Opposed multi-burner gasification technology: Recent process of fundamental research and industrial application

Wang, Fuchen; Yu, Guangsuo; Liu, Haifeng; Li, Weifeng; Guo, Qinghua; Xu, Jianliang; Gong, Yan; Shen, Zhongjie

doi:10.1016/j.cjche.2021.07.007

Cited by 29 publications

(3 citation statements)

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“…It has attracted considerable attention in scientific research and the large operating load of a single gasifier. 2,3 The distinct characteristic of entrained-flow gasification is that it will produce a large amount of slag, which forms a slag layer of the gasifier, reducing the heat loss and helping to improve the efficiency of the entrained-flow gasifier. However, excessive accumulation of slag can cause the gasifier to clog, reducing the operating efficiency of the gasifier.…”

Section: Introductionmentioning

confidence: 99%

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Study of the Deposition Characteristics of Particles on the Slag Wall of a Gasifier

Bai

Song

Wei

et al. 2023

Ind. Eng. Chem. Res.

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In this work, the behavior of coal char particles adhering to the slag wall was studied. The effects of slag thickness and particle size on the restitution coefficient and probability of deposition were mainly discussed. In addition, the types of particle deposition were also classified. The results of exploring the effect of particle size on the coefficient of restitution show that the restitution coefficient of coal char particles hitting the slag wall surface has a complex dimensional effect, with a maximum and minimum coefficient of restitution occurring at the same particle size, a phenomenon referred to in this paper as the discrete effect. The minimum restitution coefficient greater than 0 is regarded as the critical restitution coefficient (ε f), and it is considered that particles with theoretical restitution coefficient higher than εf will bounce off the slag wall. With the particle diameter of 600 μm as the boundary, ε f first decreases and then increases. The maximum restitution coefficient increases with an increasing particle size of less than 600 μm and stays at a maximum value of 0.62 when the particle size is more than 600 μm. Moreover, the fragmentation of particles occurs at the particle size of 840–1600 μm. The discrete effect was also observed in the experimental data for the investigation of slag thickness, ε f increases with the increase of the slag thickness, and the maximum possible restitution coefficient does not change with the thickness of the slag. In addition, according to the statistics of the deposition probability, it is found that the smaller the particle size, the greater the deposition probability, the thicker the slag thickness, and the easier it is to deposit.

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Section: Introductionmentioning

confidence: 99%

“…It is widely used in chemical and energy production. It has attracted considerable attention in scientific research and the large operating load of a single gasifier. , …”

Section: Introductionmentioning

confidence: 99%

Study of the Deposition Characteristics of Particles on the Slag Wall of a Gasifier

Bai

Song

Wei

et al. 2023

Ind. Eng. Chem. Res.

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“…Alternatively, an entrained flow gasifier and conventional burner can handle only wellpre-treated coal or biomass slurry. In this respect the fuel should be well-pulverized, and the slurry should have good atomization characteristics [29,30]. On the other side, sludge needs to be dried and briquetted before being processed in fixed bed reactors [31].…”

Section: Introductionmentioning

confidence: 99%

Fluidized Bed Combustion and Gasification of Fossil and Renewable Slurry Fuels

Miccio

Raganati²,

Ammendola³

et al. 2021

Energies

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This article provides a comprehensive review of the state of the art and more recent developments of the thermochemical treatments of slurry fuels in fluidized beds (FB). The review focuses on FB combustion and gasification of slurry fuels based on coal, biomass, sludge, and wastes from industry, agriculture, and the civil sector. The investigations at research and industrial levels over the last decades are presented and discussed, highlighting the adopted technological solutions, the results in terms of feasibility and efficiency, and the perspectives of future development. The different behavior between bubbling and circulating beds was addressed, in particular the optimal choice depending on the process (combustion/gasification/pyrolysis) and fuel properties (e.g., water content). Fundamental studies on interactions between the slurry fuels and the hot bed materials are also reviewed. The cumulative trend of reviewed investigations over the last decades depicts the abandonment of coal-based mixtures used in large plants, and the growing interest in the use of biomass-based slurries for small size application. In this respect, the shift from coal to biomass opens new challenges because of the different properties of biomass (density, fibrous structure, spontaneous degradation, hydrophilic behavior, etc.). Biomass-based slurries circumvent problems posed by using solid dry biomass, particularly in handling, storing, and feeding. Although slurry fuels represent a narrow sector, the results of the research investigations and the experience gained with coal can be exploited to contribute to the achievement of a circular approach based on renewable resources in the near future.

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Introduction

Jena,

Vuthaluru

2024

Gasification Technology

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Opposed multi-burner gasification technology: Recent process of fundamental research and industrial application

Cited by 29 publications

References 60 publications

Study of the Deposition Characteristics of Particles on the Slag Wall of a Gasifier

Study of the Deposition Characteristics of Particles on the Slag Wall of a Gasifier

Fluidized Bed Combustion and Gasification of Fossil and Renewable Slurry Fuels

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