0
Boiler have minimum pressure 28 bar as per. Indian boiler act.so p c xan not call a boiler
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
A design of a typical steam boiler for electric power generation?
In a Power generating plant, steam is produced in a boiler. The boiler is effectively a huge kettle. Generally a boiler has the following subassembly layout: high pressure water flow (>200 bar g, >250 DEG C) enters the economizer inlet headers and then thru the economizer heat exchange pipes to arive in the economizer outlet headers. Main role of the economizer is heat up the water. After the economizer the water runs thru the headers and heat exchange pipes of the evaporator. Here the water vaporizes in to steam. Steam then runs through the headers and heat exchange pipes of generally 2 - 3 superheaters. Between superheaters and after the last superheater is a water injection point to control the temperature of the superheated steam. This layout would be in case of drum boiler, used in small power plants (electric power output not more then 100MW). Now the drum is large barell on top of the boiler where water and steam are separated. In case of large MW rated power plants the boiled does not have a drum. I must also say that when a boiler has a drum it is called a multiple pass boiler. That means that water is circulated through the vaporizer in 2,3 or more cycles until is fully transformed in to steam. In case of large MW rated power plants water passes through the vaporizer only one time and is fully transformed in to steam. This type of boilers are called " once through" boilers or "Benson" type after the name of the inventor. Now to have a view about the actual layout of the heat exchange surfaces here are some facts : - furnace, wih burners, is place where the flame or fire is located. Here temperature is very high ( >900DEG C). Heat surfaces are superheaters. Main heat exchange is done through radiation. Professionals calls this heat exchanger as radiation superheater. - convective superheaters. Called like this because heat exchange is particularly by convective means. The flue gases are cooler here and this is an array of pipes that the flue gases washes them. As I mentioned earlier it can be 2-3 convective superheaters. Steam that comes out from superheaters is run through pipes to the turbine inlet valves. In large MW rated power plants, steam that comes out from the high pressure turbine body is reheated in the boiler. Reheaters are also heat exchange surfaces that are generally intercalated with the superheaters. After reheating the steam is run to the intermediate pressure turbine body. To continue with the heat exchange surfaces layout in boiler, flue gases after washing the superheaters and/or reheaters will wash the evaporator and then the economizer before actually exiting the boiler body. To recover as much heat from the flue gases, after exiting the boiler, flue gases are run through a rotarry or tube heat exchanger. Here, air that is fed to the burners is heted. This way remanent heat of the flue gases is put back in to boiler making it more efficient. So to summarize a boiler is made of ( in order of flue gases pass) : - furnace (radiation superheater, pipes are run by high pressure steam) - convective superheaters ( pipes are run by high pressure steam) - evaporator (pipes are run by a mixture of water and steam) - economizer ( pipes are run by water ) Unlike a huge kettle, modern boilers use tubes filled with water and steam. Contained within a furnace.
What Steam is to what?
Kettle
Who invented the electric kettle?
Which kettle do you mean? Or did you mean 'Who invented the kettle'? As with most cooking utensils, it is unlikely that a specific person 'invented' the kettle, since that sort of thing developed as necessary through the ages.
When was the electric kettle invented?
you tell me
How is steam formed?
steam is created by vaporisation of the water on the ground or in a kettle.
What is the uses of rice cooker?
what is the use of a kettle
Why the boiling point of water in pressure cooker high?
A pressure cooker minimizes the escape of fluids or air. The build-up of air and fluid increases the pressure inside the cooker, which also increases the boiling point. An open kettle allows the fluid and air to escape, heat is lost thus cooking time is longer.
Is this how you spell kettle?
Yes, that is the correct spelling of the word kettle.Some example sentences for you are:I will go and put the kettle on.We need to buy a new kettle.
What are some machines you use in everyday life?
toaster, kettle, tv, computer, phone, cooker
Is there any difference between the boiling point of water in a kettle and the boiling point of water in a bucket?
assuming both containers are at the same elevation, there in fact can be a difference. Boiling point is defined as "the temperature at which the vapor pressure of the liquid equals the environmental pressure surrounding the liquid" If the kettle were sealed or at least mostly sealed, as steam began to spew from the kettle spout, if it in fact filled the inside with enough pressure (more steam stacks up than is able to escape the kettle) the boiling point would in fact rise slightly. This idea is similar to why a person who quickly opens a pressure cooker will deal with a vicious explosion as the pressure inside the pot equalizes with the pressure outside of it, therefore water and steam essentially explode outwards.
Hot water boiler?
Kettle. Or you could use a saucepan over the stove if you've not got one.
What is more powerful a 3KW electric kettle or a 10000W electric cooker?
10,000W is more powerful as 1KW = 1,000W. However, that is with EVERYTHING switched on, on the cooker - all element's, grill and oven - also a single element on a cooker is NOT likely to be more than about 1,500W (1.5KW) so therefore a kettle would be a lot more powerful for boiling water for example, be more energy efficent for that, and do it a lot faster.
Why is there high pressure in the mantle?
If you imagine the world as a kettle of boiling water, standing on a lit gas ring. While the steam escapes through the spout, all is well. But if the spout and lid was to become blocked, the steam would create a growing pressure inside the kettle. Eventually, the kettle would burst and the pressure is suddenly released. A bursting kettle is like an erupting volcano, releasing some of the pressure that had built up below the mantle.
Product that is expected to be used for more than one year by the consumer?
Cooker. Refrigerator. Kettle. Toaster. TV. Radio. Computer. etc
Why steam comes out from a kettle sprout?
steam comes out to release the energy of the kettle because of the heat that it's producing
How much water can a kettle hold?
That will depend on the size of the kettle. They come in different sizes.
How is air pressure relative to sea level?
Air pressure is higher at sea-level, so a kettle will boil quickly. Air pressure lessens the higher one climbs, so a kettle will take a long time to boil on the top of Mount Everest.
