Sponge iron filter (also called oxygen scavenger) using high-quality ore, the use of oxidation-reduction reaction principle-pass filtering the precipitate manner to exclude water dissolved oxygen content can be achieved after treatment for pipes, boiler circulating water dissolved oxygen corrosion 0.05 mg / L below the oxygen scavenger Backwash frequency is low, high compressive strength, not powder that does not bear the board, a large surface area. High activity, and regeneration. 
 Oxygen scavenger activation treatment of sponge iron, showed a sponge-like porous particles of iron, dissolved oxygen in water to provide the opportunity to react with the active iron, accelerate the oxidation-reduction reaction, it is a chemical reaction with dissolved oxygen in water are as follows: fe + H2O, +1 / 2O2 → of Fe2 + +2 of OH-of Fe2 + +2 of OH-+1 / 2H2O +1 / 4O2 → Fe (OH) 3 ↓ range of applications: can be used for a variety of boilers, heat pipes pay, industrial circulating cooling water, etc. need to remove the dissolved oxygen in water place. 
 First, the works 
 At room temperature filter deaerator is a chemical deoxygenation, which uses a specialized production activity of sponge iron (direct reduced iron) to remove dissolved oxygen in water, the main component of the sponge iron is iron, its porous internal structure, specific surface area is common oxygen and iron of 5-10 times of iron in water can occur quickly and thoroughly oxidation, dissolved oxygen stable below 0.05mg / L, the reaction is: 2Fe2 + + 2H2O + O2 → 2Fe (OH) 2 4Fe (OH) 2 + 2H2O + O2 → 4Fe (OH) 3 reaction product of Fe (OH) 2, Fe (OH) 3 for the flocculent precipitate, readily soluble in water with the water flowing through the rest of the sponge iron particles intercept them, as long as a certain intensity of backwash water can rinse (about 5 minutes). Low consumption of sponge iron, according to the different treatment of water and water quality, generally 3-6 months added once. (Deoxygenated in a small amount of iron ions, usually 0.2-0.5mg / L, still conform to the national water quality standards for the hot water boiler, but steam boiler or the water supply of Fe2 +, the stringent requirements of water supply deaerator is the installation of iron removal device to remove the water of Fe2 +, The Center offers a variety of ion exchange in addition to iron device for the user selected.) as the water deaerator 
 Or so. Replacement reaction because of the restore process, the formation of the gap of a certain amount of powder particles bonded gap, making the high oxygen scavenger pore, large surface area, but also because of the primary ore direct reduction of income, relatively pure, so The activity is extremely high, the electrode and the oxygen produced by the reaction of Fe3O4, so as to achieve the deaerator purpose. Utilization has also been increased to more than 90%. 
 And because a certain amount of impurities in the oxygen removal process between the particles can only be a weak bond, connection, basic stainless steel die into the group. The use of the product by the number of units, the results are quite satisfactory, the water oxygen content is reduced to below 0.05 mg / L, only consume about 25g per cubic meter of water, truly high-quality, low-cost run. Easy to make without softening the water oxygen scavenger surface passivation, so that the oxidation slows down, which will affect deoxidizing effect, it should soften again deaerator. Use for some time after backwashing. 
 Second, the sponge iron main technical characteristics: 
 The sponge iron deaerator technology and works with the following characteristics: 
 ? At room temperature, oxygen, water without heating; 
 ? System at any time the water supply can be no time to prepare, no deaerator tank; 
 ? Deoxidizing effect is stable and reliable, the dissolved oxygen content of the stability of ≤ 0.05 mg / L, the low-pressure boiler water quality standards; 
 ? To install no special requirements to overcome the heat and high vacuum deaerator must install the inconvenience; 
 ? Equipment can be low arrangement, simple process, and excessive height requirements. 
 Features: new sponge iron filter deaerator in the country have been available for several years, early in the design of device structure and process in actual operation, there are some inadequacies were gradually exposed, and sometimes a great impact on system operation. 
 Combined with practical experience of several users, new design ideas for the inadequacies of the early design, the center uses imported components and advanced control technology design and production of sponge iron filter deaerator, has the following characteristics: 
 ? Process more simple and reasonable, the device structure is simple, compact, easy operation and maintenance; 
 ? Control a high degree of automation, the system can automatically based on time or pressure loss backwash, no manual backwash timely elimination of the oxygen scavenger agglomeration reduce water consumption, so that the equipment is always in good working condition; 
 ? Dual-chamber structure of two-tank structure or a single tank equipment, continuous water production, water pressure is sufficient, even in the backwash without interrupting the production of water, so that after the work of the class system is more stable and reliable; 
 ? Anaerobic water backwash device automatically, to further improve the backwash effect of reducing water consumption, consumption of oxygen scavenger. 
 ? Automation system power consumption is very low, equipped with manual override, the backwash operation requires only one button. 
 , Sponge the physical and chemical properties analysis: 
 Specific indicators of the performance of the project performance of project specific indicators 
 Active iron is ≥ 96% bulk density 2.7-3.0g/cm3 
 Hardness of 5 - 7 nonuniform coefficient k80 ≤ 1.8 
 Porosity of 30-50% ash content <0.5% 
 Other metal content does not exceed the national drinking water standards 
 Particle size range 1 - 3mm 3 - 5 mm - 7 mm,