How to deal with salt deposition in acidic gas pipelines
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This post was last edited by Cao Jianqing on 2009-7-15 07:14. How to prevent severe salt deposition in the acidic gas pipelines of sulfur recovery units?
1. Crystallization of acidic gases occurs in front of the incinerator; the temperature should be increased periodically. Generally, crystallization tends to occur when the temperature is below 28°C, so it is best to maintain the temperature between 35–40°C to facilitate water separation without causing crystallization. 2. After the incinerator, crystallization occurs due to incomplete ammonia cracking when the furnace temperature is kept below 1250°C, resulting in the formation of ammonium salts crystals.
Salt formation in acidic gas pipelines occurs because acidic gas contains ammonia, which crystallizes at low temperatures (below 80°C) to form ammonium sulfate that blocks the pipelines. The use of dual steam heating at 1.0 MPa to maintain a pipeline temperature above 80°C can effectively prevent salt deposition and blockages in the pipelines.
Strengthen heat tracing, pay attention to insulation to prevent ammonia salt crystallization, and also be mindful of solvent foaming, etc