Flue gas condenser
ECOcond

flue gas condenser for dust reduction and efficiency optimisation

The HERZ ECOcond flue gas condenser is an additional stainless-steel heat exchanger that can be connected to the boiler’s flue pipe. The flue gas condenser consists of water-surrounded tubes through which the flue gases flow. To achieve a separation efficiency of up to 50%*, a tube-spring system is installed that sets the exhaust flow into a rotational movement. These turbulators extend the path the flue gas travels within the heat exchanger. As the gas cools (exhaust temperature below the dew point), condensate forms, which binds the dust present in the flue gas.
The turbulators are mounted on a movable linkage. A motor moves the turbulators vertically, cleaning the flue gas condenser. In addition to mechanical cleaning, water is periodically sprayed into the condenser to enhance the cleaning effect. The water connection must be provided on-site. A connection to the drainage system is also required. The rinse water and condensate can generally be discharged safely into the sewage system—although in cases of high condensate volume, some municipalities may require a neutralization system.
To guide the entire flue gas mass flow through the condenser, the boiler’s induced-draft fan is mounted at the flue gas outlet of the HERZ ECOcond. This means that no additional fan is required.

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Advantages HERZ ECOcond

  • Fuel savings of up to 10% thanks to condensing technology*

  • Dust separation efficiency up to 50%*

  • Increase in the overall efficiency of the system
  • Suitable for new installations as well as for retrofitting existing systems
  • Automatic cleaning of the heat exchanger surfaces
  • Heat exchanger made of stainless steel (1.4571) – corrosion-resistant and acid-resistant ➠ DURABILITY
  • Easy installation thanks to compact design, minimal piping required
  • Low power consumption
  • No disposal costs for ash compared to an electrostatic filter. The condensate and rinse water from the ECOcond can (in most cases) be safely discharged into the sewer system – although some municipalities may require a neutralization system if the condensate volume is high.
  • Efficiency optimization – improved partial-load performance ➠ resulting in fuel savings & protection of the system (fewer start-stop cycles)
  • Optimized system runtime – increased efficiency during partial-load operation
  • The separation efficiency of an electrostatic filter is often tied to full-load operation. As a result, no separation is possible during the start-up or burn-out phases. The design of the HERZ ECOcond allows for efficient separation even during partial-load operation, as well as during the start-up and burn-out phases.
  • The flue gas temperature of the ECOcond after the filter is only about 5 °C above the return temperature! In comparison, the flue gas temperature in an electrostatic filter must be kept high (>120 °C) to prevent condensation. This energy is therefore lost in an electrostatic filter. With the HERZ ECOcond, however, it can be additionally utilized for heating purposes.

*depending on operating conditions (flue gas temperature, flue gas mass flow, system temperature, fuel, etc.)

Beispiel HERZ ECOcond