0
Usually high pressure boiler feed water is a 3 cell control using the drum level transmitters average, Steam flow Transmitter and feed water flow transmitter
The drum level controller is tuned so that the drum level is around the half glass depending on load using the steam flow as a feed forward & drum level trim (lifting the drum level above SP under high load and lowering drum level under SP for low load)and the water flow to balance out with the steam flow (mind you if you blow down or have a tube leak the drum level will open the feed water control valve to maintain level) the main tuning in the P.I.D for this is Gain and integral not using derivative as it is too abrupt in its response
obviously the actual full control schematics is a lot more complex than this
What else can I help you with?
Why is steam so dangerous?
Because in order to turn water into steam (liquid to gas) it must be heated intensely past the point of boiling, therefore the resulting steam is obviously extremely hot. If you are referring to the danger of a catastrophic pressure vessel failure (boiler explosion) the danger comes from a three-pronged issue. Water under pressure will not boil at 212 degrees (100 C). As the pressure goes up, so does the temperature need to get the water to boil. When a pressure vessel fails, there is the potential for an instantaneous drop in pressure from X pounds per square inches to ZERO psi. But of the water is (for example 350 degrees F) then without the pressure it will flash boil into steam. This is the thery of why locomotive boiler explosions were so deadly. It was common theory that when the firebox's roof sheet failed and the steam in the boiler evacuated into the firebox, the water flsah boiler, instantly raising the pressure to 50 to 100,000psi.
How is coal turned into energy in power plants?
Coal is burned in a boiler to produce high-pressure steam, which drives a turbine connected to a generator to produce electricity. This process is known as steam-electric power generation. The generated electricity is then distributed through a power grid for use in homes, businesses, and industries.
Diagram of How electricity is generated by coal?
You can look for diagrams elsewhere, or draw one yourself, but the basic principle is the following: a coal fire (chemical reaction between coal and oxygen from the air) heats a cauldron, which contains water. This causes pressure; the water vapor pushes out, moving the generator.
How is electricity produced at a coal burning power plant?
Coal is combusted, to generate heat Heat is used to generate steam, in a boiler, under pressure. The pressurised steam then drives a turbine. The turbine is rotating, and co-shafted to the generator. The generator is a rotating magnet inside a coil of wire. The rotating magnet inside the coil of wire induces an electric current in the wire. Coal is an impure mixture of carboniferous compounds. It can be converted to coke , which is an impure form of carbon. NB A Nuclea power station does exactly the samer, except that nuclear changes in the atoms generate heat to make the pressurised steam.
What are the effects of seawater as a boiler feedwater?
Fresh water: Can start the oxidation of iron or steel, and the pitting occurs because a small electrochemical form between the rust-metal interface.Sea water: They can corrode the boiler five time faster than freshwater.Distilled water: Can cause the boiler corrode also because deionized water is amazingly corrosive.
What does the steam boiler do?
Boils water to create high pressure steam.
What the inside of steam boiler?
"What the inside of steam boiler?" Would you like to know: with no water and steam, construction, under steam conditions, high loads, high TDS, Low pressure.
What function does a boiler play in a power station?
This is where water is turned into steam at high pressure, which is then fed into the steam turbine
What is the range of a high pressure boiler?
High pressure Steam 15 PSI High pressure water 160 PSI /250 degrees, now you can ask WHY?
What is the range of high pressure boiler?
High pressure Steam 15 PSI High pressure water 160 PSI /250 degrees, now you can ask WHY?
How boilers are classified?
A high pressure steam boiler is boiler in which steam is generated at pressure exceeding 15 psig and operates hot water boiler above 160 psig or 250o F. Application this type usually is used for utility plants, big industrial plants and process application. A high pressure steam boiler can be named as Power Boiler, in which design and construction rule following to rules of ASME Boiler and Pressure Vessel Code Section I - Power Boiler.
What is the explanation for the working of a benson boiler?
Benson Boiler is a water tube high pressure boiler having forced circulation. It works on the principle that if the boiler pressure is raised to critical pressure (225 kg/cm^2) then there is no formation of steam bubbles Because the steam and water at this pressure will have the same Density. To achieve this water is fed to the boiler at critical pressure . At this pressure water will be directly converted to superheated steam as the latent heat at critical pressure is zero. Overall efficiency of plant is decreased as a lot of energy is consumed by feed water. Operating the boiler at a slightly lower pressure than the critical pressure efficiency can be increased. Thermal efficiency upto 90% can be achieved.
In order for a high temperature boiler or steam engine to produce superheated steam?
In order for a high temperature boiler or steam engine to produce superheated water, or steam?
In boiler where is highest pressure?
STEAM High pressure 15 PSI Hot water boilers 160 PSI and or 250 DEGREES F
How does a steam boiler work?
A steam boiler works by heating water to create steam, which can then be used for various applications, such as heating or powering machinery. The boiler contains a burner that heats the water using fuel, such as natural gas or oil, or electricity. As the water heats up, it converts to steam and builds pressure within the system. This high-pressure steam is then directed through pipes to where it is needed, and as it cools, it condenses back into water to be reheated in a continuous cycle.
How do close formula feeds differ from open formula feeds?
The feed system cycles between boiler and turbine and enables the steam to return to the boiler as feed water. A closed feed cycles a main propulsion steam run turbine through a high pressure water tube boiler. The condenser, set to a high vacuum, will receive the steam turbine exhaust.
How do close formula feeds differ from open feeds?
The feed system cycles between boiler and turbine and enables the steam to return to the boiler as feed water. A closed feed cycles a main propulsion steam run turbine through a high pressure water tube boiler. The condenser, set to a high vacuum, will receive the steam turbine exhaust.
