Dust monitors 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 application specifications.
From
11387,00 € Request a quoteDust monitors are generally used to detect and possibly quantify the presence of solid particles in a gas mixture.
And depending on the application, the two most advanced technologies / methods, may be used:
The table shows globally which method is preferred for which function, and which Fuji Electric dust monitoring equipment is required for precise measurement
| Function / method | 1 - Process dust monitor | 2 - Emission dust monitor |
|---|---|---|
| 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 emission monitoring is concerned, i.e. a dust CEMS is required, both technologies may be selected. And the choice will depend on the application specifications.
The next paragraphs explain in detail how to select the right dust monitoring devices according to the application.
The dust monitoring system is used to either detect solid particles, or quantify the concentration of solid particles in a gas flow.
Here are some of the advantages:
For process applications, the preferred dust 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. Theanalyser inductively electrified dust collector can be configured for small and medium-diameter pipes.
When dust monitoring is used to measure the concentration of solid particles emitted to the atmosphere by a combustion process or any other industrial process, then both technologies may be used.
Thanks to their innovative design, Fuji Electric's QAL1-certified dust monitors meet these 5 conditions, with each of the 2 leading technologies:
When should you choose an inductive electrification dust monitor for continuous measurement of air emissions (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 monitor when there is an electrostatic precipitator (ESP) filter in the process?
The answer is no... but...
So, finally, YES, Fuji Electric's ZiDM Series analysers dust meters, using advanced inductive electrification technology, can be used even when an electrostatic precipitator is present.
The only case in which the measurement will be disturbed is when the ZiDM Seriesanalyser 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 theanalyser dust. For example:
In which case choosing an optical LED backscattering dust monitor for CEMS purpose ?
A dust monitoring system with LED backscattering technology is used when :
See Fuji Electric ZFDM-4 technical description for detailed explanations.
In all other cases, the industrial operators are free to choose one or the other technology.
In case of any doubt, Fuji Electric France experts and Fuji Electric France partners will be glad to support you in selecting the best solution for your dust monitoring measurement application.
