Study on a Photovoltaic Lunar Dust Removal System Based on the Photovoltaic Effect of PLZT

The deposition of lunar dust on the surface of solar panels and optical elements is one of the most important problems need to be solved in lunar exploration. This paper will propose an initiative lunar dust removal system based on the photovoltaic effect of PbLaZrTi (PLZT), which is activated by the ultraviolet light extracted from sun light at the lunar surface. When ultraviolet light with a wavelength near 365nm illuminates on polarized PLZT materials, high voltages of several kilovolt per centimeter can be generated between two electrodes of PLZT. When two electrodes of PLZT are connected to a lunar dust collector (LDC) and the ITO film of protected surface respectively, an electrostatic field forms between LDC and the protected surface. Coulomb forces over particles will overcome gravitational force and surface forces, so the particles can be absorbed to LDC and removed by LDC finally. Based on the equivalent electrical model, mathematical model of electrostatic force is derived when the lunar removal electric field is acted either by single piece PLZT or by multi-pieces PLZT which are connected in parallel. Experimental platform is set up to prove the feasibility of this lunar dust removal system. In order to improve the removal efficiency, a novel configuration design of LDC based on multi-PLZT patched is proposed and its removal efficiency is evaluated by experiments.

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Experimental study on production and emission characteristics of PM2.5 from industrial fluidized bed boilers

Thermal Science ◽

10.2298/tsci190828001z ◽

2020 ◽

Vol 24 (5 Part A) ◽

pp. 2665-2675

Author(s):

Songsong Zhang ◽

Qian Du ◽

Guoli Qi

Keyword(s):

Fluidized Bed ◽

Removal Efficiency ◽

Mass Concentration ◽

Great Influence ◽

Chemical Properties ◽

Dust Removal ◽

Dust Collector ◽

Bag Filter ◽

Physical And Chemical ◽

Fluidized Bed Boilers

Particle size distributions, concentrations, morphological characteristics, and elemental compositions of eight fluidized bed boilers with different capacities and different dust collectors were determined experimentally. The PM2.5 particle concentration and mass concentration were monitored in real-time before and after the boiler dust collector by electric low pressure impactor, and the physical and chemical properties of PM2.5 were analyzed by membrane sampling. We found that the PM2.5 particle concentration produced by industrial fluidized bed boilers displayed bimodal distributions, peaking at 0.2 ?m and 0.76 ?m, the formed mechanism of these two parts particles is vaporization-condensation of mineral matter and residual ash particles and the adsorbent wear or tear. Mass concentration exhibits a single peak characteristic with a peak at 0.12 ?m. The removal efficiency for PM2.5 of dust collectors varies with different dust removal mechanisms. The electrostatic precipitator and bag filter have high dust removal efficiency, and the water film dust collector has low dust removal efficiency. The normal operation of the bag filter has a great influence on the dust removal efficiency. The physical and chemical properties of PM2.5 showed that the single-particle morphology was mainly composed of irregular particles, containing a small amount of solid spherical particles and more agglomerates. The content of Si and Al in PM2.5 elemental analysis is the highest, which decreases after a dust collector. Some fluidized bed boilers use desulfurization in the furnace, which has great influence on the mass concentration of Ca and S elements, and the lowest Hg content in trace elements, about a few ppm. This article has been corrected. Link to the correction <a href="http://dx.doi.org/10.2298/TSCI200901242E">10.2298/TSCI200901242E</a>

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Design and Optimum of Dust Collector with Corrugated Plate for Underground Mine

Advances in Civil Engineering ◽

10.1155/2018/4368267 ◽

2018 ◽

Vol 2018 ◽

pp. 1-5

Author(s):

Ming Li ◽

Chao Wu ◽

Zhi-yong Zhou ◽

Wei-chun Lian ◽

Zhi-xiong Chen

Keyword(s):

Removal Efficiency ◽

Three Dimensional ◽

Surface Characteristics ◽

Dust Removal ◽

Dust Collector ◽

Dust Collection ◽

Ansys Fluent ◽

Metal Mine ◽

Lead Zinc ◽

Dimensional Simulation

A set of dust collectors was designed with corrugated plate for an underground metal mine, which has low ventilation resistance, simple maintenance, and strong environmental adaptability. A three-dimensional simulation model was built based on ANSYS-Fluent software, and it was used to analyze the influence law of key parameters on the comprehensive dust removal efficiency; the angle of corrugated plate to the horizontal plane, the surface characteristics of plate, pressure loss and dust removal efficiency were discussed. The optimal design scheme of the dust collector was determined according to the simulation results. The dust collection was carried out in the Fankou lead-zinc underground metal mine in China, and the total dust removal efficiency was more than 95%, and for respiratory dust, it was more than 85%. This dust collector can be widely used in similar underground metal mines.

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Study of integrated vortex ventilation and dust removal system in mechanized excavation face

Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering ◽

10.1177/0954408920936795 ◽

2020 ◽

pp. 095440892093679

Author(s):

Xiaofei Liu ◽

Jifa Qian ◽

Enyuan Wang ◽

Zhenguo Zhang

Keyword(s):

Numerical Simulation ◽

Field Experiments ◽

Dust Control ◽

Dust Removal ◽

Mine Safety ◽

Respirable Dust ◽

Dust Collector ◽

Mining Operations ◽

Swirling Jet ◽

Removal System

The aerosolized dust produced during coal mining operations pollutes underground air environment and increases the risk of lung diseases in coal miners, such as pneumoconiosis. Aiming to solve the dust pollution in mechanized excavation face, the integrated vortex ventilation and dust removal system is designed based on swirling jet flow theory. The design principles and technological parameters of the major components of integrated vortex ventilation and dust removal (IVVDR) system, namely vortex ventilation device and wet dust collector are described systematically. Through numerical simulation and field experiments, the dust control and dust removal effects of IVVDR system were analyzed and tested. The numerical simulation results show that the swirling jet flows produced by wall-attached duct can control most of total and respirable dust in the area between working face and exhausting air outlet. In addition, the IVVDR system provides better control and removal effect of smaller respirable dust. In field application, the IVVDR system has better performance compared with the long-compression short-suction (LCSS) ventilation. In conclusion, the concentration of total and respirable dust in purified air are below 10 mg/m3, and in accordance with the mine safety regulations.

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Analysis of influence factors on dust removal efficiency for novel photovoltaic lunar dust removal technology

Smart Materials and Structures ◽

10.1088/1361-665x/aa975b ◽

2017 ◽

Vol 26 (12) ◽

pp. 125025 ◽

Cited By ~ 4

Author(s):

Jing Jiang ◽

Hongyue Zhao ◽

Lei Wang ◽

Honghao Yue ◽

Xuyan Hou

Keyword(s):

Removal Efficiency ◽

Influence Factors ◽

Dust Removal ◽

Lunar Dust ◽

Removal Technology

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STUDY ON EXPERIMENTAL MODEL TO DETERMINE THE EFFICIENCY OF DUST REMOVAL EQUIPMENT FOR MECHANIC WORKSHOP

Science and Technology Development Journal ◽

10.32508/stdj.v13i3.2144 ◽

2010 ◽

Vol 13 (3) ◽

pp. 67-75

Author(s):

Thang Xuan Dinh ◽

Trung Thanh Nguyen

Keyword(s):

Removal Efficiency ◽

Research Result ◽

Suitable Method ◽

Dust Removal ◽

Small Scale ◽

Dust Collector ◽

Particle Removal ◽

Wet Scrubber ◽

Cleaning Methods ◽

Removal Technique

Finding suitable method for selecting the most suitable dust collector for manufacturers is a very important practise which help to reduce environmental pollution and develop a stable society. Based on available research results, the article studies the efficiency of dust removal technique for medium and small scale workshops on three equipments: wet scrubber, wet packed scrubber and centriscrub to suggest suitable dust treatment process in factories as well as the present need. The research result on three equipments suggest that the wet packed scrubber has a minimum particle removal efficiency of 92,67% while the wet scrubber achieving removal efficiency of 81,85% and the Centriscrub achieving removal efficiency up to 99,50%. The results show that the wet cleaning methods is the most suitable method for safe and efficient collection of dusts from various metal working applications such as deburring, polishing and grinding workshop in which the centriscrub achieves the highest efficiency.

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Human Exploration of the Moon: Multi-stage lunar Dust Removal System

41st International Conference on Environmental Systems ◽

10.2514/6.2011-5228 ◽

2011 ◽

Author(s):

Maurizio Belluco ◽

Roberto Destefanis ◽

Barbara Bonelli ◽

Paolo Maggiore ◽

Erika Manis ◽

...

Keyword(s):

Dust Removal ◽

The Moon ◽

Lunar Dust ◽

Multi Stage ◽

Human Exploration ◽

Removal System

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Efficiency characteristic of electrostatic dust precipitation using solar energy

Thermal Science ◽

10.2298/tsci191012098x ◽

2020 ◽

Vol 24 (5 Part A) ◽

pp. 2857-2864

Author(s):

Lin Xu ◽

Haoyuan Shi ◽

Lu Wang ◽

Wenjing Xiao ◽

Qiong Li ◽

...

Keyword(s):

Removal Efficiency ◽

Electrostatic Precipitator ◽

Great Influence ◽

Dust Removal ◽

Dust Collector ◽

Solar Photovoltaic ◽

Electrode Structure ◽

Cloudy Weather ◽

Removal Technology ◽

Dust Precipitator

In this paper, solar photovoltaic technology and electrostatic dust removal technology are combined to design a solar electrostatic precipitator, and its operation effect and dust removal performance are studied. Starting from optimizing the structure of the dust precipitator, the electrode structure of the dust precipitator was improved, the area of dust collector per unit volume was increased, and the dust removal efficiency was improved. By changing different working conditions, different solubility, different voltage, and different dust removal efficiency. Finally, compared the dust removal efficiency of the finned tubular and snowflake dust precipitator. The results show that the snowflake dust precipitator works stably in sunny and cloudy weather, and the dust removal effect is the highest, followed by dry powder, and the cement dust removal effect is the worst. It is determined that the change of voltage within the set range has little influence on the dust removal efficiency, and the dust concentration has a great influence on the dust removal efficiency.

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