What is boiler
A boiler is a machine that works to convert water into steam, hence a boiler is also known as a steam generator.
The steam from the boiler is used in many places. If we talk about the use of this steam, then it is the most used power generating station where electricity is generated.
Apart from this, we need steam in many other industries like the textile industry, sugar mill, chemical industry, etc. So even inside all these industries, you get to see boilers.
Use of Steam from Boiler
Steam is used everywhere for different purposes. Let me tell you some of the main uses, which will help you get an idea.
To rotate the turbine in a power plant
to heat water
To heat the air in the AHU
Boiler Definition:
A boiler or Steam Generator is a Closed Vessel in which water is converted into steam by the application of heat is provided by the combustion of fuel.
A boiler and Steam Generator is a closed vessel in which water is converted into steam using the heat from fuel combustion.
In this, heat energy is generated by burning fuel. With the help of heat energy obtained from burning fuel, we convert water into steam.
what is boiler
Types of Boilers
Boilers are classified in different ways according to their need and design.
- Based on Tube Contain
- Position of Furnace
- According to Boiler Position
- According to the use
- According to the Water & Steam Circulates
- According to the Fuel Uses
- According to the pressure developed
- Based on the fuel combustion system
- Based on fuel feeding
- Based on Tube Contain boilers
On the basis of the tube used in the boiler, the boiler is divided into two parts.
A) Fire Tube Boiler - In a fire tube boiler, there is a fire inside the tube, and water is filled around the tube, that is why it is called a fire tube boiler.
The Fire-tube boiler is mostly installed in the place where we need flame pressure steam.
B) Water Tube Boiler - In this boiler water remains inside the tube, and in the rest of the place, it remains fire. Due to this, we get more steam from this boiler. Where we need high-pressure steam, we use a water tube boiler.
Position of Furnace Boilers
A) Externally Fired Boiler - In this type of boiler, we give the fire outside the furnace to the boiler.
Meaning we keep the fire in this boiler in a separate section, that is, we keep it outside the furnace, which is why we call it an Externally Fired Boiler.
B) Internally Fired Boiler - This boiler is completely opposite from Externally Fired Boiler. When we make a fire inside the furnace itself, we generate heat inside it, then it is called Internally Fired Boiler.
FBC boiler, pfbc boiler Both of these are examples of Internally Fired Boiler, in which the fire is done inside the furnace itself.
According to Boiler Position
Apart from this, the boiler is also divided according to its position. In this, the boiler position means the position of the axis of the boiler shell.
The Boiler is Divided Into 3 parts.
- Vertical Boiler
- Horizontal Boiler
- Inclined Boiler
- According to the use
Stationary Boiler - These boilers are fixed in one place, they cannot change their position. In Stationary Boiler, all those big boilers come, which are made in the company building.
If we talk about its example, then FBC Boiler, CFBC Boiler, and PFBC Boiler are also examples of Stationary Boiler, all these boilers are fixed in one place.
Portable Boiler- Portable boiler is also called a mobile boiler. Marine Boiler is an example of this type of boiler, this boiler is used in ships of water.
Marine Boiler keeps changing its position from one place to another due to being on the ship. So this type of boiler is called Portable Boiler or Mobile Boiler.
According to the Water & Steam Circulates
Apart from this, the boiler is also divided according to how steam and water are flowing inside the boiler.
Natural Circulation Boiler – All those boilers come inside it, inside which the circulation of water and steam remains natural. We never use any type of force in this boiler.
In this boiler, steam and water flow naturally up and down.
Forced Circulation Boiler- Apart from this, when we take the help of any force to bring water and steam from one place to another, it is called Forced Circulation Boiler.
You must have seen this process many times, that we are taking the help of a pump to bring water from one place to another in the boiler. So in the same way, in whichever boiler we apply force to make water and steam flow, it is called Forced Circulation Boiler.
The forced Circulation Boiler is also talked about in two parts.
Controlled
Once-Through
According to the Fuel Uses
A boiler is also divided according to fuel usage. We use fuel to convert water into steam by generating heat. Different types of fuel are used to generate heat in all boilers, which are as follows.
- Coal Fired Boiler
- Oil Fired Boiler
- Gas Fired Boiler
- Electrically Heated Boiler
- Nuclear Heat Boiler
- Solar Energy Boiler
- Hot waste gas boiler
- According to the pressure developed
After this, we also divide the boiler according to its pressure.
Low-Pressure Boiler- If the pressure of this boiler is less than 80 bar, then we call it a Low-Pressure Boiler. Many times we call a boiler less than 40 bar a flame-pressure boiler, and a boiler from 40 bar to 80 bar is called a medium-pressure boiler.
High-Pressure Boiler- The boiler whose pressure is above 80 bar is called a high-pressure boiler. The high-pressure boiler is divided into two types.
Sub-Critical Boiler- The boiler whose pressure is between 80 bar to 221 bar is called Sub Critical High-Pressure Boiler.
Super Critical Boiler- And the boiler whose pressure is more than 221bar, it is called
Super Critical High-Pressure Boiler.
Based on the fuel combustion system
Suspension Combustion Boiler- Suspension boilers include those boilers, in which the fuel is burnt in the air itself, here the fuel is burnt in the middle of the furnace. Example- PF Boiler
Bed Combustion Boiler- The boiler in which the combustion of fuel is done on the combustion bed is called Bed Combustion Boiler.
There are two types of Bed Combustion Boilers.
- Chain Gate Stoker Boiler
- Fluidized Bed Boiler
- Based on fuel feeding
The boiler is also divided according to the fuel feeding. Fuel feeding means how we are sending the fuel to the boiler. Here we do fuel feeding in the boiler in two ways.
1. Above Bed- When fuel is fed from above the bed, it is called the above bed fuel-feeding boiler. Example- Stoker Bed, CFBC boiler
2. Under Bed – But if we feed fuel from under the bed then it is called Under Bed fuel feeding boiler. Example- AFBC boiler
So these are some of the main types, the way the boiler is divided. Well apart from this, we can also divide the boiler in many other ways.
For example, according to the tube, according to the drum, according to the draft, etc. But today I have told you the main points.
So friends, hope you have got answers to many questions related to your Boiler today. If you still have any questions related to engineering, then you must tell us by commenting.