A water treatment device for enhanced manganese removal

Abstract

This utility model belongs to the field of wastewater treatment technology and discloses a water treatment device for enhanced manganese removal. The device includes a chlorination reaction tank and an activated carbon reaction tank. The chlorination reaction tank is connected to the activated carbon reaction tank via a connecting pipe. The bottom of the activated carbon reaction tank is connected to the bottom of the chlorination reaction tank via a return pipe equipped with a return pump and a third flow regulating valve. One side of the chlorination reaction tank is connected to a sodium hypochlorite solution dosing pipe and an inlet pipe equipped with a first flow regulating valve. The top of the activated carbon reaction tank is connected to an activated carbon powder suspension delivery pipe, and one side is connected to an outlet pipe equipped with a second flow regulating valve. This device significantly improves the manganese removal rate by coupling chlorination with activated carbon adsorption, combined with return circulation and flow control, reducing reagent waste and waste residue generation. It is stable in operation, convenient to operate, and suitable for treating high-concentration manganese-containing wastewater.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, and in particular relates to a water treatment device for enhanced manganese removal. Background Technology

[0002] Manganese is widely distributed in nature, with groundwater typically containing higher levels than surface water. Industrial activities such as steel and non-ferrous metal smelting also contribute to manganese pollution in water bodies. Excessive manganese ions in water not only affect its sensory properties, causing staining of clothing and the formation of "black water" from deposits on pipe walls, but also pose a potential threat to human health. Long-term ingestion can damage the nervous system, digestive system, and liver and kidney function, leading to dizziness, nausea, and abnormal liver and kidney function, among other problems. Currently, conventional manganese removal methods include oxidation, adsorption, ion exchange, and biological methods, but all have significant drawbacks: oxidation methods are prone to problems such as difficulty in controlling the dosage, demanding reaction conditions, and complex subsequent treatment; adsorption methods have limited adsorption capacity and are easily affected by interference; ion exchange methods require high energy consumption, generate large amounts of waste, and require advanced operational techniques; and biological methods have long treatment cycles and are susceptible to environmental factors, resulting in poor stability. The water treatment devices corresponding to these methods generally suffer from problems such as low manganese removal efficiency, high waste residue generation, serious reagent waste, high operating costs, weak adaptability, and poor operational stability, making it difficult to meet the treatment needs of high-concentration manganese-containing wastewater. Therefore, there is an urgent need to develop a water treatment device that has high manganese removal efficiency, stable operation, and is economical and environmentally friendly. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a water treatment device for enhanced manganese removal, which aims to overcome the problems of low manganese removal rate, large amount of waste residue, serious waste of reagents, high operating cost, weak adaptability and poor operating stability of existing water treatment devices when treating high-concentration manganese-containing wastewater.

[0004] To achieve the aforementioned objectives of this utility model, the technical solution adopted is as follows: A water treatment device for enhanced manganese removal includes a chlorination reaction tank and an activated carbon reaction tank. The chlorination reaction tank is connected to the activated carbon reaction tank via a connecting pipe. The bottom of the activated carbon reaction tank is connected to the bottom of the chlorination reaction tank via a return pipe. A return pump is installed on the return pipe. A sodium hypochlorite solution dosing pipe and a water inlet pipe are connected to one side of the chlorination reaction tank, respectively. An activated carbon powder suspension conveying pipe is connected to the top of the activated carbon reaction tank. A water outlet pipe is connected to one side of the activated carbon reaction tank. A first slag discharge pipe and a second slag discharge pipe are connected to the bottom of the chlorination reaction tank and the activated carbon reaction tank, respectively.

[0005] As a further improvement of this utility model, a first flow regulating valve is installed on the water inlet pipe, and a second flow regulating valve is installed on the water outlet pipe.

[0006] As a further improvement of this utility model, a first stirrer and a second stirrer are respectively installed inside the chlorination reaction tank and the activated carbon reaction tank.

[0007] As a further improvement of this utility model, the sodium hypochlorite solution dosing pipe is connected to the sodium hypochlorite solution dosing system, and the activated carbon powder suspension delivery pipe is connected to the activated carbon powder mixed suspension dosing system. Both the sodium hypochlorite solution dosing system and the activated carbon powder mixed suspension dosing system are adjustable dosing systems.

[0008] As a further improvement of this utility model, a third flow regulating valve is installed on the return pipe.

[0009] As a further improvement of this utility model, the bottom of both the chlorination reaction tank and the activated carbon reaction tank has an inverted conical structure.

[0010] The beneficial effects of this utility model are: 1. High manganese removal efficiency: Through the coupling effect of chlorination oxidation and activated carbon adsorption, combined with the reflux circulation design, manganese ion oxidation is more thorough and adsorption is more complete. Compared with existing devices, the manganese removal rate can be increased by 5-10%, which can effectively treat high-concentration manganese-containing wastewater.

[0011] 2. High reagent utilization rate: The reflux structure avoids the waste of unreacted activated carbon particles, and the adjustable dosing system can accurately control the dosage according to the manganese concentration of the influent, reducing the consumption of sodium hypochlorite and activated carbon, and reducing the amount of waste residue generated by 30% compared with traditional equipment.

[0012] 3. Stable and reliable operation: The agitator prevents stagnant water from forming in the tank, the flow regulating valve can accurately control the inlet, outlet and return flow rates, the inverted cone-shaped tank bottom facilitates sludge removal, the device is highly adaptable to the inlet water quality, and the outlet water quality is stable and meets the standards.

[0013] 4. Easy to operate and low cost: The device has a simple structure, requires no complicated operating technology, has low energy consumption, and the treated waste residue (including activated carbon and MnO2) can be recycled and reused, making it economical and environmentally friendly. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the second-view structure of the present invention; Figure 3This is a schematic diagram of the third-view structure of this utility model.

[0015] In the diagram: 1. Chlorination reaction tank; 2. Activated carbon reaction tank; 3. Sodium hypochlorite solution dosing pipe; 4. Connecting pipe; 5. Water outlet pipe; 6. Activated carbon powder suspension conveying pipe; 7. First slag discharge pipe; 8. Return pipe; 9. Second slag discharge pipe; 10. Water inlet pipe; 11. Return pump; 12. First agitator; 13. Second agitator; 14. First flow regulating valve; 15. Second flow regulating valve; 16. Sodium hypochlorite solution dosing system; 17. Activated carbon powder mixed suspension dosing system; 18. Third flow regulating valve. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0018] Contains high concentration of Mn 2+ Wastewater, prepared in the laboratory. Mn in the wastewater. 2+ The concentration of manganese in the water is ≤000 mg / L, and the pH is 6.5-8.5, requiring treatment. The enhanced manganese removal water treatment device provided by this invention is used for enhanced manganese removal.

[0019] like Figure 1-3 As shown, a water treatment device for enhanced manganese removal includes a chlorination reaction tank 1 and an activated carbon reaction tank 2. The chlorination reaction tank 1 is connected to the activated carbon reaction tank 2 via a connecting pipe 4. The bottom of the activated carbon reaction tank 2 is connected to the bottom of the chlorination reaction tank 1 via a return pipe 8. The solution flows back from the activated carbon reaction tank 2 to the chlorination reaction tank 1 through the return pipe 8 to ensure efficient and thorough manganese removal and prevent waste of reagents. A return pump 11 is installed on the return pipe 8 to provide power for the return solution and to prevent the solution from stagnating in the chlorination reaction tank 1 / activated carbon reaction tank 2 and forming stagnant water. A sodium hypochlorite solution dosing pipe 3 and an inlet pipe 10 are connected to one side of the chlorination reaction tank 1. An activated carbon powder suspension conveying pipe 6 is connected to the top of the activated carbon reaction tank 2. An outlet pipe 5 is connected to one side of the activated carbon reaction tank 2. A first slag discharge pipe 7 and a second slag discharge pipe 9 are connected to the bottom of the chlorination reaction tank 1 and the activated carbon reaction tank 2, respectively.

[0020] In chlorination reaction tank 1, water quality and quantity are regulated. Sodium hypochlorite solution is added to oxidize manganese ions into insoluble MnO2, which assists in the subsequent activated carbon reaction tank 2 in regulating water quality, quantity, and activated carbon adsorption, ensuring stable operation of the device. A first slag discharge pipe 7 is installed at the bottom of chlorination reaction tank 1 to facilitate the discharge of generated precipitates and prevent their accumulation in the tank, thus affecting the treatment effect. Activated carbon powder suspension is added to activated carbon reaction tank 2. The activated carbon adsorbs MnO2 generated in chlorination reaction tank 1, and then continues to adsorb manganese ions, promoting their precipitation. The bottom of activated carbon reaction tank 2 is equipped with a second slag discharge pipe 9, which is conducive to the discharge of the generated precipitate and prevents the precipitate from accumulating in the tank and thus affecting the treatment effect. A first flow regulating valve 14 is installed on the inlet pipe 10, and a second flow regulating valve 15 is installed on the outlet pipe 5.

[0021] The chlorination reaction tank 1 and the activated carbon reaction tank 2 are respectively equipped with a first stirrer 12 and a second stirrer 13, which can promote the reaction between the solution and water, ensure sufficient hydraulic retention time, and avoid the generation of stagnant water.

[0022] The sodium hypochlorite solution dosing pipe 3 is connected to the sodium hypochlorite solution dosing system 16, and the activated carbon powder suspension delivery pipe 6 is connected to the activated carbon powder mixed suspension dosing system 17. Both the sodium hypochlorite solution dosing system 16 and the activated carbon powder mixed suspension dosing system 17 are adjustable dosing systems.

[0023] A third flow regulating valve 18 is installed on the return pipe 8.

[0024] The bottoms of both the chlorination reaction tank 1 and the activated carbon reaction tank 2 are inverted conical structures.

[0025] The working process of this device is as follows: Manganese-containing wastewater enters the chlorination reaction tank 1 through the inlet pipe 10; sodium hypochlorite solution is added to the tank by the sodium hypochlorite solution dosing system 16 to generate free manganese chloride ions (Mn). 2+ The solution is oxidized to insoluble manganese dioxide (MnO2); after the first stirrer 12 promotes the reaction to proceed fully, the solution enters the activated carbon reaction tank 2 through the connecting pipe 4; the activated carbon powder mixed suspension system 17 adds activated carbon powder suspension to the tank, and the activated carbon adsorbs MnO2 and unreacted Mn. 2+ The second stirrer 13 enhances the adsorption effect; under the action of the reflux pump 11, the solution containing unreacted small-diameter activated carbon-MnO2 particles is refluxed back to the chlorination reaction tank 1 through the reflux pipe 8, and continues to be oxidized with free chlorine to generate MnO2. The fully reacted large-diameter activated carbon-MnO2 particles settle to the bottom of the inverted cone shape of the two tanks and are discharged through the first slag discharge pipe 7 and the second slag discharge pipe 9. The treated water, meeting the standards, is discharged through outlet pipe 5. The return inlet flow rates are Q1 and Q2, respectively, with Q1 and Q2 expressed in m... 3 The ratio of water flow rate to water volume is 9:1; the flow rate of water from outlet pipe 5 is synchronously adjusted according to the inlet flow rate to ensure a stable liquid level in the tank. After treatment by this device, the effluent Mn 2+ The concentration is ≤0.1mg / L, and the pH value is maintained at 6.5-8.5, which meets the Class I standard of the "Integrated Wastewater Discharge Standard" (GB8978-1996). The utilization rate of the reagent is increased by more than 30%, and the operating cost is reduced by 25-30% compared with the traditional device. The treated waste residue can be reused as an adsorbent material after drying.

[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, component disassembly or combination, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A water treatment device for enhanced manganese removal, characterized in that: The system includes a chlorination reaction tank and an activated carbon reaction tank. The chlorination reaction tank is connected to the activated carbon reaction tank via a connecting pipe. The bottom of the activated carbon reaction tank is connected to the bottom of the chlorination reaction tank via a return pipe. A return pump is installed on the return pipe. A sodium hypochlorite solution dosing pipe and a water inlet pipe are connected to one side of the chlorination reaction tank, respectively. An activated carbon powder suspension conveying pipe is connected to the top of the activated carbon reaction tank. A water outlet pipe is connected to one side of the activated carbon reaction tank. A first slag discharge pipe and a second slag discharge pipe are connected to the bottom of the chlorination reaction tank and the activated carbon reaction tank, respectively.

2. The enhanced manganese removal water treatment device according to claim 1, characterized in that: A first flow regulating valve is installed on the inlet pipe, and a second flow regulating valve is installed on the outlet pipe.

3. The enhanced manganese removal water treatment device according to claim 1, characterized in that: The chlorination reaction tank and the activated carbon reaction tank are respectively equipped with a first stirrer and a second stirrer.

4. The enhanced manganese removal water treatment device according to claim 1, characterized in that: The sodium hypochlorite solution dosing pipe is connected to the sodium hypochlorite solution dosing system, and the activated carbon powder suspension delivery pipe is connected to the activated carbon powder mixed suspension dosing system. Both the sodium hypochlorite solution dosing system and the activated carbon powder mixed suspension dosing system are adjustable dosing systems.

5. The enhanced manganese removal water treatment device according to claim 1, characterized in that: A third flow regulating valve is installed on the return pipe.

6. The enhanced manganese removal water treatment device according to claim 1, characterized in that: Both the chlorination reaction tank and the activated carbon reaction tank have an inverted conical bottom structure.

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