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Slurries are suitable for on-site preparation and storage as well as pipeline pumping [5] and spraying in a furnace [6], [7]. A large proportion of water in a fuel …
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The resulting coal slurry must then be stored, often with coal ash (see below) or in improvised ponds that can leak, spill, or fail. In 2000, the bottom of a Kentucky coal slurry impoundment gave way, …
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Abstract. In this paper, based on Fluent software, a five-nozzle gasifier reactor was established to simulate the gasification process of oil-based drill cuttings coal-water slurry. The influence of concentration and oxygen/carbon atomic ratio on the gasification process of oil-based drill cuttings coal-water slurry was investigated.
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1. Introduction. Coal is one of the most widespread and cheapest fossil fuels. Coal accounts for 37–41% of today global electricity production, and its annual consumption exceeds 3.7 billion tons of oil equivalent [1].However, coal is also one of the "dirtiest" fuels, whose combustion is accompanied by high COx, NOx, and SOx emissions, large …
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The grinding process lasted for 20 to 30 min, and the resulting coal dust had a typical particle size of 80 to 100 μm. To create coal-water slurry fuel, the coal dust was combined with water and a plasticizer (Neolas plasticizer) using an MPW-324 homogenizer. The plasticizer was used to enhance the mixing stability of compositions within CWSP.
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The focus of this study is on CWSFs (Coal-Water Slurry Fuels) produced from bituminous coals for use in oil-designed utility and industrial boilers. While CWSFs can be produced from anthracite and low-rank coals, their physical and chemical properties differ from those of bituminous fuels.
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800329. Three slurry fuels containing different concentrations of coal have been tested in a small-bore 4-cylinder diesel engine equipped with modified injectors under various loads and speeds. The coal in the slurry was a finely pulverized coal having a mean particle diameter of 2.05 micrometers. Exhaust temperatures, smoke, blowby, and brake ...
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Coal Storage and Transportation. James M. Ekmann, Patrick H. Le, in Encyclopedia of Energy, 2004 1.4 Transport by Slurry Pipelines. Pipelines carrying solids such as coal, iron concentrate, and copper concentrate follow the same process: (1) the solids are ground to a fine size, (2) mixed with a liquid vehicle such as water, and (3) pumped through a buried …
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In feasibility study, the transition from bituminous coal to stabilized fuel slurries were analyzed, considering the new technological chain and equipment, the generated …
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Slurry composition is likely a complex function of the geology, mineralogy, trace-element content, rank of the coal being processed, and proprietary chemicals used in the cleaning water ( Ducatman et al., 2010; Orem et al., 2009; W. Orem, oral comm., 2011). Studies of groundwater quality near slurry impoundments may provide some insights into ...
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PDF | On Oct 27, 2023, Simbabalwe Rune and others published An Overview of Coal-Water Slurry Fuels | Find, read and cite all the research you need on ResearchGate
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Coal slurry is first prepared by crushing the coal to a size of 0.2 mm particle diameter along with water addition. The coal slurry is the pumped to the gasifier where the reactions take place in the controlled amount of oxygen. The gasifier effluent contains a mixture of gaseous products including CO, H 2, CO 2, H 2 O, Ar, H 2 S and minor quantities of …
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The utilization of coal in the form of coal water slurry is a better and efficient method to control the harmful pollutants viz. NOx and SOx. Coal water slurry is a complex, high energy density, multiphase fuel. The rheological characteristics of the coal water slurry are quite comparable to those of the heavy oil.
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A coal-water slurry fuel (CWSF) program is being undertaken to determine if CWSFs prepared from cleaned coal (containing approximately 3.5 wt.% ash and 0.9 wt.% sulfur) can be burned effectively in a heavy fuel oil-designed industrial boiler without adverse impact on boiler rating, maintainability, reliability, and availability.
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In feasibility study, the transition from bituminous coal to stabilized fuel slurries were analyzed, considering the new technological chain and equipment, the generated power and fuel cost. The cost for the full cycle of preparation of the slurry coal slime–water–soy lecithin will be 7.5% higher than when using bituminous coal.
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Coal-water slurry(CWS) engine tests designed toinvestigate the ignition andcombustion processes of the fuel aredescribed in this paper. The ffects of three different parameters, namely, (a)needle lift pressure, (b)fuel injection timing, and (c) percent coal loading inthe slurry fuel are studied in detail. Successful operation of the ngine using ...
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PDF | In this work we consider coal-water slurry fuels as an alternative to the traditional types of fuels, in particular, coal. Assessment is performed... | Find, read …
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1. Introduction. The demand for primary fossil fuel energy has increased with industrialization. Since 1970, researchers have started to pay attention to coal water slurry (CWS) in the hope that this liquid fuel could replace petroleum [1].CWS is a heterogeneous dispersion system composed of coal, water and chemical additives [2], [3].CWS has …
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The coal–water slurry burned in DICE is 55% "micronised refined coal" (MRC) and 45% water by weight with an LHV of 14 513 kJ/kg. There are five DICEs in the plant, each rated at 15.7 MWe and 42.5% (net LHV) efficiency. Natural gas is burned in the reheat combustor (18% of total plant fuel energy input). Net plant output is 106 MWe at …
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Of the different additives, the viscosity reduction effect of Tween 80 in the waste oil-coal-water slurry was best. Further, the comprehensive performance of the waste oil-coal-water slurry, including slurry ability, stability and fluidity, was found to be best at a water content of 10% and a Tween 80 content of 5%.
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When the focus is on minimizing the fuel mixture viscosity, the optimal slurry is 40% filter cake C and 60% water. Its efficiency is 0.822. The same result is true for the variation with minimizing the fuel cost. In terms of minimizing the ash content of the fuel slurry, the optimal variant is the fuel slurry with 50% lignite (<80 µm) and 50% ...
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4000 equipment. TGA doin g such type of analyses tha t . ... The purpose of this research was to present a complete blue print for the production of coal water slurry fuel in Pakistan. The ...
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The temperature in the reactor was varied in the range of 1200–1400 °C. An analysis of the composition of the gas obtained during the gasification of three fuels showed that the coal–water-slurry (40 …
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The co-slurrying technology of coal and organic wastewater, which achieves the simultaneous disposal and utilization of wastewater, has attracted extensive attention in recent years. The emission of coal gasification wastewater causes serious environmental hazards, because of its large amount, high organic content, and high toxicity. In the …
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Coal water slurry (CWS) is considered a promising oil substitute. It is a coal-based, fluid clean fuel, characterized by low pollution levels, economical cost, and superior combustion efficiency [ 5, 6 ]. A typical CWS primarily comprises 60–75% coal, 25–40% water, and approximately 1% additives [ 7 ].
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There are a number of incentives for potential users of coal slurry fuels--and in particular for coal-water mixtures (CWMs) which the authors address in this paper. First, CWM represents an assured supply of fuel at a price which is quite easily predictable into future years. Second CWM is available in the near term. There are no substantial advances in …
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The rheological nature of coal-water suspensions of two Indian coal samples (namely coal 1 and coal 2) was reported and compared in the shear rate range of 60–160 s⁻¹ at constant pH of 8.
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Highlights Genesee coal water slurry spray angle is narrower than the petroleum coke alternative. Larger droplets occupy the outside spray periphery while small droplets occupy most of the spray cross section. Petroleum coke size statistics are in average 4% larger than the Genesee coal. The spray velocity vector field suggests a …
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In coal utilization: Coal-water slurry fuel. Pulverized coal can be mixed with water and made into a slurry, which can be handled like a liquid fuel and burned in a boiler designed to burn oil. Coal-water slurry fuel (CWSF) normally consists of 50–70 percent pulverized or micronized coal,… Read More; transport by pipelines
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coal-water slurry fuel, coal of gas grades is mainly used, which is characterized by high content of volatile ... materials was carried out using this equipment. The aim
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