There are various kinds of fans applied in industries that raise the capability of numerous industrial operations. The significant of these fans are the induced draft(ID) fans, forced draft (FD) fans, primary air(PA) fans, and secondary air(SA) fans.

1. INDUSTRIAL IMPLEMENTATIONS OF
PRIMARY AIR AND SECONDARY AIR FANS
Neel Rao
Writes on Reitzindia industrial fan manufacturers &
Reitzindia high power industrial fan

2. There are various kinds of fans applied in industries that raise the capability of
numerous industrial operations. The significant of these fans are the induced
draft(ID) fans, forced draft (FD) fans, primary air(PA) fans, and secondary air(SA) fans.
Before we go into the implementations of primary air- secondary air fans in the
industrial sector, Let us learn about the contaminants. There are two types of
contaminants – prime and minor contaminants. Prime contaminants are
contaminations formed and discharged straight from specific sources such as carbon
monoxide, nitrogen oxide, and sulfur oxide. Minor contaminations are formed by
chemical process due to the impurities present in small quantities.

3. Now we shall have a glimpse of PA and SA fans. Primary air fans or PA fans are high-
pressure fans applied in the boiler power plants to provide the air for the shipment
of coal straight from the grinder to the heater. PA fans provide positive force
upstream of the coal grinder and also provides combustion air to the furnace.
Whereas; secondary air fans are said to be additional air that must be supplied for
the entire burning of the fuel.
It is supplied through the nozzles installed on the barriers of the heater. The PA fans
are apt for supplying positive force upstream to the grinder, controlling the coal and
air amalgamation into the heater. These fans have a vital role in power plants
because they provide the combustion air for burning fuels and sustaining the
coveted temperature in the heater.

4. Different implementations of PA-SA fans:
For the combustion of any fuel, three fundamental elements are required. They are
fuel, air, and heat. Air is supplied for burning to retaliate with the fuel following its
stoichiometric proportion. But in reality, some amount of air supplied for burning
goes unused. It occurs because of the fuel volume, which is fed instantly.
Primary air fans assist in separating the fuel molecules so that fuel molecules
combustion occur in effeciently with the air followed by well-organized burning of
fuel molecules. The air before getting into the boiler is prepared to transit an air pre-
heater (APH) where the air shaft to the boiler becomes heated by the departing
smoke duct, and this preheated air supports in lessening the damp content of the
fuel and in addition to raising the boiler productivity.

5. The PA fans are tremendously beneficial in plants where there are steam boilers with
an external heating system. Many industrial process design specialists firmly
articulate that secondary air fans are not only elective. However, it is essential if the
burning procedure is to be appropriately accomplished.
It is significant to note that the proper quantity of air is being provided in every
phase. It is from the viewpoint of pulling down the heat in burning and clearing the
way for the diffusive shifting of heat.
In this article, we have seen the importance of primary air and secondary air fans for
the efficient operation of manufacturing process in certain industries.

6. 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!