When do you know if your decarbonation system needs service?
When a degasification tower or decarbonator become fouled there are several indicators that identify you may have a problem or its time to clean your system. If the efficiency of the degasifier has dropped you will see an increase consumption rate of chemicals. If you are removing less H2S in the degasifier your chlorine consumption will increase. When you increase the amount of chemical reaction occurring in the water, you will see an increase in the TSS levels and drop in water quality. As the H2S reacts with chlorine more solids will form and be present in the water and the water quality will diminish.
Another indicator of a fouling condition is the adjustment of pH in the Industrial Water Treatment industry you are required to meet the set standards. As performance of the tower drops the removal of CO2 will also drop leaving a higher pH level than may be desired. A quick inspection to check out the media bed should be performed. Also, do not forget to inspect the distribution system at the top of your tower and remember that all distribution systems are not alike and to inspect the condition of each of them may require additional efforts on your part. With a header lateral system you need to inspect the distribution nozzles but with a Weir or Tray type you will need to check the amount of scale or fouling that is building up on the Weir edge or int the bottom of the pan. If the Weir edge becomes fouled unevenly it will create "Channeling" of the water and an increase in the initial hydraulic load to a concentrated point on the media bed.