Numerical simulation of radiant syngas cooler with different connection to entrained-flow gasifier

Wang, Lei; Xu, Jianliang; Wei, Juntao; Guo, Qinghua; Gong, Yan; Yu, Guangsuo

doi:10.1016/j.applthermaleng.2021.117804

Cited by 5 publications

(2 citation statements)

References 37 publications

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“…The evaporation of alkali metals was introduced in the fuel particle combustion model in [255]. Models of the slag deposits formation on heat exchange surfaces considering the solid and molten ash particles interaction, make it possible to describe the decrease in heat transfer efficiency in boilers [256][257][258][259][260][261].…”

Section: Interfacial Interactionsmentioning

confidence: 99%

Particle Agglomeration of Biomass and Plastic Waste during Their Thermochemical Fixed-Bed Conversion

Donskoy

2023

Energies

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The article provides state-of-the-art research on agglomeration processes during fixed-bed combustion and gasification of low-grade fuels such as biomass and waste (primarily plastic-containing waste). Such fuels demonstrate complex thermal behaviour: their decomposition and combustion are multistage, accompanied by phase transitions, and may lead to fixed-bed mechanical instability and the non-uniformity of air distribution over the cross-section. To clarify the role of physicochemical factors (fuel composition and properties, reactor conditions), data from different sources are compared. The review shows that the fixed-bed agglomeration regimes can, in a rough approximation, be classified by the sintering mechanism (due to the melting of the mineral part or the organic part), with the following search for each mechanism realisation conditions by comparing the fuel properties and characteristic temperatures. Attempts to theoretically describe and numerically simulate the agglomeration phenomenon as a change in the structure of a reacting dispersed medium are also considered: the main directions in which such approaches can be developed are indicated.

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Section: Interfacial Interactionsmentioning

confidence: 99%

Particle Agglomeration of Biomass and Plastic Waste during Their Thermochemical Fixed-Bed Conversion

Donskoy

2023

Energies

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“…Qiu et al , reduced and modeled the forging plate and upper cone structure based on the industrial RSC, and they explained the reasons for the deterioration of heat transfer in the forging plate and upper cone structure while analyzing the thermal deformation phenomenon of the forging plate and upper cone structure. Wang et al designed and optimized the connection structure of the gasification chamber and the RSC, discussing the influence of different connection structures on the flow field. Li et al analyzed the flow, heat, and mass transfer processes in the RSC after adding a water injection system, and the modified RSC improved the reliability of the gasification system.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Integral Thermal Deformation Behavior of a Radiant Syngas Cooler for an Entrained-Flow Gasifier

Zhang,

Xu,

Gong

et al. 2023

Ind. Eng. Chem. Res.

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A radiant syngas cooler (RSC) is an important device in the heat recovery type of entrained-flow gasifier that can effectively improve the energy utilization efficiency. In this work, a three-dimensional (3D) industrial RSC model is established. Heat transfer characteristics and integral thermal deformation behavior are studied by numerical simulation, combining the principle of fluid–structure coupling to explore the variation of integral thermal deformation under different operating conditions. The simulation results indicate that the setting of the radiation screen has different effects on the uneven heating of the membrane wall in the circumferential direction, varying with heights. An equivalent stress concentration area in the middle and upper parts under industrial constraints is shown on the cylinder membrane wall. The equivalent stress of the upper cone membrane wall surface exceeds the allowable stress of the material. The thermal deformation of the top sealing structure and the bottom is 45.6 mm and 64.5 mm, respectively. The upward movement of the fixed support reduces the thermal deformation of the top sealing structure while increasing the thermal deformation of the bottom. An increase in the inlet temperature causes an increase in the thermal deformation of the top sealing structure and the equivalent stress at the middle and upper parts of the cylinder membrane wall while having an insignificant impact on the thermal deformation of the bottom. The deposition of ash and slag reduces the thermal deformation of the top sealing structure and the total heat transfer rate of the cylinder membrane wall. With a slight effect on the total thermal deformation, increasing the slag thickness decreases the total heat transfer rate.

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Numerical study on the effects of homogeneous reactions on the composition distributions of syngas in radiant syngas cooler

Wang

Qiu

Guo

et al. 2022

Applied Thermal Engineering

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Numerical simulation of radiant syngas cooler with different connection to entrained-flow gasifier

Cited by 5 publications

References 37 publications

Particle Agglomeration of Biomass and Plastic Waste during Their Thermochemical Fixed-Bed Conversion

Particle Agglomeration of Biomass and Plastic Waste during Their Thermochemical Fixed-Bed Conversion

Numerical Simulation of the Integral Thermal Deformation Behavior of a Radiant Syngas Cooler for an Entrained-Flow Gasifier

Numerical study on the effects of homogeneous reactions on the composition distributions of syngas in radiant syngas cooler

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