A separator suitable for salt cavern compressed air energy storage power stations

Abstract

This invention discloses a separator suitable for compressed air energy storage power stations in salt caverns. The top sidewall of the cylinder is connected to an exhaust pipe and an intake pipe, respectively. The inner cavity of the cylinder is equipped with a tapered feeding device, the large end of which is connected to the outlet end of the intake pipe. The feeding device includes several spaced-apart horn-shaped guide vanes, the concave surface of which is the windward side. An airflow channel is formed between adjacent horn-shaped guide vanes. The narrow end of the horn-shaped guide vane faces the airflow output side of the intake pipe, and the tangent of the narrow end forms an acute angle with the center line of the feeding device. For adjacent horn-shaped guide vanes, the diameter of the narrow end of the preceding horn-shaped guide vane is larger than that of the following horn-shaped guide vane, and the diameter of the wide end of the preceding horn-shaped guide vane is larger than that of the following horn-shaped guide vane. This invention can process compressed air at inter-plant pipelines, enabling efficient separation of solid and liquid impurities.

Description

Technical Field

[0001] This invention belongs to the field of energy storage equipment, specifically relating to a separator suitable for salt cavern compressed air energy storage power stations. Background Technology

[0002] Compressed air energy storage power stations have broad application prospects due to their advantages such as large energy storage capacity, long operating life, and environmental friendliness. The gas storage facility is the core component of a compressed air energy storage system, an integrated underground and surface system used for gas injection, storage, and extraction, often likened to an "underground granary" in the energy sector. Gas storage facilities are mostly constructed underground, utilizing various geological conditions. Salt cavern gas storage facilities, for example, are converted from cavities formed after salt mine extraction, offering excellent sealing and strong pressure resistance.

[0003] The core principle of compressed air energy storage in salt caverns includes three stages: compressed air energy storage, energy preservation in the gas storage tank, and high-pressure air energy release. The injection and extraction pipes and inter-plant gas transmission pipelines, which handle the intake and exhaust of compressed air into and from the gas storage tank, are crucial connecting links ensuring the orderly coordination between the above-ground power plant and the underground gas storage tank. Due to the frequent alternation of compressed air injection and extraction cycles, the pressure and temperature variations on the inner wall of the pipelines are significant, severely impacting pipeline lifespan and system stability. Furthermore, natural salt caverns are rich in salt rock debris, high-humidity brine, and corrosive gases such as H2S, which can erode and corrode the inner walls of the pipelines, compressor impellers, expander blades, and other critical components, seriously affecting the safety of core equipment.

[0004] The corrosion problem of gas-side equipment in existing compressed air energy storage power plants under salt cavern gas storage conditions mainly manifests as: accelerated corrosion rates of metal materials such as injection and production pipelines and inter-plant gas transmission pipelines; corrosion and blockage of equipment such as heat exchangers; resulting in shortened equipment lifespan, increased maintenance costs, reduced power plant operating efficiency, and even potential safety accidents. This problem seriously restricts the safe and stable operation of compressed air energy storage power plants, affecting their economic efficiency and reliability. Summary of the Invention

[0005] To address the problems existing in the prior art, the purpose of this invention is to provide a separator suitable for salt cavern compressed air energy storage power stations. This invention enables the processing of compressed air at the inter-plant pipeline, which not only efficiently separates solid and liquid impurities but also plays a role in guiding and stabilizing the flow, uniformly distributing the airflow, and buffering.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A separator suitable for a salt cavern compressed air energy storage power station includes a cylindrical body. An exhaust pipe is connected to the top of the cylindrical body, and an air inlet pipe is connected to the side wall of the cylindrical body. A tapered feeding device is provided inside the cylindrical body, with its large end connected to the outlet end of the air inlet pipe. The feeding device includes several spaced-apart horn-shaped guide vanes. The concave surface of each horn-shaped guide vane is the windward side, and an airflow channel is formed between adjacent horn-shaped guide vanes. The narrow end of each horn-shaped guide vane faces the airflow output side of the air inlet pipe, and the angle between the tangent of the narrow end of the horn-shaped guide vane and the centerline of the feeding device is acute. Along the direction of airflow at the outlet end of the air inlet pipe, for adjacent horn-shaped guide vanes, the diameter of the narrow end of the preceding horn-shaped guide vane is larger than the diameter of the narrow end of the following horn-shaped guide vane, and the diameter of the wide end of the preceding horn-shaped guide vane is larger than the diameter of the wide end of the following horn-shaped guide vane.

[0007] Preferably, the angle between the tangent at the wide end of the horn-shaped guide vane and the center line of the feeding device is 90°-110°.

[0008] Preferably, the tangent at the wide end of the horn-shaped guide vane forms a 90° angle with the center line of the feeding device.

[0009] Preferably, for adjacent horn-shaped guide vanes, the preceding horn-shaped guide vane is parallel to the following horn-shaped guide vane.

[0010] Preferably, the narrow end edges of all the horn-shaped guide vanes are on the same straight line, and the angle between this straight line and the center line of the feeding device is 8°-10°.

[0011] Preferably, the cross-sectional shape of the horn-shaped guide vane along its central axis is a circular arc.

[0012] Preferably, the feeding device further includes an annular bracket and an axial support beam. Each horn-shaped guide vane has an annular bracket on one side of its narrow end. The annular bracket is coaxially arranged with the horn-shaped guide vane, and the annular bracket and the concave surface of the horn-shaped guide vane are fixedly connected by the axial support beam. The annular bracket connected to the horn-shaped guide vane at the large end of the feeding device is connected to the outlet end of the air inlet pipe. Along the direction of airflow at the outlet end of the air inlet pipe, for adjacent horn-shaped guide vanes, the annular bracket connected to the next horn-shaped guide vane is connected to the convex surface of the previous horn-shaped guide vane.

[0013] Preferably, the annular support provided on one side of the narrow end of each horn-shaped guide vane is connected to the concave surface of the horn-shaped guide vane by a number of axial support beams. The axial support beams are parallel to the central axis of the annular support and are connected to the middle of the concave surface of the horn-shaped guide vane.

[0014] Preferably, the central axis of the feeding device is perpendicular to the central axis of the cylinder, and the distance between the small end of the feeding device and the inner wall of the cylinder is 0.8-0.9 times the diameter of the cylinder. The horn-shaped guide vane at the small end of the feeding device is the end horn-shaped guide vane. The convex surface of the end horn-shaped guide vane is coaxially connected to an annular support. The diameter of the annular support is smaller than the diameter of the annular support connected to the narrow end of the end horn-shaped guide vane, but larger than the diameter of the narrow end of the end horn-shaped guide vane.

[0015] Preferably, the surface of the feeding device and the inner wall of the cylinder are both coated with an anti-corrosion layer, and a drain outlet is provided at the bottom of the cylinder.

[0016] The present invention has the following beneficial effects: This invention relates to a separator in a salt cavern compressed air energy storage power station. It utilizes a tapered feeding device installed between the air inlet pipe on the side wall of the cylinder and the inner cavity of the cylinder. The larger end of the feeding device is connected to the outlet end of the air inlet pipe. Several spaced-apart horn-shaped guide vanes in the feeding device have their concave surfaces facing the airflow, forming airflow channels between adjacent horn-shaped guide vanes. The narrow ends of the horn-shaped guide vanes face the airflow output side of the air inlet pipe, and their tangents form an acute angle with the centerline of the feeding device. Simultaneously, along the direction of airflow at the outlet end of the air inlet pipe, the diameters of the narrow and wide ends of adjacent horn-shaped guide vanes are designed to gradually decrease in size, with the narrow end being larger than the wide end. This structural design has significant technical advantages. The specific principle is as follows: The gas-liquid mixture containing impurities such as salt rock fragments and high-moisture brine introduced through the air inlet pipe impacts the narrow ends of the horn-shaped guide vanes and flows along the concave surface of the vanes. Utilizing the inertial difference between solid-liquid impurities and gas, gas-liquid flow is achieved. The initial gas-solid separation allows impurities to converge along the blade surface, effectively preventing them from eroding and corroding subsequent pipelines and core equipment. The progressively smaller, trumpet-shaped guide vanes, matched with the tapered feed device, guide the airflow in a tiered manner, allowing it to gradually diffuse across a wider cross-section and achieve uniform circumferential airflow distribution. This avoids sudden velocity changes caused by high-speed airflow directly impacting the inner wall of the cylinder, reducing flow field defects such as eddies and dead zones, and mitigating pipeline lifespan losses due to pressure and temperature fluctuations. Simultaneously, the curved surface of the trumpet-shaped guide vanes buffers the impact force of the fluid, and the smooth connection structure between the feed device, inlet pipe, and cylinder reduces local resistance and additional pressure loss. While ensuring efficient solid-liquid separation and uniform airflow distribution, this minimizes pressure drop loss, improves power plant operating efficiency, and solves the core problems of impurity corrosion, airflow turbulence, and excessive pressure drop in existing technologies, achieving comprehensive optimization of separation efficiency, pressure drop, and outlet velocity uniformity. Attached Figure Description

[0017] Figure 1 This is an overall structural diagram of the separator applicable to a salt cavern compressed air energy storage power station in an embodiment of the present invention.

[0018] Figure 2 This is an internal cross-sectional view of a separator suitable for a salt cavern compressed air energy storage power station in an embodiment of the present invention.

[0019] Figure 3 This is an overall appearance view of the feeding device in an embodiment of the present invention.

[0020] Figure 4 This is an axial cross-sectional view of the feeding device in an embodiment of the present invention.

[0021] Figure 5 This is a structural dimension diagram of the feeding device in an embodiment of the present invention.

[0022] Figure 6 This is a structural diagram of the ring bracket and axial support beam connected in an embodiment of the present invention.

[0023] Figure 7 This is a structural diagram of a single horn-shaped guide vane in an embodiment of the present invention.

[0024] Figure 8(a) is a velocity cloud diagram of the feed device cross section (vertical cross section at the inlet center) in an embodiment of the present invention.

[0025] Figure 8(b) is a velocity cloud diagram of the feed device cross section (horizontal cross section at the inlet center) in an embodiment of the present invention.

[0026] Figure 9 This is a cloud diagram showing the outlet velocity of the feeding device in an embodiment of the present invention.

[0027] In the diagram: 1-Cylinder, 1-1-Inlet pipe, 1-2-Exhaust pipe, 1-3-Drain outlet, 6-Feeding device, 6-1-Axial support beam, 6-2-Annular bracket, 6-3-French-shaped guide vane, 6-3-1-Airflow channel, 6-3-2-Concave surface, 6-3-3-Convex surface, 6-3-4-Narrow end, 6-3-5-Wide end, 6-4-Front-end fixed annular bracket, 6-5-Bolt hole. Detailed Implementation

[0028] The specific embodiments of this application will be described in detail below. Based on these detailed descriptions, those skilled in the art will be able to clearly understand and implement this application. Without departing from the principles of this application, features in various embodiments can be combined to obtain new implementations, or certain features in some embodiments can be substituted to obtain other preferred implementations.

[0029] See Figures 1-4 as well as Figure 7This embodiment is applicable to the separator of a salt cavern compressed air energy storage power station, including a cylinder 1. The top of the cylinder 1 is connected to an exhaust pipe 1-2, and the side wall of the cylinder 1 is connected to an air inlet pipe 1-1. The inner cavity of the cylinder 1 is provided with a tapered feeding device 6, and the large end of the feeding device 6 is connected to the outlet end of the air inlet pipe 1-1. The feeding device 6 includes a number of spaced-apart horn-shaped guide vanes 6-3. The concave surface of the horn-shaped guide vanes 6-3 is the windward surface, and an airflow channel 6-3-1 is formed between adjacent horn-shaped guide vanes 6-3 (see...). Figure 3 and Figure 4 The narrow end of the horn-shaped guide vane 6-3 faces the airflow output side of the inlet pipe 1-1, and the tangent of the narrow end of the horn-shaped guide vane 6-3 makes an acute angle with the center line of the feeding device 6. Along the direction of airflow at the outlet end of the inlet pipe 1-1, for adjacent horn-shaped guide vanes 6-3, the diameter of the narrow end of the previous horn-shaped guide vane 6-3 is larger than the diameter of the narrow end of the next horn-shaped guide vane 6-3, and the diameter of the wide end of the previous horn-shaped guide vane 6-3 is larger than the diameter of the wide end of the next horn-shaped guide vane 6-3.

[0030] The working process of the separator in the above embodiment of the present invention applicable to a salt cavern compressed air energy storage power station is as follows: A gas-liquid mixture containing impurities such as salt rock fragments and high-moisture brine flows in from the horizontally arranged inlet pipe 1-1 and enters the tapered feeding device 6 through the outlet end of the inlet pipe 1-1. Because the feeding device 6 is equipped with several spaced-apart trumpet-shaped guide vanes 6-3, and the concave surface of the trumpet-shaped guide vanes 6-3 is the windward side, with the narrow end facing the airflow output side of the inlet pipe 1-1, and the angle between the tangent of its narrow end and the center line of the feeding device 6 is an acute angle, and along the airflow direction at the outlet end of the inlet pipe 1-1, the diameters of the narrow and wide ends of adjacent trumpet-shaped guide vanes 6-3 are designed to gradually decrease from front to back, so after the gas-liquid mixture enters the feeding device 6, the edge area of ​​the concentrated airflow will first impact the first layer of trumpet-shaped guide vanes. The airflow flows from the narrow end of the trumpet-shaped guide vane 6-3, and then along the concave surface of the trumpet-shaped guide vane 6-3. The remaining airflow continues to flow forward. When it reaches the narrow end of the second layer of trumpet-shaped guide vanes 6-3, the edge region of the airflow is again influenced by the flow of the second layer along the concave surface of the trumpet-shaped guide vane 6-3. This process continues until the airflow reaches the narrow end of the last layer of trumpet-shaped guide vanes 6-3, where the edge region of the airflow is again influenced by the flow of the last layer along the concave surface of the trumpet-shaped guide vane 6-3. The remaining airflow then rushes towards the wall of the cylinder 1. Because the inertia of solid and liquid impurities such as droplets is much greater than that of gases, during the movement along the arc-shaped vanes (i.e., trumpet-shaped guide vanes), the solid and liquid impurities are initially separated from the gases. The separated liquid phase gradually converges along the surface of the trumpet-shaped guide vane 6-3, while the gas phase continues to flow along the path guided by the trumpet-shaped guide vane 6-3. Meanwhile, after passing through the first layer of trumpet-shaped guide vanes 6-3, the peripheral airflow is divided into multiple streams through the airflow channel 6-3-1 formed between adjacent trumpet-shaped guide vanes 6-3. The central airflow continues to move forward, flowing through the next layer of trumpet-shaped guide vanes 6-3. Because each layer of trumpet-shaped guide vanes 6-3 has a narrow end connecting to the upstream flow channel and a wide end guiding the flow, and the trumpet-shaped guide vanes 6-3 gradually decrease in size, each stage of trumpet-shaped guide vanes 6-3 guides the airflow to diffuse towards a wider cross-section, avoiding the abrupt process of high-speed airflow directly impacting the wall of the cylinder 1. Each time the airflow flows through a layer of trumpet-shaped guide vanes 6-3, a portion of the gas-liquid mixture is separated and diverted, causing the airflow rate in the central area of ​​the feeding device 6 to gradually decrease with the increase of the guide vane level, ultimately achieving hierarchical diversion and circumferential uniform distribution of the airflow. During this process, the curved surface of the trumpet-shaped guide vane 6-3 provides a contact interface for gas-liquid separation and buffers the impact force of the fluid, avoiding flow field defects such as eddies and dead zones that are prone to occur in disordered flow. It reduces the local resistance caused by sudden changes in flow velocity and the additional pressure loss caused by flow field turbulence from the root. While achieving preliminary separation of gas-liquid and gas-solid, it ensures uniform distribution of airflow out of the feed device 6 and significantly reduces pressure drop loss.

[0031] In a preferred embodiment of the present invention, the tangent at the wide end of the trumpet-shaped guide vane 6-3 forms an angle of 90°-110° with the center line of the feeding device 6. Under this design, when the gas-liquid mixture flows through the trumpet-shaped guide vane 6-3, the gas-liquid separation is achieved on the concave surface of the vane's arc, thanks to the inertial difference between solid-liquid impurities and the gas. The angle at the narrow end is designed to buffer the airflow impact and smoothly guide the airflow, while the 90°-110° angle at the wide end guides the airflow to diffuse towards the wide cross-section. Combined with the progressively smaller vane layout, this allows for tiered airflow distribution, gradually reducing the airflow flow rate in the central area of ​​the feeding device 6, ultimately achieving a uniform circumferential distribution of the airflow. Simultaneously, the arc-shaped surface of the trumpet-shaped guide vane 6-3 provides a sufficient gas-liquid separation interface while avoiding excessively abrupt airflow changes or insufficient distribution. This reduces local resistance caused by sudden velocity changes and additional pressure loss due to flow field turbulence, achieving a comprehensive balance between separation efficiency, airflow uniformity, and pressure drop loss.

[0032] As a further preferred embodiment of the above embodiments, in this embodiment, see [reference needed]. Figure 5 The tangent at the wide end of the trumpet-shaped guide vane 6-3 forms a 90° angle with the center line of the feeding device 6.

[0033] As a preferred embodiment of the present invention, in this embodiment, see [reference needed]. Figure 5For adjacent horn-shaped guide vanes 6-3, the preceding horn-shaped guide vane 6-3 is parallel to the following horn-shaped guide vane 6-3. The structural design of this embodiment can adapt to the hierarchical flow splitting and gas-liquid separation functions of the horn-shaped guide vanes 6-3, while further optimizing flow field stability and reducing pressure drop loss. As mentioned above, the main function of the horn-shaped guide vanes 6-3 is to achieve gas-liquid separation by utilizing the inertial difference between solid-liquid impurities and gas, guiding the airflow hierarchically through a progressively smaller size layout, ultimately achieving a uniform circumferential distribution of airflow and reducing local resistance and additional pressure loss. By arranging adjacent horn-shaped guide vanes 6-3 in a parallel configuration, the airflow channel 6-3-1 formed between adjacent vanes maintains a constant cross-section. This ensures stable airflow velocity as the airflow passes through the channel, avoiding sudden velocity changes caused by variations in the channel cross-section. This reduces local resistance caused by velocity fluctuations, further minimizing local resistance caused by velocity changes and additional pressure loss due to flow field turbulence. Furthermore, the parallel arrangement of the vanes ensures consistent airflow guidance across each layer. Combined with the progressively smaller vane dimensions, this allows the central airflow to gradually diffuse circumferentially, achieving uniform hierarchical flow distribution. This avoids flow field defects such as airflow deviation and eddies caused by inconsistent vane tilt angles, ensuring a uniform circumferential airflow distribution. Simultaneously, the constant cross-section airflow channel 6-3-1 allows the gas-liquid mixture to flow smoothly within the channel, ensuring that solid-liquid impurities such as droplets can fully converge along the concave surface of the vanes for efficient separation. This approach does not affect gas-liquid separation efficiency and further reduces pressure drop loss by stabilizing the flow field.

[0034] In a preferred embodiment of the present invention, in this embodiment, the narrow-mouth edges of all the horn-shaped guide vanes 6-3 are on the same straight line, and the angle between this straight line and the center line of the feeding device 6 is 8°-10°. Figure 5As can be visually observed, the straight-line layout of the narrow-mouth edges of all the trumpet-shaped guide vanes 6-3 provides a structural foundation for the smooth introduction of airflow. When the gas-liquid mixture flows out of the inlet pipe 1-1, it can uniformly impact the narrow-mouth edges of each layer of trumpet-shaped guide vanes 6-3, avoiding flow field turbulence caused by airflow deviation, ensuring the consistency of flow guidance and gas-liquid separation effect of each layer of vanes. Combined with the design of adjacent vanes being parallel and gradually decreasing in size, a more uniform hierarchical flow splitting is achieved. The angle between the straight line and the centerline of the feeding device 6 is designed to be 8°-10°. This small angle allows the airflow to be smoothly introduced along the narrow end, avoiding impact losses caused by the high-speed airflow directly impacting the blades and reducing local resistance. This further reduces the local resistance caused by sudden changes in flow velocity and the additional pressure loss caused by flow field turbulence. Simultaneously, the slightly tilted guiding action directs the airflow gradually towards the wide end of the trumpet-shaped guide vane 6-3, laying the foundation for subsequent circumferential airflow splitting and uniform distribution. This does not affect the convergence and separation of solid and liquid impurities such as droplets along the concave surface of the blades, ensuring that the gas-liquid separation efficiency is not affected. Therefore, the design of this embodiment further achieves a comprehensive balance between separation efficiency, airflow uniformity, and pressure drop loss.

[0035] As an optional embodiment of the present invention, in this embodiment, the cross-sectional shape of the horn-shaped guide vane 6-3 along its central axis is a circular arc.

[0036] As an optional embodiment of the present invention, see [link to relevant documentation]. Figures 2-6In this embodiment, the feeding device 6 further includes an annular bracket 6-2 and an axial support beam 6-1. The annular bracket 6-2 and the axial support beam 6-1 are used to fix several spaced-apart horn-shaped guide vanes 6-3 into a single structure, thus forming the entire feeding device 6. Specifically, an annular bracket 6-2 is provided on one side of the narrow end of each horn-shaped guide vane 6-3. The annular bracket 6-2 is coaxially arranged with the horn-shaped guide vane 6-3, and the annular bracket 6-2 is fixedly connected to the concave surface of the horn-shaped guide vane 6-3 via the axial support beam 6-1. The annular bracket 6-2 connected to the horn-shaped guide vane 6-3 at the large end of the feeding device 6 is connected to the outlet end of the air inlet pipe 1-1. Along the direction of airflow at the outlet end of the air inlet pipe 1-1, for adjacent horn-shaped guide vanes 6-3, the annular bracket 6-2 connected to the next horn-shaped guide vane 6-3 is connected to the convex surface of the previous horn-shaped guide vane 6-3. In this embodiment, the annular support 6-2 serves two purposes: firstly, it provides a connection; secondly, it guides airflow and collects liquid. After the airflow passes through each layer of trumpet-shaped guide vanes 6-3, the central airflow continues forward, while the peripheral airflow is diverted and flows out. The annular support 6-2 guides the airflow flowing along the convex surface of the vanes to the narrow end of the next layer of vanes, ensuring that the airflow enters the next layer of vanes in an orderly manner for further separation and diversion. This avoids airflow deviation from the preset path, preventing flow field defects such as eddies and dead zones. It ensures the continuity and uniformity of the hierarchical diversion and further reduces additional pressure loss, thus achieving the goal of uniform airflow distribution and reduced pressure drop. Furthermore, the annular support 6-2 helps collect liquid collected on the vane surface, preventing liquid from entering the next layer of vanes or subsequent pipes with the airflow. This further improves gas-liquid separation efficiency, reduces liquid corrosion and erosion of the equipment, and works synergistically with the gas-liquid separation function of the vanes to enhance the overall performance of the separator.

[0037] As an optional embodiment of the present invention, see [link to relevant documentation]. Figures 3-6 In this embodiment, the annular bracket 6-2 corresponding to the narrow end of each horn-shaped guide vane 6-3 is connected to the concave surface of the horn-shaped guide vane 6-3 by several axial support beams 6-1. The axial support beams 6-1 are parallel to the central axis of the annular bracket 6-2, and the axial support beams 6-1 are connected to the middle of the concave surface of the horn-shaped guide vane 6-3.

[0038] As an optional embodiment of the present invention, see [link to relevant documentation]. Figure 2In this embodiment, the central axis of the feeding device 6 is perpendicular to the central axis of the cylinder 1, and the distance between the small end of the feeding device 6 and the inner wall of the cylinder 1 is 0.8-0.9 times the diameter of the cylinder 1. The horn-shaped guide vane 6-3 at the small end of the feeding device 6 is the end horn-shaped guide vane. The convex surface of the end horn-shaped guide vane is coaxially connected to an annular support 6-2. The diameter of the annular support 6-2 is smaller than the diameter of the annular support connected to the narrow end of the end horn-shaped guide vane, but larger than the diameter of the narrow end of the end horn-shaped guide vane. In this embodiment, the feeding device 6 is arranged perpendicular to the central axis of the cylinder 1, which allows the airflow after being diverted by the end trumpet-shaped guide vanes to diffuse into the cylinder 1 in a direction perpendicular to the central axis of the cylinder 1. This avoids the airflow concentrating in a local area of ​​the cylinder 1, further ensuring the effect of uniform circumferential distribution of the airflow. At the same time, it allows the airflow to have more flow space in the cylinder 1, reducing eddies and additional pressure loss caused by airflow congestion. In addition, this vertical layout allows the feeding device 6 to ensure that the gas-liquid mixture can be smoothly introduced into the feeding device 6 after being introduced through the air inlet pipe 1-1 to complete the stratified separation, laying the foundation for subsequent airflow diffusion and impurity separation. The distance between the small end of the feeding device 6 and the inner wall of the cylinder 1 is set to 0.8-0.9 times the diameter of the cylinder 1. This is an optimal design that balances airflow diffusion and impurity collection. This distance avoids the narrow airflow space caused by the small end of the feeding device 6 being too close to the inner wall of the cylinder 1, preventing sudden changes in airflow velocity from causing local resistance. It also avoids the airflow diffusion being too dispersed due to the distance being too far, ensuring that the airflow after being diverted by the end trumpet-shaped guide vane can flow smoothly in the cylinder 1. At the same time, it provides sufficient space for the separated liquid phase impurities to converge, preventing impurities from being mixed again with the airflow, and further improving the gas-liquid separation efficiency. The annular support 6-2, coaxially connected to the convex surface of the end trumpet-shaped guide vane, has a diameter smaller than that of the annular support connected to the narrow end of the end trumpet-shaped guide vane but larger than that of the narrow end of the end trumpet-shaped guide vane. On the one hand, the annular support 6-2 can ensure the stability of the flow diversion effect of the end vane, providing a final guarantee for the tiered flow diversion of the entire feeding device 6. On the other hand, the annular support 6-2 can guide the airflow after being diverted by the end trumpet-shaped guide vane to diffuse smoothly into the interior of the cylinder 1, avoiding the airflow turning too sharply and generating eddies, thus reducing additional pressure loss. At the same time, the annular support 6-2 can help collect the liquid phase impurities gathered on the surface of the end vane, preventing impurities from entering the depth of the cylinder 1 or subsequent pipes with the airflow, further enhancing the gas-liquid separation effect.

[0039] As a preferred embodiment of the present invention, see Figure 1 In this embodiment, the surface of the feeding device 6 and the inner wall of the cylinder 1 are both provided with anti-corrosion layer, and the bottom of the cylinder 1 is provided with a drain port 1-3. The liquid, solid and other impurities separated in the cylinder 1 can be discharged periodically through the drain port 1-3.

[0040] As a preferred embodiment of the present invention, in this embodiment, the parts of the separator that come into contact with humid air, including the feeding device and the inner wall of the cylinder, are all protected by laser cladding for corrosion protection. The thickness of the laser cladding layer is 0.05-1mm, and the surface roughness can reach Ra25 μm. It is high-quality, highly applicable, efficient, and low-cost, and can meet the requirements of corrosion testing under working conditions.

[0041] Example This embodiment applies to the separator of a salt cavern compressed air energy storage power station, including a cylindrical body 1. An exhaust pipe 1-2 is connected to the top of the cylindrical body 1, and an air inlet pipe 1-1 is connected to the side wall of the cylindrical body 1. The inner cavity of the cylindrical body 1 is equipped with a tapered feeding device 6. The feeding device 6 includes trumpet-shaped guide vanes 6-3, annular supports 6-2, and axial support beams 6-1. Specifically, ten trumpet-shaped guide vanes 6-3 are arranged, and these ten spaced-apart trumpet-shaped guide vanes 6-3 are fixed into a single structure using the annular supports 6-2 and the axial support beams 6-1, thus forming the entire feeding device 6. The annular supports 6-2 corresponding to the trumpet-shaped guide vanes 6-3 located at the large end of the feeding device 6 are bolted to the outlet end of the air inlet pipe 1-1. Each annular support 6-2 connects to six axial support beams 6-1, and the six axial support beams 6-1 are evenly distributed circumferentially on the annular support 6-2. The axial support beam 6-1 is parallel to the central axis of the annular bracket 6-2, and is connected to the middle of the concave surface of the trumpet-shaped guide vane 6-3. The convex surface of the end trumpet-shaped guide vane is coaxially connected to an annular bracket 6-2. The annular bracket 6-2 is welded and fixed to the axial support beam 6-1 and the trumpet-shaped guide vane 6-3. The arc and radius of curvature of each layer of blades (i.e., trumpet-shaped guide vanes 6-3) are consistent. In this embodiment, the radius of each trumpet-shaped guide vane 6-3 is 150mm, and the central angle corresponding to each trumpet-shaped guide vane 6-3 is 60°. The diameters of the wide and narrow ends of the guide vanes change in a gradient (i.e., the edges of the narrow ends of all trumpet-shaped guide vanes 6-3 are on the same straight line, the edges of the wide ends of all trumpet-shaped guide vanes 6-3 are on the same straight line, the two are parallel to each other, and the angle θ between them and the center line of the feeding device 6 is 9°). The diameter decreases sequentially from the feed inlet to the end, forming a continuous tapering channel. Each layer of blades has its narrow end connected to the upstream flow channel, and the tangent at the narrow end forms a 30° acute angle with the central axis of the feeding device. The tangent at the wide end of the horn-shaped guide blades 6-3 is perpendicular to the central line of the feeding device 6. The size of the annular support corresponding to each layer of blades gradually decreases synchronously with the blades. The structural parameters of the feeding device 6 in this embodiment are as follows: Figure 5In this embodiment, the total length of the feeding device 6 is 1550 mm, the width of the annular support 6-2 (i.e., the dimension along the axial direction of the feeding device 6) is 50 mm, the radius of the largest annular support 6-2 is 340 mm, the radius of the smallest annular support 6-2 is 96 mm, the length of the axial support beam 6-1 is 110 mm, the radius of the narrow end of the largest trumpet-shaped guide vane 6-3 is 290 mm, the radius of the wide end is 419.9 mm, the distance between the edge of the wide end of the largest trumpet-shaped guide vane 6-3 and the edge of the wide end of the smallest trumpet-shaped guide vane 6-3 along the axial direction of the feeding device 6 is 1316 mm, the radius of the narrow end of the smallest trumpet-shaped guide vane 6-3 is 82.52 mm, the radius of the wide end is 212.42 mm, and the thickness of the trumpet-shaped guide vane 6-3 is 6 mm. mm, the central axis of the feeding device 6 is perpendicular to the central axis of the cylinder 1, and the distance between the annular support 6-2 of the feeding device 6 and the inner wall of the cylinder 1 is 0.9 times the diameter of the cylinder 1.

[0042] When the feed distribution device in the separator described above is used in the gas-liquid separation of compressed air in a power plant, the specific separation process is as follows: When the gas-liquid mixture enters the feeding device 6 from the horizontal pipe (i.e., the inlet pipe 1-1), the edge region of the concentrated airflow impacts the narrow end of the first layer of guide vanes (i.e., the trumpet-shaped guide vanes 6-3), and then flows along the arc-shaped vanes (i.e., the trumpet-shaped guide vanes 6-3). Due to the much greater inertia of the liquid droplets than that of the gas, gas-liquid separation is achieved during the movement along the arc-shaped vanes; the peripheral airflow is divided into multiple streams after passing through the vanes (i.e., the trumpet-shaped guide vanes 6-3) and flows out of the feeding device 6, while the central airflow continues to move forward. Each layer of guide vanes in this feeding device is configured with a narrow end connecting to the upstream flow channel and a wide end guiding the flow. As the airflow passes through one layer of vanes, a portion of the gas-liquid mixture is separated and diverted, causing the airflow rate in the central region of the feeding device to gradually decrease with the increase of the guide vanes, ultimately achieving hierarchical diversion and circumferential uniform distribution of the airflow.

[0043] This feeding device employs progressively smaller, trumpet-shaped blades. As the high-speed fluid enters axially, each stage of blades guides the airflow towards a wider cross-section, avoiding the abrupt impact of high-speed flow directly striking the wall in traditional feeding methods. This fundamentally reduces local resistance caused by sudden changes in flow velocity. Secondly, the gas-liquid mixture undergoes stratified contact at each stage of blades. The curved surface of the blades provides a contact interface for gas-liquid separation and also buffers the impact force of the fluid. Simultaneously, the separated liquid phase gradually converges along the blade surface, while the gas phase continues to flow along the path guided by the blades. This avoids flow field defects such as eddies and dead zones that easily occur in disordered flow, further reducing additional pressure loss caused by turbulent flow. During the initial separation process, this ensures both uniform distribution of the airflow exiting the feeding device and significantly reduces pressure drop losses.

[0044] This embodiment applies to the vertical cross-sectional velocity cloud diagram at the inlet center, the horizontal cross-sectional velocity cloud diagram at the inlet center, and the outlet velocity cloud diagram of the separator in a salt cavern compressed air energy storage power station, as shown in Figures 8(a), 8(b), and 8(c), respectively. Figure 9 As shown, guided by the arc-shaped guide vanes, the horizontally incident high-momentum fluid is deflected, carrying the peripheral fluid out of the device. The core fluid in the center continues to move forward, interacting sequentially with each subsequent stage of the vanes. In each interaction, momentum is redistributed and the fluid is split layer by layer. This "layer-by-layer peak shaving" flow control strategy effectively eliminates the inherent velocity peaks and momentum concentrations in the initial flow field, keeping the outlet velocity distribution below 1.3 m / s, thus achieving a uniform flow field distribution.

[0045] Based on the above scheme, the key performance characteristics of the optimized feeding device described in this embodiment are shown in Table 1: Table 1

[0046] As shown in Table 1, this tapered multi-stage flared blade feed distribution device exhibits excellent overall performance, achieving a separation efficiency of 57.11% while maintaining extremely low pressure drop and good velocity uniformity. This device transforms a single high-speed axial jet into a multi-stage radial flow distribution. This segmented flow distribution strategy effectively alleviates the problem of localized high-pressure areas. Simultaneously, the layered flow distribution ensures a high degree of uniformity in the outlet flow distribution.

[0047] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A separator suitable for salt cavern compressed air energy storage power stations, characterized in that, Includes a cylinder (1), the top of which is connected to an exhaust pipe (1-2), and the side wall of which is connected to an air inlet pipe (1-1). The inner cavity of the cylinder (1) is provided with a tapered feeding device (6), the large end of which is connected to the outlet end of the air inlet pipe (1-1). The feeding device (6) includes several spaced-apart horn-shaped guide vanes (6-3), the concave surface of which is the windward surface, and an airflow channel (6-3-1) is formed between adjacent horn-shaped guide vanes (6-3). The narrow end of the guide vane (6-3) faces the airflow output side of the inlet pipe (1-1), and the angle between the tangent of the narrow end of the horn-shaped guide vane (6-3) and the center line of the feeding device (6) is an acute angle. Along the direction of airflow at the outlet end of the inlet pipe (1-1), for adjacent horn-shaped guide vanes (6-3), the diameter of the narrow end of the previous horn-shaped guide vane (6-3) is larger than the diameter of the narrow end of the next horn-shaped guide vane (6-3), and the diameter of the wide end of the previous horn-shaped guide vane (6-3) is larger than the diameter of the wide end of the next horn-shaped guide vane (6-3).

2. A separator suitable for salt cavern compressed air energy storage power stations according to claim 1, characterized in that, The angle between the tangent at the wide end of the horn-shaped guide vane (6-3) and the center line of the feeding device (6) is 90°-110°.

3. A separator suitable for salt cavern compressed air energy storage power stations according to claim 1 or 2, characterized in that, The tangent at the wide end of the horn-shaped guide vane (6-3) forms an angle of 90° with the center line of the feeding device (6).

4. A separator suitable for salt cavern compressed air energy storage power stations according to claim 1, characterized in that, For adjacent horn-shaped guide vanes (6-3), the first horn-shaped guide vane (6-3) is parallel to the second horn-shaped guide vane (6-3).

5. A separator suitable for salt cavern compressed air energy storage power stations according to claim 1, characterized in that, All the narrow-mouth edges of the horn-shaped guide vanes (6-3) are on the same straight line, and the angle between the straight line and the center line of the feed device (6) is 8°-10°.

6. A separator suitable for salt cavern compressed air energy storage power stations according to claim 1, characterized in that, The cross-sectional shape of the horn-shaped guide vane (6-3) along its central axis is a circular arc.

7. A separator suitable for salt cavern compressed air energy storage power stations according to claim 1, characterized in that, The feeding device (6) further includes an annular bracket (6-2) and an axial support beam (6-1). Each horn-shaped guide vane (6-3) has an annular bracket (6-2) on one side of its narrow end. The annular bracket (6-2) is coaxially arranged with the horn-shaped guide vane (6-3). The concave surfaces of the annular bracket (6-2) and the horn-shaped guide vane (6-3) are fixedly connected by the axial support beam (6-1). The annular bracket (6-2) connected to the horn-shaped guide vane (6-3) at the large end of the feeding device (6) is connected to the outlet end of the air inlet pipe (1-1). Along the direction of airflow at the outlet end of the air inlet pipe (1-1), for adjacent horn-shaped guide vanes (6-3), the annular bracket (6-2) connected to the next horn-shaped guide vane (6-3) is connected to the convex surface of the previous horn-shaped guide vane (6-3).

8. A separator suitable for a salt cavern compressed air energy storage power station according to claim 7, characterized in that, The annular support (6-2) corresponding to the narrow end of each horn-shaped guide vane (6-3) is connected to the concave surface of the horn-shaped guide vane (6-3) through several axial support beams (6-1). The axial support beams (6-1) are parallel to the central axis of the annular support (6-2) and are connected to the middle of the concave surface of the horn-shaped guide vane (6-3). Several axial support beams (6-1) are evenly distributed around the annular support (6-2).

9. A separator suitable for a salt cavern compressed air energy storage power station according to claim 7 or 8, characterized in that, The central axis of the feeding device (6) is perpendicular to the central axis of the cylinder (1), and the distance between the small end of the feeding device (6) and the inner wall of the cylinder (1) is 0.8-0.9 times the diameter of the cylinder (1). The horn-shaped guide vane (6-3) at the small end of the feeding device (6) is the end horn-shaped guide vane. The convex surface of the end horn-shaped guide vane is coaxially connected to an annular support (6-2). The diameter of the annular support (6-2) is smaller than the diameter of the annular support connected to the narrow end of the end horn-shaped guide vane, and larger than the diameter of the narrow end of the end horn-shaped guide vane.

10. A separator suitable for a salt cavern compressed air energy storage power station according to claim 1, characterized in that, The surface of the feeding device (6) and the inner wall of the cylinder (1) are both covered with anti-corrosion layer, and the bottom of the cylinder (1) is provided with a drain port (1-3).

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