A metallurgical high-salt wastewater treatment device

Abstract

This utility model discloses a metallurgical high-salt wastewater treatment device, relating to the field of industrial wastewater treatment technology. It includes an equalization tank, the outlet of which is connected to the inlet of an ozone water purifier. The outlet of the ozone water purifier is connected to the inlet of an electrocoagulation device, the outlet of the electrocoagulation device is connected to the inlet of an electroadsorption device, the outlet of the electroadsorption device is connected to the inlet of an ultrafiltration device, and the outlet of the ultrafiltration device is connected to a first pressurization component. In this utility model, the electrocoagulation and electroadsorption technologies used in the treatment process fully utilize the high salt content of metallurgical concentrated brine. The process has low energy consumption, low cost, and stable treatment effect. The recycled water quality meets the requirements for industrial fresh water, not only reducing the generation of concentrated brine but also greatly improving the reuse rate of production wastewater and reducing the cost of purchasing fresh water for enterprises. This has significant practical implications for the sustainable development of enterprises.

Description

Technical Field

[0001] This utility model relates to the field of industrial wastewater treatment technology, and in particular to a metallurgical high-salt wastewater treatment device. Background Technology

[0002] High-salinity industrial wastewater generated during steel production has a complex composition. This wastewater accelerates scaling and corrosion in process pipelines, and direct discharge can cause serious damage to the ecological environment, such as soil salinization, seriously threatening human production safety. With the rapid development of my country's steel industry, the continuous expansion of industrial capacity, and the increasing calls for zero discharge of industrial wastewater, although the water consumption per ton of steel is constantly decreasing due to process improvements and product optimization, the amount of this high-concentration saline wastewater is also increasing. The issue of achieving compliant discharge is receiving increasing attention from environmental protection departments and enterprises, and is a crucial step in achieving zero discharge of wastewater. This is a common problem currently faced by all steel enterprises. Therefore, this paper presents a metallurgical high-salinity wastewater treatment device. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a metallurgical high-salt wastewater treatment device. The electrocoagulation and electroadsorption technologies used in the treatment process fully utilize the high salt content of metallurgical concentrated brine. The process has low energy consumption, low cost, and stable treatment effect. The quality of the recycled water meets the requirements of industrial fresh water. This not only reduces the amount of concentrated brine generated but also greatly improves the reuse rate of production wastewater, reducing the cost of purchasing fresh water for enterprises. It has important practical significance for the sustainable development of enterprises and overcomes the shortcomings of existing technologies.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A metallurgical high-salt wastewater treatment device includes an equalization tank. The outlet of the equalization tank is connected to the inlet of an ozone water purifier. The outlet of the ozone water purifier is connected to the inlet of an electrocoagulation device. The outlet of the electrocoagulation device is connected to the inlet of an electroadsorption device. The outlet of the electroadsorption device is connected to the inlet of an ultrafiltration device. The outlet of the ultrafiltration device is connected to a first pressurization component. The first pressurization component is connected to the inlet of a first-stage reverse osmosis membrane module. The outlet of the first-stage reverse osmosis membrane module is connected to a second pressurization component. The outlet of the second pressurization component is connected to a second-stage reverse osmosis membrane module. A first reflux component is connected between the wastewater end of the electroadsorption device and the equalization tank. A second reflux component is connected between the wastewater end of the ultrafiltration device and the equalization tank.

[0006] As a further embodiment of this utility model: the first reflux assembly includes a first reflux pump, the pumping end of the first reflux pump is connected to a first pumping pipe, one end of the first pumping pipe is connected to the sewage end of the electro-adsorption device, the outlet end of the first reflux pump is connected to the first reflux pipe, and one end of the first reflux pipe is connected to the top of one side of the equalization tank.

[0007] As a further embodiment of this utility model: the second reflux assembly includes a second reflux pump, the pumping end of the second reflux pump is connected to a second pumping pipe, one end of the second pumping pipe is connected to the wastewater end of the ultrafiltration device, the outlet end of the second reflux pump is connected to a second reflux pipe, and one end of the second reflux pipe is connected to the top of one side of the equalization tank.

[0008] As a further embodiment of this utility model: the first booster assembly includes a first booster pump connected to the outlet end of the ultrafiltration device, the outlet end of the first booster pump is connected to a first centralized drain pipe, and the first centralized drain pipe is connected to the inlet of the first-stage reverse osmosis membrane assembly.

[0009] As a further embodiment of this utility model: the second booster assembly includes a second booster pump, the outlet end of the first-stage reverse osmosis membrane assembly is centrally connected to the first outlet pipe, one end of the first outlet pipe is connected to the pumping end of the second booster pump, the outlet end of the second booster pump is connected to a second centralized drain pipe, and the second centralized drain pipe is connected to the inlet of the second-stage reverse osmosis membrane assembly.

[0010] As a further improvement of this utility model, the drain ends of the primary reverse osmosis membrane module and the secondary reverse osmosis membrane module are centrally connected to the drain pipe.

[0011] As a further improvement of this utility model, the outlet end of the secondary reverse osmosis membrane module is centrally connected to the second outlet pipe.

[0012] The beneficial effects of this utility model are as follows:

[0013] The electrocoagulation and electroadsorption technologies used in the treatment process fully utilize the high salt content of metallurgical brine. The process has low energy consumption, low cost, and stable treatment effect. The quality of the recycled water meets the requirements of industrial fresh water. It not only reduces the amount of concentrated brine generated, but also greatly improves the reuse rate of production wastewater and reduces the cost of purchasing fresh water for enterprises. This has important practical significance for the sustainable development of enterprises. Attached Figure Description

[0014] Figure 1 This is a first-view flow diagram of a metallurgical high-salt wastewater treatment device proposed in this utility model.

[0015] Figure 2 This is a second-view flow diagram of a metallurgical high-salt wastewater treatment device proposed in this utility model.

[0016] Figure 3 This is a third-view flow diagram of a metallurgical high-salt wastewater treatment device proposed in this utility model.

[0017] Figure 4 This utility model proposes a metallurgical high-salt wastewater treatment device. Figure 3 Enlarged structural diagram at point A in the middle.

[0018] In the diagram: 1. Equalization tank; 2. Ozone water purifier; 3. Electrocoagulation equipment; 4. Electroadsorption equipment; 5. Ultrafiltration equipment; 6. First booster pump; 7. First-stage reverse osmosis membrane module; 8. Second booster pump; 9. Second-stage reverse osmosis membrane module; 10. Second outlet pipe; 11. First outlet pipe; 12. First centralized drainage pipe; 13. Second centralized drainage pipe; 14. First reflux pump; 15. Second reflux pump; 16. First pumping pipe; 17. First reflux pipe; 18. Second pumping pipe; 19. Second reflux pipe; 20. Sewage pipe. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Example 1, referring to Figure 1-4 A metallurgical high-salt wastewater treatment device includes an equalization tank 1. The outlet of the equalization tank 1 is connected to the inlet of an ozone water purifier 2. The outlet of the ozone water purifier 2 is connected to the inlet of an electrocoagulation device 3. The outlet of the electrocoagulation device 3 is connected to the inlet of an electroadsorption device 4. The outlet of the electroadsorption device 4 is connected to the inlet of an ultrafiltration device 5. The outlet of the ultrafiltration device 5 is connected to a first pressurization component. The first pressurization component is connected to the inlet of a first-stage reverse osmosis membrane module 7. The outlet of the first-stage reverse osmosis membrane module 7 is connected to a second pressurization component. The outlet of the second pressurization component is connected to a second-stage reverse osmosis membrane module 9. A first reflux component is connected between the wastewater end of the electroadsorption device 4 and the equalization tank 1. A second reflux component is connected between the wastewater end of the ultrafiltration device 5 and the equalization tank 1.

[0021] Both the primary reverse osmosis membrane module 7 and the secondary reverse osmosis membrane module 9 are equipped with at least three reverse osmosis membranes to ensure water filtration efficiency.

[0022] The first reflux assembly includes a first reflux pump 14, the pumping end of the first reflux pump 14 is connected to a first pumping pipe 16, one end of the first pumping pipe 16 is connected to the sewage end of the electro-adsorption device 4, the outlet end of the first reflux pump 14 is connected to a first reflux pipe 17, one end of the first reflux pipe 17 is connected to the top of one side of the equalization tank 1.

[0023] The second reflux assembly includes a second reflux pump 15, the pumping end of which is connected to a second pumping pipe 18, one end of which is connected to the wastewater end of the ultrafiltration device 5, and the outlet end of the second reflux pump 15 is connected to a second reflux pipe 19, one end of which is connected to the top of one side of the equalization tank 1.

[0024] The first booster assembly includes a first booster pump 6 connected to the outlet end of the ultrafiltration device 5. The outlet end of the first booster pump 6 is connected to a first centralized drain pipe 12, which is connected to the inlet of the first-stage reverse osmosis membrane assembly 7.

[0025] The second booster assembly includes a second booster pump 8. The outlet of the first-stage reverse osmosis membrane assembly 7 is centrally connected to the first outlet pipe 11. One end of the first outlet pipe 11 is connected to the pumping end of the second booster pump 8. The outlet of the second booster pump 8 is connected to a second centralized drain pipe 13, which is connected to the inlet of the second-stage reverse osmosis membrane assembly 9.

[0026] The outlet end of the secondary reverse osmosis membrane module 9 is centrally connected to the second outlet pipe 10.

[0027] High-salinity wastewater from steel enterprises first enters equalization tank 1, where water quality and quantity are balanced and the pH value is adjusted. The effluent from equalization tank 1 then enters ozone water purifier 2. Under the strong oxidizing effect of ozone, non-biodegradable organic matter in the wastewater is oxidized into easily biodegradable small-molecule organic matter or partially mineralized. The effluent from ozone water purifier 2 then enters electrocoagulation equipment 3. Electrocoagulation equipment 3 uses aluminum-iron plates as electrode material and employs a periodic reversing power supply. The cathode and anode of the electrocoagulation device are exchanged within a certain period, effectively reducing electrode passivation and current drop during the reaction. After electrocoagulation treatment, suspended solids and metal ions such as calcium and magnesium in the wastewater are effectively reduced. The effluent from electrocoagulation equipment 3 then enters electroadsorption equipment 4, where charged electrodes adsorb water... The ions and charged particles of the electro-adsorption device 4 cause dissolved salts and other charged substances to accumulate and concentrate on the surface of the electrode to purify the wastewater. The concentrated water produced by the electro-adsorption device 4 is returned to the front-end equalization tank 1 for circulation treatment through the first return pump 14. The product water after treatment by the electro-adsorption device 4 enters the ultrafiltration device 5, where suspended solids and colloidal pollutants in the wastewater are further removed by the ultrafiltration membrane. The concentrated water of the ultrafiltration device 5 is returned to the equalization tank 1 for circulation treatment through the second return pump 15. The product water of the ultrafiltration device 5 enters the first-stage reverse osmosis membrane module 7 for filtration through the first booster pump 6, which removes most of the salts and small molecule organic matter in the wastewater. The product water of the first-stage reverse osmosis membrane module 7 enters the second-stage reverse osmosis membrane module 9 for further concentration and separation through the second booster pump 8. The product water of the second-stage reverse osmosis membrane module 9 can be reused by fresh water users.

[0028] Among them, the ozone water purifier 2 can be model JCT-1, the electrocoagulation equipment 3 can be model PYE-EC, the electroadsorption equipment 4 can be model NTK-2000T, and the ultrafiltration equipment 5 can be model JDL-13.

[0029] Example 2 is an optimization based on Example 1, specifically:

[0030] The drain ends of the primary reverse osmosis membrane module 7 and the secondary reverse osmosis membrane module 9 are centrally connected to the drain pipe 20.

[0031] This facilitates the centralized discharge of wastewater from the primary reverse osmosis membrane module 7 and the secondary reverse osmosis membrane module 9.

[0032] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A metallurgical high-salinity wastewater treatment plant comprising a conditioning tank (1), characterized in that, The outlet of the regulating tank (1) is connected to the inlet of the ozone water purifier (2), the outlet of the ozone water purifier (2) is connected to the inlet of the electrocoagulation device (3), the outlet of the electrocoagulation device (3) is connected to the inlet of the electroadsorption device (4), the outlet of the electroadsorption device (4) is connected to the inlet of the ultrafiltration device (5), the outlet of the ultrafiltration device (5) is connected to the first pressurization component, the first pressurization component is connected to the inlet of the first-stage reverse osmosis membrane component (7), the outlet of the first-stage reverse osmosis membrane component (7) is connected to the second pressurization component, the outlet of the second pressurization component is connected to the second-stage reverse osmosis membrane component (9), the wastewater end of the electroadsorption device (4) is connected to the regulating tank (1) by a first reflux component, and the wastewater end of the ultrafiltration device (5) is connected to the regulating tank (1) by a second reflux component.

2. The metallurgical high-salinity wastewater treatment device according to claim 1, wherein, The first reflux assembly includes a first reflux pump (14), the pumping end of the first reflux pump (14) is connected to a first pumping pipe (16), one end of the first pumping pipe (16) is connected to the sewage end of the electro-adsorption device (4), the outlet end of the first reflux pump (14) is connected to a first reflux pipe (17), and one end of the first reflux pipe (17) is connected to the top of one side of the regulating tank (1).

3. The metallurgical high-salinity wastewater treatment device of claim 1, wherein, The second reflux assembly includes a second reflux pump (15), the pumping end of the second reflux pump (15) is connected to a second pumping pipe (18), one end of the second pumping pipe (18) is connected to the sewage end of the ultrafiltration device (5), the outlet end of the second reflux pump (15) is connected to a second reflux pipe (19), and one end of the second reflux pipe (19) is connected to the top of one side of the equalization tank (1).

4. The metallurgical high-salinity wastewater treatment device of claim 1, wherein, The first booster assembly includes a first booster pump (6) connected to the outlet of the ultrafiltration device (5), the outlet of the first booster pump (6) is connected to a first centralized drain pipe (12), and the first centralized drain pipe (12) is connected to the inlet of the first-stage reverse osmosis membrane assembly (7).

5. The metallurgical high-salt wastewater treatment device according to claim 4, characterized in that, The second booster assembly includes a second booster pump (8), the outlet of the first-stage reverse osmosis membrane assembly (7) is centrally connected to the first outlet pipe (11), one end of the first outlet pipe (11) is connected to the pumping end of the second booster pump (8), the outlet of the second booster pump (8) is connected to a second centralized drain pipe (13), and the second centralized drain pipe (13) is connected to the inlet of the second-stage reverse osmosis membrane assembly (9).

6. The metallurgical high-salinity wastewater treatment device of claim 5, wherein, The drain ends of the primary reverse osmosis membrane module (7) and the secondary reverse osmosis membrane module (9) are centrally connected to the drain pipe (20).

7. The metallurgical high-salinity wastewater treatment device of claim 5, wherein, The outlet end of the secondary reverse osmosis membrane module (9) is centrally connected to the second outlet pipe (10).

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