A continuous multi-stage filtering aluminum chip cutting fluid recycling equipment

Abstract

The present application relates to the technical field of industrial waste liquid treatment and resource recovery, and particularly relates to a continuous multi-stage filtering aluminum chip cutting fluid recycling equipment. The equipment comprises, from top to bottom, a discharging shell, a stirring shell, a discharging shell, a centrifuge shell and a sedimentation tank which are sequentially connected, the stirring shell is internally provided with a conical stirring block and a crushing needle driven by a first motor for crushing the solidified cutting fluid, the discharging shell is internally provided with a flat sieve and an inclined scraper mechanism to realize coarse screening and slag discharge, the centrifuge shell is internally provided with a coaxially sleeved centrifuge barrel, a centrifuge sieve and a conical spiral blade to realize high-speed centrifugal solid-liquid separation, and the sedimentation tank is internally provided with a baffling sedimentation channel formed by multiple partitions and trapezoidal filter screens and is additionally provided with a floating oil cleaning device. The present application realizes continuous and automatic treatment of the aluminum chip cutting fluid through the highly integrated multi-stage processing module, and has the advantages of strong adaptability, complete separation, high recycling efficiency, stable operation and good environmental protection.

Description

Technical Field

[0001] This invention relates to the field of industrial wastewater treatment and resource recycling technology, specifically to a continuous multi-stage filtration system for recycling aluminum chip cutting fluid. Background Technology

[0002] In the machining industry, especially in the mass production of components such as gearbox housings, cutting fluid is widely used. Waste cutting fluid contains large amounts of aluminum shavings, impurities, and grease; direct discharge pollutes the environment, while outsourcing treatment is costly. Therefore, recycling and purifying cutting fluid is crucial for enterprises to reduce costs, increase efficiency, and achieve green production.

[0003] Common cutting fluid treatment technologies include natural sedimentation, single filtration, offline centrifugation, and a combination of these methods. These methods are characterized by lengthy processes, dispersed equipment, large footprint, high energy consumption, and poor system coordination.

[0004] Especially in actual production of gearbox housings, existing technologies face more prominent problems: First, it is difficult to handle the frozen or solidified cutting fluid generated in winter or during shutdown, which often requires manual pretreatment; second, it is not thorough to separate complex waste liquids (such as those containing a large amount of aluminum shavings, emulsified oil and floating oil); and third, it is easy to generate secondary pollution such as oil mist and odor when improving the treatment effect.

[0005] In summary, existing technologies are insufficient to meet the treatment needs of large-scale production wastewater that is complex in composition, may solidify, and requires continuous and efficient operation. They suffer from poor adaptability, low efficiency, incomplete separation, and high overall costs. Therefore, there is an urgent need for a new type of integrated equipment to achieve continuous, efficient, and end-to-end recovery of cutting fluids in complex states. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a continuous multi-stage filtration aluminum chip cutting fluid recycling device, comprising, from top to bottom, a feeding shell, a stirring shell, a discharging shell, a centrifuge shell, and a sedimentation tank. The centrifuge shell is located above the sedimentation tank, and a load-bearing plate is installed at the bottom of the centrifuge shell. A centrifugal screen is rotatably connected inside the load-bearing plate, and a centrifugal barrel is coaxially embedded inside the centrifugal screen. A drain hole is provided on the lower part of the side wall of the centrifugal barrel. A conical spiral blade is provided between the centrifugal screen and the centrifugal barrel. A first motor is located at the bottom of the sedimentation tank, and the output shaft of the first motor is connected to an upwardly extending first rotating shaft. The first rotating shaft drives the centrifugal barrel. A slag hopper is connected to the side wall of the discharging shell, and a water outlet channel is provided on the load-bearing plate.

[0007] Preferably, the mixing shell is provided with a mixing mechanism, which includes a conical mixing block, a first rotating shaft extending upward and connected to the conical mixing block through a spline shaft, and an array of pulverizing needles distributed on the conical mixing block.

[0008] Preferably, a spring is provided at the top of the splined shaft of the first rotating shaft, the spring is located inside the conical stirring block, and a fan blade is connected to the bottom of the conical stirring block.

[0009] Preferably, the discharge shell is provided with a screening mechanism, which includes a flat screen and a receiving box. The flat screen is located above the centrifugal screen, and the receiving box is connected to the upper side wall of the discharge shell, with an opening on its top that is closed by a lifting cover.

[0010] Preferably, the discharge shell is provided with an inclined plate, the centrifugal screen is rotatably connected to the inclined plate, and the side wall of the centrifugal screen is connected to a scraper. The scraper is in contact with the surface of the inclined plate and is used to scrape the solids toward the slag hopper.

[0011] Preferably, the upper outer wall of the centrifugal screen is provided with an annular blade fan, the lower part of the load-bearing plate is provided with a spiral buffer belt, the water outlet channel is connected to the spiral buffer belt, and the lower end of the spiral buffer belt is connected to the sedimentation tank through a water pipe.

[0012] Preferably, the sedimentation tank is provided with a first baffle, a second baffle, a third baffle, and a fourth baffle. The lower edge of the first baffle is connected to the bottom of the sedimentation tank. The lower edges of the second and fourth baffles are separated from the bottom of the sedimentation tank. The lower edge of the third baffle is connected to the bottom of the sedimentation tank and its height is lower than that of the first baffle. A trapezoidal filter screen is provided between the first and second baffles. The sedimentation tank is also provided with an oil floating cleaning device. A valve is provided at the bottom of the sedimentation tank.

[0013] Preferably, the oil spill cleaning device includes a second motor and a support plate. The second motor is mounted on the support plate, and its output shaft passes through the support plate and is connected to a first roller. A second roller is provided below the support plate. An oil scraper is wound around the first roller and the second roller. An oil scraper is provided on the support plate, and the oil scraper penetrates and extends through the side wall of the sedimentation tank.

[0014] Preferably, a third motor is provided above the slag discharge hopper, and the output shaft of the third motor passes through the slag discharge hopper and is connected to a second rotating shaft, on which straight spiral blades are provided.

[0015] Preferably, an electric heating coil is provided in the interlayer of the mixing shell, and the exhaust ports of the feeding shell, centrifuge shell and sedimentation tank are all connected to a pipeline, with an air purifier connected to the air outlet of the pipeline.

[0016] The beneficial effects of this invention are:

[0017] (1) The present invention adopts a highly integrated modular design, which realizes the adaptive processing of complex materials. The equipment can directly process cutting fluid that is frozen in winter or solidified under normal conditions through the integrated powerful stirring and crushing mechanism, without the need for manual pre-thawing or pre-treatment. This effectively solves the core problem of poor adaptability of existing technologies to the physical state of materials, and ensures the continuous and stable operation of the system under various harsh working conditions.

[0018] (2) This invention achieves the advantages of thorough separation and high-quality recovery through the orderly integration of functions. It compactly integrates functional modules such as stirring and crushing, mechanical screening, high-speed centrifugation, multi-stage baffle sedimentation, fine filtration and automatic oil scraping into one, forming a progressively deepening processing chain, thereby realizing the systematic separation of solid impurities, floating oil and emulsified oil, and significantly improving the cleanliness and reuse quality of the recovered cutting fluid.

[0019] (3) This invention achieves continuous automation and efficient operation through process-integrated design. The entire system achieves physical connection and process flow from top to bottom, and operates continuously from feeding to clean water reuse, which greatly improves processing capacity and operating efficiency. It perfectly meets the production rhythm requirements of modern production lines for continuous discharge and real-time treatment of waste liquid, and realizes integrated operation with high efficiency, energy saving and low maintenance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the overall appearance and structure of the present invention. Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the first internal structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the second internal structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the third internal structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the spiral buffer strip structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the internal structure of the sedimentation tank of the present invention;

[0027] Figure 8 This is a schematic diagram of the oil spill cleaning device of the present invention.

[0028] In the diagram, the following labels are used: 100-Sedimentation tank, 101-Centrifuge casing, 102-Discharge casing, 103-Agitator casing, 104-Feeding casing, 105-Valve, 200-Supporting plate, 201-Centrifuge sieve, 202-Centrifuge drum, 2021-Drain hole, 203-Conical spiral blades, 204-First motor, 205-First shaft, 206-Spiral buffer belt, 207-Water pipe, 208-Annular blade, 300-Inclined plate, 301-Scraper, 400-Conical agitator block, 401-Pulverizing needle, 402-Spring. 403-Wind blade, 500-Flat screen, 501-Receiving box, 502-Lifting cover, 600-First partition, 601-Second partition, 602-Third partition, 603-Fourth partition, 604-Trapezoidal filter screen, 605-Second motor, 606-Support plate, 607-First roller, 608-Second roller, 609-Oil scraper belt, 610-Oil scraper, 700-Slag hopper, 701-Third motor, 702-Second rotating shaft, 703-Straight spiral blade, 800-Heating coil, 900-Pipeline, 901-Air purifier. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Example

[0031] A continuous multi-stage filtration system for recycling and circulating aluminum chip cutting fluid, such as... Figure 1 and Figure 2 As shown, the process includes a feeding shell 104, a stirring shell 103, a discharging shell 102, a centrifuge shell 101, and a sedimentation tank 100, which are connected sequentially from top to bottom, forming a continuous process flow channel.

[0032] like Figure 1 , Figure 3 and Figure 4 As shown, the centrifuge casing 101 is located above the sedimentation tank 100, and a load-bearing plate 200 is fixedly installed at its bottom. A centrifuge screen 201 is rotatably connected inside the load-bearing plate 200 via bearings. A centrifuge barrel 202 is coaxially embedded inside the centrifuge screen 201. A drain hole 2021 is provided on the lower part of the side wall of the centrifuge barrel 202. A conical spiral blade 203 is provided in the annular space between the centrifuge screen 201 and the centrifuge barrel 202. A first motor 204 is installed at the bottom of the sedimentation tank 100. The output shaft of the first motor 204 is connected to a first rotating shaft 205 that extends vertically upward. The upper end of the first rotating shaft 205 passes through the load-bearing plate 200 and is drivenly connected to the centrifuge barrel 202. An outlet is provided on the side wall of the discharge casing 102 and is connected to a slag hopper 700. A water outlet channel is provided on the load-bearing plate 200.

[0033] Through the above-mentioned structural configuration, the cutting fluid to be treated can be crushed by the stirring mechanism in the stirring shell 103, preliminarily screened by the screening mechanism in the discharge shell 102, and centrifugally separated into solid and liquid by the centrifugal separation mechanism consisting of centrifugal tank 202, centrifugal screen 201 and conical spiral blade 203. Finally, the separated liquid enters the sedimentation tank 100 for deep treatment through the water outlet channel, and the separated solid is discharged through the slag hopper 700.

[0034] This equipment can continuously process cutting fluids that have frozen in winter, solidified paste-like cutting fluids at room temperature, and waste liquids containing large amounts of aluminum shavings and impurities. The entire system forms a continuous processing line from top to bottom, consisting of a feeding shell 104, a mixing shell 103, a discharging shell 102, a centrifuge shell 101, and a sedimentation tank 100. Waste cutting fluids in various states enter from the top and are powerfully crushed and homogenized in the mixing shell 103. Large impurities and incompletely dissolved lumps are intercepted in the discharging shell 102. In the centrifuge shell 101, the centrifuge tank 202, centrifuge screen 201, and conical spiral blades 203 achieve core solid-liquid separation. The separated liquid phase enters the bottom sedimentation tank 100 through the water outlet channel on the load-bearing plate 200 for deep sedimentation and oil removal. Aluminum shavings, impurities, and solidified fragments are pushed upwards by the conical spiral blades 203 and finally discharged through the slag hopper 700. The entire process realizes continuous, integrated treatment and recycling of cutting fluids in complex states.

[0035] like Figure 3 and Figure 4 As shown, a stirring mechanism is provided inside the stirring shell 103. The stirring mechanism includes a conical stirring block 400. A first rotating shaft 205 extends upward into the stirring shell 103 and is driven by the conical stirring block 400 through a splined shaft. Multiple pulverizing needles 401 are arranged in an array on the working surface of the conical stirring block 400.

[0036] The stirring mechanism is a key component for processing solidified or semi-solidified cutting fluids. Driven by the first rotating shaft 205, a high-speed rotating conical stirring block 400 utilizes its densely packed crushing needles 401 to mechanically break up, shear, and stir the added frozen cutting fluid blocks and paste-like solidified fluid. The crushing needles 401 effectively pierce, tear, and disperse the solidified fluid, while simultaneously breaking up large aluminum chips and impurities mixed in, separating them from the liquid and reducing their size, thus creating the necessary conditions for subsequent screening and centrifugal separation.

[0037] like Figure 4 As shown, a spring 402 is provided between the top of the spline shaft of the first rotating shaft 205 and the inside of the conical stirring block 400. In addition, a fan blade 403 is fixedly connected to the bottom of the conical stirring block 400.

[0038] The elastic buffer mechanism formed by spring 402 is particularly suitable for handling waste cutting fluid from gearboxes that may contain hard impurities. When the conical agitator 400 encounters large solidified pieces or metal fragments that are not completely broken, the conical agitator 400 can compress the spring 402 to make the conical agitator 400 float up and down, avoiding jamming or damage to the transmission system. The downward airflow generated by the fan blades 403 when rotating can not only accelerate the passage of broken materials, but also play a certain role in disturbing any light foam or oil mist that may be present, which helps the thick slurry containing a large amount of waste residue to smoothly enter the next process.

[0039] like Figures 3-5 As shown, a screening mechanism is provided inside the discharge housing 102. The screening mechanism includes a flat screen 500 and a receiving box 501. The flat screen 500 is horizontally or inclinedly arranged in the space above the centrifugal screen 201. The receiving box 501 is fixedly connected to the upper side wall of the discharge housing 102 and communicates with its interior. A material receiving port is opened on the top of the receiving box 501. The material receiving port is closed by an openable and closable cover 502.

[0040] The flat screen 500 is particularly important for cutting fluids containing a large amount of shell processing waste. After being stirred and crushed, the slurry flows through the flat screen 500, where larger aluminum chips, plastic fragments, and solidified lumps that are not completely crushed are trapped on the screen surface, preventing them from entering the precision centrifuge mechanism and causing damage or blockage. The intercepted solid waste slides into the receiving box 501 for temporary storage, and is cleaned periodically by opening the lifting cover 502, effectively removing coarse impurities and ensuring the stable operation of subsequent centrifugal separation.

[0041] like Figure 3 As shown, an inclined plate 300 is also fixedly installed inside the discharge shell 102. The upper part of the centrifugal screen 201 is rotatably connected to the inclined plate 300 through a bearing. At least one scraper 301 is fixedly connected to the outer wall of the centrifugal screen 201. The end of the scraper 301 maintains sliding contact with the upper surface of the inclined plate 300.

[0042] The inclined plate 300 and scraper 301 can handle aluminum-containing waste residue with high moisture content discharged from the centrifugal separation mechanism. Regardless of whether the waste residue is viscous due to low winter temperatures or has strong adhesion due to high oil content, the rotating scraper 301 can continuously scrape it off the inclined plate 300 and force it towards the slag hopper 700. This ensures that the slag discharge channel will not be blocked even when handling wet and sticky waste residue with complex composition generated from gearbox processing.

[0043] like Figure 3 and Figure 6As shown, an annular blade fan 208 is fixedly installed on the upper outer wall of the centrifugal screen 201, and a spiral buffer belt 206 is fixedly connected below the load-bearing plate 200. Its inlet is connected to the water outlet channel on the load-bearing plate 200, and the lower outlet of the spiral buffer belt 206 is connected to the liquid inlet area of ​​the sedimentation tank 100 through a water pipe 207.

[0044] The airflow generated by the annular fan blade 208 helps improve the microenvironment within the centrifuge housing 101, which is beneficial for treating gearbox cutting fluid that is prone to producing oil mist and odor. The spiral buffer belt 206 provides a smooth buffer and flow path for the separated liquid. For the treated cutting fluid, especially liquids whose sedimentation effect may be affected by temperature changes or the presence of fine air bubbles, the spiral buffer belt 206 enables it to enter the sedimentation tank 100 smoothly and evenly, creating stable initial conditions for deep purification.

[0045] like Figure 7 As shown, the sedimentation tank 100 is vertically arranged with a first baffle 600, a second baffle 601, a third baffle 602, and a fourth baffle 603 in sequence along the liquid flow direction. The lower edge of the first baffle 600 is sealed to the bottom of the tank. The lower edges of the second baffle 601 and the fourth baffle 603 are left with gaps to the bottom of the tank. The lower edge of the third baffle 602 is sealed to the bottom of the tank, but its top height is lower than that of the first baffle 600. A trapezoidal filter screen 604 is provided in the sedimentation chamber between the first baffle 600 and the second baffle 601. An oil floating cleaning device is also integrated into the sedimentation tank 100. A valve 105 is installed at the bottom of the sedimentation tank 100.

[0046] In response to the characteristics of high oil content and numerous suspended fine metal particles in gearbox machining cutting fluid, the sedimentation tank 100 adopts a multi-stage baffle sedimentation design. The liquid flows sequentially through the tortuous channel formed by the first baffle 600, the second baffle 601, the third baffle 602, and the fourth baffle 603, which greatly reduces the flow velocity, allowing most of the suspended fine aluminum powder and impurities to settle fully. The trapezoidal filter screen 604 acts as a fine physical barrier to further intercept residual fine particles. An integrated floating oil cleaning device is used to remove lubricating oil and emulsified oil floating on the liquid surface. Finally, the clarified cutting fluid at the bottom of the tank can be recycled back to the production line through valve 105, effectively separating the three phases of oil, sludge, and water.

[0047] like Figure 8As shown, the oil spill cleaning device includes a second motor 605 and a horizontally positioned support plate 606. The second motor 605 is fixedly installed on the upper surface of the support plate 606. The output shaft of the second motor 605 passes downward through the support plate 606 and drives the first roller 607. A second roller 608 is installed below the support plate 606. An annular oleophilic oil scraping band 609 is tightly wrapped around the first roller 607 and the second roller 608. An oil scraper 610 is also installed on the support plate 606. Its scraper blade contacts the surface of the moving oil scraping band 609, and the oil scraper 610 penetrates and extends out of the side wall of the sedimentation tank 100.

[0048] The oil removal device continuously removes the oil floating on the surface of the sedimentation tank 100. The oleophilic oil scraper 609 continuously carries the oil away from the surface. After being scraped off by the oil scraper 610, the oil is collected and recycled. This process not only purifies the cutting fluid and improves the recycling quality, but also avoids secondary pollution and odor problems caused by the accumulation of oil in the tank.

[0049] like Figure 5 As shown, a third motor 701 is installed on the top of the slag discharge hopper 700. The output shaft of the third motor 701 passes vertically downward through the shell of the slag discharge hopper 700 and drives a second rotating shaft 702 located inside the hopper. Straight spiral blades 703 are welded or sleeved on the second rotating shaft 702.

[0050] The straight spiral blades 703 inside the slag hopper 700 perform the final processing on the collected aluminum-containing wet slag. During the conveying process, the straight spiral blades 703 apply strong extrusion and shearing force to the slag material, significantly reducing its moisture content and forming a relatively dry slag cake. This greatly reduces the volume and weight of solid waste and lowers disposal costs. On the other hand, the extruded liquid can be recycled, improving the overall recovery rate of cutting fluid. It is particularly suitable for processing large-volume waste slag from shell production lines.

[0051] like Figure 3 and Figure 5 As shown, an electric heating coil 800 is embedded in the shell interlayer of the stirring shell 103. The exhaust ports respectively provided on the feeding shell 104, centrifuge shell 101 and sedimentation tank 100 are connected and gathered through a common pipe 900. An air purifier 901 is connected to the air outlet of the pipe 900.

[0052] The electric heating coil 800 is a key measure to address the freezing of cutting fluid in winter. After starting, it heats the stirring shell 103, which can quickly melt frozen or low-temperature solidified cutting fluid blocks and restore their fluidity, ensuring that crushing and subsequent processes can proceed normally. This guarantees the applicability of the equipment in low-temperature environments. The exhaust gas treatment system, consisting of the pipeline 900 and the air purifier 901, effectively collects and purifies oil mist, water vapor, and odors that may be generated during the entire treatment process. Especially during the stirring, crushing, and centrifugal separation stages, it improves the working environment, meets environmental emission requirements, and solves the air pollution problem in the cutting fluid treatment process.

[0053] The working principle of this invention is as follows:

[0054] After the complex-state waste cutting fluid to be processed enters the equipment from the feeding shell 104, it first undergoes strong mechanical crushing and homogenization in the mixing shell 103 by the conical mixing block 400 and the crushing needle 401. The electric heating coil 800 assists in dealing with the frozen material and restoring its fluidity. Subsequently, the slurry undergoes primary screening in the discharge shell 102 by the flat screen 500 to intercept large particles of impurities to the receiving box 501.

[0055] The treated slurry enters the core centrifugal separation stage. Under the centrifugal force generated by the high-speed rotating centrifugal drum 202, the solid and liquid are initially separated. The liquid is thrown out through the drain hole 2021 and passes through the mesh of the centrifugal screen 201 for further filtration. The separated solid is pushed upward by the conical spiral blades 203. The filtered clear liquid enters the spiral buffer belt 206 through the water outlet channel on the load-bearing plate 200 and then flows smoothly into the sedimentation tank 100.

[0056] In the sedimentation tank 100, the liquid flows through the baffle channel formed by the first baffle 600, the second baffle 601, the third baffle 602 and the fourth baffle 603 in sequence, and the flow velocity is significantly reduced, so that the suspended fine particles can settle fully. At the same time, the trapezoidal filter screen 604 performs fine interception. The floating oil on the liquid surface is automatically adsorbed and scraped off by the cleaning device composed of the oil scraper 609 and the oil scraper 610. Finally, the deeply purified regenerated cutting fluid accumulates at the bottom of the tank and can be recovered through the valve 105.

[0057] The solids separated by centrifugation and the material on the screen are continuously pushed to the top, where they are scraped by the rotating scraper 301 to the inclined plate 300 and introduced into the slag hopper 700. The straight spiral blades 703 in the slag hopper 700 squeeze, transport and dehydrate the wet slag, and discharge it after forming dry slag. Throughout the process, the oil mist and exhaust gas that may be generated in each stage are collected through the pipe 900 connecting the feeding shell 104, the centrifuge shell 101 and the sedimentation tank 100, and are uniformly transported to the air purifier 901 for treatment before being discharged, thus achieving environmentally friendly closed-loop operation.

[0058] This equipment achieves continuous, automated, efficient recovery and recycling of cutting fluid containing aluminum chips through multi-stage synergy, including crushing and homogenization, coarse screening, high-speed centrifugal separation, baffle sedimentation and fine filtration, floating oil removal, waste residue dewatering, and exhaust gas purification.

Claims

1. A continuous multi-stage filtration aluminum chip cutting fluid recovery and circulation device, characterized in that, The system includes, from top to bottom, a feeding shell (104), a stirring shell (103), a discharging shell (102), a centrifuge shell (101), and a sedimentation tank (100). The centrifuge shell (101) is located above the sedimentation tank (100). A load-bearing plate (200) is installed at the bottom of the centrifuge shell (101). A centrifuge screen (201) is rotatably connected inside the load-bearing plate (200). A centrifuge barrel (202) is coaxially embedded inside the centrifuge screen (201). The lower part of the side wall of the centrifuge barrel (202) is open. The centrifuge is equipped with a drain hole (2021), and a conical spiral blade (203) is provided between the centrifuge screen (201) and the centrifuge barrel (202). A first motor (204) is provided at the bottom of the sedimentation tank (100). The output shaft of the first motor (204) is connected to an upwardly extending first rotating shaft (205). The first rotating shaft (205) drives the centrifuge barrel (202). The side wall of the discharge shell (102) is connected to a slag hopper (700). A water outlet channel is provided on the load-bearing plate (200).

2. The continuous multi-stage filtration aluminum chip cutting fluid recovery and circulation equipment according to claim 1, characterized in that, The stirring shell (103) is provided with a stirring mechanism, which includes a conical stirring block (400). The first rotating shaft (205) extends upward and is connected to the conical stirring block (400) through a spline shaft. The conical stirring block (400) is provided with an array of pulverizing needles (401).

3. The continuous multi-stage filtration aluminum chip cutting fluid recovery and circulation equipment according to claim 2, characterized in that, The splined shaft of the first rotating shaft (205) is provided with a spring (402), which is located inside the conical stirring block (400). A fan blade (403) is connected to the bottom of the conical stirring block (400).

4. The continuous multi-stage filtration aluminum chip cutting fluid recovery and circulation equipment according to claim 1, characterized in that, The discharge housing (102) is equipped with a screening mechanism, which includes a flat screen (500) and a receiving box (501). The flat screen (500) is located above the centrifugal screen (201). The receiving box (501) is connected to the upper side wall of the discharge housing (102), and an opening is provided on its top by a lifting cover (502).

5. The continuous multi-stage filtration aluminum chip cutting fluid recovery and circulation equipment according to claim 1, characterized in that, An inclined plate (300) is provided inside the discharge shell (102). The centrifugal screen (201) is rotatably connected to the inclined plate (300). A scraper (301) is connected to the side wall of the centrifugal screen (201). The scraper (301) is in contact with the surface of the inclined plate (300) and is used to scrape the solid towards the slag hopper (700).

6. The continuous multi-stage filtration aluminum chip cutting fluid recovery and circulation equipment according to claim 1, characterized in that, The centrifugal screen (201) has an annular blade fan (208) on its upper outer wall, and a spiral buffer belt (206) is provided below the load-bearing plate (200). The water outlet channel is connected to the spiral buffer belt (206), and the lower end of the spiral buffer belt (206) is connected to the sedimentation tank (100) through a water pipe (207).

7. The continuous multi-stage filtration aluminum chip cutting fluid recovery and circulation equipment according to claim 1, characterized in that, The sedimentation tank (100) is provided with a first partition (600), a second partition (601), a third partition (602) and a fourth partition (603). The lower edge of the first partition (600) is connected to the bottom of the sedimentation tank (100). The lower edges of the second partition (601) and the fourth partition (603) are separated from the bottom of the sedimentation tank (100). The lower edge of the third partition (602) is connected to the bottom of the sedimentation tank (100) and its height is lower than that of the first partition (600). A trapezoidal filter screen (604) is provided between the first partition (600) and the second partition (601). The sedimentation tank (100) is also provided with an oil floating cleaning device. A valve (105) is provided at the bottom of the sedimentation tank (100).

8. The continuous multi-stage filtration aluminum chip cutting fluid recovery and circulation equipment according to claim 7, characterized in that, The oil spill cleaning device includes a second motor (605) and a support plate (606). The second motor (605) is mounted on the support plate (606), and its output shaft passes through the support plate (606) and is connected to a first roller (607). A second roller (608) is provided below the support plate (606). An oil scraper (609) is wound around the first roller (607) and the second roller (608). An oil scraper (610) is provided on the support plate (606), and the oil scraper (610) penetrates and extends out of the side wall of the sedimentation tank (100).

9. The continuous multi-stage filtration aluminum chip cutting fluid recovery and circulation equipment according to claim 1, characterized in that, A third motor (701) is provided above the slag discharge hopper (700). The output shaft of the third motor (701) passes through the slag discharge hopper (700) and is connected to a second rotating shaft (702). A straight spiral blade (703) is provided on the second rotating shaft (702).

10. The continuous multi-stage filtration aluminum chip cutting fluid recovery and circulation equipment according to claim 1, characterized in that, The mixing shell (103) is provided with an electric heating coil (800) in the interlayer. The exhaust ports of the feeding shell (104), centrifuge shell (101) and sedimentation tank (100) are connected to the pipe (900). The air outlet of the pipe (900) is connected to an air purifier (901).

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