What is Scotch Boiler?
The Scotch Boiler is a popular steam boiler used on ships, featuring small-diameter fire tubes and a horizontal cylinder shape. It works similarly to a fire-tube boiler, sending hot flue gases through tubes submerged in water. This boiler is an exact replica of the earlier Lancashire boiler, which was made up of several separate furnaces. The Scotch marine boiler structure consists of four furnaces with distinct combustion chambers and a smoke box connecting them to the chimney.
The boiler shell is made of steel plates bent into a cylinder shape and fastened together with rivets or welding. The boiler shell should have enough space to contain water and steam to protect internal parts. Scotch marine boilers are used in meritime applications, with the single-ended Scotch Marine Boiler having a small, spherical boiler shell with a maximum length of 3.5 meters.
The double-ended Scotch Marine Boiler promotes water circulation within the boiler by forming vertical Galloway tubes and reducing material stresses. The number of combustion chambers ranges from two to four at either end. Heat from the combustion chamber heats the water around it, which is then sent into the steam turbine when the water transforms into steam.
Despite their proven dependability and longevity, Scotch marine boilers have poorer steam creation and generation quality, cannot be used for large plants, require more floor space for output, and are difficult to manage for load variations. In conclusion, Scotch marine boilers are effective and adaptable in water circulation, combustion, and fuel sources, making them ideal for small or restricted plants.
