A CFD based comprehensive study of coal-fired updraft gasifier in ceramic industry

Manek, Bhargav; Javia, M.S.; Harichandan, Atal Bihari; Ramani, Hardik B.

doi:10.1016/j.tsep.2018.11.001

Cited by 13 publications

(5 citation statements)

References 43 publications

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“…It was found that the maximum temperature was increased with the increasing equivalent ratio. This was in good agreement with other updraft gasification configuration (Rowland 2010;Manek et al 2019). Visual observation was used to detect the ash, char, and biomass zones that developed in the reactor.…”

Section: Zone Developmentsupporting

confidence: 85%

A new method for zone development observation for updraft rice husk gasification

Onthong

Charoensuk

2019

BioRes

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Experiments were carried out with a new method for assessing an updraft gasification reactor. An attached side door enabled the investigation of zone development by stopping air supply at specific times, when the thickness of biomass, char, and ash layers were measured. Development in zone thicknesses of biomass, char, and ash with time associated with temperature distribution provided information about the speed of flame propagation inside the reactor. Initially, pyrolysis and volatile combustion occurred, as evidenced by the high mass loss rate and high growth rate of the char layer. Shrinkage in the char layer took place later, and this phenomenon was governed by char glowing, which was relatively slow in mass loss rate. Finally, the fully developed char layer was obtained. The results from four different air mass fluxes under updraft configuration were presented, showing the differences in layer development. Temperature profiles at each time step revealed that the location of peak temperature coincided with the location of ash-char interface for every air mass flux. This effect was due to the high energy release during the oxidation of fixed carbon.

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Section: Zone Developmentsupporting

confidence: 85%

A new method for zone development observation for updraft rice husk gasification

Onthong

Charoensuk

2019

BioRes

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“…Lu et al (2017) developed a two-dimensional non-stationary mathematical model to predict the C conversion and gas composition of an updraft fixed bed gasification process; the simulation result was consistent with experimental results [32]. Manek et al (2019) used the ANSYS Fluent software for an updraft gasifier, performed simulations to investigate the effect of air excess coefficients (0.24-0.36 on the gas production of the gasifier), and obtained the optimal air excess coefficient for the gasification reaction. Experimental data on the temperature distribution curve of the gasifier wall were compared with the numerical data, and the results were in good agreement [33].…”

Section: Introductionsupporting

confidence: 53%

“…Manek et al (2019) used the ANSYS Fluent software for an updraft gasifier, performed simulations to investigate the effect of air excess coefficients (0.24-0.36 on the gas production of the gasifier), and obtained the optimal air excess coefficient for the gasification reaction. Experimental data on the temperature distribution curve of the gasifier wall were compared with the numerical data, and the results were in good agreement [33].…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation and Experimental Study on a Thermal Energy Storage–Updraft Solid Waste Gasification Device

Sun

Wang

et al. 2023

Energies

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A thermal energy storage–updraft gasification device is a type of reactor that should be considered for use in solid waste gasification research that can save energy. However, the operating parameters and internal flow field during its operation remain unclear. In this study, a numerical model of the thermal energy storage–solid waste gasification device based on the computational fluid dynamics dense discrete phase model (CFD-DDPM) which had almost never been used before was established, and an innovative method that causes particles to be piled to simulate the gasification process was proposed according to the updraft fixed bed gasification characteristics; meanwhile, solid waste gasification experiments were conducted on the device. This study focused on the influence of moisture content and excess air coefficient on the gasification process of solid waste particles, and the velocity, pressure, temperature, and species distribution of the internal flow field of the device were analyzed. Simulation results showed that the higher the moisture content of particles, the greater the amplitude of changes in the internal physical field of the device. The fluid pressure drop is around 25 Pa–75 Pa for different working conditions. The combustible species of the gas of moist particles raise slightly with the increase in excess air coefficient, while the dry particles have the opposite effect. Compared with other gasification devices of the same type, the hydrogen production of this device is about 2–3 times higher. Our findings could facilitate the analysis, predict the operation status, and provide a theoretical basis for the improvement of this device.

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“…The units developed for small-and medium-scale applications typically operate at atmospheric pressure using air (instead of oxygen, used for the industrial-scale processes) and possibly steam as gasification agents. A number of theoretical studies on these kinds of processes are currently available in the scientific literature, mainly focused on the development of thermodynamic models (in particular by minimising Gibbs free energy) [22,23] or on computational fluid dynamics (CFD) process simulation [24,25], in some cases with the experimental model validation in pilot units [26,27]. Several studies are available on pilot-scale experimental development of the process for waste biomass gasification for power generation and biochar [7,28].…”

Section: Introductionmentioning

confidence: 99%

Syngas Production, Clean-Up and Wastewater Management in a Demo-Scale Fixed-Bed Updraft Biomass Gasification Unit

Calì¹,

Deiana

Bassano

et al. 2020

Energies

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This paper presents the experimental development at demonstration scale of an integrated gasification system fed with wood chips. The unit is based on a fixed-bed, updraft and air-blown gasifier—with a nominal capacity of 5 MWth—equipped with a wet scrubber for syngas clean-up and an integrated chemical and physical wastewater management system. Gasification performance, syngas composition and temperature profile are presented for the optimal operating conditions and with reference to two kinds of biomass used as primary fuels, i.e., stone pine and eucalyptus from local forests (combined heat and power generation from this kind of fuel represents a good opportunity to exploit distributed generation systems that can be part of a new energy paradigm in the framework of the circular economy). The gasification unit is characterised by a high efficiency (about 79–80%) and an operation stability during each test. Particular attention has been paid to the optimisation of an integrated double stage wastewater management system—which includes an oil skimmer and an activated carbon adsorption filter—designed to minimise both liquid residues and water make-up. The possibility to recycle part of the separated oil and used activated carbon to the gasifier has been also evaluated.

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A CFD based comprehensive study of coal-fired updraft gasifier in ceramic industry

Cited by 13 publications

References 43 publications

A new method for zone development observation for updraft rice husk gasification

A new method for zone development observation for updraft rice husk gasification

CFD Simulation and Experimental Study on a Thermal Energy Storage–Updraft Solid Waste Gasification Device

Syngas Production, Clean-Up and Wastewater Management in a Demo-Scale Fixed-Bed Updraft Biomass Gasification Unit

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