1. Abnormal Appearance
Abnormal color: white, moldy or black spots appear on the surface (darkening of coal carbon, gray of coir carbon).
Structural changes: pore plugging rate of more than 40%, particles broken and disintegrated or obvious cracks.
Humidity sensitive: when touching wet sticky feeling, high humidity environment (> 70%) accelerated performance attenuation.
2.Performance Indicators Decline
Adsorption efficiency: iodine adsorption value decreased to less than 60% of the initial value, toluene removal rate decreased to less than 40%.
Treatment cycle: The same concentration of VOCs waste gas treatment time is extended by 30%-50%.
Regeneration capacity: adsorption recovery rate < 20% (normal value 40%-60%).
3. Abnormal Environmental Feedback
Gas monitoring:The concentration of pollutants at the export of waste gas treatment equipment rises by more than 10%.
Odor recurrence: continuous leather smell, smoke smell or decoration odor in the purified space.
Deterioration of water quality: the turbidity of the filtered water increases by 2-3NTU, and the residual chlorine content breaks the threshold of 0.5mgL.
Equipment Operating Parameters Change
Pressure difference fluctuation: The pressure difference between the inlet and outlet of the adsorption tank increases by 50%-80% (normal pressure difference < 200Pa)
Abnormal temperature: the internal temperature of the device increases abnormally by 5-8 ° C (uncontrolled adsorption and heat release).
https://www.naturecarbon.com/wood-based-activated-carbon/wood-based-powdered-activated-carbon.html
