Manganese sand filter

Abstract

A manganese sand filter comprises a tank body, an end cover, supporting legs and an outer matching pipe, a manhole, a discharging hole and a sight glass are arranged on the outer side of the tank body, a lifting lug and a water inlet are arranged on the end cover, a water outlet hole is formed in the lower portion of the tank body, and the tank body is filled with filter materials. The filter material is filled with one or more of manganese sand, quartz sand, anthracite, activated carbon and porous ceramic in a layered manner, and the outer piping is composed of a water inlet pipe, a water production pipe, a water drainage pipe, an upper connecting pipe and a lower connecting pipe. The water purifier is simple in structure and convenient to install, the filter material has strong self-adaptability, backwashing disturbance is not disordered, the water purifier not only has good removal performance on iron and manganese, but also can effectively remove pollutants such as suspended solids, colloids, pigments and organic matters in water, and the water quality can be obviously improved.

Description

Technical Field

[0001] The utility model relates to a filtering device, in particular to a manganese sand filter, belonging to the technical field of water treatment. Background Art

[0002] The manganese sand filter, also known as the iron and manganese removal filter, is mainly used to remove iron and manganese ions in water. Iron and manganese almost exist simultaneously in groundwater. Especially in the northern regions of China and areas rich in iron ore and manganese ore, when the iron content in water is high, the water has an iron smell, and long-term drinking will seriously affect physical health. When used for production water such as papermaking, textile, printing and dyeing, and leather refining, it will seriously affect product quality. Therefore, in the water treatment process with excessive iron and manganese, the manganese sand filter has become an essential equipment.

[0003] During the treatment process, a layer of active filter membrane containing iron and manganese is naturally formed on the manganese sand. Under the catalytic action of this active filter membrane, divalent iron and divalent manganese in the dissolved state in water are oxidized into insoluble iron hydroxide and manganese oxide, and then the iron and manganese are intercepted by using the adsorption and filtration performance of the manganese sand filter. The manganese sand filter is generally used in cooperation with other water treatment equipment and is widely used in various water treatment projects such as drinking water purification, production process water purification, and sewage treatment. It has the advantages of small filtration resistance, fast filtration speed, large specific surface area, large dirt-holding capacity, and good anti-pollution performance. However, the existing manganese sand filters have single functions, mostly only used for iron and manganese removal, and are prone to layer disorder during backwashing, and the backwashing effect needs to be improved. Summary of the Invention

[0004] In view of the defects existing in the prior art, the purpose of the utility model is to provide a manganese sand filter with simple structure, good self-adaptability, high pollutant removal rate, and high water outlet quality.

[0005] The utility model adopts the following technical scheme: a manganese sand filter, comprising a tank body, an end cover, support feet, and an external pipe. A manhole, a discharge hole, and a sight glass are arranged on the outer side of the tank body. A lifting lug and a water inlet are arranged on the end cover. A water outlet hole is arranged below the tank body. Filter media are filled in the tank body. The external pipe is composed of a water inlet pipe, a product water pipe, a drain pipe, an upper connecting pipe, and a lower connecting pipe. An inlet valve, an inlet pressure gauge, and a backwashing inlet valve are arranged on the water inlet pipe. A product water valve and a product water pressure gauge are arranged on the product water pipe. A backwashing sewage discharge valve and a normal washing sewage discharge valve are arranged on the drain pipe.

[0006] Furthermore, the tank body and the end cover are made of carbon steel or 304 stainless steel, and the inner wall is coated with epoxy resin or lined with natural rubber for corrosion protection.

[0007] Further, the filter media is composed of one or more of manganese sand, quartz sand, anthracite, activated carbon, and porous ceramics, which are loaded in layers. The loading method is as follows: quartz sand and porous ceramics with a larger specific gravity and larger particle size are loaded in the lower layer, manganese sand with a larger specific gravity and smaller particle size is loaded in the middle layer, and anthracite and activated carbon with a smaller specific gravity and larger particle size are loaded in the upper layer.

[0008] Further, the upper connecting pipe is connected to the water inlet through a flange. An exhaust pipe is also provided on the water inlet, and an exhaust valve is provided on the exhaust pipe.

[0009] Further, a differential pressure controller is provided between the inlet water pressure gauge and the product water pressure gauge. When the differential pressure exceeds the set value, the manganese sand filter automatically starts the backwashing and normal washing procedures.

[0010] The beneficial effects of the present utility model are as follows: (1) The structure of the present utility model is simple, the installation is convenient, the cost is low, it can realize the synchronous removal of various pollutants, and the operation cost is low.

[0011] (2) Through the optimized design of the types of filter media loaded, the present utility model not only has good removal performance for iron and manganese, but also can effectively remove pollutants such as suspended solids, colloids, pigments, and organic matter in water.

[0012] (3) Through the grading design of the filter media, the self-adaptive operation of the filter is realized. The filter media has strong self-adaptability to the raw water concentration, operating conditions, etc. That is, during filtration, the filter bed automatically forms a state of being loose on the upper layer and dense on the lower layer, which is beneficial to ensuring the water quality of the effluent under various operating conditions and will not cause the phenomenon of layer disorder after backwashing disturbance.

[0013] (4) The present utility model can realize the automatic operation of filtration and flushing, the operation is simple, the filter media replacement period is long, and the workload of on-site maintenance personnel can be greatly reduced. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the present utility model.

[0015] In the figure: 1. Discharge hole, 2. Tank body, 3. Manhole, 4. End cover, 5. Exhaust valve, 6. Exhaust pipe, 7. Water inlet, 8. Upper connecting pipe, 9. Lifting lug, 10. Sight glass, 11. Inlet pipe, 12. Product water pipe, 13. Support foot, 14. Water outlet hole, 15. Inlet valve, 16. Inlet water pressure gauge, 17. Backwashing sewage discharge valve, 18. Backwashing inlet valve, 19. Differential pressure controller, 20. Normal washing sewage discharge valve, 21. Product water valve, 22. Product water pressure gauge, 23. Lower connecting pipe, 24. Drain pipe. Detailed Embodiments

[0016] The following further describes the present utility model in conjunction with the accompanying drawings.

[0017] As Figure 1 shown, a manganese sand filter includes a tank body 2, end covers 4, support feet 13, and external pipes. A manhole 3, a discharge hole 1, and a sight glass 10 are provided on the outer side of the tank body 2. A lifting lug 9 and a water inlet 7 are provided on the end cover 4. A water outlet hole 14 is provided below the tank body 2. The tank body 2 is filled with filter media. The external pipes are composed of a water inlet pipe 11, a product water pipe 12, a drain pipe 24, an upper connecting pipe 8, and a lower connecting pipe 23. An inlet valve 15, an inlet pressure gauge 16, and a backwash inlet valve 18 are provided on the water inlet pipe 11. A product water valve 21 and a product water pressure gauge 22 are provided on the product water pipe 12. A backwash drain valve 17 and a normal wash drain valve 20 are provided on the drain pipe 24.

[0018] Furthermore, the tank body 2 and the end covers 4 are made of carbon steel or 304 stainless steel, and the inner wall is coated with epoxy resin or lined with natural rubber for corrosion prevention.

[0019] Furthermore, the filter media is composed of manganese sand, quartz sand, and activated carbon filled in three layers. Among them, the quartz sand with a larger specific gravity and larger particle size is filled in the lower layer, the manganese sand with a larger specific gravity and smaller particle size is filled in the middle layer, and the activated carbon with a smaller specific gravity and larger particle size is filled in the upper layer.

[0020] Furthermore, the upper connecting pipe 8 is connected to the water inlet 7 through a flange. An exhaust pipe 6 is also provided on the water inlet 7, and an exhaust valve 5 is provided on the exhaust pipe 6.

[0021] Furthermore, a differential pressure controller 19 is provided between the inlet pressure gauge 16 and the product water pressure gauge 22. When the differential pressure exceeds the set value, the manganese sand filter automatically starts the backwash and normal wash procedures.

[0022] The working mode of the utility model is as follows: When it is first run, exhaust gas needs to be discharged first. Open the exhaust valve 5 and the water inlet valve 15, start the water inlet pump to let water in until there is no air in the water discharged from the exhaust pipe 6, and then conduct about 5 minutes of normal washing on the filter media. During normal washing, open the water inlet valve 15 and the normal washing sewage discharge valve 20. When water comes out from the normal washing sewage discharge valve 20, adjust the water inlet flow rate to the rated value. When the water outlet is clear, open the water production valve 21 and close the normal washing sewage discharge valve 20. The manganese sand filter enters the filtering process. The raw water after aeration enters the manganese sand filter through the water inlet pipe 11. After being filtered by the filter media, it sends water to the subsequent equipment. As the running time of the manganese sand filter extends, the water pressure of its water outlet increases. When the pressure difference between the water production pressure gauge 22 and the water inlet pressure gauge 16 increases by 0.05 - 0.07 MPa, under the control of the pressure difference controller 19, the manganese sand filter automatically enters the backwashing process. During backwashing, the water inlet valve 15 and the water production valve 21 are closed, the backwashing water inlet valve 18 and the backwashing sewage discharge valve 17 are opened, and the water after backwashing is discharged through the drain pipe 24. The backwashing time is 10 - 30 minutes. After the backwashing ends, normal washing is carried out. During normal washing, the backwashing water inlet valve 18 and the backwashing sewage discharge valve 17 are closed, the water inlet valve 15 and the normal washing sewage discharge valve 20 are opened, and the water after normal washing is discharged through the drain pipe 24. The normal washing time is about 5 - 15 minutes. When the water outlet is clear, the normal washing ends. Then, the normal washing sewage discharge valve 20 is closed, the water production valve 21 is opened, and the manganese sand filter enters the normal operation state.

[0023] In this embodiment, three layers of filter media are filled in the manganese sand filter. The activated carbon in the upper part can effectively remove pollutants such as peculiar smell, colloid, organic matter, turbidity, pigment, and residual chlorine in the water, significantly improving the water quality. The manganese sand in the middle part has dual functions of catalysis and filtration. The active filter membrane attached with iron and manganese on the manganese sand can oxidize the iron and manganese ions in the water into insoluble iron hydroxide and manganese oxide, which are then intercepted and removed by the manganese sand and the quartz sand in the lower part. At the same time, the quartz sand in the lower part can not only further remove impurities such as suspended solids, particulate matters, and sediment in the water, but also provide a larger space for the attachment and reproduction of bacteria in the active filter membrane on the manganese sand.

[0024] The above embodiments have elaborated on the technical solutions of the utility model in detail, but they do not limit the protection scope of the utility model. Those of ordinary skill in the art can still make improvements and modifications on this basis, but these improvements and modifications are within the protection scope of the claims of the utility model.

Claims

1. A manganese sand filter, comprising a tank body, an end cover, support feet, and external pipes. A manhole, a discharging hole, and a sight glass are arranged on the outer side of the tank body. Lifting lugs and a water inlet are arranged on the end cover. A water outlet is arranged below the tank body. Filter media are filled in the tank body. The external pipes are composed of a water inlet pipe, a product water pipe, a drain pipe, an upper connecting pipe, and a lower connecting pipe. An inlet valve, an inlet pressure gauge, and a backwashing inlet valve are arranged on the water inlet pipe. A product water valve and a product water pressure gauge are arranged on the product water pipe. A backwashing sewage discharge valve and a normal washing sewage discharge valve are arranged on the drain pipe.

2. The manganese sand filter according to claim 1, characterized in that: The tank body and the end cover are made of carbon steel or 304 stainless steel, and the inner wall is coated with epoxy resin or lined with natural rubber for corrosion prevention.

3. A manganese sand filter according to claim 1, characterized in that: The upper connecting pipe is connected to the water inlet through a flange. An exhaust pipe is further arranged on the water inlet, and an exhaust valve is arranged on the exhaust pipe.

4. A manganese sand filter according to claim 1, characterized in that: A differential pressure controller is arranged between the inlet pressure gauge and the product water pressure gauge. When the differential pressure exceeds the set value, the manganese sand filter automatically starts the backwashing and normal washing procedures.

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