Method for treating sulfur dioxide smoke by using steel slag

Method for treating sulfur dioxide smoke by using steel slag

  • CN 102,101,005 B
  • Filed: 01/26/2011
  • Issued: 04/24/2013
  • Est. Priority Date: 01/26/2011
  • Status: Active Grant
First Claim
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1. method of utilizing slag to administer sulfur dioxide flue gas, by the desulfurizing agent preparation, smoke absorption, in and oxidation, precipitation deslagging operation forms, and it is characterized in that:

  • (1) preparation desulfurizing agent;

    water flushing slag, the flushing water circulation flushing arranges ion concentration gauge and acidity-basicity ph analyzer at slag washing liquid storage tank export pipeline, until wherein ion concentration and pH value reach certain requirement, becomes desulfurizing agent;

    (2) absorb flue gas;

    flue gas is sent into the absorption tower, and with being pumped to the absorption tower, through the nozzle ejection drop that nebulizes, the sulfur dioxide in the washing flue gas becomes the sulphite slurries with the slag flushing water, and slurries return to nozzle by circulating pump, repeatedly spray;

    (3) in and oxidation;

    when the part slurries reach setting value through acidity-basicity ph analyzer data measured, deliver to mixing channel, drop into lime stone, air blast, with the lime stone neutralization, forced oxidation becomes calcium sulfite and calcium sulfate, then delivers to sedimentation basin;

    (4) precipitation deslagging;

    through sedimentation, discharge solid phase calcium sulfite and calcium sulfate;

    Supernatant returns is used as the flushing slag;

    (5) purifying smoke is discharged in the top, absorption tower.

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