The process of removing iron and manganese filter, the principle of removing iron and manganese filt

The well water of the aeration device enters the aeration device after being pressurized by the self-priming pump, which mainly allows the well water to fully contact with the oxygen in the air; The process of rapid precipitation by oxidizing valence iron ions and low-valent manganese ions in water into **iron ions and **manganese ions by oxidation method. After the sedimentation tank, the well water after oxygen is aerated and reaches the sedimentation tank for sedimentation. (It mainly plays the role of buffering, so that the water has enough time to precipitate) The precipitated clean water enters the iron and manganese removal system after being pressurized by the booster pump, which mainly removes solid substances such as sediment, rust, manganese, bloodworms, algae, some metal substances, and various suspended solids in the water, and the normal conditions of the system are as follows

The operating pressure is 15m hr at an average filtration rate.

1.When the concentration of iron in groundwater is 5 10 mg l, the concentration of manganese is 1 2 mg l, or when the groundwater only contains iron but does not contain manganese, and the iron concentration is about 10 mg l, aeration single-stage iron and manganese removal filtration can be used. Process flow:

Groundwater, deep well pumps, aeration devices, water tanks, filter pumps, iron and manganese removal devices, reservoirs, water use units.

2.If the iron and manganese content in the groundwater is high, that is, when the iron is greater than 10mg l and the manganese is greater than 2mg l, it is advisable to use aeration two-stage iron and manganese removal filtration.

Process flow: groundwater, deep well pump, aeration device, water tank, filter pump, primary iron and manganese removal device, secondary iron and manganese removal device, reservoir, water unit.

Depending on the iron and manganese content in the raw water, the process of iron and manganese removal will also be different

Single-stage iron and manganese filtration equipment (iron 10mg l, manganese <>

Two-stage iron and manganese removal filtration equipment (10mg l iron 20mg l, manganese <>

Iron and manganese removal equipment process.

High concentration iron and manganese removal filtration equipment.

Iron and manganese removal equipment process.

The iron-manganese oxidation reaction formula is as follows: Iron oxidation: air:

4Fe2++3O2+6H2O=4Fe(OH)3 Manganese sand Mnomn2O7+4Fe2++2O2+6H 2O=3mNO2 +4Fe(OH)3 ; Manganese oxidation: Mn2++O2=mno2, manganese sand Mn2++mno2·H2O= mno2·mno2O2+2H+

1. Overview of automatic iron and manganese removal filter.

Many towns and industrial and mining enterprises in China rely on groundwater as their water source. However, in many areas, groundwater contains excessive iron, and its content is generally in the range of 2-16mq l. "Automatic iron and manganese filter" overcomes various problems caused by human operation, backwashing, etc., and better plays the characteristics of fully automatic work, so it has the incomparable superiority of other iron removal devices, and the iron content of the treated groundwater meets the national GB5749-85 drinking water quality standard.

In addition to iron and manganese in water, it must be aerated to oxidize divalent iron and divalent manganese with oxygen in the air to generate Fe(OH)3, Mno2. The use of one or more stages of manganese sand filter filtration, can meet the treatment requirements, the effluent iron content, manganese content, in line with the national drinking water standards.

2. Design parameters of urban automatic iron-manganese removal filter.

1. Applicable inlet water iron content: 8mg l, >8mg l 16mg l

2. Iron content of effluent: in line with the national GB5749-85 drinking water quality standard.

3. Surface load: 8-9m3 h·m2

4. Flushing intensity: 14-16L s·m2

5. Flushing duration: 4-6mim (adjustable).

6. Inlet water pressure:

7. Filter material: fine manganese sand particle size for iron and manganese removal.

8. Working temperature: 5 40 (special temperature can be customized).

3. The unique advantages of urban automatic iron and manganese removal filter.

1. The automatic iron and manganese removal filter is fully automatic. From the water inlet, oxygen, water distribution, filtration, backwashing, and effluent processes, it is combined into an integrated new iron removal device. All of them can be automatically adjusted according to the operating requirements.

2. There is no need to be equipped with suction device, air compressor, backwash pump or water tower. It not only saves the project investment, but also brings a lot of convenience to the project operation management, maintenance and other work.

3. The special manganese sand filter material with high iron removal efficiency is used, which can ensure the requirements of water quality and quantity after use.

4. If the high and low water level electrical control system is set up in the clear water pool and connected to the opening and closing system of the deep well water pump, then the complete system can meet the requirements of the unmanned automatic water purification treatment system.

Fourth, the scope of application of automatic iron and manganese removal filter.

The iron and manganese removal filters are divided into two series: one is suitable for the iron removal treatment system with an iron content of 8 mg l in groundwater. The other is suitable for the iron removal treatment system of groundwater iron content 》8mg l- 16mg l.

The two kinds of iron and manganese removal filters are suitable for small and medium-sized towns, rural water supply, industrial and mining enterprises, industrial water, softening, desalination process and other treatment systems that use groundwater as the water supply source.

First of all, please choose pure natural manganese sand filter material, which is the key and the first step, Shandong Linyi Xinxin manganese sand plant.

1 Treatment Effect:

Iron content: ;

Manganese content: ;

Effluent turbidity: <3 ftu.

2 Water Inlet Requirements:

Iron content: 20mg l;

Manganese content: 3mg l;

Inlet turbidity: <20ftu;

Alkalinity: 2mg l;

pH: >when iron is removed), >when manganese is removed).

3 Working environment parameters.

Working temperature: 5-60 (special temperature can be customized);

Working Pressure: .

4 Running parameters.

Working mode: pressure type;

Mode of operation: water flow from top to bottom, in series (high iron and manganese content) or in parallel;

Filtration speed: 6-10m h (when removing iron), 5-8m h (when removing manganese);

Operation cycle: depending on the quality of raw water, the minimum is not less than 8 hours;

Backwashing method: water washing, or gas-water combined backwashing;

Water consumption for backwashing: 1-3%;

Lectotype. <>

Inlet water sources: groundwater, well water.

Effluent water quality: domestic water, no color, peculiar smell, to meet the domestic water standard.

System configuration: well water self-priming pump, aeration device, sedimentation tank, raw water booster pump, iron and manganese remover, activated carbon filter, water purification tank.

System water yield: 95%.

The iron and manganese removal filter is mainly suitable for the pretreatment of iron and manganese removal of groundwater in high-iron and high-manganese areas, and industrial softened water and desalination equipment. The equipment adopts the principle of aeration oxidation, manganese sand catalysis, adsorption and filtration of iron and manganese removal, and uses the aeration device to dissolve the oxygen in the air in the water, and then oxidizes the Fe2+ and Mn 2+ in the water into Fe3+ and Mno2 insoluble in water, and then removes the iron and manganese ions in the water in combination with the catalysis, adsorption and filtration of natural manganese sand.

Iron (manganese) containing groundwater by flushing or adding oxidant, iron (manganese) ions in the water begin to oxidize, when the water flows through the manganese sand filter layer, contact oxidation reaction occurs in the filter layer and the biochemical action and physical interception adsorption on the surface of the filter material, so that the iron (manganese) ions in the water are precipitated and removed. Especially in the process of treating micro-polluted manganese-containing groundwater, iron bacteria can not only effectively remove iron and manganese, but also use ammonia in water as a nutrient source for metabolism, and achieve the effect of ammonia nitrogen removal with the participation of other bacteria.

The interception and filtration of multi-media filter material is used to remove impurity particles, colloids and suspended solids with large particle size, which has the characteristics of low cost, convenient operation and maintenance and management. Quartz sand, anthracite filter material, manganese sand, AFM, activated carbon, etc., high filtration rate, large sewage interception capacity, long filtration cycle, the tank body has FRP, carbon steel, stainless steel and other materials, can be equipped with multi-way valves or electric, pneumatic, hydraulic valves with PLC control, respectively suitable for small and medium flow and large flow conditions, can achieve automatic and manual dual control. The highest filtration accuracy is up to 5 microns.

Dissolved iron and manganese in groundwater generally exist in the form of low-valent Fe2+ and Mn2+, and its hypothetical compound form is bicarbonate, to remove iron and manganese in groundwater, it is necessary to oxidize divalent iron to ferric iron and low-valent manganese to ** manganese, under the condition of pH value, ** iron and manganese compounds are gel condensed and settled, which can be removed by filtration. Oxidation separation technology is used to remove iron and manganese harmful substances in water, that is, enough O2 or O3 is filled into groundwater, and the low-valent iron and manganese in the water are oxidized into chemical precipitates of iron and manganese under the action of the unique catalytic membrane distributed on the filter layer of the manganese sand filter (Mno2 and -FeO(OH) precipitation formed by manganese and iron in the water). This ** sediment is trapped in the filter layer, and the iron and manganese content of the effluent meets the standard requirements.

Catalytic membranes play an important role in iron and manganese in water: aCatalytic action to accelerate the conversion of ferric iron into ferric iron in water.

b.Interception and separation, separating iron and manganese from water. c.

Biochemical action The presence of iron bacteria in the catalytic membrane removes iron and manganese ions from water through their metabolism. Sufficient dissolved oxygen must be maintained in the water during the oxidation of ferric iron to ferric, in which part of the hydrogen sulfide is oxidized and blown off, and the remaining part and the tiny suspended solids in the water are adsorbed by the activated carbon adsorber.