Study on the fast elimination of smoke particle based on electro-acoustic coupling agglomeration technology--颗粒学报PARTICUOLOGY

Feng, J., Lu, M., Wang, K., Luo, K., Yu, M., Zhang, G., . . . Gu, H. (2024). Study on the fast elimination of smoke particle based on electro-acoustic coupling agglomeration technology. Particuology, 88, 1-10. https://doi.org/10.1016/j.partic.2023.09.009

Study on the fast elimination of smoke particle based on electro-acoustic coupling agglomeration technology

Jie Feng ^a, Mingfeng Lu ^a, Kaige Wang ^c, Kun Luo ^b, Mingzhou Yu ^a, Guangxue Zhang ^a, Jiangrong Xu ^a, Shuping Pan ^d, Hailin Gu ^a *

a The Institute for Energy Engineering, China Jiliang University, Hangzhou, 310018, China
b State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China
c Qingshanhu Energy Research Center, Zhejiang University, Hangzhou, 310017, China
d Zhejiang Ecological Environment Monitoring Center, Hangzhou, 310012, China

10.1016/j.partic.2023.09.009

Volume 88, May 2024, Pages 1-10

Received 3 July 2023, Revised 23 August 2023, Accepted 13 September 2023, Available online 30 September 2023, Version of Record 26 October 2023.

E-mail: hlgu@cjlu.edu.cn

Highlights

• A new smoke particle elimination method is proposed using electro-acoustic coupling.

• Smoke transmittance increases to 90% in 15 s at a low sound pressure level.

• Optimal combination of the parameters exists for the electro-acoustic coupling field.

• Electro-acoustic coupling field promotes agglomeration of smoke particles.

Abstract

Fire smoke, which consists large amounts of fine particles, is considered as the fatal factor in fires. In this study, a fast smoke particle elimination method based on electro-acoustic coupling agglomeration technology is proposed. First, the experimental results show that the electro-acoustic coupling agglomeration has higher smoke elimination efficiency compared to single-field. The smoke transmission is much less than 80% after 30 s of single acoustic or electric field action, while the coupled field reaches 90%. Then, the effects of acoustic frequency, sound pressure level and voltage on the smoke elimination characteristics are discussed. It is found that the optimal acoustic frequency is 1.5 kHz. While as the sound pressure level and voltage increase, the elimination efficiency first increases and then tends to stabilize, the critical values of the sound pressure level and voltage are 135 dB and 7 kV. This indicates that there is an optimal combination of the three variables. Finally, through the theoretical analysis of particle movement and the micro-morphology of agglomerates, the particle agglomeration mechanism under the electro-acoustic coupling is analyzed. This study provides a new idea for the fast elimination of fire smoke particle.

Graphical abstract

Keywords

Smoke particle; Agglomeration; Electro-acoustic coupling; Smoke elimination

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