Gas processing method and system

Gas processing method and system

  • CN 103,338,842 B
  • Filed: 01/19/2012
  • Issued: 04/10/2018
  • Est. Priority Date: 02/01/2011
  • Status: Active Grant
First Claim
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1. a kind of method for being used to clean the gas stream comprising carbon dioxide and sulfur dioxide, it is included in carbon dioxide and removes the stageIn from the gas stream remove removing carbon dioxide;

  • Methods described includes:

    A) in the removal of sulphur stage, by make the gas stream and liquid including ammonia directly contact with by sulfur dioxide from describedGas stream is absorbed in the liquid so that the gas stream is sulfur dioxide dilution, so as to be removed from the gas streamSulfur dioxide;

    B) in the gas cooling stage, the gas stream is cooled down so that form the gas stream through cooling;

    C) in the carbon dioxide removal stage, by make the gas stream with containing ammonia liquid contact with by carbon dioxide from instituteState gas stream to be absorbed in the liquid so that the gas stream is carbon dioxide dilution and rich in ammonia, so as to from the warpRemoving carbon dioxide is removed in the gas stream of the sulfur dioxide dilution of cooling;

    D) in the ammonia removal stage, by making the gas stream directly be contacted with acidic liquid so that ammonia to be absorbed from the gas streamInto the acidic liquid so that the gas stream is ammonia dilution, so as to from the gas stream of the carbon dioxide dilutionExcept ammonia;

    AndE) gas stream of the ammonia dilution is heated in the gas heating period so that form heated gas stream;

    Wherein, at least a portion of the used liquid from stage a) is extracted and guided for making again in stage a)With, and at least a portion of the used liquid from stage d) is directly extracted out and guided for making again in stage d)With, and wherein, for cooling down the cooling liquid of the gas stream and the heating liquid of the gas stream for heating the ammonia dilutionBody is identical liquid.

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