Ammonia vapor crystallization……
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I would like to ask everyone: our factory uses the HPF method for desulfurization. The ammonia pipeline for ammonia vaporization is inserted below the circulating liquid tank, with the circulating liquid forming a water seal. Recently, the ammonia pipelines in our plant have been constantly clogged, causing the pressure at the top of the ammonia vaporization tower to rise. It had never been blocked before. Upon opening the pipeline, yellow crystals were found inside, similar to chicken flavoring… We believe that the increase in temperature of the ammonia solution after passing through the ammonia cooler may have led to an increase in the amount of ammonia trapped within it. Once this ammonia was sealed by the liquid, it pushed back, causing an increase in the pressure inside the tower. So here’s the question... 1. Has anyone had a similar experience? Is our analysis correct? Are there any good ways to avoid clogs... 2. What are those yellow crystals? I checked that ammonia crystallizes only at -70°C; so what exactly is this? ? I hope everyone can help this young guy analyze it; thanks a lot~
The yellow crystals are organic substances in the desulfurization gases, not crystals of ammonia
Thank you~~~ What causes pipe blockages? Have you encountered a similar situation?
Thank you~~~ What causes pipe blockages? Have you encountered a similar situation?
The remaining ammonia solution before ammonia evaporation should be pre-treated to remove the oil present in it. Our company has also encountered this problem: yellow crystalline substances that are oily in nature; if such substances are placed somewhere for a while, they will evaporate.
Our company is in the same situation; please check whether the amount of caustic added is sufficient and whether the pH level has been reached Also, is the residual ammonia oil removal system working properly?