Treatment methods for ammonium salt crystals
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In single-tower wastewater stripping (where both hydrogen sulfide and ammonia are removed from the top of the tower), the area behind the safety valve at the tower top is often clogged with ammonium salts, which prevents the safety valve from functioning properly. This happens every time we carry out maintenance, and the blockage is quite severe. What could be the reason for this? Do anyone have any good solutions?
Enhance insulation and heat tracing. The formed ammonium salts are rinsed with water at 80 degrees.
A base injection system can be considered to remove organic ammonium salts
The temperature of the aminoacid-containing gas should be maintained at least at 85°C; otherwise, ammonium salt crystals will form and block the pipelines.
Under certain temperature conditions, hydrogen sulfide and ammonia emerging from the top of the stripping tower react to form ammonium salts, which crystallize at lower temperatures and cause blockages in pipelines and equipment. To prevent ammonium salt crystallization, it is necessary during production to inject a certain amount of deoxygenated water into the effluent (at the inlet of the air cooler) to dissolve the ammonium salts and carry them away.
Hehe, it should be washed with warm water I guess
Hydrogen sulfide and ammonia readily form ammonium salt crystals at low temperatures, which can be washed away with hot water； During operation, try to keep the top temperature of the tower above 85 degrees; otherwise, not only will salt form at the outlet of the safety valve, but salt will also form on the tray.
Control the top temperature of the tower, washing with water, and washing with alkali
Under normal production conditions: to prevent the crystallization of ammonium salts, it is necessary to inject a certain amount of deoxygenated water into the effluent (at the inlet of the air cooler) during production, in order to dissolve the ammonium salts and carry them away. In case of abnormal production: acid can be used for cleaning