基于多场耦合提升逸散性颗粒与磁种碰撞系数动力学研究

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Abstract This paper focuses on enhancing the collision coefficient between fugitive particles and magnetic seeds through multi-field coupling. Based on the computational fluid dynamics-discrete phase model (DPM), a user-defined function(UDF) was used to include the effects of the Coulomb force and magnetic dipole force acting on the fugitive particles. The collision coefficient between the fugitive particles and magnetic seeds in the multi-field formed by the electric and magnetic fields was numerically calculated, and the dynamic mechanism of enhancing the magnetic agglomeration process of particles was obtained. Simulations reveal that, for a fluid velocity of 0.5m/s and particle diameters ranging from 0.5μm to 2.0μm, both Coulomb and magnetic dipole forces enhanced the collision coefficient between the particles and magnetic seeds. Furthermore, the Coulomb force compensated for the problem that the magnetic dipole force between the weakly magnetic particles and the magnetic seeds was small. When the electric field strength(E₀) was equal to 0.5kV/cm, the saturation magnetizationof fugitive particles(M_j) and magnetic seeds(M_i) were 500A/m and 40000A/m, respectively, the collision coefficient between fugitive particles and magnetic seeds was increased by 13.50% compared with that without charging. When the charge field strength(E₀) was equal to 1.0kV/cm, the collision coefficient was increased by 23.60%.

Key words： multi-field coupling fugitive particles magnetic seeds collision coefficient magnetic agglomeration

Received: 01 February 2024

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X513

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	ZHANG Li-An
	DU Chuan-Mei
	DIAO Yong-Fa
	SHEN Heng-Gen

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ZHANG Li-An,DU Chuan-Mei,DIAO Yong-Fa等. Dynamic study on enhancing the collision coefficient between fugitive particles and magnetic seeds based on multi-field coupling[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(9): 4874-4882.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I9/4874

[1] Vithanage M, Bandara P C, Novo L A B, et al. Deposition of trace metals associated with atmospheric particulate matter: Environmental fate and health risk assessment [J]. Chemosphere, 2022,303:135051.
[2] Wang Y H, Wen Z G, Cao X, et al. Environmental efficiency evaluation of China’s iron andsteel industry: A process-level data envelopment analysis [J]. Science of the Total Environment, 2020,707:135903.
[3] Zhang H X, Sun W Q, Li W D, et al. Physical and chemical characterization of fugitive particulate matter emissions of the iron and steel industry [J]. Atmospheric Pollution Research, 2022,13:101272.
[4] Zhu T Y, Wang X D, Yu Y, et al. Multi-process and multi-pollutant controltechnology for ultra-low emissions in the iron and steel industry [J]. Journal of Environmental Sciences, 2023,123:83-95.
[5] Zhao C, Pu W Y, Niu M Y, et al. Respiratory exposure to PM_2.5 soluble extract induced chronic lung injury by disturbing the phagocytosis function of macrophage [J]. Environmental Science and Pollution Research, 2022,29:13983-13997.
[6] 张俪安,刁永发,庄加玮,等.钢铁行业磁性纤维捕集非球形粉尘动力学研究[J]. 中国环境科学, 2020,40(4):1477-1485. Zhang L A, Diao Y F, Zhuang J W, et al. Study on the dynamic of non-spherical particles captured by magnetic fibers in steel industry [J]. China Environmental Science, 2020,40(4):1477-1485.
[7] Zhao L, Li X L, Sun W Q, et al. Experimental study on bag filtration enhanced by magnetic aggregation of fine particles from hot metal casting process [J]. Powder Technology, 2018,327:255-266.
[8] Wang Y H, Xue Z X, Zheng X Y, et al. Matching relation between matrix aspect ratio and applied magnetic induction for maximum particle capture in transversal high gradient magnetic separation [J]. Minerals Engineering, 2020,151:106316.
[9] Xue Z X, Wang Y H, Zheng X Y, et al. Particle capture of special cross-section matrices in axial high gradient magnetic separation: A 3D simulation [J]. Separation and Purification Technology, 2020,237:116375.
[10] Wang F W, Tang D D, Gao L K, et al. Dynamic capture and accumulation of multiple types of magnetic particles based on fully coupled multiphysics model in multiwire matrix for high-gradient magnetic separation [J]. Advanced Powder Technology, 2020,31(3): 1040-1050.
[11] Ku J G, Chen H H, He K, et al. Numerical simulation of agglomeration process dynamics of ferromagnetic mineral particles in a weak magnetic field [J]. International Journal of Mineral Processing, 2014, 133:46-51.
[12] Xu Z Q, Bo X Q, Wu H, et al. Numerical simulation of contact and separation of magnetic particles under uniform magnetic field [J]. Journal of Physics, D. Applied Physics, 2022,55:85001.
[13] Ke C H, Shu S, Zhang H, et al. LBM-IBM-DEM modelling of magnetic particles in a fluid [J]. Powder Technology, 2017,314:264-280.
[14] Karvelas E G, Lampropoulos N K, Benos L, et al. On the magnetic aggregation of Fe₃O₄ nanoparticles [J]. Computer Methods and Programs in Biomedicine, 2020,198:105778.
[15] 郭小飞,任伟杰,张洺睿,等.磨矿粒度对磁铁矿磁性特征及磁团聚的影响[J]. 中南大学学报(自然科学版), 2020,51(9):2373-2378. Guo X F, Ren W J, Zhang M R, et al. Effects of grinding fineness on magnetism and agglomeration of magnetite [J]. Journal of Central South University (Science and Technology), 2020,51(9):2373-2378.
[16] Xia J, Lei Z Y, Jiang K X, et al. Comparison of various forces acting on magnetic particles in a low-intensity magnetic field: A 3D FEA [J]. Powder Technology, 2022,401:117351.
[17] Zhao C S, Li Y W, Wu X, et al. Experimental investigation on aggregation of coal-fired PM₁₀ by magnetic seeding [J]. Chemical Engineering Journal, 2007,133(1):301-309.
[18] Lv C, Li G D, Shen R Q, et al. Study on electric agglomeration of bipolar-charged coal fired fly ash particles and its effect on filtration performance of fibrous filter [J]. Clean Technologies and Environmental Policy, 2023,25:1887-1901.
[19] Serantes D, Baldomir D. Nanoparticle size threshold for magnetic agglomeration and associated hyperthermia performance [J]. Nanomaterials, 2021,11(11):2786.
[20] Shi Y M, Fang M X, Wang Q H, et al. Enhanced high-temperature particle capture throughan electrostatic precipitator with assistant electrodes [J]. Separation and Purification Technology, 2023,324:124550.
[21] Zhang L A, Diao Y F, Chu M H, et al. Study on external magnetic field improving the capture of Fe-based fine particles by magnetic fibers with different arrangement structures [J]. Particulate Science and Technology, 2021,40(6):675-685.
[22] Dastoori K, Kolhe M, Mallard C, et al. Electrostatic precipitation in a small scale wood combustion furnace [J]. Journal of Electrostatics. 2011,69(5):466-472.
[23] 李永旺,赵长遂,吴新,等.燃煤可吸入颗粒物在磁场中凝并脱除机理[J]. 化工学报, 2007,58(4):987-993. Li Y W, Zhao C S, Wu X, et al. Aggregation mechanism of PM₁₀ from coal combustion in uniform magnetic field [J]. Journal of Chemical Industry and Engineering, 2007,58(4):987-993.
[24] Li W, Shen S N, Li H. Study and optimization of the filtration performance of multi-fiber filter [J]. Advanced Powder Technology, 27(2):638-645.
[25] Zhang L A, Diao Y F, Chu M H, et al. The influence of interaction between orthogonal magnetic fibers on the capture of Fe-based fine particles by each fiber [J]. Journal of Engineered Fibers and Fabrics, 2022,17:1-15.
[26] 贾中坚,刁永发,张俪安,等.驻极体磁纤维捕集荷电Fe基细颗粒数值模拟[J]. 中国环境科学, 2021,41(4):1540-1547. Jia Z J, Diao Y F, Zhang L A, et al. Numerical simulation of electret magnetic fiber in trapping charged Fe based fine particles [J]. China Environmental Science, 2021,41(4):1540-1547.
[27] 鲁端峰,吴新,赵长遂,等.燃煤可吸入颗粒物磁力聚并脱除特性的实验研究[J]. 动力工程, 2007,27(4):611-615. Lu D F, W X, Zhao C S, et al. Experimental study on aggregation and precipitation characteristics, with magnetic seeding, of inhalable particulates from coal combustion [J]. Journal of Power Engineering, 2007,27(4):611-615.
[28] Ran W E, Wong J B. Impaction of dust and smoke particles on surface and body collectors [J]. Industrial and Engineering Chemistry, 1952, 44(6):1371-1381.
[29] Walton W, Woolcoke A. The suppression of airborne dust by water spray [J]. International Jounal of Air Pollution, 1960,3:129-153.
[30] Schmidt M, Loffler F. Experimentalinvestigations on two-phase flow past a sphere using digital particle-image-Velocimetry [J]. Experiments in Fluids, 1993,14(5):296-304.
[31] Slinn W G N. some approximations for the wet and dry removal of particles and gases from the atmosphere [J]. Water, Air, and Soil Pollution, 1977,7(4):513-543.
[32] Choi H Y, Park Y G, Ha M Y. Numerical simulation of the wavy collecting plate effects on the performance of an electrostatic precipitator [J]. Powder Technology, 2021,382:232-243.