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Author

Gao Xianglin

Bio: Gao Xianglin is an academic researcher from North China Electric Power University. The author has contributed to research in topics: Corona ring & Vibration. The author has an hindex of 1, co-authored 3 publications receiving 6 citations.

Papers
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Book ChapterDOI
01 Jan 2009
TL;DR: In this article, the effect of bad vibration on the efficiency of electrostatic precipitators was analyzed by using the rule of ash-deposition and the influence of boiler load, fly ash coefficient, carbon content in fly ash and dust content consistency in flue gas on vibration period was analyzed.
Abstract: The normal operation of the vibration equipment and the dust removing equipment of EP is an important factor to ensure EP in a safe, stable and efficient running and has a direct influence on the efficiency of EP and the working life of the related equipments. According to statistics, in electrostatic precipitators which collection efficiencies were less than 95%, it was mostly caused by the bad vibration effect. The vibration periods of each electric field were analyzed by researching the rule of ash-deposition; the influence of boiler load, fly ash coefficient, carbon content in fly ash and dust content consistency in flue gas on vibration period was analyzed by calculating with vibration period calculation formula; giving an example to show the EP at a coal-fired boiler, the vibration periods of each electric field with were calculated theoretically based on the coal and the evaporation capacity were compared with the actual vibration periods to ensure and adjust vibration periods.

5 citations

Book ChapterDOI
01 Jan 2009
TL;DR: In this paper, the dust removal efficiency formula reflecting the characteristics of high voltage power supply, efficiency enhancing and energy saving and intelligent optimization control was studied based on theoretical reaching rate, operating status quo of EP and successful study and extension of HVPP facility with efficiency enhancing, energy saving, and spark setting.
Abstract: Based on theoretical reaching rate, operating status quo of EP and successful study and extension of high voltage power supply facility of EP with efficiency enhancing and energy saving, the dust removal efficiency formula reflecting the characteristics of high voltage power supply, efficiency enhancing and energy saving and intelligent optimization control was studied. It was indicated that the effective reaching rate and the dust removal efficiency were in the direct ratio to the peak and the minimum of the secondary voltage under the working manner of high efficiency and energy saving and the working manner of spark setting through the formula. The basis can be provided for the optimization and the efficiency enhancing and energy saving of high voltage power supply facilities of EP by the formula.

1 citations

01 Jan 2006
TL;DR: Different types and geometries of corona electrodes were proposed to add a channel shaped wind buffer, which has the same voltage with the corona wire and located between subsequent corona wires.
Abstract: At the exit of electro static precipitator, among the escaped particles there have not only neutralized particles, but also particles that remaining negative and positive charges. Sometimes positively charged particles can account for 30%~50% of the total particles escaped. They are formed probably from the reentrainment by corona electrode rapping or from back corona effects. In view of this phenomena, for strengthen the corona electrode capability of capturing positively charged particles; new types of corona electrodes were investigated. It has multi- function of corona discharge, reducing back corona, prevent reentrainment and collect the positively charged particles. Different types and geometries of corona electrodes were proposed; all of them were featured to add a channel shaped wind buffer, which has the same voltage with the corona wire and located between subsequent corona wires. These buffers can reduce gas flow scouring reentrainments, collect positively charged particles and restrain back corona by electrostatic shielding effect. Bench scale laboratory tests were made to explore their discharging characteristics, current density distributions, etc. Two- dimension flow mathematics models were set up and boundary conditions were confirmed. Using k- eequation, the pure air turbulent flow fields of corona electrodes with and without wind buffers were studied.

Cited by
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Journal ArticleDOI
TL;DR: Through the study of volt-ampere characteristics, electrical and capacitive properties, and electrical breakdown characteristics of coal-fired fly ash, it is found that the V–I characteristics of ash samples in thermal power plant do not strictly follow the formula.
Abstract: China is the biggest consumer of coal. Every year, half or more of China’s coal is used in the power industry. Most thermal power plants in China use electrostatic precipitators to treat solid particulate matter in flue gas. The efficiency of the electrostatic precipitator in removing dust has a considerable influence on atmospheric pollutants. However, the most important factor affecting the efficiency of the electrostatic precipitator in removing dust is the dielectric properties of the fly ash. Through the study of volt-ampere characteristics, electrical and capacitive properties, and electrical breakdown characteristics of coal-fired fly ash, it is found that the V–I characteristics of ash samples in thermal power plant do not strictly follow the formula ( $$ R=\frac{U}{I} $$ ), the type of coal, and the chemistry of coal. Ingredients are related; disparate types of ash samples have disparate capacitances, and the measurement of capacitive contrast resistance has a certain influence.

18 citations

Journal ArticleDOI
TL;DR: In this paper, an electrostatic precipitators (ESP) with high electric field, which does not use corona discharge, was investigated, and the collection efficiency at the electrode length of 450 mm was 77.6% at 12.5 kV when the ratio of the input power was lower than 0.33 W/(m3/s).
Abstract: In this article, an electrostatic precipitators (ESP) with high electric field, which does not use corona discharge, was investigated. The ESP had a parallel plate configuration composed of a high voltage application plate electrode and grounded plate electrode with a gap of 5 mm. The electrode length was between 150 and 450 mm. The air was flowed at the gas velocity between 0.5 and 5 m/s in the ESP by a fan. A voltage up to 12.5 kV was applied to the high voltage application electrode, whereby the electric field intensity of 25 kV/cm was generated between the electrodes. The particle concentration in the air for the particle size between 0.3 and 5 μ m was measured to calculate the collection efficiency. The collection efficiency in a conventional two-stage type ESP was also measured, and compared to the result in the ESP with high electric field. As a result, the collection efficiency at the electrode length of 450 mm was 77.6% at 12.5 kV, when the ratio of the input power was lower than 0.33 W/(m3/s), in the ESP with high electric field. On the other hand, the collection efficiency in the conventional ESP was 65.6% or 82.0% at the input power of 14.2 W/(m3/s) or 24.8 W/(m3/s). Therefore, it is revealed that the ESP with high electric field is effective for energy saving.

4 citations

Journal ArticleDOI
TL;DR: In this paper, the authors have presented FEA concept of modelling and analysis of collecting electrodes of an Electrostatic Precipitator by Implicit Transient Dynamic Analysis (IDEA).
Abstract: Electrostatic Precipitator is the device used for controlling air pollution. This is used for cleaning of boiler process gases. Process gases contain suspended dust particles. These dust particles are collected on collecting electrodes. The effectiveness of Electrostatic Precipitators is affected by various factors. Periodic cleaning of collecting system plays a major role. Dust gets deposited on collecting electrodes and dislodged by means of vibrations of collecting electrodes. For huge volume of process gas the size of Electrostatic Precipitator will also be large. Since space is major constraints the ultimate solution will to go vertically i.e. increase the height and accordingly the collection area. Since the height is increased old methods of rapping will be ineffective and hence the new methods introduced to increase the vibration. Time is another major constraint for checking of such continuous improvements. So simulation and further physical measurement is more practical method. This paper presents FEA concept of modelling and analysis of collecting electrodes of an Electrostatic Precipitator by Implicit Transient Dynamic Analysis. Experimental testing is done for validation. The results of FEA concept and physical measurements are discussed.

2 citations

15 Jun 2015
TL;DR: In this article, the effect of producing vibrations in the collecting plate of Electrostatic Precipitator was studied at different height of Rapping Hammer and a finite element method based on the software ANSYS was used to simulate the vibrations produced in the collected plate.
Abstract: Electrostatic Precipitator is the device used for controlling air pollution. This is used for cleaning of boiler process gases. Process gases contain suspended dust particles. These dust particles are collected on collecting electrodes. The effectiveness of Electrostatic Precipitators is affected by various factors. Periodic cleaning of collecting system plays a major role. Dust gets deposited on collecting electrodes and dislodged by means of vibrations of collecting electrodes. For huge volume of process gas the size of Electrostatic Precipitator will also be large. Since space is major constraints the ultimate solution will to go vertically i.e. increase the height and accordingly the collection area. Since the height is increased old methods of rapping will be ineffective and hence the new methods introduced to increase the vibration. On the basis of vibrations and forces on the collecting plate, the vibration performance of collecting plate of Electrostatic Precipitator will be estimated by using finite element analysis (FEA). The current study focuses on definite amount of vibrations in the collecting plate of Electrostatic Precipitator. The effect of producing vibrations in the collecting plate was studied at different height of Rapping Hammer. A finite element method based on the software ANSYS used to simulate the vibrations produced in the collecting plate. In order to validate result of Finite Element Software Experimental testing is required .The overall objective of this project is to produce definite amount of vibrations in the collecting plate of Electrostatic Precipitator for different height of collecting plate. This study will be helpful in understanding the Dynamic performance of Electrostatic Precipitator in the Environmental engineering.
Journal ArticleDOI
TL;DR: Based on the classical theory of electrostatic precipitator and the operating status quo of EP, the paper has been focused on the principles of energy-saving and emission-reduction EP, established high-voltage current supply energy saving and emission reduction EP dust removal efficiency of mathematical models, analyzed the low voltage device and proposed the technical solutions as discussed by the authors.
Abstract: According to operation situation of power plant’s EP, the technical measures of energy saving in low-voltage power supply system have been analyzed over the years. Based on the classical theory of electrostatic precipitator and the operating status quo of EP, the paper has been focused on the principles of energy-saving and emission-reduction EP, established high-voltage current supply energy-saving and emission-reduction EP dust removal efficiency of mathematical models, analyzed energy saving and emission reduction technical measures of the low voltage device and proposed the technical solutions. It provided reference for design, adjustment, operation and energy saving of power plant’s EP.