A gas sampling device for salt cavern compressed air energy storage

Abstract

The utility model discloses a kind of gas sampling devices for salt cavern compressed air energy storage, belong to compressed air energy storage equipment technical field, including first main pipeline;Sampling pipeline both ends are communicated with first main pipeline;Sampling pipeline is equipped with first pressure measurement component, first valve, primary separation component, secondary separation component and second valve in proper order;Flow measurement component and pressure release port are located between first valve and second valve, and third valve is equipped between pressure release port and sampling pipeline;Baffle is located in first main pipeline and sampling pipeline front end, and fixed in the communication place rear side of first main pipeline and sampling pipeline;The utility model utilizes primary separation component and secondary separation component, can effectively separate out solid and liquid in salt cavern air;Utilize flow measurement component can measure the gas flow in sampling pipeline, and then can accurately measure solid and liquid content in salt cavern air, and accurately assess salt cavern air characteristics, ensure that the selection of air pretreatment equipment is accurate.

Description

Technical Field

[0001] The present utility model relates to the technical field of compressed air energy storage equipment, and in particular to a gas sampling device for salt cavern compressed air energy storage. Background Art

[0002] Salt cavern compressed air energy storage is a large-scale physical energy storage technology that uses underground salt caverns to store compressed air and releases it for power generation when needed. Its basic principle is compressing air and storing it in salt caverns during off-peak electricity hours, converting electric energy into pressure potential energy; releasing high-pressure air for power generation during peak electricity hours. Salt cavern compressed air energy storage, just like a huge "air power bank", is of great importance for power grid regulation and promotion of new energy accommodation. The key advantage of salt cavern compressed air energy storage lies in the unique characteristics of salt caverns as natural storage spaces: moderate depth (800-1000 meters underground), good sealing performance, strong pressure bearing capacity (up to 10-15 MPa), and self-repairing function. The conversion efficiency of salt cavern compressed air energy storage is about 70%, and the energy loss is relatively small.

[0003] High-pressure salt cavern air discharged from the salt cavern outlet usually carries solid salt particles and brine. At the present stage, there is no suitable method for sampling and determining the content of solid salt particles and brine. The absence of accurate content data will lead to incorrect model selection of air pretreatment equipment matched with salt cavern air, further cause serious corrosion of subsequent equipment by the salt cavern air, and affect the service life and normal operation.

[0004] Therefore, developing and designing a gas sampling device that can accurately measure the solid content, liquid content and gas flow in salt cavern air and accurately evaluate the characteristics of salt cavern air is an urgent problem to be solved at the present stage. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present utility model provides a gas sampling device for salt cavern compressed air energy storage. By means of a primary separation assembly and a secondary separation assembly on a sampling pipeline, solids and liquids in the salt cavern air can be effectively separated; a flow measurement assembly can measure the gas flow in the sampling pipeline, so that the solid content and liquid content in the salt cavern air can be accurately measured, the characteristics of the salt cavern air can be accurately evaluated, the correct model selection of air pretreatment equipment is ensured, and the service life is prolonged.

[0006] To achieve the above objective, the technical solution adopted by the present utility model is as follows: The present utility model provides a gas sampling device for salt cavern compressed air energy storage, comprising: a first main pipeline; A sampling pipe, both ends of which are connected to the first main pipe; along the flow direction of the air in the salt cavern, the sampling pipe is sequentially equipped with a first pressure measuring component, a first valve, a primary separation component, a secondary separation component, and a second valve; the primary separation component and the secondary separation component are capable of separating solids and liquids in the air in the salt cavern; A flow measurement component is disposed on the sampling pipe and located between the first valve and the second valve; A pressure relief port is provided, which is connected to the sampling pipeline and located between the first valve and the second valve; a third valve is provided between the pressure relief port and the sampling pipeline. A baffle plate is located inside the first main pipe; along the airflow direction of the salt cavern, the baffle plate is located at the front end of the sampling pipe and fixed to the rear side of the connection between the first main pipe and the sampling pipe.

[0007] As a preferred technical solution, a second pressure measuring component is also included, which is disposed on the sampling pipeline and located between the first valve and the second valve.

[0008] As a preferred technical solution, both the first pressure measuring component and the second pressure measuring component are configured as pressure gauges or air pressure sensors.

[0009] As a preferred technical solution, the first valve, the second valve and the third valve are all configured as manual valves.

[0010] As a preferred technical solution, the number of both the first valve and the second valve is set to two.

[0011] As a preferred technical solution, the primary separation component is configured as a centrifugal tube bundle separator, a cyclone separator, or a hydrocyclone separator; Alternatively, the primary separation component may be a combined separator, which includes a solid separator and a liquid separator connected in sequence.

[0012] As a preferred technical solution, the secondary separation component is configured as a wire mesh separator, a blade separator, a coalescing separator, or a dry gas filter element separator.

[0013] As a preferred technical solution, the flow measurement component is configured as a differential pressure flow meter, a vortex flow meter, a mass flow meter, or an ultrasonic flow meter; And / or, the flow measurement component is located between the secondary separation component and the second valve.

[0014] As a preferred technical solution, the pressure relief port is located between the secondary separation component and the second valve.

[0015] As a preferred technical solution, a second main pipeline is also included, which is set up independently in parallel with the first main pipeline.

[0016] The beneficial effects of this utility model are as follows: 1. This utility model utilizes a primary separation component and a secondary separation component on the sampling pipeline to effectively separate solids and liquids in the air of the salt cavern; the flow measurement component can measure the gas flow rate in the sampling pipeline, thereby accurately measuring the solid and liquid content in the air of the salt cavern and accurately assessing the characteristics of the air in the salt cavern, ensuring accurate selection of air pretreatment equipment and improving its service life.

[0017] 2. The primary separation component of this utility model is a combined separator, which, when used in conjunction with the secondary separation component, can separate more than 99.9% of solids and liquids, and has low resistance loss.

[0018] 3. This utility model utilizes a baffle plate located at the rear of the connection between the first main pipe and the sampling pipe to generate negative pressure at the inlet of the sampling pipe, promoting the flow of salt cavern air in the first main pipe into the sampling pipe. While the characteristics of the salt cavern air are being evaluated using the sampling pipe, the first main pipe can still simultaneously discharge the salt cavern air. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the gas sampling device for compressed air energy storage in a salt cavern according to the present invention. Figure 2 This is a schematic diagram of the structure at the connection point between the first main pipeline and the sampling pipeline. Figure 3 for Figure 2 A sectional view.

[0020] In the diagram: 1-First main pipeline, 2-Sampling pipeline, 21-First pressure measurement component, 22-First valve, 23-First-stage separation component, 24-Second-stage separation component, 25-Second valve, 3-Flow measurement component, 4-Pressure relief port, 41-Third valve, 5-Second pressure measurement component, 6-Second main pipeline, 7-Baffle plate. Detailed Implementation

[0021] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0022] Please refer to Figures 1-3This invention provides a first embodiment of a gas sampling device for compressed air energy storage in a salt cavern, comprising a first main pipe 1 and a sampling pipe 2. The first main pipe 1 is used to discharge salt cavern air from the salt cavern outlet. Both ends of the sampling pipe 2 are connected to the first main pipe 1. During sampling, the salt cavern air in the first main pipe 1 flows through the sampling pipe 2. Along the flow direction of the salt cavern air in the sampling pipe 2, the sampling pipe 2 is sequentially provided with a first pressure measuring component 21, a first valve 22, a primary separation component 23, a secondary separation component 24, and a second valve 25. The first pressure measuring component 21 is used to measure the air pressure in the sampling pipe 2. When the first valve 22 and the second valve 25 are opened simultaneously, the sampling pipe 2 is in a through state; when the first valve 22 and the second valve 25 are closed simultaneously, the sampling pipe 2 is in a blocked state. The primary separation component 23 and the secondary separation component 24 work together to completely separate the solids and liquids in the salt cavern air in the sampling pipe 2. The sampling pipe 2 is also equipped with a flow measurement component 3 and a pressure relief port 4. The flow measurement component 3 is located on the sampling pipe 2 and between the first valve 22 and the second valve 25, and is used to measure the flow rate of the salt cavern air in the sampling pipe 2. The pressure relief port 4 is connected to the sampling pipe 2 and is located between the first valve 22 and the second valve 25. A third valve 41 is provided between the pressure relief port 4 and the sampling pipe 2. When the sampling pipe 2 is in a blocked state, opening the third valve 41 can discharge the salt cavern air remaining in the sampling pipe 2 between the first valve 22 and the second valve 25. A baffle plate 7 is installed inside the first main pipe 1. Along the flow direction of the salt cavern air, the baffle plate 7 is located at the front end of the sampling pipe 2 and fixed to the rear side of the connection between the first main pipe 1 and the sampling pipe 2. The baffle plate 7 can promote the flow of salt cavern air in the first main pipe 1 into the sampling pipe 2. Specifically, the shape of the baffle plate 7 can be a semi-cylindrical shell that matches the shape of the sampling pipe 2, which facilitates production and assembly while providing a good blocking effect on the salt cavern air.

[0023] Specifically, the first valve 22, the second valve 25, and the third valve 41 are all manual valves, which are controlled by manual means; in other embodiments, the first valve 22, the second valve 25, and the third valve 41 can also be solenoid valves.

[0024] To ensure the stability of controlling the on / off state of sampling pipe 2, please refer to... Figure 1 The number of the first valve 22 and the second valve 25 is preferably set to two.

[0025] Furthermore, the primary separation component 23 is used to separate solids from the air in the salt cavern. Specifically, it can be configured as a centrifugal tube bundle separator, a cyclone separator, or a hydrocyclone separator. In other embodiments, during actual operation, some liquid will also be separated when the primary separator separates solids. The primary separation component 23 can be configured as a combined separator, which includes a solid separator and a liquid separator connected in sequence. The solid separator can be a centrifugal tube bundle separator, and the liquid separator can be a wire mesh separator. The combined separator improves the separation effect of solids and liquids while having low resistance loss.

[0026] Furthermore, the secondary separation component 24 is used to separate liquid from the air in the salt cavern, and can be specifically configured as a wire mesh separator, a blade separator, a coalescing separator, or a dry air filter separator.

[0027] Accordingly, please refer to Figure 1 The flow measurement component 3 is located between the secondary separation component 24 and the second valve 25. After the salt cavern air reaches a steady state through the primary separation component 23 and the secondary separation component 24, it passes through the flow measurement component 3 to ensure the accuracy of the flow measurement. Specifically, the flow measurement component 3 can be a differential pressure flow meter, a vortex flow meter, a mass flow meter, or an ultrasonic flow meter.

[0028] In this embodiment, please refer to Figure 1 The pressure relief port 4 is located between the secondary separation component 24 and the second valve 25. When the sampling pipeline 2 is in a blocked state and the third valve 41 is opened, the salt cavern air remaining in the sampling pipeline 2 between the first valve 22 and the second valve 25 can be discharged.

[0029] Further, please refer to Figure 1 The present invention shall also include a second pressure measuring component 5, which is disposed on the sampling pipe 2 and located between the first valve 22 and the second valve 25. When the sampling pipe 2 is in a blocked state, and the third valve 41 is opened to discharge the salt cavern air remaining in the sampling pipe 2 between the first valve 22 and the second valve 25, the second pressure measuring component 5 measures the pressure in the sampling pipe 2 to detect whether the pressure can be released to normal pressure.

[0030] Specifically, both the first pressure measuring component 21 and the second pressure measuring component 5 are pressure gauges; in other embodiments, the first pressure measuring component 21 and the second pressure measuring component 5 may also be air pressure sensors, so as to accurately measure air pressure.

[0031] In this embodiment, please refer to Figure 1 The present invention should also include a second main pipe 6, which is set in parallel and independently with the first main pipe 1, so that the air in the salt cavern can be discharged through the first main pipe 1 and the second main pipe 6 at the same time.

[0032] Please refer to Figures 1-3 The specific usage process of this utility model is as follows: Simultaneously, the first valve 22 and the second valve 25 are opened, allowing the salt cavern air in the first main pipe 1 to flow through the sampling pipe 2. The primary separation component 23 separates the solids in the salt cavern air (when the primary separation component 23 is a combined separator, it can also separate some liquids while separating the solids in the salt cavern air). The secondary separation component 24 separates the liquids in the salt cavern air. The flow measurement component 3 continuously measures the flow rate Q of the flowing salt cavern air. g After running for a period of time t (e.g., one hour), close the first valve 22 and the second valve 25, open the third valve 41, and release pressure through the pressure relief port 4. Monitor whether the sampling pipeline 2 has been depressurized to normal pressure through the second pressure measuring component 5. The solid content m collected by the primary separation component 23 was obtained. s The liquid content V collected by the secondary separation component 24 L ; The solid content in the sampling pipeline is: C s =m s / (Q) g *t); the liquid content in the sampling pipeline is: C l =(V L *ρ l ) / (Q g *t), where ρ l The density of the liquid.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas sampling device for compressed air energy storage in salt caverns, characterized in that, include: First main pipeline (1); The sampling pipe (2) is connected to the first main pipe (1) at both ends. Along the flow direction of the air in the salt cavern, the sampling pipe (2) is provided with a first pressure measuring component (21), a first valve (22), a primary separation component (23), a secondary separation component (24), and a second valve (25) in sequence. The primary separation component (23) and the secondary separation component (24) can separate solids and liquids in the air in the salt cavern. A flow measurement component (3) is disposed on the sampling pipe (2) and located between the first valve (22) and the second valve (25); Pressure relief port (4), the pressure relief port (4) is connected to the sampling pipe (2) and located between the first valve (22) and the second valve (25), and a third valve (41) is provided between the pressure relief port (4) and the sampling pipe (2). Baffle (7) is located inside the first main pipe (1); along the air flow direction of the salt cavern, the baffle (7) is located at the front end of the sampling pipe (2) and fixed to the rear side of the connection between the first main pipe (1) and the sampling pipe (2).

2. The gas sampling device for salt cavern compressed air energy storage according to claim 1, characterized in that, It also includes a second pressure measuring component (5), which is disposed on the sampling pipe (2) and located between the first valve (22) and the second valve (25).

3. A gas sampling device for compressed air energy storage in salt caverns according to claim 2, characterized in that, Both the first pressure measuring component (21) and the second pressure measuring component (5) are configured as pressure gauges or air pressure sensors.

4. A gas sampling device for compressed air energy storage in salt caverns according to claim 1, characterized in that, The first valve (22), the second valve (25) and the third valve (41) are all manual valves.

5. A gas sampling device for salt cavern compressed air energy storage according to claim 1 or 4, characterized in that, The number of the first valve (22) and the second valve (25) is set to two.

6. A gas sampling device for compressed air energy storage in salt caverns according to claim 1, characterized in that, The primary separation component (23) is configured as a centrifugal tube bundle separator, a cyclone separator, or a hydrocyclone separator; Alternatively, the primary separation component (23) may be a combined separator comprising a solid separator and a liquid separator connected in sequence.

7. A gas sampling device for salt cavern compressed air energy storage according to claim 1 or 6, characterized in that, The secondary separation component (24) is configured as a wire mesh separator, a blade separator, a coalescing separator, or a dry gas filter element separator.

8. A gas sampling device for compressed air energy storage in salt caverns according to claim 1, characterized in that, The flow measurement component (3) is configured as a differential pressure flow meter, a vortex flow meter, a mass flow meter, or an ultrasonic flow meter; And / or, the flow measurement component (3) is located between the secondary separation component (24) and the second valve (25).

9. A gas sampling device for compressed air energy storage in salt caverns according to claim 1, characterized in that, The pressure relief port (4) is located between the secondary separation component (24) and the second valve (25).

10. A gas sampling device for compressed air energy storage in salt caverns according to claim 1, characterized in that, It also includes a second main pipeline (6), which is set up independently in parallel with the first main pipeline (1).

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