· Limestone particle attrition was investigated in a small circulating fluidized bed reactor at temperatures from 25 to 850 C, 1 atm pressure and superficial gas velocities from 4.8 to 6.2 m/s.
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· Adding limestone to coal combustion reduces SO 2 emissions but sometimes increases NO emissions, posing a challenge for synergistic SO 2 and NO control in circulating fluidized bed (CFB) boilers. Limestone in the CFB furnace can participate in the conversion of sulfur and nitrogen compounds from coal and its devolatilized coke.
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:Circulating Fluidized BedCFB · We compared the direct desulfurization behavior of four different domestic limestone samples (CaO fraction 40–55%, average particle size 37.5 μm) using a
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· Abstract This study investigated that status of domestic and international furnace desulfurization and desulfurization characteristics oflimestone for fluidized bed use depending on the technology for CFBC one of the CCPs. Limestone-based desulfurizing agentis one of the superior elements which are optimal at around 850-950 o C on high
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· The aim of the paper is to study the limestone sulfation behavior under oxy-fuel circulating fluidized bed combustion condition. The calcination of CaCO 3 , pore structure of product layer, and calcium conversion under the air and oxy-fuel combustion conditions were investigated in an oxy-CFB combustor.
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:Circulating Fluidized BedCFB · This study investigated that status of domestic and international furnace desulfurization and desulfurization characteristics of limestone for fluidized bed use depending on the technology for
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· Increasing the utilization of circulating fluidized bed Two biggest problems in present Indian pulverized coal combustion In the design modelling of CFB boiler, the input data such as operating steam parameters, fuel and limestone analysis, solid properties7,
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· Coal slime can be disposed in quantity and fully utilized in a well-designed circulating fluidized bed (CFB) boiler, but the nitrogen oxides (NOx) and sulphur dioxide (SO2) emissions generated in the combustion of coal slime have contributed to serious atmospheric pollution. High Temperature & Post-combustion Technology, a novel and
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: Ye Bin Kim, You Ra Gwak, Sang In Keel, Jin Han Yun, See Hoon Lee · Circulating fluidized beds (CFB) are commercially available technology that could be applied for CO 2 capture. The high gas and solids velocities promote
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:Publish Year:2007L. Jia, R. Hughes, D. Lu, E. J. Anthony, I. Lau · Sulfur capture by limestone particles in a circulating fluidized bed is studied by modeling. Small particles are reactive but they have a short residence time
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· Circulating fluidized bed combustion (CFBC) is a well-established combustion technology for firing biomass, waste-derived fuels and high-sulfur fuels, among others. The technology achieved commercial importance in the late 1980s and there are now over 900 large-scale utility-operated boilers worldwide [1] .
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· DOI: 10.1016/j.scitotenv.2020.143704 Corpus ID: 227182510 A comparative evaluation of recarbonated CaCO3 derived from limestone under oxy-fuel circulating fluidized bed conditions. @article{Kang2020ACE, title={A comparative evaluation of recarbonated CaCO3
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:Circulating Fluidized BedLimestone DesulfurizationDOI: 10.1016/J.FUEL.2007.06.012 Corpus ID: 96783650 Limestone particle attrition and size distribution in a small circulating fluidized bed @article{Chen2008LimestonePA, title={Limestone particle attrition and size distribution in a small circulating fluidized bed
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:Circulating Fluidized BedCfb LimestonePublish Year:2020 · This work presents a practical result of experimental investigation of the limestone particle size effect on de-SO x from a circulating fluidized bed combustion
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· Limestone attrition in circulating fluidized-bed combustors (CFBCs) has received limited attention. Although there are a number of early studies on attrition in bubbling-bed systems, most current studies focus on simultaneous calcination and sulfation. However, this subject is increasing in importance as CO2 looping cycles are proposed.
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For large-scale plants, ultra-supercritical steam at 257 bar and 603°C is available. Circulating Fluidized Bed (CFB) boilers combine high-efficiency combustion with fuel flexibility. The technology can use local alternative renewable fuels like waste to produce cleaner energy and contribute to fossil fuel and CO2 emissions reduction.
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· To determine whether limestone can still be used to capture SO 2 in-situ in circulating fluidized bed (CFB) boilers with such a high H 2 O concentration, its sulfation behavior was studied. Using a constant-temperature thermogravimetric analyzer, the influences of high H 2 O concentration, SO 2 concentration, temperature and particle
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· Sulfur capture by limestone particles in a circulating fluidized bed is studied by modeling. Small particles are reactive but they have a short residence time depending on the separation efficiency of the cyclone. With large particles, the residence time is longer, but the rate and degree of sulfur capture are lower. Then the large
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： Ca(OH)(2) and limestone were added to lignite (S content 1.23% by mass) and combusted in an industrial fluidized-bed boiler (elec. capacity 235 MW) with an activated fly ash-feeding system. The addn. of Ca(OH)(2) resulted in decrease in SO2 content in
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· The gas–solid flow characteristics of an industrial-scale multiple-branching limestone-conveying pipeline system of a 200 MW circulating fluidized bed boiler were studied using a computational
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· In the case of fluidized bed units, interactions with silicates (in the sand) increase the risk of bed agglomeration. To reduce these difficulties, some researchers have explored the addition of alumina, dolomite, kaolin or limestone in the bed inventory [14]. The co-combustion of coal and residual biomass has been found to decrease
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The influence of different conditions on the sulfur-capture efficiency during fluidized-bed desulfurization was studied using both experimental and modeling methods. The effects of the temperature (∼1120 or ∼1200 K) and gas atmosphere (90% N2 or 90% CO2) were studied using one limestone type. The CO2 atmosphere increased the degree of
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· Circulating fluidized bed combustion technology has been widely used as an advanced energy-saving and environmentally friendly coal combustion technology. Circulating fluidized bed combustion ash (CFBCA) is a by-product during the combustion of sulfur-containing fuels at about 900 °C in circulating fluidized bed combustion boilers
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· If the fuel is rich in sulfur, limestone can be added into the fluidized bed combustor. Then the limestone undergoes calcination and reacts with the SO 2 generated during fuel combustion. This is an in situ desulfurization of the combustion process and decreases SO 2 emissions from the combustion chamber significantly.
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:Circulating Fluidized BedPublish Year:2007J. J. Saastamoinen · Limestone attrition in circulating fluidized-bed combustors (CFBCs) has received limited attention. Although there are a number of early studies on attrition in
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· Limestone addition to circulating fluidized bed boilers for sulfur removal affects nitrous oxide (N2O) emission at the same time, but mechanism of how sulfation process influences the surface
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· Liu H, Gibbs BM (1998) The influence of limestone addition at different positions on gaseous emissions from a coal-fired circulating fluidized bed combustor. Fuel 77(14):1569–1577 Article Google Scholar Liu RZ, Fan ZG, Liu PY (2018) Discussion
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· At low loads, the desulfurization efficiency of circulating fluidized bed (CFB) boilers tends to decrease due to the deviation of low bed temperature from the optimal temperature required for limestone desulfurization. However, carbide slag, a waste product rich in Ca(OH)2 and possessing a low decomposition temperature, can be an
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DOI: 10.1016/J.JOEI.2017.02.005 Corpus ID: 102474935 Study on the limestone sulfation behavior under oxy-fuel circulating fluidized bed combustion condition @article{Li2017StudyOT, title={Study on the limestone sulfation behavior under oxy-fuel circulating fluidized bed combustion condition}, author={Wei Li and Shiyuan Li and
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· Limestone has been widely used to remove SO2 from Circulating Fluidized Bed (CFB) boilers. As the main component of limestone, CaCO3 firstly undergoes calcination to CaO which is then sulfated by
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