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What else can I help you with?
How do you increase boiler efficiency?
we can increase boiler efficiency by recovering the heat which is being carried by flue gases.by incorporating different things like Economizer, Air pre-heater , Super-heater and feed-water heater, we can there ll be notable increase in efficiency of boiler.
What is BTG of power plant?
Its Boiler-Turbine-Generator
What is safe working pressure on a boiler?
Safe working pressure on a boiler is the maximum pressure at which the boiler can operate safely without risking failure or accidents. This pressure is determined by the design and construction of the boiler, as well as relevant safety codes and regulations. It is typically specified by the manufacturer and can vary depending on the type and size of the boiler. Regular maintenance and inspections are essential to ensure that the boiler operates within this safe pressure limit.
Find the heating surface of a water tube boiler tube with a 3 diameter and 20 feet long?
3.14*3*20*12= 2260.8 sq inthe heating surface of a fire tube boiler is determined by adding all of the surface of the tubes that have hot water on one side and/or fire or gases of combustion on the other, including the super heater and economizer.
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 is the purpose of the economizer in a boiler?
Economizers (US), or economizers(UK/international), are mechanical devices intended to reduce energy consumption, or to perform another useful function such as preheating a fluid. The term economizer is used for other purposes as well. Boiler, power plant, and heating, ventilating, and air-conditioning (HVAC) uses are discussed in this article. In simple terms, an economizer is a heat exchanger.
What is mean by economiser recirculation line?
Since sufficient feedwater is not supplied into the economizer though the heat is absorbed from flue gas at the boiler start-up and low load operation, steaming may occur in the economizer. Therefore the economizer recirculation line is provided between the furnace downcomer and the economizer inlet feedwater piping. This line provides the recirculation flow between the drum, the downcomer and the economizer so as to prevent steaming in the economizer. Economizer recirculation valve is only opened at initial stage of the boiler start-up.
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 economizer in boiler?
Economizer is an accessory of boiler that recovers the waste heat from the flue gas blown out of the boiler. Thus it actually "economizes" the operational cost or in other words, improves the efficiency of fuel utilisation in the boiler. The temperature of the flue gases ( the mixture of burnt fuel & air ) depends up on the steam pressure ( temperature more precisely ). Higher the steam pressure generated, the higher is the flue gas temperature. Economizer is a heat exchanger which exchanges heat between water ( which is fed in to the boiler ) & the flue gas. It means it increases the temperature of the feed water using the otherwise wasted heat of the flue gas. So the water entering the boiler has higher temperature compared to the one without this economizer. This higher temperature of water requires less amount of heat to generate steam so the operation becomes "economical". Similarly the economizer can also work to heat up the air entering the boiler through the flue gas heat, instead of heating the water.
What is a function of deaerator?
deaerator is a device used to remove dissolved oxygen and carbondi oxide in boiler feed water. it causes scaling inside the boiler tubes and economizer also.
What is the use of economiser in boiler?
The economizer is used to raise feedwater temperature up to nearly the temperature of the boiler to avoid thermal shock and improve the boiler's efficiency. Every 11 degrees Fahrenheit increase in feedwater temperature yields a 1% increase in boiler efficiency.
How do you understand whether circulating pump is circulating water through economizer?
By measuring outlet temperature of water at downstream of pump and upstream of boiler.
How do you increase boiler efficiency?
we can increase boiler efficiency by recovering the heat which is being carried by flue gases.by incorporating different things like Economizer, Air pre-heater , Super-heater and feed-water heater, we can there ll be notable increase in efficiency of boiler.
Why economiser is used in boiler?
An economizer is used to heat boiler feedwater up closer to the temperature of the boiler water, using heat from the boiler exhaust gases, heat that would otherwise be wasted. The main reason is to improve the efficiency of the boiler. For every 44 degree F drop in exhaust gas temp. there is an 11 F rise in feedwater temperature and a 1% gain in boiler efficiency.
How does an economizer function on a centrifugal chiller?
What is used economizer in centrifugal chiller
What are the critical machineries onboard the vessel?
1. Main Engine 2. Diesel generator engine 3. Auxiliary Boiler 4. Exhaust gas economizer 5. Oily Water Separator 6. Steering gear system 7. Sewage treatment Plant 8. Mooring Winch/ Windlass
What is the working principle and construction of lamont boiler?
lamont boiler is high pressure boiler & it'swork on high pressure at constant temprature
