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CARBON DIOXIDE RECOVERY APPARATUS AND CARBON DIOXIDE RECOVERY METHOD

  • US 20150298054A1
  • Filed: 03/25/2015
  • Published: 10/22/2015
  • Est. Priority Date: 04/18/2014
  • Status: Abandoned Application
First Claim
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1. A carbon dioxide recovery apparatus comprising:

  • an absorption tower in which a discharge gas containing CO2 is contacted with an absorbing liquid comprising an amino group-containing compound with steric hindrance and a reaction accelerator to allow said absorbing liquid to absorb CO2;

    a temperature regulation unit in which a first rich solution discharged from said absorption tower is heated or cooled to be a solution in which a precipitate comprising said reaction accelerator is dispersed or to be a solution comprising a reaction accelerator rich phase comprising a large amount of said reaction accelerator compared to said first rich solution;

    a phase separation unit in which a second rich solution, said second rich solution being an absorbing liquid passed through said temperature regulation unit, is separated into an amino group-containing compound rich phase and a reaction accelerator rich phase to discharge said amino group-containing compound rich phase as a third rich solution and to discharge said reaction accelerator rich phase as a reaction accelerator rich solution, said amino group-containing compound rich phase comprising a large amount of an amino group-containing compound compared to said first rich solution, and said reaction accelerator rich phase comprising a large amount of said reaction accelerator compared to said first rich solution;

    a regeneration tower in which CO2 contained in said third rich solution is separated to regenerate said third rich solution; and

    a solution mixing line through which said reaction accelerator rich solution is supplied to a first lean solution which is an absorbing liquid discharged from said regeneration tower.

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