Oil mist purifier with oil-gas separation function

Abstract

According to the oil mist purifier with the oil-gas separation function, a cyclone coarse separation mechanism, a centrifugal separation mechanism and an electrostatic capture mechanism are sequentially arranged in a shell in the airflow moving direction, the cyclone coarse separation mechanism comprises a first air inlet channel and a cyclone generator, and a first oil collecting groove is formed in the bottom of the first air inlet channel; the cyclone generator is arranged in the first air inlet channel. The centrifugal separation mechanism comprises a rotating impeller and a second centrifugal cavity, the second centrifugal cavity is communicated with the first air inlet channel, the rotating impeller is arranged in the second centrifugal cavity in a pivoted mode, and a second oil collecting groove is formed in the bottom of the second centrifugal cavity; the electrostatic capture mechanism comprises an anode power grid, a cathode electric rod, a third adsorption chamber and a fan, the third adsorption chamber is communicated with the second centrifugal chamber, the fan is arranged in the third adsorption chamber, the anode power grid is arranged on the inner wall of the third adsorption chamber, and the cathode electric rod is arranged on the inner wall of the third adsorption chamber. The cathode electric rod is arranged in the center of the third adsorption chamber, and a third oil collecting tank is arranged at the bottom of the third adsorption chamber. The oil mist purifier with the oil-gas separation function, provided by the invention, has the advantages of small filtering load and less filter screen replacement.

Description

Technical Field

[0001] This invention relates to the field of oil mist purification technology, and in particular to an oil mist purifier with oil-gas separation function. Background Technology

[0002] Oil mist purifiers are environmental protection devices used to collect and purify pollutants such as oil mist, fumes, and dust generated in industrial production. They are widely used in industries such as machining (such as lathes, milling machines, and grinding machines), metal die casting, and heat treatment. They can improve workshop air quality, protect workers' health, and prevent oil mist from polluting equipment and the environment.

[0003] Currently, oil mist purifiers offer only one purification mode and lack multi-stage purification capabilities. This results in a higher load on the filtration system, increasing the frequency of filter replacement and consequently raising operating costs. Summary of the Invention

[0004] This invention is based on the inventors' discovery and understanding of the following facts and problems: air purifiers have a single purification mode, leading to a high load on the filtration section. This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, embodiments of this invention propose an oil mist purifier with oil-gas separation function, which has the advantages of low filtration load and infrequent filter replacement.

[0005] According to an embodiment of the present invention, an oil mist purifier with oil-gas separation function comprises a cyclone coarse separator, a centrifugal separator, and an electrostatic capture mechanism arranged sequentially along the airflow direction within the housing. The cyclone coarse separator includes a first air inlet channel and a cyclone generator. A first oil collection tank is provided at the bottom of the first air inlet channel, and the cyclone generator is arranged within the first air inlet channel. The centrifugal separator includes a rotating impeller and a second centrifugal chamber. The second centrifugal chamber is connected to the first air inlet channel, and the rotating impeller is pivotally arranged within the second centrifugal chamber. A second oil collection tank is provided at the bottom of the second centrifugal chamber. The electrostatic capture mechanism includes an anode grid, a cathode electrode, a third adsorption chamber, and a fan. The third adsorption chamber is connected to the second centrifugal chamber, and the fan is arranged within the third adsorption chamber. The anode grid is arranged on the inner wall of the third adsorption chamber, and the cathode electrode is arranged in the center of the third adsorption chamber. A third oil collection tank is provided at the bottom of the third adsorption chamber.

[0006] The oil mist purifier with oil-gas separation function according to embodiments of the present invention has the advantages of low filtration load and infrequent filter replacement. This application has the following advantages: it improves oil mist purification efficiency, realizes oil resource recycling and reuse, reduces filter replacement frequency, lowers operating costs, effectively improves air quality in industrial workshops, protects worker health, and avoids oil mist pollution of equipment and the environment.

[0007] In some embodiments, the cross-sectional area of ​​the first end of the first air intake channel is larger than the cross-sectional area of ​​the second end of the first air intake channel, and a plurality of parallel guide grooves are provided on the inner wall of the first air intake channel, the guide grooves being connected to the first oil collection groove.

[0008] In some embodiments, the cyclone generator includes a spiral guide vane extending along the axial direction of the first air intake channel and a first drive member, wherein the pitch and blade diameter of the spiral guide vane gradually decrease in the airflow direction, and the first drive member is drivenly connected to the spiral guide vane.

[0009] In some embodiments, the rotating impeller includes a rotating frame, blades, and a second drive component. The blades rotate about the axis of the rotating frame, which is rotatable within a second centrifugal chamber in the direction of airflow. The second drive component is connected to the rotating frame in a transmission manner. The blades are deflected relative to the axis of the rotating frame by 15° to 45°.

[0010] In some embodiments, the third adsorption chamber includes an adsorption chamber and an exhaust chamber. The axial direction of the adsorption chamber is perpendicular to the axial direction of the exhaust chamber. The fan is arranged inside the exhaust chamber. An air baffle is arranged inside the adsorption chamber to divide the adsorption chamber into two sub-chambers. The inner walls of both sub-chambers of the adsorption chamber are provided with the anode grid, and two cathode electrodes are respectively arranged in the center of the two sub-chambers. The two sub-chambers are connected to the exhaust chamber.

[0011] In some embodiments, the inner wall surface of the second centrifuge chamber is coated with a superhydrophobic coating.

[0012] In some embodiments, a condensation mechanism is further included, the condensation mechanism including a condensation chamber and a plurality of cooling plates, the condensation chamber being arranged between the exhaust chamber and the adsorption chamber and communicating with the exhaust chamber and the adsorption chamber respectively, and the plurality of cooling plates being arranged on the outer wall of the condensation chamber.

[0013] In some embodiments, a second air intake channel is further included, which is arranged at the air intake end of the first air intake channel. The diameter of the second air intake channel is adjustable, and a screen is provided between the second air intake channel and the first air intake channel.

[0014] In some embodiments, a flow guide is provided in the second air intake channel. The inner wall of the flow guide is provided with a spiral guide rib and a flow guide hole. The axial direction of the flow guide is coaxial with the first air intake channel. The sludge collection box is detachably arranged on the side wall of the flow guide and connected to the flow guide through the flow guide hole.

[0015] In some embodiments, the first oil collection tank, the second oil collection tank, and the third oil collection tank are connected in series via a guide pipe, a one-way valve is provided on the guide pipe, and the guide pipe is connected to the oil collection tank. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of an oil mist purifier with oil-gas separation function according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the cyclone coarse separation mechanism and the electrostatic capture mechanism of an oil mist purifier with oil-gas separation function according to an embodiment of the present invention.

[0018] Figure 3 yes Figure 2 A structural diagram from another angle.

[0019] Figure 4 This is a schematic diagram showing the position of the cyclone coarse separator in an oil mist purifier with oil-gas separation function according to an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the structure of a cyclone generator for an oil mist purifier with oil-gas separation function according to an embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of the rotating impeller of an oil mist purifier with oil-gas separation function according to an embodiment of the present invention.

[0022] Figure 7 This is a schematic diagram of the structure of the third adsorption chamber of an oil mist purifier with oil-gas separation function according to an embodiment of the present invention.

[0023] Figure 8 This is a schematic diagram showing the positions of the cathode electrode and anode grid of an oil mist purifier with oil-gas separation function according to an embodiment of the present invention.

[0024] Figure 9 This is a schematic diagram of the condensation mechanism of an oil mist purifier with oil-gas separation function according to an embodiment of the present invention. Reference numerals: 1. Cyclone coarse separation mechanism; 101. First air inlet channel; 1011. Guide channel; 102. Cyclone generator; 1021. First driving component; 1022. Spiral guide vane; 103. First oil collection tank; 2. Centrifugal separation mechanism; 201. Rotating impeller; 2011. Rotating frame; 2012. Blade; 2013. Second driving component; 202. Second centrifugal chamber; 203. Second oil collection tank; 3. Electrostatic capture mechanism; 301. Third adsorption chamber; 3011. Adsorption chamber; 30111. Separation chamber; 30113. Baffle plate; 3012. Exhaust chamber; 302. Fan; 303. Anode grid; 304. Cathode electrode; 305. Third oil collection tank; 4. Condensation mechanism; 401. Condensation chamber; 402. Cooling plate; 5. Screen. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] According to an embodiment of the present invention, an oil mist purifier with oil-gas separation function has a cyclone coarse separation mechanism 1, a centrifugal separation mechanism 2 and an electrostatic capture mechanism 3 arranged sequentially in the housing along the airflow direction. The cyclone coarse separation mechanism 1 includes a first air intake channel 101 and a cyclone generator 102. A first oil collection tank 103 is provided at the bottom of the first air intake channel 101, and the cyclone generator 102 is arranged in the first air intake channel 101. The centrifugal separation mechanism 2 includes a rotating impeller 201 and a second centrifugal chamber 202. The second centrifugal chamber 202 is connected to the first air inlet channel 101. The rotating impeller 201 is pivotally arranged inside the second centrifugal chamber 202. A second oil collection tank 203 is provided at the bottom of the second centrifugal chamber 202. The electrostatic capture mechanism 3 includes an anode grid 303, a cathode rod 304, a third adsorption chamber 301, and a fan 302. The third adsorption chamber 301 is connected to the second centrifugal chamber 202. The fan 302 is arranged inside the third adsorption chamber 301. The anode grid 303 is arranged on the inner wall of the third adsorption chamber 301. The cathode rod 304 is arranged in the center of the third adsorption chamber 301. A third oil collection tank 305 is provided at the bottom of the third adsorption chamber 301. The cyclone coarse separation mechanism 1, the centrifugal separation mechanism 2, and the electrostatic capture mechanism 3 form a three-stage progressive purification system, which specifically separates oil mist particles of different sizes, effectively solving the problems of single purification mode and high filtration load in traditional purifiers. The first air intake channel 101 provides a stable flow path for the airflow, and the first oil collection tank 103 at the bottom collects the initially separated oil droplets, preventing oil mist from directly entering subsequent units and increasing processing pressure. The cyclone generator 102 generates centrifugal force through rotation, separating large-diameter oil mist particles (>10μm) from the airflow, achieving preliminary oil-gas separation and reducing the purification load of the subsequent centrifugal separation mechanism 2. The second centrifugal chamber 202 is connected to the first air intake channel 101, ensuring that the pre-purified airflow can enter smoothly. The rotating impeller 201 can rotate at high speed in the chamber, generating strong centrifugal force to throw medium-diameter oil mist particles (5-10μm) towards the chamber wall. The second oil collection tank 203 at the bottom collects these oil droplets in time, further reducing the amount of oil mist entering the electrostatic capture mechanism 3 and reducing the workload of the electrostatic capture unit. The third adsorption chamber 301 is connected to the second centrifugal chamber 202 to ensure continuous airflow. The anode grid 303 arranged on the inner wall and the cathode rod 304 in the center form an electric field, causing the tiny oil mist particles (1-5μm) to undergo electrophoretic reaction and aggregate under the action of the electric field. The third oil collection tank 305 at the bottom collects the aggregated oil droplets, realizing deep separation of oil and gas. The fan 302 arranged in the third adsorption chamber 301 can provide power for the airflow, ensuring that the purified gas is discharged smoothly, and at the same time assisting the oil mist particles to move towards the oil collection tank.

[0027] The oil mist purifier with oil-gas separation function according to embodiments of the present invention has the advantages of highly efficient oil mist purification and resource recovery. This application has the following advantages: it improves oil mist purification efficiency, realizes oil resource recovery and reuse, reduces filter replacement frequency, lowers operating costs, effectively improves air quality in industrial workshops, protects worker health, and avoids oil mist pollution of equipment and the environment. In some embodiments, the cross-sectional area of ​​the first end of the first air intake channel 101 is larger than the cross-sectional area of ​​the second end of the first air intake channel 101, and a plurality of parallel guide grooves 1011 are provided on the inner wall of the first air intake channel 101, and the guide grooves 1011 are connected to the first oil collection groove 103.

[0028] Specifically, the constricted structure design with a larger cross-sectional area at the first end than at the second end allows the oil mist airflow entering the channel to gradually increase its velocity and maintain a rotating state during flow. Combined with the centrifugal force generated by the cyclone generator 102, it can more efficiently throw large-diameter oil mist particles (>10μm) towards the inner wall of the channel, reducing the pressure loss of the airflow within the channel and ensuring a stable and efficient initial oil-gas separation process. Multiple parallel guide grooves 1011 on the inner wall of the first air intake channel 101 guide the oil droplets adhering to the inner wall, preventing them from flowing randomly or remaining on the inner wall. This allows the oil droplets to smoothly collect along the guide grooves 1011 into the connected first oil collection tank 103, ensuring the cleanliness of the inner wall of the first air intake channel 101, preventing secondary mixing of oil droplets into the airflow and affecting subsequent purification effects, and improving the oil recovery efficiency in the oil mist, further reducing the processing load of the subsequent centrifugal separation mechanism 2.

[0029] In some embodiments, the cyclone generator 102 includes a spiral guide vane 1022 extending along the axial direction of the first air intake channel 101 and a first drive member 1021. The pitch of the spiral guide vane 1022 and the diameter of the blade 2012 gradually decrease in the direction of airflow. The first drive member 1021 is connected to the spiral guide vane 1022 in a driving connection.

[0030] Specifically, in the cyclone generator 102, the spiral guide vane 1022 extending axially along the first air intake channel 101 is in transmission cooperation with the first driving member 1021. The first driving member 1021 can provide stable rotational power for the spiral guide vane 1022 to ensure its continuous and efficient operation. The spiral guide vane 1022 adopts a design where the pitch and blade diameter 2012 gradually decrease along the airflow direction. On the one hand, this gradual structure can be adapted to the constricted structure of the first air intake channel 101, allowing the airflow to better conform to the surface of the guide vane when flowing in the channel. This fully utilizes the centrifugal force generated by the rotation of the guide vane to more accurately separate large-diameter oil mist particles (>10μm) from the airflow, improving the initial separation efficiency. On the other hand, the gradual reduction in pitch and blade diameter guides the airflow velocity to change smoothly, avoiding secondary diffusion of oil mist particles due to sudden changes in velocity. At the same time, it reduces the flow resistance of the airflow in the channel, reduces pressure loss, and ensures the stability of the entire cyclone coarse separation process. This reduces the processing load on the subsequent centrifugal separation mechanism 2 and electrostatic capture mechanism 3, ensuring the continuous and efficient operation of the entire purifier. In some embodiments, the rotating impeller 201 includes a rotating frame 2011, blades 2012, and a second drive member 2013. Multiple blades 2012 rotate about the axis of the rotating frame 2011. The rotating frame 2011 can rotate within the second centrifugal chamber 202 about the direction of airflow. The second drive member 2013 is connected to the rotating frame 2011 in a transmission connection. The blades 2012 are deflected relative to the axis of the rotating frame 2011 by 15° to 45°.

[0031] Specifically, the rotating impeller 201, through the coordinated design of the rotating frame 2011, blades 2012, and the second drive component 2013, forms a highly efficient centrifugal separation core structure. The second drive component 2013 is connected to the rotating frame 2011, providing stable and high-speed rotational power to ensure that the rotating frame 2011 can continuously rotate within the second centrifugal chamber 202 about the direction of airflow. Multiple blades 2012 are arranged in a ring array about the axis of rotation of the rotating frame 2011. This arrangement allows the blades 2012 to form a uniform and wide-ranging centrifugal force field during rotation, ensuring that the airflow entering the second centrifugal chamber 202 can fully contact the blades 2012. The blades 2012 are deflected at an angle of 15° to 45° relative to the axis of the rotating frame 2011. This deflection angle can prevent the airflow from passing directly through the gap between the blades 2012, which would lead to insufficient separation. At the same time, the blades 2012 can enhance the capture and separation effect of medium-sized oil mist particles (5-10μm) in the airflow by reasonably guiding and disturbing the airflow. This makes it easier for these oil mist particles to be thrown towards the wall of the second centrifugal chamber 202 under the action of centrifugal force, and then flow into the second oil collection tank 203 through the subsequent collection structure. This effectively improves the separation efficiency of medium-sized oil mist particles, and at the same time further reduces the oil mist load entering the electrostatic capture mechanism 3, providing efficient secondary separation guarantee for the multi-stage purification process of the entire purifier.

[0032] In some embodiments, the third adsorption chamber 301 includes an adsorption chamber 3011 and an exhaust chamber 3012. The axial direction of the adsorption chamber 3011 is perpendicular to the axial direction of the exhaust chamber 3012. A fan 302 is arranged in the exhaust chamber 3012. An air baffle 30113 is arranged in the adsorption chamber 3011 to divide the adsorption chamber 3011 into two sub-chambers 30111. An anode grid 303 is arranged on the inner wall of each of the two sub-chambers 30111, and two cathode rods 304 are respectively arranged in the center of the two sub-chambers 30111. The two sub-chambers 30111 are connected to the exhaust chamber 3012.

[0033] Specifically, the third adsorption chamber 301, through the vertical axis design of the adsorption chamber 3011 and the exhaust chamber 3012, the partition structure of the baffle plate 30113, and the symmetrical arrangement of the electrodes, constructs a highly efficient micro-oil mist particle capture system. The axes of the adsorption chamber 3011 and the exhaust chamber 3012 are perpendicular to each other, which not only prolongs the residence time of the airflow in the adsorption chamber 3011, allowing the micro-oil mist particles (1-5μm) to have more time and electric field action, but also, with the help of the directional airflow generated by the fan 302 in the exhaust chamber 3012, guides the gathered oil droplets to flow to the third oil collection tank 305 under the combined action of gravity and airflow, preventing the oil droplets from being discharged with the purified gas. The baffle plate 30113 inside the adsorption chamber 3011 divides it into two independent sub-chambers 30111. This design allows the airflow to be evenly distributed in each sub-chamber after being diverted, which greatly increases the contact area between the airflow and the electrode and avoids the purification dead zone caused by uneven airflow distribution in a single chamber. At the same time, the two sub-chambers 30111 can perform electrostatic capture operations simultaneously, improving the purification efficiency per unit time. Both chambers 30111 have an anode grid 303 on their inner walls and a cathode rod 304 in the center, which can form a uniform and stable electric field in each chamber. This allows the tiny oil mist particles entering the chambers 30111 to undergo a rapid electrophoretic reaction in the electric field. The charged oil mist particles will migrate directionally to the anode grid 303 and accumulate. Then, under the action of gravity, they will drip into the third oil collection tank 305, achieving deep separation of oil and gas. Finally, the two chambers 30111 are connected to the exhaust chamber 3012 to ensure that the purified gas can be discharged in a concentrated manner. Through multi-dimensional optimization design, the entire structure not only ensures a high capture rate of tiny oil mist particles, but also improves the stability and efficiency of the purification process, further reducing the overall operating load of the purifier.

[0034] In some embodiments, the inner wall surface of the second centrifuge chamber 202 is coated with a superhydrophobic coating.

[0035] Specifically, coating the inner wall surface of the second centrifuge chamber 202 with a superhydrophobic coating is a key optimized design for the oil droplet collection stage after centrifugation, and has multiple technical advantages. From the perspective of separation efficiency, under high-speed centrifugation, medium-sized oil mist particles (5-10μm) are thrown towards the inner wall of the chamber. The superhydrophobic coating can significantly reduce the adhesion between oil droplets and the chamber wall, preventing oil droplets from remaining, accumulating, or forming an oil film on the wall. This ensures that oil droplets can quickly slide off under gravity and smoothly flow into the second oil collection tank 203 at the bottom, reducing the risk of oil droplets being mixed into the airflow again and further improving the thoroughness of oil mist separation. From the perspective of equipment maintenance and lifespan, the superhydrophobic coating can effectively isolate the oil and impurities in the oil mist from direct contact with the inner wall of the chamber, preventing the inner wall from being corroded or contaminated by oil, reducing the frequency of chamber cleaning and maintenance difficulty, reducing equipment failures caused by inner wall contamination, and extending the service life of the second centrifugal chamber 202. At the same time, the presence of the coating can also maintain the smoothness of the inner wall of the chamber, reduce the flow resistance of the airflow in the chamber, avoid airflow turbulence caused by rough walls or oil adhesion, ensure the stability of the centrifugal separation process, and continuously provide a low-load airflow to be purified for the subsequent electrostatic capture mechanism 3, helping the entire purifier maintain a high-efficiency operating state.

[0036] In some embodiments, a condensation mechanism 4 is also included. The condensation mechanism 4 includes a condensation chamber 401 and a plurality of cooling plates 402. The condensation chamber 401 is arranged between the exhaust chamber 3012 and the adsorption chamber 3011 and is connected to the exhaust chamber 3012 and the adsorption chamber 3011 respectively. The plurality of cooling plates 402 are arranged on the outer wall of the condensation chamber 401.

[0037] Specifically, the addition of a condensation mechanism 4 to the oil mist purifier is a crucial supplement for purifying tiny oil mist particles (especially aerosol oil mist <1μm), and its structural design and functional implementation are highly compatible with the overall purification process. The condensation mechanism 4 includes a condensation chamber 401 connected between the exhaust chamber 3012 and the adsorption chamber 3011, allowing the airflow after electrostatic capture by the adsorption chamber 3011 to first flow through the condensation chamber 401, forming a dual deep purification process of "electrostatic capture + condensation," thus filling the gap in the low capture rate of ultra-tiny oil mist particles in traditional single purification modes. Multiple cooling plates 402 are arranged on the outer wall of the condensation chamber 401, which can quickly reduce the internal temperature of the condensation chamber 401 through heat conduction, causing the ultra-tiny oil mist particles remaining in the airflow to quickly condense into larger droplets upon cooling. These droplets can easily drip into the third oil collection tank 305 under gravity for collection, while also preventing them from being discharged with the purified gas and causing secondary pollution. Meanwhile, the interconnected design of the condensation chamber 401 with the exhaust chamber 3012 and the adsorption chamber 3011 ensures that the airflow can flow smoothly in the purification path without additional turning, reducing airflow resistance and pressure loss. Combined with the power of the fan 302 in the exhaust chamber 3012, it ensures the stability of the overall airflow. In addition, the addition of the condensation mechanism 4 can further reduce the load on any subsequent filter units (if any), reduce the frequency of consumable replacement, reduce equipment maintenance costs from a long-term use perspective, and improve the cleanliness of the final exhaust gas, which is more in line with the strict environmental emission requirements of industrial scenarios.

[0038] In some embodiments, a second air intake channel is further included, which is arranged at the air intake end of the first air intake channel 101. The diameter of the second air intake channel is adjustable, and a screen is provided between the second air intake channel and the first air intake channel 101.

[0039] Specifically, a second air intake channel is added to the air intake end of the first air intake channel 101, and it is designed with an adjustable diameter structure. A screen is also installed between the two. This design optimizes the overall performance of the purifier from both the aspects of airflow control and pretreatment. The adjustable diameter second air intake channel can flexibly adjust the airflow velocity and air volume according to the actual oil mist concentration: when the oil mist concentration in the workshop is high, the channel diameter can be increased to increase the air volume and avoid oil mist accumulation on the outside; when the oil mist concentration is low, the channel diameter can be reduced to increase the airflow velocity, ensuring that the subsequent cyclone coarse separation mechanism 1 can give full play to the centrifugal separation function, avoiding the inability to effectively separate large-diameter oil mist particles due to excessively low flow velocity, and realizing adaptability adjustment under different working conditions. The screen between the second air intake channel and the first air intake channel 101 can perform preliminary filtration before the oil mist enters the core separation unit, effectively intercepting large solid impurities (20-100μm) such as metal cutting chips and abrasive dust mixed in the oil mist. This prevents these impurities from entering precision components such as the cyclone generator 102 and the rotating impeller 201, causing wear or blockage and extending the service life of the equipment. It also avoids impurities from mixing with the oil mist and affecting the efficiency of subsequent oil-gas separation, providing a cleaner airflow for the cyclone coarse separation mechanism 1, indirectly reducing the load on subsequent separation units and ensuring the continuous and stable operation of the entire purification system.

[0040] In some embodiments, a flow guide is provided in the second air intake channel. The inner wall of the flow guide is provided with a spiral guide rib and a flow guide hole. The axial direction of the flow guide is coaxial with the first air intake channel 101. The sludge collection box is detachably arranged on the side wall of the flow guide and connected to the flow guide through the flow guide hole.

[0041] Specifically, a guide vane coaxial with the first air intake channel 101 is installed in the second air intake channel. The spiral guide ribs on the inner wall of the guide vane guide the incoming oil mist airflow to form a stable vortex, pre-accelerating and pre-separating the oil mist in advance. This causes some large particles of impurities and oil droplets to be thrown against the inner wall of the guide vane under centrifugal force, and then smoothly flow into the detachable collection box through the guide holes. This structural design not only achieves pre-treatment of oil mist before it enters the core separation unit, effectively reducing the processing load of the subsequent screen and cyclone coarse separation mechanism 1, and preventing large particles of impurities from clogging the core components or affecting the separation efficiency, but also makes it easier to clean solid impurities and pre-separated oil sludge because the collection box is detachable, without disassembling the entire air intake channel, reducing maintenance difficulty and downtime. The coaxial arrangement of the guide vane with the first air intake channel 101 ensures smooth airflow and avoids airflow turbulence or excessive pressure loss due to structural abruptness, further improving the operational stability and purification efficiency of the entire purifier.

[0042] In some embodiments, the first oil collection tank 103, the second oil collection tank 203 and the third oil collection tank 305 are connected in series by a guide pipe, a one-way valve is provided on the guide pipe, and the guide pipe is connected to the oil collection tank.

[0043] Specifically, the first oil collection tank 103, the second oil collection tank 203, and the third oil collection tank 305 are connected in series and linked to the oil collection tank via a guide pipe. A one-way valve is installed on the guide pipe. This structural design enables centralized collection and management of oil from multiple oil collection tanks, significantly improving the convenience of oil recovery. The oil collected from each tank automatically flows to the oil collection tank via the guide pipe, eliminating the need to disassemble and clean each tank separately, reducing maintenance frequency and operational steps, and lowering labor costs. The one-way valve on the guide pipe effectively prevents backflow of oil from the oil collection tank due to equipment vibration, airflow disturbance, or liquid level difference, avoiding secondary mixing of backflowing oil into the separation chambers and affecting the purification effect, ensuring that each separation unit is always in a clean working environment. The centralized oil collection tank design also facilitates unified storage, transfer, and reuse of the recovered oil, improving resource recovery efficiency. It also avoids the sealing failure problems that may occur with frequent disassembly of dispersed oil collection tanks, ensuring the sealing and stability of the equipment operation, and further optimizing the overall user experience of the purifier.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. An oil mist purifier with oil-gas separation function, characterized in that, include: The casing contains a cyclone coarse separator, a centrifugal separation mechanism, and an electrostatic capture mechanism arranged sequentially along the airflow direction. The cyclone coarse separator includes a first air intake channel and a cyclone generator. A first oil collection tank is provided at the bottom of the first air intake channel, and the cyclone generator is arranged inside the first air intake channel. The centrifugal separation mechanism includes a rotating impeller and a second centrifugal chamber. The second centrifugal chamber is connected to the first air intake channel, and the rotating impeller is pivotally arranged inside the second centrifugal chamber. A second oil collection tank is provided at the bottom of the second centrifugal chamber. The electrostatic capture mechanism includes an anode grid, a cathode electrode, a third adsorption chamber, and a fan. The third adsorption chamber is connected to the second centrifugal chamber, and the fan is arranged inside the third adsorption chamber. The anode grid is arranged on the inner wall of the third adsorption chamber, and the cathode electrode is arranged in the center of the third adsorption chamber. A third oil collection tank is provided at the bottom of the third adsorption chamber.

2. The oil mist purifier with oil-gas separation function according to claim 1, characterized in that, The cross-sectional area of ​​the first end of the first air intake channel is larger than the cross-sectional area of ​​the second end of the first air intake channel. A plurality of parallel guide grooves are provided on the inner wall of the first air intake channel, and the guide grooves are connected to the first oil collection groove.

3. The oil mist purifier with oil-gas separation function according to claim 1, characterized in that, The cyclone generator includes a spiral guide vane extending along the axial direction of the first air intake channel and a first driving member. The pitch and blade diameter of the spiral guide vane gradually decrease in the airflow direction, and the first driving member is drivenly connected to the spiral guide vane.

4. The oil mist purifier with oil-gas separation function according to claim 1, characterized in that, The rotating impeller includes a rotating frame, blades, and a second drive component. Multiple blades rotate about the axis of the rotating frame, which can rotate within a second centrifugal chamber in the direction of airflow. The second drive component is connected to the rotating frame in a transmission manner. The blades are deflected relative to the axis of the rotating frame by 15° to 45°.

5. The oil mist purifier with oil-gas separation function according to claim 1, characterized in that, The third adsorption chamber includes an adsorption chamber and an exhaust chamber. The axis of the adsorption chamber is perpendicular to the axis of the exhaust chamber. The fan is arranged inside the exhaust chamber. An air baffle is arranged inside the adsorption chamber to divide the adsorption chamber into two sub-chambers. The inner walls of both sub-chambers of the adsorption chamber are equipped with the anode grid, and two cathode electrodes are respectively arranged in the center of the two sub-chambers. The two sub-chambers are connected to the exhaust chamber.

6. The oil mist purifier with oil-gas separation function according to claim 1, characterized in that, The inner wall surface of the second centrifuge chamber is coated with a superhydrophobic coating.

7. The oil mist purifier with oil-gas separation function according to claim 1, characterized in that, It also includes a condensation mechanism, which includes a condensation chamber and a plurality of cooling plates. The condensation chamber is arranged between the exhaust chamber and the adsorption chamber and is connected to the exhaust chamber and the adsorption chamber respectively. The plurality of cooling plates are arranged on the outer wall of the condensation chamber.

8. The oil mist purifier with oil-gas separation function according to claim 1, characterized in that, It also includes a second air intake channel, which is arranged at the air intake end of the first air intake channel. The diameter of the second air intake channel is adjustable, and a screen is provided between the second air intake channel and the first air intake channel.

9. The oil mist purifier with oil-gas separation function according to claim 8, characterized in that, A flow guide is provided in the second air intake channel. The inner wall of the flow guide is provided with spiral guide ribs and flow guide holes. The axial direction of the flow guide is coaxial with the first air intake channel. The sludge collection box is detachably arranged on the side wall of the flow guide and is connected to the flow guide through the flow guide holes.

10. The oil mist purifier with oil-gas separation function according to claim 1, characterized in that, The first oil collection tank, the second oil collection tank, and the third oil collection tank are connected in series via a guide pipe. A one-way valve is installed on the guide pipe, and the guide pipe is connected to the oil collection tank.

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