Sponge iron filter (oxygen scavenger) using high-quality sponge iron, the use of redox principle, except through the filter precipitate manner excluded after pipes, boilers and circulating water dissolved oxygen corrosion of the treated water dissolved oxygen content can be reduced 0.05 / L or less, and the oxygen scavenger having backwash frequency is low, high antioxidant strength, not powder, not compacted, large surface area. activity, good regeneration effect, full compliance with state water quality standards for boilers. After activation treated In addition to sponge iron level agents, to multi-cavernous gap iron particles, the dissolved oxygen in water to provide an opportunity to react with active iron.
Sponge iron filter main technical parameters: sponge iron has good reduction activity and high specific surface area characteristics, as water oxygen scavenger sponge size is 2-5mm, high porosity, large surface area, high activity, vulnerable and reacts with oxygen in the water to generate Fe3O3, so as to achieve the purpose of oxygen, the reaction product is readily soluble in water flocculent precipitate, was blocked off, with a certain intensity of backwash water can rinse. 1, the working principle of oxygen at room temperature filter is a chemical oxygen, which uses specialized production of reactive sponge iron (DRI) to remove dissolved oxygen, the main component of sponge iron, its porous internal structure, specific surface area is provided by ordinary iron 5-10 times, can make the water of oxygen and iron oxidation reaction occurs quickly and thoroughly, so that the dissolved oxygen stable at 0.05mg / L or less, the reaction is:
2Fe2 + + 2H2O + O2 → 2Fe (OH) 2 4Fe (OH) 2+ 2H2O + O2 → 4Fe (OH) 3
The reaction product of Fe (OH) 2, Fe (OH) 3 is readily soluble in water, flocculent precipitate, when as the water flows through the rest of the sponge iron particles are blocked off, as long as a certain intensity of backwash water can rinse (about 5 minutes).
Sponge iron consumption is very low, depending on the quantity and quality of treatment, usually 3--6 months supplement once.
Index Name Index Name
Name Unit Value Name Unit Value
Activated carbon% ≥85 SiO2 + Al2O3% ≤5.5
Compressive strength N / P ≥3500 S% ≤0.013
Drum index + 2.5mm% ≥90 P% ≤0.06
Engage mill index 1-mm% ≥10 Bulk density T / m3 2.2
The specific surface area m2 / g ≥80 As SN Sb Bi Pb Cu (each) 0.002%
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