Pressurized pneumatic conveying of pulverized fuels for entrained flow gasification

Kus, Francis; Duchesne, Marc; Champagne, Scott; Hughes, Robin W.; Lu, Dennis Y.; Macchi, Arturo; Mehrani, Poupak

doi:10.1016/j.powtec.2015.10.028

Cited by 21 publications

(17 citation statements)

References 12 publications

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“…A pressurized gasification pilot plant, discussed in previous work [24], was used to conduct a jet geometry analysis on a high pressure non-reactive pneumatic conveying system, using the solid injector design shown in Figure 2. The solid injector consists of a center tube (internal diameter = 6.2 mm) that conveys a mixture of solids and carrier gas into the reactor, and a series of eight impinging jets (ID = 2.5 mm), injecting gas at an angle of 37 • , to mix an impinging gas into the solid-gas jet.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…For non-reactive conditions, nitrogen is used as carrier, impinging and sleeve gas. The pulverized solid used in the study is petroleum coke (particle harmonic mean size from a mass distribution of 10 μm, density of 1176 kg/m 3 ) [24]. The jet geometry imaging was done using a Phantom v9.1 camera (Vision Research, Wayne, NJ, United States), with an image capture frequency of 10 Hz and a resolution of 1632 × 1200 pixels, and a Nano L Nd:YAG laser (Litron Lasers, Warwickshire, England) producing a laser sheet with a thickness of 5 mm on which the images were captured.…”

Section: Methodsmentioning

confidence: 99%

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Dry Fuel Jet Half-Angle Measurements and Correlation for an Entrained Flow Gasifier

et al. 2018

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Reduced order models (ROMs) are increasingly applied to entrained flow gasification development due to reduced computational requirements relative to computational fluid dynamics (CFD) models. However, they require greater a posteriori knowledge of the reactor physics. A significant parameter influencing ROM outputs is the jet half-angle of the solid fuel and oxidant mixture in the gasifier. Thus, it is important to understand the geometry of the jet in the gasifier, and how it is dependent on operating parameters, such as solid and carrier gas flow rates. In this work, an existing model for jet half-angles, which considers the ratio of surrounding gas density to jet core density, is extended to a dry solids jet with impinging gas. The model is fitted to experimental jet half-angles. The jet half-angle of a non-reactive flow was measured using laser-sheet imaging for solid fluxes in the range of 460–880 kg/m2·s and carrier gas fluxes in the range of 43–90 kg/m2·s at the transport line outlet. Jet half-angles ranged from 5.6° to 11.3°, increasing with lower solid/gas loading ratios. CFD simulations of two reactive conditions, with solid and gas fluxes similar to experiments, were used to test the applicability of the proposed jet half-angle model.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Dry Fuel Jet Half-Angle Measurements and Correlation for an Entrained Flow Gasifier

et al. 2018

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“…[1,2,3,4] The conveying systems are capable of transporting almost any kind of material. In practice, the conveying distance of the single stage of the system can reach 1.5 km for most applications.…”

Section: Introductionmentioning

confidence: 99%

“…The ill-posedness of the Eulerian method was investigated by predicting the particle trajectory crossing flow of inertial particle transportation. [23 ] However, the velocity-based quadrature-based method of moment 4 (QMOM) proposed by Fox [24] offered an Eulerian method to predict particle disperse flows with multiple velocity fields. This quadrature-based third-order moment method (QMOM) models the kinetic momentum transfer of the particles based on the kinetic theory of gases [25], associated with the Gaussian quadrature method [ 26] by approximating the moments of velocity distribution,…”

Section: Introductionmentioning

confidence: 99%

Simulation of inertial behavior of dilute particle flow in horizontal channel with Eulerian method of velocity-reassociated quadrature-based method of moments

2016

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Investigation of wet coal flow characteristics in silos by experiments and simulations

Yuan

Guan

et al. 2021

Asia-Pacific J Chem Eng

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The investigation of the wet coal flow characteristics is carried out in a three‐dimensional silo system by experiments and simulations. The effect of the moisture content on the flow characteristics is firstly investigated by experiments, which is in terms of bulk density, angle of repose, and flow rate at outlet. When moisture content is below 9%, the coal particles act as the easy flow mode. When moisture content exceeds 9.8%, the flow pattern turns to be cohesive. For the further understanding of the influence of the moisture content, we develop the continuum method with the effect of moisture content being considered in the mathematic model. The simulation results of the discharge rate and the ash content at outlet have good agreements with a maximum deviation of 7.3%. It is found that the Mixing Index decreases with the moisture content increasing because the moisture strengthens mixing among particles. And the velocity difference between particles in the central axis and ones near the wall grows accordingly. Particles with higher moisture content are easier to get the funnel flow mode. For particles with good flowability, the mass flow mode appears in the silo.

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Pressurized pneumatic conveying of pulverized fuels for entrained flow gasification

Cited by 21 publications

References 12 publications

Dry Fuel Jet Half-Angle Measurements and Correlation for an Entrained Flow Gasifier

Dry Fuel Jet Half-Angle Measurements and Correlation for an Entrained Flow Gasifier

Simulation of inertial behavior of dilute particle flow in horizontal channel with Eulerian method of velocity-reassociated quadrature-based method of moments

Investigation of wet coal flow characteristics in silos by experiments and simulations

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