Natural circulation is caused by the density difference between saturated water and heated water partially filled with steam bubbles. In a natural circulation unit the water tubes are connected to a loop, Fig. 4.3.Heat is applied to one leg, called the raiser tube, where the water–steam mixture flows upward.
2020-3-1 · There are different components present in feed water and steam circuit of boiler and we should know some essential components of these circuit and these are Economizer, boiler drums, water tubes, and super heater. EconomizerEconomizer is a heat exchanger which takes heat from the flue gas, and increases the temperature…
Steam/water circulation design - KTH. 2003-10-30·Steam Boiler Technology eBook Espoo 2002 Steam/Water Circulation Design Sebastian Teir, Antto Kulla Helsinki University of Technology Department of Mechanical Engineering oil, natural gas and biogases.
2020-1-21 · ensures flow of a boiler in which water is input at one side, and steam is extracted from the other side of the flow path) Forced circulation boiler the circulation is achieved by a circulation pump Natural circulation boiler the circulation is achieved by the difference in density of the heated water in the boiler causing convection currents
A paper on different types of boiler and their circulation system
The primary purpose of a steam-generating boiler is to make steam to generate electricity. Super-heated steam comes from a boiler to a turbine and turns the turbine blades to create electricity. How water enters and leaves a boiler is called the boiler and steam circulatory system. The pipes and tubes that make up …
Circulation refers here to the flow of water, steam, or their mixture around the steam—water circuit in a boiler. In early days of boilers, steam was generated in a large vessel. The vessel was heated from outside, which would create a convective current within the large body of water.
2020-1-28 · versus the "classic" fire-tube Steam Boiler THE PRINCIPLE IN THE FIRE-TUBE STEAM BOILER, is that from the surface of a large volume of feed water, steam is evaporated. This boiling process is heated by the wall of the combustion chamber (the radiant part) and by the exhaust gasses passing through a bundle of so-called fire-tubes or smoke-tubes
2020-3-1 · Steam stop valve – regulates the flow of steam that is produced in the boiler to the steam pipe, and may also be used to stop the supply of steam from the boiler Fusible plug – placed at the lowest level of water and above the combustion chamber, its function is to extinguish the fire as soon as the water level in the shell of the boiler