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fluidized bed accumulation

Numerical study on the effect of fine coal

2015-10-1  One important phenomenon in coal beneficiation fluidized bed (CBFB) is the accumulation of fine coal particles in beneficiation due to poor screening efficiency and attrition of coal samples. The effect of fine coal accumulation is numerically studied in this work using a TFM–DEM hybrid model.

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... coal accumulation in a coal beneficiation fluidized bed ...

2015-6-9  One important phenomenon in coal beneficiation fluidized bed (CBFB) is the accumulation of fine coal particles in beneficiation due to poor screening efficiency and attrition of coal samples. The effect of fine coal accumulation is numerically studied in ...

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Fluidized-bed gasification of high-ash South African coals ...

2011-11-10  Fluidized-bed combustion and gasification technologies have been identified as potential technologies that can be applied for the utilisation of raw (unwashed) high-ash coals and stockpiled discards with reduced environmental impact. The advantage of fluidized-bed

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Charge transfer and bipolar charging of particles in a ...

2021-2-1  In a fluidized bed of polyethylene particles in a glass column, a high wall–particle work function difference leads to wall-particle charge transfer and negative charge accumulation in the bed. Replacing polyethylene particles with glass beads causes the wall–particle work function difference to vanish, which results in dominant bipolar charging and nil net particle charge.

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Estimation of Bubble Properties in Bubbling Fluidized

2018-5-30  In bubbling fluidized beds, important bubble properties can be estimated using electrical capacitance volume tomography (ECVT). The resolution of ECVT depends on sensor configuration and image reconstruction algorithm. At low resolution, the estimation of bubble size critically relies on threshold solids volume fraction.

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Heat transfer effect in scaling-up a fluidized bed

The gas phase species balance is written as the terms of convection, accumulation, and reaction: (1) where u 0 is the superficial velocity of gas (m s −1), α s the solid holdup in the reactor, A the cross sectional area of fluidized bed reactor (m 2), R g,i the

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Role of microbial accumulation in biological sulphate ...

This study evaluated the impact of substrate accumulation (sulphate and polyhydroxybutyrate (PHB)) on bioprocess control of a sulfate reducing inversed fluidized bed bioreactor. To investigate the impact of substrate accumulation, step feed changes were induced to an inversed fluidized bed bioreactor performing biological sulphate reduction.

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Biomass steam gasification in bubbling fluidized bed

2019-3-8  As shown in Fig. 7, very few particles leave the fluidized bed furnace with gas at 20 s. So, in the experimental study, the sand and biochar are circulated from a combustor with high-speed air to remove the accumulation of biochar and get external heat in the reactor, and sands re-entering the fluidized bed furnace.

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Control of a Fluidized Bed Polyethylene Reactor

2021-6-20  Iran. J. Chem. Chem. Eng. Control of a Fluidized Bed Vol. 27, No.3, 2008 89 3- Bubble phase has plug flow pattern and its properties change differentially through the bed. 4- No elutriation of solids occurs. 5- Heat and mass transfer resistances between solid 0 and gas phases are negligible. 6- Solid particles have an average size.

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杨海瑞-清华大学能源与动力工程系 - Tsinghua University

2021-5-7  Wang QG, Yin WD,Yang HR,Numerical study on the effect of fine coal accumulation in a coal beneficiation fluidized bedPOWDER TECHNOLOGY ,283,2015, 570-578 Wang QG, Yang HR, Numerical study of the effect of operation parameters on particle segregation in a coal beneficiation fluidized bed

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... coal accumulation in a coal beneficiation fluidized bed ...

2015-6-9  One important phenomenon in coal beneficiation fluidized bed (CBFB) is the accumulation of fine coal particles in beneficiation due to poor screening efficiency and attrition of coal samples. The effect of fine coal accumulation is numerically studied in ...

Read More
Accumulation of Metabolic Intermediates during

Groundwater containing benzene, toluene, and p-xylene (BTX) was treated in fluidized bed reactors using nonactivated carbon (FBR) and activated carbon (BAC-FBR) as the biofilm carriers.BTX removal and accumulation of metabolic intermediates were studied at steady state and during single-substrate step-loading increases.

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Experimental on nitrite accumulation in biological fluidized bed

Nitrite accumulation during nitrification in biofilm in down-flow biological fluldized bed reactor was studied.The results showed that at the beginning of operation after inoculation, there was nitrite accumulation, but ammonia-N removal rate was still up to 97%.Wth ...

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Numerical study on the effect of fine coal

One important phenomenon in coal beneficiation fluidized bed (CBFB) is the accumulation of fine coal particles in beneficiation due to poor screening efficiency and attrition of coal samples. The effect of fine coal accumulation is numerically studied in this work using a TFM–DEM hybrid model. The gas phase and medium solid phase are modeled by []

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Numerical study on the effect of fine coal

Numerical study on the effect of fine coal accumulation in a coal beneficiation fluidized bed [2015] Wang, Qinggong; Yin, Weidi; Yang, Hairui; Lu, Junfu; et al.

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Stimulating accumulation of nitrifying bacteria in

Stimulating accumulation of nitrifying bacteria in porous carrier by addition of inorganic carbon in a continuous-flow fluidized bed wastewater treatment reactor. Jun BH(1), Tanji Y, Unno H. Author information: (1)Department of Biotechnology, School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku ...

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Estimation of Bubble Properties in Bubbling Fluidized

2018-5-30  Bubbling/slugging flow behavior in a cylindrical fluidized bed: ECT measurements and two-fluid simulations. Chemical Engineering Journal 2020, 383, 123120. DOI: 10.1016/j.cej.2019.123120. Brajesh K. Singh, Shantanu Roy, Vivek V. Buwa. Dynamics of segregation and fluidization of binary mixtures in a cylindrical fluidized bed.

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Influence of Volatile Fatty Acids on Nitrite

2021-1-31  Intermediate nitrite accumulation during denitrification by Pseudomonas stutzeri isolated from a denitrifying fluidized bed reactor was examined in the presence of different volatile fatty acids. Nitrite accumulated when acetate or propionate served as the carbon and electron source but did not accumulate in the presence of butyrate, valerate, or caproate. Nitrite accumulation in the presence ...

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Influence of Volatile Fatty Acids on Nitrite

Intermediate nitrite accumulation during denitrification by Pseudomonas stutzeri isolated from a denitrifying fluidized bed reactor was examined in the presence of different volatile fatty acids. Nitrite accumulated when acetate or propionate served as the carbon and electron source but did not accumulate in the presence of butyrate, valerate ...

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杨海瑞-清华大学能源与动力工程系 - Tsinghua University

2021-5-7  Wang QG, Yin WD,Yang HR,Numerical study on the effect of fine coal accumulation in a coal beneficiation fluidized bedPOWDER TECHNOLOGY ,283,2015, 570-578 Wang QG, Yang HR, Numerical study of the effect of operation parameters on particle segregation in a coal beneficiation fluidized bed

Read More
... coal accumulation in a coal beneficiation fluidized bed ...

2015-6-9  One important phenomenon in coal beneficiation fluidized bed (CBFB) is the accumulation of fine coal particles in beneficiation due to poor screening efficiency and attrition of coal samples. The effect of fine coal accumulation is numerically studied in ...

Read More
Numerical study on the effect of fine coal

One important phenomenon in coal beneficiation fluidized bed (CBFB) is the accumulation of fine coal particles in beneficiation due to poor screening efficiency and attrition of coal samples. The effect of fine coal accumulation is numerically studied in this work using a TFM–DEM hybrid model. The gas phase and medium solid phase are modeled by []

Read More
Numerical study on the effect of fine coal

Numerical study on the effect of fine coal accumulation in a coal beneficiation fluidized bed [2015] Wang, Qinggong; Yin, Weidi; Yang, Hairui; Lu, Junfu; et al.

Read More
Experimental on nitrite accumulation in biological fluidized bed

Nitrite accumulation during nitrification in biofilm in down-flow biological fluldized bed reactor was studied.The results showed that at the beginning of operation after inoculation, there was nitrite accumulation, but ammonia-N removal rate was still up to 97%.Wth ...

Read More
Computational fluid dynamic modeling of fluidized

2012-1-1  Electrostatic charges in gas phase polymerization fluidized bed reactors are known to influence the bed hydrodynamics, particle elutriation, bubble size, bubble shape etc. Accumulation of electrostatic charges in the fluidized-bed can lead to operational issues.

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Liquid-fluidized-bed heat exchanger design

Liquid-fluidized-bed heat exchangers prevent scale accumulation on heat transfer surfaces and reduce the required heat transfer surface when scaling fluids, such as geothermal water, are used as the primary or working fluid. Liquid-fluidized-bed heat exchangers,

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Particulate and gaseous emissions during fluidized

Particulate and gaseous emissions during fluidized bed combustion of semi-dried sewage sludge: effect of bed ash accumulation on NOx formation. Cammarota A(1), Chirone R, Salatino P, Solimene R, Urciuolo M. Author information: (1)Istituto di Ricerche sulla Combustione - CNR, P.le V. Tecchio 80, 80125 Napoli, Italy. [email protected]

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Experimental on nitrite accumulation in biological ...

Nitrite accumulation during nitrification in biofilm in down-flow biological fluldized bed reactor was studied.The results showed that at the beginning of operation after inoculation, there was nitrite accumulation, but ammonia-N removal rate was still up to 97%.Wth nitrobacteria acclimating and proliferating, nitrifying product was mainly nitrate.When ammonia-N concentration in influent was ...

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Accumulation of Metabolic Intermediates during

Groundwater containing benzene, toluene, and p-xylene (BTX) was treated in fluidized bed reactors using nonactivated carbon (FBR) and activated carbon (BAC-FBR) as the biofilm carriers. BTX removal...

Read More
杨海瑞-清华大学能源与动力工程系 - Tsinghua University

2021-5-7  Wang QG, Yin WD,Yang HR,Numerical study on the effect of fine coal accumulation in a coal beneficiation fluidized bedPOWDER TECHNOLOGY ,283,2015, 570-578 Wang QG, Yang HR, Numerical study of the effect of operation parameters on particle segregation in a coal beneficiation fluidized bed

Read More