In order for a boiler to convert water to steam, a fuel source must release its energy in the form of combustion in the boiler furnace. Fuel systems play a critical role in the performance of a boiler. The most commonly used fuels in power boilers are natural gas, fuel oil, coal, and wood (biomass).
· PDF fileBoiler Fuel Firing System. COMBUSTION • Everywhere, at all times, oxygen combines with other elements. This general process is called Oxidation • Burning,g, , p or Combustion, is a special form of oxidation: - Oxygen combines rapidly with certain types of fuels, such as coal, oil, gas or wood, and substantial amounts of heat are liberated. • The Degree of Flammability depends on how easy it is to …
· PDF filefuel oil as a backup fuel. A system designer should be aware of a couple of key points when in-volved with boiler fuel oil systems. 1) Most boilers firing fuel oil will have their own fuel oil pump. 2) This pump can typically handle a low suction pressure of 15‖Hg without difficulty but a high suc-
Rotary or spinning cup jet boiler fuel oil atomizers Figure below shows the arrangement in principle. It consists of a motor driven fan, metering pump and fuel cup. The fuel cup which rotates at 70 to 100 rev/second is supplied with oil at low pressure (1.7 to 4.5 bar) from the metering pump which is used to control the throughput.
- Fuel oil supply system – This system supplies the fuel from the service tank to the diesel engine. The system consists of: a supply flow meter, supply pumps, circulating pumps, preheaters, the final filter, a viscosity controller, a FO venting box. The pressurised system is preferable while operating the diesel engine on high viscosity fuels.
This Marine Steam Boilers Heavy Fuel Oil System is designed to supply two oil fired marine steam boilers with Heavy Fuel Oil for normal operation and Diesel Oil for the start up procedure when no steam is available for fuel oil heating.
Marine boiler fuel oil supply system : Marine boilers currently burn residual low-grade fuels. This fuel is stored in double-bottom tanks from which it is drawn by a transfer pump up to settling tanks. Here any water in the fuel may settle out and be drained away.
The legal difference between diesel and heating oil in the United States is sulfur allowance. Diesel for machinery and equipment must be below 15ppm sulfur content while heating oil must be below 500 ppm sulfur. This means that the two can often be successfully interchanged for heating or boiler systems.
All boiler systems employ a fuel mechanism which basically comprises of the apparatus needed to supply fuel for heat generation. The design of the apparatus in use varies according to the kind of fuel employed in the system. Variety of fuels is available for application in boilers, each having different chemical properties.
With this boiler the fuel-firing system is an integral part of the boiler and boiler design. A coal-feed device is fitted to which fuel may be delivered either mechanically by means of a screw conveyor from an overhead fuel bunker, or pneumatically from a coal storage area located at or below ground level. The fuel can be delivered from any direction, giving complete flexibility of boilerhouse design. With the …