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Ion-exchange resin pollution and treatment

Country/Region china
Company Shanghai HuiZhu resin Co., LTD
Categories Water Treatment Coagulant
Telephone +86-021-59936779 59937571,1370197201
ICP License Issued by the Chinese Ministry
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    Ion-exchange resin pollution and treatment

    A suspended, the fouling and processing
    The raw material will be blocked pore, thus the resin layer increases the flow resistance, increase the operation pressure drop, will cover in the surface, resin particles and resin work exchange capacity.
    In order to prevent the fouling material, mainly is to strengthen the pretreatment of raw material, in order to reduce the content of water. To remove the accumulated in resin layer can be used to increase the material, time and number of washing or using compressed air scrub etc.
    Common salt chemistry of water system are as follows: the average suspended

    Salt chemical elementSuspended (mg/L)

    Acid Yang (downstream regeneration)<5

    Acid Yang (convection regeneration)<2

    Acid Yang (bed)<2

    Yang (acid) and Yang (reagent regime of floating bed)<5

    Yang, double bed room double bed<2

    Yang double bed room<2

    Yang (nr) and Yang (downstream reagent regime)<5

    Yang (nr) and Yang (reagent regime of floating bed)<5

    Second, the pollution of iron and processing:
    Yang and Yin resins are possible contamination of iron. The appearance of the contaminated resin brown, serious when can become black. Normally, each containing iron content of resin is 100 gold than 150mg, should undertake handling. The existence of iron will accelerate the degradation of Yin resin.
    Yang resin, the water into the use of iron ion in Fe2 +, most of them are resin absorption, oxidation, part for Fe3 +, regeneration of H + cannot completely were stranded in exchange resin, thus causing pollution of iron. Use as a coagulant physico-chemical process, Yang flower bed "part into the role of accumulation, filtration, regeneration in resin layer surface, acid dissolution adenophylla flower, make it become part Fe3 +, resin was caused by the pollution, and iron. The Fe3 large industrial hydrochloric acid and + a resin iron pollution. For sodium ion exchange resin were more vulnerable to the pollution of iron.
    Yin resin iron sometimes resin than many times. Yin resin regeneration liquid iron mainly comes from. The general method of diaphragm, contained caustic soda production of Fe2O3 0.01% ~ 0.03%, meanwhile, still contain 6 ~ 7mg/L NaClO3. So in storage and transport of caustic soda and iron containers, pipe coatings (no) contact, will generate ferrate (FeO4). Ferrate salts into bed with lye, because after the Yin and the lower pH value, will occur as follows: the reactive,
    2FeO42-10H + + - 2Fe3 + + 2/3 O2 + 5 H2O
    Fe3 + Fe (OH) further formation, attached to Yin, iron resin particles on the pollution.
    After the pollution from iron resin in general, the regenerative process cannot eliminate, must use hydrochloric acid cleaning.
    The cleaning method is used by 10% in HCl in solution method, must check before switch equipment corrosion resistance, or add inhibitors must use hydrochloric acid.
    Will be equivalent to resin bed volume 0.5 percent from resin bed top HCl in solution into consideration resin bed (within the residual standing, keep the concentration), HCl in solution from the bottom of the equivalent of hydrophobic resin bed in the water, standing residual solution, and resin mix contact 12 hours. The acid leaching from succoth and then backwashing 30 minutes, remove loose material, resin bed regenerative after operation.
    To prevent the pollution of iron resin are:
    1 reduce water containing iron bed Yang. To contain iron groundwater should pass aeration and manganese sand filtration of fe. To contain iron surface or use, shall be as agglomerants physico-chemical process, such as adding alkaline reagents Ca (OH) 2, improve water NaOH or pH value, prevent iron ions into the sun.
    2 for conveying water containing iron high piping and storage tank should consider to take necessary measures to reduce corrosion, water content of iron.
    3 in the bed regenerative Yin caustic soda and storage tank pipe should be taken to reduce the rubber lining anticorrosive, alkali liquid containing iron regeneration.
    4 when the resin containing iron 150g/gR, more should pickling.
    Three of the pollution and treatment, calcium sulfate:
    Using sulfuric acid resin regeneration of calcium, if the regeneration of high concentration of slow velocity, or near the resin particles, and regeneration of the SO42 Ca2 + and solution concentration of more than CaSO4 - solubility can produce CaSO4 precipitation, and attached to the resin particles, not only after washing clean, renewable difficulties that has hardness, impact of ion-exchange, operation of the water will dissolve, hardness, reduce the JiaoHuanLiang Yang bed.
    Calcium sulfate in 25 degrees Celsius for the solubility temperature increases with 2000ppm, solubility, so it is difficult to remove.
    Prevent calcium sulfate precipitation is reduced, the measures of sulphuric acid concentration and

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