Solid waste treatment equipment and method in waste cutting fluid and resource utilization method

Abstract

The invention discloses a device and method for treating solid waste in waste cutting fluid and a method for resource utilization, comprising a stirring emulsifying kettle, a high-shear homogenizer, an ultrasonic cavitation device and a separation device; a feed port is provided on the top of the stirring emulsifying kettle and is connected to a discharge port of the ultrasonic cavitation device, and a three-way discharge port is provided on the bottom, one of the discharge ports is connected to the feed port of the ultrasonic cavitation device via a pneumatic diaphragm pump to form a circulating water circuit, and the other discharge port is connected to the separation device; the high-shear homogenizer is arranged above the stirring emulsifying kettle; the invention can realize the recovery and reuse of metal substances in waste cutting fluid, the whole process adopts physical means, avoids the use of auxiliary materials such as surfactants, and no waste liquid is generated.

Description

Technical Field

[0001] The present invention relates to the technical field of waste cutting fluid treatment, and in particular to a device and method for treating solid waste in waste cutting fluid and a resource utilization method. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art.

[0003] The metal cutting process inevitably uses auxiliary materials such as cutting fluids, which require regular replacement. This waste fluid and its solid components, containing mineral oils, metals, and non-metallic oxides, are classified as hazardous waste. Its disposal and resource utilization have long been a major challenge for the industrial community.

[0004] In comparison, the equipment for treating waste cutting fluid is relatively well developed, with processes such as oil-water separation and solid-liquid separation. Industrial equipment offers a wide range of options, and harmless disposal of waste cutting fluid can be achieved through steps such as oil-water separation, flocculation, and precipitation. However, there is still a lack of effective disposal equipment and resource utilization technologies for the solids in waste cutting fluid, or the solid waste after flocculation and precipitation. After filtration, this type of solid waste contains approximately 50% metallic materials, approximately 20% non-metallic inclusions (high-speed cutting causes instantaneous high temperatures, generating cutting fluid sludge that adheres to the surface of metal chips), and approximately 30% water. The traditional disposal process involves high-temperature incineration after filtration, which presents the following problems: first, the incineration process consumes a lot of energy; second, the combustion of non-metallic inclusions will produce a large amount of harmful smoke pollution; and third, it results in a large waste of metal resources. Summary of the Invention

[0005] In response to the problems existing in the prior art, the present invention provides a solid waste treatment device and method in waste cutting fluid and a resource utilization method, which can harmlessly treat the solid waste in waste cutting fluid and realize the resource utilization of high-value metals in the solid waste.

[0006] The technical solutions of the present invention are as follows:

[0007] In the first aspect of the present invention, a solid waste treatment device in waste cutting fluid is provided, comprising a stirring emulsification kettle, a high shear homogenizer, an ultrasonic cavitation device and a separation device; a feed port is provided on the top of the stirring emulsification kettle and connected to the discharge port of the ultrasonic cavitation device, and a three-way discharge port is provided on the bottom, one of the discharge ports is connected to the feed port of the ultrasonic cavitation device through a pneumatic diaphragm pump to form a circulating water circuit, and the other discharge port is connected to the separation device; the high shear homogenizer is arranged above the stirring emulsification kettle.

[0008] In a second aspect of the present invention, a method for treating solid waste in waste cutting fluid is provided, comprising the following steps:

[0009] The waste cutting fluid containing solid waste is subjected to filter pressing;

[0010] Add the material into the stirred reactor and add water into the reactor, the ratio of material to water is 1:4-5;

[0011] Turn on the high shear homogenizer and process for 10-20 minutes, controlling the speed at 2200-2700 r / min;

[0012] Open the discharge port connecting the stirring emulsification kettle and the ultrasonic cavitation device, start the pneumatic diaphragm pump and ultrasonic transducer, circulate the suspension, and perform ultrasonic cavitation treatment with an ultrasonic power of 2000-3000w;

[0013] A small amount of suspension is extracted to separate the metal chips and test the composition. If it meets the standard, the discharge port connecting the stirring emulsification kettle and the separation device is opened. If it does not meet the standard, the cycle treatment is continued.

[0014] Open the separation equipment to collect the metal chips.

[0015] In a third aspect of the present invention, a method for resource utilization of solid waste in waste cutting fluid is provided, comprising the following steps:

[0016] The collected metal chips are sent to the track-type drying kiln for drying at a temperature of 200-400°C;

[0017] The dried metal chips are cold pressed in a cold pressing mold with a holding pressure of 100-200 MPa and a holding time of 3-10 minutes to obtain metal chip cold pressed billets, which are used as recycled materials in foundries.

[0018] One or more technical solutions of the present invention have the following beneficial effects:

[0019] (1) The solid waste treatment equipment for waste cutting fluid provided by the present invention has low power consumption, does not require high-temperature treatment, and has low energy consumption. The technical principle is easy to understand, the process is short, and does not require complex processes such as calcination and reduction. The equipment is simple, the investment is small, and the floor space is small.

[0020] (2) The method for treating solid waste in waste cutting fluid provided by the present invention utilizes the principles of fluid shear force, ultrasonic cavitation, etc. to separate non-metallic inclusions and metal chips in the solid waste of waste cutting fluid. The entire process adopts physical means, does not use auxiliary materials such as surfactants, does not generate wastewater, solid waste, smoke, etc., and is green, environmentally friendly.

[0021] (3) The method for treating solid waste from waste cutting fluid and the method for resource utilization provided by the present invention have a high resource recovery rate and high product added value: the present invention can recover metal elements from the solid waste of waste cutting fluid and process the recovered metal chips to achieve high-value utilization. At the same time, the aqueous solution produced is purified and then reused, without generating wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the solid waste treatment equipment in the waste cutting fluid of the present invention.

[0023] Figure 2 This is the macroscopic morphology of solid waste in waste cutting fluid after filtration.

[0024] Figures 3(a) and 3(b) show the microscopic morphology of iron chips extracted from solid waste in waste cutting fluid and dried according to the present invention, and Figures 3(c)-(e) show the composition of iron chips extracted from solid waste in waste cutting fluid and dried according to the present invention.

[0025] Figure 4 This is the metal chip blank formed by cold pressing according to Example 4 of the present invention.

[0026] Among them: 1. Pneumatic diaphragm pump, 2. Ultrasonic emulsification tank, 3. Ultrasonic converter, 4. Feed inlet, 5. High shear homogenizer, 6. Mixing emulsification kettle, 7. Support frame, 8. Separation device, 9. Discharge port, 10. Three-way discharge port. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. 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 component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0030] The solid waste in the waste cutting fluid of the present invention is a mixture of tiny metal chips and cutting fluid sludge remaining in the cutting fluid during the metal material cutting process.

[0031] The metal material of the present invention is pure metal such as copper, iron, aluminum, magnesium or their alloys.

[0032] In one or more embodiments of the present invention, a solid waste treatment device in waste cutting fluid includes a stirring emulsification kettle, a high shear homogenizer, an ultrasonic cavitation device and a separation device; a feed port is provided on the top of the stirring emulsification kettle and connected to the discharge port of the ultrasonic cavitation device, and a three-way discharge port is provided on the bottom, one of the discharge ports is connected to the feed port of the ultrasonic cavitation device through a pneumatic diaphragm pump to form a circulating water circuit, and the other discharge port is connected to the separation device; the high shear homogenizer is arranged above the stirring emulsification kettle.

[0033] The stirring emulsification kettle is a container for converting solid waste in waste cutting fluid into a suspension. It is made of 304 or 316L stainless steel. A feed port is set on the top of the stirring emulsification kettle, which is connected to the discharge port of the ultrasonic cavitation device through a pipeline. A feeding port is also set on the top of the stirring emulsification kettle for adding materials. When adding materials, water is added as required according to the viscosity of the materials.

[0034] Furthermore, a wave-breaking plate and an ozone generator are provided in the stirring emulsifying kettle. The wave-breaking plate can strengthen the fluid shearing effect of the high shear homogenizer. The ozone generator can strengthen the fluid shearing effect on the one hand, and deodorize and sterilize the waste cutting fluid on the other hand, so as to facilitate its reuse.

[0035] Furthermore, the high shear homogenizer includes a motor, the drive shaft of the motor is connected to a coupling, and a rotor and stator working chamber is set at the bottom of the coupling. The motor drives the rotor to rotate at high speed, and the rotation generates negative pressure to suck the material from the bottom of the working chamber and discharge it from the top. In this process, the fluid shear force separates the material.

[0036] Furthermore, an impeller is provided at the middle position of the coupling, and the impeller can increase the stirring force.

[0037] Furthermore, the ultrasonic cavitation device includes an ultrasonic emulsification tank, an ultrasonic transducer, and an amplitude rod. The ultrasonic transducer is connected to the amplitude rod, which is disposed within the ultrasonic emulsification tank, with the distance between the ultrasonic emulsification tank and the amplitude rod being less than 30 cm. The suspension after ultrasonic treatment is returned to the stirred emulsification kettle through a circulating water circuit.

[0038] Furthermore, the separation device is a single-roll magnetic separator, a centrifuge or a vibrating screen. Different solid-liquid separation devices can be set according to actual production needs. The separated metal chips are recovered for standby use, and other liquids are refluxed into the stirring emulsification kettle.

[0039] In one or more embodiments of the present invention, a method for treating solid waste in waste cutting fluid comprises the following steps:

[0040] The waste cutting fluid containing solid waste is filtered to remove water from the waste cutting fluid;

[0041] Add the material into the stirred reactor and add water into the reactor. The ratio of material to water is 1:4-5. The ratio can be adjusted according to the viscosity of the material.

[0042] Run the high shear homogenizer for 10-20 minutes, controlling the speed at 2200-2700 r / min. The high shear homogenizer, on the one hand, disperses the flocculent solids through the shear force of the fluid; on the other hand, it separates the metal chips from the cutting fluid sludge. After a certain period of processing, the flocculent solids are dispersed and become a suspension, with the metal chips and cutting fluid sludge suspended in the liquid.

[0043] Open the discharge port connecting the stirring emulsification kettle to the ultrasonic cavitation device, start the pneumatic diaphragm pump and ultrasonic transducer, circulate the suspension, and perform ultrasonic cavitation treatment at an ultrasonic power of 2000-3000w. The cavitation effect of high-energy ultrasound further separates the metal chips from the cutting fluid sludge and also decomposes the cutting fluid sludge, causing it to redissolve. After a period of circulation, the suspension turns milky white, indicating that the cutting fluid sludge has redissolved.

[0044] A small amount of suspension is extracted to separate the metal chips, and the components are tested. The test results are compared with the national standards for the corresponding scrap metal materials. If the recovered metal chips meet the standards, the discharge port connecting the stirring emulsification kettle and the separation device is opened to allow the suspension in the stirring emulsification kettle to enter the separation device. If not, the circulation process continues;

[0045] Open the separation equipment to collect the metal chips and realize the recycling of the metal chips.

[0046] Furthermore, the waste liquid recovered by the separation equipment is purified, deodorized, and sterilized, and then returned to the factory for use as cutting fluid, thereby realizing the recovery of the cutting fluid.

[0047] In one or more embodiments of the present invention, a method for resource utilization of solid waste in waste cutting fluid comprises the following steps:

[0048] The collected metal chips are sent to the track-type drying kiln for drying at a temperature of 300-400°C. The drying process can remove moisture from the metal chips.

[0049] The dried metal chips are cold pressed in a cold pressing die with a holding pressure of 100-200 MPa and a holding time of 3-10 minutes to obtain metal chip cold pressed blanks, or the dried metal chips are sent to a jet mill for processing to obtain metal powder, which is then recycled.

[0050] Example 1

[0051] A solid waste treatment device for waste cutting fluid, such as Figure 1 As shown, it includes a stirring emulsification kettle 6, a high shear homogenizer 5, an ultrasonic cavitation device and a separation device 8; a feed port 4 is provided on the top of the stirring emulsification kettle 6 to be connected to the discharge port of the ultrasonic cavitation device, and a three-way discharge port 10 is provided on the bottom, one of the discharge ports is connected to the feed port of the ultrasonic cavitation device through a pneumatic diaphragm pump 1 to form a circulating water circuit, and the other discharge port is connected to the separation device 8; the high shear homogenizer 5 is provided above the stirring emulsification kettle 6.

[0052] In this embodiment, a 5mm thick 304 stainless steel plate is selected to make a φ700mm×600mm cylinder with a capacity of 300L. Three sets of wave-breaking plates are welded inside the cylinder to enhance the fluid shear force during the stirring process. A hemispherical base is welded at the lower part of the cylinder, and the base radius is 420mm to ensure that there are no dead angles in the stirring emulsification kettle during the stirring process. A crossbeam is welded on the upper part of the cylinder, and the crossbeam is connected to the support frame to facilitate the installation of the high shear homogenizer 5. A top cover is welded on the upper part of the cylinder, and a feeding port, a feed port and a return port are reserved. The feeding port is used to add materials and water to the stirring emulsification kettle. The feed port is connected to the discharge port of the ultrasonic cavitation device through a pipe, and the return port is connected to the liquid outlet of the separation device through a pipe. The pipe diameter is DN32.

[0053] A three-way discharge port 10 with a diameter of DN40 is installed at the lower center of the hemisphere, which is connected to the pneumatic diaphragm pump 1 and the separation device 8. Three support frames 7 are welded around the outer periphery of the cylinder to support the stirring emulsification kettle.

[0054] A high-shear homogenizer 5 is installed on the upper crossbeam of the mixing emulsifier. Driven by a variable-frequency motor, the homogenizer boasts a continuously adjustable speed of 0-3000 rpm and a power of 5.5 kW. The lower portion of the homogenizer consists of a high-speed rotating rotor and a stator working chamber. The rotor and stator are coaxial, with a gap of 10-150 μm. Rotation of the rotor creates a negative pressure within the working chamber, drawing material in from the bottom and discharging it from the top. This process creates high-speed fluid shear, separating metallic and non-metallic materials from the waste cutting fluid and solid waste, forming a suspension.

[0055] A pneumatic diaphragm pump base is welded to the support frame of the stirring emulsification kettle, and a pneumatic diaphragm pump 1 is installed on the base. The water inlet of the pneumatic diaphragm pump is connected to one of the three-way discharge ports of the stirring emulsification kettle through a pipeline. A valve is provided on the pipeline, and the water outlet is connected to the ultrasonic cavitation device.

[0056] Ultrasonic emulsification tank 2 is made of 5mm thick stainless steel and has a cylindrical structure measuring φ60mm x 500mm. The lower portion of the ultrasonic emulsification tank is equipped with a feed inlet, which is connected to the water outlet of the pneumatic diaphragm pump; the upper portion of the ultrasonic emulsification tank is equipped with a discharge port, which is connected to the feed inlet at the top of the stirring emulsification kettle, forming the first circulating water circuit.

[0057] A DN60 flange is welded to the top of the ultrasonic emulsification tank and an ultrasonic converter (3) is installed on the flange. This can be a submersible ultrasonic wand with a power of 3000W and a frequency of 19-21kHz. The ultrasonic amplitude rod, designed as a gourd, is installed inside the ultrasonic emulsification tank to ensure uniform ultrasonic propagation. The amplitude rod has a minimum diameter of 30mm, a maximum diameter of 50mm, and a length of 480mm. Non-metallic inclusions in the waste cutting fluid solid waste are decomposed and dissolved again under the action of ultrasonic cavitation.

[0058] The other outlet of the three-way outlet of the stirring emulsification kettle is connected to a single-roll magnetic separator. The liquid outlet of the magnetic separator is connected to the return port of the stirring emulsification kettle through a pipeline, forming a second circulating water circuit. Furthermore, a valve is set on the pipeline.

[0059] Furthermore, an impeller disperser can be added to the stirring emulsification kettle as needed to assist in dispersing the materials.

[0060] Furthermore, an ozone generator can be added to the stirring emulsification kettle as needed to deodorize and sterilize the waste cutting fluid.

[0061] Example 2

[0062] A method for treating solid waste in waste cutting fluid, taking bearing steel honing mud as an example:

[0063] Weigh 60 kg of bearing steel honing mud after filter pressing. Figure 2 As shown, the material is a fluffy, flocculent black solid with a water content of approximately 30-40%, a metallic content of approximately 50%, and a non-metallic content of approximately 10-20%. The metallic material is bearing steel shavings, appearing as strands 2-5 μm thick. The non-metallic material is primarily cutting fluid sludge adhering to the surface of the shavings during the grinding process, as well as trace Al2O3 and SiO2 particles dislodged from the grinding wheel during the grinding process.

[0064] The above materials were added to a stirring emulsification kettle through the feed port, followed by 280 L of water. A high-shear homogenizer was then started for homogenization. The homogenizer speed was set at 2600 rpm. The shear force of the fluid dispersed the clumps of solid matter while also separating the metal chips from the cutting fluid sludge. After 15 minutes of processing, the clumps of solid matter were dispersed, forming a suspension, with the metal chips and cutting fluid sludge suspended in the liquid.

[0065] The valve on the pipeline connecting the three-way outlet of the agitator emulsifier to the pneumatic diaphragm pump was opened, and the pneumatic diaphragm pump and ultrasonic transducer were activated to circulate the suspension and perform ultrasonic cavitation treatment at an ultrasonic power of 2400W. The cavitation effect of high-energy ultrasound further separated the metal chips from the cutting fluid sludge and also decomposed the cutting fluid sludge, causing it to redissolve. After 10 minutes of circulation, the suspension turned milky white, indicating redissolved cutting fluid sludge.

[0066] A small amount of the suspension is extracted and magnetically separated to remove iron filings, as shown in Figure 3. Composition analysis is then performed using an ICP spectrometer and an electric spark direct reading spectrometer. The test results are compared with the national standard GB4223-2004. If the recovered iron filings meet the standard, they proceed to the next step; otherwise, they continue to be recycled.

[0067] Close the valve on the pipeline connecting the three-way discharge port of the stirring emulsification kettle and the pneumatic diaphragm pump, open the valve on the pipeline connecting the three-way discharge port and the magnetic separator, and start the magnetic separator to magnetically separate and collect the iron chips to complete the recovery of the iron chips.

[0068] The remaining liquid flows back into the stirring emulsification kettle through the return port to complete the recovery of the waste cutting fluid.

[0069] Example 3

[0070] A method for treating solid waste in waste cutting fluid, taking brass honing mud as an example:

[0071] Weigh 50 kg of filtered brass honing sludge, which contains approximately 25-35% water, 50% metallic matter, and 10-20% non-metallic matter. The metallic matter consists of copper chips, 5-6 μm thick, in the form of strands. The non-metallic matter primarily consists of cutting fluid sludge adhering to the surface of the chips during the grinding process, as well as trace Al2O3 and SiO2 particles dislodged from the grinding wheel during the grinding process.

[0072] The above materials were added to a stirred emulsifying kettle through the feed port, followed by 200 L of water. A high-shear homogenizer was then started for homogenization. The homogenizer speed was set at 2700 rpm. The shear force of the fluid dispersed the clumps of solid matter while also separating the metal chips from the cutting fluid sludge. After 20 minutes of treatment, the clumps of solid matter were dispersed into a suspension, with the copper chips and cutting fluid sludge suspended in the liquid.

[0073] The valve on the pipeline connecting the three-way outlet of the agitator emulsifier to the pneumatic diaphragm pump was opened, and the pneumatic diaphragm pump and ultrasonic transducer were activated to circulate the suspension and perform ultrasonic cavitation treatment at an ultrasonic power of 3000W. The cavitation effect of high-energy ultrasound further separated the metal chips from the cutting fluid sludge and also decomposed the cutting fluid sludge, causing it to redissolve. After 10 minutes of circulation, the suspension turned milky white, indicating redissolution of the cutting fluid sludge.

[0074] A small amount of the suspension is extracted, and the copper scraps are separated by centrifuge. After drying, the scraps are analyzed for composition using an ICP spectrometer. The test results are compared with the national standard GB / T13587-2020. If the recovered copper scraps meet the standard, they proceed to the next step; if not, they continue to be recycled.

[0075] Close the valve on the pipeline connecting the three-way discharge port of the stirring emulsification kettle and the pneumatic diaphragm pump, open the valve on the pipeline connecting the three-way discharge port and the centrifuge, and start the centrifuge to centrifugally collect the copper chips to complete the recovery of the copper chips.

[0076] The remaining liquid flows back into the stirring emulsification kettle through the return port to complete the recovery of the waste cutting fluid.

[0077] Example 4

[0078] A method for recycling solid waste from spent cutting fluids involves collecting selected metal chips and feeding them into a track-mounted drying kiln for drying. The kiln temperature is adjustable from 50-400°C, the kiln length is 2.5m, and the conveying speed is adjustable from 0-1.0m / min.

[0079] The dried metal chips are cold pressed into shape in a cold pressing mold. The hydraulic press is a 200T three-beam four-column hydraulic press, with a mold cavity diameter of 50mm, a height of 150mm, a holding pressure of 150MPa, and a holding time of 3min. A φ50mm×80mm metal chip cold pressed blank is obtained. Figure 4 As shown in the figure, the cold pressed billets can be used as recycled materials in foundries.

[0080] Alternatively, the dried metal chips are fed into a jet mill for processing to produce a powder of about 60 μm. Physically crushed iron powder can be used as raw material for powder metallurgy.

[0081] The recovered waste liquid is purified, deodorized and sterilized and then returned to the factory for use as cutting fluid.

[0082] The embodiments described above provide a detailed description of the technical solutions of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, supplements or similar substitutions made within the scope of the principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A solid waste treatment device for waste cutting fluid, characterized in that: The invention comprises a stirring emulsification kettle, a high shear homogenizer, an ultrasonic cavitation device and a separation device; a feed port is provided on the top of the stirring emulsification kettle and is connected to the discharge port of the ultrasonic cavitation device, and a three-way discharge port is provided on the bottom, one of which is connected to the feed port of the ultrasonic cavitation device through a pneumatic diaphragm pump to form a circulating water circuit, and the other discharge port is connected to the separation device; the high shear homogenizer is provided above the stirring emulsification kettle; A wave-breaking plate and an ozone generator are arranged in the stirring emulsification kettle; The high shear homogenizer includes a motor, a drive shaft of the motor is connected to a coupling, a rotor and a stator working chamber are arranged at the bottom of the coupling; an impeller is arranged in the middle of the coupling; The lower part of the homogenizer consists of a high-speed rotating rotor and a stator working chamber. The rotor and stator are coaxial with a gap of 10-150μm. When the rotor rotates, negative pressure is formed in the working chamber, sucking in the material from the bottom and discharging it from the top. The ultrasonic cavitation device includes an ultrasonic emulsification tank, an ultrasonic converter and an amplitude rod. The ultrasonic converter is connected to the amplitude rod. The amplitude rod is arranged inside the ultrasonic emulsification tank. The amplitude rod adopts a gourd rod design. The minimum diameter of the amplitude rod is 30 mm, the maximum diameter is 50 mm, and the length is 480 mm. The solid waste in the waste cutting fluid is a mixture of tiny metal chips and cutting fluid sludge remaining in the cutting fluid during the metal material cutting process; The waste cutting fluid containing solid waste is subjected to filter pressing; Add the material into the stirred reactor and add water into the reactor, the ratio of material to water is 1:4-5; Turn on the high shear homogenizer and process for 10-20 minutes, controlling the speed at 2200-2700 r / min; Open the discharge port connecting the stirring emulsification kettle and the ultrasonic cavitation device, start the pneumatic diaphragm pump and ultrasonic transducer, circulate the suspension, and perform ultrasonic cavitation treatment at an ultrasonic power of 2000-3000 W; The suspension appears milky white. A small amount of suspension is extracted, metal chips are selected, and the composition is tested. If it meets the standard, the discharge port connecting the stirring emulsification kettle and the separation device is opened. If it does not meet the standard, the cycle treatment is continued. Turn on the magnetic separator, centrifuge or vibrating screen to collect the metal chips.

2. The solid waste treatment equipment in waste cutting fluid according to claim 1, characterized in that: The separation device is a single-roll magnetic separator, a centrifuge or a vibrating screen.

3. A method for treating solid waste in waste cutting fluid, which is achieved by using the solid waste treatment equipment for waste cutting fluid according to any one of claims 1 to 2, characterized in that: The following steps are involved: The waste cutting fluid containing solid waste is subjected to filter pressing; Add the material into the stirred reactor and add water into the reactor, the ratio of material to water is 1:4-5; Turn on the high shear homogenizer and process for 10-20 minutes, controlling the speed at 2200-2700 r / min; Open the discharge port connecting the stirring emulsification kettle and the ultrasonic cavitation device, start the pneumatic diaphragm pump and ultrasonic transducer, circulate the suspension, and perform ultrasonic cavitation treatment at an ultrasonic power of 2000-3000 W; The suspension appears milky white. A small amount of suspension is extracted, metal chips are selected, and the composition is tested. If it meets the standard, the discharge port connecting the stirring emulsification kettle and the separation device is opened. If it does not meet the standard, the cycle treatment is continued. Turn on the magnetic separator, centrifuge or vibrating screen to collect the metal chips.

4. The method for treating solid waste in waste cutting fluid according to claim 3, wherein: The waste liquid recovered by the magnetic separator, centrifuge or vibrating screen is purified, deodorized and sterilized and then returned to the factory for use as cutting fluid.

5. A method for resource utilization of solid waste in waste cutting fluid, wherein the metal chips obtained by the method of claim 3 are processed, characterized in that: The following steps are involved: The collected metal chips are sent to the track-type drying kiln for drying at a temperature of 200-400°C; The dried metal chips are cold pressed in a cold pressing mold with a holding pressure of 100-200 MPa and a holding time of 3-10 minutes to obtain metal chip cold pressed blanks for recycling.

6. The method for resource utilization of solid waste in waste cutting fluid according to claim 5, characterized in that: The dried metal chips are sent to the air flow mill for processing to obtain metal powder for recycling.

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