A multi-stage metal recovery processing device

Abstract

The utility model discloses a kind of metal recovery multistage processing device, it is related to wastewater treatment technical field.The utility model includes shell and the front processing unit, primary concentration unit and secondary concentration unit connected and installed in shell in proper order;The front processing unit includes Y-shaped filter, primary water inlet valve, primary booster pump, primary bag filter and primary security filter connected in proper order, for filtering and boosting to raw water;The primary concentration unit includes primary water tank, primary high-pressure pump, primary membrane, primary concentration valve, primary transfer valve and primary concentrated water valve.The utility model is integrated with conductivity sensor and moves control transfer valve, realizes the real-time online monitoring and automatic interstage transfer of concentration process, improves the degree of automation and processing efficiency;Meanwhile by setting by concentration valve, PVC three-way valve and the like constitute protection system, can automatically execute online flushing and shutdown protection process, effectively prolongs membrane assembly service life, reduces operation and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a multi-stage metal recycling treatment device. Background Technology

[0002] In industries such as electroplating, electronics, and batteries, the treatment of metal-containing wastewater and the recovery of metal resources have significant environmental and economic value. Membrane separation technologies, such as reverse osmosis (RO) and nanofiltration (NF), have become one of the key technologies for metal recovery due to their high efficiency and energy-saving advantages.

[0003] However, most equipment lacks real-time online monitoring and feedback control of key water quality parameters during the concentration process. Operators must rely on experience or offline sampling to determine the concentration endpoint and manually transfer the concentrate between different concentration units. This manual judgment and operation mode is not only inefficient and labor-intensive, but also prone to inaccurate control of the concentration endpoint, affecting the stability of the final concentrate concentration and recovery rate, and may even lead to membrane fouling risks due to over-concentration. On the other hand, during short-term shutdowns, long-term shutdowns, or chemical cleaning, high concentrations of metal-containing residues may remain in the membrane housing and pipelines for extended periods, easily causing metal hydroxides or salts to crystallize and precipitate on the membrane surface, or forming stubborn fouling. This leads to a sharp decline in membrane flux and desalination rate, severely shortening the service life of membrane elements and increasing the high operating and maintenance costs associated with frequent membrane module replacements.

[0004] Therefore, a multi-stage metal recycling device is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a multi-stage metal recycling device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-stage metal recycling device, comprising a housing and a pre-treatment unit, a primary concentration unit, and a secondary concentration unit sequentially connected and installed within the housing; The pretreatment unit includes a Y-shaped filter, a primary inlet valve, a primary booster pump, a primary bag filter, and a primary safety filter connected in sequence, used to filter and pressurize the raw water; The primary concentration unit includes a primary water tank, a primary high-pressure pump, a primary membrane, a primary concentration adjustment valve, a primary transfer valve, and a primary concentrate valve. The inlet of the primary high-pressure pump is connected to the outlet of the pretreatment unit via a pipeline, and the outlet is connected to the inlet of the primary membrane. The primary concentration adjustment valve is installed on the concentrate outlet pipeline of the primary membrane. The primary transfer valve and the primary concentrate valve are used to control the transfer of the concentrate produced by the primary membrane to the secondary concentration unit or its return to the primary water tank. The secondary concentration unit includes a secondary water tank, a secondary high-pressure pump, a secondary membrane, a secondary concentration adjustment valve, a secondary transfer valve, and a secondary concentrate valve. The inlet of the secondary high-pressure pump is connected to the output of the primary concentration unit via a pipeline, and the outlet is connected to the inlet of the secondary membrane. The secondary concentration adjustment valve is installed on the concentrate outlet pipeline of the secondary membrane. The secondary transfer valve and the secondary concentrate valve are used to control the output of the concentrate produced by the secondary membrane to the secondary water tank or its return.

[0007] Furthermore, it also includes components for monitoring and controlling water quality: the primary concentration unit is equipped with a primary inlet water conductivity sensor, a primary acid pump, and a primary alkali pump; the secondary concentration unit is equipped with a secondary inlet water conductivity sensor, a secondary acid pump, and a secondary alkali pump; the signals from the primary inlet water conductivity sensor and the secondary inlet water conductivity sensor are used to control the switching of the primary transfer valve and the secondary transfer valve, respectively.

[0008] Furthermore, the secondary concentration unit also includes a chiller for cooling the inlet water and a secondary booster pump for providing stable inlet water pressure; the secondary booster pump is located on the pipeline between the chiller and the secondary high-pressure pump.

[0009] Furthermore, it also includes components for system cleaning and shutdown protection: PVC three-way valves are installed on the inlet pipes of both the primary and secondary concentration units to switch the water flow path during operation, cleaning, and shutdown; both the primary and secondary concentration units are equipped with manual vent valves.

[0010] Furthermore, it also includes multiple pressure sensors, liquid level sensors, and temperature sensors; the pressure sensors are respectively installed at the inlet of the first-stage booster pump, the outlet of the first-stage high-pressure pump, the outlet of the second-stage booster pump, and the outlet of the second-stage high-pressure pump; the liquid level sensors are respectively installed in the first-stage water tank and the second-stage water tank; the temperature sensors are respectively installed on the water inlet pipes of the first-stage concentration unit and the second-stage concentration unit.

[0011] Furthermore, both the primary and secondary membranes are spiral wound reverse osmosis membranes or nanofiltration membrane modules; the primary and secondary concentration valves are in a throttling state during the concentration process to maintain the pressure before the membrane, and switch to a fully open state during the automatic flushing process.

[0012] The beneficial effects of this utility model are as follows: 1. This utility model integrates a primary inlet water conductivity sensor and a secondary inlet water conductivity sensor, and uses their signals to control the primary and secondary transfer valves respectively, achieving real-time online monitoring and feedback of water quality during the concentration process. When the water quality reaches the preset concentration standard, the system automatically triggers valve switching, completing the intelligent inter-stage transfer of concentrate from the primary to the secondary stage and then to the final output. This effectively overcomes the problems of low efficiency and poor stability caused by the reliance on manual judgment and operation in traditional devices, significantly improving the automation level, processing efficiency, and accuracy of concentration endpoint control in the metal recovery process.

[0013] 2. This utility model achieves systematic protection of the membrane module by setting up a control system consisting of a primary concentration valve and a secondary concentration valve, a PVC three-way valve, and related pipelines in the primary and secondary concentration units, respectively, and combining it with the set control logic. During operation, the concentration valve can be switched between throttling and full opening to perform periodic instantaneous high-flow-rate flushing, effectively removing contaminants from the membrane surface. During short-term and long-term shutdowns, it can automatically execute standardized protection procedures including clean water replacement and evacuation, thereby reducing the risk of membrane module damage due to high-concentration residual liquid contamination, crystallization, or improper shutdown, thus extending the membrane's service life and reducing system maintenance frequency and operating costs. Attached Figure Description

[0014] Figure 1 This is a front view of the structure of this utility model; Figure 2 This is a rear view of the structure of this utility model; Figure 3 This is a side view of the structure of this utility model; Figure 4 This is a right view of the structure of this utility model; Figure reference numerals: 1. Primary acid pump, 2. Secondary acid pump, 3. Liquid level sensor, 4. Primary alkali pump, 5. Secondary alkali pump, 6. Primary safety filter, 7. Secondary safety filter, 8. Primary bag filter, 9. Manual vent valve, 10. Chiller, 11. Pressure sensor, 12. Primary booster pump, 13. Secondary booster pump, 14. Temperature sensor, 15. Secondary inlet water conductivity sensor, 16. PVC three-way valve, 17. Y-type filter, 18. Secondary high-pressure pump, 19. Secondary concentrate valve, 20. Secondary product water flow meter, 21. Return water valve, 22. Secondary product water valve, 23. Secondary transfer valve, 24. Primary concentrate adjustment valve, 25. Secondary concentrate adjustment valve, 26. Primary concentrate valve, 27. Check valve, 28. Flow sensor, 29. Primary inlet water conductivity sensor, 30. Primary membrane, 31. Primary high-pressure pump, 32. Primary transfer valve, 33. Primary inlet valve, 34. Secondary membrane, 35. Primary product water valve, 36. Housing. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that provides control.

[0019] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] like Figures 1 to 4 As shown, a multi-stage metal recycling device includes a housing 36 and a pretreatment unit, a primary concentration unit, and a secondary concentration unit that are sequentially connected and installed within the housing 36. The pretreatment unit includes a Y-shaped filter 17, a primary inlet valve 33, a primary booster pump 12, a primary bag filter 8, and a primary safety filter 6 connected in sequence, which are used to filter and pressurize the raw water. The primary concentration unit includes a primary water tank, a primary high-pressure pump 31, a primary membrane 30, a primary concentration adjustment valve 24, a primary transfer valve 32, and a primary concentrate valve 26. The inlet of the primary high-pressure pump 31 is connected to the outlet of the pretreatment unit via a pipeline, and the outlet is connected to the inlet of the primary membrane 30. The primary concentration adjustment valve 24 is installed on the concentrate outlet pipeline of the primary membrane 30. The primary transfer valve 32 and the primary concentrate valve 26 are used to control the transfer of the concentrate produced by the primary membrane 30 to the secondary concentration unit or its return to the primary water tank. The secondary concentration unit includes a secondary water tank, a secondary high-pressure pump 18, a secondary membrane 34, a secondary concentration adjustment valve 25, a secondary transfer valve 23, and a secondary concentrate valve 19. The inlet of the secondary high-pressure pump 18 is connected to the output of the primary concentration unit via a pipeline, and the outlet is connected to the inlet of the secondary membrane 34. The secondary concentration adjustment valve 25 is installed on the concentrate outlet pipeline of the secondary membrane 34. The secondary transfer valve 23 and the secondary concentrate valve 19 are used to control the output of the concentrate produced by the secondary membrane 34 to the secondary water tank or back to the secondary water tank.

[0021] The raw metal-containing water undergoes multi-stage precision filtration in the pretreatment unit to remove particulate impurities and protect subsequent membrane modules. It then enters the primary concentration unit for initial concentration, with the primary concentrate being recirculated to increase its concentration. The concentrate, meeting the initial concentration standards, is then transferred to the secondary unit for further concentration via the primary transfer valve 32. This two-stage series architecture, coupled with an independently controllable valve system, constitutes a multi-stage concentration route, achieving efficient, stepwise enrichment of metal ions and laying the foundation for subsequent automated control and protection.

[0022] It also includes components for monitoring and controlling water quality: the primary concentration unit is equipped with a primary inlet water conductivity sensor 29, a primary acid pump 1, and a primary alkali pump 4; the secondary concentration unit is equipped with a secondary inlet water conductivity sensor 15, a secondary acid pump 2, and a secondary alkali pump 5; the signals from the primary inlet water conductivity sensor 29 and the secondary inlet water conductivity sensor 15 are used to control the switching of the primary transfer valve 32 and the secondary transfer valve 23, respectively. It should be noted that the primary inlet water conductivity sensor 29 monitors the conductivity of the concentrate entering the primary membrane 30 in real time. When the conductivity reaches a preset first threshold, representing the end point of primary concentration, the controller automatically closes the primary concentrate valve 26 and opens the primary transfer valve 32, introducing the primary concentrate into the secondary water tank; similarly, the secondary inlet water conductivity sensor 15 monitors the secondary concentration process, and after reaching the final concentration standard, controls the secondary transfer valve 23 to open and discharge. Meanwhile, by directly linking the online water quality monitoring signal with the actuator valve, the traditional manual sampling and operation are replaced. This not only improves work efficiency and the accuracy of concentration endpoint determination, but also ensures the consistency of results for each operation and overcomes the instability caused by human factors.

[0023] The secondary concentration unit also includes a chiller 10 for cooling the inlet water and a secondary booster pump 13 for providing stable inlet water pressure; the secondary booster pump 13 is located on the pipeline between the chiller 10 and the secondary high-pressure pump 18. It should be noted that the concentrate from the primary concentration unit may experience a temperature increase due to the pump's operation. The chiller 10 effectively reduces this temperature, preventing high temperatures from negatively impacting the performance and lifespan of the secondary membrane 34. The secondary booster pump 13 ensures sufficient flow and pressure of water to supply the secondary high-pressure pump 18, preventing cavitation or insufficient inlet water. Simultaneously, this cooling and pressurization pretreatment creates stable inlet water conditions for the secondary concentration unit, ensuring the secondary membrane operates under optimal conditions, thereby improving the efficiency and stability of the entire secondary concentration stage.

[0024] It also includes components for system cleaning and shutdown protection: PVC three-way valves 16 are installed on the inlet pipes of both the primary and secondary concentration units to switch the water flow path during operation, cleaning, and shutdown; both the primary and secondary concentration units are equipped with manual vent valves 9. More specifically, the PVC three-way valve 16 is a key component for switching between different operating modes such as operation, flushing, and shutdown protection. In automatic flushing mode, the controller can periodically switch the PVC three-way valve 16 to connect with the cleaning port 21, and simultaneously switch the primary concentration valve 24 or the secondary concentration valve 25 to the fully open state, using cleaning fluid or clean water to perform high-flow, low-pressure flushing of the membrane module, effectively washing away contaminants on the membrane surface. In shutdown protection mode, after the system automatically performs the clean water replacement process, the residual liquid in the membrane housing and pipelines can be completely drained through the manual vent valve 9. In this structure, the PVC three-way valve 16, concentration valves 24 and 25, vent valve 9 and control system work together to form a complete and programmable membrane protection solution. It can automatically perform standardized protection operations for daily maintenance, short-term shutdown and long-term shutdown in different scenarios, reducing the risk of membrane contamination and damage caused by operational negligence or improper protection.

[0025] It also includes multiple pressure sensors 11, level sensors 3, and temperature sensors 14. Pressure sensors 11 are respectively installed at the inlet of the primary booster pump 12, the outlet of the primary high-pressure pump 31, the outlet of the secondary booster pump 13, and the outlet of the secondary high-pressure pump 18. Level sensors 3 are respectively installed in the primary and secondary water tanks. Temperature sensors 14 are respectively installed on the inlet pipes of the primary and secondary concentration units. It should be noted that pressure sensors 11 monitor the pressure at key points and can be used to determine filter blockage, pump malfunctions, etc.; level sensors 3 prevent water tank overflow or pump cavitation; temperature sensors 14 monitor the inlet water temperature and are interlocked with the chiller 10 for control.

[0026] Both the primary membrane 30 and the secondary membrane 34 are spiral wound reverse osmosis or nanofiltration membrane modules. The primary concentration valve 24 and the secondary concentration valve 25 are in a throttling state during concentration to maintain the membrane inlet pressure, and switch to a fully open state during automatic flushing. It should be noted that spiral wound membrane modules have a high packing density, making them suitable for integrated systems. The concentration valves 24 and 25 have a dual function: during normal concentration, they precisely control the membrane inlet pressure and recovery rate by adjusting their opening; during automatic flushing or protection procedures triggered by the system, they switch to a fully open state to minimize pipeline resistance and achieve high-flow-rate flushing. In this structure, the programmable control of the concentration valves, combined with the characteristics of the membrane modules, meets the process requirements of high-pressure concentration while also performing efficient physical cleaning, enhancing both cleaning and protection effects.

[0027] In summary: Metal-containing wastewater first enters the pretreatment unit, where it is filtered stage by stage Y-type filter 17, primary bag filter 8, and primary safety filter 6. It is then pressurized by primary booster pump 12 and enters the primary concentration unit. Driven by primary high-pressure pump 31, the water flows through primary membrane 30 for separation. The treated water is either discharged or reused, while the concentrated water is returned to the primary water tank for further concentration under the control of primary concentrate valve 26. Primary inlet water conductivity sensor 29 monitors the conductivity of the circulating concentrated water in real time. When the set value is reached, the controller automatically switches the valve, allowing the concentrated water to enter the secondary concentration unit via primary transfer valve 32. In the secondary concentration unit, the concentrated water is first cooled by chiller 10, pressure stabilized by secondary booster pump 13, and then pressurized by secondary high-pressure pump 18 before entering secondary membrane 34 for deep concentration. Secondary inlet water conductivity sensor 15 monitors the concentration process; once the target is reached, it controls the secondary transfer valve 23 to open, outputting a high-concentration metal concentrate. During operation or shutdown, the system can automatically perform protective operations such as online flushing, clean water replacement, and evacuation by controlling the PVC three-way valve 16 and concentration valves (24, 25) according to preset programs. Therefore, this device achieves fully automatic concentration and transfer through intelligent monitoring and feedback control, and effectively maintains the performance of the membrane module through a systematic protection mechanism, ultimately achieving the goal of efficient, stable, and low-consumption metal recovery.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage metal recycling processing device, characterized in that, Includes a housing (36) and a pretreatment unit, a primary concentration unit and a secondary concentration unit connected in sequence and installed inside the housing (36); The pretreatment unit includes a Y-shaped filter (17), a primary inlet valve (33), a primary booster pump (12), a primary bag filter (8), and a primary safety filter (6) connected in sequence, for filtering and pressurizing the raw water; The primary concentration unit includes a primary water tank, a primary high-pressure pump (31), a primary membrane (30), a primary concentration adjustment valve (24), a primary transfer valve (32), and a primary concentrate valve (26); wherein, the inlet of the primary high-pressure pump (31) is connected to the outlet of the pretreatment unit through a pipeline, and the outlet is connected to the inlet of the primary membrane (30); the primary concentration adjustment valve (24) is installed on the concentrate outlet pipeline of the primary membrane (30); the primary transfer valve (32) and the primary concentrate valve (26) are respectively used to control the transfer of the concentrate produced by the primary membrane (30) to the secondary concentration unit or back to the primary water tank; The secondary concentration unit includes a secondary water tank, a secondary high-pressure pump (18), a secondary membrane (34), a secondary concentration adjustment valve (25), a secondary transfer valve (23), and a secondary concentrate valve (19). The inlet of the secondary high-pressure pump (18) is connected to the output end of the primary concentration unit through a pipeline, and the outlet is connected to the inlet of the secondary membrane (34). The secondary concentration adjustment valve (25) is installed on the concentrate outlet pipeline of the secondary membrane (34). The secondary transfer valve (23) and the secondary concentrate valve (19) are used to control the output of the concentrate produced by the secondary membrane (34) to the secondary water tank or back to the secondary water tank.

2. The multi-stage metal recycling processing device according to claim 1, characterized in that, It also includes components for monitoring and controlling water quality: the primary concentration unit is equipped with a primary inlet water conductivity sensor (29), a primary acid pump (1) and a primary alkali pump (4); the secondary concentration unit is equipped with a secondary inlet water conductivity sensor (15), a secondary acid pump (2) and a secondary alkali pump (5); the signals from the primary inlet water conductivity sensor (29) and the secondary inlet water conductivity sensor (15) are used to control the switching of the primary transfer valve (32) and the secondary transfer valve (23), respectively.

3. The multi-stage metal recycling processing device according to claim 1, characterized in that, The secondary concentration unit also includes a chiller (10) for cooling the inlet water and a secondary booster pump (13) for providing stable inlet water pressure; the secondary booster pump (13) is located on the pipeline between the chiller (10) and the secondary high-pressure pump (18).

4. The multi-stage metal recycling processing device according to claim 1, characterized in that, It also includes components for system cleaning and shutdown protection: PVC three-way valves (16) are installed on the water inlet pipes of the primary concentration unit and the secondary concentration unit to switch the water flow path during operation, cleaning and shutdown; and manual vent valves (9) are provided in both the primary concentration unit and the secondary concentration unit.

5. A multi-stage metal recycling processing device according to claim 1, characterized in that, It also includes multiple pressure sensors (11), liquid level sensors (3) and temperature sensors (14); the pressure sensors (11) are respectively installed at the inlet of the first-stage booster pump (12), the outlet of the first-stage high-pressure pump (31), the outlet of the second-stage booster pump (13) and the outlet of the second-stage high-pressure pump (18); the liquid level sensors (3) are respectively installed in the first-stage water tank and the second-stage water tank; the temperature sensors (14) are respectively installed on the water inlet pipes of the first-stage concentration unit and the second-stage concentration unit.

6. The multi-stage metal recycling processing device according to claim 5, characterized in that, The primary membrane (30) and the secondary membrane (34) are both spiral wound reverse osmosis membranes or nanofiltration membrane modules; the primary concentration valve (24) and the secondary concentration valve (25) are in a throttling state during the concentration process to maintain the pressure in front of the membrane, and switch to a fully open state during the automatic flushing process.

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