Balance and stability between particle collection and re-entrainment inawide temperature-range electrostatic precipitator

Zheng, Chenghang; Liang, Chengsi; Liu, Shaojun; Yang, Zhengda; Shen, Zhiyang; Guo, Yishan; Zhang, Yongxin; Gao, Xiang

doi:10.1016/j.powtec.2018.09.056

Cited by 24 publications

(3 citation statements)

References 23 publications

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“…On the one hand, it is necessary to consider adding a particle pre‐charge and fine particle agglomeration device at the inlet of ESP 29 to decrease the amount of particles with the size of 0.1∼1 μm in ESP. On the other hand, it is necessary to strengthen the charging and collecting capacity of particles in the electric field of ESP, meanwhile, it is also necessary to focus on and minimize the secondary dust caused by the end electric field rapping and airflow scouring 30 to reduce the fine particles escape.…”

Section: Resultsmentioning

confidence: 99%

Comparative analysis of energy efficiency of electrostatic precipitator before and after ultralow emission in coal‐fired power plants in China

Liu

Luo²,

Zhang

et al. 2023

Greenhouse Gases

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Electrostatic precipitator (ESP) is the main equipment for flue dust control of coal‐fired power plants in China, accounting for about 70% of the total currently. In this paper, energy efficiency data of ESP, including 202 sets before ultra‐low emission and 45 sets after ultra‐low emission are systematically studied and analyzed by using the research method of field testing and technical investigation. The results showed that after ultra‐low emission, the energy consumption and converted CO2 emission of ESP in coal‐fired power plants increased significantly, and the specific power consumption and energy consumption corresponding to unit mass particulate matter (PM) removal increased by 49.61% and 139%, respectively, and the converted CO2 emission increased by 1.67 × 10−4 kg CO2/m3 and 31.12 kg CO2/t PM on average. The energy consumption of low‐low‐temperature ESP (LLT‐ESP) was positively correlated with its emission reduction range. Before and after the gas cooler operation, the power consumption, specific power consumption and energy consumption corresponding to unit mass PM removal increased by 8.06%–38.68%, 10.66%–60.14% and 7.23%–62.98%, respectively, and the CO2 emissions corresponded increased by 26.29–691.81 kg CO2/h, 0.46–2.18×10−4 kg CO2/m3, 1.10–23.62 kg CO2/t PM, respectively. LLT‐ESP had a great possibility to optimize the operation for energy‐saving and carbon‐reduction, because when the high voltage power supply operated on the maximum output mode and the energy‐saving mode, the drop of power consumption and specific power consumption was around 52.00%–58.23%, 52.02%–58.29%, respectively, and the CO2 emission reductions corresponded was 1,039.25–1,359.35 kg CO2/h, 2.71–3.58×10−4 kg CO2/m3, respectively. LLT‐ESP also had the great optimizing possibility for energy‐saving and carbon‐reduction during low load operation, as when the load reduced from 100% to 50%, the specific power consumption and energy consumption corresponding to unit mass PM removal increased by 5.05%–45.50%, 6.59%–63.90%, respectively, and the CO2 emissions corresponded increased by 0.38–2.44×10−4 kg CO2/m3, 6.76–45.98 kg CO2/h, respectively. The operation energy consumption can be effectively reduced by integrated use of multiple electric dust removal technologies, such as compared with LLT‐ESP technology, the power consumption, specific power consumption and energy consumption corresponding to unit mass PM removal of “low‐low‐temperature + moving electrode+ electrostatic agglomeration” decreased by 37.88%, 30.08% and 45.29% respectively, and the corresponding CO2 emission decreased by 697.22 kg CO2/h, 1.87×10−4 kg CO2/m3 and 32.98 kg CO2/t PM, respectively. The current national standard GB 37484‐2019 is no longer applicable to the energy efficiency evaluation of the ESP in ultra‐low emission units. This study can provide data support for the revision of national standard GB 37484‐2019 and the collaborative efficiency of coal power plant pollution reduction and carbon reduction. © 2023 Society of Chemical Industry and Joh...

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Section: Resultsmentioning

confidence: 99%

Comparative analysis of energy efficiency of electrostatic precipitator before and after ultralow emission in coal‐fired power plants in China

Liu

Luo²,

Zhang

et al. 2023

Greenhouse Gases

View full text Add to dashboard Cite

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“…Other parameters can be considered when assessing the performance of an ESP, depending on the specific needs of each application. Notable examples include electrical characteristics [7][8][9][10]26], electrohydrodynamic (EHD) flow characteristics [27][28][29][30][31], re-entrainment minimization [4,32], initial installation cost [33], and size constraints.…”

Section: Zhibin and Guoquan Methodsmentioning

confidence: 99%

Evaluating Performance Indices of Electrostatic Precipitators

Badran

Mansour

2022

Energies

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Utilizing electrostatic precipitators (ESPs) is an efficient particle removal method that sees a wide usage in industrial environments. This is mainly because of the low drop of the pressure flow, while retaining high collection efficiency, alongside being cost-effective. This paper reviewed previous works concerning optimizing the performance of single- and multi-stage ESPs by changing several design parameters and evaluating the effects on different performance indices, such as the corona power ratio, current-voltage characteristics, and overall collection efficiency. The review then goes through several modelling methodologies, showcasing their shortcomings and developments, as well as the relationship between the electrohydrodynamic (EHD) flow and the precipitation performance. The performance effects of using different electrode configurations and designs in terms of the number of electrodes, relative dimensions, spacings, channel lengths, and overall design were also reviewed.

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“…Y. S. Eom performed a simulation of a chamber separator with a double-walled facade, finding that the efficiency of the separator was almost 93% at an inlet air velocity of 0.5 m•s −1 [11]. Xiang Gao built an experimental precipitator to study the effects of applied voltage, flow velocity, and temperature on the separation process., they a separation efficiency of 50-75% was achieved in [12] with different operating settings. Another experimental precipitator was dealt with by the work of Molchanov, which differed from the other devices in that it was placed directly in the combustion furnace.…”

Section: Introductionmentioning

confidence: 92%

Design of a Low-Cost Electrostatic Precipitator to Reduce Particulate Matter Emissions from Small Heat Sources

et al. 2022

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Capturing particulate matter (PM) is an important issue due to the protection of human health and the quality of their life. This paper describes the innovation of an affordable particulate matter capture device for small heat sources to reduce particulate matter emissions. The design of two investigated variants of the device is based on the principle of a tubular electrostatic precipitator with one charging electrode placed in the chimney. The design of the precipitators is aimed at increasing the area of the collecting electrodes by elements dividing precipitation space, with a simultaneously increased number of charging electrodes. The influence of the elements’ application on the pressure drop and the gas flow velocity through the devices is analyzed by computational fluid dynamics (CFD). The work is further focused on the economic evaluation of precipitators and design adjustments for lower energy consumption. The achieved results show the right direction of efforts to improve the equipment designed to capture PM emissions.

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Balance and stability between particle collection and re-entrainment inawide temperature-range electrostatic precipitator

Cited by 24 publications

References 23 publications

Comparative analysis of energy efficiency of electrostatic precipitator before and after ultralow emission in coal‐fired power plants in China

Comparative analysis of energy efficiency of electrostatic precipitator before and after ultralow emission in coal‐fired power plants in China

Evaluating Performance Indices of Electrostatic Precipitators

Design of a Low-Cost Electrostatic Precipitator to Reduce Particulate Matter Emissions from Small Heat Sources

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