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    Hangzhou Leo Filter Press Co.,Ltd.
    (Zhejiang Leo Filter Technology Co.,Ltd.)

    Home >> Filter Press Operation Instructions >> membrane filter press operation instructions >>

    Filter Press Operation: Pretreatment for Slurry before Filtering from Leo Filter Press,Filter Press Manufacturer from China

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    Leo company's product prototype.

    Filter Press Operation: Pretreatment for Slurry before Filtering from Leo Filter Press,Filter Press Manufacturer from China

    Filter Press Operation: Pretreatment for Slurry before Filtering from Leo Filter Press,Filter Press Manufacturer from China

    Slurry Pretreatment with Flocculent Material Before Filtering,Get Better Filtering Efficiency


    Chemial Flocculant Agent


    1.acid and alkali


    the normal acid and alkali,such as H2SO4,HCL,NaOH,Ca(OH)2 etc,to adjust PH value


    2. AlCl2.6H2O


    20% Al2O3 water solution(AlCl3.6H2O)is the main resource for Al+


    3.Al2(SO4)3.18H2O


    4.(Al2(OH)nCl6-n)m PAM


    5.FeCl3.6H2O


    6.FeSO4.7H2O


    Natural Flocculant Agent


    1. starch


    insoluble in water,it will trun to sticky,half clear colloid


    2.osseocolla,gelatin


    3.Guar gum


    4.Tannic acid


    5.Sodium alginate


    How to choose flocculant agent


    It is a hard work,and also very complicated,there are many factorrs will insult the sizing,such as solid content and mixing degree,price and its sales channels,application,dangerous,etc.


    Other chemical and physical Method


    1. adjust solution PH value


    2.decrease viscocity


    to decrease viscocity can increase filtering efficiency,to get less moisture content filter cakes and higher solid content for the cakes


    3.degas


    by filtering with high pressure,heating or filter by vaccum method to decrease operation cost


    4. freezing


    not economic,only for hazard wastes


    5. super sonic


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