrete
… and fired in a small bench top model Trefoil rotary kiln. Various temperature profiles were simulated and the effects of firing condition on the water absorption, relative density and mineralogical and microstructural evolution of the synthetic aggregate were investigated. Powder X-ray …
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Simulation of Combustion and Thermal-flow Inside a Petroleum Coke Rotary Calcining Kiln
… the calcining process inside the long slender kiln. Simplified models are employed to simulate the moving petocke bed with a uniform distribution of moisture evaporation, devolatilization, and coke fines entrainment rate with a conjugate radiation-convection-conduction calculation. The results …
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Flash calcination of limestone in a bench-scale sorbent activation process (SAP) unit
… thermal decomposition of limestone (CaCO3) in a rotary kiln. The surface area of commercial quicklime, a key parameter of reactivity, is typically < 2 m2/g. Therefore, increasing the surface area of quicklime in a cost-effective process would enhance its effectiveness as a sorbent for control of …
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Co-pyrolysis of torrefied biomass and coal : product evaluation and reaction modelling
… biomass was produced at 280 °C in a pilot rotary kiln and subsequently co-pyrolysis was conducted in a fixed bed reactor at variable mix ratios (25-75 wt.%), temperatures (400-600 °C) and pressures (1-30 bar) to investigate the extent of secondary- and synergistic reactions. The results …
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