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◎. 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 service.
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 theΦ219 or Φ273 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 sludge.
f. Blow down valve — to be used for draining off the boiler’s 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 steel plate.
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