Treatment device system and method for recycling grinding wastewater

Abstract

According to the treatment device system and method for recycling the grinding wastewater, the first separation device, the second separation device, the precipitation device, the solar distillation device and the sterilization device are combined and matched for use, and a multi-stage physical treatment means is used for removing a grinding agent and copper cuttings in the grinding wastewater; all indexes of the treated water quality meet the grinding water requirement, the water resource utilization rate is increased, chemicals such as a coagulant do not need to be added in the filtering process, the water quality effect after filtering is prevented from being affected by the coagulation agent, and the water resource consumption and the operation cost are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, and relates to a treatment device system and method for recycling grinding wastewater. Background Art

[0002] In the prior art, a heat dissipation cover is often introduced into the packaging structure to enhance heat dissipation, and a thermal conductive interface material is added between the heat dissipation cover and the back of the chip to enhance the heat dissipation efficiency of the heat dissipation path. In the process of manufacturing the heat dissipation cover, mechanical grinding is required, and abrasives are usually added during the grinding process. The main components of the abrasives used are aluminum oxide and iron oxide. After grinding, water washing is performed, and grinding wastewater is generated during the washing process. The grinding wastewater contains a large amount of copper and grinding waste.

[0003] If grinding wastewater is discharged directly, it will not only increase the difficulty of wastewater treatment, but also waste copper and abrasive resources. Therefore, the flocculation-sedimentation-filtration-chemical treatment process is usually selected to treat grinding wastewater, and flocculants are added to the grinding wastewater to cause the suspended particles in the wastewater to condense and precipitate. After the coagulant is added to the wastewater, the colloids and dispersed particles of the suspended matter collide and condense with each other due to the effect of molecular attraction to form flocs. During the sedimentation process, the size and mass continue to increase, and the sedimentation rate increases with the depth.

[0004] Although this process is widely used and the technology is mature, it also has disadvantages such as large footprint, frequent backwashing and high operating costs. The water quality treatment effect will also be unstable due to the influence of coagulants, which directly affects the efficient operation of the wastewater treatment system.

[0005] In summary, there is an urgent need to design a treatment device system and method for grinding wastewater reuse to meet the needs of practical applications. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a treatment device system and method for the reuse of grinding wastewater, which adopts a first separation device, a second separation device, a sedimentation device, a solar distillation device and a sterilization device in combination, and utilizes multi-stage physical treatment means to remove abrasives and copper chips in the grinding wastewater, so that the various indicators of the treated water quality meet the requirements of grinding water, which not only improves the utilization rate of water resources, but also reduces water resource consumption and operating costs.

[0007] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a treatment device system for grinding wastewater reuse, the treatment device system comprising a grinding wastewater collection device, a first separation device, a second separation device, a precipitation device, a solar distillation device and a sterilization device connected in sequence;

[0009] The grinding wastewater collection device is provided with an aeration pipe;

[0010] The first separation device includes a magnetic separation device;

[0011] The first separation device is independently provided with a magnetic material outlet and a non-magnetic material outlet; the magnetic material outlet is connected to the abrasive collecting device; the non-magnetic material outlet is connected to the second separation device;

[0012] The second separation device comprises a filtering centrifugal device, wherein the filtering centrifugal device is provided with a first filtering membrane and a second filtering membrane in sequence from top to bottom;

[0013] The second separation device is independently provided with a first outlet, a second outlet and a third outlet; the first outlet is connected to a waste copper collecting device; the second outlet is connected to an abrasive collecting device; and the third outlet is connected to the precipitation device.

[0014] In the present invention, the grinding wastewater generated by the grinding device can be first collected through an open flow trough and then transferred to a grinding wastewater collection device for centralized treatment.

[0015] In the present invention, a wastewater collection tank may also be provided on the pipeline connecting the precipitation device and the third outlet, and those skilled in the art may configure the tank based on experience and process requirements.

[0016] The treatment device system provided by the present invention adopts a combination of a first separation device, a second separation device, a precipitation device, a solar distillation device and a sterilization device to remove abrasives and copper chips in grinding wastewater without using acid-base regulators, coagulants and other chemicals, and the obtained recycled water can meet the use standards of grinding water, thereby improving the utilization rate of wastewater. It can not only reduce dependence on natural water resources and reduce production costs, but also achieve zero pollution and zero emissions.

[0017] It is worth mentioning that by installing an aeration pipe in the grinding wastewater collection device, the blockage of the conveying pipeline by waste abrasives and copper chips can be avoided, ensuring that they can be transported to the magnetic separation device, and then the strong magnetic field of the magnetic separation device is used to separate the iron oxide component in the abrasive from the non-magnetic substance (aluminum oxide component in the abrasive, copper chips and wastewater), avoiding the influence of iron oxide on subsequent separation. Subsequently, a filtering centrifugal device with a specific structure and composition is used to separate aluminum oxide, copper chips and wastewater. Finally, the wastewater is deeply purified by the combination of a sedimentation device, a solar distillation device and a sterilization device, and the treated recycled water can meet the use standards of grinding water.

[0018] As a preferred technical solution of the present invention, the aeration pipe is coiled and arranged on the inner wall of the grinding wastewater collection device.

[0019] Preferably, a plurality of self-closing holes are evenly formed on the wall of the aeration tube, and the self-closing holes automatically open when oxygen is supplied, and automatically close when oxygen supply stops.

[0020] In the present invention, the material of the aeration tube includes rubber; a plurality of self-closing holes are arranged on the aeration tube, and the self-closing holes will automatically open under air pressure during aeration operation, and air will enter the device for oxygenation; if the pressure disappears, the self-closing holes will automatically close to prevent water from flowing back into the self-closing holes.

[0021] It should be noted that the bubbles and stirring effect generated during aeration help prevent sludge from settling at the bottom of the grinding wastewater collection device. Aeration can keep the waste abrasive and copper chips in suspension and then pumped into the first separation device through the lifting pump.

[0022] Preferably, the diameter of the self-closing foramen is 0.5-3 mm, for example, it can be 0.6 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2 mm, 2.2 mm, 2.5 mm, 2.6 mm or 2.8 mm, but is not limited to the listed values, and other values ​​within the numerical range are also applicable.

[0023] As a preferred technical solution of the present invention, the pore size of the first filter membrane is 90-110 μm, for example, it can be 92 μm, 95 μm, 96 μm, 98 μm, 100 μm, 102 μm, 105 μm, 106 μm or 108 μm, but is not limited to the listed values, and other values ​​within the numerical range are also applicable.

[0024] Preferably, the first filter membrane comprises a polyamide (PA) membrane containing an antimicrobial agent.

[0025] The antimicrobial agent used in the present invention is not particularly limited as long as it can impart antimicrobial properties to the polyamide film, and can be appropriately selected from commonly used antimicrobial agents. For example, silver nanoparticles can be selected.

[0026] Preferably, the first filter membrane is used to separate copper chips from grinding wastewater.

[0027] It should be noted that by controlling the pore size range and component selection of the first filter membrane, the copper chips in the grinding wastewater can be selectively separated.

[0028] As a preferred technical solution of the present invention, the pore size of the second filter membrane is 15-25μm, for example, it can be 16μm, 17μm, 18μm, 19μm, 20μm, 21μm, 22μm, 23μm or 24μm, but is not limited to the listed values, and other values ​​within the numerical range are also applicable.

[0029] Preferably, the second filter membrane comprises a polytetrafluoroethylene (PTFE) membrane containing an antimicrobial agent.

[0030] Preferably, the second filter membrane is used to separate abrasive from wastewater.

[0031] It should be noted that by controlling the pore size range and component selection of the second filter membrane, the PTFE membrane is a hydrophobic membrane that can quickly separate the grinding wastewater from the abrasive.

[0032] As a preferred technical solution of the present invention, the sedimentation device includes a conical sedimentation tank.

[0033] Preferably, the solar distillation device comprises a distillation chamber, a condensation chamber and a water collection tank which are connected in sequence.

[0034] Preferably, the water outlet of the precipitation device is connected to the distillation chamber.

[0035] Preferably, a solar panel is provided on the top of the distillation chamber, and the solar panel is connected to a battery pack via a wire.

[0036] In the present invention, solar energy is used to heat the distillation chamber, and excess solar energy can be stored in a battery pack; in rainy weather, the battery pack is used to heat the distillation chamber again.

[0037] Preferably, a sewage discharge pipe is provided at the bottom of the distillation chamber.

[0038] Preferably, the condensation chamber is connected to the water collecting tank through a distilled water outflow pipe.

[0039] In the present invention, waste water is distilled by a solar distillation device, more than 90% of distilled water can be separated after condensation, and the waste water is gasified by solar energy heating, which avoids energy consumption and environmental pollution to a certain extent.

[0040] Preferably, the water collection tank is connected to the sterilization device.

[0041] As a preferred technical solution of the present invention, the sterilization device includes an ultraviolet sterilization device.

[0042] In the present invention, ultraviolet rays are used for sterilization treatment to obtain water or recycled water that meets the discharge standards.

[0043] Preferably, the sterilization device is connected to the filtering device and the grinding device in sequence.

[0044] In the present invention, after sterilization, a filtering step is performed, and the recycled water can be directly recycled to the grinding device.

[0045] As a preferred technical solution of the present invention, a first lifting pump is provided on the pipeline connecting the grinding wastewater collecting device and the first separating device.

[0046] Preferably, a second lift pump is provided on the pipeline connecting the first separation device and the second separation device.

[0047] Preferably, a third boost pump is provided on the pipeline connecting the precipitation device and the solar distillation device.

[0048] In a second aspect, the present invention provides a method for treating grinding wastewater for reuse, the method being carried out using the treatment device system described in the first aspect, and specifically comprising:

[0049] (1) collecting the grinding wastewater into a grinding wastewater collection device and aerating it, then pumping the grinding wastewater into a first separation device for magnetic separation to obtain magnetic material and non-magnetic material, then pumping the non-magnetic material into a second separation device for filtration separation to obtain copper chips, abrasives and wastewater;

[0050] (2) The wastewater obtained in step (1) is transported to a sedimentation device, and the precipitated wastewater is pumped into a solar distillation device for distillation to obtain distilled water and sludge. The obtained distilled water is sterilized in a sterilization device and then reused in the grinding device.

[0051] The treatment method provided by the present invention utilizes multi-stage physical treatment means to remove abrasives and copper chips in grinding wastewater, so that various indicators of water quality after treatment meet the requirements of grinding water. It not only improves the utilization rate of water resources, but also eliminates the need to add chemicals such as coagulants during filtration, thus avoiding the influence of coagulants on the water quality after filtration, and also reduces water resource consumption and operating costs.

[0052] As a preferred technical solution of the present invention, the grinding wastewater in step (1) includes grinding wastewater from a heat dissipation cover.

[0053] Preferably, the magnetic field strength of the magnetic separation in step (1) is 10000-16000 Gs, for example, it can be 11000 Gs, 12000 Gs, 13000 Gs, 14000 Gs or 15000 Gs, but is not limited to the listed values, and other values ​​within the numerical range are also applicable.

[0054] Preferably, the magnetic substance in step (1) comprises iron oxide.

[0055] Preferably, the rotation speed of the filtering separation in step (1) is 4000-10000 rpm, for example, it can be 5000 rpm, 6000 rpm, 7000 rpm, 8000 rpm or 9000 rpm, but is not limited to the listed values, and other values ​​within the numerical range are also applicable.

[0056] Preferably, the abrasive in step (1) comprises aluminum oxide.

[0057] In the present invention, the main components of the abrasive include iron oxide and aluminum oxide.

[0058] As a preferred technical solution of the present invention, the sludge in step (2) is dehydrated and the resulting wastewater is pumped into a solar distillation device.

[0059] In the present invention, the sludge is dehydrated by a filter press, and the resulting wastewater enters the solar distillation device again, and the dehydrated sludge is used as solid waste.

[0060] Preferably, the sterilization in step (2) is followed by filtration.

[0061] The numerical range described in the present invention not only includes the point values ​​listed above, but also includes any point values ​​between the above numerical ranges that are not listed. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values ​​included in the range.

[0062] Compared with the prior art, the present invention has the following beneficial effects:

[0063] (1) The treatment device system provided by the present invention uses a combination of a first separation device, a second separation device, a precipitation device, a solar distillation device and a sterilization device to remove abrasives and copper chips in grinding wastewater without using acid-base regulators, coagulants and other chemicals. The recycled water obtained can meet the use standard of grinding water, thereby improving the utilization rate of wastewater, reducing dependence on natural water resources and reducing production costs, and achieving zero pollution and zero emissions.

[0064] (2) The treatment method provided by the present invention utilizes multi-stage physical treatment means to remove abrasives and copper chips from grinding wastewater, so that various indicators of the treated water quality meet the requirements for grinding water, and the wastewater is converted into reusable water resources to maximize resource utilization and protect the environment; wherein the SS content of the recycled water is less than 0.5 mg / L and the turbidity is less than 0.5°. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 This is a schematic diagram of the treatment device system for grinding wastewater reuse provided in Example 1.

[0066] Among them, 1-grinding wastewater collection device, 2-first separation device, 3-second separation device, 4-wastewater collection tank, 5-precipitation device, 6-solar distillation device, 7-sterilization device, 8-filtration device, 9-grinding device, 10-abrasive collection device, 11-waste copper collection device, 12-first lifting pump, 13-second lifting pump, 14-third lifting pump. DETAILED DESCRIPTION

[0067] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0068] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and through specific implementation methods. However, the following examples are only simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

[0069] In the following embodiments and comparative examples, the grinding wastewater is all heat dissipation cover grinding wastewater, and its SS (suspended solids concentration) content is 500 mg / L and the turbidity is 70°; the grinding wastewater generated by the grinding device is first collected through an open flow trough, and then transferred to a grinding wastewater collection device for centralized treatment.

[0070] Example 1

[0071] This embodiment provides a treatment device system and a treatment method for grinding wastewater reuse, such as Figure 1 As shown, the treatment device system includes a grinding wastewater collection device 1, a first separation device 2, a second separation device 3, a wastewater collection tank 4, a sedimentation device 5, a solar distillation device 6, a sterilization device 7 and a filtering device 8 connected in sequence;

[0072] The grinding wastewater collection device 1 is provided with an aeration pipe; the aeration pipe is arranged in a coiled manner on the inner wall of the grinding wastewater collection device; a plurality of self-closing holes are evenly opened on the wall of the aeration pipe; the self-closing holes automatically open when oxygen is supplied and automatically close when oxygen supply ends; the diameter of the self-closing holes is 1.5 mm; a first lifting pump 12 is provided on the pipeline connecting the grinding wastewater collection device 1 and the first separation device 2;

[0073] The first separation device 2 is a magnetic separation device; the first separation device 2 is independently provided with a magnetic material outlet and a non-magnetic material outlet; the magnetic material outlet is connected to the abrasive collecting device 10; the non-magnetic material outlet is connected to the second separation device 3; a second lifting pump 13 is provided on the pipeline connecting the first separation device 2 and the second separation device 3;

[0074] The second separation device 3 is a filtering centrifugal device, which is provided with a first filter membrane and a second filter membrane in order from top to bottom; the pore size of the first filter membrane is 100 μm; the first filter membrane is a PA membrane containing an antibacterial agent; the pore size of the second filter membrane is 20 μm; the second filter membrane is a PTFE membrane containing an antibacterial agent;

[0075] The second separation device 3 is independently provided with a first outlet, a second outlet and a third outlet; the first outlet is connected to the waste copper collection device 11; the second outlet is connected to the abrasive collection device 10; the third outlet is connected to the waste water collection tank 4;

[0076] A third boost pump 14 is provided on the pipeline connecting the precipitation device 5 and the solar distillation device 6;

[0077] The filtering device 8 is connected to the grinding device 9 .

[0078] The processing method is carried out using the processing device system provided in Example 1, and specifically includes:

[0079] (1) collecting the grinding wastewater into the grinding wastewater collection device 1 and aerating it, and then pumping the aerated grinding wastewater into the first separation device 2 at a magnetic field strength of 12000 Gs through the first lifting pump 12 for magnetic separation to obtain iron oxide and non-magnetic substances, and then pumping the non-magnetic substances into the second separation device 3 at a rotation speed of 7000 rpm through the second lifting pump 13 for filtering separation to obtain copper chips, aluminum oxide and wastewater;

[0080] The obtained copper scraps enter the waste copper collection device 11; the obtained iron oxide and aluminum oxide enter the abrasive collection device 10; the obtained waste water enters the waste water collection tank 4;

[0081] (2) transporting the wastewater in the wastewater collection tank 4 of step (1) to the sedimentation device 5, and pumping the precipitated wastewater into the solar distillation device 6 through the third lift pump 14 for distillation to obtain distilled water and sludge;

[0082] The obtained distilled water is sterilized by the sterilization device 7 and filtered by the filtering device 8 in turn to obtain recycled water which is reused in the grinding device 9; the obtained sludge is dehydrated, and the obtained wastewater is pumped into the solar distillation device 6, and the dehydrated sludge is used as solid waste.

[0083] Example 2

[0084] This embodiment provides a treatment device system and a treatment method for grinding wastewater reuse, which further defines the following on the basis of Embodiment 1:

[0085] The sedimentation device is a conical sedimentation tank;

[0086] The solar distillation device comprises a distillation chamber, a condensation chamber and a water collection tank which are connected in sequence; the water outlet of the precipitation device is connected to the distillation chamber; a solar panel is arranged on the top of the distillation chamber, and the solar panel is connected to the battery pack through a wire; a sewage pipe is arranged at the bottom of the distillation chamber; the condensation chamber is connected to the water collection tank through a distilled water outflow pipe; the water collection tank is connected to the sterilization device;

[0087] The sterilization device is an ultraviolet sterilization device.

[0088] Example 3

[0089] This embodiment provides a treatment device system and a treatment method for grinding wastewater reuse. Except that the diameter of the self-closing hole is 0.5 mm, the pore size of the first filter membrane is 90 μm, and the pore size of the second filter membrane is 15 μm, other conditions are the same as those in Example 2.

[0090] Example 4

[0091] This embodiment provides a treatment device system and a treatment method for grinding wastewater reuse. Except that the pore size of the first filter membrane is 50 μm, other conditions are the same as those of Example 2.

[0092] Example 5

[0093] This embodiment provides a treatment device system and a treatment method for grinding wastewater reuse. Except that the pore size of the first filter membrane is 200 μm, other conditions are the same as those of Example 2.

[0094] Example 6

[0095] This embodiment provides a treatment device system and a treatment method for grinding wastewater reuse. Except that the pore size of the second filter membrane is 50 μm, other conditions are the same as those of Example 2.

[0096] Example 7

[0097] This embodiment provides a treatment device system and a treatment method for grinding wastewater reuse. Except that the first filter membrane and the second filter membrane are both PA membranes containing antibacterial agents, other conditions are the same as those of Example 2.

[0098] Example 8

[0099] This embodiment provides a treatment device system and a treatment method for grinding wastewater reuse. Except that the first filter membrane and the second filter membrane are both PTFE membranes containing an antibacterial agent, other conditions are the same as those of Example 2.

[0100] Comparative Example 1

[0101] This comparative example provides a treatment device system and a treatment method for grinding wastewater reuse. Except that the grinding wastewater collection device is not provided with an aeration pipe, other conditions are the same as those of Example 2.

[0102] Comparative Example 2

[0103] This comparative example provides a treatment device system and a treatment method for grinding wastewater reuse. Except that the treatment device system is not provided with a first separation device, other conditions are the same as those of Example 2.

[0104] Comparative Example 3

[0105] This comparative example provides a treatment device system and a treatment method for grinding wastewater reuse. Except for swapping the first separation device and the second separation device in the treatment device system, other conditions are the same as those in Example 2.

[0106] Comparative Example 4

[0107] This comparative example provides a treatment device system and a treatment method for grinding wastewater reuse. Except that only a first filter membrane is provided in the filtering centrifugal device, other conditions are the same as those in Example 2.

[0108] Comparative Example 5

[0109] This comparative example provides a treatment device system and a treatment method for grinding wastewater reuse. Except that only a second filter membrane is provided in the filtering centrifugal device, other conditions are the same as those in Example 2.

[0110] Comparative Example 6

[0111] This comparative example provides a treatment device system and a treatment method for grinding wastewater reuse. Except that the treatment device system is not provided with a solar distillation device, other conditions are the same as those in Example 2.

[0112] The SS content, turbidity, copper scraps and alumina quality in the recycled water obtained by the treatment device system and treatment method provided in the above embodiments and comparative examples were tested, and the results are shown in Table 1. The SS content was tested by the membrane filter method, and the turbidity was tested by the colorimetric method.

[0113] Table 1

[0114]

[0115]

[0116] From Table 1, we can see that:

[0117] (1) The treatment device system and method provided in Examples 1-3 of the present invention can remove the abrasive and copper chips in the grinding wastewater by using a combination of a first separation device, a second separation device, a precipitation device, a solar distillation device and a sterilization device, and a multi-stage physical treatment method, and the obtained recycled water can meet the use standard of grinding water and has a high recovery rate; wherein the SS content of the recycled water is less than 0.5 mg / L and the turbidity is less than 0.5°;

[0118] (2) From the comparison between Example 1 and Examples 4-6, it can be seen that if the pore size of the first filter membrane is too small, although the effect is not much different from that of Example 1, the material will encounter greater resistance when passing through, resulting in a slower filtration speed, and the copper chips are easily blocked when separating, resulting in a reduced membrane life; if the pore size of the first filter membrane is too large, the pore size is larger than the copper chip particle size, resulting in poor separation effect of the copper chips; if the pore size of the second filter membrane is too large, the pore size is larger than the abrasive particle size, resulting in insufficient separation effect of the abrasive and wastewater;

[0119] (3) By comparing Example 1 with Examples 7-8 and Comparative Examples 4-5, it can be seen that if the first filter membrane and the second filter membrane are made of the same material or the second separation device is only provided with one filter membrane, it is impossible to separate the copper chips, abrasives and wastewater in one step due to the lack of selective separation and filtration;

[0120] (4) By comparing Example 1 with Comparative Example 1, it can be seen that if an aeration pipe is not provided in the grinding wastewater collection device, the waste grinding agent and copper chips cannot be suspended, thereby affecting the subsequent separation effect;

[0121] (5) It can be seen from the comparison between Example 1 and Comparative Example 3 that if the first separation device and the second separation device are swapped in the processing device system, the subsequent separation and filtration will be affected because the iron oxide particles are large and charged, and the iron oxide, copper chips, and aluminum oxide cannot be separated well;

[0122] (6) By comparing Example 1 with Comparative Example 6, it can be seen that if the treatment device system is not equipped with a solar distillation device, the solid content and turbidity in the recycled water exceed the standard, and the recycled water obtained does not meet the use standard of grinding water.

[0123] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. A grinding wastewater recycling treatment device system, characterized in that: The treatment device system includes a grinding wastewater collection device, a first separation device, a second separation device, a precipitation device, a solar distillation device and a sterilization device connected in sequence; The grinding wastewater collection device is provided with an aeration pipe; The first separation device includes a magnetic separation device; The first separation device is independently provided with a magnetic material outlet and a non-magnetic material outlet; the magnetic material outlet is connected to the abrasive collecting device; the non-magnetic material outlet is connected to the second separation device; The second separation device comprises a filtering centrifugal device, wherein the filtering centrifugal device is provided with a first filtering membrane and a second filtering membrane in sequence from top to bottom; The second separation device is independently provided with a first outlet, a second outlet and a third outlet; the first outlet is connected to a waste copper collecting device; the second outlet is connected to an abrasive collecting device; and the third outlet is connected to the precipitation device.

2. The processing device system according to claim 1, characterized in that: The aeration pipe is arranged in a coiled manner on the inner wall of the grinding wastewater collection device; Preferably, a plurality of self-closing holes are evenly formed on the wall of the aeration tube, and the self-closing holes automatically open when oxygen is supplied, and automatically close when oxygen supply ends; Preferably, the diameter of the self-closing foramen is 0.5-3 mm.

3. The processing device system according to claim 1 or 2, characterized in that: The pore size of the first filter membrane is 90-110 μm; Preferably, the first filter membrane comprises a polyamide membrane containing an antimicrobial agent; Preferably, the first filter membrane is used to separate copper chips from grinding wastewater.

4. The processing device system according to any one of claims 1 to 3, characterized in that: The pore size of the second filter membrane is 15-25 μm; Preferably, the second filter membrane comprises a polytetrafluoroethylene membrane containing an antimicrobial agent; Preferably, the second filter membrane is used to separate abrasive from wastewater.

5. The processing device system according to any one of claims 1 to 4, characterized in that: The sedimentation device comprises a conical sedimentation tank; Preferably, the solar distillation device comprises a distillation chamber, a condensation chamber and a water collection tank connected in sequence; Preferably, the water outlet of the precipitation device is connected to the distillation chamber; Preferably, a solar panel is provided on the top of the distillation chamber, and the solar panel is connected to the battery pack through a wire; Preferably, a sewage pipe is provided at the bottom of the distillation chamber; Preferably, the condensation chamber is connected to the water collecting tank via a distilled water outflow pipe; Preferably, the water collection tank is connected to the sterilization device.

6. The processing device system according to any one of claims 1 to 5, characterized in that: The sterilization device includes an ultraviolet sterilization device; Preferably, the sterilization device is connected to the filtering device and the grinding device in sequence.

7. The processing device system according to any one of claims 1 to 6, characterized in that: A first lifting pump is provided on the pipeline connecting the grinding wastewater collecting device and the first separating device; Preferably, a second lift pump is provided on the pipeline connecting the first separation device and the second separation device; Preferably, a third boost pump is provided on the pipeline connecting the precipitation device and the solar distillation device.

8. A method for recycling grinding wastewater, characterized in that: The processing method is carried out by using the processing device system according to any one of claims 1 to 7, and specifically comprises: (1) collecting the grinding wastewater into a grinding wastewater collection device and aerating it, then pumping the grinding wastewater into a first separation device for magnetic separation to obtain magnetic material and non-magnetic material, then pumping the non-magnetic material into a second separation device for filtration separation to obtain copper chips, abrasives and wastewater; (2) The wastewater obtained in step (1) is transported to a sedimentation device, and the precipitated wastewater is pumped into a solar distillation device for distillation to obtain distilled water and sludge. The obtained distilled water is sterilized in a sterilization device and then reused in the grinding device.

9. The processing method according to claim 8, characterized in that: The grinding wastewater in step (1) includes grinding wastewater from the heat dissipation cover; Preferably, the magnetic field strength of the magnetic separation in step (1) is 10000-16000 Gs; Preferably, the magnetic substance in step (1) comprises iron oxide; Preferably, the rotation speed of the filtering separation in step (1) is 4000-10000 rpm; Preferably, the abrasive in step (1) comprises aluminum oxide.

10. The processing method according to claim 8 or 9, characterized in that: Dewatering the sludge in step (2), and pumping the resulting wastewater into a solar distillation device; Preferably, the sterilization in step (2) is followed by filtration.

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