An artificial cavern gas storage

Abstract

The utility model provides a kind of artificial chamber gas storage, main pipeline is set to the outside of gas storage body, and the gas inlet of gas storage is provided with sealing plug, gas conveying pipeline includes first pipeline and second pipeline;The first end of first pipeline and second pipeline is communicated with main pipeline, and the first end of first pipeline is provided with first valve, and the first end of second pipeline is provided with second valve, and the second end of first pipeline and second pipeline is communicated with the gas storage cavity of gas storage and respectively arranged in the gas storage cavity both ends, passes through sealing plug.The artificial chamber gas storage is divided into two gas conveying branch pipes by main pipeline after entering gas storage, and valve is set in two gas conveying branch pipes, and high-pressure gas is alternately inputted to gas storage cavity by alternately opening and closing valve in two gas conveying branch pipes, avoid the high temperature phenomenon of chamber far from gas inlet under the gas inlet mode of single filling.

Description

Technical Field

[0001] This utility model belongs to the technical field of artificial chamber gas storage, specifically relating to an artificial chamber gas storage. Background Technology

[0002] The temperature distribution and state within an artificial gas storage chamber play a decisive role in the stress state of the sealing structure and the performance and durability of the sealing layer material. Studies have shown that under existing single-inlet / outlet gas delivery methods, the gas temperature distribution inside the storage chamber exhibits extremely uneven distribution during the gas filling and storage process, with localized high temperatures even occurring in certain areas. For example, in a long tunnel-type gas storage chamber with unidirectional filling, the temperature of the compressed gas at the end furthest from the filling port can reach 300℃-500℃. These localized high temperatures inside the storage chamber can adversely affect the stress state of the sealing structure. Chinese patent CN212319398U, entitled "An Underground Gas Storage Facility," discloses an underground gas storage facility. One end of the gas filling and discharging pipeline of this underground gas storage facility is located outside the main body of the facility, while the other end extends through the main body into the interior of the facility. Multiple inlets and outlets are provided on the gas filling and discharging pipeline. Compressed gas enters different locations inside the underground gas storage facility through these multiple inlets and outlets. This solves the problems of uneven distribution of compressed gas and localized high temperature of compressed gas caused by a single inlet and outlet. However, this solution is more suitable for linear underground gas storage facilities with a cross-sectional dimension D much smaller than the length L, and requires multiple inlets and outlets to be set on a relatively long gas transmission pipeline inside the storage facility, resulting in a complex pipeline structure. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a simple artificial chamber gas storage facility suitable for transporting gas in gas storage chambers of various configurations, with low construction cost, and to solve problems such as uneven temperature distribution, excessively high local temperature, and high cost of temperature control engineering caused by gas compression during gas transport.

[0004] The artificial chamber gas storage tank provided by this utility model includes a main pipeline disposed outside the gas storage tank body, a sealing plug disposed at the air inlet of the gas storage tank, and also includes a first pipeline, a second pipeline, a first valve, and a second valve; the first end of the first pipeline and the first end of the second pipeline are both connected to the main pipeline, the first end of the first pipeline is provided with the first valve, the first end of the second pipeline is provided with the second valve, and the second ends of the first pipeline and the second end of the second pipeline both pass through the sealing plug and are connected to the gas storage cavity of the gas storage tank.

[0005] By splitting the main gas pipeline into two branch pipes, the first and second, after entering the gas storage chamber, valves are installed at the first ends of both pipes. Alternating opening and closing of these valves allows high-pressure gas to be supplied to both ends of the storage chamber via the two branch pipes. Low-temperature, high-pressure gas enters the storage chamber through the first pipe. Due to the continuous influx of low-temperature gas, the temperature at the outlet of the first pipe remains relatively low. However, due to the poor compression and flow of gas within the chamber, the temperature at the outlet of the second pipe gradually rises, resulting in a relatively high temperature. Closing the first valve on the first pipe and opening the second valve on the second pipe allows the low-temperature gas supplied by the second pipe to enter the previously relatively high-temperature storage chamber at the outlet of the second pipe. This mixes with the high-temperature gas there, lowering the temperature of the previously high-temperature gas and eliminating the high-temperature phenomenon that occurs at the chamber end without an inlet in a single-inlet gas supply method. This achieves the goal of preventing localized high temperatures within the gas storage chamber.

[0006] Furthermore, the second ends of the first pipe and the second pipe are respectively located at both ends of the gas storage cavity. When a traditional gas storage tank has a single gas inlet, the highest temperature point in the gas storage tank is generally located at the farthest end of the gas storage cavity, away from the gas inlet. By placing the two gas inlets at the farthest ends of the gas storage cavity, the high temperature phenomenon inside the gas storage tank caused by the compressed gas during intake can be minimized.

[0007] Furthermore, the gas storage tank is an annular chamber, and the sealing plug is located within the annular channel of the annular chamber. The second end of the first pipe and the second end of the second pipe are respectively located on both sides of the sealing plug.

[0008] Furthermore, the gas storage chamber is a linear chamber, the air inlet is located in the middle of the linear chamber, and the second end of the first pipe and the second end of the second pipe are arranged along the length direction of the linear chamber and in opposite directions.

[0009] Furthermore, the gas storage chamber is a linear chamber, the air inlet is located at the end of the linear chamber, and the second end of the first pipe and the second end of the second pipe are respectively located at both ends of the linear chamber.

[0010] The above three different implementation methods adapt to the installation methods of the first and second pipelines for gas storage facilities with different chamber configurations, reducing the difficulty of pipeline laying and construction costs.

[0011] Furthermore, both the first and second pipelines are supported by flexible supports on the sealing layer at the bottom of the tunnel, which can minimize the risk of damage to the sealing layer caused by the installation of the gas transmission branch pipe, and the installation scheme is convenient.

[0012] Furthermore, both the first and second valves are shut-off valves.

[0013] This utility model has the following beneficial effects:

[0014] The artificial chamber gas storage facility provided by this utility model adopts a dual-branch pipe (dual air inlets) alternating air intake method, eliminating the high temperature phenomenon that occurs at the bottom of the chamber on the side without an air inlet when inflating with a single air inlet. The entire pipeline structure is simple and easy to install, avoiding the problems of complex pipeline processing and high installation difficulty caused by an excessive number of air inlets in multi-air inlet pipeline layout schemes. It does not require additional auxiliary facilities to enhance gas flow in the chamber, and can achieve the same cooling effect, significantly reducing the cost and construction difficulty of the gas storage temperature control project. Attached Figure Description

[0015] Figure 1 This is a diagram showing the piping layout of the annular chamber in Example 1.

[0016] Figure 2 This is a horizontal layout diagram of the straight-line chamber piping in Example 2.

[0017] Figure 3 This is a vertical cross-sectional view of the straight-line chamber piping layout in Example 2.

[0018] Figure 4 This is a vertical cross-sectional view of the straight-line chamber piping layout in Example 3.

[0019] Figure 5 This is a cross-sectional view of the straight-line chamber pipe support in Example 3.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1-Gas storage tank; 2-Sealing plug; 3-Main pipeline; 4-Stop valve; 5-Stop valve; 6-First pipeline; 7-Second pipeline; 8-Flexible support. Detailed Implementation

[0022] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate the direction as shown in the drawings and do not limit the structure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. It should also be noted that, in the description of the present invention, unless otherwise explicitly specified and limited, the terms "set," "connect," and "install" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. Example

[0023] like Figure 1 As shown, in this embodiment, the gas storage chamber 1 is an annular chamber, that is, a tunnel-type artificially excavated chamber with an annular layout. The sealing plug 2 is located in the annular channel of the annular chamber. One end of the main pipeline 3 for transporting high-pressure gas is connected to the outlet of the air compressor, and the other end splits into two parallel high-pressure gas transport branches—the first pipeline 6 and the second pipeline 7—before entering the sealing plug 2. The first pipeline 6 is equipped with a first valve 4, and the second pipeline 7 is equipped with a second valve 5. The first valve 4 and the second valve can be shut-off valves. After passing through the sealing plug 2, the first pipeline 6 and the second pipeline 7 are respectively located on both sides of the sealing plug 2. The two sides of the sealing plug 2 are essentially the two ends with the farthest distance between them in the annular chamber's gas storage cavity, so that the outlets of the first pipeline 6 and the second pipeline 7 are located at the two ends of the annular chamber's gas storage cavity, and the gas flow directions at the second end outlets of the first pipeline 6 and the second pipeline 7 are opposite. Alternating switching of the first valve 4 and the second valve 5 causes the first pipeline 6 and the second pipeline 7 to alternately deliver high-pressure gas into the gas storage tank. The time interval between the alternating switching of the first valve 4 and the second valve 5 should be controlled between 0.5h and 2.0h. This allows the low-temperature gas delivered by one of the delivery branches to enter the other end of the gas storage cavity, which was originally at a relatively high temperature, and mix with the high-temperature gas there, thereby lowering the temperature of the gas that was originally at a high temperature.

[0024] The dual-inlet alternating inflation scheme in this embodiment eliminates the high temperature phenomenon at the bottom of the chamber without an inlet under the single-inlet inflation technology. It also reduces the difficulty of pipe processing and installation caused by the excessive number of inflation ports in the multi-inlet pipe layout process. At the same time, it eliminates the need for auxiliary facilities to enhance airflow in the chamber. It can significantly reduce the cost and construction difficulty of temperature control engineering while achieving the same cooling effect.

[0025] In this embodiment, the flexible support for the gas transmission branch pipe inside the tunnel is directly arranged on the sealing layer at the bottom of the tunnel, which can minimize the risk of damage to the sealing layer caused by the installation of the gas transmission branch pipe, and the installation scheme is convenient. Example

[0026] like Figure 2 and Figure 3 As shown, in this embodiment, the gas storage 1 is a tunnel-type gas storage silo with a linear layout. The air inlet, equipped with a sealing plug 2, is located in the middle of the linear chamber. The first ends of the first pipe 6 and the second pipe 7 are connected to the main pipe 3 outside the gas storage silo 1. The first end of the first pipe 6 is equipped with a first valve 4, and the first end of the second pipe 7 is equipped with a second valve 5. The second ends of the first pipe 6 and the second pipe 7 pass through the sealing plug 2 and are arranged in opposite directions along the length of the linear chamber. The gas outlets of the first pipe 6 and the second pipe 7 are located at the left and right ends of the gas storage cavity, respectively. Figure 2 , 3 As shown in Figure 5, both the first pipe 6 and the second pipe 7 are supported by flexible supports 8 at the bottom of the chamber. The flexible supports 8 are made of polymer flexible concrete with an elastic modulus of less than 200 MPa. Figure 3 As shown, the second ends of the first pipe 6 and the second pipe 7 extend upwards from the left and right ends of the gas storage cavity and then extend in the opposite direction to the inlet direction, so that the gas outlets are all facing the middle of the straight chamber, and the gas flow path is that the left and right ends of the initial cavity converge towards the middle. During the filling and discharging process, it is forbidden to open the first valve 4 and the second valve 5 at the same time to prevent local high temperature phenomena in the middle of the gas storage.

[0027] When the first valve 4 is opened and the second valve 5 is closed, low-temperature, high-pressure gas enters the gas storage chamber through the first pipe 6. During this period, the gas temperature at the outlet of the first pipe 6 at the left end of the gas storage chamber remains relatively low due to the continuous influx of low-temperature gas. However, at the outlet of the second pipe 7 at the right end of the gas storage chamber, the temperature gradually rises due to gas compression and poor flowability, resulting in a relatively high temperature. At this point, the first valve 4 is closed and the second valve 5 is opened. The low-temperature gas transported by the second pipe 7 enters the previously relatively high-temperature area at the right end of the gas storage chamber and mixes with it, thereby lowering the temperature of the gas that was previously at a high temperature. Example

[0028] like Figure 4 As shown, the gas storage 1 in this embodiment is a tunnel-type gas storage silo with a linear layout. The air inlet with a sealing plug 2 is located at the end of the linear chamber. The first ends of the first pipe 6 and the second pipe 7 are connected to the main pipe 3 outside the gas storage silo 1. The first end of the first pipe 6 is equipped with a first valve 4, and the first end of the second pipe 7 is equipped with a second valve 5. The second end of the first pipe 6 passes through the sealing plug 2 and is located at one end of the linear chamber near the sealing plug 2. The second end of the second pipe 7 passes through the sealing plug 2 and extends along the length of the linear chamber, located at the other end away from the sealing plug. The air outlet of the second pipe 7 faces the sealing plug 2. The gas outlets of the first pipe 6 and the second pipe 7 are located at opposite ends of the gas storage cavity. Based on the above arrangement of the gas pipelines, the gas storage silo uses alternating switching of the first valve 4 and the second valve 5 during the filling and discharging process to achieve the alternating supply of high-pressure air into the gas storage silo by the first pipe 6 and the second pipe 7. The time interval between the alternating switching of the first valve 4 and the second valve 5 should preferably be controlled within the range of 0.5h to 2.0h. During the filling and releasing process, it is forbidden to open the first valve 4 and the second valve 5 at the same time to prevent local high temperature phenomena in the middle of the gas storage tank.

[0029] The above provides a detailed description of the artificial chamber gas storage facility provided by this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An artificial chamber gas storage facility, comprising a main pipeline (3) disposed outside the main body of the gas storage facility (1), and a sealing plug (2) disposed at the air inlet of the gas storage facility (1), characterized in that, It also includes a first pipe (6), a second pipe (7), a first valve (4), and a second valve (5); the first end of the first pipe (6) and the first end of the second pipe (7) are both connected to the main pipe (3), the first end of the first pipe (6) is provided with the first valve (4), the first end of the second pipe (7) is provided with the second valve (5), the second end of the first pipe (6) and the second end of the second pipe (7) both pass through the sealing plug (2) and are connected to the gas storage cavity of the gas storage tank (1).

2. The artificial chamber gas storage facility according to claim 1, characterized in that, The second end of the first pipe (6) and the second end of the second pipe (7) are respectively located at both ends of the gas storage cavity.

3. The artificial chamber gas storage facility according to claim 1, characterized in that, The gas storage tank (1) is an annular chamber, and the sealing plug (2) is located in the annular channel of the annular chamber. The second end of the first pipe (6) and the second end of the second pipe (7) are respectively located on both sides of the sealing plug (2).

4. The artificial chamber gas storage facility according to claim 1, characterized in that, The gas storage chamber (1) is a linear chamber, and the air inlet is located in the middle of the linear chamber. The second end of the first pipe (6) and the second end of the second pipe (7) are located along the length of the linear chamber and in opposite directions.

5. The artificial chamber gas storage facility according to claim 1, characterized in that, The gas storage tank (1) is a linear chamber, the air inlet is located at the end of the linear chamber, and the second end of the first pipe (6) and the second end of the second pipe (7) are respectively located at both ends of the linear chamber.

6. The artificial chamber gas storage facility according to any one of claims 1-5, characterized in that, Both the first pipe (6) and the second pipe (7) are supported on the sealing layer at the bottom of the tunnel by flexible supports (8).

7. The artificial chamber gas storage facility according to any one of claims 1-5, characterized in that, The first valve (4) and the second valve (5) are shut-off valves.

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