Electro-inductive dust monitor - ZiDM-3 MONIDUST
ref : ZiDM-3 DiscoverDust 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.
Dust 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) | S303 | S305QAL or S304 |
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 high and latest advancement of the old and famous “triboelectric” measurement method.
We explain the difference in the Fuji Electric S300 Series technical description.
The solid particles in many cases are flowing through a small diameter duct. The inductive electrification dust monitoring equipment can be configured for both medium and small-diameter ducts.
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 the Fuji Electric S300 series dust monitors, using inductive electrification technology are used even when the particles are filtered by an ESP.
The only case where it is not possible is when the S300 series dust monitor is located right downstream of the ESP. But in most cases, there are some distance and/or flue gas treatment processes between the ESP and the dust monitor, such as :
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.