Advantage and Disadvantage of Water Tube Boiler

Steam is an important source of energy for our modern age. We are using steam from very beginning of our first industrial revolution in human history. Now we are using steam from Textile Industry to Power Plant. In a Nuclear Power Plant steam use in a huge scale. For common usages we use very basic type of steam generator or boiler. Water Tube and Fire Tube Boiler is one of them. Both have some advantage and disadvantage. In this post we will learn some basic advantage and disadvantage of water tube boiler.

These two types of boiler have common principle for generating steam with different working principle. For Water Tube Boiler heat passes through outside (Around) of the tube and in Fire Tube Boiler heat passes through inside of the boiler tube.

Water Tube Boiler Parts
Water Tube Boiler Parts. Source- SlideShare

Water Tube Boiler has several types by different category. You will find each common category in this article. Water tube boiler has some special advantage that fire tube boiler don’t have.

Before we start let’s know about the working principle of water tube boiler and it will help you to understand its advantage and disadvantages clearly.

Water Tube Boiler Working Principle:

First of all Water Tube Boiler and Fire Tube Boiler are completely opposite for its structural designs. In Water Tube Boiler water will be heated inside the Boiler Tube and heat will passes around the Tubes. Generally heat passes from the boiler Furnace or Combustion Chamber to around the Boiler Tube. There are some other component is present with the boiler like Economizer, Air Pre-Heater, Steam Drum, Feed Water Pump, Steam Re-Heater. This type of boiler can use Oil and GAS in Combustion Chamber.

When Feed Pump started to supply the feed water then, water converted into saturated steam. This saturated steam becomes full Super Heated Steam by Super Heater and Steam Re-heater. Then Super Heated Steam supply to the prime mover. Now let’s go and find out the advantages and disadvantages of a Water Tube Boiler.

Related: Construction and Working Principle of Lamont Boiler

Advantages of Water Tube Boiler: 

Operation: Operating a Water Tube Boiler is safe and easy.

Hitting Surface: It has more hitting surface and has many water tube that heat the feed water.

Work Efficiency: This boiler has great work efficiency. We can control its heating process by controlling the amount of water supply in the water tube.

Small Steam Drum: This type of boiler has small size steam drum. For this reason we can use the generated steam at the pressure from 40 kg to 140kg/cm.

Flue GAS: In Water Tube Boiler flue GAS flows vertically.

Movement: Is easy to mover Water Tube Boiler from one place to another place.

Space: This Boiler required less space for installation.

Disadvantages of Water Tube Boiler:  

Water Tube Damage: Boiler Tube can be damage if there is any dust in feed water. Because, it block the water circulation. Deposition of salt and sediments in the inner surface of Water Tube is a common problem for this type of boiler.

Water Level: Water Tube Boiler use less water and for this reason water level needs check randomly. A make up water pump is use for supplying the necessary water.

Maintenance: Maintenance Cost for this boiler is high.

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