Problems with ammonia side-stream extraction in the wastewater stripping tower
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My unit uses a single-tower side-stream extraction process; the usual extraction temperature is around 150 degrees. I read in some materials that if this temperature remains at around 140 degrees for an extended period, it can cause blockages in the side-stream extraction system. I’m not sure if this is true or not. Please share your opinions – thanks, points will be given!
It is said to be no less than 138 degrees; below 138 degrees, carbon dioxide reacts with ammonia to form salts that cause blockages.
The side-line temperature has a direct impact on the ammonia nitrogen level in the purified water; if the extraction volume is too low, the side-line temperature drops, resulting in unsatisfactory ammonia nitrogen levels in the purified water (the ammonia peak shifts downward, and the large amount of hydrogen sulfide extracted causes ammonia hydrosulfide crystals to form and block the side line)； The extraction is too large, resulting in excessive quality of the purified water and high energy consumption.
Here, we usually keep it around 139 degrees