How many types of water tube boilers are there?
There are three primary types of steam drums found in water tube boiler systems: single steam drum, bi-drum, and multi-drum. The bi-drum design is often employed in industrial boilers for both power generation and process steam production due to its reliable pressure containment and ease of maintenance. 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 fire. Fuel is burned inside the furnace, creating hot gas which boils water in the steam-generating tubes.Common watertube boiler components such as the steam drum, downcomers, risers, mud drums, furnace walls, headers, and superheaters, will be discussed.A boiler’s water drum, particularly one mounted low on the boiler so as to keep mud from circulation.In an A-type water tube boiler, water fills the space between the drums, with the furnace positioned at the center. These boilers can be fired by coal or oil and feature multiple fire doors for stoking.
What is the working principle of boiler?
Working Principle of a Boiler Hot gasses are formed by burning fuel in the furnace. These glasses are made to come in contact with the water vessel, the point where the heat transfer takes place between the steam and water. Thus, the boiler’s basic principle is to convert water into steam with heat energy. There are two major types of tube boilers: water-tube boilers and fire-tube boilers. In water-tube boilers, water circulates inside the tubes and is heated externally by hot gases generated by the furnace.
What is a water tube boiler used in ships?
Marine and shipping industry: Watertube boilers are used to produce steam for marine propulsion and power generation on ships and submarines. District heating: Watertube boilers are used to produce steam for district heating. District heating is a system that delivers heat to multiple buildings from a central plant. Watertube boilers are safer by design and generally can operate many years longer than firetube boilers. Watertube boilers are available in larger capacities and recover faster than firetube boilers.Boilers can be broadly classified as shell tube and water tube boilers. Shell and tube boilers are also referred to as fire tube or smoke tube boilers. Fire tube boilers; contain long steel tubes through which the hot gasses from a furnace pass and around which the water to be converted to steam circulates.
What is the principle of water tube 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 fire. Fuel is burned inside the furnace, creating hot gas which boils water in the steam-generating tubes. The highest pressure water tube boilers can reach temperatures of ~600°C. Typical water tube boilers will generate steam at around 110-150°C. OAB units are available in temperatures up to 1300°C.Ideal boiler pressure is around 12 psi cold and up to 20 psi when heating; above 30 psi risks seal failure, while too low can stop heating and hot water. High pressure can trigger safety valves and shut down the boiler; low pressure is often caused by leaks or faulty components.
What is the capacity of a water tube boiler?
The capacity of the water-tube boiler can range from 5 to 120 t/h of steam, with an operating pressure of between 0. The boiler can also be used in hot-water systems. The number of tubes within a boiler ranges from hundreds to thousands within a single boiler, depending upon the size and design of the boiler.