Rehva Guidebooks

Electrostatic Precipitators for Industrial Applications

Beskrivning

An Electrostatic Precipitator is a device that collects particles from air or flue gas by electrostatic forces. he ESP’s discussed in this book are all for industrial processes. Indoor small units for purification of ambient air are not covered. In the early days ESP’s were developed for recovery of precious material, e.g. Cu, Ni and Zn. Environmental aspects are however the main focus today. This guidebook is aimed at the practising, consulting and contracting engineers. It provides basic knowledge of the physics and power supplies of Electrostatic Precipitators (ESP’s), practical aspects of ESP design, and examples of typical applications of ESP’s. ESP’s are characterised by low-pressure drop and very high capture efficiencies and very low power demand. They can be built for operation at high temperatures, 400 °C and above with help of special steel. Today’s environmental egislation requirements are specified as emissions in terms of e.g. mg/Nm³ of flue gas rather than collecting efficiency.

Extremely low emissions can be guaranteed for most ESP applications today. The future will see even lower emission guarantees and for many applications the ESP will remain as an important device for the removal of particulate from flue gases.