This is a technical solution used in the reconstruction of existing electrostatic precipitators, which consists of using the first section or sections of the existing electrostatic precipitator to pre-separate coarser dust particles and to balance the flow with subsequent installation of a bag filter in the remaining sections. This solution is used especially where it is a matter of separating solid pollutants with an abrasive character and at high input concentrations, ie especially behind energy boilers and rotary kilns.

The advantages of this solution compared to the simple reconstruction of the electrostatic precipitator

  • The minimum necessary modifications to the existing filter construction and the usage of the existing cabinet will ensure that the investment costs for the reconstruction are minimized.
  • Increasing efficiency and reducing the output concentration of solid pollutants, especially the concentration of fine particles, which can be achieved even when the electrical section is turned off.
  • Better stability of operation, when there is no accidental short-term increase in the output concentration of solid pollutants due to fluctuations in operating parameters.
  • When cleaning the gas behind the energy boilers, the high separation efficiency in the first section (80-90%) will allow the separation of the coarser ash fraction.