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Ammonia plant upgrading-multistage integrated chilling of process air compressor with ammonia compressor followed by air flow split and multistage air preheating to secondary ammonia reformer

  • US 9,772,129 B2
  • Filed: 08/14/2013
  • Issued: 09/26/2017
  • Est. Priority Date: 08/17/2012
  • Status: Active Grant
First Claim
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1. An upgrade to an existing ammonia plant utilizing a new direct multistage chilling system in an existing ammonia plant air compression train of the existing ammonia plant to increase process air flow to an existing secondary reformer of the existing ammonia plant comprising:

  • a. a new two stage suction air chiller in the existing ammonia plant air compression train that chills incoming process air by heat exchange with expanded high pressure ammonia from an existing ammonia compression system of the existing ammonia plant;

    b. additional new two stage air chillers between each of the existing air compressors of the existing ammonia plant air compression train, each new air chiller chilling incoming air by heat exchange with expanded high pressure ammonia from the existing ammonia compression system of the existing ammonia plant.

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