Particle analysers are commonly used to identify and potentially quantify the presence of solid particles in a gas mixture. Several technologies exist to measure particle rate, and the choice varies according to the application datasheet .
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Dust analysers are generally used to detect and possibly quantify the presence of solid particles in a gas mixture.
Depending on the application, manufacturers use the two most advanced technologies/methods:
The following table shows the most suitable method and the ideal Fuji Electricanalyser according to the function required:
| Function / method | 1 analyser process dust | 2 analyser of dust emissions |
|---|---|---|
| A Light backscattering (LED optical technology) | - | ZFDM-4 |
| B Inductive electrification (advanced triboelectric technology) | ZiDM-3 MONIDUST | ZiDM-5 QALDUST or ZiDM-4 EMIDUST |
When it comes to emissions monitoring, i.e. when a CEMS is required, both technologies are possible. And the choice will depend on the application's datasheet .
The following paragraphs explain in more detail how to select the ideal dustanalyser for your application.
Dustanalyser is used to detect the presence of solid particles or to quantify the concentration of solid particles in a gas stream.
Here are just a few examples:
For process applications, the ideal particle monitoring technology is the inductive electrification method.
This is the most advanced evolution of the famous "triboelectric" method. We explain the difference in the technical description of the ZiDM series.
In many cases, solid particles flow through a small-diameter pipe. The inductively electrified dustanalyser can be configured for small and medium-diameter pipes.
When the dustanalyser is used to measure the concentration of solid particles released into the atmosphere as a result of combustion or other industrial processes, both technologies can be used.
Thanks to their innovative design, Fuji Electric's QAL1-certified dust analysers meet these 5 conditions, with each of the 2 leading technologies:
When should you choose an inductively electrified dust analyser for continuous atmospheric emission monitoring (CEMS)?
They will then use one or the other of the 2 technologies depending on the following parameters:
Is it possible to use a triboelectric dust analyser when the combustion plant is equipped with an electrostatic precipitator?
The answer is no... but...
So, finally, YES, Fuji Electric ZiDM Series dust analysers using advanced inductive electrification technology, can be used even when electrostatic precipitators are present on the installation.
The only case in which the measurement will be disturbed is when the ZiDM Series dustanalyser is located just downstream of the electrostatic precipitator. However, in most cases, flue gas treatment equipment and/or sufficient distance are present between the electrofilter and the dustanalyser . For example :
When should you choose a LED backscatter optical dust analyser for emission measurements (CEMS)?
We use LED backscatter optical dust analysers when :
See Fuji Electric ZFDM-4 technical description for detailed explanations.
In all other cases, the manufacturer is free to choose either technology.
If in doubt, Fuji Electric France's experts and partners will be happy to help you choose the best solution for your dust monitoring application.
