Hydrodynamic properties of a cold model of dual fluidized bed gasifier: A modeling and experimental investigation

Shrestha, Siddhartha; Ali, Brahim Si; Jan, Badrul Mohamed; Lim, Marcus; Sheikh, Khalid El

doi:10.1016/j.cherd.2016.04.002

Cited by 15 publications

(2 citation statements)

References 61 publications

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“…Riser outlet condition play vital role to examine the particle residence time. Some previous studies [38] justified that particle residence time also depends on riser outlet conditions such as inner and outer diameter, different postulated mixing zone. It has been observed that riser section pressure drop continuously increases with increasing of solid circulation rate.…”

Section: Particle Residence Timementioning

confidence: 97%

A Brief Review on Hydrodynamic Behaviour Analysis of Coal Gasification in a Circulating Fluidized Bed Gasifier

Dwivedi¹,

Karmakar²,

Pramanick³

et al. 2019

IJHT

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In this paper a brief review on hydrodynamic characteristic of coal gasification is presented. Firstly an introduction of hydrodynamics then parameters related to hydrodynamics is discussed. In the last several decades Coal gasification is an important method to use of coal resources. The hydrodynamic characteristics have an important role to design of Circulating fluidized bed gasifiers. Circulating fluidized bed (CFB) gasifiers widely use due to their high reaction rates and high thermal efficiency. The present study includes some hydrodynamics properties of coal gasification such as effect of pressure and temperature, solid hold up, solid circulation rate, gas-solid contact, particle residency time, coal feeding rate and coal feeding position. During the brief review on hydrodynamics characteristics of coal each section of CFBs such as riser, cyclone, stand-pipe and loop seal have been considered.

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Section: Particle Residence Timementioning

confidence: 97%

A Brief Review on Hydrodynamic Behaviour Analysis of Coal Gasification in a Circulating Fluidized Bed Gasifier

Dwivedi¹,

Karmakar²,

Pramanick³

et al. 2019

IJHT

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“…The semi-coke formed when the biomass was not fully gasified enters the riser together with an inert heat carrier (to provide the heat required in the gasification reaction, usually quartz sand), and burns mixed with the air in this zone. The heat was absorbed by the heat carrier, and the combustion products enter the subsequent device together with the flue gas through the separation device, and the heat carrier was separated by the separation device and enters into the gasification chamber again to provide heat for the gasification reaction of the biomass [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Study on the Circulating Flow Rate of Rice Husk-Quartz Sand Mixture Particles in a Dual-Circulating Fluidized Bed

Yang¹,

Liang²,

Chen³

et al. 2018

dtetr

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In order to more accurately simulate the flow characteristics of biomass particles in biomass gasification process, an experimental study was conducted on the circulating flow rate of rice husk-quartz sand mixture on a self-built dual circulating fluidized bed cold experimental system. The circulation flow rate increased with the increase of the gasification chamber wind speed (U a ), but the growth trend gradually slowed down. With the increase of the mass fraction of rice husk (X r ) in the mixed material, the circulating flow rate showed a decreasing trend under various operating conditions. The X r in the circulating material basically showed a decreasing trend, and increased with the increase of the wind speed of riser (U r ).The trend of increase in the lower wind speed interval was larger. After a certain wind speed value was reached, the increase trend of particles gradually became slower, and the circulating material mass fraction X r showed a decreasing trend, and the decreasing trend gradually increased; with the increase of the initial material mass (m int ),the flow rate of material circulation increased to a certain extent. The X r in the mixed material gradually increased. Under the conditions of the respective mass fraction of mixed material, the particle size of quartz sand(d p ) in the mixed material increased, the circulating flow rate of the particles gradually decreased, and the mass fraction of biomass in the riser decreased gradually.

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Mathematical Model of Design and Performance Evaluation of a 210 MW CFB Boiler for Indian Lignite

Kishore

Rao²,

Kumar

2020

Springer Proceedings in Energy

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Hydrodynamic properties of a cold model of dual fluidized bed gasifier: A modeling and experimental investigation

Cited by 15 publications

References 61 publications

A Brief Review on Hydrodynamic Behaviour Analysis of Coal Gasification in a Circulating Fluidized Bed Gasifier

A Brief Review on Hydrodynamic Behaviour Analysis of Coal Gasification in a Circulating Fluidized Bed Gasifier

Study on the Circulating Flow Rate of Rice Husk-Quartz Sand Mixture Particles in a Dual-Circulating Fluidized Bed

Mathematical Model of Design and Performance Evaluation of a 210 MW CFB Boiler for Indian Lignite

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