Table of Contents
What is the process of a fire tube boiler?
A fire-tube boiler is a type of boiler in which hot gases pass from a fire through one or more tubes running through a sealed container of water. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam.
What is fire tube boiler with example?
Since fire is inside the tubes and hence it is named as fire tube boiler. The heat from the hot gases is conducted through the walls of the tube to the water. The examples of the fire tube boiler are the simple vertical, Cochran, Lancashire, Cornish, Locomotive, Scotch marine, and Velcon boiler.
How are the water tube and fire tube boiler constructed?
The entire arrangement is enclosed in an Ironed structure (welded steel drum). The water tubes are inclined at an angle of 15°. This boiler is made of steel shell whose both ends are welded. A water level indicator, pressure gauge, safety valve, and manhole are the mountings used.
How do boiler tubes work?
A Conventional Fire Tube Design In a conventional fire tube boiler, the hot gases move from the firebox into heating tubes immersed by water in the tank. As the walls of the tubes are heated by the gas, the heat transfers into the water, eventually converting the hot water to steam.
Where is fire tube boiler used?
Fire-tube boilers have the advantage of being easy to install and operate. They are widely used in small installations to heat buildings and to provide power for factory processes. Fire-tube boilers are also used in steam locomotives.
What is water tube process boiler?
A high pressure watertube boiler (also spelled water-tube and water tube) is a type of boiler in which water circulates in tubes heated externally by the fire. Fuel is burned inside the furnace, creating hot gas which boils water in the steam-generating tubes.
Why blowdown is provided in a boiler?
Boiler blowdown is the removal of water from a boiler. Its purpose is to control boiler water parameters within prescribed limits to minimize scale, corrosion, carryover, and other specific problems. Blowdown is also used to remove suspended solids present in the system.
What is difference between water tube and fire tube boiler?
The firetube boiler passes combustion gas inside a series of tubes surrounded by water in a vessel to produce steam, while a watertube instead sends water through a series of tubes surrounded by combustion gas used to transfer heat energy and produce steam.
What material is used for fire tube boiler?
Some of the most frequently used steels for boiler tubes include low-alloy steels containing alloying elements such as chromium, nickel, molybdenum, and vanadium, 9–12% chromium steels, austenitic stainless steels, austenitic heat-resisting steels, and nickel-base heat-resisting alloys.
What is mud drum?
A cylinder-shaped sump, located beneath the boilers. The mud drum was meant to collect sediment from the boiler water. The sediment of raw river water settled in the mud drum and periodically was discharged overboard by opening a valve.
Which type of fuel is used in fire tube boiler?
Fire tube boilers can use fuel oil, gas or solid fuel in their operations.