Desulfurization process of flue gas or waste gas by using external regenerative cycle magnesium sulfate method

Desulfurization process of flue gas or waste gas by using external regenerative cycle magnesium sulfate method

CN
  • CN 101,607,173 B
  • Filed: 06/17/2008
  • Issued: 05/23/2012
  • Est. Priority Date: 06/17/2008
  • Status: Active Grant
First Claim
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1. the sulfur removal technology of using external regenerative cycle magnesium sulfate method flue gas or waste gas is characterized in that it comprises the following steps:

  • Flue gas or waste gas that step 1. will contain sulfur dioxide are introduced the absorption tower continuously;

    Absorb the sulfur dioxide in flue gas or the waste gas with the circulation of magnesium sulfite absorption liquid;

    Make the magnesium sulfite in the absorption liquid change into magnesium bisulfite, remove the sulfur dioxide in flue gas or the waste gasStep 2. with the absorption tower at the bottom of absorption liquid distribute the outer regenerative system of part or all of entering tower, regenerate with the magnesia slurry reaction,Step 3. is filtered the regenerated liquid of step 2 gained;

    Reclaim the magnesium sulfite solid, filtrating turns back to the absorption tower absorption that circulates, constantly with the sulfur dioxide removal in flue gas or the waste gas;

    Filtrating after the described regeneration is clear liquid or solid-liquid mixing suspension;

    The mass ratio of its solid content is 0-1.5%, and its liquid phase main component is the aqueous solution of magnesium sulfite and magnesium sulfate, and the solid phase main component is magnesium sulfite, magnesia and/or magnesium hydroxide.

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