EKP Unit 2 - ANDRITZ Wet Electrostatic precipitator (WEST)

Wet electrostatic precipitator (WESP)

As for the dry ESP, the wet ESP uses electrical forces to remove particulate matter (PM) from flue gases. A high-voltage source generating a corona current charges the PM, which moves to the collecting plate. PM is removed from the plate by means of flushing water.

Advancements in ESP technologies from ANDRITZ over the past decade, more particularly with the development of switched integrated rectifiers (SIR) for ESP energizing, have provided continuous improvements in PM removal efficiency. As one of the oldest technologies applied in clean air technologies, especially when addressing acid mists, aerosols and hazardous air pollutants, a wide range of robust and reliable wet ESP designs are available from ANDRITZ for a variety of industrial and power generation applications.

EKP Unit 2 - ANDRITZ Wet Electrostatic precipitator (WEST)


The key features of ANDRITZ wet electrostatic precipitators are:

  • Ultra-low outlet PM emissions as low as 0.5 mg/Nm3 and SO3 emissions below 1 ppm
  • Removal efficiencies of up to 99%
  • Can be adapted to small or moderate volumetric flows of flue gas
  • Industrial and electricity generation applications, with over 80 references worldwide
  • Can be used as “polishing” APC equipment to control acid mists, submicron PM (as small as 0.01 μm), mercury, metals, and dioxins/furans
  • Horizontal and vertical designs
  • 4th generation of switched integrated rectifiers (SIR) as high-frequency power supply and/or integrated ESP control systems for conventional transformer rectifiers (T/R), both with energy optimization algorithms (EPOQ, power down rapping, …)
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  • HIGH FREQUENCY POWER SUPPLIES - Electrostatic Precipitators PDF : 398 KB
  • ANDRITZ Clean Air Technologies brochure PDF : 9.2 MB