The secondary air has a large impact on both the concentration of raw generated NO x and the thermal efficiency of the boiler; the primary air mainly plays the role of preheating and conveying pulverized coal providing the oxygen for the combustion generally accounting for a small proportion of the total air volume which has a small impact
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— Computational modeling of pulverized coal fired boilers A review on the current position Author links open overlay panel G Sankar a D Ensuring the reliable operation of industrial boilers with high production efficiency and low pollutant emissions remains a significant challenge due to the complex chemical and physical reactions that
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— Cleaning out the pulverized coal deposited at the bottom of a coalbed methane CBM well is key to achieving continuous CBM drainage and prolonging the workover period In this study Fluent is used in conjunction with the standard k ε model and the Eulerian Eulerian model to simulate and analyse jet erosion of deposited pulverized
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— Coal fired power plants are one of the major sources of CO 2 emission and the novel application of directly co firing the carbon free fuel ammonia into the coal fired power plants is emerging as a promising method of CO 2 emission reduction In this study simulations of the boiler system of a 600 MW e coal fired power plant unit were performed
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— ways to improve the efficiency of pulverized coal fired boilers This could involve developing new combustion technologies that are able to more thoroughly burn the coal and produce less waste or
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— The blast furnace BF ironmaking has irreplaceable technological advantages such as the simple process and high production efficiency Effect of natural gas injection point on combustion and gasification efficiency of pulverized coal under blast furnace condition ISIJ Int 59 12 2019 pp 2165 2173 Crossref View in Scopus
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— effect of the mass flowrate of coal and air classifier geometry and the opening of the spiral guide vanes on the coal classification efficiency [5 6] It is worth to mention that the optimum quality of classification for coals such as lignite is achieved when 70% of coal particles exiting the classifier is smaller than 75 μm [7 8]
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— Thermal power plants have pulverized coal fired boilers The pulverizer is one of the most important unit of the plant The coal after being crushed in the pulverizer to a specific mesh size is then taken to the boiler for combustion Hence it is of significant research interest to improve the operational performance and efficiency of coal
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— The primary condition to achieve clean and efficient coal combustion is to ensure efficient combustion that is to improve the combustion efficiency of pulverized coal [6] which is mainly relevant to such cardinal factors as the coal type [7] combustion temperature [8] reaction atmosphere [9] and reaction time [10] It is conducive to
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It is found that the high ash content Indian coal samples have a tendency to produce less N O x A % reduction in the N O x is obtained for the coal sample with % ash compared to that with % ash The results suggest that the combustion performance is enhanced when the ash content falls within an optimum range of 20 − 35 %
Yêu cầu trực tuyến →— Ammonia NH3 as a derivative of hydrogen and energy carrier is regarded as a low carbon fuel provided that it is produced from a renewable source or a carbon abated process of fossil fuel Co firing ammonia with coal is a promising option for pulverized coal fired power plants to reduce CO2 emission Applying the co firing in an existing
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— Pulverized coal boilers are often in a state of frequent changes in load coal type combustion and other parameters emission and high efficiency is proposed The simulation results illustrate that the control strategy can effectively improve the operational flexibility of thermal power units and achieve the goal of energy saving and
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