Experimental Investigation of Sulfur and Nitrogen Oxide Emissions and Corrosion Propensity During the Combustion of Coals and Biomass Fuels
Combustion Science and Technology,
Год журнала:
2024,
Номер
unknown, С. 1 - 23
Опубликована: Авг. 20, 2024
The
increasing
use
of
biomass
in
Indonesian
coal-fired
power
plants,
mainly
through
co-firing,
presents
challenges
due
to
different
fuel
characteristics,
which
can
affect
gas
emissions,
ash
deposition,
and
combustion
efficiency.
This
study
assesses
flue
emissions
(SO2
NOx)
corrosion
tendencies
various
types
coal.
begins
with
characteristic
testing
analysis
coal
samples,
including
proximate,
ultimate,
calorific
value
analyses,
determine
their
suitability
as
fuels.
Preliminary
calculations
predict
deposit
formation,
followed
by
laboratory-scale
experiments
using
a
DTF
assess
characteristics.
results
show
that
sulfur
is
converted
the
phase
up
99%,
while
coal,
it
95%
at
high
temperatures.
NOx
levels
are
primarily
affected
nitrogen
contents
fuels;
for
instance,
Coal-B
0.88
wt%
produces
less
than
solid
recovered
(SRF)
refused
derived
(RDF)
1.73
1.51
wt%,
respectively,
yet
still
generates
higher
other
three
types.
In
general,
wood
chips
(WC),
rise
husk
(RH),
palm
kernel
shell
(PKS)
emit
30–80%
compared
However,
deposition
indicate
PKS,
SRF,
RDF
exhibit
dominance
albite
(NaAlSi3O8)
mineral
phase.
Additionally,
chlorine
content
SRF
(0.544
wt%)
(0.224
leads
formation
sticky
deposits,
potentially
impact
heat
transfer
surfaces.
These
findings
contribute
identifying
suitable
both
co-firing
or
dedicated
plants.
Язык: Английский
Studies into Ash Deposition Propensities in the Vicinity of Economizer and Air Preheater of Coal-Fired Power Utility
Combustion Science and Technology,
Год журнала:
2024,
Номер
unknown, С. 1 - 24
Опубликована: Окт. 22, 2024
Coal
is
still
massively
utilized
as
a
main
fuel
in
several
countries
for
power
plants
or
steel
industry.
However,
global
coal
reserves
currently
are
dominated
by
low
quality
coal,
having
calorific
values
lower
than
25.52
MJ/kg
and
containing
high
alkali,
sulfur,
ash
content,
that
can
promote
deposition
problems.
The
objective
of
this
study
to
investigate
selection
steam
focusing
on
risks
the
vicinity
economizer
air
preheater,
approximately
at
400°C.
This
has
two
evaluations
covering
original
coals
with
highest
risk
using
additive.
obtained
from
Kalimantan,
Indonesia,
which
coded
MH,
BE,
ES,
SG,
AD.
According
result
characteristic
test,
ES
contain
Na2O
SG
contains
while
AD
MgO
content.
first
evaluation
show
deposit
risk,
reflected
drop
tube
furnace
(DTF)
combustion
test
rate
(0.1424
g/h)
more
melting
spots
found
probe
surface.
Ash
particle
observations
x-ray
diffraction
(XRD)
scanning
electron
microscope
–
energy
dispersive
spectroscopy
(SEM-EDS)
also
presence
Na-based
minerals
elements
particles.
In
second
evaluation,
MgO-based
additive
was
added
obtain
ES-A
(ES
0.05
wt%
additive)
ES-B
0.10
additive).
DTF
shows
addition
reduce
indicated
fewer
Na
particles
ES-B,
so
dosage
promising
mitigating
ES.
It
worth
noting
conducted
laboratory
scale
pays
attention
parameters
according
real
conditions.
Therefore,
further
testing
pilot-scale
may
be
recommended
before
these
findings
implemented
plant.
Язык: Английский