Method for controlling sand content of water body of blast furnace INBA circulating system and flow-limiting device thereof

Method for controlling sand content of water body of blast furnace INBA circulating system and flow-limiting device thereof

  • CN 102,230,037 B
  • Filed: 06/13/2011
  • Issued: 11/12/2014
  • Est. Priority Date: 06/13/2011
  • Status: Active Grant
First Claim
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1. control a method for sand content of water body of blast furnace INBA circulating system, the described blast furnace INBA recycle system comprises granulation slag making feedwater output main line outlet valve, rotary drum screen cloth, backwater cooling tower sand removing hole, stove sand collecting tank, it is characterized in that, comprises the following steps:

  • Step 2-1;

    regulate the described feedwater output main line outlet valve under full-gear, gradually reduce the overflow section of feedwater output main line outlet valve;

    Step 2-2;

    carry out synchronous emission testing at described backwater cooling tower sand removing hole, observe the water body sand content of described stove sand collecting tank;

    Step 2-3;

    when the water body sand content of described stove sand collecting tank continues to remain within the scope of setting threshold, stop regulating described output main line outlet valve;

    Step 2-4;

    the actual overflow section of described output main line outlet valve under calculation procedure 2-3, and overcurrent latus rectum corresponding to this actual overflow section;

    Step 2-5;

    close the described blast furnace INBA recycle system, at the front end of described output main line outlet valve, one current-limiting apparatus is installed, the overcurrent latus rectum of described current-limiting apparatus is that step 2-4 calculates resulting overcurrent latus rectum;

    Step 2-6;

    make described feedwater output main line outlet valve keep full-gear, open the described blast furnace INBA recycle system.

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