The drying means of graininess aqueous gel shape cross linked polymer

The drying means of graininess aqueous gel shape cross linked polymer

  • CN 102,791,774 B
  • Filed: 03/07/2011
  • Issued: 06/29/2016
  • Est. Priority Date: 03/08/2010
  • Status: Active Grant
First Claim
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1. the drying means of a graininess aqueous gel shape cross linked polymer, it is characterized in that, it is the method that the polyacrylic acid part using ventilation type drying machine drying solid constituent concentration to be 40~

  • 70 weight % neutralizes the graininess aqueous gel shape cross linked polymer of salt, wherein, it is for main component and by acrylic acid and/or have passed through the acrylic acid of neutralization and jointly carry out in aqueous being polymerized with cross-linking agent and obtain with acrylic acid and/or its salt that described polyacrylic acid part neutralizes the graininess aqueous gel shape cross linked polymer of salt, described ventilation type drying machine uses the hot blast with temperature 130~

    230 DEG C and dew point 50~

    80 DEG C,After this graininess aqueous gel shape cross linked polymer is imported the dry section of ventilation type drying machine, in the period reaching 80 weight % more than 60% to solid component concentration, the temperature of the hot blast blown on graininess aqueous gel layer is set to 20~

    70 DEG C with this hot blast by the temperature difference Δ

    T of the temperature of mensuration after graininess aqueous gel layerThe temperature being about to be inserted into the graininess aqueous gel shape cross linked polymer before aforementioned dry section is 40~

    70 DEG C,Described ventilation type drying machine is ventilation band drier,The thickness of the graininess aqueous gel layer of the upper stacking of band of described ventilation band drier is set to 10~

    90mm,The temperature and/or the dew point that make the hot blast that described ventilation type drying machine uses carry out multistage change.

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