ICESP XV – Charlotte, USA, 2018
The International Conference on Electrostatic Precipitation (ICESP) is the official conference of the International Society for Electrostatic Precipitation (ISESP). The following is a list of papers from the ICESP XV Conference under their respective topic. Click on the title to view paper.
ESP School
Current Electric Utility Environmental Regulations and Strategies
Understanding the Deutsch Equation
Fundamentals of Gaseous Discharges for ESP
Flow Modeling and Testing of ESPs
ESP Maintenance and Operations Requirements in the New Utility Market
An Historic Outline of Electrical Control Systems Used in The Process of Electrostatic Precipitation
MICRO-PULSE POWER SUPPLIES & ESP Power Supply Fundamentals
Electrostatic Precipitation Resistivity
Technical Sessions
Latest Application of Moving Electrode Electrostatic Precipitator.
The purpose of this study is to investigate the collection characteristic of nano-particles emitted from a diesel engine with residual fuel oil and light fuel oil in an electrostatic precipitator (ESP). The experimental system consisted of a diesel engine (displacement 400cc) and an ESP, and residual fuel oil and light fuel oil were used for the diesel engine. As a result, the concentration for the particle size less than approximately 20 nm increased at voltages of -16 kV and -18 kV in comparison with that at 0 kV in the exhaust gas from the diesel engine with residual fuel oil. However, the total number collection efficiency in the exhaust gas using the residual fuel oil was 87%.On the other hand, the particle concentration for the particle diameter less than 20 nm did not increase in the exhaust gas from the engine with light fuel oil.
Reduction of Mercury Emissions from Combustion Processes Using Electrostatic Precipitators.
The article presents the results of laboratory and industrial tests on the reduction of mercury emissions from coal combustion in power boilers. In laboratory conditions, the influence of the quantity of unburned carbon in fly ash on the adsorption of mercury compounds on its surface has been studied. The obtained results confirm that the higher content of unburned carbon in fly ash improves its ability to accumulate Hg and promotes the reduction of mercury emission downstream the electrostatic precipitator. In industrial tests, the possibility to add selected additives to oxidize the metallic mercury has been studied. The key feature of the solution is the oxidation of metallic mercury by injecting dedicated oxidizing additives into the flue gas duct upstream the electrostatic precipitator (ESP) and using fly ash as an adsorbent for mercury compounds. The use of the proposed solutions can contribute to the reduction of mercury emissions. In some cases, it can ensure compliance with regulatory requirements of mercury concentrations in the flue gas without the need to build expensive mercury control installations.
Effect of Carbon Grounded Electrode with Positive Corona- Y. Kawada_resubmi
Behavior of unburned biomass fly ash particles in ESPs- D. Steiner
Fluid dynamic analysis of two-phase ionic flows- O. Masaaki
Fundamentals of electrostatic precipitator (EP) and three-dimensional electro-fluid dynamic flows are described. In recent years, EP research was thought to be a field that is released from academic researchers and was almost completely shifted to industry. However, due to the growing awareness of nanoparticle problems represented by recent PM2.5 problems, EP characteristics of low pressure drop and high collection efficiency of nanoparticles are attracting attention as a substitute for filters, and application to automobiles is considered. In this paper, first, a system of basic equations governing electro-fluid dynamic ionized flows is presented. Based on the basic equations, results of the three-dimensional flow interaction for tuft or point corona for industrial EPs was reported using both laminar and turbulent flow models. In the results, the secondary flow distribution based on laminar flow model forms a pair of organized donut-shaped rings generated from every corona or tuft points, while a pair of rings is less organized for turbulent flow model. Next, because the temperature of the exhaust gas targeted by EP may sometimes reach 200°C or higher, systematically investigation of the influence of the exhaust gas temperature on the behavior of fine particles, the situation of secondary flow, and the reduced dust collection efficiency are shown and explained. Finally, other analysis results on EP are briefly reviewed. EP will become the core particulate (PM) removal technology of the future, and it can be expected to revitalize the research in the near future. We would like to perform detailed fluid dynamic analysis focusing on nanoparticle behavior.
Investigation of EHD Enhanced Turbulence – Bacher
Enhanced heat and mass transfer due to electrohydrodynamically induced flow in electrostatic precipitators provides a potential opportunity for versatile new applications in the process industry. After a short review of the physical fundamentals it is explained why measurements of the pressure gradient play an important role in the design principles for this technology. Its external influence by operating parameters like voltage polarity and aerosol conditions will also be shown. In the second part, the feasibility of enhanced mass and heat transfer is demonstrated based on laboratory measurements. In combination with the previously discussed pressure gradient measurements, methods for simplified engineering concepts like equivalent mean flow velocities or turbulent diffusion coefficients are shown. The topic is rounded off by outlining a potential use in decentralized power generation.
Latest Application of Moving Electrode Electrostatic Precipitator- C. Bacher
In order to help answering the question “Which electrode design is the best?”, the precipitation performance of a tubular ESP was determined for different electrode designs with special attention to specific energy consumption. Experiments were conducted in a wire-tube arrangement with a high loading of liquid submicron particles. The experiments are supplemented by numerical simulation results showing the effect of residence time and specific energy input on penetration levels.
HV Power Supplies in Sinter Plant ESPs – Schmoch
Switch Mode Power Supplies for South African Coal – Farmer
Shedding Light on the Operational Differences of 3 Phase Transformer- R. Guenther
The purpose of this paper is to eliminate confusion and misinformation regarding the operational differences of a 3 phase SCR controlled transformer rectifier (3 phase SCR-TR) and the NWL PowerPlus™ switch mode power supply (SMPS) when operating on an actual electrostatic precipitator (ESP). In brief, SMPS electrical performance across all fields is quite consistent while 3 phase-SCR-TR electrical performance is strongly dependent on the operating point for each field.
Analyzing actual ESP operating data across all fields from inlet to outlet, this paper will present a realistic comparison of the electrical parameters for equivalent rated SMPS versus 3 phase SCR-TR operation.
The collected ESP data consists of the kVdc and mAdc for each field on an operating ESP presently using SMPS units. The evaluation then compares input kVA, power factor, harmonic current distortion levels, and kVpeak to kVdc ripple for both SMPS units and 3 phase SCR-TR units for each field. The net kVA, power factor, harmonic current level, and kW for the entire ESP box will also be compared.
The purpose of this paper is to educate users and OEMs on the electrical performance differences for each technology over the realistic spectrum of actual operational conditions on an ESP.
ESPs for Ultra-Low Emissions from Coal Fired Power Plants – Li
In this paper, the development history of coal-fired power plants in China was reviewed, the evolution of atmospheric pollutant emission requirements from coal-fired power plants in China was introduced, ultra-low emission technology for atmospheric pollutants in coal-fired power plants was briefly described, the application results for ultra-low emission technologies were summarized, and the prospect of development of power industry in China was made. China has achieved remarkable results since implementing the ultra-low emission policy of coal power in September 2014. The total atmospheric pollutants emissions for thermal power industry, emission intensity for per-unit power generation, and coal consumption for power supply in China have decreased significantly. “The thermal power plant is a major emitter for atmospheric pollutants in China” has been effectively improved; At the same time, it has made significant contributions to reduce emissions of dust, SO2 and NOX in China. In recent years, the atmospheric environment has been generally improved, and the major atmospheric pollutant concentration in China has continued to decline. The proportion of days with excellent air quality is increased in typical cities such as Beijing and Shanghai. The days of severe pollution and above have decreased.
PM and SO3 Co-benefit of Low-Low-Temperature ESPs – Yao
In recent years, low-low temperature ESP（LLT-ESP）has started its application in the coal-fired power plant flue gas ultra-low emissions in China. Taking the low-low temperature ESP of Zheneng Wenzhou power plant 660 MW unit for research object, the PM and SO3 co-benefit removal effects for low-low temperature ESP were tested, besides the resistivity of fly ash and dust removal efficiency under low-low and conventional temperature were studied. The results showed that before and after operation of gas cooler, the working-condition specific resistivity of fly ash under low-low temperature is lower than that at the general temperature one order of magnitude, the emission of dust decreased from 6.94 mg/m3 to 3.25 mg/m3 which met ultra-low emissions requirements, and the SO3 removal rate was 96.6%.
Low-Low Temperature ESPs Applied to High-Ash Coals – Li
The low-low temperature ESP (LLT-ESP) can achieve the goal of efficiency-enhancement and energy-conservation, it also has high SO3 removal efficiency. Low temperature corrosion will not occur if dust/SO3 ratio (D/S ratio) is greater than 100.,The topics on main technical parameter settings, necessary concerns and countermeasures, pollutant emission reduction characteristics of low-low temperature ESP, etc were elaborated and analyzed in this paper. A typical case of 660 MW unit in Huaibei Pingshan power plant was presented. The test showed that the dust removal efficiency of the ESP was 99.97%, the outlet dust concentration of ESP was 4.47 mg/m3and PM2.5 concentration was 2.4 mg/m3, the dust concentration after WFGD was 2.3 mg/m3, which proved that low-low temperature ESP in combination with rotating electrode type ESP not only could reduce the outlet dust concentration of ESP to 5 mg/m3, but also could realize ultra-low emission for high-ash low quality coal.
Coromax Micropulse Power Supplies – Bidoggia
Several classes of power supplies for ESP exist and the choice of the correct class is related to the resistivity of the dust to filter. The case of a power plant with high-resistivity dust emissions, for which the replacement of the existing power supplies with micro-pulse power supplies has succeeded in halving the dust emission level, is presented. The presentation is completed with data measured before and after the installation of the new power supplies and with a simplified analytical explanation supporting the results.
ESPs for Soda Recovery Boilers in the Pulp & Paper Industry- K. Poulsen
Behavior of Particle Reentrainment in ESPs – Miyashita
Testing and characterization of a shielded E. Lamminen
This study will present laboratory and field testing results of a shielded corona electrode (SCC) for the purpose of particulate removal from small and medium scale combustion boilers. The SCC charging efficiency is shown to agree with theory in laboratory conditions. In field conditions the SCC achieved a high particulate removal efficiency (85%) for a pellet boiler. This study suggests that SCC is a potential low cost solution to meet future emission limits for small and medium scale boilers.
Dual FGC – Process Technology and Experience – Ferrigan
Fast Simulation of Mercury Capture in ESPs – Clack
Electrostatic Precipitator for Broad Band Coal with 6 mg Outlet Dust -J. Von Stacklberg
