Key Features
Porous burner
Porous
burners
emit
due
to
the
extremely
high
surface
temperature
more
infrared
radiation
than
conventional
radiation
burners.
As
the
heat
transfer
through
thermal
radiation
is
higly
efficient,
porous
burner
are
the
ideal
solution
for
applications
which
necessitate
fast
and
homogeneous
heating.
Porous
burners
can
be
designed
to
comply
with customer requirements and are therefore suitable for a wide range of applications.
The
utilization
of
porous
burners
increases
productivity
and
quality
while
simultaneously
reducing the specific energy consumption.
The
excellent
controllability
of
porous
burnes
increases
the
efficiency
of
production
plants
and
reduces
the
CO-
nd
NOx-emissions.
Problems
that
might
result
from
high
exhaust
gas velocities, when conventional combustion technologies are applied, can be avoided.
Porous
burners
can
be
operated
with
natural
gas,
LNG,
biogas,
methane,
ethane,
propane, butane, weak gas and hydrogen/methane mixtures.
Application examples
Porous burner technology
The
flameless
combustion
concept
of
a
porous
burner
is
based
on
the
reactions
of
a
fuel
gas/air
mixture
that
occur
in
porous
media.
A
premixed
fuel
gas/air
mixture
passes
a
flame
trap
before
reacting
in
the
combustion
zone.
The
hot
flame
transfers
heat
convectivly
to
the
porous
material,
which
contributes
by
heat
conduction
and
thermal
radiation to the intensive heat exchange within the combustion zone.
The
temperature
of
the
combustion
zone
reaches
up
to
1350
°C
and
emits
a
high
amount
of
the
combustion
reactions
as
infrared
radiation.
The
wavelength
of
the
maximum
radiation intensity depends on the surface temperature and varies from 1,8
m – 2,7
m.
The
porous
burner
technology
therefore
differs
fundamentally
from
other
combustion
technologies, which rely upon a flame stabilised in free space.
Characteristic properties in radiation mode
Specific heat:
100 - 2000 kW/m²
Specific radiation power:
75 - 400 kW/m²
Maximum radiation efficiency:
ca. 47 %
Air excess ratio:
1,3 - 2
Surface temperature:
800 °C – 1350 °C
Furnace temperature:
< 1000 °C
Time to reach maximum temperature:
< 30 s
o
high infrared radiation output
o
low NOx and CO emissions
o
high combustion stability
o
high specific power up to 2 MW/m²
o
high turn down ratio 1:10
o
low exhaust gas velocity
o
controllable surface temperature
Issendorff Thermoprozesstechnik e.K. I Adalbert-Stifter Str. 13 I D-91054 Erlangen I info@-tpt.de I USt-IdNr.: DE 268 299 066