Polyferric sulfate can only be stored stably under acidic conditions (pH value of PFS stock solution is 2-3). Therefore, acid resistant materials or anti-corrosion treatment must be used for transportation, storage and liquid preparation. The specific gravity of this product is about 1.5, that is, 45 tons of polyferric sulfate can be stored in a 30m3 storage tank. If it is stored in plastic barrels, it needs to be thickened.
2. Dosing equipment of polyferric sulfate
The corrosive nature of polyferric sulfate makes its dosing pump can be made of 316L material or PTFE lining material, the transmission pipeline adopts PPR pipeline or stainless steel pipeline, and the material of the valve is the same as that of the pipeline.
3. Worker protection
When in use, short-term contact with human skin will not cause damage. Just rinse in time. It is not drinkable. When clothes come into contact with polyferric sulfate, a small amount of oxalic acid can be used for cleaning.
4. Preparation of polymeric ferric sulfate
The dilution concentration of polymeric ferric sulfate should not exceed 10 times. If the pH value is too high, it is not suitable for stable storage, but it can be prepared and used now. According to the treatment effect required by adding polyferric sulfate, a small-scale beaker test is carried out to determine the reference value of polyferric sulfate dosage of raw water quality by observing the alum formed in the beaker or effect detection. General industrial wastewater can be diluted by 1-2 times and water purification plant can be diluted by 2-5 times.
Dissolve the solid product and water in 1:10, or dilute the liquid product with 10% content by 5 ~ 10 times. The prepared aqueous solution can be placed in the alum dissolving tank and mixed with water to form an aqueous solution of 10% ~ 30%, or when decolorizing and coagulation, it can be directly added into the wastewater and stirred for several minutes for sedimentation or air flotation. Pump the prepared aqueous solution into the metering tank or directly add it to the wastewater for mixing evenly. Make it play the expected target effect. Generally, liquid products are required. It is recommended that the delivery distance should not exceed 200 kilometers from the factory, otherwise the cost plus freight will be very high.