Electrostatic precipitation technology is one of the major particle separating and collecting methods. Based on the most active research problems

we have reviewed the recent development and application of electrostatic precipitation technology. 1) The characteristics of coal

high-voltage power supply

and electrostatic precipitation（ESP）

sizing should all be optimized for ultra-low emission. The characteristics of particle

such as its shape

diameter

and resistivity

can affect dust collection. Resistivity of particle has a marked effect on collection

and it shows inverted U-shaped relationship with temperature. By calculating contents of lithium

sodium

and iron

humidity and electrical strength as well as the resistivity of fly ash released by combustion of Chinese coal can be predicted using Yan

&

Li model. 2) The ratio of PM2.5 and PM10 at the outlet of ESP is normally in the range of 6%

4

0%. This ratio can increase to 28%

6

0% at the outlet of downstream desulfurization devices for generation of secondary aerosols and collection of PM10. The PM2.5 emission at the ESP outlet is also related with rapping

and its concentration can be 6 mg/m3 higher during outage rapping than power-on rapping.3) The so-called ESP index

products of average

peak electrical strength

and specific collecting area

can predict the grade collecting efficiency and help ESP design. The value of ESP index should be higher than 1 300 for controlling the outlet emission under 10 mg/m3. 4) ESP index also indicates the higher electrical strength is

the better ESP performs. Therefore

the three-phase hig-voltage power supply can collect 10% more particle than single-phase one and keep its operating voltage near the peak voltage of single-phase power supply. 5) The front side of ESP should be available to cope with high dust load and the end of ESP should focus on preventing re-entrainment based on multi-sectionalization and differentiated power supply. Meanwhile

the operating temperature should be controlled under 130 ℃ for lowering dust resistivity and recovering heat. 6) For fine particle capture

the ionic wind produced by corona discharge

charging and agglomeration inside the pre-charger should both be considered. To lower the operating capital of ESP

fly ash can also be widely applied for high value application

such as waste gas and wat

er treatment or mineral geopolymer synthesis. The discussions and results are expected to indicate some trends of electrostatic precipitation technology development and contribute to this area.