How does a water tube boiler work?
The working principle of water tube boiler is thermal siphoning (circulation of natural water). Basically, this type of boiler includes two drums namely steam, lower or mud drum. The hot gases which are produced by the fuel will replace heat by the water; the water gets changed into steam.
Where is the hot flue gases passes through in the fire tube boiler?
firebox
Hot flue gases created in the firebox (on the left) pass through the tubes in the centre cylindrical section, which is filled with water, to the smokebox and out of the chimney (stack) at far right.
Where is the steam produced in a water tube boiler?
The water within the water drum, and the connecting pipes to the other two upper drums, are heated, and the steam bubbles produced rise into the upper drums where the steam is then taken off. The bent tube or Stirling boiler allows for a large surface heat transfer area, as well as promoting natural water circulation.
What are the main features of a water tube boiler?
Key features of water tube boilers are listed below:
- They usually exist in larger sizes as compared to fire tube boiler designs.
- They are proficient in dealing with steam pressures which can be as high as 5,000 psig.
- Their recovery is much quicker than their firetube counterparts.
What are the 3 types of boilers?
There are three main types of boilers you can install into your home: combi boilers, heat only (regular boilers) and system boilers.
What is water tube boiler example?
The water-tube boiler is those boiler in which the water is present inside the tubes and fire or hot gases surround these fire tubes. The examples of water tube boilers are a La-Mont, Benson, Stirling, Babcock and Wilcox, Yarrow and Loeffler boiler.
Where are fire tube boilers used?
They are widely used in small installations to heat buildings and to provide power for factory processes. Fire-tube boilers are also used in steam locomotives.
What is fire tube boiler with example?
Since fire is inside the tubes and hence it is named as fire tube boiler. The heat from the hot gases is conducted through the walls of the tube to the water. The examples of the fire tube boiler are the simple vertical, Cochran, Lancashire, Cornish, Locomotive, Scotch marine, and Velcon boiler.
What are the advantages and disadvantages of water tube boiler?
Disadvantage:
| SL NO | Disadvantage |
|---|---|
| 1. | Complex design and High maintenance cost. |
| 2. | A skilled operator is required for operation. |
| 3. | This is used in large power plants and it is uneconomical for use in small industries. |
| 4. | For the same power output, the cost of a water tube boiler is high. |
Where are water tube boilers used?
Water tube boilers can generate saturated or superheated steam, which is useful for applications such as steam turbine power generation. In addition, these boilers are commonly used in process industries, including chemicals , refining, and pulp and paper manufacturing.
Which one is the water tube boiler?
A watertube boiler has pipes (tubes) filled with water which are surrounded and heated by hot gases, whereas a firetube boiler’s pipes (tubes) are filled with fire and heat the water that surrounds them.
Which type of boiler is best?
The three different boiler types to choose from are: Combi boiler or storage combi – best for small flats. Heat-only or regular boiler – great if you have space. System boiler – best for poor water pressure.
How are hot gases generated in a water tube boiler?
In this type of boiler, using the fire hoke fuel is added into the grate which destroys by fire to generate the warm gases. Ash pit is for collecting the ash which is converted from the fuel. Hot gases increase high and supply their heat toward the water within the cross box, then moves out using the chimney.
Where is the fire door in a water tube boiler?
The fire door in the water boiler will be located at the bottom and the fuel will be supplied through this door and burns in a grate. The burning fuel will generate the hot gases that are forced in the grate to supply upward with baffle plates.
Where does steam come from in a bent tube boiler?
Due to more density this water comes down in the lower water drum. The water within that water drum and the connecting pipes to the other two upper drums, are heated up and consequently steam bubbles are produced. This is the most basic working principle of bent tube boiler.
How is a water tube boiler different from a fire tube boiler?
This is the basic definition of water tube boiler. Actually this boiler is just opposite of fire tube boiler where hot gasses are passed through tubes which are surrounded by water. There are many advantages of water tube boiler due to which these types of boiler are essentially used in large thermal power station.
Where does the gas go in a fire tube boiler?
It is then divided into each side and runs downward in the steam chest (at the rear of the smoke box), where it is then admitted into the cylinders by means of valves. A fire-tube boiler is a type of boiler in which hot gases pass from a fire through one or more tubes running through a sealed container of water.
Where does the water go in a boiler?
The cooler water falls down a rear circulation header into several inclined heated tubes. As the water temperature increases as it passes up through the inclined tubes, it boils and its density decreases, therefore circulating hot water and steam up the inclined tubes into the front circulation header which feeds back to the drum.
How does a firebox work in a boiler?
The firebox is surrounded by a cooling jacket of water connected to the long, cylindrical boiler shell. The hot gases are directed along a series of fire tubes, or flues, that penetrate the boiler and heat the water thereby generating saturated (“wet”) steam.
What kind of boiler is a water tube?
A further development of the water-tube boiler is the bent tube or Stirling boiler shown inFigure 3.3.7. Again this operates on the principle of the temperature and density of water, but utilises four drums in the following configuration.
