Mine acid wastewater treatment equipment

Abstract

The utility model provides mine acid wastewater treatment equipment which comprises a wastewater treatment equipment body, the wastewater treatment equipment body comprises an aeration oxidation pond, an alkaline slow-release reaction pond, a catalytic reaction pond and an adsorption reaction pond, the aeration oxidation pond and the alkaline slow-release reaction pond are arranged on one side of an adjusting pond, and the catalytic reaction pond is arranged on the other side of the adjusting pond. A catalytic reaction tank is arranged on the side edges of the aeration oxidation tank and the alkaline slow-release reaction tank, the other side of the catalytic reaction tank is connected with an adsorption reaction tank, an equipment control area and a sludge treatment area are arranged on the other side of the adjusting tank, and perforated plates are inserted into the catalytic reaction tank and the adsorption reaction tank. The mine acid wastewater treatment equipment is small in occupied area, simple in treatment process, small in generated sludge amount, free of additional treatment agents, simple and convenient in daily operation and lower in operation cost compared with the prior art. And the problem of secondary pollution can be avoided, the equipment stability is high, and the failure rate can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a device for treating acidic mine wastewater. Background Technique

[0002] Acid mine drainage (AMD) is highly acidic and rich in heavy metal ions and sulfates. Acidic wastewater has become the most significant and serious environmental pollution problem currently visible, causing acidification and yellowing of the riverbed of downstream rivers, endangering aquatic organisms, ecological environment and landscape, and posing a certain threat to the safety of domestic drinking water and soil food security.

[0003] The existing AMD treatment technologies mainly have two treatment ideas: source control and end treatment. Source control reduces the contact between minerals and water and air through methods such as curtain grouting and in-situ injection, or inhibits the activities of microorganisms, thereby reducing the formation of AMD. Source control technologies mainly include covering method, neutralization method, surface passivation method, etc. End treatment technology refers to treating AMD after it is formed before it is discharged into the environment to reduce the harm caused by AMD to the environment. The technologies used in end treatment mainly include ion exchange, membrane separation, adsorption, neutralization precipitation, microbial method, constructed wetland method, etc. At present, end treatment technology is widely used in the field of AMD treatment. However, there are also the following problems in the actual operation process: 1. The dosage of chemicals is large and the operation cost is high; 2. The process technical route is long, the on-site implementation process is relatively complex, and the failure rate of facilities and equipment is high; 3. The problem of secondary pollution is generated. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a device for treating acidic mine wastewater, so as to solve the problems put forward in the above background technology. The utility model has a small floor area, a simple treatment process, a small amount of sludge generated, does not require additional treatment chemicals, and has a lower operation cost than the existing technology.

[0005] In order to achieve the above purpose, the utility model is realized by the following technical solutions: A device for treating acidic mine wastewater includes a wastewater treatment device body. The wastewater treatment device body includes an aeration oxidation tank, an alkaline slow-release reaction tank, a catalytic reaction tank and an adsorption reaction tank. An aeration oxidation tank and an alkaline slow-release reaction tank are arranged on one side of the regulation tank. A catalytic reaction tank is arranged on the side of the aeration oxidation tank and the alkaline slow-release reaction tank. The other side of the catalytic reaction tank is connected to an adsorption reaction tank. An equipment control area and a sludge treatment area are arranged on the other side of the regulation tank. Porous plates are inserted into the catalytic reaction tank and the adsorption reaction tank.

[0006] Further, a plurality of round holes are formed in the bottom of the porous plate, and the side of the porous plate is fixedly connected to the inner wall of the catalytic reaction tank or the adsorption reaction tank.

[0007] Further, an aeration device is installed inside the aeration oxidation tank, a lift pump is installed on the top of the regulation tank, and the side of the lift pump is connected to the inside of the aeration oxidation tank through a water inlet pipe.

[0008] Further, the regulation tank has a size of 1m * 2m * 1.85m, and the designed retention time of the regulation tank is 7.4h.

[0009] Further, the aeration device in the aeration oxidation tank includes an aeration pump and an aeration pipe, and the aeration pipe is integrally embedded in the inside of the aeration oxidation tank. The size of the aeration oxidation tank is 0.7m * 1m * 1.85m, and the designed retention time of the aeration oxidation tank is 2.6h.

[0010] Further, the inside of the alkaline slow-release reaction tank is filled with an alkaline slow-release material, the alkaline slow-release material is composed of a natural alkaline material and a gelling material, the size of the alkaline slow-release reaction tank is 0.7m * 1m * 1.80m, and the designed retention time of the alkaline slow-release reaction tank is 2.52h.

[0011] Further, the inside of the catalytic reaction tank is filled with packing, and an iron active filter membrane is arranged on the surface of the packing. The size of the catalytic reaction tank is 2m * 1.5m * 1.75m, and the designed retention time of the catalytic reaction tank is 10.5h.

[0012] Further, the adsorption reaction tank has a size of 2m * 1.5m * 1.70m, and the designed retention time of the adsorption reaction tank is 10.2h.

[0013] Advantages of the present utility model:

[0014] 1. The acid mine wastewater treatment equipment has a small floor area, a simple treatment process, a small amount of sludge generated, does not require additional treatment agents, is simple and convenient for daily operation, and has a lower operation cost compared with the prior art.

[0015] 2. After the acid mine wastewater treatment equipment treats the acid mine wastewater, it can meet the Class IV water standard of the "Surface Water Environment Quality Standard" (GB3838-2002), and can avoid the problem of secondary pollution. The equipment has high stability and can reduce the failure rate. Description of the Drawings

[0016] Figure 1 It is a floor plan of an acid mine wastewater treatment equipment of the present utility model;

[0017] Figure 2This is the external structure diagram of the waste water treatment equipment of the present utility model;

[0018] Figure 3 This is the structure diagram of the perforated plate of the present utility model;

[0019] In the figure: 1, regulating tank; 2, aeration oxidation tank; 3, alkaline slow-release reaction tank; 4, catalytic reaction tank; 5, adsorption reaction tank; 6, equipment control area; 7, sludge treatment area; 8, aeration pipe; 9, perforated plate; 10, round hole. Specific embodiments

[0020] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] Please refer to Figures 1 to 3 , the present utility model provides the following technical solutions: A mine acid waste water treatment equipment, including a waste water treatment equipment body, the waste water treatment equipment body includes an aeration oxidation tank 2, an alkaline slow-release reaction tank 3, a catalytic reaction tank 4 and an adsorption reaction tank 5, one side of the regulating tank 1 is provided with an aeration oxidation tank 2 and an alkaline slow-release reaction tank 3, the side of the aeration oxidation tank 2 and the alkaline slow-release reaction tank 3 is provided with a catalytic reaction tank 4, the other side of the catalytic reaction tank 4 is connected with an adsorption reaction tank 5, the other side of the regulating tank 1 is provided with an equipment control area 6 and a sludge treatment area 7, and perforated plates 9 are inserted inside both the catalytic reaction tank 4 and the adsorption reaction tank 5.

[0022] This mine acid waste water treatment equipment has a small floor area, a simple treatment process, a small amount of sludge generated, does not require additional treatment agents, is simple and convenient for daily operation, and has a lower operation cost than the prior art. After treating the mine acid waste water, it can meet the Class IV water standard of the "Surface Water Environment Quality Standard" (GB3838 - 2002), and can avoid the problem of secondary pollution, with high equipment stability and reduced failure rate.

[0023] In this embodiment, a plurality of round holes 10 are opened at the bottom of the perforated plate 9, and the side of the perforated plate 9 is fixedly connected to the inner wall of the catalytic reaction tank 4 or the adsorption reaction tank 5. An aeration device is installed inside the aeration oxidation tank 2, a lift pump is installed on the top of the regulating tank 1, and the side of the lift pump is connected to the inside of the aeration oxidation tank 2 through a water inlet pipe.

[0024] In this embodiment, the designed influent flow rate is 12m 3 / d. The volume and residence time of each reaction tank are as follows:

[0025] Regulating Pond 1: Considering the large fluctuations in water volume and quality during actual production, Regulating Pond 1 is designed. The core function of Regulating Pond 1 is to balance water quality and volume to adapt to the constant treatment capacity of the sewage treatment system. The size of Regulating Pond 1 is 1m * 2m * 1.85m, and the designed retention time is 7.4h.

[0026] Aeration Oxidation Reaction Pond: An aeration device is installed in the aeration pond. The aeration device consists of an aeration pump and an aeration pipe 8. This reaction pond can increase the dissolved oxygen content in the wastewater and oxidize ferrous iron to ferric iron, facilitating subsequent catalytic reactions. The size of the Aeration Oxidation Reaction Pond is 0.7m * 1m * 1.85m, and the designed retention time is 2.6h.

[0027] Alkaline Slow Release Reaction Pond 3: The Alkaline Slow Release Reaction Pond 3 is filled with alkaline slow release materials. The alkaline slow release materials are mainly made of natural alkaline materials (such as calcite, limestone, etc.) and cementitious materials, mainly used for neutralization reactions to increase the pH of the wastewater. The size of the Alkaline Slow Release Material Reaction Pond is 0.7m * 1m * 1.80m, and the designed retention time is 2.52h

[0028] Catalytic Reaction Pond 4: The iron-containing acidic wastewater from the mine enters the permeable reaction unit, and a ferrous active filter membrane is formed on the surface of the filler through principles such as neutralization, precipitation, adsorption, and oxidation

[0029] [Fe(OH)3·2H2O], the ferrous active filter membrane first adsorbs Fe in the water in the form of ion exchange 2+ , when there is dissolved oxygen in the water, the adsorbed Fe 2+ rapidly reacts under the catalytic action of the ferrous active filter membrane, and the reaction products also participate in the catalytic reaction, and iron is continuously removed. The filler of Catalytic Reaction Pond 4 is manganese sand loaded filler, and the filler is supported by manganese sand and cementitious materials. The size of Catalytic Reaction Pond 4 is 2m * 1.5m * 1.75m, and the designed retention time is 10.5h. The reaction principle of Catalytic Reaction Pond 4 is as follows:

[0030] Fe(OH)3·2H2O + Fe 2+ →[Fe(OH)2(OFe)·2H2O] + +H +

[0031] [Fe(OH)2(OFe)·2H2O + +1 / 4O2 + 9 / 2H2O → Fe(OH)3·2H2O + H +

[0032] Adsorption Reaction Pond 5: Adsorption Reaction Pond 5 mainly plays an adsorption role on the impurities in the wastewater, further removing the precipitates and some metal ions in the water. The size of Adsorption Reaction Pond 5 is 2m * 1.5m * 1.70m, and the designed retention time is 10.2h.

[0033] The above has shown and described the basic principles, main features and advantages of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic features of the present utility model, the present utility model can be implemented in other specific forms.

[0034] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An acid mine wastewater treatment device, comprising a wastewater treatment device body, characterized in that: The main body of the wastewater treatment equipment includes an adjustment tank (1), an aeration oxidation tank (2), an alkaline slow-release reaction tank (3), a catalytic reaction tank (4), and an adsorption reaction tank (5). An aeration oxidation tank (2) and an alkaline slow-release reaction tank (3) are arranged on one side of the adjustment tank (1). A catalytic reaction tank (4) is arranged on the side of the aeration oxidation tank (2) and the alkaline slow-release reaction tank (3). An adsorption reaction tank (5) is connected to the other side of the catalytic reaction tank (4). An equipment control area (6) and a sludge treatment area (7) are arranged on the other side of the adjustment tank (1). Porous plates (9) are inserted into the interiors of the catalytic reaction tank (4) and the adsorption reaction tank (5).

2. The acid mine wastewater treatment equipment according to claim 1, characterized in that: A plurality of round holes (10) are formed at the bottom of the porous plate (9), and the side of the porous plate (9) is fixedly connected to the inner wall of the catalytic reaction tank (4) or the adsorption reaction tank (5).

3. An acid mine wastewater treatment device according to claim 1, characterized in that: An aeration device is installed inside the aeration oxidation tank (2). A lifting pump is installed at the top of the adjustment tank (1), and the side of the lifting pump is communicated with the inside of the aeration oxidation tank (2) through a water inlet pipe.

4. A mine acid wastewater treatment device according to claim 1, characterized in that: The size of the adjustment tank (1) is 1m * 2m * 1.85m, and the designed retention time of the adjustment tank (1) is 7.4h.

5. The acid mine wastewater treatment equipment according to claim 3, wherein: The aeration device in the aeration oxidation tank (2) includes an aeration pump and an aeration pipe (8), and the aeration pipe (8) is integrally embedded into the inside of the aeration oxidation tank (2). The size of the aeration oxidation tank (2) is 0.7m * 1m * 1.85m, and the designed retention time of the aeration oxidation tank (2) is 2.6h.

6. The acid mine wastewater treatment equipment according to claim 1, characterized in that: The inside of the alkaline slow-release reaction tank (3) is filled with an alkaline slow-release material, and the alkaline slow-release material is composed of a natural alkaline material and a gelling material. The size of the alkaline slow-release reaction tank (3) is 0.7m * 1m * 1.80m, and the designed retention time of the alkaline slow-release reaction tank (3) is 2.52h.

7. An acid mine wastewater treatment device according to claim 1, characterized in that: The inside of the catalytic reaction tank (4) is filled with a filler, and an iron active filter membrane is arranged on the surface of the filler. The size of the catalytic reaction tank (4) is 2m * 1.5m * 1.75m, and the designed retention time of the catalytic reaction tank (4) is 10.5h.

8. The acid mine wastewater treatment equipment according to claim 1, characterized in that: The size of the adsorption reaction tank (5) is 2m * 1.5m * 1.70m, and the designed retention time of the adsorption reaction tank (5) is 10.2h.

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