Types of boilers

 

 

Types of Boilers

 

Boilers are divided in Two main Types

1. Fire Tube Boilers
2. Water Tube Boilers

Fire Tube Boilers

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• A steam boiler in which the products of combustion pass through the tubes, which are surrounded by water.

Advantages

• Easy to Clean

• Relatively inexpensive

• Compact in size

• Well suited for industrial applications

• Operates with oil, gas or solid fuels

Disadvantages 

• Not suitable for pressure higher than 30 bar

• Limitation for high-capacity steam generation (upto12,000 kg/hour)

Water Tube Boilers

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• A steam boiler in which the water passes through the tubes and products of combustion surround the tubes.

Advantages 

• Available in larger capacities (4,500 – 120,000 kg/hour)

• Able to handle higher pressures

• Faster response to changing loads

• Provide an adequate furnace to ensure complete combustion.

Disadvantages 

• High initial capital cost

• Cleaning is difficult due to design structure

• No commonality between tubes

• Bigger in physical size

• Lower tolerance for water quality and needs water treatment plant.

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