Research Progress on the Electric Coagulation of Fine Dust

2014 ◽  
Vol 955-959 ◽  
pp. 2594-2599
Author(s):  
Ruo Bai Ma ◽  
Kai Quan Wang ◽  
Hai Pu Bi
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Collection Efficiency ◽  
Constant Electric Field ◽  
Research Progress ◽  
Charged Dust ◽  
Fine Dust ◽  
Dust Collection ◽  
Advantages And Disadvantages ◽  
Dust Collection Efficiency

Fine dust in the atmosphere is one of the key factors causing air pollution as well as fog and haze. Due to the limited efficiency of fine dust collection in conventional dust removal technology, pre-charged dust coagulation between particles to increase the effective collecting diameter, is an effective way to improve the dust collection efficiency. Currently, coagulation technology research falls into three mainly aspects: electric coagulation technology in constant electric field, alternating electric field and pulsed electric fields. The advantages and disadvantages as well as the research status and trends are fully analyzed in this paper, of which the technology that uses alternating or pulsed power supply for pre-charge device has more advantages and efficiency in coagulation. They will improve the efficiency of electric coagulation in further on the improved airflow pole with form and structure and the technical development of alternating or pulsed powers, which will make the coagulation and filtration technologies and new composite technology an important development direction of fine dust governance.

scholarly journals Performance Testing of HTHP Electrostatic Precipitator at NYU PFBC Facility

1988 ◽  
Author(s):  
R. Radhakrishnan ◽  
P. K. Gounder ◽  
S. Kavidass ◽  
V. Zakkay ◽  
R. Dellefield
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Electrostatic Precipitator ◽  
Collection Efficiency ◽  
Operating Experience ◽  
Performance Testing ◽  
Test Facility ◽  
Dust Collection ◽  
Ongoing Research ◽  
Dust Collection Efficiency

NYU has an ongoing research program which is being funded by DOE to test three types of high-pressure, high-temperature filters. The main objectives of the testing program are: (1) to establish the performance capability of the filters under high-pressure and high-temperature conditions; and (2) to evaluate the dust collection efficiency. Shakedown tests for a duration of about 50 hours was completed during October 1986. Testing of the electrostatic precipitator (ESP) is in progress. The first test with ESP was performed during the middle of November 1986. The operating experience with respect to the test facility, and in particular with the particulate sampling systems, is reported in this paper. Additionally, some test results are also discussed.

scholarly journals Dust emissions’ reduction into the atmosphere by environmental-engineering systems of smallsize devices with counter-swirling flows (CSF)

2019 ◽  
Vol 138 ◽  
pp. 01037
Author(s):  
N.M. Sergina ◽  
A.A. Sakharova ◽  
V.N. Azarov ◽  
D.V. Azarov ◽  
M.A. Nikolenko
Keyword(s):  
Collection Efficiency ◽  
Swirling Flows ◽  
Environmental Engineering ◽  
Emissions Reduction ◽  
Dust Collector ◽  
Engineering Systems ◽  
Collection System ◽  
Dust Collection ◽  
Dust Emissions ◽  
Dust Collection Efficiency

The article discusses the features of using environmentalengineering systems of small-size devices with counter-swirling flows (CSF) to reduce dust emissions into the atmosphere. The reasons for the decrease of the dust collection efficiency by CSF systems are analyzed. The layout diagram of the dust collection system with CSF devices and the organization of suction from the dust collector hopper are given.

Electronic structure of POPC phospholipids under constant electric field

2017 ◽  
Vol 31 (22) ◽  
pp. 1750157
Author(s):  
Jaciéli Evangelho de Figueiredo ◽  
Leandro Barros da Silva
Keyword(s):  
Electronic Structure ◽  
Dipole Moment ◽  
External Field ◽  
Electric Field ◽  
Electric Fields ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Constant Electric Field ◽  
Ab Initio Study ◽  
Electronic And Structural Properties

We report in the present paper an ab initio study on the electronic and structural properties of phospholipidic membranes under the influence of electric fields. We show that the external field alters the charge distribution of the molecule leading to a modification in the electric dipole moment. The torque on the phospholipid may then cause a transmembranar stress, which by its turn, weakens the membrane allowing to the formation of a pore.

Study on Water Spraying System in Wet Electrostatic Precipitator

2013 ◽  
Vol 423-426 ◽  
pp. 1732-1736 ◽  
Author(s):  
Li Chun Xiao ◽  
Zhi Jiang Ding ◽  
Qiang Li
Keyword(s):  
High Efficiency ◽  
Electrostatic Precipitator ◽  
Collection Efficiency ◽  
Water Pressure ◽  
Operating Voltage ◽  
Electrostatic Precipitation ◽  
Dust Collection ◽  
Dust Collection Efficiency

The dust collected in the polar plates can be washed out by a spraying system in the wet electrostatic precipitator. It is important to keep the spraying system having a high efficiency lest the dust returns to the gas again. The performance of the spraying system in the electrostatic precipitation and its influence on the dust collection efficiency are presented in the paper. The atomization characteristic of the spraying nozzle is measured by changing the water pressure and operating voltage. The results show that: Collection efficiency of the electrostatic precipitation is over 99.5 % when the water pressure is 0.4 MPa.When the spraying mists diameter is 100 μm, the collection efficiency is 92 % for the dust diameter under 10 μm. It will provide a basis for the design of spraying system in wet electrostatic precipitation by this analysis.

scholarly journals Study of dust collection effectiveness in cyclonic-vortex action apparatus

2021 ◽  
Vol 1 (3(57)) ◽  
pp. 21-25
Author(s):  
Andrei Torsky ◽  
Alexander Volnenko ◽  
Leonid Plyatsuk ◽  
Larysa Hurets ◽  
Daulet Zhumadullayev ◽  
...  
Keyword(s):  
Turbulent Diffusion ◽  
Particle Deposition ◽  
High Efficiency ◽  
Collection Efficiency ◽  
Dust Collector ◽  
Fine Dust ◽  
Dust Collection ◽  
Contact Stage ◽  
Fractional Efficiency ◽  
Overall Efficiency

The object of research is the efficiency of dust collection of fine dust in an apparatus with an intense turbulent mode of phase interaction. One of the most problematic areas of the existing dust and gas cleaning equipment is the low efficiency of collecting fine dust. Effective cleaning of exhaust gases from dust involves the use of multi-stage cleaning systems, including wet and dry dust cleaning devices, which entails high capital and operating costs. These disadvantages are eliminated in the developed design of the cyclone-vortex dust collector with two contact zones. The device implements both dry and wet dust collection mechanisms, which allows for high efficiency of dust removal at high productivity. The conducted studies of the total and fractional efficiency of dust collection when changing the operating parameters of the developed device showed that the efficiency of collecting fine dust is 98–99 %. The increase in the efficiency of dust collection in the dry stage of the device is due to an increase in centrifugal force. In the wet stage of contact, the efficiency reaches its maximum values due to the vortex crushing of the liquid in the nozzle zone of the apparatus. Studies of the fractional efficiency of the apparatus show that with an increase in the diameter of the captured particles, the efficiency of the dust collection process for dry and wet stages, as well as the overall efficiency, increases. With an increase in the density of irrigation, the overall efficiency of dust collection in the apparatus increases. It has been established that an increase in the efficiency of capturing highly dispersed particles occurs due to turbulent diffusion, the value of which is determined by the frequency of turbulent pulsations and the degree of entrainment of particles during the pulsating motion of packed bodies. To describe the results obtained, a centrifugal-inertial model for a dry contact stage and a turbulent-diffusion model of solid particle deposition for a wet contact stage are proposed, which make it possible to calculate the dust collection efficiency of the contact stages, as well as the overall efficiency of the cyclone-vortex apparatus. The results obtained show the prospects of using devices of this design at heat power plants and other industries.

scholarly journals ELECTROPHORESIS IN THE TOTAL (CONSTANT AND ALTERNATING) ELECTRIC FIELD. II. PECULIARITIES OF THE COMBINED IMPACT OF ALTERNATING AND CONSTANT ELECTRIC FIELDS

2020 ◽  
Vol 30 (4) ◽  
pp. 46-51
Author(s):  
B. P. Sharfarets ◽  
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Constant Electric Field ◽  
Electrokinetic Phenomena ◽  
Alternating Electric Fields ◽  
Alternating Electric Field ◽  
Electroacoustic Transducer ◽  
Dispersed Medium ◽  
Hydrodynamic Field ◽  
Combined Impact

The hydrodynamics of electrophoresis under the simultaneous impact of constant and alternating electric fields is considered. It has been shown that when the constant and alternating external fields are combined, the energy of the constant electric field is transferred into the alternating hydrodynamic field. An example is given of a dispersed medium in which a giant dispersion of the dielectric constant can arise, which in turn can contribute to an increase in the total electrophoresis rate. Analogies of the behavior of the considered dispersed medium with the action of an electroacoustic transducer based on the use of electrokinetic phenomena are given.

scholarly journals Enhancement of Cathode Dust Collection and its Application in Improving the Efficiency of Dry Electrostatic Precipitator

2020 ◽  
Vol 4 (5) ◽  
Author(s):  
Wei Wang ◽  
Zhonghao Wu ◽  
Xunqing Xu ◽  
Biao Xie
Keyword(s):  
Flue Gas ◽  
Air Pollutants ◽  
Power Plants ◽  
Electrostatic Precipitator ◽  
Collection Efficiency ◽  
Emission Standard ◽  
Dust Collection ◽  
Cathode Structure ◽  
Wet Esp ◽  
Dust Collection Efficiency

As the main equipment of flue gas dedusting in coal fired boiler, electrostatic precipitator (ESP) can meet the requirements of emission standard for air pollutants from coal-fired power plants through improving the efficiency of ESP and combining with desulfurization system while not installing wet ESP (WESP). This paper introduces the modifications of ESP cathode structure to improve the efficiency of dust collection by reducing the secondary dust loss at cathode. The application of cathode dust collection provides a reference for the improvement of ESP dust collection efficiency.

Characteristics on High Temperature Particulate Clean Up in a Pilot Scale Vitrification Plant

2003 ◽  
Author(s):  
S. C. Park ◽  
T. W. Hwang ◽  
J. H. Ha ◽  
H. S. Kim
Keyword(s):  
High Temperature ◽  
Pressure Drop ◽  
Collection Efficiency ◽  
Pilot Scale ◽  
Initial Time ◽  
Dust Collection ◽  
Filter Surface ◽  
Ceramic Candle Filter ◽  
Face Velocity ◽  
Dust Collection Efficiency

Characteristics of high temperature filter system were evaluated and the operation parameters were identified through a series of tests by the ceramic candle filter elements. At the first time of the tests, the trend of the pressure drop across the filter was increased sharply. But due to the growth of dust cake on the surface of filters it became stabilized to a certain level soon. The pressure drop was increased by the face velocity strongly. The permeability of the filter element decreased rapidly in the initial time but because the deposition and it also became stable as time goes on. Dust collection efficiency of the filter was higher than the designed value of 99.9%. Dust cleaning of the filter surface was effective under the back flushing pressure range of 1 to 5 bar. Finally, at the long-term vitrification test, no specific defect or failure were occurred to the ceramic candle filter. Based on the test results, the performance and durability of the ceramic candle filter was proved as sound.

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