At Enurga, we have found many advantages of measuring planar temperature in flames. Fire is a result of combustion – a chemical reaction between a fuel and oxygen – and when there is enough heat, flames are formed.

1. Spray Drying: Know About Stages, Equipment and
Diagnostic Tools
When we encounter the term ‘spray drying’, it seems simple enough. However, this is not the case
because there are so many facets of this complex process that you need to clear in order to understand
this process thoroughly. For those who are new to this process, we will start the discussion from the
most basic question and then proceed to other specific questions to learn about this process more. Let’s
check them out.
What is spray drying?
Spray drying is a process of producing dry powder from a liquid material or slurry by spraying particles
into the current of hot gas or air. When particles come in contact with hot gas or hot air, the water
content of particles evaporates quickly. Thus, you obtain dry powder as the end product of this process.
This process is widely preferred for drying several thermally sensitive materials such as food and
pharmaceuticals.
What are the stages of spray drying?
Atomization – the first stage
The process of spray drying initiates with atomization. During atomization, a nozzle or rotary atomizer
turns the liquid feedstock into small droplets. Desired viscosity and particle size are achieved during the
atomization process.
Drying process – the second stage
When small liquid droplets exit the nozzle or rotary atomizer, they need to be dried quickly to form a
powder which can be easily stored and transported. This process is usually carried out by using air that

2. has been heated with natural gas. The desired moisture level of the powder is controlled by fine-tuning
the temperature of that hot air.
Recovery process – the third i.e. final stage
The recovery process just takes a few seconds to recover the dried powder from the exhaust gas with
the aid of bag filter or cyclone.
What equipment is used for spray drying?
For this process, different types of spray dryers are used. Each spray dryer has different features to meet
the various spray drying needs. Generally, spray dryers are used for chemicals, pharmaceuticals and
food products such as corn syrup, starch, molasses, honey, rice protein, dairy products. The basic parts
of a spray dryer include spray nozzle/atomizer, feed pump, air heater, air disperser, drying chamber,
powder recovery systems and process control systems.
How to ensure a good quality product is produced from a spray dryer?
Diagnostic tools are used in order to study the quality of spray patterns which are known as
patternators. They help in quantifying the spatial location of the droplets emitted from a spray dryer and
visualize the pattern of sprays. The most common tool to study patternation is optical patternator.
There are also several other devices available in the market which assist you in spray drying, imaging,
characterization, and analysis. Apart from this, several factors like spray angles, particulate velocities
and densities are also measured to provide high quality results.
So, these were the answers to common questions related to spray drying. If you’re also thinking of
running a business of spray dryer products, you should hire services such as optical patternation, drop
sizing, spray analysis, spray drying and others in order to ensure the high quality production.