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Purpose of providing the superheater in wilcock and wilcox boiler?
Kirteshsharma
To make the super saturated steam. The steam is commonly used to rotate the turbines in the power generation plants. To save the turbine blades from corrosion the steam provided is made free from H2O by making it super saturated using super-heater in the boiler.
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Steam free from H2O. Now there's a thing... Steam IS H2O: it's water in its gaseous phase!
It is true that water droplets are not wanted in a turbine, but that is not the primary function of superheating, either in turbines or reciprocating engines. The steam at boiler pressure is at the evaporation temperature of the water at that pressure. Consequently, as pressure falls the steam starts to condense, wasting energy. Superheating raises the steam's temperature higher still, allowing it to remain as a gas for longer in its passage through the engine, hence maximising the thermal efficiency of the system. It was applied first to railway locomotives in the 19C, and found very quickly to save a lot of coal and water for given engine power outputs.
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When boiler use cyclone separator and why?
for the purpose of water-steam separation. High efficiency separation is very important in order to: - prevent water droplet carryover into the superheater, where serious thermal damage can occur. - prevent the carryover of solids entrained in water droplets into the superheater and turbine blading, where deposits may form, which are difficult to remove. These deposits end up reducing turbine efficiency and causing superheater tube temperature increases, distortion or even burnout.
Which safety valve should be set to discharge at lower pressure drum safety valve or super heater safety vlave?
The Superheater safety valve must be the lowest set safety valve on any boiler, in order that flow through the superheater is maintained.If the drum valve were set lower the flow through the superheater would be disrupted on an overpressure.
What is platen superheater?
it is a low pressure heater used in the boiler system in the thermal power plants to convert the saturated steam into super heated steam.
What is main purpose of refractories of boiler furnace?
one of the main purpose of refractories in the boiler furnace is to
What will happen if the superheater safety valve lift first in the boiler?
If the superheater safety valve lifts first the excess pressure will be relieved and no damage will be done due to overheating. This is a good thing and the way it should work. If the boiler safety valve were to open first there would not be enough of a steam flow through the superheater to "cool" the tubes of the superheater which could result in severe damage. +++ ??? That does not read right at all. For a start, steam only flows through the superheater when the engine cylinder or turbine is operating. Locomotive boilers' superheaters don't have safety-valves on them, and the regulator is upstream of the superheater, but they don't overheat when the regulator is closed. The boiler safety-valve would not lessen the flow of steam through the superheater anyway - its role is to vent excess steam hence prevent over-pressure in the boiler. A safety-valve on a superheater would similarly only protect the pipes from over-pressure, not from overheating.In fact it's difficult to think of a situation in which a superheater can be overheated to the point of damage. OK Let us look at your rebuttal to my answer and I will explain why you are wrong. First you say that steam only flows through the superheater when the engine cylinder or turbine is operating. This is true but it is the first indication that you don't really understand thermodynamics. The steam is not flowing but the temperature continues to rise. Just because the safety valve lifts you don't automatically shut off the fire and this heat continues to act on the superheater raising the temperature to a level where it could damage the metal of the superheater tubes. In other words, the superheater tubes get hot from the fire and the steam gets superheated by carrying this heat away. If this heat is not removed the tube overheats and becomes damaged. But hey don't take my word for it lets see what the experts have to say. In the 40th edition of Steam, Its Generation and Use by Babcock & Wilcox Chapter 23 Page 6 under Safety and relief Valves paragraph 6 and I quote "For drum boilers with superheaters, Babcock & Wilcox (B&W) prefers to follow the Code allowed procedure of setting the safety valves so that the superheater valve(s) lift first at all loads, thereby maintaining a flow of steam through the superheater(s) to provide a measure of over-heat protection."
What is the purpose of boiler drum?
Purpose of the boiler drum is to collect steam from all the various tubes in a boiler, and send it to the turbine to spin the generator
What is SA-213 Grade T-12?
ASTM A213 T12 Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes.
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enviromental pollution control
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A wood boiler is a furnace that is cost efficent and economic. You can purchase them on your own and have them professionally installed.
What is the function of economizer in bent tube boiler?
The flue gases, after leaving the main boiler and the superheater, will still be hot. The energy in these flue gases are used to preheat the already preheated feed water once more by means of the economizer. The economizer is a heat exchanger mounted in the first part of the chimney to improve the thermal efficiency of the boiler. In broad terms a 10°C increase in feed water temperature entering the boiler will give an efficiency improvement of 2% of last mentioned.
What is the purpose of cerculating pump in the exhaust boiler?
pump fluid
