An oil-gas separation device with an automatic filter element

Abstract

The present invention relates to an oil-gas separation device with a self-control filter element applied in the field of separation technology. Through the setting of the self-adjusting filter element, the oil absorption situation can be self-monitored. When the oil droplets adsorbed are large and the permeability becomes poor, the inner filter layer and the outer filter layer can be squeezed longitudinally or radially by the self-adjusting filter element to achieve rapid desorption and separation of the oil droplets from the self-adjusting filter element, effectively helping the self-adjusting filter element to quickly restore the permeability. Compared with the prior art, the ability of the self-adjusting filter element to separate the oil and gas of the exhaust gas can be quickly restored. On the one hand, the requirements for the impact force and flow rate of the exhaust gas are reduced, which greatly reduces the cost of use, thereby effectively reducing the energy consumption during oil-gas separation. On the other hand, the replacement frequency of the self-adjusting filter element is effectively reduced, so that the utilization rate of the oil-gas separation device is higher, and there is no need to frequently interrupt the oil-gas separation process, so as to effectively maintain the long-term continuous oil-gas separation of the exhaust gas and make the separation efficiency higher.

Description

Technical Field

[0001] The invention relates to an oil-gas separation device, in particular to an oil-gas separation device with a self-control filter element applied in the field of separation technology. Background Art

[0002] During industrial production or equipment operation, a large amount of oil-containing waste gas will be generated. Generally, the oil droplets in the waste gas need to be separated before being discharged.

[0003] In the prior art, an oil-gas separator is generally used to separate the oil droplets dispersed in the exhaust gas. However, the existing oil-gas separation devices only use filter elements for filtration. The filter element has limited oil bearing capacity. After a certain period of use, it adsorbs more oil droplets, resulting in poor permeability. The exhaust gas needs to have a higher speed and impact force to pass through the filter element smoothly to complete the oil-gas separation, resulting in high energy consumption for oil-gas separation treatment, and the permeability is easy to deteriorate, so that the filter element needs to be replaced frequently, the use cost is high, and it is easy to interrupt the continuity of oil-gas separation, affecting the separation efficiency. Summary of the invention

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the filter element in the existing oil-gas separator is prone to adhere to a large number of oil droplets, which is difficult to desorb and has a high cost of use.

[0005] In order to solve the above problems, the present invention provides an oil-gas separation device with a self-control filter element, comprising a shell with a control center, an air inlet and an air outlet are fixedly connected to the outer shell, a conical reflux shell is also connected to the lower end of the shell, two mounting plates with mounting holes are fixedly connected to the front end of the shell, a self-adjusting filter element is clamped inside the shell, a pressure regulating valve is installed on the top of the shell, and the air inlet is communicated with the space above the pressure regulating valve in the shell, a ferry pipe is fixedly connected to the lower end of the pressure regulating valve, and the lower end of the ferry pipe extends into the self-adjusting filter element, a liquid collecting outer tank and a liquid collecting inner tank are arranged inside the shell, and the liquid collecting outer tank and the liquid collecting inner tank are both coaxially arranged with the self-adjusting filter element, and two oil return one-way valves corresponding to the liquid collecting outer tank and the liquid collecting inner tank are also installed at the bottom of the shell;

[0006] The self-adjusting filter element includes two bearing rings, an inner oil filter layer and an outer oil filter layer fixedly connected between the two bearing rings, and two coaxial isolation cylinders are also fixedly connected between the two bearing rings. The isolation cylinder includes a limiting cylinder fixedly connected to the upper bearing ring and a plurality of support rods fixedly connected to the lower bearing ring. The limiting cylinder is fixedly connected to the plurality of support rods, and the outer oil filter layer is located between the two limiting cylinders. A plurality of micro pressure sensors distributed in a circular array are installed on the inner wall of the middle part of the outer limiting cylinder. The micro pressure sensors are connected to the control center signal. The inner oil filter layer is located inside the inner limiting cylinder. The inner oil filter layer includes a connecting ring fixedly connected to the upper bearing ring and a primary filter layer clamped at the lower end of the connecting ring. The primary filter layer includes two ring bodies and an inner filter layer fixedly connected between the two ring bodies.

[0007] In the above-mentioned oil-gas separation device with a self-control filter element, the oil absorption situation can be self-monitored through the setting of the self-adjusting filter element. When it adsorbs more oil droplets and the permeability becomes poor, the inner filter oil layer and the outer filter oil layer can be squeezed longitudinally or radially autonomously to achieve oil droplet desorption and accelerate the reflux of oil droplets. At the same time, the inner filter oil layer and the outer filter oil layer can be stably maintained in a state of good permeability. Compared with the existing technology, the replacement frequency of the self-adjusting filter element is effectively reduced, and the requirements for the impact force and flow rate of the exhaust gas are reduced, thereby greatly reducing the cost of use.

[0008] As a further improvement of the present application, the limiting cylinder is a hard porous structure, and the height of the limiting cylinder is 5-10 times the length of the support rod.

[0009] As a further improvement of the present application, the outer oil filter layer includes two secondary filter layers, two end rings fixedly connected to the ends of the two secondary filter layers close to each other, and a plurality of electric push rods fixedly connected between the two end rings and adjacent bearing rings. The two end rings are in contact with each other, and a plurality of electric push rods are also installed between the two ring bodies of the primary filter layer. The electric push rods are connected to the control center signal.

[0010] As a further improvement of the present application, the filter layer and the secondary filter layer are both made of oil-absorbing materials, and both are elastic and soft structures.

[0011] As another improvement of the present application, a bidirectional oil pressure assembly is provided on the outer oil filter layer and the inner filter layer, and the bidirectional oil pressure assembly includes a plurality of evenly distributed forward oil thrust sheets fixedly connected to the inner wall of the outer oil filter layer and a reverse oil thrust ring fixedly embedded in the outer oil filter layer or the inner filter layer, and the reverse oil thrust ring includes a plurality of reverse thrust air strips, a plurality of compressed air strips respectively spaced apart from the plurality of reverse thrust air strips, and a plurality of connecting pipes respectively connected between adjacent reverse thrust air strips and compressed air strips, the reverse thrust air strips, the connecting pipes and the compressed air strips are interconnected, and the interiors of the three are saturated with compressed air.

[0012] As another improved supplement of the present application, the forward oil thrust sheet is a hard porous structure, and the maximum width of the reverse thrust air strip is smaller than the width of the forward oil thrust sheet.

[0013] As another improved supplement of the present application, the limit cylinder is a porous structure, the outer limit cylinder is made of electromagnetic material, and the surface of the outer limit cylinder is wrapped with an insulating layer, and there is a mutual adsorption force between the positive oil push sheet and the limit cylinder after power is supplied.

[0014] As another improvement supplement to the present application, the distance between the reverse thrust strip and the inner wall of the outer oil filter layer is greater than the distance between the reverse thrust strip and the outer wall of the outer oil filter layer, and the connection between the connecting pipe and the reverse thrust strip is located on the side of the center line of the reverse thrust strip away from the outer oil filter layer.

[0015] As another improvement supplement of the present application, with the connecting pipe as the boundary, the end of the reverse thrust air strip close to the outer oil filter layer is an elastic structure, and the end of the reverse thrust air strip away from the outer oil filter layer is a hard structure;

[0016] The end of the air compression strip close to the outer oil filter layer and the end away from the outer oil filter layer are also respectively an elastic structure and a hard structure.

[0017] As another improved supplement of the present application, the cross-section of the air compression strip is a flat ellipse, and the air compression strip is a hollow sealing structure with a plurality of through holes.

[0018] In summary, through the setting of the self-adjusting filter element, the oil absorption situation can be self-monitored. When it adsorbs more oil droplets and the permeability becomes poor, the inner filter oil layer and the outer filter oil layer can be squeezed longitudinally or radially by itself to achieve rapid desorption and separation of oil droplets from the self-adjusting filter element, effectively helping the self-adjusting filter element to quickly restore permeability. Compared with the existing technology, its ability to separate oil and gas in exhaust gas can be quickly restored. On the one hand, the requirements for the impact force and flow rate of the exhaust gas are reduced, which greatly reduces the cost of use, thereby effectively reducing the energy consumption during oil and gas separation. On the other hand, the replacement frequency of the self-adjusting filter element is effectively reduced, so that the utilization rate of the oil and gas separation device is higher, and there is no need to frequently interrupt the oil and gas separation process, which effectively maintains the long-term continuous oil and gas separation of the exhaust gas, making the separation efficiency higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a side view of the first embodiment of the present application;

[0020] Figure 2 This is a front view of the first embodiment of the present application;

[0021] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0022] Figure 4A top view of the first embodiment of the present application;

[0023] Figure 5 This is a schematic diagram of the explosion decomposition of the automatic filter element in the first embodiment of the present application;

[0024] Figure 6 A half-section stereoscopic view of the automatic filter element in the first embodiment of the present application;

[0025] Figure 7 This is a schematic diagram of the self-control filter element performing oil droplet self-desorption in the first embodiment of the present application;

[0026] Figure 8 This is a three-dimensional diagram of the outer oil filter layer in the second embodiment of the present application;

[0027] Fig. 9 This is a radial cross-sectional view of the outer oil filter layer in the second embodiment of the present application;

[0028] Fig.10 This is a cross-sectional view of the outer oil filter layer in the second embodiment of the present application when it is subjected to bidirectional extrusion from inside to outside;

[0029] Fig.11 This is a partial cross-sectional view of the outer oil filter layer in the second embodiment of the present application when it is subjected to bidirectional extrusion from both inside and outside.

[0030] Description of the numbers in the figure:

[0031] 1 outer shell, 101 mounting plate, 21 air inlet, 22 exhaust port, 3 conical reflux shell, 4 air ferry, 5 self-adjusting filter element, 51 bearing ring, 521 primary filter layer, 522 connecting ring, 53 outer oil filter layer, 531 secondary filter layer, 532 end ring, 533 electric push rod, 54 limiting cylinder, 501 support rod, 601 liquid collecting outer tank, 602 liquid collecting inner tank, 6 oil return one-way valve, 7 forward oil pushing sheet, 81 reverse thrust gas strip, 82 connecting pipe, 83 compressed gas strip. DETAILED DESCRIPTION

[0032] Three implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0033] The first implementation method:

[0034] Figure 1 , Figure 2 as well as Figure 4An oil-gas separation device with a self-control filter element is shown, wherein the dotted line chuck indicates the flow direction of the gas, and the arrow indicates the moving direction of the separated oil droplets, comprising a housing 1 with a control center, the outer side of the housing 1 is respectively fixedly connected with an air inlet 21 and an exhaust port 22, the lower end of the housing 1 is also connected with a conical reflux shell 3, the front end of the housing 1 is fixedly connected with two mounting plates 101 each with a mounting hole, the interior of the housing 1 is clamped with a self-control filter element 5, a pressure regulating valve is installed on the top of the housing 1, and the air inlet 21 is communicated with the space above the pressure regulating valve in the housing 1, and the lower end of the pressure regulating valve is fixedly connected There is a ferry pipe 4, wherein the ferry pipe 4 is a tubular structure with an upper opening and a lower sealing, and a plurality of through holes are arranged at the outer end of the ferry pipe 4 facing the inner filter oil layer, which restricts the exhaust gas from entering the ferry pipe 4 and can only move toward the inner filter oil layer through the through holes, and the lower end of the ferry pipe 4 extends into the self-adjusting filter element 5, and an outer liquid collecting tank 601 and an inner liquid collecting tank 602 are arranged inside the housing 1, and the outer liquid collecting tank 601 and the inner liquid collecting tank 602 are both coaxially arranged with the self-adjusting filter element 5, and both are communicated with the bottom of the housing 1, and two oil return one-way valves 6 corresponding to the outer liquid collecting tank 601 and the inner liquid collecting tank 602 are also installed at the bottom of the housing 1; Figure 3 When the oil and gas are separated, the exhaust gas enters the top of the outer shell 1 from the air inlet 21, and is discharged through the gaps on the surface of the air ferry 4 to directly impact the inner filter oil layer, so that the gas and oil droplets undergo the first separation. After passing through the inner filter oil layer, most of the oil droplets are retained in the inner filter oil layer, and a small part of the oil droplets continue to move toward the outer filter oil layer 53 with the exhaust gas, pass through the outer filter oil layer 53 for the second separation, and then are discharged through the exhaust port 22.

[0035] like Figure 5 and Figure 6 The self-adjusting filter element 5 includes two supporting rings 51, an inner oil filter layer and an outer oil filter layer 53 fixedly connected between the two supporting rings 51, the outer oil filter layer 53 includes two sub-filter layers 531, two end rings 532 fixedly connected to the ends of the two sub-filter layers 531 close to each other, and a plurality of electric push rods 533 fixedly connected between the two end rings 532 and the adjacent supporting rings 51, the electric push rods 533 are connected to the control center signal, and the two end rings 532 are in contact with each other.

[0036] Two coaxial isolation cylinders are also fixedly connected between the two bearing rings 51. The isolation cylinder includes a limiting cylinder 54 fixedly connected to the upper bearing ring 51 and a plurality of supporting rods 501 fixedly connected to the lower bearing ring 51. The two limiting cylinders 54 are mainly used to isolate the outer oil filter layer 53 and the primary filter layer 521. Figure 7At the same time, when desorbing oil droplets, when the electric push rod 533 is controlled to shorten, the end ring 532 can be driven to squeeze the corresponding secondary filter layer 531. At this time, the limiting cylinder 54 can generate a certain resistance force, so that the oil droplets adsorbed in the secondary filter layer 531 are easier to be squeezed out, so that the recovery effect of the permeability of the two being squeezed is better, and the longitudinal extrusion is achieved to accelerate the desorption of oil droplets. The limiting cylinder 54 is fixedly connected to multiple support rods 501, and the outer oil filter layer is located between the two limiting cylinders 54. A plurality of micro pressure sensors distributed in a circular array are installed on the inner wall of the middle part of the outer limiting cylinder 54. The micro pressure sensor is connected to the control center signal. As the oil and gas separation time increases, the permeability gradually decreases. At this time, the resistance of the exhaust gas passing through the inner filter oil layer and the outer filter oil layer 53 increases, resulting in a decrease in the gas impact force data that the micro pressure sensor can detect. Based on the decrease in the data, the oil drop content on the inner filter oil layer and the outer filter oil layer 53 can be effectively inferred, which is convenient for timely controlling the shortening of the electric push rod 533 to perform longitudinal extrusion deoiling.

[0037] The inner filter oil layer is located inside the inner limiting cylinder 54, and the inner filter oil layer includes a layer fixed to the upper bearing ring 51, such as Figure 6 , a connecting ring 522 fixedly connected and a primary filter layer 521 clamped on the lower end of the connecting ring 522, the primary filter layer 521 includes two ring bodies and an inner filter layer fixedly connected between the two ring bodies, and a plurality of electric push rods 533 are also installed between the two ring bodies of the primary filter layer 521, so that the inner filter layer can also be longitudinally squeezed to separate oil droplets.

[0038] The limiting cylinder 54 is a hard porous structure, and the height of the limiting cylinder 54 is 5-10 times the length of the support rod 501, so that the oil droplets separated after extrusion are not easy to gather between the two limiting cylinders 54. The setting of the support rod 501 makes the bottom space larger, and the squeezed oil droplets can fall quickly under the action of gravity and enter the outer liquid collecting tank 601 or the inner liquid collecting tank 602, and then pass through the return oil one-way valve 6 to be discharged into the conical reflux shell 3. The filter layer and the secondary filter layer 531 are both made of oil-absorbing materials, and both are elastic and soft structures.

[0039] In the above-mentioned oil-gas separation device with a self-control filter element, the oil absorption situation can be self-monitored through the setting of the self-adjusting filter element 5. When it adsorbs more oil droplets and the permeability becomes poor, the inner filter oil layer and the outer filter oil layer 53 can be automatically squeezed longitudinally to achieve oil droplet desorption and accelerate the reflux of oil droplets. At the same time, the inner filter oil layer and the outer filter oil layer 53 can be stably in a state of good permeability. Compared with the existing technology, the replacement frequency of the self-adjusting filter element 5 is effectively reduced, and the requirements for the impact force and flow rate of the exhaust gas are reduced, thereby greatly reducing the cost of use.

[0040] The second implementation method:

[0041] Based on the first embodiment, this embodiment changes the method of restoring the permeability of the inner oil filter layer and the outer oil filter layer 53, and the rest is consistent with the first embodiment.

[0042] Figure 8 and Fig. 9 As shown, both the outer oil filter layer 53 and the inner filter layer are provided with a bidirectional oil pressure component, which can realize radial pushing of the outer oil filter layer 53 and the inner filter layer from both inside and outside directions, accelerate the separation and desorption of oil droplets from the two, and realize self-regulation of the permeability of the two. The bidirectional oil pressure component includes a plurality of evenly distributed forward oil thrust sheets 7 fixedly connected to the inner wall of the outer oil filter layer 53 and a reverse oil thrust ring fixedly embedded in the outer oil filter layer 53 or the inner filter layer. The reverse oil thrust ring includes a plurality of reverse thrust air strips 81, a plurality of compressed air strips 83 respectively spaced apart from the plurality of reverse thrust air strips 81, and a plurality of connecting pipes 82 respectively connected between adjacent reverse thrust air strips 81 and compressed air strips 83. The reverse thrust air strips 81, the connecting pipes 82 and the compressed air strips 83 are interconnected, and the interiors of the three are saturated with compressed air.

[0043] In this embodiment, the limit cylinder 54 is a porous structure, the outer limit cylinder 54 is made of electromagnetic material, and the surface of the outer limit cylinder 54 is wrapped with an insulating layer, so that when it is energized and has magnetism, the insulating layer can isolate its electricity and reduce safety hazards. There is a mutual adsorption force between the forward oil push sheet 7 and the limit cylinder 54 after power is supplied.

[0044] The forward oil push sheet 7 is a hard porous structure, and the maximum width of the reverse thrust air strip 81 is smaller than the width of the forward oil push sheet 7, which effectively ensures that after the outer limiting cylinder 54 is energized, when the limiting cylinder 54 adsorbs the forward oil push sheet 7 to compress the corresponding outer oil filter layer 53 or inner filter layer, the forward oil push sheet 7 can completely squeeze the reverse thrust air strip 81 opposite to it, effectively ensuring that the compressed air in the reverse thrust air strip 81 can be fully squeezed into the compressed air strip 83, so that the compressed air strip 83 bulges from the inside, thereby squeezing the outer oil filter layer 53 from the inside, and cooperating with the forward oil push sheet 7 to squeeze from the outside to the inside, it can effectively ensure that each time the oil droplets on the outer oil filter layer 53 and the inner filter layer are desorbed, the energy of the two is more fully squeezed, so that the effect of permeability recovery is better, and at the same time, the radial squeezing makes the deformation amplitude of the two smaller than the longitudinal squeezing, and correspondingly, the damage suffered is also smaller, so that the service life of the self-adjusting filter element 5 is longer than that of the first embodiment, thereby further reducing the replacement frequency.

[0045] With the connecting tube 82 as the boundary, the end of the reverse thrust strip 81 close to the outer oil filter layer 53 is an elastic structure, and the end of the reverse thrust strip 81 away from the outer oil filter layer 53 is a hard structure; the end of the compressed air strip 83 close to the outer oil filter layer 53 and the end away from the outer oil filter layer 53 are also elastic structures and hard structures respectively. The distance between the reverse thrust strip 81 and the inner wall of the outer oil filter layer 53 is greater than the distance between the reverse thrust strip 81 and the outer wall of the outer oil filter layer 53. The connection between the connecting tube 82 and the reverse thrust strip 81 is located on the side of the center line of the reverse thrust strip 81 away from the outer oil filter layer 53, so that when the reverse thrust strip 81 is squeezed by the forward oil push sheet 7, the deformation amplitude of the reverse thrust strip 81 is larger, and the gas therein can be transferred to the compressed air strip 83 more, so that the compressed air strip 83 bulges to a greater extent, and the outer oil filter layer 53 is squeezed more fully.

[0046] It is worth noting that in order to ensure the integrity of the outer oil filter layer 53, the reverse oil push ring can also be directly sleeved outside the outer oil filter layer 53, and at the same time contact with the limit tube 54 and the outer surface of the outer oil filter layer 53, so that the bidirectional extrusion between the inside and the outside is more sufficient.

[0047] In the above arrangement, the arrangement of the reverse oil push ring and the forward oil push sheet 7 on the inner filter layer is consistent with that on the outer oil filter layer 53 .

[0048] The cross-section of the compressed air strip 83 is a flat ellipse, and the compressed air strip 83 is a hollow sealing structure with multiple through holes, so that the compressed air strip 83 has strong radial permeability and a relatively small internal space, that is, it is not easy to affect the passage of exhaust gas. At the same time, after the gas of the reverse thrust strip 81 is transferred thereto, the volume of the compressed air strip 83 can change significantly, which is convenient for squeezing the outer oil filter layer 53 from the outside to the inside to a greater extent and a better effect.

[0049] In summary, through the setting of the self-adjusting filter element 5, the oil absorption situation can be self-monitored. When it adsorbs more oil droplets and the permeability becomes poor, it can independently squeeze the inner filter layer and the outer filter layer 53 radially. With the forward oil push plate 7 and the reverse oil push ring, it can also realize radial extrusion and de-attachment of fast oil droplets from both inside and outside, effectively helping the self-adjusting filter element 5 to quickly restore permeability. Compared with the existing technology, its ability to separate oil and gas in exhaust gas can be quickly restored. On the one hand, the requirements for the impact force and flow rate of the exhaust gas are reduced, which greatly reduces the cost of use, thereby effectively reducing the energy consumption during oil and gas separation. On the other hand, the replacement frequency of the self-adjusting filter element 5 is effectively reduced, so that the utilization rate of the oil and gas separation device is higher, and there is no need to frequently interrupt the oil and gas separation process, which effectively maintains the long-term continuous oil and gas separation of the exhaust gas, making the separation efficiency higher.

[0050] The third implementation method:

[0051] In this embodiment, in combination with the first embodiment and the second embodiment, the oil droplet squeezing and separation of the inner oil filter layer and the outer oil filter layer 53 can be achieved, which can be performed in both the longitudinal and radial directions. Each time the squeezing is performed, radial squeezing with a small deformation can be performed first. After a long time, longitudinal up and down squeezing can be performed once, thereby making the squeezing more complete and effectively squeezing out the oil droplets remaining in each radial squeezing, thereby improving the utilization rate of the self-adjusting filter element 5 and further reducing the replacement frequency.

[0052] Specifically, the forward oil push sheet 7 is configured to be a plurality of ferromagnetic metal sheets which are rotated in series with each other. When subjected to the adsorption force of the limiting cylinder 54 after power is turned on, they can also be radially extruded. At the same time, when the electric push rod 533 is shortened, the plurality of ferromagnetic metal sheets of the forward oil push sheet 7 can be rotated and folded, without limiting the longitudinal extrusion and folding of the outer oil filter layer 53. At the same time, the reverse thrust air strip 81 and the air compression strip 83 are both configured to be elastic structures, and at the same time, they are in conflict with the limiting cylinder 54 and the outer oil filter layer 53.

[0053] The arrangement of the positive oil push sheet 7 and the reverse oil push ring on the corresponding inner oil filter layer is consistent with the above.

[0054] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An oil-gas separation device with an automatic filter element, characterized in that: The invention comprises a housing (1) with a control center, the housing (1) having an air inlet (21) and an air outlet (22) fixedly connected to the outer side of the housing (1), a conical reflux housing (3) connected to the lower end of the housing (1), two mounting plates (101) each having a mounting hole fixedly connected to the front end of the housing (1), a self-adjusting filter element (5) clamped inside the housing (1), a pressure regulating valve installed on the top of the housing (1), and the air inlet (21) and the air space above the pressure regulating valve in the housing (1) are connected to each other. The lower end of the pressure regulating valve is fixedly connected to an air ferry pipe (4), the lower end of the air ferry pipe (4) extends into the self-adjusting filter element (5), the outer shell (1) is provided with an outer liquid collecting tank (601) and an inner liquid collecting tank (602), the outer liquid collecting tank (601) and the inner liquid collecting tank (602) are both coaxially arranged with the self-adjusting filter element (5), and the bottom of the shell (1) is also provided with two oil return one-way valves (6) corresponding to the outer liquid collecting tank (601) and the inner liquid collecting tank (602), respectively; The self-adjusting filter element (5) comprises two bearing rings (51), an inner oil filter layer and an outer oil filter layer (53) fixedly connected between the two bearing rings (51), two coaxial isolation cylinders fixedly connected between the two bearing rings (51), the isolation cylinder comprising a limiting cylinder (54) fixedly connected to the upper bearing ring (51) and a plurality of supporting rods (501) fixedly connected to the lower bearing ring (51), the limiting cylinder (54) being fixedly connected to the plurality of supporting rods (501), and the outer oil filter layer being located between the two limiting cylinders (5 4), a plurality of micro pressure sensors distributed in a ring array are installed on the inner wall of the middle part of the outer limiting cylinder (54), the micro pressure sensors are connected to the control center signal, the inner filter oil layer is located inside the inner limiting cylinder (54), the inner filter oil layer comprises a connecting ring (522) fixedly connected to the upper bearing ring (51) and a primary filter layer (521) clamped at the lower end of the connecting ring (522), the primary filter layer (521) comprises two ring bodies and an inner filter layer fixedly connected between the two ring bodies; The outer oil filter layer (53) comprises two secondary filter layers (531), two end rings (532) respectively fixedly connected to the ends of the two secondary filter layers (531) close to each other, and a plurality of electric push rods (533) fixedly connected between the two end rings (532) and the adjacent bearing ring (51), the two end rings (532) are in contact with each other, and a plurality of electric push rods (533) are also installed between the two ring bodies of the primary filter layer (521), and the electric push rods (533) are connected to the control center signal.

2. The oil-gas separation device with an automatic filter element according to claim 1, characterized in that: The limiting cylinder (54) is a hard porous structure, and the height of the limiting cylinder (54) is 5-10 times the length of the support rod (501).

3. The oil-gas separation device with an automatic filter element according to claim 1, characterized in that: The filter layer and the secondary filter layer (531) are both made of oil-absorbing materials, and both are elastic and soft structures.

4. The oil-gas separation device with an automatic filter element according to claim 1, characterized in that: The outer oil filter layer (53) and the inner filter layer are both provided with a bidirectional oil pressure assembly, the bidirectional oil pressure assembly comprising a plurality of evenly distributed forward oil thrust sheets (7) fixedly connected to the inner wall of the outer oil filter layer (53) and a reverse oil thrust ring fixedly embedded in the outer oil filter layer (53) or the inner filter layer, the reverse oil thrust ring comprising a plurality of reverse thrust air strips (81), a plurality of compressed air strips (83) respectively spaced apart from the plurality of reverse thrust air strips (81) and a plurality of connecting pipes (82) respectively connected between adjacent reverse thrust air strips (81) and compressed air strips (83), the reverse thrust air strips (81), the connecting pipes (82) and the compressed air strips (83) are interconnected, and the interiors of the three are saturated with compressed air.

5. The oil-gas separation device with an automatic filter element according to claim 4, characterized in that: The forward oil-thrusting sheet (7) is a hard porous structure, and the maximum width of the reverse thrust air strip (81) is smaller than the width of the forward oil-thrusting sheet (7).

6. The oil-gas separation device with an automatic filter element according to claim 5, characterized in that: The limiting cylinder (54) is a porous structure, the limiting cylinder (54) on the outside is made of electromagnetic material, and the surface of the limiting cylinder (54) on the outside is wrapped with an insulating layer, and there is a mutual adsorption force between the positive oil pushing sheet (7) and the limiting cylinder (54) after power is supplied.

7. The oil-gas separation device with an automatic filter element according to claim 6, characterized in that: The distance between the reverse thrust air strip (81) and the inner wall of the outer oil filter layer (53) is greater than the distance between the reverse thrust air strip (81) and the outer wall of the outer oil filter layer (53), and the connection point between the connecting pipe (82) and the reverse thrust air strip (81) is located on the side of the center line of the reverse thrust air strip (81) away from the outer oil filter layer (53).

8. The oil-gas separation device with an automatic filter element according to claim 7, characterized in that: With the connecting pipe (82) as the boundary, the end of the reverse thrust air strip (81) close to the outer oil filter layer (53) is an elastic structure, and the end of the reverse thrust air strip (81) away from the outer oil filter layer (53) is a hard structure; The end of the air compression strip (83) close to the outer oil filter layer (53) and the end away from the outer oil filter layer (53) are also elastic and hard structures respectively.

9. The oil-gas separation device with an automatic filter element according to claim 8, characterized in that: The cross section of the air compression strip (83) is a flat ellipse, and the air compression strip (83) is a hollow sealing structure with a plurality of through holes.

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