Materials,
Journal Year:
2024,
Volume and Issue:
17(19), P. 4919 - 4919
Published: Oct. 8, 2024
In
this
work,
we
attempt
to
explain
the
phenomenon
of
sulfur
corrosion
power
boiler
water
walls
under
conditions
large
fluctuations
in
carbon
monoxide
concentrations.
To
assess
required
for
formation,
a
criterion
based
on
chemical
and
flow
field
parameters
flue
gas
is
proposed.
The
formulated
mixture
fraction
variance
turbulence
time
scale.
Numerical
modeling
coal
combustion
250
MW
performed
using
ANSYS.
Two
cases
are
analyzed,
with
first
simulating
operated
classic
high-swirl
burners
second
one
accounting
operation
modified
low-swirl
burners.
Calculations
pulverized
standard
k-ε
model
described
by
fraction.
simulation
results
reveal
that
burner
characterized
higher
values
frequency
fluctuation
velocity
field,
which
strongly
related
an
increased
rate.
study
outcomes
show
validity
determine
areas
at
risk
corrosion.
Applications in Energy and Combustion Science,
Journal Year:
2024,
Volume and Issue:
17, P. 100248 - 100248
Published: Jan. 4, 2024
Solid
fuels
are
relatively
inexpensive
and
widely
available,
making
them
an
attractive
option
for
energy
producers.
However,
they
currently
inefficient
in
converting
heat
into
electricity,
new
technological
advances
needed
to
make
more
efficient.
Plasma
ignition
stabilization
of
pulverized
coal
flame
provides
a
cost-effective
sustainable
approach
boiler
start-up
combustion
stabilization,
avoiding
the
traditionally
used
fuel
oil
or
gas.
This
technology
consists
heating
air-coal
mixture
with
electric
arc
plasma
temperature
devolatilization
partial
gasification
coke
residue.
Thus,
highly
reactive
two-component
fuel,
consisting
combustible
gas
residue,
is
obtained
from
original
coal.
In
this
paper,
comprehensive
thermodynamic
kinetic
analysis
was
carried
out.
A
out
study
optimal
parameters
flame.
Kinetic
modeling
process
made
it
possible
obtain
changes
temperatures,
velocities
concentrations
high-temperature
components
along
length
plasma-fuel
system.
experiments
on
thermal
coal,
stable
coal-dust
obtained,
its
temperature,
composition
degree
carbon
were
determined.
Comparison
experimental
calculated
data
showed
satisfactory
agreement.
A
techno-economic
analysis
is
performed
on
the
negative
CO2
emission
gas
power
plant
(nCO2PP)
vs
combined
cycle
turbine
(CCGT)
with
carbon
capture
and
storage
(CCS).
In
nCO2PP
it
can
be
distinguished
following
three
islands:
fuel
preparation,
generation
separation
capture,
respectively.
The
CCGT
CCS
are
modeled
in
commercial
software.
amine
has
been
used
as
reference
to
represent
state-of-the-art
technology.
Both
CAPEX
OPEX
well
incomes
from
sewage
sludge
disposal
avoided
emissions
have
included
analyses.
boundary
of
cost
analyses
includes
plants,
processes
conditioning.
results
show
that
levelized
electricity
(LCOE)
using
exhaust
gasifier
comparable
capture.
Due
high
electrical
energy
consumption
equipment
cost,
LCOE
much
higher
when
plasma
used.
strongly
depends
income
emissions.
Further
reductions
expected
for
development
technology
maturity.
Горение и Плазмохимия,
Journal Year:
2024,
Volume and Issue:
22(1), P. 27 - 36
Published: March 25, 2024
A
plasma-coal
burner
is
studied
utilizing
a
model
of
plasma
thermochemical
preparation
coal
for
combustion,
implemented
in
the
PlasmaKinTherm
program.
For
boiler
start-up
and
combustion
stabilization,
burners
do
not
require
fuel
oil
or
gas.
The
program
combines
thermodynamics
kinetics
to
describe
volume.
purpose
simulation
was
determine
conditions
ignition
low-grade
coal.
numerical
study
carried
out
influence
plasmatron
power
on
air
mixture
(coal
+
air).
High-ash
Ekibastuz
used
calculations.
distributions
temperature
velocity
gas
particles
concentrations
products
along
length
were
calculated.
As
result
analysis
processes
coal,
their
main
patterns
revealed,
including
shift
maximum
temperatures
velocities
upstream
(towards
torch),
as
well
fact
that
values
depend
plasmatron.
At
determined
by
kinetic
modeling,
experiments
conducted
test
validate
highly
reactive
two-component
torch.
assumptions
made
during
development
mathematical
confirmed
comparing
calculations
with
experimental
data.
Combustion Science and Technology,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 25
Published: June 12, 2024
Combustion
states
of
char-S
(C14H16O4S)
and
char-N
(C18H19NO3)
sub
function
molecules
in
a
limited
number
oxygen
environments
pyrolysis
at
high
temperatures
were
examined
quantum
mechanically.
In
the
study,
formation
all
gases,
with
or
without
carbon,
determined.
All
dynamics
which
O2
molecule
could
be
effective
combustion
mechanism
elements
that
affect
decomposition
event
The
disappearance
highly
stable
CO
CH2O
(formaldehyde)
shown
detail.
It
has
been
is
catalysis
can
bond
hydrocarbon
groups
decompose
them
into
small
temperature.
this
it
was
temperature-dependent
vibration
rotational
energies,
H-atom
transfers
play
role
system,
aromatic
carbon
ring
group
last
particle
to
decompose.
addition,
dissociation
sulfoxylic
acid,
thioformic
hydrogen
sulfide
originating
from
Char-S
as
well
conditions
cyanide
pyridinyl
Char-N
study
also
showed
since
N-atom
located
ring,
makes
emergence
nitrous
oxide
difficult
systems.
Research Square (Research Square),
Journal Year:
2024,
Volume and Issue:
unknown
Published: March 25, 2024
Abstract
The
application
of
Semi
Autogenous
Grinding
strategy
in
mineral
beneficiation
engineering
is
well
defined
and
established
unit
operation
that
qualified
for
liberation
valuable
final
products
from
various
rock
ores
kinds.
TENCAN
GQM
series
Ball
Mill
equipment
was
deployed
throughout
our
investigation
to
learn
on
optimum
setting
factors
are
crucial
achieving
effective
product
quality
outcome
during
coal
beneficiation.
Therefore,
a
Semi-autogenous
grinding
methodology
five
(5)
different
samples
into
stream
ranging
particle
size
below
[−600μm,
+38μm]
through
an
optimized
procedure
syndicate
three(3)
control
parameters
being
the
{A
−
powder
filling
(fc),
B
ball
loading
(JB)
C
residence
time
or
duration
(t)}.
Moreover,
analyse
kinetics
interaction
produce
mass
recovery
at
desirable
specification
relevant
specific
manufacturing
industry.
However,
initially
sample
material
acquired
characterized
via
three
spectroscopy
techniques
{x
–
ray
diffraction
(XRD),
x
fluorescence
(XRF),
scanning
electron
microscopy
(SEM)},
establish
contrast
each
composition,
morphology,
hardness,
relative
abundance
occurring
species
entrenched
within
structure
(inorganic
matter).
Hence
using
Proximate
testing,
Ultimate
petrography
analysis
examination
possible
type
collected.
were
collected
assorted
sizes
classification
grouped
as
run-of-mine
coals
(−200mm),
Cobbles
(−75mm,
+40mm),
Nuts
(−40mm,
+25mm),
Peas
(−32mm,
+14mm)
fines
(−14mm)
according
laboratory
sieve
specifications.
subjugated
hardness
testing
Hardgrove
grindability
Index
device
reported
variable
index
value
with
increased
(60.37),
(64.58),
ROM
(66.84),
Fines
(66.99)
(67.37)
which
relatively
soft
compared
other
samples.
Process
engineers,
researchers
students
organizations
studying
metallurgy
etc.,
must
be
informed
about
affecting
preparation
innovations
health-safety
risk
encounter
by
engineer
personal
handling
processing.
production
efficacy
significantly
improved
adopting
model
functions
accurately
increase
lower
power
rating
cumulative
path
hence
relevantly
reducing
cost(s)
exacerbated
tedious
unnecessary
methods.
Research Square (Research Square),
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 10, 2024
Abstract
The
application
of
Semi
Autogenous
Grinding
strategy
in
mineral
beneficiation
engineering
is
well
defined
and
established
unit
design
method
that
qualified
for
liberation
valuable
quality
products
from
numerous
rock
ores
metals,
coal
seam,
kimberlite
etc.
TENCAN
GQM
series
Ball
Mill
equipment
was
deployed
throughout
our
investigation
to
investigate
on
optimum
setting
factors
are
crucial
influential
achieving
effective
product
outcome
during
by
milling
operation.
Therefore,
a
Semi-autogenous
taken
advantage
the
grinding
activity
involved
five
(5)
different
samples
stream
particle
size
range
between
[−600μm,
+38μm]
researched
an
optimized
procedure
syndicate
three(3)
control
parameters
being
{A
−
powder
filling
(fc),
B
ball
loading
(JB)
C
residence
time
or
duration
(t)}.
Moreover,
understand
kinetics
dynamics
interaction
yield
mass
at
desirable
relevant
target
manufacturing
companies
profound
interest
study.
initially
acquired
sample
material
gently
prepared
using
splitter
equipment,
sieve
plates
composition
analysed
via
Thermogravimetric
machine
Proximate
results
were
acquired.
To
establish
contrast
amongst
samples,
compositional
formational
morphology,
hardness,
relative
abundance
occurring
species
as
key
influenced
comminution
patterns
obtained
trials.
Samples
collected
assorted
sizes
classification
fully
heterogenous
format
grouped
run-of-mine
coals
(−200mm),
Cobbles
(−75mm,
+40mm),
Nuts
(−40mm,
+25mm),
Peas
(−32mm,
+14mm)
fines
(−14mm),
scaling
laboratory
standard
specifications.
However,
subjugated
hardness
testing
Hardgrove
grindability
Index
device
reported
variable
index
value
with
increased
(60.37),
(64.58),
ROM
(66.84),
Fines
(66.99)
(67.37)
which
soft
compared
other
samples.
Process
engineers,
researchers
students
organizations
studying
metallurgy
etc.,
must
be
informed
about
affecting
preparation
innovations
health-safety
risk
encounter
engineer
personal
handling
processing.
production
efficacy
significantly
improved
through
adopting
model
functions
accurately
increase
recovery
lower
power
rating
cumulative
path
hence
relevantly
reducing
cost(s)
exacerbated
tedious
unnecessary
approaches.
