CN115962011A - Sealing structure for compressed air energy storage cavity and monitoring method - Google Patents
Sealing structure for compressed air energy storage cavity and monitoring method Download PDFInfo
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- CN115962011A CN115962011A CN202310012280.7A CN202310012280A CN115962011A CN 115962011 A CN115962011 A CN 115962011A CN 202310012280 A CN202310012280 A CN 202310012280A CN 115962011 A CN115962011 A CN 115962011A
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Abstract
The invention discloses a sealing structure and a monitoring method for a compressed air energy storage cavity, wherein the structure comprises a waterproof layer, a composite material lining layer and a sealing layer, the sealing layer comprises an outer protective layer, an elastic buffer cushion layer and a structural working layer, a cavity is arranged in the structural working layer, a pressure sensor is embedded in the outer protective layer, and the pressure sensor is attached to the outer side wall of the composite material lining layer; a plurality of optical fiber temperature and humidity sensors are arranged on the contact surface of the structure working layer and the compressed air; the method comprises the following steps: 1. constructing a sealing structure on the surrounding rock mass; 2. detecting a sealing structure on the surrounding rock mass; 3. and injecting and monitoring compressed air in the cavity. According to the invention, the compressed air energy storage cavity is provided with the waterproof layer, the composite material lining layer and the sealing layer, and the detection sensor is arranged to monitor the change condition of the internal environment of the cavity in real time, so that the safety of the cavity sealing structure in the compressed air storage process is ensured.
Description
Technical Field
The invention belongs to the technical field of new energy storage, and particularly relates to a sealing structure for a compressed air energy storage cavity and a monitoring method.
Background
At present, compressed air energy storage is mainly applied to underground salt cavern gas storage and underground rock cavern gas storage, and the underground rock cavern gas storage is widely used due to the advantages of convenient site selection, few limiting factors, mature construction technology, strong operability and the like. At present, the traditional compressed air energy storage cavity sealing structure mostly adopts lining, rubber, glass fiber reinforced plastic and the like for sealing, and because the gas pressure in the processes of gas injection and gas storage in the cavity is changed continuously and circularly, the stress changes of the sealing layer, the lining of the cavern and the surrounding rock are not necessarily the same, so the durability and the long-term stability of the sealing layer can be greatly reduced under the action of gas injection and gas storage, and meanwhile, the safety of the gas storage is also influenced to a certain extent. Therefore, the existing gas storage surrounding rock cavity sealing structure needs to be improved, meanwhile, a detection sensor needs to be added, the change condition of the internal environment of the cavity is monitored in real time, corresponding measures are conveniently and timely taken according to the change of the internal environment of the cavity in the follow-up process, and the safety of the cavity sealing structure in the storage process of compressed air is ensured.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a sealing structure for a compressed air energy storage cavity, which is simple in structure and reasonable in design, wherein a waterproof layer, a composite material lining layer and a sealing layer are arranged on the compressed air energy storage cavity, and a detection sensor is arranged to monitor the change condition of the internal environment of the cavity in real time, so that corresponding measures can be taken in time according to the change of the internal environment of the cavity in the follow-up process, and the safety of the cavity sealing structure in the process of storing compressed air is ensured.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a be used for compressed air energy storage cavity seal structure which characterized in that: the sealing layer comprises an outer protection layer, an elastic cushion pad layer and a structural working layer which are sequentially arranged from inside to outside, wherein the outer protection layer is arranged on the composite material lining layer, and a cavity is arranged in the structural working layer;
a pressure sensor is embedded in the outer protective layer and is attached to the outer side wall of the composite lining layer;
and a plurality of optical fiber temperature and humidity sensors are arranged on the contact surface of the structure working layer and the compressed air in the cavity.
The sealing structure for the compressed air energy storage cavity is characterized in that: the waterproof layer is a plain concrete waterproof layer or a cement waterproof layer, and the thickness of the waterproof layer is 2 mm-3 mm.
The sealing structure for the compressed air energy storage cavity is characterized in that: the composite lining layer is a reinforced steel fiber concrete layer, and the thickness of the composite lining layer is 5 cm-10 cm.
The sealing structure for the compressed air energy storage cavity is characterized in that: the outer protective layer and the structural working layer are both epoxy glass fiber reinforced plastic coatings, the thickness of the outer protective layer is 10-12 mm, and the thickness of the structural working layer is 15-16 mm;
the elastic cushion layer is a butyl rubber cushion layer, and the thickness of the elastic cushion layer is 3-4 mm.
The sealing structure for the compressed air energy storage cavity is characterized in that: the inner side wall of the elastic cushion layer is arranged on the outer protection layer through a first adhesive layer, and the outer side wall of the elastic cushion layer is connected with the structural working layer in a sealing mode through a second adhesive layer.
The sealing structure for the compressed air energy storage cavity is characterized in that: and a plurality of prestressed connecting pieces are arranged in the composite material lining layer, the waterproof layer and the surrounding rock mass.
The sealing structure for the compressed air energy storage cavity is characterized in that: the prestressed connecting piece is arranged perpendicular to the inner side wall of the surrounding rock body, one end of the prestressed connecting piece extends into the surrounding rock body for 1-3 m, and the other end of the prestressed connecting piece is flush with the joint of the composite lining layer and the outer protective layer.
Meanwhile, the invention also discloses a monitoring method for the sealing structure of the compressed air energy storage cavity, which has simple steps and reasonable design, and is characterized by comprising the following steps:
step one, construction of a sealing structure on a surrounding rock body:
step 101, constructing a waterproof layer on a surrounding rock mass;
102, driving a prestressed connecting piece into the waterproof layer; the prestressed connecting piece is arranged to be vertical to the inner side wall of the surrounding rock mass, and one end of the prestressed connecting piece extends into the surrounding rock mass for 1-3 m;
103, constructing a lining layer of a composite material on the waterproof layer;
104, mounting a plurality of pressure sensors on the composite lining layer, and coating an outer protective layer; the other end of the prestress connecting piece is flush with the joint of the composite lining layer and the outer protective layer, and the pressure sensor is embedded in the outer protective layer;
105, laying an elastic cushion layer on the outer protection layer through an adhesive;
106, coating an adhesive on the elastic cushion layer and coating a structural working layer;
step two, detecting a sealing structure on the surrounding rock mass:
step 201, injecting compressed air into the cavity until the volume of the compressed air in the cavity is
The pressure sensor detects the pressure in the cavity to obtain an initial pressure value P 0 (ii) a Wherein V represents the volume of the cavity;
step 202, after the cavity is static for 24-48 hours, the pressure detected by the pressure sensor is more than 0.8P 0 The leakage rate of the cavity is qualified; otherwise, the leakage rate of the cavity is unqualified, and step 203 is executed;
step 203, performing leakage repairing on the sealing layer, and then repeating the step 201 and the step 202 and performing gas injection detection until the leakage rate of the cavity is qualified;
step three, injecting and monitoring compressed air in the cavity:
step 301, when the leakage rate of the cavity is qualified, continuing to inject compressed air into the cavity, and detecting the pressure in the cavity in real time by the pressure sensor and detecting the temperature and humidity in the cavity in real time by the optical fiber temperature and humidity sensor in the process of injecting the compressed air into the cavity;
step 302, recording the pressure value detected at the ith detection time as P i The temperature value detected at the ith detection moment is recorded as T i The humidity value detected at the ith detection time is denoted as RH i And is combined with P i 、T i And RH i Respectively set to the maximum value P s Temperature set maximum value T s And humidity set maximum value RH s Making a comparison when P i Less than P s ，T i Less than T s ，RH i Less than RH s When the cavity is full, compressed air is continuously injected into the cavity until the cavity is full, and the injection is stopped; otherwise, stopping injecting the compressed air;
step 303, detecting the pressure in the cavity by the pressure sensor when the injection of the compressed air is stopped to obtain a pressure value P 1 ；
Then, the pressure sensor detects the pressure in the cavity in real time, and the detected pressure is greater than 0.8P 1 The compressed air energy storage of the cavity meets the requirement; otherwise, go to step 304;
and step 304, performing leak repairing on the sealing layer, and then repeating the second step and the third step.
Compared with the prior art, the invention has the following advantages:
1. the invention has simple structure and reasonable design, and improves the long-term stability and durability of the seal of the compressed air energy storage cavity under the conditions of gas injection and gas storage.
2. The waterproof layer is arranged on the inner wall of the surrounding rock body and is mainly used for moisture insulation, water prevention and moisture prevention.
3. The composite lining layer is arranged to mainly solve the transition effect of the internal form of the surrounding rock body structure and the surrounding rock body structure, finally the tensile stress and the anti-cracking strength of the lining layer are increased through the composite lining layer, and meanwhile, the influence of the change of the surrounding rock pressure on the lining layer can be reduced.
4. The elastic buffer cushion layer is arranged to reduce the damage and deformation of the composite material lining layer and the surrounding rock mass caused by the heat conduction effect of the structural working layer and the conduction of the cavity pressure through the structural working layer, and the long-term stability and the durability of the cavity sealing layer are improved; the deformation influence of the stress change of the composite material lining layer and the surrounding rock mass on the sealing layer is reduced; and the leakage rate can be reduced, so that the safety of compressed air energy storage is guaranteed.
5. The invention is provided with the pressure sensor and the optical fiber temperature and humidity sensor, realizes real-time monitoring of the change condition of the internal environment of the cavity, is convenient for timely taking corresponding measures according to the change of the internal environment of the cavity in the follow-up process, and ensures that the sealing structure is qualified.
6. The monitoring method for the compressed air energy storage cavity sealing structure has the advantages of simple steps, convenience in realization and simplicity and convenience in operation, and ensures the safety of the cavity sealing structure in the compressed air storage process.
7. The monitoring method for the sealing structure of the compressed air energy storage cavity is simple and convenient to operate and good in using effect, firstly, the sealing structure on the surrounding rock mass is constructed, and secondly, the sealing structure on the surrounding rock mass is detected; and finally injecting and monitoring compressed air in the cavity.
In conclusion, the compressed air energy storage cavity is simple in structure and reasonable in design, the waterproof layer, the composite material lining layer and the sealing layer are arranged on the compressed air energy storage cavity, the detection sensor is arranged to monitor the change condition of the internal environment of the cavity in real time, corresponding measures can be taken timely according to the change of the internal environment of the cavity, and the safety of the cavity sealing structure in the compressed air storage process is guaranteed.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a block flow diagram of the present invention.
Description of reference numerals:
1-surrounding rock mass; 2-a sealing layer;
5, a waterproof layer; 6-lining layer of composite material;
7-outer protective layer; 8-elastic cushion layer; 9-structural work layer;
10-a prestressed connecting piece; 11-optical fiber temperature and humidity sensor; 12-a pressure sensor;
13-chamber.
Detailed Description
As shown in fig. 1, the sealing structure for the compressed air energy storage cavity comprises a waterproof layer 5, a composite material lining layer 6 and a sealing layer 2 which are arranged on a surrounding rock body 1 and sequentially distributed from inside to outside, wherein the sealing layer 2 comprises an outer protective layer 7, an elastic cushion layer 8 and a structural working layer 9 which are sequentially distributed from inside to outside, the outer protective layer 7 is arranged on the composite material lining layer 6, and a cavity 13 is arranged in the structural working layer 9;
a pressure sensor 12 is embedded in the outer protection layer 7, and the pressure sensor 12 is attached to the outer side wall of the composite material lining layer 6;
and a plurality of optical fiber temperature and humidity sensors 11 are arranged on the contact surface of the structure working layer 9 and the compressed air in the cavity 13.
In this embodiment, the waterproof layer 5 is a plain concrete waterproof layer or a cement waterproof layer, and the thickness of the waterproof layer 5 is 2mm to 3mm.
In this embodiment, the lining layer 6 made of the composite material is a steel reinforced fiber concrete layer, and the thickness of the lining layer 6 made of the composite material is 5 cm-10 cm.
In the embodiment, the outer protection layer 7 and the structural working layer 9 are epoxy glass fiber reinforced plastic coatings, the thickness of the outer protection layer 7 is 10 mm-12 mm, and the thickness of the structural working layer 9 is 15 mm-16 mm;
the elastic cushion layer 8 is a butyl rubber cushion layer, and the thickness of the elastic cushion layer 8 is 3 mm-4 mm.
In this embodiment, the inside wall of the elastic cushion layer 8 is disposed on the outer protection layer 7 through a first adhesive layer, and the outside wall of the elastic cushion layer 8 is connected with the structural working layer 9 through a second adhesive layer in a sealing manner.
In this embodiment, a plurality of prestressed connecting pieces 10 are arranged in the composite material lining layer 6, the waterproof layer 5 and the rock mass 1.
In this embodiment, the prestressed connecting piece 10 is arranged perpendicular to the inner side wall of the surrounding rock body 1, one end of the prestressed connecting piece 10 extends into the surrounding rock body 1 by a length of 1m to 3m, and the other end of the prestressed connecting piece 10 is flush with the joint of the composite lining layer 6 and the outer protective layer 7.
In this embodiment, in actual use, the surrounding rock body 1 is provided with a gas injection channel and a gas discharge channel which are communicated with the cavity 13.
In this embodiment, the waterproof layer 5 is mainly used for moisture insulation, water proofing, and moisture proofing on the inner wall of the surrounding rock mass 1.
In this embodiment, the composite lining layer 6 mainly solves the transition effect of the internal form of the structure of the surrounding rock mass 1 and the structure of the surrounding rock mass 1, and finally the tie stress and the anti-cracking strength of the lining layer are increased through the composite lining layer 6, and meanwhile, the influence of the change of the surrounding rock pressure on the lining layer can be reduced.
In this embodiment, in actual use, the prestressed connecting member 10 is a steel nail.
In this embodiment, the prestressed connecting piece 10 is arranged to increase the connection between the composite lining layer 6 and the surrounding rock body 1, so as to achieve the super-strong fixing effect.
In this embodiment, both the first adhesive layer and the second adhesive layer are high-strength adhesives.
In this embodiment, it is further preferable that both the first adhesive layer and the second adhesive layer are reinforced epoxy adhesives.
In this embodiment, in order to reduce the influence of the gas pressure, temperature, and humidity of the cavity 13 on the outer protection layer 7, a high-strength adhesive is used on the outer protection layer 7 to uniformly and densely adhere the elastic cushion layer 8.
In this embodiment, in order to improve the sealing performance of the compressed air energy storage cavity, the structural working layer 9 is applied on the elastic cushion layer 8, and the high-strength adhesive is also used for bonding, so as to reduce the temperature conduction in the cavity 13 and reduce the destructive effect of the gas pressure of the cavity on the sealing layer 2, the lining and the surrounding rock.
In this embodiment, the elastic cushion layer 8 is arranged between the outer protection layer 7 and the structural working layer 9, so as to reduce the thermal conduction effect of the structural working layer 9 and the damage and deformation of the composite material lining layer 6 and the rock surrounding body 1 caused by the conduction of the cavity pressure through the structural working layer 9, and increase the long-term stability and durability of the cavity sealing layer; in addition, the elastic cushion layer 8 is also arranged to reduce the deformation influence of the stress change of the composite material lining layer 6 and the rock mass 1 on the sealing layer 2; secondly can be so that reaching the sealed effect that outer protective layer 7 and structure working layer 9 can be better through setting up elastic cushion 8, also can reduce the emergence of leakage rate and bad incident to the security of compressed air energy storage has been ensured.
In the embodiment, the sealing layer 2 is composed of the outer protection layer 7, the elastic buffer cushion layer 8 and the structural working layer 9, so that the sealing performance of the cavity is greatly improved, the leakage rate of gas in the cavity is reduced, and the safety performance of compressed air energy storage is improved; because the elastic buffer cushion layer 8 is added between the outer protective layer 7 and the structural working layer 9, the conduction of the temperature, the humidity, the pressure and the deformation of the surrounding rock body in the cavity is effectively blocked.
In the embodiment, compared with the traditional lining of the cavity of the underground rock cavern gas storage, the lining is made of the composite material, so that the influence of stress change of surrounding rock on the lining structure can be avoided, the anti-cracking performance of the lining layer in the using process can be reduced, and the integrity of the lining structure is ensured.
In this embodiment, in order to improve the stability of the compressed air energy storage cavity and detect the influence of the gas pressure of the cavity on the sealing structure, a pressure sensor 12 is additionally arranged in the outer protection layer 7, and the detection is mainly performed on the cavity pressure. And also serves to prevent leakage of the sealing layer.
In this embodiment, the optical fiber temperature and humidity sensor 11 is arranged to detect the temperature and humidity of the cavity 13, so as to prevent the temperature in the cavity 1 from exceeding a set value, or prevent the humidity from exceeding the set value, and may also facilitate air drying treatment measures for the internal environment of the cavity 13 according to the detected humidity, or facilitate cooling treatment measures for the internal environment of the cavity 13 according to the detected temperature, so as to improve the influence of the internal environment of the cavity 13 on the durability of the sealing layer.
A monitoring method for a compressed air energy storage cavity sealing structure as shown in fig. 2 comprises the following steps:
step one, construction of a sealing structure on a surrounding rock mass:
101, constructing a waterproof layer 5 on the surrounding rock body 1;
102, driving a prestressed connecting piece 10 into the waterproof layer 5; the prestressed connecting piece 10 is arranged perpendicular to the inner side wall of the surrounding rock body 1, and one end of the prestressed connecting piece 10 extends into the surrounding rock body 1 by 1-3 m;
103, constructing a lining layer 6 made of a composite material on the waterproof layer 5;
104, mounting a plurality of pressure sensors 12 on the composite material lining layer 6, and coating an outer protection layer 7; the other end of the prestress connecting piece 10 is flush with the joint of the composite lining layer 6 and the outer protective layer 7, and the pressure sensor 12 is embedded in the outer protective layer 7;
105, laying an elastic cushion layer 8 on the outer protection layer 7 through an adhesive;
step 106, coating an adhesive on the elastic cushion layer 8 and coating the structural working layer 9;
step two, detecting a sealing structure on the surrounding rock mass:
step 201, injecting compressed air into the cavity 13 until the volume of the compressed air in the cavity 13 is equal to
The pressure sensor 12 detects the pressure in the cavity 13 to obtain an initial pressure value P 0 (ii) a Wherein V represents the volume of the cavity 13;
step 202, after the cavity 13 is static for 24-48 hours, the pressure detected by the pressure sensor 12 is greater than 0.8P 0 The leakage rate of the cavity 13 is qualified; otherwise, the leakage rate of the cavity 13 is unqualified, and step 203 is executed;
step 203, performing leakage repairing on the sealing layer 2, and then repeating the step 201 and the step 202 and performing gas injection detection until the leakage rate of the cavity 13 is qualified;
step three, injecting and monitoring compressed air in the cavity:
step 301, when the leakage rate of the cavity 13 is qualified, continuing to inject compressed air into the cavity 13, and in the process of injecting compressed air into the cavity 13, detecting the pressure in the cavity 13 in real time by the pressure sensor 12, and simultaneously detecting the temperature and humidity in the cavity 13 in real time by the optical fiber temperature and humidity sensor 11;
step 302,The pressure value detected at the ith detection moment is recorded as P i The temperature value detected at the ith detection moment is recorded as T i And recording the humidity value detected at the ith detection time as RH i And is combined with P i 、T i And RH i Respectively set to the maximum value P s Temperature set maximum value T s And humidity set maximum value RH s Making a comparison when P i Less than P s ，T i Less than T s ，RH i Less than RH s When the cavity 13 is filled with compressed air, the injection is stopped; otherwise, stopping injecting the compressed air;
step 303, detecting the pressure in the cavity 13 by the pressure sensor 12 when the injection of the compressed air is stopped, and obtaining a pressure value P 1 ；
Then, the pressure sensor 12 detects the pressure in the cavity 13 in real time, and the detected pressure is greater than 0.8P 1 The compressed air energy storage of the cavity 13 meets the requirement; otherwise, go to step 304;
and step 304, performing leakage repairing on the sealing layer 2, and then repeating the step two and the step three.
In this embodiment, the maximum pressure setting value P is set during actual use s Temperature set maximum value T s And humidity set maximum value RH s Can be set according to design requirements.
In the present embodiment, it is further preferable that the maximum pressure setting value P is set s A maximum value T of 10MPa and temperature s Set maximum RH at 80 deg.C s 90% RH.
In conclusion, the compressed air energy storage cavity is simple in structure and reasonable in design, the waterproof layer, the composite material lining layer and the sealing layer are arranged on the compressed air energy storage cavity, the detection sensor is arranged to monitor the change condition of the internal environment of the cavity in real time, corresponding measures can be taken timely according to the change of the internal environment of the cavity, and the safety of the cavity sealing structure in the compressed air storage process is guaranteed.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides a be used for compressed air energy storage cavity seal structure which characterized in that: the composite material lining layer comprises a waterproof layer (5), a composite material lining layer (6) and a sealing layer (2) which are arranged on a surrounding rock body (1) and sequentially distributed from inside to outside, wherein the sealing layer (2) comprises an outer protective layer (7), an elastic buffer cushion layer (8) and a structural working layer (9) which are sequentially distributed from inside to outside, the outer protective layer (7) is arranged on the composite material lining layer (6), and a cavity (13) is arranged in the structural working layer (9);
a pressure sensor (12) is embedded in the outer protection layer (7), and the pressure sensor (12) is attached to the outer side wall of the composite lining layer (6);
and a plurality of optical fiber temperature and humidity sensors (11) are arranged on the contact surface of the structure working layer (9) and the compressed air in the cavity (13).
2. A seal construction for a compressed air energy storage chamber according to claim 1, wherein: the waterproof layer (5) is a plain concrete waterproof layer or a cement waterproof layer, and the thickness of the waterproof layer (5) is 2-3 mm.
3. A seal arrangement for a compressed air energy storage chamber according to claim 1, wherein: the composite lining layer (6) is a reinforced steel fiber concrete layer, and the thickness of the composite lining layer (6) is 5 cm-10 cm.
4. A seal construction for a compressed air energy storage chamber according to claim 1, wherein: the outer protection layer (7) and the structure working layer (9) are epoxy glass fiber reinforced plastic coatings, the thickness of the outer protection layer (7) is 10-12 mm, and the thickness of the structure working layer (9) is 15-16 mm;
the elastic cushion layer (8) is a butyl rubber cushion layer, and the thickness of the elastic cushion layer (8) is 3-4 mm.
5. A seal construction for a compressed air energy storage chamber according to claim 1, wherein: the inner side wall of the elastic cushion layer (8) is arranged on the outer protection layer (7) through a first adhesive layer, and the outer side wall of the elastic cushion layer (8) is connected with the structural working layer (9) in a sealing mode through a second adhesive layer.
6. A seal construction for a compressed air energy storage chamber according to claim 1, wherein: a plurality of prestressed connecting pieces (10) are arranged in the composite material lining layer (6), the waterproof layer (5) and the surrounding rock body (1).
7. A seal construction for a compressed air energy storage chamber according to claim 6, wherein: the prestressed connecting piece (10) is arranged perpendicular to the inner side wall of the surrounding rock body (1), one end of the prestressed connecting piece (10) stretches into the surrounding rock body (1) for 1-3 m, and the other end of the prestressed connecting piece (10) is flush with the joint of the composite material lining layer (6) and the outer protective layer (7).
8. A monitoring method for a sealing structure of a compressed air energy storage cavity is characterized by comprising the following steps:
step one, construction of a sealing structure on a surrounding rock body:
101, constructing a waterproof layer (5) on the surrounding rock body (1);
102, driving a prestressed connecting piece (10) into the waterproof layer (5); the prestressed connecting piece (10) is arranged perpendicular to the inner side wall of the surrounding rock body (1), and one end of the prestressed connecting piece (10) extends into the surrounding rock body (1) by 1-3 m;
103, constructing a composite material lining layer (6) on the waterproof layer (5);
104, mounting a plurality of pressure sensors (12) on the composite material lining layer (6), and coating an outer protection layer (7); the other end of the prestress connecting piece (10) is flush with the joint of the composite material lining layer (6) and the outer protective layer (7), and the pressure sensor (12) is embedded in the outer protective layer (7);
105, laying an elastic cushion layer (8) on the outer protection layer (7) through an adhesive;
step 106, coating an adhesive on the elastic cushion layer (8) and coating a structural working layer (9);
step two, detecting a sealing structure on the surrounding rock mass:
step 201, injecting compressed air into the cavity (13) until the volume of the compressed air in the cavity (13) is equal to
The pressure sensor (12) detects the pressure in the cavity (13) to obtain an initial pressure value P 0 (ii) a Wherein V represents the volume of the cavity (13);
step 202, after the cavity (13) is static for 24-48 hours, the pressure detected by the pressure sensor (12) is more than 0.8P 0 The leakage rate of the cavity (13) is qualified; otherwise, the leakage rate of the cavity (13) is unqualified, and the step 203 is executed;
step 203, performing leakage repairing on the sealing layer (2), and then repeating the step 201 and the step 202 and performing gas injection detection until the leakage rate of the cavity (13) is qualified;
step three, injecting and monitoring compressed air in the cavity:
step 301, when the leakage rate of the cavity (13) is qualified, continuing to inject compressed air into the cavity (13), and detecting the pressure in the cavity (13) in real time by the pressure sensor (12) and detecting the temperature and humidity in the cavity (13) in real time by the optical fiber temperature and humidity sensor (11) in the process of injecting the compressed air into the cavity (13);
step 302, recording the pressure value detected at the ith detection time as P i The temperature value detected at the ith detection time is recorded as T i The humidity value detected at the ith detection time is denoted as RH i And is combined with P i 、T i And RH i Respectively set to the maximum value P s Temperature set maximum value T s And humidity set maximum value RH s Making a comparison when P i Less than P s ，T i Less than T s ，RH i Less than RH s When the cavity (13) is filled with compressed air, the compressed air is injected into the cavity until the cavity is filled with compressed air, and the injection is stopped; otherwise, stopping injecting the compressed air;
step 303, detecting the pressure in the cavity (13) by the pressure sensor (12) when the injection of the compressed air is stopped to obtain a pressure value P 1 ；
Then, the pressure sensor (12) detects the pressure in the cavity (13) in real time, and the detected pressure is greater than 0.8P 1 The compressed air energy storage of the cavity (13) meets the requirement; otherwise, go to step 304;
and step 304, performing leakage repairing on the sealing layer (2), and then repeating the step two and the step three.
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| CN202310012280.7A CN115962011A (en) | 2023-01-05 | 2023-01-05 | Sealing structure for compressed air energy storage cavity and monitoring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117108358A (en) * | 2023-08-25 | 2023-11-24 | 中国矿业大学 | Underground gas storage cavern combined type drainage and gas leakage monitoring lining system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117108358A (en) * | 2023-08-25 | 2023-11-24 | 中国矿业大学 | Underground gas storage cavern combined type drainage and gas leakage monitoring lining system |
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