AN OVERVIEW OF APPLICATIONS OF INDUCED DRAUGHT FANS IN POWER PLANTS
                     AN OVERVIEW OF APPLICATIONS OF INDUCED 
DRAUGHT FANS IN POWER PLANTS
Neel Rao
Writes on Reitzindia Induced draft fan and 
Reitz India's ID Fans and FD Fans.
Induced draught (ID) fans and forced draught (FD) fans are crucial elements in any 
plant involved in the generation of power. Both these blowers fall under the 
category of centrifugal fans. These two types of fans, also called blowers, are of 
equal importance in power plants. The words draught fans and draft fans mean the 
same, with the spelling changing based on British or American English usage.
But, the focus of this article is going to be confined to having an understanding of 
the role of ID fans. How the induced draft fans contribute towards enhanced 
efficiency and minimized pollution in these plants is what is going to be explained 
here.
• The ID blower addresses the pivotal aspect of gathering the gasses and other 
noxious substances present within the system, and expelling them into the outside 
atmosphere. They achieve this objective by generating negative pressure.
• The induced draft fans are generally installed near the boiler system’s outlet 
typically in the middle of the chimney and dust collector. That is imperative because 
it’s only then that they can serve the desired purpose.
• By promptly eliminating the gasses and other contaminants, the ID fans make sure 
that the combustion process progresses smoothly within the boiler system. This 
automatically enhances the overall efficiency of the system.
• Because the ID fans work in conjunction with the FD blowers, the airflow remains 
consistently balanced inside the boiler. This is again a paramount aspect when it’s 
the question of making the system operate more efficiently.
• When the risk of fire is taken into consideration, the induced draft blowers are way 
safer than the FD variants.
• The ID blowers are more susceptible to issues such as erosion and corrosion when 
compared with FD fans. As a result, the blades of the induced draft versions are 
either backward inclined or forward curved. This particular design ensures that 
these blowers can withstand harsh conditions to a substantial extent. They can do 
full justice to the job for which they are deployed.
• The design of a typical induced draft blower is such that the quantity of energy it 
consumes is relatively lower. Consequently, these fans enable the power plant to 
significantly reduce the costs specific to energy, over a period of time.
• The ID fans are manufactured in such a way that the levels of noise emitted by 
them are not high. Therefore, there is less noise pollution within the plant; a 
comfortable work environment can be provided for the employees. Here, it also has 
to be mentioned that as the fans quickly remove the gasses and pollutants, the well-
being of the staff is protected.
• The presence of ID blowers can be of real help to a power plant only if proper care 
is taken of these devices. Because ID fans have a higher level of vulnerability to 
various types of damage, the company is required to take the utmost care. Instead 
of allowing any problem to manifest, the plant should concentrate on preventive 
maintenance of induced draft fans. This drastically reduces the chances of major 
repairs involving huge costs.
• Businesses have to note that there is no standard model of ID fan suitable for all 
power plants. The appropriate blower varies from one plant to another. It depends 
on the precise requirements, which are varied for different factories.
About REITZINDIA
Reitz India has set a benchmark to deliver high quality fans for heavy duty industries 
which can work at precise operating conditions like high temperatures and 
pressures. Reitz offer idealistic Centrifugal Fan and Centrifugal blower design that 
can be used in all large scale process industries like cement, iron & steel, power 
plants, fertilizers/ chemicals and more.
Thank you for spending your precious time in reading this article!