How much temperature of steam is required in water line placed in furnace of a boiler?

Answer 1

Power plants generate electrical power by using fuels like coal, oil or natural gas. A simple power plant consists of a boiler, turbine, condenser and a pump. Fuel, burned in the boiler and superheater, heats the water to generate steam. The steam is then heated to a superheated state in the superheater. This steam is used to rotate the turbine which powers the generator. Electrical energy is generated when the generator windings rotate in a strong magnetic field. After the steam leaves the turbine it is cooled to its liquid state in the condenser. The liquid is pressurized by the pump prior to going back to the boiler A simple power plant is described by a Rankine Cycle.

Water-tube boilers are used for high-pressure boilers. Fuel is burned inside the furnace, creating hot gas which heats up water in the steam-generating tubes. In smaller boilers, additional generating tubes are separate in the furnace, while larger utility boilers rely on the water-filled tubes that make up the walls of the furnace to generate steam. The heated water then rises into the steam drum. Here, saturated steam is drawn off the top of the drum. In some services, the steam will reenter the furnace in through a superheater in order to become superheated. Superheated steam is used in driving turbines. Since water droplets can severely damage turbine blades, steam is superheated to 730°F (390°C) or higher in order to ensure that there is no water entrained in the steam. Cool water at the bottom of the steam drum returns to the feedwater drum via large-bore 'downcomer tubes', where it helps pre-heat the feedwater supply. (In 'large utility boilers', the feedwater is supplied to the steam drum and the downcomers supply water to the bottom of the waterwalls). To increase the economy of the boiler, the exhaust gasses are also used to pre-heat the air blown into the furnace and warm the feedwater supply. Such water-tube boilers in thermal power station are also called steam generating units.

Answer 2

It might be the relief valve or the regulator is over pressuring the boiler. Check the water pressure in the boiler. If it is ok, turn off the power and water supply ,relieve the pressure in the boiler and drain it below the level of the T&P valve. Replace it with a relief valve rated for the boiler. Make sure the boiler in full of water and purged of air before it is turned back on. The pressur regulater/fill valve should be replaced if the pressure is too much. If the boiler is overheating call a pro now.

Answer 3

I hope you're looking for something simplified like the following: -

In a boiler, the water must be brought (by 'Sensible heat'), to
100 °C at atmospheric pressure in order to boil.

The steam produced is called 'Saturated (wet)' steam and has the same temperature as the water. However, much more heat energy has been added to vaporise the water. (Latent heat of Vaporisation).

If the pressure of the water (& steam) is increased, more heat energy must be added to maintain the boiling point.

For example: If the pressure is increased to 7 bar, the temperature of the water and its saturated steam would have to be increased to 170°C.

If the steam is separated from the water and further heated (Sensible heat), it would become 'Superheated steam'.

Answer 4

A boiler converts water into steam. The feed water is controlled by a float valve.

Answer 5

Dude,
your question makes no sense!! Sit down with a dictionary or something BEFORE you write a question. We'd help you if we knew what you were actually asking!

Answer 6

That question makes no sense

Answer 7

required for what?