The method and apparatus of NH3 is obtained from the mixture comprising NH3 and sour gas

The method and apparatus of NH3 is obtained from the mixture comprising NH3 and sour gas

  • CN 102,216,217 B
  • Filed: 11/13/2009
  • Issued: 12/02/2015
  • Est. Priority Date: 11/20/2008
  • Status: Active Grant
First Claim
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1. one kind from NH 3, containing H 2s and/or CO 2sour gas and containing alcohols, ketone, nitrile and/or pyridine bases the water-soluble organic constituent of lower boiling mixture in reclaim NH 3method, wherein will from NH 3the described mixture of stripping tower uses ammonia absorption sour gas in acid gas absorption device, at the NH that the removing of acid gas absorption device top mainly discharges from sour gas 3, it is characterized in that the part stream of liquid phase being taken out from acid gas absorption device and processing, make to obtain the gaseous state NH of the volatile organic constituents content containing alcohols, ketone, nitrile and/or pyridine bases with reduction 3, make it be recycled in acid gas absorption device;

  • The part stream taken out from acid gas absorption device is fed and is different from NH 3in first stripping tower of stripping tower, the wherein volatile constituent of stripping major part containing alcohols, ketone, nitrile and/or pyridine bases, the overhead product of partial condensation stripping tower, and residual vapor is recycled in acid gas absorption device;

    The partial condensation thing of the first stripping tower is fed and is different from NH 3in another stripping tower of stripping tower, wherein by NH 3being stripped to sour gas to a certain degree makes the organic constituent containing alcohols, ketone, nitrile and/or pyridine bases be enriched in storage tank, and is recycled in acid gas absorption device by the overhead product of another stripping tower.

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