Thermal analysis of a fluidized bed drying process for crops. Part II: Experimental results and model verification

Hajidavalloo, Ebrahim; Hamdullahpur, Feridun

doi:10.1002/1099-114x(200007)24:9<809::aid-er626>3.0.co;2-m

Cited by 19 publications

(2 citation statements)

References 4 publications

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“…A comparison of the energy efficiency values shown in Tables and with those corresponding to other gas-contact regimes is evidence of an excellent performance of the conical spouted bed for dying granular materials. Thus, Özahi and Demir used experimental data from other authors who carried out batch drying of corn , and wheat grain in fluidized beds and reported values of energy efficiency below 90% at the beginning of the operation, with a sharp decrease as the process went on and the normalized moisture content decreased. Furthermore, the efficiency of commercial equipment available for the continuous drying of granular materials ranges from 63% for rotary dryers, in which conduction is the main heat transfer mechanism, to 75% for convective dryers and 82% for fluidized bed dryers.…”

Section: Resultsmentioning

confidence: 99%

Effect of the Solid Inlet Design on the Continuous Drying of Fine and Ultrafine Sand in a Fountain Confined Conical Spouted Bed

Sukunza

Pablos

Vicente

et al. 2020

Ind. Eng. Chem. Res.

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The effect that the solid inlet design has on the continuous drying of sand in a conical spouted bed has been studied. Five designs have been tried, four of which are feeding the solid from the top and the fifth one into the spout. Three internal devices have been tested, a draft tube, fountain confiner, and new solid driver, to drive the solid to the fountain periphery. A hydrodynamic study has been conducted using beds of dry particles to delimit stable systems, which have been used for the drying of sands of two different size ranges. The more efficient operation is attained by distributing the bed onto the annulus or by feeding the solid into the downward section in the fountain periphery. These configurations allow attaining high efficiencies, with the product moisture content being well below specifications and the bed temperature being close to the adiabatic saturation temperature.

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Section: Resultsmentioning

confidence: 99%

Effect of the Solid Inlet Design on the Continuous Drying of Fine and Ultrafine Sand in a Fountain Confined Conical Spouted Bed

Sukunza

Pablos

Vicente

et al. 2020

Ind. Eng. Chem. Res.

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“…The moisture content of the biomass will be always high so it has to be dried before combustion .There are two types of dryer are there in the market for drying of biomass mechanical dryer and thermal dryer . Fluidized bed dryer can be used for drying of biomass as it has many advantages over other dryers was listed by Hajidawallo (2000). Demirabs (2004) defined the rate of co-firing as amount of biomass co-fired with coal.…”

Section: Introductionmentioning

confidence: 99%

Co-Combustion Analysis of Lignite Coal and Groundnut Shell using TGA

2018

JAFM

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The technology of co-firing was used to study the combustion of groundnut shell and coal at three different ratio of biomass (10%, 20%, and 30% in weight) and combustion of miscanthus and coal at three different ratio of biomass(10%,20%,30%) using thermo gravimetric analysis (TGA). When compared to firing of coal, the co-firing of coal and biomass (groundnut shell, miscanthus) has shown a good combustion result. The ignition temperature (Ti) burnout temperature (Tf) is reduced in the co-combustion when compared to the combustion of coal alone. The best blend ratio of coal/groundnut shell is 80%/20%. The best blend ratio of coal/miscanthus is 70%/30%.

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Dynamic Model Analysis of Batch Fluidized Bed Dryers

Duncan

2008

Part & Part Syst Charact

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In this work, a lumped mechanistic model has been developed to describe the heat and mass transfer between solid, gas and bubble phases in a batch fluidized bed dryer. To minimize the computational load, an approximation of the bubble temperature has been made in the model and it is shown that this does not significantly reduce the accuracy of the model. Model parameter sensitivity analysis has indicated that the performance characteristics of a bath fluidized bed dryer are affected not only by the inlet gas superficial velocity and temperature, but also by the features of particle and bubble phases, in particular, the particle and bubble sizes. Experimental validation shows that the proposed lumped dynamic model can be used to predict the particle moisture content and temperature profiles during the drying process in a fluidized bed dryer.

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Thermal analysis of a fluidized bed drying process for crops. Part II: Experimental results and model verification

Cited by 19 publications

References 4 publications

Effect of the Solid Inlet Design on the Continuous Drying of Fine and Ultrafine Sand in a Fountain Confined Conical Spouted Bed

Effect of the Solid Inlet Design on the Continuous Drying of Fine and Ultrafine Sand in a Fountain Confined Conical Spouted Bed

Co-Combustion Analysis of Lignite Coal and Groundnut Shell using TGA

Dynamic Model Analysis of Batch Fluidized Bed Dryers

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