A post-treatment device for cutting medium special for titanium-magnesium-aluminum alloy

Abstract

This utility model relates to the technical field of cutting media treatment equipment, and more particularly to a post-treatment device for cutting media specifically designed for titanium-magnesium-aluminum alloys. It includes a mixing tank, a separation unit, a low-temperature distillation unit, a biological treatment unit, and a membrane filtration unit connected in sequence. A circulation unit is connected to the membrane filtration unit and the separation unit for backwashing them. The membrane filtration unit includes a membrane filtration assembly and a backwashing structure. The membrane filtration assembly is connected to the low-temperature distillation unit, and the backwashing structure is connected to the circulation unit for vibrating and rinsing the membrane filtration assembly. The purpose is to improve the quality of the wastewater from the waste cutting media by performing pre-treatment followed by comprehensive treatment.

Description

Technical Field

[0001] This utility model relates to the technical field of cutting media treatment equipment, and in particular to a post-treatment device for cutting media specifically for titanium-magnesium-aluminum alloys. Background Technology

[0002] In the machining of titanium-magnesium-aluminum alloys, the cutting media are generally cutting fluid, cutting oil, cleaning agents, etc. The cutting media can play a role in cooling, lubrication, chip removal and cleaning, rust prevention and corrosion prevention, thereby significantly improving machining efficiency, extending tool life and ensuring workpiece quality.

[0003] After a certain period of use, cutting media needs to be replaced with new ones. Because of the composition of cutting media, the COD of the discharged cutting media is relatively high, and it cannot be directly discharged; the waste liquid must be treated before discharge. Chinese patent CN219174371U discloses a comprehensive on-site waste liquid purification and treatment device, including a low-temperature distillation purification device body, a filter box, and a treatment box. In actual use, it was found that the quality of the effluent after the above treatment steps was not high, requiring further deep treatment to meet direct discharge or reuse standards, thus increasing the waste liquid treatment cost. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a post-treatment device for cutting media for titanium-magnesium-aluminum alloys. By performing pre-treatment on the used cutting media and then comprehensive treatment, the quality of the waste water from the waste cutting media can be improved.

[0005] This utility model solves the above-mentioned technical problems through the following technical means:

[0006] A post-treatment device for cutting media for titanium-magnesium-aluminum alloys includes a mixing tank, a separation unit, a low-temperature distillation unit, a biological treatment unit, and a membrane filtration unit connected in sequence. The membrane filtration unit and the separation unit are connected to a circulation unit for backwashing the membrane filtration unit and the separation unit. The membrane filtration unit includes a membrane filtration assembly and a backwashing structure. The membrane filtration assembly is connected to the low-temperature distillation unit, and the backwashing structure is connected to the circulation unit for vibrating and rinsing the membrane filtration assembly.

[0007] Furthermore, the membrane filtration assembly includes at least two membrane filtration structures, and the backwashing structure is arranged on two adjacent membrane filtration structures; the backwashing structure includes a flushing head, a transmission plate and an elastic element, the transmission plate is fixedly connected between two adjacent membrane filtration structures, the outlet of the flushing head corresponds to the transmission plate, and the elastic element is arranged on the membrane filtration structure.

[0008] Furthermore, the elastic element includes a first support member and a second support member, the first support member being arranged at the top of the membrane filtration structure and the second support member being arranged at the bottom of the membrane filtration structure.

[0009] Furthermore, the first support member includes a support block, a first guide rod, and a first spring. The support block has a groove, one end of the membrane filter structure is located in the groove, the first guide rod slides through the support block and the membrane filter structure located in the groove, and the first spring is sleeved on the first guide rod. One end of the first spring is connected to the bottom of the groove, and the other end is connected to the membrane filter structure.

[0010] Furthermore, the second support member includes a support frame, a second guide rod, and a second spring. The bottom of the membrane filtration structure is located on the support frame. The second guide rod slides through the support frame and the bottom of the membrane filtration structure. The second spring is sleeved on the second guide rod. One end of the second spring is connected to the support frame, and the other end is connected to the membrane filtration structure.

[0011] Furthermore, the separation unit includes a filter and an oil-water separator, with the filter arranged between the oil-water separator and the mixing tank.

[0012] Furthermore, the filter includes a first filter and a second filter, which are arranged sequentially.

[0013] Furthermore, the low-temperature distillation unit includes a vacuum chamber, a collection tank, a pH meter, and a dosing tank. The vacuum chamber is connected to the separation unit, the collection tank is connected to the vacuum chamber and is used to collect the concentrated liquid separated from the vacuum chamber, the pH meter is connected to the vacuum chamber and is used to test the pH of the solution entering the vacuum chamber, and the dosing tank is connected to the pH meter and the vacuum chamber.

[0014] Furthermore, the circulation unit includes a circulation pump, a circulation pipe, a branch pipe, a shut-off valve, a drain valve, and a flow valve. One end of the circulation pipe is connected to the outlet end of the membrane filter assembly, and the other end is connected to the separation unit. The circulation pump is located at the connection section between the membrane filter assembly and the circulation pipe. The branch pipe is connected to the circulation pipe and the membrane filter assembly. The shut-off valve is located between the oil-water separator and the filter. The drain valve is located between the filter and the flow valve.

[0015] Furthermore, a pressure valve is installed on the branch pipe.

[0016] The present application, employing the above-described scheme, has the following beneficial effects:

[0017] 1. In this application, through the cooperation of the mixing tank, separation unit, low-temperature distillation unit, biological treatment unit, and membrane filtration unit, the mixed waste liquid of the cutting media can first be separated from impurities, particles, and oil and water, and then subjected to low-temperature distillation to distill out most of the water. Most of the distilled water enters the biological treatment unit for biochemical treatment to reduce COD, BOD, etc. in the water. Finally, it is treated by membrane filtration to obtain tailwater that can be directly discharged or reused. 2. In this application, the tailwater after membrane filtration is used to backwash the membrane filtration unit and filter, which can reduce the fouling of the membrane filtration unit and filter, thereby extending the service life of the membrane filtration unit and filter. Attached Figure Description

[0018] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0019] Figure 1 This is a schematic diagram of the structure of a post-processing device for a special cutting medium for titanium-magnesium-aluminum alloys in an embodiment of this application;

[0020] Figure 2 This is one of the partial structural schematic diagrams of the membrane filtration assembly in the embodiments of this application;

[0021] Figure 3 This is the second partial structural schematic diagram of the membrane filtration assembly in the embodiments of this application;

[0022] The components include: 1. Mixing tank; 2. Filter; 21. First filter; 22. Second filter; 23. Drain valve; 24. Flow valve; 3. Shut-off valve; 4. Oil-water separator; 5. Vacuum tank; 51. Dosing tank; 52. Collection tank; 6. Biochemical tank; 7. Membrane filtration unit; 71. Water tank; 72. Membrane filtration structure; 721. Mounting frame; 722. Hollow fiber membrane; 73. Elastic component; 731. Support block; 732. First guide rod; 733. First spring; 734. Transmission plate; 735. Support frame; 736. Second guide rod; 737. Second spring; 74. Flushing head; 8. Circulation pipe; 81. Branch pipe. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the figures for those skilled in the art.

[0024] In the figures of this utility model embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing the present invention 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, the terms used to describe positional relationships in the figures are only for illustrative purposes and should not be construed as limiting the present utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. In the description of this application, terms such as "first", "second", etc. are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0026] like Figure 1-3 As shown in the embodiment of this application, a post-treatment device for cutting media specifically for titanium-magnesium-aluminum alloys is disclosed. It includes a mixing tank 1, a separation unit, a low-temperature distillation unit, a biological treatment unit, and a membrane filtration unit 7, which are sequentially connected by pipelines. The device first separates impurities, particles, and oil from the mixed waste liquid of the cutting media. Then, it performs low-temperature distillation to remove most of the water. Most of the distilled water enters the biological treatment unit for biochemical treatment to reduce COD, BOD, etc., and finally, it undergoes membrane filtration to obtain tailwater that can be directly discharged or reused.

[0027] In this embodiment, the mixing tank 1 is used to receive the waste fluid from the cutting media after the titanium-magnesium-aluminum alloy has been processed by the cutting media. The waste fluid from the cutting media includes one or more waste fluids such as cutting fluid, cutting oil, and cleaning agents.

[0028] In this embodiment, the separation unit includes a first filter 212, a second filter 222, and an oil-water separator 4. Both the first filter 212 and the second filter 222 are Y-shaped filters arranged on the pipeline to filter impurity particles in the cutting media waste liquid, such as debris and silt generated during the processing of titanium-magnesium-aluminum alloys. The pore size of the Y-shaped filter screen is 50-500 μm, and a suitable mesh size can be selected according to actual conditions. In practice, a timed drain valve 23 can also be installed at the drain port of the Y-shaped filter, allowing the Y-shaped filter to open the drain valve 23 periodically to discharge impurities and reduce filter screen clogging.

[0029] The oil-water separator 4 is located after the second Y-shaped filter, allowing the cutting media waste liquid to pass through the oil-water separator 4 for oil-water separation after filtration. This separation removes floating oil from the waste liquid, allowing the wastewater to enter the low-temperature distillation unit. The floating oil, on the other hand, flows through an external pipe connected to the oil-water separator 4 into a dedicated floating oil collection tank.

[0030] In this embodiment, the low-temperature distillation unit includes a vacuum chamber 5, a collection tank 52, a pH meter, and a dosing tank 51. The vacuum chamber 5 is connected to the oil-water separator 4 via a pipeline. The collection tank 52 is also connected to the vacuum chamber 5 and is used to collect the concentrated liquid separated by the vacuum chamber 5. The pH meter is connected to the vacuum chamber 5 and is used to test the pH of the solution entering the vacuum chamber 5. The dosing tank 51 is connected to both the pH meter and the vacuum chamber 5. When wastewater from the oil-water separator 4 enters the vacuum chamber 5, the pH of the wastewater is tested by the pH meter. Based on the pH value, the dosing tank 51 adds appropriate reagents to the vacuum chamber 5 to adjust the pH of the wastewater to 6-8, reducing corrosion of the vacuum chamber 5.

[0031] In this embodiment, the vacuum chamber 5 is a mature vacuum device in the prior art, possessing functions such as heating, evaporation, condensation recovery, and concentrate separation. Through the operation of the vacuum chamber 5, the wastewater after evaporation and condensation recovery is transported to the biological treatment unit via pipeline. The concentrate is discharged into the collection tank 52 for subsequent centralized treatment.

[0032] In this embodiment, both the pH meter and the dosing tank 51 are existing technologies, and they are controlled by a control unit, such as a PLC controller, along with the vacuum chamber 5.

[0033] In this embodiment, the biological treatment unit includes a biochemical tank 6 and a microbial addition device. The biochemical tank 6 is connected to the vacuum box 5 through a pipeline. Wastewater is transported to the biochemical tank 6, and then microorganisms are added to the biochemical tank 6 through the microbial addition device for biodegradation. The organic and inorganic substances in the wastewater are converted into substances such as carbon dioxide, water, and nitrogen, thereby reducing COD and BOD in the wastewater.

[0034] In this embodiment, the microbial addition device has the function of timed and quantitative addition, which can be achieved by using a PLC controller, timer and meter in combination with existing technology. Alternatively, a suitable control device can be selected according to the actual situation.

[0035] In this embodiment, as Figure 2-3 As shown, the membrane filtration unit 7 includes a membrane filtration assembly and a backwashing structure. The membrane filtration assembly is connected to the biochemical tank 6, and the backwashing structure is arranged on the membrane filtration assembly to vibrate and rinse the membrane filtration assembly.

[0036] In this embodiment, the membrane filtration assembly includes at least two membrane filtration structures 72. This embodiment uses two identical membrane filtration structures 72 as an example. A backwashing structure is arranged on two adjacent membrane filtration structures 72. When water flow impacts the membrane filtration structures, the backwashing structure drives the membrane filtration structures 72 to vibrate and flush, thereby reducing the fouling of the membrane filter 2 and extending its service life.

[0037] In this embodiment, the membrane filtration structure 72 includes two hollow mounting brackets 721, a hollow fiber membrane 722, and a water tank 71. The use of hollow mounting brackets 721 reduces weight and facilitates the discharge of filtered wastewater. The hollow fiber membrane 722 is fixedly installed between the two hollow mounting brackets 721. A connector is provided on the bottom mounting bracket 721, extending through a pipe out of the water tank 71 for discharging the membrane-filtered wastewater. The water tank 71 has an inlet for connecting to the biochemical tank 6 via a pipe, allowing wastewater to enter the water tank 71.

[0038] In this embodiment, the membrane filtration structure 72 with hollow fiber membrane 722 is a small industrial device with a weight in the range of 1-5 kg.

[0039] In this embodiment, backwashing structures are evenly arranged between every two adjacent mounting brackets 721, and to maintain the balance of the membrane filtration structure 72 during impact, backwashing structures are also arranged at both ends of every two adjacent mounting brackets 721. Each backwashing structure has the same structure; one will be described as an example below:

[0040] The backwashing structure includes a flushing head 74, a drive plate 734, and an elastic element 73. The drive plate 734 is fixedly connected between the mounting brackets 721 on the upper sides of two adjacent membrane filtration structures 72. The outlet of the flushing head 74 corresponds to the drive plate 734. The flushing head 74 is connected to the circulation unit through a pipe, allowing the effluent after membrane filtration to impact the drive plate 734. The elastic element 73 is arranged on the mounting bracket 721, making it easier for the membrane filtration structure 72 to vibrate up and down when the flushing head 74 impacts the drive plate 734, thereby reducing the clogging of the hollow fiber membrane 722.

[0041] In this embodiment, the elastic member 73 includes a first support member and a second support member. The first support member is arranged at the upper mounting bracket 721, and the second support member is arranged at the lower mounting bracket 721, for enabling the membrane filter structure 72 to vibrate up and down effectively.

[0042] Specifically, the first support member includes a support block 731, a first guide rod 732, and a first spring 733. The support block 731 is fixedly connected to the water tank 71 by bolts. A groove is provided on the support block 731, and one end of the upper mounting bracket 721 is located in the groove. The first guide rod 732 slides through the support block 731 and the mounting bracket 721 located in the groove. The first spring 733 is sleeved on the first guide rod 732. One end of the first spring 733 is connected to the bottom of the groove, and the other end is connected to the mounting bracket 721, so that the upper mounting bracket 721 has space to move up and down along the first guide rod 732.

[0043] The upper and lower ends of the first guide rod 732 are connected to the support block 731 through nuts, thereby fixing the first guide rod 732 to the support block 731.

[0044] Specifically, the second support includes a support frame 735, a second guide rod 736, and a second spring 737. The support frame 735 is bolted to the bottom of the water tank 71. A mounting bracket 721 located on the lower side is situated on the support frame 735. The second guide rod 736 slides through the support frame 735 and the mounting bracket 721 located on the lower side. The second spring 737 is sleeved on the second guide rod 736. One end of the second spring 737 is connected to the support frame 735, and the other end is connected to the mounting bracket 721 located on the lower side, allowing the mounting bracket 721 to move up and down along the second guide rod 736.

[0045] The bottom of the second guide rod 736 is connected to the bottom of the water tank 71 by a screw sleeve, and a nut is also screwed onto the top to fix the position of the second guide rod 736.

[0046] In this embodiment, the liquid level in the water tank 71 is lower than the position of the transmission plate 734, and the distance between the two is ≥10-15 cm, preferably 12 cm. This allows the membrane filter structure 72 to effectively slosh with the water in the water tank 71 when it vibrates up and down, creating a moving impact, which makes the blockage of the hollow fiber membrane 722 more effective.

[0047] In this embodiment, the circulation unit includes a circulation pump, a circulation pipe 8, a branch pipe 81, a shut-off valve 3, a drain valve 23, and a flow valve 24. One end of the circulation pipe 8 is connected to the outlet end of the membrane filter assembly, i.e., the outlet end of the hollow fiber membrane 722 extends through a pipe to the water tank 71 and then connects to the circulation pipe 8. The other end is connected to the pipe between the oil-water separator 4 and the second Y-shaped filter. The circulation pump is located at the connection section between the outlet end of the membrane filter assembly and the circulation pipe 8, and is used to pump the effluent after membrane filtration into the circulation pipe 8. The shut-off valve 3 is located between the oil-water separator 4 and the filter, and the drain valve 23 is located between the filter and the flow valve 24, so that after the effluent is pumped out, it can be used to backwash the two Y-shaped filters, and the wastewater after backwashing is discharged from the drain valve 23. A first pressure valve is installed on the connection section of the circulation pipe 8 to the second Y-shaped filter, which is used to control the impact pressure of the effluent.

[0048] A flow valve 24 is installed on the pipeline between the first Y-shaped filter and the mixing tank 1 to control the outflow of wastewater from the mixing tank 1. A water pump is installed inside the mixing tank 1 to pump the wastewater from the mixing tank 1 into the pipeline.

[0049] Branch pipe 81 connects to circulation pipe 8 and membrane filter assembly. Branch pipe 81 is connected to flushing head 74 via a pipe, allowing the circulating tailwater to impact transmission plate 734 through flushing head 74. A second pressure valve is installed on branch pipe 81 to control the impact pressure of the tailwater, preventing excessive or insufficient impact pressure. Both the first and second pressure valves are existing technologies, allowing for free adjustment of the tailwater flow pressure through branch pipe 81; examples include butterfly valves, adjustable pressure reducing valves, and electric valves.

[0050] In this embodiment, each electrical component or valve can be controlled by a central controller, such as a microcomputer or PLC controller.

[0051] In this embodiment, the wastewater in the mixing tank 1 is pumped out by a water pump, filtered by two Y-shaped filters 2 to remove impurities, particles, silt, etc., and then separated by an oil-water separator 4. After evaporation by a low-temperature distillation unit, more than 95% water in the wastewater is obtained. Then, through biological treatment and membrane filtration, high-quality tailwater is obtained.

[0052] When vibration of the membrane filter is required, open the circulation pump and the second pressure valve on the branch pipe 81 to impact the transmission plate 734, causing the membrane filter structure 72 to vibrate up and down in the water to clear blockages. This cleaning process can also be performed simultaneously while the membrane filter is operating. When flushing of the Y-type filter is required, open the circulation pump and the first pressure valve, and close the shut-off valve 3 and the flow valve 24 to clean the filter screen of the Y-type filter.

[0053] The above provides a detailed description of a post-processing device for a special cutting medium for titanium-magnesium-aluminum alloys. The specific embodiments described are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

[0054] It should be noted that the terms "one embodiment," "embodiment," "some alternative embodiments," "exemplary embodiments," and "some embodiments" used in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0055] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. A post-treatment device for cutting media dedicated to titanium-magnesium-aluminum alloys, characterized by the fact that it comprises: The system includes a mixing tank (1), a separation unit, a low-temperature distillation unit, a biological treatment unit, and a membrane filtration unit (7) connected in sequence. The membrane filtration unit (7) and the separation unit are connected to a circulation unit for backwashing the membrane filtration unit (7) and the separation unit. The membrane filtration unit (7) includes a membrane filtration assembly and a backwashing structure. The membrane filtration assembly is connected to the low-temperature distillation unit, and the backwashing structure is connected to the circulation unit for vibrating and rinsing the membrane filtration assembly.

2. The post-processing device for the special cutting medium for titanium-magnesium-aluminum alloys according to claim 1, characterized in that: The membrane filtration assembly includes at least two membrane filtration structures (72), and the backwashing structure is arranged on two adjacent membrane filtration structures (72); The backwashing structure includes a flushing head (74), a transmission plate (734), and an elastic element (73). The transmission plate (734) is fixedly connected between two adjacent membrane filtration structures (72). The outlet of the flushing head (74) corresponds to the transmission plate (734). The elastic element (73) is arranged on the membrane filtration structure (72).

3. The post-processing device for the special cutting medium for titanium-magnesium-aluminum alloys according to claim 2, characterized in that: The elastic element (73) includes a first support and a second support, the first support being arranged at the top of the membrane filtration structure (72) and the second support being arranged at the bottom of the membrane filtration structure (72).

4. The post-processing device for the special cutting medium for titanium-magnesium-aluminum alloys according to claim 3, characterized in that: The first support member includes a support block (731), a first guide rod (732), and a first spring (733). The support block (731) has a groove, and one end of the membrane filter structure (72) is located in the groove. The first guide rod (732) slides through the support block (731) and the membrane filter structure (72) located in the groove. The first spring (733) is sleeved on the first guide rod (732). One end of the first spring (733) is connected to the bottom of the groove, and the other end is connected to the membrane filter structure (72).

5. The post-processing device for the special cutting medium for titanium-magnesium-aluminum alloys according to claim 3 or 4, characterized in that: The second support includes a support frame (735), a second guide rod (736), and a second spring (737). The bottom of the membrane filter structure (72) is located on the support frame (735). The second guide rod (736) slides through the support frame (735) and the bottom of the membrane filter structure (72). The second spring (737) is sleeved on the second guide rod (736). One end of the second spring (737) is connected to the support frame (735), and the other end is connected to the membrane filter structure (72).

6. The post-processing device for the special cutting medium for titanium-magnesium-aluminum alloys according to claim 1, characterized in that: The separation unit includes a filter (2) and an oil-water separator (4), with the filter (2) arranged between the oil-water separator (4) and the mixing tank (1).

7. The post-processing device for the special cutting medium for titanium-magnesium-aluminum alloys according to claim 6, characterized in that: The filter (2) includes a first filter (21) and a second filter (22), which are arranged sequentially.

8. The post-processing device for the special cutting medium for titanium-magnesium-aluminum alloys according to claim 1, characterized in that: The low-temperature distillation unit includes a vacuum chamber (5), a collection tank (52), a pH meter, and a dosing tank (51). The vacuum chamber (5) is connected to the separation unit, the collection tank (52) is connected to the vacuum chamber (5) and is used to collect the concentrated liquid separated from the vacuum chamber (5), the pH meter is connected to the vacuum chamber (5) and is used to test the pH of the solution entering the vacuum chamber (5), and the dosing tank (51) is connected to the pH meter and the vacuum chamber (5).

9. The post-processing device for the special cutting medium for titanium-magnesium-aluminum alloys according to claim 6, characterized in that: The circulation unit includes a circulation pump, a circulation pipe (8), a branch pipe (81), a shut-off valve (3), a drain valve (23), and a flow valve (24). One end of the circulation pipe (8) is connected to the outlet end of the membrane filter assembly, and the other end is connected to the separation unit. The circulation pump is located at the connection section between the membrane filter assembly and the circulation pipe (8). The branch pipe (81) is connected between the circulation pipe (8) and the membrane filter assembly. The shut-off valve (3) is located between the oil-water separator (4) and the filter (2). The drain valve (23) is located between the filter (2) and the flow valve (24).

10. The post-processing device for the special cutting medium for titanium-magnesium-aluminum alloys according to claim 9, characterized in that: A pressure valve is installed on the branch pipe (81).

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