Iron And Manganese Removal Filter (supplier)

Manganese sand filters, also known as iron-manganese removal filters or iron-manganese filters, are primarily used to remove iron and manganese ions from water. Iron and manganese are present almost simultaneously in groundwater, especially in northern my country and areas rich in iron and manganese ores. High iron content in water creates a ferrous odor, affecting the taste. This can severely impact product quality in various chemical industries, such as papermaking, textiles, printing and dyeing, and leather refinement. For drinking water, my country's "Standard for Drinking Water Quality" (GB5749-85) stipulates that iron content must be ≤0.3 mg/L and manganese content ≤0.1 mg/L. Raw water exceeding these standards must undergo iron and manganese removal treatment. Long-term consumption of water with excessively high iron and manganese content can also seriously affect health. In recent years, the Chinese government has paid close attention to rural drinking water safety and has invested heavily in treatment.

1. Working principle of manganese sand filter Iron and manganese removal filters use oxidation to convert low-valent iron and low-valent manganese ions into high-valent iron and high-valent manganese ions, which are then removed through adsorption filtration to reduce the iron and manganese content in the water. Water with excessively high iron and manganese content is generally treated by oxidizing dissolved divalent iron or divalent manganese into insoluble trivalent iron or tetravalent manganese compounds. Adsorption filtration using a manganese sand filter can remove the iron and manganese. The chemical reactions that occur during the oxidation process are as follows:

4Fe2++O2+10H2O=4Fe(OH)3+8H+
2Mn2++O2+2H2O=2MnO2+4H+

The iron and manganese removal filter adopts well pump residual pressure jet suction, tubular mixed dissolved oxygen, disc-type water degassing, filter bed contact oxidation filtration and other processes, moving the in vitro aeration and oxidation of traditional equipment into the interior of the equipment. The equipment can be operated only by the residual pressure of the well pump, with significant advantages such as low energy consumption, simple process, stable performance and low comprehensive investment. 1. Aeration method: On the one hand, it increases the dissolved oxygen in the water; on the other hand, it removes CO2 to increase the pH value of the water, oxidizes the divalent iron into trivalent iron, and then precipitates it through filtration. 2. Filtration: On the one hand, it removes the flocs formed by ferric iron; on the other hand, it catalyzes the oxidation of most of the unoxidized ferrous iron and the ion exchange of ferrous metals to achieve the purpose of iron removal. The filtered iron sludge can be recycled and reused. Among them, there are two types of filter media: quartz sand and natural manganese sand. The former is used for raw water with an iron content below 4 mg/L and a pH value above 6.8; the latter is suitable for raw water with an iron content below 20 mg/L and a pH value above 6. The principle of manganese removal is the same as that of ferrous iron removal. 2. Technical selection instructions for manganese sand filter 1. Equipment selection

① Depending on the water quality, you can choose a primary or secondary treatment system, and according to the water volume, you can choose a single or multiple parallel systems.

②The process flow of iron and manganese removal should be determined according to the following conditions: a. When the raw water iron content is ≤10mg/L and the manganese content is ≤0.5mg/L, a single-stage treatment system is used. When the iron content is <20mg/L or the manganese content is >1mg/L, a two-stage iron and manganese removal treatment system is used. b. When the raw water iron content is ≤2.0 mg/L and the manganese content is ≤1.5 mg/L, the following methods can be used: raw water aeration-single-stage filtration to remove iron and manganese. c. When the iron or manganese content of raw water exceeds the above values, it should be determined through experiments; the following methods can be used: raw water aeration - oxidation - primary filtration to remove iron - secondary filtration to remove manganese d. When the iron removal is affected by silicate, it should be determined through experiments. If necessary, the following process can be adopted: raw water aeration - primary filtration to remove iron (contact oxidation) - aeration - secondary filtration to remove manganese

③ The pH value of the water before filtration in the manganese removal filter should be above 7.5, and the iron content of the water before filtration in the secondary filtration manganese removal filter should be controlled below 0.5 mg/l.

3. Technical parameters of iron and manganese removal filter

1. Filtration speed: 6-8m3/h

2. Working temperature: normal temperature working pressure

3. Backwash compressed air volume: 18-25L/m2.S
4. Filter material layer height: 1000-1200mm

5. Backwash intensity: 12-15L/m2.S; backwash time: 4-6 minutes

4. Selection parameters of iron and manganese removal filter

Our company specializes in the production of stainless steel and carbon steel multi-media filters. The multi-media filters are supplied to major cities across the country such as Shanghai, Nanjing, Guangzhou, Shenzhen, Fuzhou, Xiamen, Chengdu, Chongqing, Lanzhou, Tianjin Nanchang, Wuhan, Changsha, Beijing, Zhengzhou, as well as Southwest, Northeast and North China regions, and have supporting services from freight logistics companies.

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