Recycling gas recovery issues at refining stations
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What is the component content of the regeneration gas i at my refining station after it has been recycled through the first ammonia recovery tower and the second ammonia recovery tower, and what are the co, co2, and NH4 respectively? Does your company recycle the regeneration gas? Please give me some advice?
You should be asking about the NH3 content. CO and CO2 do not need to be considered, but the lower the NH3 content, the better. If the ammonia content is high, the problems reflected are: first, the regeneration temperature control is too high, and the ammonia consumption is large; second, the absorption effect of the ammonia purification tower is poor; and the high ammonia content easily reacts with CO2 to form ammonium carbonate crystals, which blocks pipeline equipment.
The general situation is that the CO content is more than 50% and the CO2 content is less than 5%. Based on the fact that the imported CO for refining is generally less than 2%, it can be roughly estimated that the regeneration gas volume is more than 100 cubic meters per ton of ammonia. The recovery value is very high. If the quality of the copper liquid is poor, the outgassing of the copper tower will be serious, and the regeneration gas volume will be greater. The content of NH3 has a great relationship with the regeneration temperature. There was a time when the ammonia content at the outlet of the reflux tower reached more than 20%, and the ammonia water output was quite high.
CO60 % CO2 3 % Our general NH3 is around 5%, and the regeneration temperature is controlled at around 70 degrees. Add NH3 based on imported CO2