Steam Boiler

Cross Drum Water Tube Boiler

In this lesson, we will discuss Cross drum water tube boiler. Cross drum water tube boiler is a type of water tube boiler. As the name suggest in cross drum boiler  steam drum is placed cross way to heat source.

Cross Drum Water Tube Boiler

First we will discuss the construction of cross drum water tube boiler.

Construction of Cross Drum Water Tube Boiler
Cross Drum Boiler is essentially a variant of the Longitudinal Drum Boiler. In Cross Drum Boiler the steam drum is placed at cross ways to the heat source as shown in the figure. Here, the down-comer is fitted on the bottom of the drum and riser is fitted on the top of the drum via a horizontal tube as shown in the figure. 5 degrees  to 15 degrees inclined water tubes are connected with down-comer and riser tubes in same manner of Babcock-Wilcox boiler.

 

Now after discussing the construction of cross drum water tube boiler we will discuss the working principle of cross drum water tube boiler.

Working Principle of Cross Drum Boiler
The working principle of cross drum boiler is same as longitudinal drum boiler.
The feed water is fed to the cross drum through feed water inlet.
Then this water comes down through the down-comer pipe and enters into inclined water tube placed in hot chamber.
Here, the water becomes hot and steam is produced in the water which comes into steam chamber.

Here in the steam drum steam is separated from water in natural way.

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