Benson Boiler: Working, Pros, Cons and Applications

Want to know about Benson Boiler?

Then you landed in the right place. Here you will know the perfect explanation of Benson Boiler, from scratch to end.

So, come with me and be comfortable while I start the engine of this knowledgeable journey.

Hence, without further delaying, Let’s dive in-

What is Benson Boiler?

Benson boiler is a high-pressure, drumless, supercritical, water tube steam boiler with forced circulation.

This boiler is a supercritical boiler in which the feedwater is compressed at a supercritical pressure and thus prevents the formation of bubbles in the water tube surface, unlike LaMont Boiler.

This boiler has a steam-generating capacity of 150 tones per hour approx.

This boiler was invented by Mark Bensen in 1927. Firstly. This boiler was kept in the West Germany power station.

Now, let’s move to the working principle of this boiler.

Working Principle of Benson Boiler-

It works on the principle of critical pressure of water where the pressure of the water is increased to the supercritical pressure.

This superheated water directly changes into steam without boiling the water and hence it prevents bubble formation.

Benson boiler diagram-

Parts and Construction of Benson Boiler-

Here are some parts or Boiler’s Mounting and Accessories of this boiler and its construction-

• Chimney
• Fan
• Air Preheater
• Economiser
• Feed Pump
• Throttle valve
• Convective Evaporator
• Super Heater
• Radiant Evaporator
• Combustion Chamber

1. Chimney-

The chimney is used to take out wasted gases from the chamber.

2. Fan-

The fan is used to pull the air from out and circulate the hot gases inside the chamber for further heating the water.

This hot air is sent to a hot well for further heating the water

3. Air Preheater-

Air preheater is used to preheat the air drawn by the fan and convert it into hot air to provide heat to the hot well water.

4. Economiser-

The function of the economizer is to preheat the water. It preheated the water which is coming from the feed pump to utilize the wasted heat and increase efficiency.

This preheated water is further sent to the combustion chamber situated bottom side of the boiler.

5. Feed Pump- 

A feed pump is used to draw the water from the hot well and send it to the economizer.

6. Throttled Valve-

Throttled valve is used to stop and release the steam as per need.

7. Convective Evaporator-

The function of the convective evaporator is used to raise the hot gases into the upward direction and settle down the cold gases.

8. Super Heater-

A superheater is used to further raise the temperature of steam at the maximum level.

9. Radiant Evaporator-

A radiant Evaporator is used to convert maximum water into steam using the heat radiation of the combustion chamber.

10. Combustion Chamber-

As you know, the Combustion chamber is the main part of the boiler where fuel and air are mixed to generate heat and provide the required heat to generate steam.

Working of Benson Boiler-

Here is the step-by-step working of Benson boiler-

• The feed pump supplies the feed water to the chamber with high-velocity force
• Now, this feed water is first going to the economiser, where water is preheated with the help of combustion gases.
• Then this preheated water directly moves to the Radiant evaporator, where water gets converted into steam partially with the help of radiant heat coming from the furnace.
• Here this partially converted steam goes to the convective evaporator where fully converted steam moves forward and liquid gets to settle down for further conversion.
• Now, this fully converted steam moves to a superheater to further maximization of the temperature of the steam.
• This high-pressure hot steam is now ready to supply to the turbine.
• Here the key role of using multiple heat generation devices is to maximize the steam generation and thus increase the pressure of steam and raise it to supercritical pressure to maximize the overall efficiency of the boiler.
•  The average Benson boiler pressure is 250 bar.
• This is how Benson boiler works.

After construction and working of Benson boiler, I am heading you to the Benson boiler advantages and disadvantages and its applications.

Advantages of Benson Boiler-

Below are some major advantages of this boiler-

• No Drum
• Lightweight
• Quick Starting time
• Great thermal Efficiency
• Quick achieving maximum load capacity(within 10min)
• Easy transportation boiler
• Economical

Disadvantages-

Below are some major disadvantages of this boiler-

• Chances of the overheated tube due to absence of enough water
• Controlling difficulties, if the load varies
• Continues monitoring needed

Applications-

Below are some critical applications of this boiler-

• Thermal Power Plants
• Steam generation needs
• Mechanical Industry

• Must Read: Difference between Lamont Boiler and Benson Boiler

Conclusion-

That’s it for now. Here I have covered multiple topics regarding Benson Boiler including definition, principle, working, advantages and disadvantages along with its applications in an easy and digestible manner, I guess.

I hope you loved spending time here and it added some value to you.

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Here are some suggested articles, If you want to read more–

Velox Boiler

Lamont Boiler

What’s the Difference between condenser and Evaporator?

Thank you for being with me. I hope to see you in the next session.

Here is your gift, which I promise to give at the end of the article. So, here it is-

Benson boiler pdf
Benson Boiler ppt

Here are some MCQs of the boiler, you should consider having a look for while-

MCQ-

Abhishek Tiwary

Abhishek Tiwary is a blogger by passion and a Quality Engineer by profession. He completed his B.Tech degree in the year 2017. Now working in a reputed firm. He loves to share his knowledge with others.