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

IF 4.1 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology Pub Date : 2023-09-30 DOI:10.1016/j.partic.2023.09.009

Jie Feng , Mingfeng Lu , Kaige Wang , Kun Luo , Mingzhou Yu , Guangxue Zhang , Jiangrong Xu , Shuping Pan , Hailin Gu

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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.

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基于电声耦合凝聚技术的烟气颗粒快速消除研究

火灾烟雾由大量细颗粒组成，被认为是火灾的致命因素。本研究提出了一种基于电声耦合凝聚技术的快速烟气颗粒去除方法。首先，实验结果表明，与单场相比，电声耦合凝聚具有更高的除烟效率。在单声或电场作用30s后，烟雾传播率远低于80%，而耦合场达到90%。然后，讨论了声学频率、声压级和电压对排烟特性的影响。研究发现，最佳声学频率为1.5kHz，而随着声压级和电压的增加，消除效率先增加后趋于稳定，声压级和压力的临界值分别为135dB和7kV。这表明存在三个变量的最佳组合。最后，通过对颗粒运动和团聚物微观形态的理论分析，分析了电声耦合下颗粒团聚的机理。该研究为快速消除火灾烟气颗粒提供了新的思路。

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来源期刊

Particuology 工程技术-材料科学：综合

CiteScore

6.70

自引率

2.90%

发文量

1730

审稿时长

32 days

期刊介绍： The word ‘particuology’ was coined to parallel the discipline for the science and technology of particles. Particuology is an interdisciplinary journal that publishes frontier research articles and critical reviews on the discovery, formulation and engineering of particulate materials, processes and systems. It especially welcomes contributions utilising advanced theoretical, modelling and measurement methods to enable the discovery and creation of new particulate materials, and the manufacturing of functional particulate-based products, such as sensors. Papers are handled by Thematic Editors who oversee contributions from specific subject fields. These fields are classified into: Particle Synthesis and Modification; Particle Characterization and Measurement; Granular Systems and Bulk Solids Technology; Fluidization and Particle-Fluid Systems; Aerosols; and Applications of Particle Technology. Key topics concerning the creation and processing of particulates include: -Modelling and simulation of particle formation, collective behaviour of particles and systems for particle production over a broad spectrum of length scales -Mining of experimental data for particle synthesis and surface properties to facilitate the creation of new materials and processes -Particle design and preparation including controlled response and sensing functionalities in formation, delivery systems and biological systems, etc. -Experimental and computational methods for visualization and analysis of particulate system. These topics are broadly relevant to the production of materials, pharmaceuticals and food, and to the conversion of energy resources to fuels and protection of the environment.