World 1st On-line Water Flushing of Spiral-wound Heat Exchanger Successful at ZRCC
World
1st
On-line
Water
Flushing
of
Spiral-wound
Heat
Exchanger
Successful
at
ZRCC
On
February
6,
the
initial
on-line
water
flushing
test
for
the
spiral-wound
heat
exchanger
of
3000KTA
diesel
hydrotreating
unit
(DHTU)
of
ZRCC
achieved
successful
result,
which
marked
a
ground-breaking
moment
in
on-line
water
flushing
of
this
kind
of
equipment
in
the
world.
This
spiral-wound
heat
exchanger
of
3000KTA
DHTU
is
the
first
application
of
this
kind
of
equipment
in
China,
and
was
put
into
service
in
June,
2011
with
total
heat
transfer
area
of
2218
m2
and
total
weight
of
129.44
ton.
Being
affected
by
long
term
operation,
the
heat
transfer
efficiency
of
this
equipment
was
decreasing,
and
the
unit
had
to
lower
the
feed
to
maintain
the
operation.
Since
the
heat-exchanger
can’t
be
dismantled
to
be
flushed
and
maintained
due
to
its
integral
configuration,
ZRCC
technicians
injected
the
condensate
(with
temperature
around
80℃)
directly
to
the
tube
side
for
flushing
without
unit
shut-down
based
on
simulation
calculation.
After
two
days
flushing,
the
heat
transfer
efficiency
recovered
to
its
normal
level.
Information source：
2013-02-20