Steam has been an instrumental element in the onset of the Industrial Revolution. From powering the engines and turbines to factory machines, there are many advantages to its thermal energy. Apart from power, it can also be used for cleaning and other operations. Boilers are the industrial units that change the state of water from liquid to steam. There are many types of boilers used in various industrial processes. The three pass steam boilers are one of the most popular types due to their efficiency and multiple benefits.
All About Three Pass Steam Boilers
Definition
Three pass steam boilers are designed in a manner in which the steam that is generated after combustion passes through 3 different stages before exiting. As the exhaust gases travel back and forth, it maximizes the heat transfer. It transfers a high amount of energy obtained from the fuel, hence its conversion rate is spectacular. This also means the temperature of the gases exiting the chimney and safe for the surroundings.
Design
This boiler is an industrial unit, so the performance and safety are always prioritized when designing. This system is designed as a fire-tube construction, in which the tubes are completely immersed in water, and the steam flows through these tubes. The components are a cylindrical pressure vessel, burner, combustion chamber, multiple tubes, tube sheets, reversal chamber and smokebox. Besides these, valve, inlet, pressure gauge and level indicators complete the assembly.
Working Stages
As discussed earlier, this boiler has three stages through which the steam flows inside the vessel. In the first stage, hot gases from the combustion chamber transfer heat to the first tube. The tube gets hot, beginning the process of steaming the surrounding water. In the second stage, the hot gases hit the reversal chamber and are redirected towards a second set of tubes. More heat is transferred to the water. In the final stage, gases hit the front of the chamber and flow into the third set of tubes, transferring the maximum of their heat and finally exiting the chimney/stack at a low temperature.
Benefits in Industrial Applications
Here are the top benefits of three pass steam boilers:
- Due to its multiple stages, its thermal efficiency is very high.
- Less fuel is required compared to other boilers.
- As heat is uniformly distributed in the chamber, stress on any particular part of the boiler is eliminated.
- Cleaner combustion means lower smoke settlement and easier maintenance.
Conclusion
The three pass steam boilers are a revolutionary design that makes the best use of energy stored in the combustion gases. They reduce the fuel consumption in the boilers, hence saving the energy cost of the industries. Sun Boilers Pvt. Ltd. is the top manufacturer of industrial boilers. We provide them in different capacities to suit the diverse requirements of our clients. If you want to buyu from us, get in touch with our team.
