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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 else can I help you with?
What is the most common type of high pressure boiler?
Bent-tube
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.
Which is better fire tube boiler or water tube boiler?
The words are literal , a water tube boiler is water inside the tubes with hot gases surrounding them and a fire tube boiler are got gases within the tubes with water surrounding them.
What are some crackers that are health beneficial?
Straight tube boiler and bend tube boiler
What is asme section one requirements for u t of economizer tube bends?
asme VIII
What are the advantages and disadvantages of fire tube boiler and water tube boiler?
the advantage is the design is complicated
What is difference between vertical and horizantal boiler?
there are two types of boilers water tube and fire tube. fire tube boilers are divided in to two categories vertical and horizontal. this according to the construction of fire tubes. it is said that vertical boilers are inefficient than horizontal boilers. The vertical boiler is small capacity, and horizontal boiler is higher capacity, well, the horizontal boiler have many types according the drums, there are single drums boiler, and double drums boiler, while, the single drums boiler have fire tube boiler and water and fire tube boiler, double drums boiler is usually water tube boiler.
What are the 2 main types of boilers?
Fire tube and water tube. Steam Boiler and Water Boiler.
What is a simple vertical boiler?
A simple vertical boiler is a type of fire-tube or water-tube boiler where the boiler barrel is oriented vertically instead of the more common horizontal orientation.
Difference between water tube boiler and fire tube boiler?
The answer is in the name. Boilers are made with a "tube - in - shell" construction, and the name implies what is in the tube. In a water tube boiler, the water circulates through the tubes, and the burner is usually under them. Most of the time, the "shell" of this style of boiler would not be watertight. A fire tube boiler has a watertight outer jacket with tubes through the center of it. The flame is shot through the tubes.
What is the function of chain grate stoker in water tube boiler?
it is used to burn the fuel(coal,usually) with primary and secondary air.the burning coal is then used to heat the water in the boiler to produce steam.
What is the average Boiler Tube Lifespan?
The average lifespan of a boiler tube is 20 to 40 years. Boiler tubes are made out of heat-resistant carbon and low-alloy steel.
