Detail: High Pressure Marine Steam Boiler with Water Level Gauge /
Water Level Controller
The furnace and smoke side of boiler tubes absorb the heat produced
by fired oil and transfer it to water, then the water will be
evaporated into steam. Steam rise up and enter the vapor space
because its specific gravity is reduced. The space left by steam
will be made up by water with a heavier specific gravity. This
process forms a natural steam-water circulation. When the water
level becomes lower because water is evaporated into steam
continuously, the feed water pump will feed water into boiler to
keep the water level in the normal range. This process continues
and steam will be produced continuously by absorbing the heat
produced by fired oil to heat water.
.Exhaust Gas Boiler
This series boiler is used for producing steam and hot water by
absorbing the exhaust gas heat from diesel engine, as to improve
the efficiency of diesel engine. So boilers operator should attach
importance to the exhaust gas boilers management and also should
familiar with the boilers structure and relevant system, should do
the daily maintenance, and make the boilers yield benefit.
Brief instruction to boilers structure
The boiler is a natural circulation vertical exhaust gas boiler
with smoke tube. It consists of boiler body, upper & lower
smoke chamber; exhaust gas bypass equipment and so on.
The boiler body is formed the drum by shell, plain end and lower
tube plate. Upper tube plate is inside the drum, the upper tube
plate is welded with lower tube plate by steel tube, the upper tube
plate is connected with plain end by smoke chamber plate. It is the
circular steam space outside of the smoke chamber, the flue is in
the above of upper tube plate, all smoke tubes are covered by
boiler water, smoke box is in the under of lower tube plate, and
the smoke box is connected with the exhaust gas bypass equipment.
There are many hand-holes under the shell. In view of the
convenience for checking & repairing boiler, manhole will be
installed on the boiler.
The steam inside the boiler can be transferred to outside by main
steam valve that is on boilers plain end. To insure boilers safety,
one or two-safety valve which can discharge total steam produced by
the boiler is installed on the plain end. Once boiler is running in
the abnormal condition and result in super-high pressure, steam can
be discharged from safety valve.
There are water level gauges on the above or under of steam-water
dividing surface of the upper of drum, and water level gauge can
indicate the water level all the time, its very helpful for boilers
operator to do supervision. In additional, at the same height
limit, there is one water level controller used for the
transmission of water level, and also can send all kinds of
electric sign to boilers controlling system according to the
different water level. According to these different electric sign,
controlling system can control the running of water pump, and send
The upper smoke box lies in the top of boiler. Exhaust gas from
boiler body discharge to chimney pass by upper smoke box.
The lower part is the inlet smoke box for exhaust gas. The exhaust
gas inlet nozzle will be connected with the main diesel engine on
the lower smoke box. On the smoke box, there is an inspection door
The thermometer and barometer that lies on the upper & lower
smoke box separately can indicate the temperature and resistance
force of exhaust gas as to supervise the boilers running status.
In order to reduce the heat loss and insure the safety of boilers
running, the outer surface of boiler body and upper & lower
smoke box are covered with thick 60mm insulation.
.Oil Fired Boiler
Light oil or heavy oil is suitable for this boiler plant. The
boiler can be used for heat supply, oil heating and daily life
Brief Introduction of Boiler Structure
The boiler body consists of boiler shell, furnace and pin tubes
with an all welded type structure. The pin tube being assembled
inside the219 or 273 smoke tube separately, consists of
closed-pitched columnar steel pins which are welded on the outside
surface of a steel tube. The boiler furnace is a full water cooling
furnace consisting of a cylindrical furnace and upper, lower end
which increases heat transfer efficiently.
The convection-heating surface of boiler consists of smoke tubes
and pin tubes. The high temperature smoke from furnace enters into
smoke tubes, flush the internal surface of smoke tubes and the pin
tubes at the same time, forming a high efficient convection-heat
exchange tube group.
The setting & function of boiler accessories
a. Main steam valve on the top of boiler, which can transfer the
steam from boiler to steam main pipe.
b. Safety valve on the top of boiler, which can discharge all the
steam at full load when the boiler is over pressure.
c. Water level gauge and water level controller on the steam-water
interface, which is used for boiler water level indication and for
the supervision by boiler operator. The water level controller is
used to transmit the value of boiler water level. The control
system will control the feeding water pump or do burner emergency
stop according to the signals received respectively.
d. Feeding water stop valves and check valves on the shell side,
one set for main feed water and another set for standby purpose.
e. Scum valve to be used for draining off the suspension of oil
f. Blow down valve to be used for draining off the boilers
deposition and dirt.
f. Gauge valves on the top of boiler, to be used for connecting the
instruments with steam inside the boiler.
g. Air vent valves to be used for discharge the air inside the
boiler when pressure is increased.
There are manholes and hand holes on the boiler shell in order to
maintenance the inside parts of boiler conveniently.
In order to decrease the heat loss of boiler and to low the surface
temperature of boiler, the outside surface of boiler should be
packed with insulation material and covered with thin galvanized
.Oil-Exhaust gas Boiler
This series boiler can produce steam only by firing oil or only by
using the exhaust gas discharged from main engine or using them at
same time. This boiler can be used for supply heat for auxiliary
boiler of ship, for heating the fuel oil, service for daily life.
Brief Introduction to Boilers Structure
This series boiler is a kind of vertical oil-fired & exhaust
gas composite boiler. The exhaust gas section absorbs gas afterheat
discharged by main engine; the oil-fired section absorbs the heat
by burning oil. The two sections lie in one cylindrical shell,
share one steam-water space, but their smoke gas sides are isolated
each other. So it means that this two sections can work separately
also can work at the same time, and this two running way all can be
automatically controlled by the control box.
This series boiler is a vertical cylindrical shell boiler, and
mainly made of following parts:
1.The upper consists of two parts, one is for discharging exhaust
gas, another is for discharging smoke gas of firing oil, the two
parts are isolated each other
2.The middle part is boiler body. The boiler body is a cylindrical
shell, on the top and the bottom of the body is upper tube plate
and lower tube plate respectively. For the inside of shell, one
side is heating surface of exhaust gas, another side is oil firing
heating surface which consist of uptake and combustion chamber (
furnace) , the burner is connected with the frame of fire hole on
the one side of furnace. It means the two heating surfaces are lies
in the same shell and share one steam-water space, but their gas
sides are isolated each other.
3.The lower part is the inlet smoke box for exhaust gas. The
exhaust gas inlet nozzle will be connected with the main diesel
engine on the lower smoke box. In order to measure the inlet gass
temperature, there is thermometer on the nozzle. On the smoke box,
there is an inspection door for overhauling. And a nozzle of wind
pressure gauge is placed on the outlet of exhaust gas, coordinated
to use for measuring the smoke gas resistance force of exhaust gas
section with the wind pressure gauge on the upper smoke box.
This boiler has the advantage of taking small space of engine room,
and is very convenient for central operating & controlling,
because oil-fired section & exhaust gas section of boiler share
one cylindrical shell.
In order to reduce the influence of accuracy of water level
indicator & water level controller because of the ships
inclination and wave, the boilers installation & orientation
should be in a way that the boiler axis running through the water
level indicators socket that is line with the ships centre-line or
parallel to it.
Model Number: According to the design and technical demand
Brand Name: KANGWEI
Payment Terms: T/ T, L/ C
Certification: ABS, BV, NK
Delivery Time: Negotiate
High Pressure Marine Steam Boiler with Water Level Gauge / Water Level Controller Images