Cross Drum Boiler | Working Principle of a Cross Drum Boiler | Water Tube Boiler | Components of Water Tube Boiler

Cross Drum Boiler

Cross Drum Boiler

The cross drum boiler is longitudinal in which the steam drum is located opposite the heat source. The water tube boilers differ from the shell type in which the water gets circulated from the tubes with the source of heat surrounding it.

This article will discuss the water and cross drum tube boiler and their working principle.

Also, Read: What Are the Responsibilities of a Boiler? | Boiler VS Heater | What Is the Difference Between Boiler and Water Heater

Working Principle of a Cross Drum Boiler

The Cross drum boiler and longitudinal drum boiler are similar to each other:

  • With the help of feed water intake, feed water is transferred to the cross drum.
  • Water flows downward with the help of a down-comer pipe and then enters in inclined water, which is placed in a hot chamber.
  • Here, the water becomes hot, and steam is generated from the water, which then comes into the steam chamber.
  • Water and steam get separated naturally in the steam drum.

Also, Read: Boiler Is Leaking Water from Bottom | Why Is My Boiler Leaking Water? | Is Your Boiler Leaking Water?

Water Tube Boiler

Water Tube Boiler


In a water tube boiler, the water of the tube gets heated, which is surrounded by hot gases. Opposite a fire tube boiler is nothing but a water tube boiler. A fire tube boiler is a boiler in which hot gases pass through the tubes surrounded by water.

Components of Water Tube Boiler

A water tube boiler comprises a boiler shell, mud drum, burner, mud ring, furnace, strainer, sight glass, steam stop valve, etc.

  • Boiler shell: boiler shell is a shell that has the outer cylindrical part of a pressure container.
  • Mud drum: In the base of water space, a cylindrical shape space is formed, which gathers impurities like mud, sediments, etc.
  • Furnace: A furnace is an enclosed space that provides for fuel combustion. ( An enclosed structure in which a material or other object can get heat to a very high temperature)
  • Strainer: This device is a filter that holds solid elements and lets a fluid supply.
  • Steam stop valve: The steam stop valve controls the flow of steam to supply outside

Also, Read: How Does Steam Generator Work? | What Is a Steam Generator? | What Is a Steam Boiler?

Cross Drum Water Tube Boiler

The Cross drum boiler and longitudinal drum boiler are similar to each other. In a cross drum boiler, the steam drum is located opposite the heat source. At the bottom of the drum, a down-comer is installed while a riser is installed on the top of the drum by a horizontal roof.

About 5 degrees to 15-degree inclined water tubes are connected by the down corner and riser tube in the same way so that a Babcock-Wilcox boiler is connected. The cross drum boilers achieve higher uniform temperature throughout the drum, and the working principle of the cross drum water tube boilers is the same as the longitudinal drum.

The principle on which the longitudinal drum works on the same principle, the cross drum also works, except that it achieves a little more uniform temperature over the drum.

Also, Read: What Is an Overflow Pipe? | How to Fix a Leaking Overflow Pipe | Overflow Pipe Leak? | Boiler Overflow Pipe

Water Tube Steam Boiler

In our modern age, steam is one of the great sources of energy. From the start of the 1st industrial revolution in human history, humans have been using steam.

We started using steam from the start of the first industrial revolution, which provided sterilization and also many other applications and works which are essential for industrialization.

With the help of a boiler or steam generator, steam is created by applying heat energy to the water. The large utility boilers mostly depends on water-filled tubes. In water, tube boiler water circulates in a tube heated externally by the fire. In the furnace, fuel is burned and creates hot gases, which boils water in the steam-generating tubes.

Also, Read: Steam Boiler Not Heating All Radiators | Why Are My Radiators Not Working? | Boiler Baseboard Heater

Flex Tube Boiler

A Bent water tube boiler powers the vehicle’s engine and is immensely rugged. Because of his past experience in the projects for the future, Bryan is promoted to the leader in making flexible water boilers.

The flexible tube boiler provides faster, natural internal circulation that helps in maximum heat transfer and higher operating efficiency. No dependency on the external pumps.

One of the precious FTH series “Flex Tube” boilers is nothing but the two drum system with multiple longitudinal passes separated by the tangent water walls. As a result, long, turbulent gas will travel without gas stratification.

Also, Read: What Is Boiler Mounting? | What Are Boiler Accessories? | Boiler Mountings and Accessories | Difference between the boiler mountings and accessories

Advantages of Water Tube Boiler

There are various advantages of a water tube boiler:

  • Water tube boilers are best suitable for thermal power stations.
  • We can achieve a large heating surface area by using water tubes.
  • The flow of water is faster than that of a fire tube boiler; that’s why the heat transfer rate is high as it results in higher efficiency. As a result, very high pressure can be obtained smoothly.
  • Water tube boilers are safe, and they are easy to operate. Water tube boilers react fast to steam demand, and they provide a highly efficient performance of more than 90% with an economizerTransformation of heat is rapid.
  • Water tube boilers can be easily transported from one place to another. And quickly get access while cleaning, repairing, and during the inspection; it can easily tolerate high steam pressure and have extensive.

Also, Read: What Is Marine Boiler? | Principle of Marine Boiler | Types of Marine Boiler

Disadvantages of Water Tube Boiler

Water tube boilers also have some disadvantages, which we are going to describe:

  • If the dust settles in the feed of the water, there is a possibility that the boiler gets damaged because it blocks the circulation of the water.
  • The salt and sediments which are deposited on the inner surface of the water tube are the most common problem which happens in this type of boiler.
  • The use of water in a water tube boiler is significantly less; that’s why the water level needs to be checked randomly. A makeup pump or water pump is used to supply the necessary water.
  • The maintenance cost required for the maintenance of the water tube boiler is very high.

Also, Read: Parts of Babcock and Wilcox Boiler | Working of Babcock and Wilcox Boiler | Specifications of Babcock and Wilcox Boiler

Frequently Asked Questions (FAQ)

Working Principle of a Cross Drum Boiler

The feed water is fed to the cross drum through a feed water inlet. Then this water comes down through the down-comer pipe and enters into an inclined water tube placed in the hot chamber. Here, the water becomes hot, and steam is produced in the water which comes into the steam chamber.

Water Tube Boiler

A high-pressure water tube boiler (also spelled water-tube and water tube) is a type of boiler in which water circulates in tubes heated externally by a fire. Fuel is burned inside the furnace, creating hot gas which boils water in the steam-generating tubes.

Cross Drum Water Tube Boiler

Cross Drum Straight Tube Boiler. Another early water tube design has inclined straight tubes with the drum at right angles to the tube cross drum.

Water Tube Steam Boiler

A high-pressure water tube boiler (also spelled water-tube and water tube) is a type of boiler in which water circulates in tubes heated externally by a fire.

Flex Tube Boiler

The unique flexible bent tube design prevents all possible damage from thermal shock and related problems. Bryan Flexible Tubes are easily removable and replaceable, allowing for quick and simple boiler maintenance.

Industrial Water Tube Boiler

Industrial Watertube Boilers are designed with a 100 percent membrane water-cooled furnace. Each boiler system includes a high-efficiency boiler and burner, heat recovery economizer, and an advanced control system, all available at shortened lead times with comprehensive technical documentation.

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