Lamont Boiler 8 Parts, Working, Applications, Pros & Cons [PDF]

In this article, we are going to study the Definition, Main Parts, Working, Application, Advantages, and Disadvantages of Lamont Boiler. We have provided a PDF for the same.

Lamont Boiler is a water tube boiler and is a high-pressure boiler. There are other different types of water tube boilers namely Benson boiler, Stirling boiler, Babcock and Wilcox boiler, Yarrow boiler, and Loeffler boiler.

Lamont Boiler Definition

The Lamont Boiler is a type of forced-circulation water-tube boiler that was developed by Thomas C. Lamont in the early 20th century. This type of boiler is designed to be used in a variety of industrial applications, providing high-pressure steam, which can be used to power turbines, engines, pumps, and other mechanical equipment.

The Lamont Boiler is a unique design when compared to other boilers due to its forced-circulation design, which utilizes a series of pumps and pipes to circulate the water within the boiler. This provides greater efficiency and allows for higher-pressure steam to be produced as compared to other boilers. Additionally, the Lamont Boiler is highly efficient and is capable of producing steam from a wide range of fuel sources, including coal, oil, and natural gas.

Lamont boiler
Photo By Babcock Wanson

The Lamont Boiler is also designed to be extremely safe and reliable. It features several safety features, such as pressure relief valves, which help to prevent the boiler from reaching dangerously high pressures. Additionally, the Lamont Boiler is designed with several protective features which help to ensure the safety of the operators and the system.

The Lamont Boiler is a versatile and reliable piece of equipment that is perfect for a variety of industrial applications. Its unique design allows for higher-pressure steam to be produced and its efficient operation makes it a great choice for those who need to generate a lot of steam. Additionally, its safety features help to keep operators safe and the system reliable, making it a great choice for any industrial setting.

Parts or Construction of Lamont Boiler

A Lamont Boiler consists of several parts which are as follows

  • Economizer
  • Centrifugal Pump
  • Evaporator Tube
  • Grate 
  • Furnace
  • Superheater
  • Water Steam Separator Drum
  • Air Preheater
Parts or Construction of Lamont Boiler


Economizers use to preheat the water by using the remaining heat of the combustion gases. The feed water is first supplied to the economizer before entering the boiler. Economizer is a device that is used to increase boiler efficiency.

Centrifugal pump

The Lamont boiler is a force convection boiler. So a centrifugal pump is used to circulate water inside the boiler. This pump is driven by a steam turbine. The steam for the turbine is taken by the boiler.

Evaporator tube

The evaporator tube or can say water tube is situated at the furnace wall which increases the heating surface of the boiler. This is also at the upside and downside of the furnace and other equipment. The main function of these tubes is to evaporate water into steam. This also cools down the furnace wall.


The space in the furnace where the fuel is burned is called the grate. It is placed at the bottom side of the furnace.


In the Lamont boiler vertical furnace is used. The main function of the furnace is to burn fuel.


The steam generated by the evaporator tube is saturated. If it is directly used in the steam turbine can cause corrosion. So the saturated steam sends to the upper heater known as superheater, where it can increase the temperature of the steam.

Water Steam Separator Drum

The steam separator is situated outside of the boiler. The mixture of water and steam from the evaporator tube sends it to the water steam separator drum, which separates the stem and sends it to the superheater. The remaining water again sends to the economizer.

Air Preheater

In the air pre-heater, it preheats the air before entering the furnace. An air preheater is a device that increases the efficiency of the boiler.

Working Principle of Lamont Boiler

Lamont boiler works on the principle of forced circulation of water within the boiler with the help of the centrifugal pump. It’s working depending on the pump. The centrifugal pump circulates the mixture of steam and water through the small diameter tubes of the boiler. A feed pump forces the water into the economizer where the temperature of the water increases.

This water is forced into the evaporator tube by using a centrifugal pump driven by the steam turbine. Water passes 10 – 15 times into the evaporator tube. The mixture of saturated steam and water is formed inside the tube. This mixture sends to the steam separator drum which is outside the boiler. Steam from the separator sends to the superheater, where the saturated steam converts into superheated steam.

Working Principle of Lamont Boiler
Photo By Engineering Choice

The water again sends to the economizer where it again passes by the evaporator tubes. The air from the air preheater enters the furnace where fuel burn. The flue gases first heat the evaporator tube and then pass by the superheater. These gases form the superheater, which preheats the air into the air preheater before exhausting it into the atmosphere. The working pressure of this boiler is above 170 bar and has a steam generation capacity of about 50000 kg/hour at a temperature of 773 K.

Applications of Lamont Boiler

  • Boilers are mostly used in power plants where steam turbines are used for the generation of electricity.
  • Widely used in thermal power plants to produce steam for power generation
  • Used in the marine industry for propulsion, power generation, and heating systems
  • Used in the chemical industry for steam distillation, drying, and sterilization
  • Used in the textile industry for steam ironing and pressing operations
  • Used in the food industry for sterilization, pasteurization, and cooking
  • Used in the paper industry for steam production and drying
  • Used in the pharmaceutical industry for sterilization and production of medicines
  • Used in the sugar industry for steam production in sugar mills and evaporation of water from sugarcane juice.

Advantages of Lamont Boiler

  • Lamont boiler can generate a high amount of steam.
  • It is easy to start its operation.
  • The construction design of the Lamont boiler is very simple and easy to understand.
  • This boiler can reassemble with the natural circulation boiler and
  • It has a high heat transfer rate.
  • It is flexible in design.

Disadvantages of Lamont Boiler

  • The main disadvantages are Bubble formation on the surface of the tube reduces the heat transfer rate. For this reason a little problem with the total amount of steam generation.
  • Complex design and high maintenance cost
  • Expensive construction cost
  • Lower efficiency and slow startup time
  • High pressure and temperature, requiring special safety measures
  • Complex control system requiring skilled operators
  • Limited capacity for large-scale applications
  • Requires high-quality water to operate.


Is Lamont Boiler A Water Tube Boiler Or A Fire-Tube Boiler?

It is a water tube boiler.

What Are The Applications Of Boilers?

It can be used for heating, cooling, cleaning, humidification, etc. in production processes, and can also be used for power generation.
It can also be used in the textile industry, paper industry, food processing industry, building materials, metal smelting, heating engineering, etc.

What Are The Different Types Of Water Tube Boilers?

At What Pressure Lamont Boiler Works?

It works above 170 bar.


In conclusion, the Lamont Boiler is a unique type of water tube boiler that uses forced circulation and a high-pressure steam-generating system to produce steam. It has a distinct design that includes a steam separator drum, feed pump, water circulatory system, heating tubes, and a superheater. The boiler operates by passing water through a heating tube, which then heats the water and transforms it into steam. The steam separator drum separates the steam from the water and sends it to the superheater, where it is further heated and used for various applications.

The Lamont Boiler offers several advantages, including high thermal efficiency, simple design, and low maintenance requirements. However, it also has certain disadvantages, such as high construction costs and a limited operating range. Overall, the Lamont Boiler is a useful and efficient boiler system that finds applications in various industries, including power generation and manufacturing.


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