percent less energy than traditional systems. Thus,
more than 30,000 euros per year can be saved on
natural gas costs, for example, in case of a batch
galvanizing plant with an average through-put
rate of 6 tons per hour.
While in conventional systems without RECU-
CHANNEL technology the waste gas collects at the
top, RECU-CHANNEL systems suck the waste gas
from below in a controlled way allowing the waste
gas to flow downwards past the outside surface
of the kettle wall. Thus the waste gas transfers to
the lower part of the tank exactly that amount of
energy that is required for the process.
The channels are arranged at both long sides
of the furnace extending along their complete
length. Thus the waste gas travels long distances,
giving it more time for the heat transfer. Using the
residual heat in the RECU-CHANNEL to preheat
the combustion air leads to a further increase in
furnace efficiency.
The result: While the waste gas temperature of
furnaces without RECU-TEC usually reaches 550 °C
or more, the waste gas temperatures of the new
furnaces are always below 400 °C, even in case of
full load operation. This is a clear indication that
the input energy is extremely efficiently used.
Highly efficient burner technology Each of the di