Construction and Working Principle of Benson Boiler

In this post we will learn about the Construction and Working Principle of Benson Boiler. I also published couple of article about industrial boiler and if you want you can find it here after reading this article.

Before we go farther lets know about person who invented this supercritical industrial type boiler. This boiler was invented by Mark Benson between 1926 to 1927.  But in 1924, Siemens acquired the right to use Benson’s patent. He was a Bohemian German engineer and best known as the inventor of a supercritical boiler. He was born in the Sudetenland, Germany and his original name was Müller. Mark Benson changed his name after World War I.

Benson Boiler
Benson Boiler. Source- SlideShare

What is Benson Boiler?

Benson Boiler is a water tube steam boiler. If we add more then we can say it is a supercritical, high pressure, drum less with forced water circulation system boiler.  Due to reason of supercritical boiler it compressed the feed water by supercritical pressure and prevents bubble formation inside the water tube surface and it is great advantage of this boiler.

Construction of Benson Boiler:

First of all let’s know about the main parts name for this supercritical boiler. By the way what is a supercritical boiler? A supercritical steam generator is a type of boiler that can operates at supercritical pressure which frequently used in the power plant for generating electricity.

Come to the point. Benson Boiler consist with furnace where fuel use to burned and generate heat.  An air pre-heater use before the furnace that pre-heat air and heated air increases the burning efficiency of fuel. It’s kind of opposite than fuel burning system in any engine. Then a high pressure feed water pump use to sent feed water inside the boiler at high pressure. Radiant super heater heats feed water by the radiation from burnt fuel.  A convection evaporator convert’s super heated feed water into steam. An economizer is use to heat feed water at first place. A convection super heater use to generate steams at a desired temperature.

Related: Construction and Working Principle of Lamont Boiler

Working Principle of Benson Boiler:

Now the Working Principle of Benson Boiler. We already know that it is a water tube boiler.  It use pressurized feed water which pressured by steam and in furnace it use fuel to generate heat. Benson Boiler does not contain any drum like Wilcox and Lamont Boiler has. Furnace installed at the bottom of the boiler. Furnaces oil burn inside the furnace and heat goes through the radiant tube, super heater, and economizer, then flue gas comes out by the chimney. Feed water goes through economizer by steam pressure.

After passing economizer, feed water come to the header which is present at the bottom of radiant tube. Water absorbs heat from bottom header and radiant tube then is reach to the top header. From top header steam goes through the boiler transit section and come to the super heater. Inside the super heater steam becomes more heated and then it sent to the turbine.

In Benson Boiler water at first goes through the economizer and then reached to the bottom header and super heated steam supply form others side. Benson Boiler can generate 136000 Kg steam with 210 Kg steam pressure per square centimeter.

By the Benson Water Tube Boiler feed water strength convert into steam and for this reason by the feed water pump, high pressure feed water sent to the boiler. Sometime critical temperature level keeps below than its maximum level for its better work efficiency during boiler installation time.

Related: Construction and Working Principle of Babcock and Wilcox Boiler

Advantage and Disadvantage of Benson Boiler:

Now come to the some advantage and disadvantage of the Benson Boiler. First advantage, it is light weight and it has no drum. For this reason it is lighter than others boiler. It starting time is less than others boiler and it has up to 90 percent thermal efficiency. Due to supercritical types of boiler its controlling need to monitor every time for preventing any explosion and it is a disadvantage of this boiler.

Related: Definition of Boiler and Various Types of Steam Boiler or Steam Generator

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