Thermal erosion of WC-based cemented carbide nozzles by coal water slurry

Ding, Zeliang; Deng, Jianxin; Xiaohong, Zen; Jiping, Wu; Yongsheng, Zou

doi:10.1016/j.ijrmhm.2007.08.006

Cited by 9 publications

(1 citation statement)

References 14 publications

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“…As a rule, the area of the nozzle channel is exposed to this [15]. Its destruction occurs, accompanied by an increase in the diameter of the outlet nozzle [16]. The latter factor has a negative impact on the characteristics of the CWF spraying.…”

Section: Problems With the Combustion Of Cwfmentioning

confidence: 99%

Nozzles for Spraying Coal–Water Fuels

Gvozdyakov,

Zenkov

2023

Applied Sciences

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This work presents a review of modern devices for spraying coal–water fuels. The efficiency of their operation was analyzed according to several criteria: the simplicity of their design (A), the fuel channel’s predisposition to clogging (B), durability in terms of the erosive wear of the nozzle channel (C), and dispersion of the jet—the average size of droplets in the jet (D). It was established that, from the point of view of operational efficiency, the most preferred devices for spraying coal–water fuels are those with a quasi-internal mixing of fuel and spraying agents. In combination with refractory or ceramic materials and the large diameter of the fuel channel, its rapid erosion wear and the likelihood of clogging with large particles of coal or agglomerates of viscous coal–water fuel are excluded. At the same time, the possibility of forming a fine-dispersed jet remains. The cooling of the nozzle with an external mixing of fuel and spraying agents during its operation also reduces the rate of erosion wear. Narrowing the fuel channel was proven to be an undesirable solution when creating a coal–water fuel nozzle. This review will be useful for both researchers studying the processes of spraying coal–water fuels and designers involved in the creation of coal–water fuel injectors or the transfer of existing boilers to coal–water fuel.

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Section: Problems With the Combustion Of Cwfmentioning

confidence: 99%

Nozzles for Spraying Coal–Water Fuels

Gvozdyakov,

Zenkov

2023

Applied Sciences

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Spraying Characteristics of Alcohol‐Coal‐Water Slurries with Low Coal Content

et al. 2022

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The results of spraying characteristics of alcohol‐coal‐water slurries are presented. It has been experimentally proved that the lowest viscosity value of the studied slurries varies from 54 to 329 mPa s. The density value of alcohol‐coal‐water slurries decreases to 1130 kg m−3 when the content of isopropyl alcohol in the fuel composition is 8 wt %. The largest value of jet spraying angle corresponds to alcohol‐coal‐water fuel with an isopropyl alcohol content of 8 wt %. The number of sufficiently large droplets decreases in comparison with a typical two‐component coal‐water fuel. The calorific value of alcohol‐coal‐water slurries rises when the third liquid fuel component is introduced into the composition of coal‐water fuel.

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Investigating and removing the re-sticky debris on tungsten carbide in electrical discharge machining

Chou¹,

Wang²

2014

Int J Adv Manuf Technol

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Thermal erosion of WC-based cemented carbide nozzles by coal water slurry

Cited by 9 publications

References 14 publications

Nozzles for Spraying Coal–Water Fuels

Nozzles for Spraying Coal–Water Fuels

Spraying Characteristics of Alcohol‐Coal‐Water Slurries with Low Coal Content

Investigating and removing the re-sticky debris on tungsten carbide in electrical discharge machining

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