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RISS 인기검색어
- 검색키워드
- 저자 : Shuangcheng Fu (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Numerical study of fly ash deposition process in low temperature economizer under SCR conditions
Shuangcheng Fu,Gang Cao,Guofu Ou,Faqi Zhou,Luyu Li 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.7
After the boiler of a thermal power plant in Nanjing was reformed for denitrification, the clogging of flyash particles occurred near the support beam of the economizer. The critical speed criterion under different workingconditions was constructed by Fluent custom code (UDF), and the change of fly ash deposition on the support beamof the economizer was simulated without ABS and with ABS. At the same time, the influence of the fin layout structureon the movement of smoke and fly ash particles was analyzed. The results show that the stagnation of fly ash particleson the supporting beam is the main cause of sediment clogging. Due to the production of ABS in the process ofdenitrification, the adhesion of fly ash particles is intensified. At the same time, the fin structure on the support beamhinders the lateral movement of fly ash particles, which causes the growth of clogged fly ash near the support plate. Onthis basis, an optimization plan for the fin structure is proposed, which improves the flue gas flow conditions andavoids the occurrence of clogging and growth of fly ash.
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Influence of Glass-Lined V-Shaped Stirrers on Crystallization Properties
Fu Shuangcheng,Zhao Tianyi,Tao Lanlan,Chen Guofeng,Yang Dong,Tao Liang 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.6
In the crystallization process, the quality of crystal formation is signifi cantly aff ected by the stirring mechanism. Typically, the effi ciency of mixing is directly correlated with the rotational speed of the stirrer. Nevertheless, elevated stirring speeds can lead to the fragmentation of crystal nuclei, thereby exerting a detrimental infl uence on the overall crystallization quality. To address such issue, a glass-lined V-shaped stirrer with a better stirring eff ect under low-speed conditions was developed in the present study. Particular attention was paid to providing a better stirring eff ect under low-speed conditions. The computational fl uid dynamics (CFD) numerical simulation method was employed to conduct a comparative analysis of the fl ow fi eld distribution when subjected to the infl uence of a V-shaped stirrer in comparison with two frequently employed stirrers. The velocity fi eld, turbulence intensity, particle distribution and heat transfer rate were analyzed, and experimental measurements of the mixing time were conducted. The fi ndings from the present study reveal that when the stirring paddle was operated at a speed of 80 rpm, the V-shaped stirrer exhibited a larger circulation range compared with the other two stirrers. Further, the overall turbulence intensity in the fl ow fi eld was higher, ensuring a more homogeneous distribution of crystal nuclei. Additionally, the heat transfer rate was found to be signifi cantly faster, contributing to improved crystallization effi ciency and higher-quality crystallization products. The utilization of the glass-lined V-shaped stirrer off ers the advantage of improved mixing effi ciency in the crystallization process, while maintaining the crystal quality. This innovation has the potential to bring about a transformative shift in manufacturing processes and contribute to advancements in the fi eld of crystallization.
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