Vibration of catalytic flue hoods
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Is the vibration level of the catalytic flue gas extractor high? What are the relevant parameters? Our threshold is 80 as a high value, and 100 as an extremely high value; once this level is exceeded, operations must be stopped or the equipment removed
When we reach over 65, we switch to a backup unit, stop the smoke extractor, and replace its rotor.
On-site vibration has been measured; what is the approximate value?
For this data, do you use the on-site data as the standard?
On-site measurements are not taken as the standard, but they can still serve as a reference
Vibration is interlocked in a 4-out-of-2 manner, with alarm values and interlock values
What is your interlock shutdown value? We don’t have any interlocks here
If the difference between the two monitoring points exceeds 50nm. This indicates that there is a fault with the smoke extractor. It is necessary to examine the monitoring phase diagrams and amplitude curves to determine whether the balance has been disrupted or if the mechanical components are damaged. If scaling is the issue, it can be dealt with easily; online cleaning allows the equipment to continue operating for some time. However, if the mechanical parts are damaged, it’s time to shut down the equipment for major repairs, as it won’t be able to function for long. Continuing to operate the equipment despite its faults not only puts significant stress on the operators but may also lead to more serious equipment failures.
Here we use a four-to-two interlock, with an interlock value of 100nm.
Abroad, walnut shells or fine powder catalysts have been used for online descaling, to regularly remove the catalyst and carbon deposits that accumulate on the blades of flue gas turbines!