Gas storage gas injection compressor degreaser with intubation tube type filter element

Abstract

The invention belongs to the field of oil and gas field equipment, and discloses a gas storage gas injection compressor degreaser with a pipe insertion type filter element, which comprises a barrel, a support plate is arranged in an inner cavity of the barrel, an oil guide pipe is arranged on the support plate, an inlet pipe is arranged on the barrel at a primary separation cavity, and a blow-off pipe is arranged at the bottom of the barrel; a filter element assembly is arranged at the upper part of the supporting plate in the barrel, a through hole for enabling a gas-liquid mixture to flow into the filter element assembly is formed in the supporting plate, and an outlet pipe is arranged at the position, above the filter element assembly, of the barrel; the filter element assembly comprises a filter unit, the filter unit comprises a supporting pipe and a filter layer fixedly arranged outside the supporting pipe in a sleeving mode, the supporting pipe extends to the top of the filter layer from the bottom of the filter layer, a plurality of filter holes are formed in the area, corresponding to the filter layer, of the supporting pipe, and the top of the filter layer and the top of the supporting pipe are closed. According to the invention, gas can uniformly flow out from the pores of the supporting pipe in the filtering process, so that the filter element is fully utilized.

Description

Technical Field

[0001] The invention belongs to the field of oil and gas field equipment, and in particular relates to a gas storage reservoir gas injection compressor oil remover with a plug-in filter element. Background Art

[0002] Gas storage is the primary way to regulate natural gas peak load due to its advantages of strong peak load regulation capability, low investment cost, large reserves and high safety factor. When injecting gas, dry gas is usually used as the gas source, which is transported to the gas storage area injection station through a long-distance pipeline. The gas is then separated and filtered at the injection station, and then pressurized by a compressor. The cooled gas is filtered again, and the lubricating oil from the compressor is removed before it is injected into the underground gas storage for storage.

[0003] When the gas injection compressor is working, lubricating oil will be injected into the cylinder for lubrication and sealing. During the exhaust process, the lubricating oil droplets will flow to the downstream pipeline of the compressor along with the natural gas, and then enter the gas storage reservoir and penetrate into the gaps in the formation, changing the porosity of the gas storage reservoir and reducing the gas storage capacity of the reservoir, seriously affecting the production of injection and production wells. Therefore, at the outlet of the gas injection compressor, an efficient oil remover is required to separate and filter the oil-containing natural gas at the exhaust end.

[0004] The oil-gas mixture processed by the gas injection compressor deoiler has a large flow rate and high pressure. It is usually a vertical structure consisting of two parts, the upper and lower parts. The bottom is the primary separation chamber, where the oil-gas mixture first reaches, and the larger oil droplets with a diameter of more than 10 μm are separated by inertial collision. There are regularly arranged filter elements in the upper part of the deoiler. After the oil-gas mixture enters the filter element at a slower speed, it is further separated by agglomeration on the fiber surface, and the tiny oil droplets that have not been separated in the primary separation equipment are further removed.

[0005] The efficiency of the deoiler not only has an important impact on the utilization rate of lubricating oil and the service life of the filter element, but the purity of the gas also plays a vital role in the smooth operation of downstream pipelines and other equipment. However, the existing deoiler has low oil removal efficiency, and lubricating oil will still accumulate on the downstream pipeline, and even lubricating oil will enter the injection and production well, which brings great trouble to the safe production of the entire gas storage. The main reason for this phenomenon is that the structure of the filter element in the existing gas storage gas injection compressor deoiler is unreasonable. The existing filter element is straight-cylindrical and arranged vertically. The lubricating oil adsorbed and filtered on the filter element will move downward along the outer surface of the filter element and gradually gather in the lower half of the straight section of the filter element, forming an attached liquid film. When the gas passes through the bottom, it will carry small droplets, resulting in entrainment, and under the working conditions of the gas storage, the mainstream field of the gas-liquid mixture gathers at the bottom of the filter element, about the lower 1 / 3, making the upper part of the filter element idle, and it is difficult to fully play the filtering effect. During the entire gas injection cycle, the gas injection pressure gradually increases and the gas velocity entering the filter element gradually decreases. The above phenomenon will become more and more serious, further causing a decrease in the filter element efficiency. Summary of the invention

[0006] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a gas storage gas injection compressor oil remover with a plug-in filter element, which can improve the utilization rate and filtration efficiency of the filter element.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is as follows: An oil remover for an air storage gas injection compressor with a plug-in filter element comprises a cylinder, a support plate is provided in the inner cavity of the cylinder, a chamber below the support plate in the cylinder is used as a primary separation chamber, an oil guide pipe is provided on the support plate, an inlet pipe is provided on the cylinder at the primary separation chamber, and a sewage discharge pipe is provided at the bottom of the cylinder; A filter element assembly is arranged on the upper part of the support plate in the cylinder, a through hole is opened on the support plate for the gas-liquid mixture to flow into the filter element assembly, and an outlet pipe is arranged on the upper part of the filter element assembly in the cylinder; The filter element assembly includes a filter unit, which includes a support tube and a filter layer fixedly mounted on the outside of the support tube. The support tube extends from the bottom of the filter layer to the top of the filter layer. A plurality of filter holes are opened on the support tube in an area corresponding to the filter layer. The filter layer and the top of the support tube are closed.

[0008] Preferably, a filter element limiting support ring for limiting the lower end of the filter layer is provided on the support tube, and the filter element limiting support ring includes a plurality of concentric and spaced circular rings, and the plurality of circular rings are fixedly connected by a connecting bracket.

[0009] Preferably, a support tube positioning rod is provided at the top end of the support tube, a filter layer positioning hole adapted to the support tube positioning rod is provided at the top of the filter layer, and the support tube positioning rod extends into the filter layer positioning hole.

[0010] Preferably, the filter layer includes a filter element and a filter element upper cover, the filter element sleeve is arranged outside the support tube, the filter element upper cover is arranged at the upper end of the filter element, and the filter layer positioning hole is opened on the filter element upper cover.

[0011] Preferably, a gap is provided between the outer wall of the support tube positioning rod and the inner wall of the filter layer.

[0012] Preferably, the size of the gap is 2 mm to 3 mm.

[0013] Preferably, the plurality of filter holes are evenly distributed in an array on the support tube.

[0014] Preferably, the filter element assembly comprises a plurality of filter units arranged parallel to each other.

[0015] Preferably, the inner cavity of the cylinder is provided with a U-shaped inlet baffle on the outlet side of the inlet pipe, the bottom edge of the inlet baffle is arc-shaped, the concave side of the bottom edge of the inlet baffle is opposite to the outlet side of the inlet pipe, and the two wing edges of the inlet baffle are respectively located on the upper and lower sides of the outlet side of the inlet pipe.

[0016] Preferably, the inner cavity of the cylinder is provided with a rectifying plate at the inlet side of the outlet pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The separation efficiency of the oil remover of the gas storage gas injection compressor is low, and the recovery rate of the oil injected into the compressor is low. After passing through the oil remover, a large amount of lubricating oil still remains in the natural gas, adhering to the pipe wall or entering the formation, seriously affecting the production of the injection and production wells. The specific reason is that the flow field of the oil-containing natural gas reaching the filter element is uneven, the filtering burden at the bottom section of the filter element is too high, and the oil film accumulates at the bottom of the filter element, causing suction and entrainment. The filter element cannot achieve the most efficient filtering performance, so it fails quickly, the replacement cycle is short, and the operating cost of the oil remover is high. The feature of the present invention is to stretch the short support tube at the bottom of the existing structure upward to penetrate the entire height of the filter element, and to arrange holes (i.e., filter holes) on the surface of the support tube, and at the same time install the filter element on the outside of the support tube in the form of a sleeve. The improvement of the filter element structure can make the oil-containing natural gas evenly discharged from the filter holes of the support tube, making the load of the filter element group more uniform, promoting the uniform distribution of the liquid film on the filter element, avoiding the large amount of liquid film gathering at the bottom of the vertical filter element, reducing the possibility of entrainment, and improving the airflow movement characteristics of the entire filter element group, so that more gas-liquid two-phase mixture can reach the upper part of the deoiler, improving the overall efficiency of the filter element group. In addition, in the existing structure, since the support tube is short and there is only one operating port on the top, the filter element will be slightly shaken when it is hoisted and placed, and positioning and placement are very difficult. In the structure of the present invention, since the support tube is elongated, when installing or replacing the filter element, it only needs to be slightly aligned and inserted, which brings great convenience to the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the overall appearance structure diagram of the gas storage gas injection compressor deoiler with a plug-in filter element of the present invention; Figure 2 It is an internal cross-sectional view of the oil remover of the gas storage gas injection compressor with the intubation filter element of the present invention; Figure 3 Schematic diagram of a filter element assembly according to an embodiment of the present invention (the filter element unit in the middle is a quarter longitudinal section); Figure 4 A longitudinal cross-sectional view of a quarter of a filter element unit used in an embodiment of the present invention; Figure 5 It is an enlarged schematic diagram of the top of the filter element unit in an embodiment of the present invention (a quarter longitudinal section).

[0019] Figure 6 A simulation model diagram in an embodiment of the present invention; Figure 7 A model diagram of a filter element limiting support ring in an embodiment of the present invention; Figure 8 The velocity fields of the internal sections of the two model structures when v=0.5m / s in the embodiment of the present invention; Fig. 9 1 is the velocity field of the internal section of the two model structures when v=3.0m / s in the embodiment of the present invention.

[0020] In the figure: 1-cylinder, 1-1-inlet pipe, 1-2-outlet pipe, 1-3-drain pipe, 1-4-primary separation chamber, 2-top cover, 3-inlet baffle, 4-support plate, 4-1-filter tube through hole, 4-2-oil guide pipe through hole, 5-oil guide pipe, 6-filter hole, 7-support pipe, 7-1-support tube positioning rod, 7-2-gap, 8-filter layer, 8-1-filter layer positioning hole, 8-2-filter element upper cover, 8-3-filter element, 9-rectifier plate, 10-filter element limiting support ring, 10-1-circular ring, 10-2-connecting bracket, 10-3-gap. DETAILED DESCRIPTION

[0021] Hereinafter, the specific embodiments of the present application will be described in detail with reference to the accompanying drawings. According to these detailed descriptions, those skilled in the art can clearly understand the present application and can implement the present application. Without violating the principles of the present application, the features in the various embodiments can be combined to obtain new implementations, or certain features in certain embodiments can be replaced to obtain other preferred implementations.

[0022] like Figure 1-Figure 4 As shown, the gas storage gas injection compressor deoiler with a plug-in filter element in this embodiment includes a cylinder 1, the inner cavity of the cylinder 1 is provided with a support plate 4, the chamber below the support plate 4 in the cylinder 1 is used as a primary separation chamber 1-4, the support plate 4 is provided with an oil guide pipe 5, the oil guide pipe 5 is used to guide the liquid on the upper part of the support plate 4 into the wall surface of the primary separation chamber 1-4 or the outside of the cylinder 1, the cylinder 1 is provided with an inlet pipe 1-1 at the primary separation chamber 1-4, and the bottom of the cylinder 1 is provided with a sewage pipe 1-3; A filter element assembly is provided on the upper part of the support plate 4, and a through hole is opened on the support plate 4 for allowing the gas-liquid mixture to flow into the filter element assembly. The cylinder 1 is provided with an outlet pipe 1-2 above the filter element assembly; the filter element assembly includes a filter unit, and the filter unit includes a support tube 7 and a filter layer 8 fixedly sleeved on the outside of the support tube 7, the support tube 7 extends from the bottom of the filter layer 8 to the top of the filter layer 8, and a plurality of filter holes 6 are opened on the support tube 7 in the area corresponding to the filter layer 8, and the filter layer 8 and the top of the support tube 7 are closed.

[0023] When the gas storage gas injection compressor deoiler with the intubation filter element in the above embodiment of the present invention is used in the gas storage gas injection compressor, the specific deoiling process is as follows: The high-pressure natural gas-lubricating oil mixture at the exhaust end of the compressor enters the primary separation chamber 1-4 from the inlet pipe 1-1. In the primary separation chamber 1-4, a part of the liquid in the gas-liquid mixture is captured by the wall of the cylinder 1 and then flows to the bottom of the cylinder 1. When the oil accumulates to a certain amount, it is discharged from the sewage pipe 1-3 through sewage control, thereby realizing the preliminary separation of the gas-liquid mixture. The remaining gas-liquid mixture moves upward and then enters the filter element assembly through the through hole on the support plate 4 for gas-liquid separation.

[0024] When the gas-liquid mixture enters the support tube 7 through the through hole on the support plate 4, it can be evenly distributed in the length direction of the support tube 7. The gas-liquid mixture flowing out of the filter hole 6 of the support tube 7 flows through the filter layer 8, and the gas-liquid separation is achieved with the help of the filter fiber of the filter layer 8. The oil liquid agglomerated on the filter layer 8 flows downward along the surface of the filter layer 8 to the support plate 4. After the separated oil liquid accumulates to a certain amount, it enters the oil guide pipe 5 from the through hole 4-2, and is discharged to the outside of the cylinder 1 or the inner wall of the cylinder 1 along the oil guide pipe 5, and flows along the wall to the bottom of the cylinder 1. The purified high-pressure natural gas flowing out from the side of the filter layer 8 moves further upward, and then is discharged from the outlet pipe 1-2 and enters the downstream pipeline.

[0025] As a preferred embodiment of the present invention, in this embodiment, Figure 3 As shown, a filter element limiting support ring 10 for limiting the lower end of the filter layer 8 is provided on the support tube 7. The filter element limiting support ring 10 includes a plurality of concentric and spaced circular rings 10-1, and the plurality of circular rings 10-1 are fixedly connected by a connecting bracket 10-2. During assembly, the circular ring with the smallest diameter in the filter element limiting support ring 10 can be connected to the support tube 7 by interference fit or by welding. Since there is a gap between the circular rings 10-1, the filter element limiting support ring 10 of this embodiment can support the filter element while ensuring that the oil droplets filtered from the filter element can flow down from the gaps between the circular rings 10-1 and enter the sewage pipe for sewage discharge. Therefore, when installing or replacing the filter layer 8, it only needs to be slightly aligned and inserted, which brings great convenience to the operator.

[0026] As a preferred embodiment of the present invention, in this embodiment, Figure 4 , Figure 5As shown, a support tube positioning rod 7-1 is provided at the top of the support tube 7, and a filter layer positioning hole 8-1 adapted to the support tube positioning rod 7-1 is provided at the top of the filter layer 8. The support tube positioning rod 7-1 extends into the filter layer positioning hole 8-1. The support tube positioning rod 7-1 and the filter layer positioning hole 8-1 cooperate with each other to achieve positioning between the support tube positioning rod 7-1 and the filter layer positioning hole 8-1. Therefore, when installing or replacing the filter layer 8, it only needs to be slightly aligned and inserted, which brings great convenience to the operator.

[0027] As a preferred embodiment of the present invention, in this embodiment, Figure 4 , Figure 5 As shown, the filter layer 8 includes a filter element 8-3 and a filter element upper cover 8-2. The filter element 8-3 is sleeved on the outside of the support tube 7. The filter element upper cover 8-2 is arranged on the upper end of the filter element 8-3. The filter element upper cover 8-2 is used to seal the filter element 8-3 and the upper end of the support tube 7 to prevent gas leakage. The filter layer positioning hole 8-1 is opened on the filter element upper cover 8-2.

[0028] As a preferred embodiment of the present invention, in this embodiment, Figure 5 As shown, a gap 7-2 is provided between the outer wall of the support tube positioning rod 7-1 and the inner wall of the filter layer 8. The advantage of this structural design is that the airflow flowing out of the filter hole 6 of the support tube 7 can be mixed in the gap 7-2, so that the gas-liquid mixed fluid can be further evenly distributed in the height direction of the filter layer 8, thereby making the filter layer 8 fully utilized and improving the efficiency of the filter element. Furthermore, the size of the gap 7-2 is 2mm~3mm, which can prevent the gas-liquid mixed fluid from dropping too fast in the height direction of the filter layer 8, and is conducive to the uniform distribution of the gas-liquid mixed fluid in the height direction of the filter layer 8.

[0029] As a preferred embodiment of the present invention, in this embodiment, Figure 2-Figure 5 As shown, a plurality of filter holes 6 are evenly distributed in an array on the support tube 7. The size of the filter holes 6 can be set according to specific circumstances, and the present invention does not make a specific limitation.

[0030] As a preferred embodiment of the present invention, in this embodiment, Figure 2 and Figure 3 As shown, the filter element assembly includes a plurality of filter units arranged parallel to each other.

[0031] As a preferred embodiment of the present invention, in this embodiment, Figure 2As shown, the inner cavity of the cylinder 1 is provided with a U-shaped inlet baffle 3 on the outlet side of the inlet pipe 1-1. The bottom edge of the inlet baffle 3 is arc-shaped, and the concave side of the bottom edge of the inlet baffle 3 is opposite to the outlet side of the inlet pipe 1-1. The two wing edges of the inlet baffle 3 are respectively located on the upper and lower sides of the outlet side of the inlet pipe 1-1. The advantage of this structural design is that when the high-pressure natural gas-lubricating oil mixture at the exhaust end of the compressor enters the primary separation chamber 1-4 from the inlet pipe 1-1, the gas-liquid mixture will impact the bottom edge of the inlet baffle 3, and the larger particle size oil droplets in the mixture will adhere to the inner wall of the bottom edge of the inlet baffle 3, aggregate and spread on the inner wall of the bottom edge of the inlet baffle 3 to form an oil film, and then flow down along the bottom edge of the inlet baffle 3, converge on the wing edge on the lower side of the inlet baffle 3 (that is, the wing edge located on the lower side of the inlet pipe 1-1), and then drip and flow down from both sides of the wing edge to reach the bottom of the deoiler cylinder 1; and the inlet baffle 3 After the bottom edge collision, the gas-liquid mixture is forced to flow out from both sides of the inlet baffle 3 (i.e., the openings on both sides of the bottom edge of the inlet baffle 3), and the two air flows continue to move along the wall of the cylinder 1. During this process, the gas-liquid mixture collides and separates again on the wall of the cylinder 1, and then the fluid moving along the wall of the cylinder further flows around in the primary separation chamber 1-4. The oil-gas mixture moving in the primary separation chamber 1-4 continuously collides and contacts with the wall of the cylinder 1, so the oil droplets therein continuously converge on the wall of the cylinder 1, and after they gather to form a liquid film, they flow to the bottom of the cylinder 1 along the wall of the cylinder 1.

[0032] As a preferred embodiment of the present invention, in this embodiment, Figure 2 As shown, the inner cavity of the cylinder 1 is provided with a rectifying plate 9 at the inlet side of the outlet pipe 1-2. The rectifying plate 9 can rectify the purified high-pressure natural gas flowing out from the side of the filter element 8-3 into a relatively stable airflow, which is then discharged from the outlet pipe 1-2 and enters the downstream pipeline.

[0033] Example The gas storage gas injection compressor oil remover with a plug-in filter element in this embodiment comprises a cylindrical barrel 1 and a filter layer 8, wherein the bottom of the barrel 1 is a primary separation chamber 1-4, a filter assembly is arranged in the middle and upper part, an inlet pipe 1-1 for supplying an oil-gas mixture into the primary separation chamber 1-4 is arranged in the lower part of the barrel 1, an outlet pipe 1-2 for the purified gas to flow out is arranged above the filter assembly in the upper part of the barrel 1, the inlet pipe 1-1 and the central axis of the outlet pipe 1-2 are arranged at 90 degrees, and the bottom of the barrel 1 is provided with a filter assembly. There is a vertical downward drain pipe 1-3 in the middle of the cylinder 1; in the lower primary separation chamber 1-4, in the oil remover, an arc-shaped concave semi-enclosed inlet baffle 3 is installed behind the inlet pipe 1-1 (i.e., the outlet side of the inlet pipe 1-1), and the inlet baffle 3 is in a U-shape, with an arc-shaped bottom edge, and the concave side of the bottom edge is opposite to the outlet side of the inlet pipe 1-1; a support plate 4 is installed in the middle of the cylinder 1, and the filter element assembly is supported above the support plate 4, and the primary separation chamber 1-4 is below the support plate 4. The filter element assembly includes 6 vertically arranged filter units, each filter unit includes a cylindrical support tube 7 and a filter layer 8 sleeved on the support tube 7, and a 2mm~3mm gap 7-2 is left between the filter layer 8 and the support tube 7, and the surface of the support tube 7 corresponding to the filter layer 8 is evenly provided with filter holes 6; six filter tube through holes 4-1 are provided on the support plate, and an oil guide tube through hole 4-2 connected to the oil guide tube 5 near the side of the cylinder 1, and the oil guide tube through hole 4- 2 is connected to the oil guide pipe 5, and the oil guide pipe 5 is connected to the outside of the cylinder; the lower end of each support pipe 7 corresponds to a filter pipe through hole 4-1, and a support plate 10 is installed at the lower part of the support pipe 7. The support plate 10 limits the lower end of the filter layer 8. The upper end of the support pipe 7 is provided with a support pipe positioning rod 7-1, and the filter element upper cover 8-2 of the filter layer 8 is provided with a support pipe positioning hole 8-1. The support pipe 7 and the filter layer 8 are fixed by the support pipe positioning rod 7-1 and the support pipe positioning hole 8-1. An oil guide pipe 5 is connected below the support plate 4; inside the cylinder 1, a vertical rectifying plate 9 is installed in front of the outlet pipe 1-2 to rectify the exhaust gas.

[0034] The specific implementation of the gas storage gas injection compressor deoiler with a plug-in filter element at the exhaust end of the gas storage gas injection compressor is as follows: The compressed natural gas-lubricating oil mixture flowing from the exhaust end of the compressor enters the cylinder 1 through the inlet pipe 1-1; After the gas-liquid mixture enters, it hits the arc-shaped inwardly concave inlet baffle 3. The oil droplets with larger particle sizes in the mixture adhere to the inner wall of the inlet baffle 3, aggregate and spread on the inner wall of the inlet baffle 3 to form an oil film, and then flow down along the inlet baffle 3. After converging on the wing edge below the inlet baffle 3, it drips down from both sides of the wing edge and reaches the bottom of the oil remover cylinder 1. After the gas-liquid mixture collides with the vertical baffle (i.e., the bottom edge of the inlet baffle 3), it is divided into two streams, flows out from both sides of the bottom edge of the inlet baffle 3, moves along the arc-shaped inner wall surface (i.e., the bottom edge of the inlet baffle 3) for a certain distance, and then merges into the interior of the primary separation chamber 1-4, and then flows upward along the pressure difference; The oil-gas mixture moving in the primary separation chamber 1-4 continuously collides with the wall of the cylinder 1, so the oil droplets therein continuously gather on the wall of the cylinder 1, and after the liquid film is formed, it flows along the wall of the cylinder to the bottom of the cylinder 1. When the lubricating oil at the bottom of the primary separation chamber 1-4 accumulates to a certain amount, it is discharged through the discharge control operation; The gas-liquid mixture enters the support tube 7 along the openings on the support plate 4, then flows out from the pores (i.e., the filter holes 6) of each support tube and is filtered through the filter element installed outside the support tube 7. The oil droplets are filtered and aggregated by the filter cotton, and after forming a liquid film, they flow downward along the surface of the filter element to the support disk, and then flow to the support plate 4 below. The oil flowing down from the filter element gathers on the support plate 4 below. After a certain amount of the oil accumulates on the support plate, it enters the oil guide pipe 5 and flows out to the outside of the cylinder 1 along the oil guide pipe.

[0035] The clean gas coming out from the side of the filter element continues to flow upward, bypasses the rectifier plate, and is discharged from the outlet pipe.

[0036] Simulation results: like Figure 6 As shown, the present invention studies and designs the original model and the improved model of this embodiment, the original model 1 and the model 2 with a porosity of 0.475 used in the present invention, and the simulated fluid is natural gas. Under the operating conditions of the gas storage, the velocity of the gas inlet of the center tube at the bottom of the filter element is between 0.5 and 3.0 m / s. Therefore, the flow field of the gas is simulated mainly under the conditions of gas velocity of 0.5m / s and 3.0m / s, and the results are obtained. Figure 8 and Fig. 9 The simulation results are shown in Figure 2.

[0037] according to Figure 8In the original structure diagram (i.e., model 1), the high-speed area of ​​the gas phase flow field is concentrated in the lower 1 / 3 of the filter element, and the gas outflow speed decreases with the increase of height, while the gas escapes from the side of the middle and upper filter element and enters the filter layer at a speed of only about 0.18 m / s, resulting in a large difference in the flow speed of the internal gas. This situation will cause a large number of oil droplets to gather in the middle and lower part of the filter element, thereby reducing efficiency. At the same time, the exhaust gas speed is uneven, which leads to insufficient use of the filter element, reduced efficiency and shortened life. In the new structure (i.e., model 2) provided by the present invention, after the gas flow enters from the bottom, it diffuses and flows upward, so that in the entire height section, when the gas flow flows out from the side, the speed is relatively evenly distributed around 0.3 m / s. The gap left between the support tube and the filter layer can make the gas-liquid mixture more uniform in the process of passing to the filter element. Moreover, in the working process of the original model, the pressure is mainly concentrated at the lower end of the tube body, and the maximum pressure difference is about 700Pa. In this model, the tube body is under pressure more evenly, and the maximum pressure difference is about 1080Pa. The pressure drop of the two structures is not much different, but the flow field of the new structure has been significantly improved, and the pressure inside the tube body is more evenly distributed, which is conducive to the circulation of gas.

[0038] Model 2 of the present invention has demonstrated sufficient high efficiency in the simulation. The improved model allows the gas to be evenly discharged from the filter element for filtration. The tube body is evenly pressurized and the difference in exhaust gas velocity is small, which can effectively extend the life and improve efficiency, thereby proving the feasibility of the present invention.

[0039] In summary, the present invention innovates and improves the structure of the filter element of the gas storage reservoir gas injection compressor deoiler. Its main feature is to extend the original short support tube and change it into a leakage tube with holes on the surface, add a positioning rod on the top, and add a support plate on the bottom, so that the gas can flow out evenly from the pores of the support tube during the filtering process, and the filter element can be fully utilized. The filter screen and the filter cover are combined into a filter layer, and the positioning holes between the filter layer and the support tube prevent the filter layer from rotating due to the airflow, increase stability, and facilitate positioning, installation, and replacement of the filter layer. The improvement of this structure can promote the uniform passage of the gas-liquid mixture through the filter element, effectively improve the utilization rate of the filter element, improve the filtration efficiency, and facilitate the replacement of the filter layer, which is convenient for operation and reduces costs.

[0040] The above content is a further detailed description of the present invention. It cannot be determined that the specific implementation methods of the present invention are limited to these. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, they can also make several simple deductions or substitutions, which should be regarded as belonging to the protection scope of the present invention determined by the submitted claims.

Claims

1. A gas storage gas injection compressor deoiler with a cannulated filter element, characterized in that: The invention comprises a cylinder (1), the inner cavity of the cylinder (1) is provided with a support plate (4), the chamber in the cylinder (1) below the support plate (4) is used as a primary separation chamber (1-4), an oil guide pipe (5) is provided on the support plate (4), an inlet pipe (1-1) is provided on the cylinder (1) at the primary separation chamber (1-4), and a sewage discharge pipe (1-3) is provided at the bottom of the cylinder (1); A filter element assembly is provided on the upper part of the support plate (4) in the cylinder (1); a through hole is provided on the support plate (4) for allowing the gas-liquid mixture to flow into the filter element assembly; and an outlet pipe (1-2) is provided on the upper part of the filter element assembly in the cylinder (1); The filter element assembly comprises a filter unit, the filter unit comprising a support tube (7) and a filter layer (8) fixedly sleeved on the outside of the support tube (7), the support tube (7) extending from the bottom of the filter layer (8) to the top of the filter layer (8), a plurality of filter holes (6) are provided on the support tube (7) in an area corresponding to the filter layer (8), and the filter layer (8) and the top of the support tube (7) are sealed.

2. The oil remover for gas storage gas injection compressor with a plug-in filter element according to claim 1, characterized in that: A filter element limiting support ring (10) for limiting the lower end of the filter layer (8) is provided on the support tube (7), the filter element limiting support ring (10) comprising a plurality of concentric and spaced circular rings (10-1), the plurality of circular rings (10-1) being fixedly connected via a connecting bracket (10-2).

3. The oil remover for gas storage gas injection compressor with a plug-in filter element according to claim 1, characterized in that: A support tube positioning rod (7-1) is provided at the top of the support tube (7), a filter layer positioning hole (8-1) adapted to the support tube positioning rod (7-1) is provided at the top of the filter layer (8), and the support tube positioning rod (7-1) extends into the filter layer positioning hole (8-1).

4. The oil remover for gas storage gas injection compressor with a plug-in filter element according to claim 3, characterized in that: The filter layer (8) comprises a filter element (8-3) and a filter element upper cover (8-2); the filter element (8-3) is sleeved on the outside of the support tube (7); the filter element upper cover (8-2) is arranged at the upper end of the filter element (8-3); and the filter layer positioning hole (8-1) is provided on the filter element upper cover (8-2).

5. The gas storage gas injection compressor deoiler with a cannulated filter element according to claim 1, characterized in that: A gap (7-2) is provided between the outer wall of the support tube positioning rod (7-1) and the inner wall of the filter layer (8).

6. The oil remover for gas storage gas injection compressor with a plug-in filter element according to claim 5, characterized in that: The size of the gap (7-2) is 2mm~3mm.

7. The oil remover for gas storage gas injection compressor with a cannulated filter element according to claim 1, characterized in that: The plurality of filter holes (6) are evenly distributed in an array on the support tube (7).

8. The oil remover for gas storage gas injection compressor with a plug-in filter element according to claim 1, characterized in that: The filter element assembly comprises a plurality of filter units arranged in parallel with each other.

9. The gas storage gas injection compressor deoiler with a cannulated filter element according to claim 1, characterized in that: The inner cavity of the cylinder (1) is provided with a U-shaped inlet baffle (3) at the outlet side of the inlet pipe (1-1); the bottom edge of the inlet baffle (3) is arc-shaped; the concave side of the bottom edge of the inlet baffle (3) is directly opposite to the outlet side of the inlet pipe (1-1); and the two wing edges of the inlet baffle (3) are respectively located at the upper and lower sides of the outlet side of the inlet pipe (1-1).

10. The gas storage gas injection compressor deoiler with a cannulated filter element according to claim 1, characterized in that: The inner cavity of the cylinder (1) is provided with a rectifying plate (9) on the inlet side of the outlet pipe (1-2).

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