Is the steam condensate consistently substandard? Alkalinity over 20
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Fully circulating aqueous solution method: Recently, the steam condensate has often failed to meet the standards, with an alkalinity of over 20. 1. Check that all steam isolation valves are leak-free. 2. The medium-pressure steam entering the workshop is of qualified quality. 3. The heater in one absorption tower is leak-free. 4. The only exception is that the alkalinity of the condensate from one of the decomposition heaters is also above 20; logically, this should indicate a leak in that heater. What’s more puzzling, however, is that the alkalinity of the condensate from that same heater can sometimes be within normal ranges. Could everyone please consider this? I am extremely grateful!
Is the alkalinity mentioned by the poster referring to the ammonia nitrogen content? If not, it is recommended that you analyze the ammonia nitrogen content in the steam condensate at the outlet on the shell side of the decompression heater to find out exactly how much it is. If the ammonia nitrogen level is high, it indicates that there is a leak in the primary heater. Otherwise, we can only look for other reasons.
The steam parameters entering the workshop are normal, but the conductivity of the steam returning from the workshop is above the limit (with high alkalinity); it’s obvious that there is a leak, and it’s necessary to check each piece of equipment (or verify whether the measuring instruments are accurate). Over time, this can cause corrosion of the equipment, while recovering the condensed liquid is a relatively minor issue. This post was last edited by YHL512777 on 2009-4-29 17:53.]
Check whether the alkalinity of the boiler’s water is above the limit, and increase the frequency of boiler blowdown； Additionally, some desalinated water (or reverse osmosis water) has a high acidity level, and ammonia is used for neutralization; in this case, it is the alkalinity of ammonia that comes into play.