Numerical investigations on hydrothermal flame characteristics of water-cooled hydrothermal burner
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Yiran Geng
,
Fan Zhang
Abstract
Supercritical hydrothermal combustion, as a quick homogeneous oxidizing process, offers a promising treatment option for industrial wastewater. This paper established a computational fluid dynamics model of a water-cooled hydrothermal combustion burner to investigate the thermal flame characteristics. The effects of the fuel mass flow rate, fuel concentration, initial reactor temperature, reaction pressure, and oxidant temperature on the thermal combustion ignition were revealed. The results indicate that the fuel concentration (from 10 wt% to 60 wt%) and initial reactor temperature (from 623 to 773 K) had less effect on the ignition temperature. In contrast, the ignition temperature increases by 398 K with increasing fuel mass flow rate (from 24 kg h−1 to 1080 kg h−1). As the oxygen temperature increases (from 273 to 673 K), the ignition temperature gradually decreases to 573 K and then increases. An increase in reaction pressure can facilitate a decrease in ignition temperature to a certain extent, and the optimal reaction pressure is 25 MPa. This study provides a vital reference for a hydrothermal burner’s scale-up design and ignition operation.
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: Unassigned
Funding source: China Postdoctoral Science Foundation
Award Identifier / Grant number: Unassigned
Acknowledgments
This work was supported by the National Natural Science Foundation of China [51871179 and 22008190], and the China Postdoctoral Science Foundation [2022M722526].
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: None declared.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Artikel in diesem Heft
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- TiO2 P25 and Kronos vlp 7000 materials activated by simulated solar light for atrazine degradation
- Numerical investigations on hydrothermal flame characteristics of water-cooled hydrothermal burner
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- Preparation of bimodal mesoporous CoCe composite oxide for ethanol complete oxidation in air
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Artikel in diesem Heft
- Frontmatter
- Articles
- Methylene blue removal from aqueous solution using modified Met-SWCNT-Ag nanoparticles: optimization using RSM-CCD
- Leaching behavior of germanium presented in different phases from zinc oxide dust under atmospheric acid leaching conditions
- TiO2 P25 and Kronos vlp 7000 materials activated by simulated solar light for atrazine degradation
- Numerical investigations on hydrothermal flame characteristics of water-cooled hydrothermal burner
- Moving bed biofilm reactor combined with an activated carbon filter for biological nitrate removal
- Preparation of bimodal mesoporous CoCe composite oxide for ethanol complete oxidation in air
- Hydrocracking of hydrotreated light cycle oil for optimizing BTEX production: a simple kinetic model
- Hydrodynamic comparison of different geometries of square cross-section airlift bioreactor using computational fluid dynamics
- Influence of different influence parameters on mixing characteristics of silicon particles in cassette
