Electrostatic Dust Removal Research Articles

Study on the application of atomized corona discharge combined with screen electrode in dust collection

This paper presents the design of a novel atomized corona discharge coupled screen electrode dust collector, which integrates electrostatic capture and wet electrostatic dust removal technologies. The upper part of the dust collector features an atomized corona discharge electrode utilizing a threaded-wire hole design with uniform water distribution. This design effectively addresses the issue of electrode fatness that may arise from uneven distribution of the discharge electrode. In contrast, the lower part of the collector is equipped with four side-by-side silk screen electrodes, which serve to expand the dust collection area, facilitate secondary particle capture, and consequently enhance dust removal efficiency. The study delves into a detailed analysis of the impact of various parameters on discharge characteristics and dust removal efficiency, culminating in the identification of optimal parameters.

Solid–liquid–gas-like phase transition in electric field driven dense granular media

The polarization induced by an external electric field significantly influences the contact charge of particles. It can easily cause solid–liquid–gas-like phase transitions in dense granular media, which are the key factors leading to environmental and safety disasters such as sandstorms, volcanic eruptions, and spacecraft emergencies. In this letter, our investigation focused on a densely packed granular system with different thicknesses subjected to bottom excitation and an external electric field. Using the discrete element method (DEM), we proposed conditions for the first- and second-order phase transitions and revealed the mechanism of electrical signal transformation. We presented the physical characteristics of charge and polarization diffusion coefficients for charged particles, and introduced a theoretical Turing model to predict critical phase transitions. Additionally, this phase transition model was extended to the application of electrostatic dust removal, quantitatively predicting the relationship between dust removal efficiency, particle layer thickness, and electric field intensity.

Self-Powered Autonomous Electrostatic Dust Removal for Solar Panels by an Electret Generator.

Solar panels often suffer from dust accumulation, significantly reducing their output, especially in desert regions where many of the world's largest solar plants are located. Here, an autonomous dust removal system for solar panels, powered by a wind-driven rotary electret generator is proposed. The generator applies a high voltage between one solar panel's output electrode and an upper mesh electrode to generate a strong electrostatic field. It is discovered that dust particles on the insulative glass cover of the panel can be charged under the high electrical field, assisted by adsorbed water, even in low-humidity environments. The charged particles are subsequently repelled from the solar panel with the significant Coulomb force. Two panels covered with sand dust are cleaned in only 6.6min by a 15cm diameter rotary electret generator at 1.6ms-1 wind speed. Experimental results manifest that the system can work effectively in a wide range of environmental conditions, and doesn't impact the panel performance for long-term operation. This autonomous system, with its high dust removal efficiency, simplicity, and low cost, holds great potential in practical applications.

Efficiency Improvement and Market Value Analysis of Guide Vane Electrostatic Precipitators

Urbanization and industrialization accelerate, the issue of atmospheric environmental pollution has become increasingly severe, particularly the impact of indoor air quality on human health and well-being. This study introduces a novel guide vane electrostatic precipitator that significantly enhances dust removal efficiency through optimized airflow channels and electrostatic field design. Experimental data demonstrate that this device can effectively reduce PM2.5 concentrations, improving dust removal efficiency by approximately 10% compared to traditional electrostatic dust removal technologies. Applications in various scenarios, including hotels, dust workshops, and steel foundries, indicate that the device not only improves air quality, enhancing employee productivity and well-being, but also features low energy consumption and intelligent operation. Furthermore, it holds considerable potential market value, contributing to the promotion of green and low-carbon development objectives. This research provides a comprehensive analysis and evaluation of the structure, working principle, mechanism of efficiency improvement, practical application effects, and market value of the guide vane electrostatic precipitator, looking forward to its application prospects in the field of air purification.

Enhancing the capturing characteristics of charged droplets on submicron particles: An experimental and numerical investigation

Charged water mist dust removal, combined electrostatic dust removal and wet dust removal, has low energy consumption and high capturing efficiency. Particle motion laws under turbulent flow are investigated. The theoretical model of droplet capturing submicron particles is established, and the kinetic process of submicron particles is analyzed. Considering that the actual conditions of the droplet capturing process is a combination of multiple capturing mechanisms, to better fit the actual engineering cases, an experimental platform is built to study the particle capturing characteristics of droplet under different operating conditions. The motion and deposition behavior of submicron particles relative to single droplet are investigated using COMSOL simulations to reveal the influence laws of relevant parameters. The results show that: the higher the temperature difference, the stronger the charging field, the fewer the escaping particles, and the greater the particle deposition efficiency. The particle capturing efficiency under combined action increases 20% compared to temperature alone and increases 24% compared to electrostatics alone. Also, the particle deposition efficiency under combined action increases 30% to 40% compared to temperature alone and increases 10% to 20% compared to electrostatics alone. The deposition efficiency under combined action is higher than the sum, up to 89%.

A new electrostatic dust removal method using carbon nanotubes transparent conductive film for sustainable operation of solar photovoltaic panels

Electrostatic dust removal has the advantages of energy saving, high efficiency, and controllability, and has become the preferred dust removal solution for solar photovoltaic (PV) panels in recent years. This paper investigates a new electrostatic adsorption dust removal method for solar PV panels based on the electrostatic dust removal effect of carbon nanotubes (CNTs) transparent conductive films. In the sheet resistance range of 500–1×105 Ω/□, the electrostatic dust removal effect of CNTs transparent conductive films has little relationship with the film sheet resistance, and when the electric field strength in the dust removal area is 6 kV/cm, the final dust removal rate of different films can reach more than 98.6 %, and the power generation efficiency of the PV panels can reach 94–97 % of that of the ordinary PV panels in the surface clean state after dust removal. The influence of the environment on the dust removal effect is mainly reflected in the relative humidity. When the relative humidity of the dust removal environment is 70 %, it shows the optimal dust removal effect, and the electric field strength required for the dust particles to jump is the lowest, which is 2.46 kV/cm. The highest dust removal efficiency can be achieved by using a metal plate with a lower surface curvature of 1/9.08 cm−1, and the final dust removal rate can reach 98.92 %. The research results are of great significance for further developing electrostatic dust removal technology in the solar PV panel dust removal field.

Preparation and photoaging resistance of single-walled carbon nanotubes transparent conductive thin films for electrostatic dust removal of photovoltaic panels

A single-walled carbon nanotubes transparent conductive film for electrostatic dust removal of photovoltaic panels was prepared by a rod coating method and subjected to xenon lamp aging experiments at different irradiance (300 W/m2, 150 W/m2, 50 W/m2, 2000 h) to investigate the photoaging resistance of the film. After aging, the light transmittance decreased from 91.34% to a minimum of 90.39%, the sheet resistance increased from 0.325 * 105 Ω/□ to a maximum of 4.753 * 105 Ω/□, the surface energy decreased, and the adhesive strength of the film at an irradiance of 300 W/m2 decreased from a class 5B to a class 4B. The film was used as the surface material of photovoltaic panels and was subjected to electrostatic dust removal experiments, which showed that the final dust removal rate of different aging types of films was between 97.5% and 98.5%, the power generation efficiency of photovoltaic panels can reach 93.5%− 97.8% of that of ordinary photovoltaic panels in the dust-free state on the surface, and excellent application results are achieved. The results of the study are conducive to expanding the application scenarios of single-walled carbon nanotubes transparent conductive films from indoor or air-isolated areas to outdoor ones.

Enhancing Dust Removal Efficiency in Electrostatic Precipitators with Homogeneous Flow

This paper aims to improve the efficiency of uniform flow electrostatic collector. First, the principle of electrostatic dust removal technology, including electrostatic dust removal principle and an overview of uniform flow electrostatic dust collector. Then, methods to improve dust removal efficiency by analyzing the relationship between dust removal efficiency and operating parameters. These include electric field design optimization, dust removal plate optimization, and airflow distribution control. Then, the factors affecting the efficiency of dust removal are analyzed, including the particle characteristics and the gas characteristics. Finally, the electric field optimization design based on numerical simulation and the airflow distribution optimization design based on CFD simulation are presented. Through theoretical simulation and optimization design, the dust removal efficiency of uniform flow electrostatic dust collector can be improved and the dust removal effect can be further optimized.

Effect of charged spray evaporation of desulfurization wastewater on fine particle removal efficiency of electrostatic precipitator

The removal of fine particles from coal-fired power plants and the zero-discharge treatment of desulfurization wastewater (DW) from wet desulfurization are critical issues. In this study, we propose a charged droplet evaporation technology of DW for efficient electrostatic dust removal, aiming to achieve zero discharge of DW and effectively remove fine particles. We experimentally studied the effect of charged DW droplet evaporation on the dust removal efficiency of an electrostatic precipitator (ESP) and analyzed the internal mechanism. The results revealed that the removal efficiency of fine particles by ESP was affected by electrode voltage, atomization pressure, DW volume flow, and Cl− concentration. The main internal mechanisms that improved the removal efficiency of fine particles were agglomeration and pre-charging of the particles. Increasing the electrode voltage proved to be the most effective method in enhancing the removal efficiency of fine particles. Specifically, when the electrode voltage was increased from 0 to 12 kV, the removal efficiency of PM2.5 by ESP demonstrated an increase of greater 14 %. The removal efficiency in the penetrating window exhibited an increase of greater than 8 %. Furthermore, augmenting the atomization pressure and DW volume flow also contributed to the improvement in fine particle removal by ESP. In contrast, increasing the Cl− concentration had a detrimental effect on the removal process.

Electrostatic dust removal using adsorbed moisture-assisted charge induction for sustainable operation of solar panels.

Dust accumulation on solar panels is a major challenge, as it blocks a large portion of sunlight. Solar panels are therefore cleaned regularly using large quantities of pure water. Consumption of water for cleaning, especially in deserts, poses a substantial sustainability challenge. Here, we present a waterless approach for dust removal from solar panels using electrostatic induction. We find that dust particles, despite primarily consisting of insulating silica, can be electrostatically repelled from electrodes due to charge induction assisted by adsorbed moisture. We experimentally determine dust particle charge by conducting Stokes experiments under an electrostatic field. By considering electrostatic, van der Waals, and gravitational forces, we define the threshold electric potential for particle removal. We also demonstrate dust removal over a broad range of relative humidity, making our approach widely applicable. Last, we develop a lab-scale prototype and demonstrate up to 95% recovery of lost power output using our approach.

Design Optimization of Soft‐Contact Freestanding Rotary Triboelectric Nanogenerator for High‐Output Performance

AbstractThe soft‐contact freestanding rotary triboelectric nanogenerator (FR‐TENG), with the capabilities of high output performance and excellent efficiency, presents interesting applications in driven nonequilibrium plasma jets, mass spectrometry, electrospinning, and so on. For enhancing the output performance of FR‐TENG, detailed and in‐depth research focusing on the design method is discussed in this paper, mainly consisting of the following four parts: 1) design reasonable geometric structure, 2) select triboelectric layers, 3) choose a reasonable signal acquisition, and 4) investigate influencing factors. Benefiting from this four‐step systematic research, a modified FR‐TENG with better output performance is successfully constructed. A corresponding open‐circuit voltage density of 1.27 × 105 V m−2 is achieved, which is over twofold higher compared to the largest one among the previous similar articles. Therefore, the four‐step systematic research is demonstrated to remarkably enhance the output performance of the soft‐contact FR‐TENG. This work not only presents a modified FR‐TENG with ultrahigh voltage density that inhibits bacterial corrosion, enables high‐voltage electrostatic dust removal, and enables impressive current cathodic protection of marine pipelines and urban buried pipelines, but also can be regarded as guidance for the design of soft‐contact FR‐TENG.

Optical and electrical properties of 3D patterned hydrophobic thin film for integrated energy harvester

Solar cell is currently the most widely used micro-energy harvesting device in outdoor unattended system field due to high conversion efficiency. However, the photoelectric conversion efficiency of solar cells is easily affected by surface reflection, dust pollution and weather conditions. Meanwhile, the reported researches only alleviated the influence of some of these factors. Here, an integrated energy harvester with a multifunctional 3D patterned hydrophobic thin film was designed to maintain and improve the working performance of solar cells. In which, the patterned film serves as both a self-cleaning and an anti-reflection layer to enhance the performance of solar cell, also, it can accumulate charges based on triboelectric mechanism when raindrops hit its surface. Compared with the tempered glass coated solar cell, the power conversion efficiency of the patterned film coated solar cell can be increased by 1.45%. In addition, by reducing the van der Waals force between the dust and the film, enhancing the hydrophobicity of the surface and achieving electrostatic dust removal based on the friction mechanism, multi-effect self-cleaning effect can be achieved. Furthermore, while achieving the electrostatic dust removal, the patterned film can also collect raindrop energy as a beneficial supplement to solar cells in rainy days. Therefore, the introduction of multifunctional 3D patterned film with excellent optical and electrical properties provides a simple and low-cost technical strategy and a stronger guarantee for the high efficiency and wide application of solar cells. • The 3D patterned film serves as both a self-cleaning and anti-reflection layer of solar cell and a friction layer of TENG. • The 3D patterned hydrophobic film can achieve multi-effect self-cleaning effect. • The 3D patterned film can effectively improve the light trapping and anti-reflection performance of solar cells. • While facilitating raindrops to remove dust through electrostatic action,the 3D patterned film can collect raindrop energy.

Research Status of Dust Reduction Technology in Coal Handling System of Thermal Power Plant

Aiming at the dust control of coal handling system in thermal power plant, the research status of dust reduction related theory and technology was summarized. This paper introduced the research progress of dust and air separation mechanism and multiphase flow simulation technology in dust removal and suppression, as well as the features and application of dust removal technologies such as wet dust suppression, bag type dust removal, high voltage electrostatic dust removal, unpowered dust reduction and others. The technical route of dust reduction in coal handling system of thermal power plant was advised, which provides reference for dust control in coal handling system.

Research Status on Dust Removal Technology for High Temperature Gas

High-temperature dust removal technology has a wide range of industrial application, and is an important research direction for the dust removal. The research status, characteristics and application range of several high-temperature dust removal technologies were summarized in this paper, such as high-temperature cyclone dust removal technology, high-temperature filter dust removal technology and high-temperature electrostatic dust removal technology. It is concluded that improving the fine particles collecting efficiency of cyclone dust collector may be an important research direction.

Efficiency characteristic of electrostatic dust precipitation using solar energy

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.

Multi-field coupling and synergistic removal of fine particles in coal-fired flue gas

A new type of cyclone wet electrostatic precipitator was designed and placed at the end of the power plant. It can effectively remove fine particles and aerosol pollutants represented by PM2.5. It combines the cyclone dust removal and electrostatic dust removal mechanisms so that dust particles are driven into the dust collecting plate under the combined action of the cyclone centrifugal force and the electric field. The dust particles are then captured in the wet cleaning environment. The flow field performance, electric field performance (volt-ampere characteristics and plate current density), and dust removal efficiency of the proposed dust collector were evaluated. Mechanistic analysis and performance test of synergistic removal of fine particles in coal-fired flue gas by multi-field coupling showed that the internal flow field of the dust collector conformed to the flow field characteristics of the cyclone, and the internal electric field performance was excellent. The dust removal efficiency of L1000D130 corona pole and L750D80 corona pole dust collector reached 98.04% and 97.59%, respectively. Under different wind speeds, the designed dust collector also exhibited high removal efficiency for fine particles. It can be used as a flue gas treatment end-device for coal-fired power plants.

Mechanism and Effect Analysis of Typical Condensation on Dust Particle Aggregation

The removal of industrial dust is mainly realized by various dust removal equipment. The electrostatic dust remover can remove more than 99.5% of the dust particles of various diameters, but the dust removal effect of particulate particles is not significant. Among them, for the finer particles in the dust, the dust removal effect is poor. After measurement, the efficiency of electrostatic dust removal is 80%-85% for fine particles with a particle diameter of 10-1μm [1]. With our higher demand for particulate emissions, improving the removal of industrial fine particulates is imminent. In the process of dust generation, dust particles collide or come into contact through various paths, thereby combining to generate larger particles, and this process becomes the condensation of dust. The dust agglomeration technology is generally used as a pre-treatment of the flue gas in the field of flue gas dust removal. By enriching the fine particles, the fine particles become larger, and then the dust is removed through the dust removal device.

Study on the Change Characteristics of Dust Specific Resistivity and Electrostatic Precipitation Efficiency

Specific resistance is an important factor affecting the performance of ESP. For the dust resistance than the impact of electrostatic dust removal mechanism, the relationship between dust specific resistance and electrostatic dust removal efficiency, high dust specific resistance and low dust specific resistance in the electrostatic dust produced by the adverse effects. The method of controlling the specific resistance of dust is proposed, which reduces the specific resistance of high specific resistance dust by adjusting the flue gas humidity, changing the flue gas temperature and flue gas quenching. The surface modification technology is used to improve the low specific resistance dust. By controlling the dust specific resistance to 104 to 1010 Ω · cm, the electrostatic precipitator is kept at a high dust removal efficiency.

An experimental study on the characterization of electric charge in electrostatic dust removal

Automatic dust removal using the electrostatic forces of electrodynamic screen (EDS) is an emerging method for mitigation of energy yield losses caused by dust accumulation on solar collectors. Both electric field distribution and dust particles' charge acquired during the removal process play pivotal roles in thorough evaluation of EDS performance. Previous studies have comprehensively analyzed the electric field distribution in EDS. In this paper we have conducted a number of experiments to examine how two EDS design parameters, electrode width and inter-electrode spacing, and two operational parameters, applied voltage and relative humidity, affect dust particles' charge. Sixteen EDS prototypes in two sets were developed and tested in a laboratory environment to study the acquired charge by dust particles via charge-to-mass ratio measurements. It has been shown that the charge-to-mass ratio is directly affected by the electric field intensity on an EDS surface. Furthermore, we have shown the detrimental impact of relative humidity on EDS performance. The results are advantageous in the evaluation of EDS design and its optimization to attain maximum dust removal efficiency.

Experimental Study on Dust Removal Efficiency of Electrostatic Precipitation for Biomass Flue Gas

In view of the problem of electrostatic dust removal of biomass flue gas, the performance of line type high voltage electrostatic precipitator is systematically studied. The effects of the form of the electrode line, the size of the operating voltage (V), the voltage polarity and the inlet flue gas concentration (ρ1) on the dust removal efficiency (η) were obtained. The results show that the dust removal efficiency of the T-shaped line is higher than that of the circular line. The efficiency of dust removal increases first and then tends to be constant with the increase of the voltage. Under the same conditions, the negative voltage efficiency is higher than the positive voltage’s. The efficiency of dust removal decreases with the increase of the inlet concentration.