TWI735335B - Oil mist filtration apparatus - Google Patents

Abstract

An oil mist filtration apparatus comprises a first oil droplet filter apparatus, a second oil droplet filter apparatus and an oil gas filtration device. The first oil droplet filter apparatus separates the oil droplets in the oil-containing mist gas to generate the first filtered gas. The second oil droplet filter apparatus uses separates the remaining oil droplets in the first filtered gas to produce the second filtered gas. The oil gas filtration device converts the second filtered gas into bubbles and injects the bubbles into the solution to filter the oil gas in the second filtered gas. The diameter range of the oil droplets separated by the first oil droplet filter apparatus and the second oil droplet filter apparatus are different. Thereby, the oil mist filtration device can effectively filter oil gas to obtain clean and oil-free gas.

Description

Oil mist filtration equipment

The invention relates to a filtering device, in particular to an oil mist filtering device.

The use of cutting oil in machinery factories is very common. Cutting oil can be used for surface lubrication in the machining process, and can also be used to remove metal chips from the machined surface and eliminate the heat generated during the machining process. Because a large amount of cutting oil is used, cutting oil mist will be generated during the machining process. If cutting oil mist is inhaled by the human body, it will endanger human health.

Generally speaking, the way to filter cutting oil mist is to use filters, static electricity, centrifugal and other methods. However, these methods can only remove particulate oil mist droplets. In addition, for volatile oil and gas in the molecular state (d<0.01μm), the purification effect of filters, static electricity, centrifugation and other methods is limited.

How to filter the cutting oil mist more effectively and obtain clean and oil-free gas is one of the problems to be solved urgently by those skilled in the art.

Therefore, the main purpose of the present invention is to provide an oil mist filtering device to solve the above-mentioned problems.

The purpose of the present invention is to provide an oil mist filtering device, which can effectively filter oil and gas and obtain clean and oil-free gas.

In order to achieve at least one of the advantages or other advantages, an implementation of the present invention An example of an oil mist filtering device is presented. The oil mist filtering equipment includes a first oil droplet filtering device, a second oil droplet filtering device and an oil and gas filtering device.

The first oil droplet filtering device receives an oil-containing mist gas and separates the oil droplets in the oil-containing mist gas to generate a first filtered gas.

The second oil droplet filtering device receives the first filtered gas and separates the remaining oil droplets in the first filtered gas to generate a second filtered gas, wherein the first oil droplet filtering device and the second oil droplet The oil droplets separated by the filter have different diameter ranges.

The oil and gas filtering device receives the second filtered gas and converts the second filtered gas into bubbles and injects it into a second solution to filter the oil and gas in the second filtered gas to generate a third filtered gas.

In some embodiments, the first oil droplet filtering device is an inertial force separating device that separates the oil droplets in the oil-containing mist gas by inertial force.

In some embodiments, the inertial force separation device may include a first cavity and a first air inlet pipe. The first cavity system is used to contain a first solution. The outer side of the cavity extends into the first cavity for guiding the oil-containing mist gas to the surface of the first solution to separate the oil droplets in the oil-containing mist gas.

In some embodiments, the first oil droplet filter device is a filter device.

In some embodiments, the second oil droplet filtering device is a centrifugal force separating device that separates the remaining oil droplets in the first filtered gas by centrifugal force.

In some embodiments, the centrifugal force separation device may include a cyclone separator, an inlet end of the cyclone separator is disposed in the first cavity to extract the first filtered gas, and the cyclone separator filters out the first filtered gas. The remaining oil droplets in a filtered gas to produce the second pass The second filtered gas is discharged from an outlet end of the cyclone separator.

In some embodiments, the oil and gas filter device may include a second cavity, a second air inlet pipe, a bubble generator, and an air outlet. The second cavity system is used to contain the second solution, and the second cavity The inlet pipe extends from the outlet end of the cyclone separator to the second cavity for transferring the second filtered gas to the bubble generator, and the bubble generator is used for transforming the second filtered gas Inject bubbles into the second solution to filter out the oil and gas in the second filtered gas to generate the third filtered gas, the gas outlet is located on the second cavity, and the third filtered gas system is discharged from the gas outlet .

In some embodiments, the oil and gas filtering device may further include a first tubular structure and a second tubular structure. The first tubular structure is located in the second cavity and communicates with the second air inlet pipe through the bubble generator. , The first tubular structure extends downward from a first height position in the second cavity to a second height position in the second cavity, and the second tubular structure extends from the first height position in the second cavity The two height positions extend up to at least the first height position in the second cavity and are located below the air outlet, wherein the fluid flow distance defined by the first tubular structure is greater than the first height position and the first height position One of the vertical distances between two height positions.

In some embodiments, the oil and gas filtering device may further include a defoaming unit and a defoaming unit. The defoaming unit is disposed in the second tubular structure and above the second solution. The defoaming unit is disposed In the second tubular structure and immersed in the second solution.

In some embodiments, the first tubular structure includes a bent tube structure, a coiled tube structure, or a spiral tube structure.

In some embodiments, the bubble generator includes a porous structure.

In some embodiments, the oil and gas filtering device may further include a fluid circulation unit. Element for pumping the second solution at the second height position into the bubble generator.

In some embodiments, the oil and gas filtering device may further include a spray pump for pumping the second solution at the second height position to above the second tubular structure, and then spraying on the second tubular structure Upper end.

Therefore, using the oil mist filtering device provided by the present invention, the first oil droplet filtering device separates the oil droplets in the oil and gas, and then the second oil droplet filtering device separates the remaining oil droplets in the oil and gas. Finally, the oil and gas The setting of the filter device to filter the molecular oil and gas in the oil and gas can obtain clean and oil-free gas, improve the working effect of oil mist filtering equipment to separate oil and gas, avoid environmental pollution, and effectively protect human health.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented in accordance with the content of the specification, and in order to make the above and other objectives, features and advantages of the present invention more obvious and understandable. In the following, the preferred embodiments are specially cited, combined with the drawings, and the detailed description is as follows.

10: Oil mist filtration equipment

100: The first oil droplet filter device

200: The second oil droplet filter device

300: Oil and gas filtration device

120: first cavity

140: The first intake pipe

220: entrance side

240: Exit

260: High-speed fan

280: Cyclone Separator

290: oil reservoir

295: Tube Body

310: second cavity

320: second intake pipe

330: Bubble Generator

332: Shell

335: Porous structure

340: The first tubular structure

350: second tubular structure

360: foam breaking unit

370: Defoaming unit

375: fluid circulation unit

380: Spray pump

390: vent

395: heater

L1: the first solution

L2: second solution

H1: The first height position

H2: second height position

h: vertical distance

The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to exemplify the embodiments of the present application, and together with the text description, explain the principle of the present application. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the schema:

[Figure 1] is a schematic flow diagram of the oil mist filtering device of the present invention for filtering gas containing oil mist.

[Figure 2] is a three-dimensional schematic diagram of an embodiment of the oil mist filter device of the present invention.

[Fig. 3] is a schematic front view of Fig. 2.

[Fig. 4] is a schematic cross-sectional view of the bubble generator of Fig. 3.

The specific structure and functional details disclosed herein are only representative, and are used for the purpose of describing exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and should not be construed as being limited only to the embodiments set forth herein.

In the description of the present invention, it should be understood that the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", The directions or positions indicated by "bottom", "inner", and "outer" are based on the positions or positions shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not indicative or implied. The device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, the term "including" and any variations thereof is intended to cover non-exclusive inclusion.

In the description of the present invention, it should be noted that the terms "installed", "connected", and "connected" should be understood in a broad sense unless otherwise clearly specified and limited. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present invention can be understood in specific situations.

The terminology used herein is only for describing specific embodiments and not intended Limiting exemplary embodiments. Unless the context clearly dictates otherwise, the singular forms "a" and "one" used herein are also intended to include the plural. It should also be understood that the terms "including" and/or "comprising" used herein specify the existence of the stated features, integers, steps, operations, units and/or components, and do not exclude the existence or addition of one or more Other features, integers, steps, operations, units, components, and/or combinations thereof.

Please refer to FIG. 1, which is a schematic diagram of the process of filtering oil mist-containing gas by the oil mist filter device 10 of the present invention. In order to achieve at least one of the advantages or other advantages, an embodiment of the present invention provides an oil mist filter device 10. As shown in FIG. 1, the oil mist filtering device 10 includes a first oil droplet filtering device 100, a second oil droplet filtering device 200 and an oil and gas filtering device 300.

The process of filtering oil mist gas by the oil mist filter device 10 in this case is as follows: First, the first oil droplet filter device 100 receives an oil mist gas and separates the oil droplets in the oil mist gas to produce a first filtered gas; The two oil droplet filtering device 200 receives the first filtered gas and separates the remaining oil droplets in the first filtered gas to produce a second filtered gas; finally, the oil and gas filtering device 300 receives the second filtered gas and transfers the The second filtered gas is transformed into bubbles and injected into a solution (ie, the second solution L2 in FIG. 2) to filter the oil and gas in the second filtered gas to generate a third filtered gas. This third filtered gas is almost clean and oil-free, and can be discharged to the outside of the oil mist filtering device 10.

The first oil droplet filtering device 100 and the second oil droplet filtering device 200 provided in the foregoing embodiment have different oil droplet diameter ranges. In this way, oil droplets of various sizes from large to small (the diameter d is approximately between 0.01 μm to 1 μm) in the oil-containing mist gas can be effectively filtered, and the oil and gas filter device 300 is molecular oil and gas (d<0.01 μm) It is the main separation object. The first oil droplet filter device 100 and the second oil droplet filter device 200 are used to filter out the oil before the oil and gas separation. The granular oil droplets can prevent the mesh structure or porous structure in the oil and gas filter device 300 from being blocked, such as the bubble generator 330, the bubble elimination unit 370, the bubble breaking unit 360, etc. (please refer to the second figure and the corresponding explanatory text together) ). In one embodiment, the first oil droplet filtering device 100 and the second oil droplet filtering device 200 can choose filter devices with different filtering methods. For example, the first oil droplet filtering device 100 may be an inertial force separation device or a filter screen device. The second oil droplet filtering device 200 may be a centrifugal force separation device. But it is not limited to this. In other embodiments, the first oil droplet filtering device 100 may choose a filter device, and the second oil droplet filtering device 200 may choose an inertial force separation device or a centrifugal force separation device.

Please refer to FIG. 2 and FIG. 3 in conjunction with FIG. 1. FIG. 2 is a three-dimensional schematic diagram of an embodiment of the oil mist filter device 10 of the present invention, and FIG. 3 is a front schematic diagram of FIG. As shown in the figure, the first oil droplet filtering device 100 is an inertial force separating device that separates the oil droplets in the oil-containing mist gas by inertial force. The inertial force separation device includes a first cavity 120 and a first air inlet pipe 140. The first cavity 120 is used to contain a first solution L1. The first air inlet pipe 140 is formed by the first cavity 120. The outer side extends to the inside of the first cavity 120 for guiding the oil-containing mist gas to the surface of the first solution L1 to separate the oil droplets in the oil-containing mist gas. In one embodiment, the first solution L1 contains a surfactant to absorb oil and gas.

In one embodiment, as shown in the figure, the first air inlet pipe 140 is an L-shaped inertial guide tube, which separates the oil droplets in the oil-containing mist gas entering the first air inlet pipe 140 by inertial force. Specifically, the oil-containing mist gas entering the first intake pipe 140 undergoes at least one flow direction change. In the process of changing the flow direction of the oil mist gas each time, due to the existence of inertial force, the oil droplets in the oil mist gas can be changed. Throw it out to achieve separation. Secondly, the first air inlet pipe 140 is located above the water level of the first solution L1, and the oil droplets in the oil-containing mist gas will impact the first solution L1 due to inertial force and stay in the first solution L1. However, this case is not limited to this, the first intake pipe 140 can also be a Straight-cylinder inertial guide tube, the gas containing oil mist will impact the surface of the first solution L1 through the straight-cylinder inertial guide tube, and then the oil droplets in the gas containing oil mist can be separated.

The second oil droplet filtering device 200 is a centrifugal force separating device that separates the remaining oil droplets in the first filtered gas by centrifugal force. The centrifugal separation device includes a cyclone separator 280, and an inlet end 220 of the cyclone separator 280 is disposed in the first cavity 120 to extract the first filtered gas. The cyclone separator 280 filters the remaining oil droplets in the first filtered gas to produce the second filtered gas. The second filtered gas is discharged from an outlet end 240 of the cyclone separator 280.

In one embodiment, as shown in the figure, the cyclone separator 280 uses a high-speed fan 260 to extract the first filtered gas from the inlet end 220, and the cyclone separator 280 uses its centrifugal force to filter the first filtered gas. After filtering the remaining oil droplets in the gas, the second filtered gas is discharged from the outlet end 240.

In one embodiment, as shown in the figure, the second oil droplet filtering device 200 may include an oil reservoir box 290. The oil reservoir box 290 is connected to the inlet 220 of the cyclone separator 280 through a pipe body 295 for Accumulate the remaining oil droplets filtered out in the first filtered gas.

The oil and gas filtering device 300 includes a second cavity 310, a second air inlet pipe 320, a bubble generator 330, and an air outlet 390. The second cavity 310 is used to contain the second solution L2. In one embodiment, the second solution L2 contains a surfactant to absorb oil and gas. The second air inlet pipe 320 extends from the outlet end 240 of the cyclone separator 280 to the second cavity 310. The second filtered air system is driven by the high-speed fan 260 and transmitted to the bubble generator 330. The bubble generator 330 is used to transform the second filtered gas into bubbles, and then inject the bubbles into the second solution L2 to filter out the oil and gas in the second filtered gas to generate the third filtered gas. The gas outlet 390 is located on the second cavity 310, and the third filtered air system is discharged from the air outlet 390. In one embodiment, This second solution L2 contains a surfactant to absorb oil and gas.

In one embodiment, as shown in FIG. 3, the oil and gas filtering device 300 may include a first tubular structure 340 and a second tubular structure 350. The first tubular structure 340 is located in the second cavity 310 and communicates with the second air inlet pipe 320 through the bubble generator 330. The first tubular structure 340 extends downward from a first height position H1 in the second cavity 310 to a second height position H2 in the second cavity 310. The water level of the second solution L2 in the second cavity 310 is higher than the aforementioned first height position H1, so that the first tubular structure 340 will be completely immersed in the second solution L2.

The fluid flow distance defined by the first tubular structure 340 is greater than the vertical distance h between the first height position H1 and the second height position H2, so as to extend the movement of bubbles in the first tubular structure 340 from the first height position H1 to the second height position H1. Time of height position H2. The fluid flow distance can be understood as the distance between the fluid in the first tubular structure 340 from the first height position H1 along the internal structure of the first tubular structure 340 to the second height position H2.

In one embodiment, in order to extend the residence time of bubbles in the second solution L2 as much as possible to improve the oil and gas purification effect, the first tubular structure 340 may include a bent pipe structure, a coiled pipe structure, or a spiral pipe structure. As shown in the figure, the first tubular structure 340 of this embodiment includes a spiral tube structure that spirals downwards as an example.

The second tubular structure 350 extends upward at least from the second height position H2 in the second cavity 310 to the first height position H1 in the second cavity 310 and is located below the air outlet 390. In other words, the upper end opening of the second tubular structure 350 will be located at the first height position H1 or a position above it.

In one embodiment, as shown in the figure, all or at least part of the bubble generator 330 is immersed in the second solution L2 to ensure that the second filtered gas flows into the bubble generator 330 It can be fully converted into bubbles being injected into the second solution L2 and flowing along the first tubular structure 340.

In one embodiment, because the bubble uses its own buoyancy to move upward along the second tubular structure 350 without being driven by an external water pump, the fluid flow distance defined by the second tubular structure 350 can be smaller than that defined by the first tubular structure 340 The fluid flow distance. For example, as shown in the figure, the second tubular structure 350 may be a straight tubular structure in a vertical direction. Furthermore, in one embodiment, the cross section of the second tubular structure 350 may be larger than the cross section of the first tubular structure 340 to improve the air discharge efficiency. In addition, in one embodiment, as shown in the figure, a bubble rising area can be directly divided into the cavity as the second tubular structure 350 to save manufacturing cost.

In one embodiment, as shown in the figure, the oil and gas filtering device 300 may further include a bubble-defying unit 370 and at least one bubble-breaking unit 360 (two bubble-breaking units 360 are taken as an example in the figure). The defoaming unit 370 is disposed in the second tubular structure 350 and above the second solution L2 to prevent excessive bubbles from accumulating at the upper end of the second tubular structure 350 and overflowing the second tubular structure 350. For a preferred embodiment, the defoaming unit 370 can be a mesh element.

The two bubble breaking units 360 are arranged in the second tubular structure 350 at a certain distance, and are immersed in the second solution L2. The bubble breaking unit 360 can break the floating bubbles in the second tubular structure 350 to increase the contact area between the bubbles and the second solution L2, and help to prolong the residence time of the bubbles in the second solution L2 and improve the oil and gas filtering effect. For a preferred embodiment, the bubble breaking unit 360 can be a mesh element.

In one embodiment, as shown in the figure, the oil and gas filtering device 300 may include a fluid circulation unit 375. The fluid circulation unit 375 is used to draw the second solution L2 located at the second height position H2 into the bubble generator 330 to generate a fluid circulation (that is, from the bubble generator 330 through the first tubular structure 340 to the second Height position H2, then from the second height position H2 Return to the fluid circulation of the bubble generator 330). In one embodiment, the fluid circulation unit 375 may include a water pump (not shown). The water pump is arranged at the bottom of the second cavity 310 to pump the solution at the second height position H2. However, it is not limited to this, and the setting position of the water pump can be adjusted according to actual needs.

In one embodiment, the oil and gas filtering device 300 may include a spray pump 380. The spraying pump 380 is used to pump the second solution L2 at the second height position H2 to the top of the second tubular structure 350, and then spray it into the second tubular structure 350. Spraying the second solution L2 to the surface of the second solution L2 in the second tubular structure 350 through the spraying pump 380 helps to eliminate the bubbles formed on the surface of the second solution L2, and can further enhance the molecular state of oil and gas and the second solution L2 The mixing efficiency.

In one embodiment, the oil and gas filtering device 300 may include a heater 395. The heater 395 can be arranged in the second cavity 310 to increase the temperature of the second solution L2 in the second cavity 310 and improve the reaction efficiency between the oil and gas and the surfactant. However, the present case is not limited to this. The heater 395 can also be arranged in the fluid circulation unit 375, such as between the water pump and the bubble generator 330, to increase the temperature of the second solution L2 entering the bubble generator 330, and improve the oil and gas and interface activity. The reaction efficiency of the agent. Furthermore, in an embodiment, a temperature sensor (not shown) may be provided at the outlet of the heater 395 and in the first cavity 120 to facilitate control of the temperature of the first solution L1 and the second solution L2.

The arrow direction in FIG. 3 shows the gas flow direction of the oil mist filter device 10 in this case. As shown by the arrow in the figure, when the gas containing oil mist enters the first inlet pipe 140, the oil droplets in the gas containing oil mist impact the surface of the first solution L1 due to inertial force through the L-shaped flow channel and the high-speed flow of the gas containing oil mist. The first solution L1 is used to separate the oil droplets in the oil-containing mist gas to generate the first filtered gas. Subsequently, the cyclone separator 280 draws in the first filtered gas from the inlet end 220, and the centrifugal force The remaining oil droplets in the first filtered gas are filtered out to generate the second filtered gas, and the second filtered gas is discharged from the outlet end 240 of the cyclone separator 280. Finally, the second filtered gas is transferred to the bubble generator 330 through the second inlet pipe 320, and is converted into bubbles by the bubble generator 330. The bubbles will follow the flow direction of the second solution L2 from below the first tubular structure 340 The end opening enters the second tubular structure 350, and subsequently, the buoyancy of the bubble itself will cause the bubble to move upward along the second tubular structure 350 and rupture on the surface of the second solution L2. The clean gas (the third filtered gas) in the bubbles will be released to the space above the second tubular structure 350. The air outlet 390 is disposed on the second cavity 310 and located above the second tubular structure 350. The aforementioned clean gas (third filtered gas) released to the upper space of the second tubular structure 350 will be discharged through the gas outlet 390 to the outside.

Please also refer to FIG. 4, which is a schematic cross-sectional view of the bubble generator 330 in FIG. 3. As shown in FIG. 4, the bubble generator 330 includes a housing 332 and a porous structure 335. The casing 332 connects the second air inlet pipe 320 and the first tubular structure 340. The porous structure 335 is located in the housing 332 to convert the second filtered gas from the second inlet pipe 320 into bubbles, and then inject the second solution L2 in the first tubular structure 340.

The size of the pores of the porous structure 335 can be selected according to the size of the bubbles to be generated. The porous structure 335 may be a structure with holes, such as a sponge or a metal mesh. In one embodiment, in order to ensure that the second filtered gas can be smoothly transformed into bubbles and enter the second solution L2, the porous structure 335 is substantially flat and has a hollow structure. Moreover, in one embodiment, in order to improve the efficiency of the second filtered gas being transformed into bubbles, a device such as a high-speed fan 260 can be used to increase the air pressure in the second air inlet pipe 320.

Secondly, the foregoing embodiment utilizes the porous structure 335 to generate bubbles in the second solution L2. However, this case is not limited to this, the bubble generator 330 can also use other methods to The second filtered gas is converted into bubbles and injected into the second solution L2.

It is worth noting that the first oil droplet filtering device 100, the second oil droplet filtering device 200, and the oil and gas filtering device 300 shown in FIGS. 2 and 3 are an embodiment of the oil mist filtering device 10 of the present invention. This case is not limited to this. Furthermore, any two oil droplet filtering devices that can effectively filter out the oil droplets in the oil-containing mist gas can be used as the first oil droplet filtering device 100 and the second oil droplet filtering device 200 of this case; The device that converts gas to gas bubbles and injects into the solution to filter out the oil and gas in the gas can be used as the oil and gas filtering device 300 in this case. Through this three-stage oil mist filtration method, oil droplets of different sizes and molecular oil and gas in the gas can be effectively removed to achieve the effect of purifying the air.

Furthermore, in one embodiment, in order to improve the filtration efficiency, the diameter of the oil droplets filtered by the first oil droplet filtering device 100 is as a whole larger than the diameter of the oil droplets filtered by the second oil droplet filtering device 200. That is, the first oil droplet filter device 100 is used as a coarse filter filter device to filter the oily mist gas to generate the first filtered gas, and the second oil droplet filter device 200 is used as a fine filter device to filter the first filtered gas to generate the second filter gas. Filter the gas.

In summary, the oil mist filter device 10 provided by the present invention first separates the oil droplets in the oil and gas through the first oil droplet filter device 100, and then separates the remaining oil droplets in the oil and gas through the second oil droplet filter device 200 , And finally through the oil and gas filter device 300 to filter the molecular oil and gas in the oil and gas in the oil and gas filtration process, which can effectively remove the oil droplets of various sizes in the oil mist and the molecular oil and gas after gasification to obtain clean and oil-free gas and avoid the environment Pollution effectively protects human health.

Through the above detailed description of the preferred embodiments, it is hoped that the characteristics and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, its purpose is to cover all kinds of changes and equal security It falls within the scope of the patent intended for the present invention.

10: Oil mist filtration equipment

100: The first oil droplet filter device

200: The second oil droplet filter device

300: Oil and gas filtration device

120: first cavity

140: The first intake pipe

220: entrance side

240: Exit

260: High-speed fan

280: Cyclone Separator

290: oil reservoir

295: Tube Body

310: second cavity

320: second intake pipe

330: Bubble Generator

340: The first tubular structure

350: second tubular structure

360: foam breaking unit

370: Defoaming unit

375: fluid circulation unit

380: Spray pump

390: vent

395: heater

L1: the first solution

L2: second solution

H1: The first height position

H2: second height position

h: vertical distance

Claims (11)

An oil mist filtering device includes: a first oil droplet filtering device that receives an oil-containing mist gas and separates the oil droplets in the oil-containing mist gas to generate a first filtered gas; a second oil droplet filtering device that receives the gas The first filtered gas and the remaining oil droplets in the first filtered gas are separated to produce a second filtered gas, wherein the diameter range of the oil droplets separated by the first oil droplet filtering device and the second oil droplet filtering device Different; and an oil and gas filtering device that receives the second filtered gas and converts the second filtered gas into bubbles and injects it into a second solution to filter the oil and gas in the second filtered gas to generate a third filtered gas ; Wherein, the oil and gas filtering device includes a second cavity, a second air inlet pipe, a bubble generator, an air outlet, a first tubular structure and a second tubular structure, the second cavity system to accommodate The second solution, the second air inlet pipe is extended from the outlet end of the cyclone separator to the second cavity for transferring the second filtered gas to the bubble generator, and the bubble generator is used The second filtered gas is transformed into bubbles and injected into the second solution to filter out the oil and gas in the second filtered gas to generate the third filtered gas. The gas outlet is located on the second cavity, and the third The filtered air system is discharged from the air outlet, the first tubular structure is located in the second cavity and communicates with the second air inlet pipe through the bubble generator, and the first tubular structure is formed by a first in the second cavity. A height position extends downward to a second height position in the second cavity, and the second tubular structure extends from the second height position in the second cavity at least upward to the first height in the second cavity The height position is located below the air outlet, wherein the fluid flow distance defined by the first tubular structure is greater than a vertical distance between the first height position and the second height position. The oil mist filtering device according to claim 1, wherein the first oil droplet filtering device It is an inertial force separation device that separates the oil droplets in the oil-containing mist gas by inertial force. The oil mist filter device according to claim 2, wherein the inertial force separation device includes a first cavity and a first air inlet pipe, the first cavity system is used to contain a first solution, and the first inlet The trachea extends from the outer side of the first cavity into the first cavity for guiding the oil-containing mist gas to the surface of the first solution to separate the oil droplets in the oil-containing mist gas. The oil mist filtering device according to claim 1, wherein the first oil droplet filtering device is a filter device. The oil mist filtering device according to claim 1, wherein the second oil droplet filtering device is a centrifugal force separating device that separates the remaining oil droplets in the first filtered gas by centrifugal force. The oil mist filtering device according to claim 5, wherein the centrifugal force separation device includes a cyclone separator, and an inlet end of the cyclone separator is arranged in the first oil droplet filtering device to extract the first filtered gas The cyclone separator filters out the remaining oil droplets in the first filtered gas to generate the second filtered gas, and the second filtered gas is discharged from an outlet end of the cyclone separator. The oil mist filtering device according to claim 1, wherein the oil and gas filtering device further includes a defoaming unit and a defoaming unit, and the defoaming unit is disposed in the second tubular structure and located between the second solution Above, the bubble breaking unit is arranged in the second tubular structure and immersed in the second solution. The oil mist filtering device according to claim 1, wherein the first tubular structure includes a bent pipe structure, a coiled pipe structure, or a spiral pipe structure. The oil mist filtering device according to claim 1, wherein the bubble generator includes a porous structure. The oil mist filtering device according to claim 1, wherein the oil and gas filtering device is more It includes a fluid circulation unit for pumping the second solution at the second height position into the bubble generator. The oil mist filtering device according to claim 1, wherein the oil and gas filtering device further includes a spray pump for pumping the second solution at the second height position above the second tubular structure, and then spraying At the upper end of the second tubular structure.

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