Effect of charged water drop atomization on particle removal performance in plate type wet electrostatic precipitator

Teng, Chenzi; Fan, Xing; Li, Jian

doi:10.1016/j.elstat.2020.103426

Cited by 20 publications

(4 citation statements)

References 29 publications

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“…Concerning the installation of the electrode that delivers the electric charge to the particles in the fumes, the results suggested adequate conditions for its operation with phase velocities of 0.6 m/s [19,20] and temperature below 90 °C [21,22]. Regarding energy recovery efficiency, the temperature of the combustion gases was reduced from 183 °C to 67 °C, equivalent to 0.96 [kW] transferred to the water.…”

Section: Resultsmentioning

confidence: 99%

Design of a Condensing Heat Recovery Integrated with an Electrostatic Precipitator for Wood Heaters

Farías,

Cornejo,

Cuevas

et al. 2023

Proceedings of the XV Ibero-American Congress of Mechanical Engineering

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High emission of particulate matter from fixed sources of biomass combustion and the effects on the health of the population have driven the implementation of public policies for changes in the energy matrix and a technological replacement in Chile. Due to this, a prototype of a condensing heat exchanger is developed integrating an electrostatic precipitator, seeking to enhance the positive effects of these technologies in a single and relatively compact device. The state of the art shows similar developments, but with high levels of complexity in construction, as a shell and tube heat exchanger, that is why the concept of a thermocannon was optimized to condense the moisture present in the fumes and reduce smoke emissions through an electric field. It is expected that using an electrostatic precipitator, up to 90% of particulate matter emissions will be captured, and thermal efficiencies of an additional 9%. For its design, heat transfer and thermodynamics models were used and validated through CFD modeling.

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Section: Resultsmentioning

confidence: 99%

Design of a Condensing Heat Recovery Integrated with an Electrostatic Precipitator for Wood Heaters

Farías,

Cornejo,

Cuevas

et al. 2023

Proceedings of the XV Ibero-American Congress of Mechanical Engineering

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show abstract

“…Subsequently, the particles are deposited at the collecting plates and get collected (Yamamoto & Velkoff 1981;Zhao & Adamiak 2008). Although they are widely used, the ESP devices encounter problems such as particle re-entrainment and insufficient capacity to remove small particles (Teng et al 2020). In particular, in recent years, the emission of PM 2.5 (particles with diameters less than 2.5 μm) endangers the environment and public health (especially in developing countries), leading to more stringent PM 2.5 -emission limits in the past decade worldwide (Mep 2011).…”

Section: Introductionmentioning

confidence: 99%

“…An electrostatic precipitator (ESP) remains one of the most popular devices for the waste-gas treatment. The ESP is widely used in coal-fired power plants, accounting for nearly 80 % of factories in China in the past few decades (Teng, Fan & Li 2020). The ESP in general has the advantages of low energy consumption, large flue gas treatment capacity and high-efficiency (Jaworek et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Numerical analyses of wire-plate electrohydrodynamic flows

Vázquez

Zhang

2023

J. Fluid Mech.

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We present numerical analyses of two-dimensional electrohydrodynamic (EHD) flows of a dielectric liquid between a wire electrode and two plate electrodes with a Poiseuille flow, using direct numerical simulation and global stability analysis. Both conduction and injection mechanisms for charge generation are considered. In this work we focused on the intensity of the cross-flow and studied the EHD flows without a cross-flow, with a weak cross-flow and with a strong cross-flow. (1) In the case without a cross-flow, we investigated its nonlinear flow structures and linear dynamics. We found that the flow in the conduction regime is steady, whereas the flow in the injection regime is oscillatory, which can be explained by a global stability analysis. (2) The EHD flow with a weak cross-flow is closely related to the flow phenomena in an electrostatic precipitator (ESP). Our analyses indicate that increasing the cross-flow intensity or the electric Reynolds number leads to a less stable flow. Based on these results, we infer that one should adopt a relatively low voltage and weak cross-flow in the wire-plate EHD flow to avoid flow instability, which may hold practical implications for ESP. (3) The case of strong cross-flow is examined to study the EHD effect on the wake flow. By comparing the conventional cylindrical wake with the EHD wake in linear and nonlinear regimes, we found that the EHD effect brings forward the vortex shedding in wake flows. Besides, the EHD effect reduces the drag coefficient when the cross-flow is weak, but increases it when it is strong.

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“…However, DESPs have disadvantages of generating harmful ozone due to corona discharge and reduced collection efficiency for fine particles like PM 2.5 [8]. Additionally, DESPs showed a rapid decrease in dust collection efficiency after 15 and 20 min of continuous operation, with 15.7% to 39% and 5% to 21% efficiency reduction, respectively [9].…”

Section: Introductionmentioning

confidence: 99%

Ensemble Prediction Model for Dust Collection Efficiency of Wet Electrostatic Precipitator

2023

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WESPs (Wet Electrostatic precipitators) are mainly installed in industries and factories where PM (particulate matter) is primarily generated. Such a wet type WESPs exhibits very excellent performance by showing a PM collection efficiency of 97 to 99%, but the PM collection efficiency may decrease rapidly due to a situation in which the dust collector and the discharge electrode is corroded by water. Thus, developing technology to predict efficient PM collection in the design and operation of WESPs is critical. Previous studies have mainly developed machine learning-based models to predict atmospheric PM concentrations using data measured by meteorological agencies. However, the analysis of models for predicting the dust collection efficiency of WESPs installed in factories and industrial facilities is insufficient. In this study, a WESPs was installed, and PM collection experiments were conducted. Nonlinear data such as operating conditions and PM measurements were collected, and ensemble PM collection efficiency prediction models were developed. According to the research results, the random forest model yielded excellent performance, with the best results achieved when the target was PM 7: R2, MAE, and MSE scores of 0.956, 0.747, and 1.748, respectively.

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Effect of charged water drop atomization on particle removal performance in plate type wet electrostatic precipitator

Cited by 20 publications

References 29 publications

Design of a Condensing Heat Recovery Integrated with an Electrostatic Precipitator for Wood Heaters

Design of a Condensing Heat Recovery Integrated with an Electrostatic Precipitator for Wood Heaters

Numerical analyses of wire-plate electrohydrodynamic flows

Ensemble Prediction Model for Dust Collection Efficiency of Wet Electrostatic Precipitator

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