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System and method for treating a flue gas stream

  • US 20050201914A1
  • Filed: 03/07/2005
  • Published: 09/15/2005
  • Est. Priority Date: 03/12/2004
  • Status: Active Application
First Claim
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1. A method for treating a flue gas steam, the method comprising the steps of:

  • combusting a carbonaceous fuel in a combustion furnace to form a flue gas stream, wherein the flue gas stream comprises water vapor, particulate matter, and at least one strong acid compound;

    injecting a sodium sorbent into the flue gas stream downstream of the combustion furnace;

    calcining substantially all of the sodium sorbent in the presence of the flue gas stream to form a soda ash;

    reducing the concentration of the at least one strong acid compound in the flue gas stream by reacting the at least one strong acid compound with the soda ash to form a sodium based by-product; and

    changing the chemistry of the flue gas stream to reduce the overall average particulate matter resistivity.

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