Machining oil-containing wastewater treatment system

Abstract

The utility model discloses a machining oily wastewater treatment system relates to wastewater circulation technical field, including filter tube, and the lower side of filter tube is fixed with support frame, and the filter tube bottom surface middle part is connected through the filter tube inner chamber installation has the water outlet pipe, and the filter tube is installed with initial filtration subassembly, and the collection box is installed with the osmotic pressure filtration circulation subassembly between the reaction kettle, the utility model discloses device fusion osmotic pressure filtration circulation subassembly's mutual cooperation, realizes the depth treatment of oily wastewater and resource circulation, the wastewater in collection box passes through the filter box positive osmosis membrane, and the cooperation high concentration extract liquid's osmotic pressure adsorbs water, and intercepts the waste chip and residual oil dirt, satisfies the depth oil removal dehydration demand, the reaction kettle heating block cooperates with the vacuum pump of top cap, reduces the water content boiling point in extract liquid to save energy, and the evaporation water is recycled as clean water through the steam collecting pipe, can be used for machining cooling secondly, reduces water resource waste.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater recycling equipment, and in particular to a system for treating oily wastewater from machining. Background Technology

[0002] During the machining process, a large amount of oily wastewater containing oil, metal scraps and suspended solids is generated. If such wastewater is discharged directly without effective treatment, it will easily cause environmental pollution. Moreover, the water resources and recyclable components in the wastewater are not used rationally, which is not in line with the concept of resource recycling. Current technologies for treating oily wastewater from machining generally suffer from poor deep treatment effects, failing to effectively remove fine debris and residual oil from the wastewater. This results in treated wastewater that cannot meet subsequent reuse or discharge standards. Furthermore, existing treatment systems lack resource recycling designs, with much of the water generated during treatment being directly discharged, leading to significant water waste. The extracts used to absorb water are mostly single-use and cannot be recycled, significantly increasing treatment costs and consumable consumption. In addition, existing systems for concentration or dehydration rely heavily on single heating methods when separating water from the extract, without effective measures to lower the boiling point of water, resulting in excessive energy consumption and failing to meet energy-saving requirements. Wastewater collection components are prone to blockage due to the accumulation of debris and oil, and lack convenient cleaning mechanisms, requiring frequent disassembly for maintenance, impacting treatment efficiency. Moreover, insufficient sealing at pipe interfaces leads to oily wastewater leakage during treatment, which can corrode equipment components, pollute the workshop environment, increase equipment maintenance costs, and raise environmental risks. Therefore, these problems need to be addressed. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a machining oily wastewater treatment system.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a machining oily wastewater treatment system, including a filter pipe, a support frame fixedly connected to the lower outer side of the filter pipe, and an outlet pipe installed in the middle of the bottom surface of the filter pipe, connecting to the inner cavity of the filter pipe; a flange fixedly connected to the other end of the outlet pipe, and a collection box with support platforms fixedly connected to the four corners of the bottom surface of the filter pipe installed on one side; a cleaning pipe connected to the inner cavity of the collection box installed on the other side below the collection box, and a feed pipe connected to the middle of the top surface of the collection box; a first circulation pipe connected to the inner cavity of the collection box installed on one side of the feed pipe; flanges fixedly connected to the other ends of the cleaning pipe, the feed pipe, and the first circulation pipe; a connecting pipe connected to the lower part of the outlet pipe via the flange; the other end of the connecting pipe connected to the feed pipe via the flange; a reaction vessel installed on one side of the collection box; an initial filtration assembly installed inside the filter pipe; and an osmotic pressure filtration circulation assembly installed between the collection box and the reaction vessel.

[0005] Preferably, the top surface of the reactor is connected to a top cover via a flange, and a protective cover is installed in the middle of the outer side of the reactor. Multiple heating blocks are installed at equal intervals above and below the protective cover and the reactor. A connecting hole is opened in the middle of the top surface of the top cover, which communicates with the inner cavity of the reactor. A vacuum pump that matches the connecting hole is installed on the top surface of the top cover. A steam collection pipe that penetrates the top cover and communicates with the inner cavity of the reactor is installed on one side of the connecting hole, and a collection pipe that penetrates the top cover and communicates with the inner cavity of the reactor is installed on the other side of the connecting hole.

[0006] Preferably, the osmotic pressure filtration circulation assembly includes a second circulation pipe installed at the lower front end of one side of the collection tank, a first electronic valve connected to the other side of the second circulation pipe via a flange, a first connecting pipe connected to the other end of the first electronic valve via a flange, a first impeller pump connected to the other end of the first connecting pipe via a flange, a second connecting pipe connected to the other end of the first impeller pump via a flange, and a collection pipe connected to the other end of the second connecting pipe via a flange.

[0007] Preferably, a discharge pipe is installed in the lower rear end of the reactor, which is connected to the inner cavity. The other end of the discharge pipe is connected to a second electronic valve via a flange. The other end of the second electronic valve is connected to a third connecting pipe via a flange. The other end of the third connecting pipe is connected to a second impeller pump via a flange. The other end of the second impeller pump is connected to a fourth connecting pipe via a flange. The other end of the fourth connecting pipe is connected to a first circulation pipe via a flange.

[0008] Preferably, a filter box with a double-layer multi-mesh structure is installed at the lower end of the first circulation pipe. The two layers of the filter box form a placement cavity, and a forward osmosis membrane is installed in the placement cavity. The first circulation pipe passes through the filter box from the bottom and the other side of the second circulation pipe and is placed inside the filter box cavity. A liquid level sensor is vertically installed at the rear end of the top surface of the other side of the collection box, and an air supply pipe is vertically installed at the front end of the top surface of the other side of the collection box. Both the liquid level sensor and the air supply pipe pass through the top surface of the collection box and are placed inside the collection box cavity.

[0009] Preferably, the initial filtration assembly includes a positioning tube vertically installed inside the filter tube and connected to the outlet pipe. A first threaded groove is formed on the upper part of the inner wall of the filter tube. A barrier tube is vertically installed on the outer side of the positioning tube. The bottom surface of the barrier tube is fixed to the inner bottom surface of the filter tube, and the vertical height of the barrier tube is higher than that of the positioning tube. The top surface of the barrier tube is lower than that of the filter tube, and a second threaded groove is formed on the upper part of the inner wall of the barrier tube. Multiple guide grooves are equidistantly formed on the bottom surface of the barrier tube. A first protective platform is threadedly connected between the filter tube and the barrier tube through the first threaded groove. A wastewater inlet pipe is installed through the middle of the top surface of the first protective platform. A first superhydrophilic filter screen is installed on the bottom surface of the first protective platform. A second protective platform is threadedly connected between the positioning tube and the barrier tube through the second threaded groove. A second superhydrophilic filter screen is installed on the bottom surface of the second protective platform.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model device integrates the cooperation of osmotic pressure filtration and circulation components to achieve deep treatment and resource recycling of oily wastewater. Wastewater in the collection tank passes through the forward osmosis membrane of the filter box, where the high-concentration extract adsorbs water under osmotic pressure, while retaining waste debris and residual oil, meeting the requirements for deep oil removal and dehydration. The heating block of the reactor and the vacuum pump on the top cover work together to lower the boiling point of water in the extract to save energy. The evaporated water is recovered as clean water through the steam collection pipe and can be reused for machining cooling, reducing water waste. The extract with adsorbed water is pumped into the reactor for regeneration through the first pump, the second circulation pipe, and the first electronic valve. The second pump, the first circulation pipe, and the second electronic valve send the regenerated extract back to the filter box for circulation. The cleaning pipe facilitates cleaning the sediment in the collection box to prevent clogging. Flange connections seal all pipe interfaces to prevent oily wastewater leakage from corroding equipment or polluting the workshop, improving system processing efficiency and resource utilization, and avoiding the environmental hazards of direct wastewater discharge.

[0011] 2. This utility model achieves preliminary filtration and stable operation of oily wastewater from machining through the cooperation of initial filtration components. It not only filters larger oil droplets and significant suspended solids through a double-layer interception of the first and second superhydrophilic filters during the wastewater entry stage, completing preliminary impurity removal without complex pretreatment and shortening the subsequent treatment cycle, but also prevents wastewater backflow from affecting the filtration effect through the unidirectional flow design of the positioning and blocking pipes. The support frame fixes the filter pipes, and the support platform stabilizes the collection box, offsetting minor vibrations during equipment operation and preventing component displacement. During filter maintenance, the filter screens can be quickly disassembled and replaced through the threaded connection of the first threaded groove of the filter pipe and the second threaded groove of the blocking pipe, without the need for complete equipment disassembly. The air supply pipe, in conjunction with an external air pump, supplies air to the wastewater in the collection box to agitate it, accelerating osmotic pressure filtration efficiency. A liquid level sensor monitors the liquid level in real time to prevent overflow. All components are connected by flanges and bolts, reducing the need for additional fasteners and meeting the needs of machining workshops for stable and easy-to-maintain wastewater treatment equipment. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with their description, serve to explain the present invention, but do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure proposed in this utility model; Figure 2 This is a half-sectional schematic diagram of the overall structure proposed in this utility model; Figure 3 This is a schematic diagram of the gas supply pipe structure proposed in this utility model; Figure 4 The present utility model proposes Figure 2 Enlarged diagram of part A in the middle; Figure 5 The present utility model proposes Figure 2 Enlarged diagram of section B; Figure 6 The present utility model proposes Figure 2 Enlarged diagram of section C.

[0013] The following are the components listed in the diagram: 1. Filter tube; 2. Support frame; 3. Collection box; 4. Cleaning tube; 5. Feed tube; 6. First circulation tube; 7. Connecting tube; 8. Reactor; 9. Top cover; 10. Protective cover; 11. Heating block; 12. Vacuum pump; 13. Steam collection tube; 14. Filter collection tube; 15. Second circulation tube; 16. Discharge tube; 17. First electronic valve; 18. First pump; 19. Second electronic valve; 20. Second pump; 21. Filter box; 22. Placement cavity; 23. Forward osmosis membrane; 24. Liquid level sensor; 25. Gas supply tube; 26. Positioning tube; 27. Barrier tube; 28. Second superhydrophilic filter; 29. ​​First superhydrophilic filter. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Example: See Figures 1 to 6The machining oily wastewater treatment system of this utility model includes a filter pipe 1. The filter pipe 1 is threaded to a first superhydrophilic filter 29 via a first threaded groove on its inner wall. It also works with a positioning pipe 26, a barrier pipe 27, and a second superhydrophilic filter 28 to perform unidirectional multi-layer filtration of the initial wastewater. A support frame 2 is fixedly attached to the lower outer side of the filter pipe 1, allowing for external bolt connection to ensure the stability of the filter pipe 1. An outlet pipe is installed in the middle of the bottom surface of the filter pipe 1, connecting to its inner cavity. A flange is fixedly attached to the other end of the outlet pipe. A collection box 3, with support platforms fixed to each of the four corners of the bottom surface, is installed on one side of the filter pipe 1. The collection box 3 facilitates the collection of wastewater after the initial filtration by the filter pipe 1. A support frame 2 is installed on the other side below the collection box 3. A cleaning pipe 4 is installed, connecting to the inner cavity of the collection box 3. This cleaning pipe 4 facilitates the removal of residual substances deposited in the collection box 3 at the end of filtration or maintenance periods. The cleaning pipe 4 is connected to the external closing plate via a flange and bolts. A feed pipe 5 is installed in the center of the top surface of the collection box 3. The feed pipe 5 facilitates the connection of a connecting pipe 7 via a flange and external bolts, guiding the wastewater filtered by the filter pipe 1 into the collection box 3. A first circulation pipe 6, connecting to the inner cavity of the collection box 3, is installed on one side of the feed pipe 5. This first circulation pipe 6 facilitates the re-entry into the filter box 21 after the high-concentration extract has been restored to its original concentration. The cleaning pipe 4, feed pipe 5, and first circulation pipe 6 are separately connected. One end of each pipe is fixed with a flange, and a connecting pipe 7 is connected to the lower part of the outlet pipe via the flange. The connecting pipe 7 facilitates the construction of a "bridge" connecting the filter pipe 1 and the collection box 3. The other end of the connecting pipe 7 is connected to the feed pipe 5 via a flange. A reaction vessel 8 is installed on one side of the collection box 3. The reaction vessel 8 facilitates the connection of the top cover 9 via a flange and external bolts, as well as the installation of an external temperature sensor, and facilitates the subsequent dehydration treatment of the extract containing adsorbed water. An initial filtration assembly is installed inside the filter pipe 1, and an osmotic pressure filtration circulation assembly is installed between the collection box 3 and the reaction vessel 8. The top surface of the reaction vessel 8 is connected to the top cover 9 via a flange. The top cover 9 facilitates the installation of the steam collection pipe 13 and the filter collection pipe 14 via welding. The middle of the outer side of the reaction vessel 8... A protective cover 10 is installed, which facilitates the connection of heating blocks 11 to the reactor 8 via external snap-fit ​​components to raise the temperature. When installing the protective cover 10, external heat insulation cotton or other heat insulation materials should be used to adhere it to the inner wall. Multiple heating blocks 11 are installed at equal intervals above and below the protective cover 10 and the reactor 8, which facilitates the control of the reaction temperature inside the reactor 8. A connecting hole is opened in the middle of the top surface of the top cover 9, which connects to the inner cavity of the reactor 8. A vacuum pump 12 is installed on the top surface of the top cover 9 to match the connecting hole. The vacuum pump 12 facilitates the extraction of air from the reactor 8, reduces the boiling point of water pumped into the reactor 8 and adhering to the solute in the extract, and reduces energy consumption. The extraction rate of the vacuum pump 12 should be greater than the external air intake rate.A steam collection pipe 13 is installed on one side of the connecting hole, penetrating the top cover 9 and communicating with the inner cavity of the reactor 8. The steam collection pipe 13 facilitates connection to an external water source collection pipe via a flange and bolts, allowing clean distilled water to be retained in an external water source collection tank. A filter collection pipe 14 is installed on the other side of the connecting hole, penetrating the top cover 9 and communicating with the inner cavity of the reactor 8. The filter collection pipe 14 facilitates the guidance of the extract pumped in by the first pump 18, allowing the extract to enter the reactor 8. The osmotic pressure filtration circulation assembly includes a second circulation pipe 15 installed at the lower front end of one side of the collection tank 3, through which... The circulation pipe 15 facilitates connection to the filter box 21 and, in conjunction with the first pump 18, pumps the extract containing water through the second circulation pipe 15. The other side of the second circulation pipe 15 is connected to a first electronic valve 17 via a flange. The first electronic valve 17, the first pump 18, the first connecting pipe, the second connecting pipe, the filter collection pipe 14, and the second circulation pipe 15 form a "first bridge" between the reactor 8 and the filter box 21. The first electronic valve 17 also facilitates the opening and closing of this "first bridge" between the filter box 21 and the reactor 8. The other end of the first electronic valve 17 is connected to a first connecting pipe via a flange. One end of a connecting pipe is connected to a first-stage pump 18 via a flange. The other end of the first-stage pump 18 is connected to a second connecting pipe via a flange. The other end of the second connecting pipe is connected to a filter collection pipe 14 via a flange. The first-stage pump 18 facilitates the pumping of the extract in the filter box 21 into the reactor 8. A discharge pipe 16 is installed below the rear end of the reactor 8, connecting to the inner cavity. The discharge pipe 16 facilitates the subsequent pumping of the extract, which has been restored to a high concentration, back into the collection box 3 in conjunction with the second-stage pump 20. The other end of the discharge pipe 16 is connected to a second electronic valve 19 via a flange. The other end of the second electronic valve 19 is connected to a third electronic valve via a flange. The connecting pipe, via the second electronic valve 19, the second pump 20, the third connecting pipe, the fourth connecting pipe, the discharge pipe 16, and the first circulation pipe 6, forms a "second bridge" between the reactor 8 and the filter box 21. The second electronic valve 19 facilitates the opening and closing of this "second bridge" between the reactor 8 and the collection box 3. The other end of the third connecting pipe is connected to the second pump 20 via a flange. The other end of the second pump 20 is connected to the fourth connecting pipe via a flange. The other end of the fourth connecting pipe is connected to the first circulation pipe 6 via a flange. The second pump 20 facilitates the return of the extract from the reactor 8 to the filter box 21.

[0016] In this invention, a filter box 21 with a double-layered, multi-mesh structure is installed at the lower end of the first circulation pipe 6. The two layers of the filter box 21 form a placement cavity 22, which facilitates the installation and protection of the forward osmosis membrane 23 within the placement cavity 22. The forward osmosis membrane 23 is installed inside the placement cavity 22, allowing for the adsorption of water and filtration of waste debris in the wastewater within the collection box 3, utilizing the high-concentration extract and osmotic pressure principle. The filter box 21 is penetrated from the lower part of the first circulation pipe 6 and the other side of the second circulation pipe 15, and is placed within the cavity of the filter box 21. The other side of the collection box 3 is topped... A liquid level sensor 24 is vertically installed at the rear end of the collection tank 3 to facilitate the detection of the liquid level inside the collection tank 3. The model of the liquid level sensor 24 is LF-CZSS. An air supply pipe 25 is vertically installed at the front end of the top surface of the collection tank 3 on the other side. Both the liquid level sensor 24 and the air supply pipe 25 penetrate the top surface of the collection tank 3 and are located inside the collection tank 3. The air supply pipe 25 facilitates connection to an external air pump to provide gas to the collection tank 3, allowing the wastewater to agitate and accelerating the filtration efficiency. The initial filtration assembly includes a filter pipe 1 vertically installed inside the filter pipe 1 and connected to the outlet water. The positioning tube 26 has a first threaded groove on the upper part of the inner wall of the filter tube 1. A barrier tube 27 is vertically installed on the outer side of the positioning tube 26. The bottom surface of the barrier tube 27 is fixed to the inner bottom surface of the filter tube 1, and the vertical height of the barrier tube 27 is higher than that of the positioning tube 26. The positioning tube 26 facilitates the coordination with the second protective platform and the barrier tube 27 to affect the unidirectional flow of wastewater. The top surface of the barrier tube 27 is lower than the top surface of the filter tube 1, and a second threaded groove is opened on the upper part of the inner wall of the barrier tube 27. Multiple guide grooves are equally spaced on the bottom surface of the barrier tube 27, and the filter tube 1 and the barrier tube 27 are connected by threads through the first threaded groove. A first protective platform is connected to the first protective platform. A wastewater inlet pipe is installed through the middle of the top surface of the first protective platform, and a first superhydrophilic filter 29 is installed on the bottom surface of the first protective platform. The positioning pipe 26 and the barrier pipe 27 are connected to the second protective platform through a second threaded groove. A second superhydrophilic filter 28 is installed on the bottom surface of the second protective platform. The first superhydrophilic filter 29 and the second superhydrophilic filter 28 facilitate the filtration of larger oil droplets and obvious suspended solids in the initial wastewater. The first superhydrophilic filter 29 and the second superhydrophilic filter 28 are easy to replace through the first threaded groove and the second threaded groove.

[0017] Working principle: When using this utility model, the operator will sequentially connect the unopened first superhydrophilic filter 29 and the second superhydrophilic filter 28 with the positioning pipe 26 as the center through the first threaded groove opened by the filter tube 1 fixed by the support frame 2 and the second threaded groove opened by the barrier tube 27. Then, connect the external unified sewage pipe to the first protective platform fixed to the first superhydrophilic filter 29, connect the external air pump to the air supply pipe 25, and connect the cleaning pipe 4 and the steam collection pipe 13 to the external water source collection pipe through the flange and bolt sealing. Then check whether the sealing parts between each component and the extract in the filter box 21 are normal. Then the operator will turn on the power to the equipment. After the equipment is powered on, the wastewater generated by the external equipment's production process enters the first superhydrophilic filter 29 through the wastewater pipe. It then flows from the top to the bottom of the first superhydrophilic filter 29, passes through the guide groove in the barrier pipe 27, and flows from the bottom to the top of the second superhydrophilic filter 28. Guided by the positioning pipe 26, it flows from the connecting pipe 7 through the feed pipe 5 into the collection tank 3. The liquid level sensor 24 checks the liquid level in the collection tank 3, and the air supply pipe 25 provides external gas to the wastewater in the collection tank 3, causing external bubbles to "boil" the liquid, thus agitating it. When wastewater comes into contact with the extract placed in the filter box 21 through the forward osmosis membrane 23 installed in the placement cavity 22, because the solubility of the extract is higher than that of the wastewater, water molecules in the wastewater will permeate into the extract through the forward osmosis membrane 23. At the same time, the first electronic valve 17 and the second electronic valve 19, the first pump 18 and the second pump 20 are opened, and the heating block 11 between the reaction vessel 8 and the protective cover 10 and the vacuum pump 12 in the middle of the top cover 9 are started. The vacuum pump 12 extracts the air in the reaction vessel 8 to lower the boiling point of the water adhering to the extract that subsequently enters the reaction vessel 8. Heating block 11 heats the reactor 8. Since the continuous adsorption of water from the wastewater by the extract leads to a decrease in the extract's solubility and consequently a lower conversion efficiency, the first pump 18 pumps the extract from the filter box 21 through the second circulation pipe 15 and the first electronic valve 17, then through the filter collection pipe 14 into the reactor 8. The extract in the reactor 8 is heated by heating block 11. Water evaporated from the extract enters the externally connected water source collection pipe through the steam collection pipe 13 and is collected in the external water source collection tank. During the water collection process, the second pump 20 will also return the extracted liquid after evaporation through the first circulation pipe 6 to the filter box 21 via the discharge pipe 16 and the second electronic valve 19, and then permeate again to achieve maximum permeation efficiency. After a process is completed, or after a period of time, the first superhydrophilic filter 29 and the second superhydrophilic filter 28 in the filter pipe 1 need to be replaced, and the cleaning pipe 4 needs to be opened to clean the bottom surface of the collection box 3 to remove the sediment. Finally, the steam collection pipe 13 is supplied with water through the external water pipe for reverse cleaning.

[0018] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A machining oily wastewater treatment system, comprising a filter pipe (1), characterized in that: A support frame (2) is fixedly connected to the lower outer side of the filter pipe (1), and a water outlet pipe is installed in the middle of the bottom surface of the filter pipe (1) and connected to the inner cavity of the filter pipe (1); a flange is fixedly connected to the other end of the water outlet pipe, and a collection box (3) with support platforms fixedly connected to the four corners of the bottom surface is installed on one side of the filter pipe (1); a cleaning pipe (4) connected to the inner cavity of the collection box (3) is installed on the other side below the collection box (3), and a feed pipe (5) is connected to the middle of the top surface of the collection box (3), and a feed pipe is installed on one side of the feed pipe (5) and connected to the inner cavity of the collection box (3). The first circulation pipe (6) inside the collection box (3), the cleaning pipe (4) and the feed pipe (5) and the other end of the first circulation pipe (6) are all fixed with flanges, and the outlet pipe is connected to a connecting pipe (7) through the flange. The other end of the connecting pipe (7) is connected to the feed pipe (5) through the flange. A reaction vessel (8) is installed on one side of the collection box (3). An initial filtration assembly is installed inside the filter pipe (1), and an osmotic pressure filtration circulation assembly is installed between the collection box (3) and the reaction vessel (8).

2. The machining oily wastewater treatment system according to claim 1, characterized in that: The top surface of the reactor (8) is connected to a top cover (9) via a flange, and a protective cover (10) is installed in the middle of the outer side of the reactor (8). Multiple heating blocks (11) are installed at equal intervals above and below the protective cover (10) and the reactor (8). A connecting hole is opened in the middle of the top surface of the top cover (9) to connect to the inner cavity of the reactor (8), and a vacuum pump (12) matching the connecting hole is installed on the top surface of the top cover (9). A steam collection pipe (13) is installed on one side of the connecting hole, penetrating the top cover (9) and communicating with the inner cavity of the reactor (8), and a filter collection pipe (14) is installed on the other side of the connecting hole, penetrating the top cover (9) and communicating with the inner cavity of the reactor (8).

3. The machining oily wastewater treatment system according to claim 2, characterized in that: The osmotic pressure filtration circulation assembly includes a second circulation pipe (15) installed at the lower front end of one side of the collection box (3). The other side of the second circulation pipe (15) is connected to a first electronic valve (17) via a flange. The other end of the first electronic valve (17) is connected to a first connecting pipe via a flange. The other end of the first connecting pipe is connected to a first impeller pump (18) via a flange. The other end of the first impeller pump (18) is connected to a second connecting pipe via a flange. The other end of the second connecting pipe is connected to the filter collection pipe (14) via a flange.

4. The machining oily wastewater treatment system according to claim 3, characterized in that: The reactor (8) is connected to the inner cavity below the rear end with a discharge pipe (16). The other end of the discharge pipe (16) is connected to a second electronic valve (19) via a flange. The other end of the second electronic valve (19) is connected to a third connecting pipe via a flange. The other end of the third connecting pipe is connected to a second impeller pump (20) via a flange. The other end of the second impeller pump (20) is connected to a fourth connecting pipe via a flange. The other end of the fourth connecting pipe is connected to the first circulation pipe (6) via a flange.

5. The machining oily wastewater treatment system according to claim 4, characterized in that: A filter box (21) with a double-layer multi-mesh structure is installed at the lower end of the first circulation pipe (6). The two layers of the filter box (21) form a placement cavity (22). A forward osmosis membrane (23) is installed in the placement cavity (22). The first circulation pipe (6) and the second circulation pipe (15) both penetrate the filter box (21) and are placed in the inner cavity of the filter box (21). A liquid level sensor (24) is vertically installed at the rear end of the top surface of the other side of the collection box (3). An air supply pipe (25) is vertically installed at the front end of the top surface of the other side of the collection box (3). The liquid level sensor (24) and the air supply pipe (25) both penetrate the top surface of the collection box (3) and are placed in the inner cavity of the collection box (3).

6. The machining oily wastewater treatment system according to claim 5, characterized in that: The initial filtration assembly includes a positioning tube (26) vertically installed inside the filter tube (1) and connected to the water outlet pipe. A first threaded groove is provided on the upper part of the inner wall of the filter tube (1). A barrier tube (27) is vertically installed on the outer side of the positioning tube (26). The bottom surface of the barrier tube (27) is fixed to the bottom surface of the filter tube (1), and the vertical height of the barrier tube (27) is higher than that of the positioning tube (26). The top surface of the barrier tube (27) is lower than the top surface of the filter tube (1), and a second threaded groove is provided on the upper part of the inner wall of the barrier tube (27). The bottom surface of the barrier tube (27) is provided with multiple guide grooves at equal intervals, and the filter tube (1) and the barrier tube (27) are connected by a first protective platform through a first threaded groove. A wastewater inlet pipe is installed through the middle of the top surface of the first protective platform, and a first superhydrophilic filter screen (29) is installed on the bottom surface of the first protective platform. The positioning tube (26) and the barrier tube (27) are connected by a second protective platform through a second threaded groove, and a second superhydrophilic filter screen (28) is installed on the bottom surface of the second protective platform.

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