ReCyclone EH
Optimized cyclones with electrostatic recirculation

Recent adoption of electrostatic recirculation in the same cyclone system has successfully proven to further reduce particle emissions, even in the [1;5]µm particle size range, assuring future regulation compliance, particularly where legal limits are very tight, with the objective of bag filter redundancy.

A DC high voltage is applied in the concentrator, allowing the recirculation of very fin nanometric particles, more resistant to centrifugal forces, to the cyclone collector. 

After having been separated in the recirculator and concentrated in the recirculation flow, electrically charged fine particles are attracted by the cyclone walls, while agglomerating with larger particles entering the system, both promoting their easier capture. 

Since particles are not captured on the walls of the recirculator, contrary to ESPs, ReCyclone® systems avoid the problem of dust colmatation and condensation.

Additionally, ReCyclone® EH systems are also immune to either low or high dust electrical resistivity and the HV required power is only 10 to 15 % of that used in ESPs. Electrostatic recirculation for fine particle capture was the winner of the Portuguese Environmental Press Award in 2008 and nominee for the European Environmental Press Award 2008.


1. Air with fly ash from the boiler or from the pre-separator
2. Hurricane Cyclones. (Batteries of 2, 4, 6 or 8 units )
3. Rotary discharge valve
4. Collected particles
5. Cleaned Air
6. Electrostatic recirculators.
7. Recirculation fan
8. DC High Voltage

Note: supporting structure, insulation and ductwork are not represented
Glass and Ceramic Furnaces

Glass and ceramic furnaces are typically associated with emissions of very fine particles (< 5 µm) in combination with high temperatures and load. An increasingly higher number of furnaces are powered with biomass fuel, further raising the level of particulate emissions that need to be treated, in order to comply with stricter regulatory limits. Solving this problem may or not require a two stage dedusting system such a cyclone pre-separation system followed by an ESP.

Client's needs frequently include a very high efficient dedusting system, robust enough to operate at high temperatures and to handle glowing particles. 

Glass & Ceramic Furnaces
Glass & Ceramic Furnaces
Glass & Ceramic Furnaces
Glass & Ceramic Furnaces
Glass and Ceramic Furnaces | General Arrangement

The general arrangement of a Glass making industrial line typically includes a Natural Gas furnace followed by an ESP as the End Stage Deduster. Changing to biomass fuel increases the level of particulate emissions that need to be removed before the stack (< 5µm).

The solution for this cases needs to be a two stage dedusting system that uses in a first step a cyclone system to remove a large quantity of the particles and the glowing particles (Hurricane) and a second stage for the fines (ESP or ReCyclone System), so to comply with the more stringent emissions regulations.