CN111442180A - Method for storing compressed air by using tunnel - Google Patents
Method for storing compressed air by using tunnel Download PDFInfo
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- CN111442180A CN111442180A CN201910039326.8A CN201910039326A CN111442180A CN 111442180 A CN111442180 A CN 111442180A CN 201910039326 A CN201910039326 A CN 201910039326A CN 111442180 A CN111442180 A CN 111442180A
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- tunnel
- air
- compressed air
- air bag
- water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17B—GAS-HOLDERS OF VARIABLE CAPACITY
- F17B1/00—Gas-holders of variable capacity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17B—GAS-HOLDERS OF VARIABLE CAPACITY
- F17B1/00—Gas-holders of variable capacity
- F17B1/02—Details
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- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a method for storing compressed air by using a tunnel, which comprises an air compressor and the tunnel, wherein the method is that the tunnel is filled with water, and an air bag made of a material with waterproof and air-proof properties is placed in the tunnel; the air bag is provided with an air conveying pipe, compressed air enters the air bag through the air conveying pipe to achieve the purpose of storing the compressed air, and when the compressed air is needed, the compressed air in the air bag is output through the air conveying pipe; and a reservoir is built on the ground, when the air bag is inflated, water in the tunnel is squeezed out by the air bag and enters the reservoir for storage, when compressed air is output from the tunnel, the water in the reservoir is poured into the tunnel, the water level in the tunnel is kept at the original water level, and therefore the pressure of the compressed air in the air bag is kept unchanged. The invention can be used for saving energy, is not limited by geographical environment, and has the advantages of low investment, simple structure, stable output pressure, high safety and the like.
Description
Technical Field
The invention relates to a method for storing compressed air, in particular to a method for storing compressed air by using a tunnel.
Background
Wind power, sea wave, tide and thermal power plants usually generate surplus power during the power supply in late night, for example, eighty percent of the power in China is thermal power generation, the power consumption is reduced in late night, and a boiler of the thermal power generation still needs to generate power after being incapable of stopping working in night, so that the surplus power can be generated. If unnecessary electric power does not use, can cause the electric wire netting incident on the one hand, on the other hand can cause the valuable energy extravagant, also can't satisfy common people's life needs simultaneously, for example summer needs a large amount of electric power and opens the air conditioner, but night because temperature drops the idle call electric quantity and can reduce, the condition that has electric power not enough daytime and night electric power surplus inevitably. At present, a great amount of fall pumping and generating reservoirs are invested in China and built for storing redundant electric power in the late night, such as Beijing dense cloud pumping and generating reservoirs and Guangzhou white cloud pumping and generating reservoirs. However, building the water pumping and power generating reservoir requires a large amount of investment and relocation of immigrants on one hand, and also requires a certain natural fall condition on the other hand, for example, the water pumping and power generating reservoir cannot be built in the case that no mountain can form a water level fall in the Shanghai. Therefore, how to effectively store the surplus electric energy late at night is related to the safety of the national power grid, the domestic electricity and the national energy demand of common people, and the method has very important economic and social benefits.
The energy storage by using compressed air is a common energy storage method, and related patents are reported at present. Patent application No. 200410022747.3 published by the chinese patent office at 2005.12.14 entitled "power station using compressed air for energy storage in abandoned mine" discloses a method for storing energy by using compressed air, which achieves the purpose of storing energy, but has the disadvantage of unstable pressure and poor quality of released energy. For energy, the quality is very important, for example, when compressed air is used for power generation, the pressure of the compressed air is gradually reduced along with the continuous output of the compressed air, the power of the generator is constant, and the pressure reduction can cause the continuous change of the output of the generated electricity, so that potential safety hazards are brought to a power grid. As for a patent with patent application No. CN200810037213.6 and entitled "a method for storing energy by using midnight steam of a power plant" applied by the inventor at 2008.05.09, the patent adopts a method for storing energy by using compressed air by using steam of a midnight thermal power plant, but the method does not solve the technical problem of how to ensure the pressure stability of the stored compressed air. For example, the patent application No. CN200910048571.1, entitled "a method for storing electric energy using abandoned mine", which is filed by 2009.03.31, does not effectively solve the technical problem of how to store energy efficiently and stably.
Disclosure of Invention
In view of the above problems and needs in the art, it is an object of the present invention to provide a method for storing compressed air using a tunnel.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for storing compressed air by using a tunnel comprises an air compressor and the tunnel, wherein the method comprises the steps of filling the tunnel with water, and placing an air bag made of a material with waterproof and air-proof properties in the tunnel; the air bag is provided with an air conveying pipe, compressed air enters the air bag through the air conveying pipe to achieve the purpose of storing the compressed air, and when the compressed air is needed, the compressed air in the air bag is output through the air conveying pipe; and a reservoir is built on the ground, when the air bag is inflated, water in the tunnel is squeezed out by the air bag and enters the reservoir for storage, when compressed air is output from the tunnel, the water in the reservoir is poured into the tunnel, the water level in the tunnel is kept at the original water level, and therefore the pressure of the compressed air in the air bag is kept unchanged.
The storage of energy sources is very important, such as: more than 80% of electricity in China is generated by coal, but in late night, the electricity is abundant, and because the coal-fired boiler cannot stop working, the excess of steam is stored everywhere. At present, some foreign electric power companies establish large pressure vessels on the ground for storing compressed air, but the large pressure vessels are high in manufacturing cost, large in investment, especially poor in safety and very dangerous. The invention uses the late night electricity to drive the air compressor, stores the compressed air in the tunnel, and outputs the compressed air to drive the generator to generate electricity when the electricity consumption is in peak in the daytime, thereby effectively utilizing the energy; in particular, the invention adopts the method of storing compressed air in the tunnel, and has low cost, less investment and high safety. Although a method for storing compressed air is also used, the pressure of the compressed air inside is unstable due to unstable water level in the current method, especially when the compressed air is output outwards to push a compressed air generator to generate electricity, the pressure of the compressed air is continuously reduced along with the continuous output (for example, the original compressed air pressure is 100 atmospheres, and the original compressed air pressure is gradually reduced along with the output, and is reduced from 100 atmospheres to 95 to 90 atmospheres or even lower), and the power of the compressed air generator is constant, and the power of the generated electricity is also continuously reduced along with the reduction of the pressure, so that the quality of the electricity is reduced, and the power grid fluctuates, and a safety hazard is generated. In the invention, the reservoir is connected with the tunnel, so that the water level in the tunnel is lowered, the water in the reservoir supplements the tunnel, and the water level in the tunnel is kept unchanged, thereby keeping the pressure of the compressed air in the air bag unchanged, ensuring stable power and high quality.
Preferably, the inner surface of the tunnel is waterproofed to prevent water in the tunnel from leaking. Because the geographic conditions of each place are different, some tunnels can seep water, so that the stability of the water level in the tunnels cannot be ensured.
In a further preferred embodiment, the waterproofing treatment is to attach a waterproof bag to the inner surface of the tunnel. There are many methods for waterproofing the inner surface of the tunnel, but the simplest and most effective method is to install a waterproof bag on the inner surface of the tunnel, which is not only low in cost and convenient to install, but also convenient to maintain.
According to the preferable scheme, a sealing cover is installed at the ground opening, an air bag air conveying pipe and a water conveying pipe are installed on the sealing cover, the air conveying pipe is connected with compressed air, an air compressor and a compressed air generator, and the water conveying pipe is connected with a water storage tank. After compressed air generated by the air compressor enters the air bag through the air conveying pipe, the volume of the air bag is enlarged, so that water in the tunnel is discharged, and the discharged water enters the water storage tank through the water conveying pipe. When compressed air output in the air bag drives the compressed air generator to generate electricity, water in the reservoir can enter the tunnel through the water delivery pipe to keep the stability of water pressure in the tunnel, so that the stability of the pressure of the output compressed air is ensured, the emitted electricity is stable, and the quality is high.
Preferably, the air bag is fixedly connected with the tunnel. The specific gravity of the gas is far less than that of water, so the gas bag can float in the water, and the gas bag can be prevented from floating in the tunnel after being connected with the tunnel.
Preferably, the shape of the air bag is adapted to the shape of the tunnel. When the two shapes are the same, the air bag is easy to install and fix.
As a preferred scheme, the air bag is placed in a steel wire mesh cage, and the shape of the steel wire mesh cage is matched with the shape of the tunnel. The air bag is easier to install and fix by the wire mesh cage.
Preferably, the compressed air is generated by directly driving an air compressor by a steam engine. At present, the air compressor is driven by electricity to compress air, but in the steam power generation process, a part of energy is lost due to the fact that electric energy is converted into mechanical energy, and the steam-driven air compressor is directly driven by the steam, so that the utilization rate of the energy is higher.
Preferably, a safety valve is arranged on the air bag, and when the pressure of the compressed air exceeds a preset pressure, the safety valve automatically releases the pressure and gives an alarm, so that the safety and the service life of the air bag are ensured.
Preferably, the tunnel is an abandoned mine. Therefore, the reconstruction and utilization of the abandoned mine can be realized, and the cost is lower.
Compared with the prior art, the invention has the following remarkable beneficial effects:
1. the manufacturing cost is low: compared with the method for storing energy by utilizing the fall of a reservoir, the method has the advantages that the cost is far lower than that of water pumping and power generation;
2. the electric power quality is high: when the existing compressed air storage technology outputs electric power, the power of the generated electric power is continuously reduced due to continuous reduction of pressure, so that the quality of the electric power is low, and an electric network is unsafe;
3. without being limited by geographical conditions: the existing power generation at night usually adopts a pumping power station, but the pumping power station can be built only under certain geographical conditions, and an upper water reservoir and a lower water reservoir can be built only under certain fall.
Drawings
FIG. 1 is a schematic structural view illustrating a method for storing compressed air using a tunnel according to an embodiment of the present invention;
the reference numbers are schematically shown below: 1. soil; 2. a tunnel; 3. a tunnel surface; 4. an air bag; 5. a pipeline water delivery pipe; 6. a reservoir; 7. a water pipe valve; 8. water; 9. a compressed air valve; 10. an air bag fixing member; 11. a gas delivery pipe.
Detailed Description
The technical solution of the present invention will be further fully described in detail with reference to the following embodiments and accompanying drawings.
Examples
Referring to fig. 1, the present embodiment provides a method for storing compressed air in a tunnel, which comprises:
the underground water-saving and water-proof device is provided with an air compressor (not shown) and an underground tunnel 2, wherein the underground tunnel 2 can directly adopt the existing abandoned mine, or directly excavate the underground tunnel 2 in soil 1 as shown in figure 1, carry out water-proof treatment on the surface 3 of the underground tunnel, install a sealing cover (not shown) at the opening of the underground tunnel 2, and install an underground water delivery pipe 5 on the sealing cover;
filling water 8 into the tunnel 2, placing an air bag 4 made of a material with waterproof and air-proof performance (the material is commercially available) at the bottom of the tunnel 2, placing the air bag 4 in a steel wire mesh cage (not shown) and fixing the air bag 4 in the tunnel 2 through an air bag fixing piece 10, wherein the shape of the air bag 4 is the same as that of the tunnel 2;
the air bag 4 is provided with an air pipe 11, the air pipe 11 can be provided with a compressed air valve 9, the compressed air valve 9 is opened, compressed air enters the air bag 4 through the air pipe 11 to achieve the purpose of storing the compressed air, the air bag 4 can also be provided with a safety valve (not shown), and when the pressure of the compressed air exceeds the preset pressure, the safety valve automatically releases the pressure and gives an alarm;
when the compressed air is needed, the compressed air in the air bag 4 is output through the air pipe 11;
establishing a reservoir 6 on the ground of the soil 1, wherein the reservoir 6 is communicated with a tunnel water pipe 5, the height of the tunnel water pipe 5 on the ground is higher than that of the reservoir 6, a water pipe valve 7 is arranged between the reservoir 6 and the tunnel water pipe 5, and the water pipe valve 7 is opened, so that the tunnel water pipe 5 is communicated with water 8 in the reservoir 6; when the air bag 4 is inflated (the compressed air valve 9 is opened, compressed air is input into the air bag 4, namely the air bag 4 can be inflated), the volume of the air bag 4 is increased, the water pipe valve 7 is opened, and water 8 in the underground passage 2 is extruded by the air bag 4 with the increased volume and enters the water storage tank 6 from the underground passage water pipe 5 for storage;
when the compressed air in the tunnel 2 is required to be used for generating power, the compressed air valve 9 is opened, the compressed air is output from the air bag 4 in the tunnel 2, the output compressed air can be used for driving a generator (not shown) to generate power, the pressure of the compressed air is gradually reduced along with the output of the compressed air in the air bag 4, at the moment, the water 8 in the water storage tank 6 is poured into the tunnel 2 through the tunnel water pipe 5, the height difference between the water storage tank 6 and the tunnel 2 is fixed, so that the water level in the tunnel 2 can be kept at the original water level, the stability of the water pressure is ensured, the water 8 supplements the reduction of the volume of the air bag 4, meanwhile, the height of the tunnel water pipe 5 on the ground is higher than that of the water storage tank 6, the water 8 cannot be blown out from the upper surface, the stability of the water pressure further ensures that the pressure of the compressed air in the air bag 4 is not changed, and the stability of the pressure of the compressed air output, and the generated power is stable and the quality of the power is high.
Finally, it should be pointed out here that: the above is only a part of the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention, and the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above description are intended to be covered by the present invention.
Claims (10)
1. A method of storing compressed air using a tunnel, comprising an air compressor and a tunnel, characterized in that: the method is that the tunnel is filled with water, and an air bag made of materials with waterproof and air-proof performance is placed in the tunnel; the air bag is provided with an air conveying pipe, compressed air enters the air bag through the air conveying pipe to achieve the purpose of storing the compressed air, and when the compressed air is needed, the compressed air in the air bag is output through the air conveying pipe; and a reservoir is built on the ground, when the air bag is inflated, water in the tunnel is squeezed out by the air bag and enters the reservoir for storage, when compressed air is output from the tunnel, the water in the reservoir is poured into the tunnel, the water level in the tunnel is kept at the original water level, and therefore the pressure of the compressed air in the air bag is kept unchanged.
2. The method of claim 1, wherein: the inner surface of the tunnel is subjected to waterproof treatment to prevent water in the tunnel from leaking.
3. The method of claim 2, wherein: the waterproof treatment is to install a waterproof bag on the inner surface of the tunnel.
4. The method of claim 1, wherein: the ground opening is provided with a sealing cover, the sealing cover is provided with an air bag air delivery pipe and a water delivery pipe, the air delivery pipe is connected with compressed air, an air compressor and a compressed air generator, and the water delivery pipe is connected with a reservoir.
5. The method of claim 1, wherein: the air bag is fixedly connected with the tunnel.
6. The method of claim 1, wherein: the shape of the air bag is matched with the shape of the tunnel.
7. The method of claim 1, wherein: the air bag is placed in the steel wire mesh cage, and the shape of the steel wire mesh cage is matched with the shape of the tunnel.
8. The method of claim 1, wherein: the compressed air is generated by directly driving an air compressor by a steam engine.
9. The method of claim 1, wherein: and a safety valve is arranged on the air bag, and when the pressure of the compressed air exceeds the preset pressure, the safety valve automatically releases the pressure and gives an alarm.
10. The method of claim 1, wherein: the tunnel is an abandoned mine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910039326.8A CN111442180A (en) | 2019-01-16 | 2019-01-16 | Method for storing compressed air by using tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910039326.8A CN111442180A (en) | 2019-01-16 | 2019-01-16 | Method for storing compressed air by using tunnel |
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| CN111442180A true CN111442180A (en) | 2020-07-24 |
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| CN201910039326.8A Pending CN111442180A (en) | 2019-01-16 | 2019-01-16 | Method for storing compressed air by using tunnel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113108234A (en) * | 2021-04-16 | 2021-07-13 | 菏泽城建置业有限公司 | Gas storage device for serving village revivification |
| CN113931693A (en) * | 2021-10-08 | 2022-01-14 | 中国科学院电工研究所 | Comprehensive physical energy storage system |
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| CN2366581Y (en) * | 1999-03-24 | 2000-03-01 | 浙江衢州煤矿机械总厂 | Air compressor for increasing pressure in coal mine |
| CN101514691A (en) * | 2008-02-22 | 2009-08-26 | 上海奇谋能源技术开发有限公司 | Method for storing energy by compressing air with water pressure generated in mine |
| CN101514690A (en) * | 2008-02-22 | 2009-08-26 | 上海奇谋能源技术开发有限公司 | Method for energy storage in cave by compressing air with artificial water pressure |
| CN103899909A (en) * | 2014-04-15 | 2014-07-02 | 太原融盛科技有限公司 | Piston cylinder type compressed air energy storage device |
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| CN108916105A (en) * | 2018-07-09 | 2018-11-30 | 中国矿业大学 | Constant-pressure compressed air energy storage device |
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2019
- 2019-01-16 CN CN201910039326.8A patent/CN111442180A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5779092A (en) * | 1996-10-01 | 1998-07-14 | Mega Corporation | Baffle system for tank |
| CN2366581Y (en) * | 1999-03-24 | 2000-03-01 | 浙江衢州煤矿机械总厂 | Air compressor for increasing pressure in coal mine |
| CN101514691A (en) * | 2008-02-22 | 2009-08-26 | 上海奇谋能源技术开发有限公司 | Method for storing energy by compressing air with water pressure generated in mine |
| CN101514690A (en) * | 2008-02-22 | 2009-08-26 | 上海奇谋能源技术开发有限公司 | Method for energy storage in cave by compressing air with artificial water pressure |
| CN103899909A (en) * | 2014-04-15 | 2014-07-02 | 太原融盛科技有限公司 | Piston cylinder type compressed air energy storage device |
| CN207526640U (en) * | 2017-04-26 | 2018-06-22 | 西安新维度能源技术发展有限公司 | One kind is used for ventilation off gas of coal compressed energy-storage electricity generation system |
| CN108916105A (en) * | 2018-07-09 | 2018-11-30 | 中国矿业大学 | Constant-pressure compressed air energy storage device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113108234A (en) * | 2021-04-16 | 2021-07-13 | 菏泽城建置业有限公司 | Gas storage device for serving village revivification |
| CN113931693A (en) * | 2021-10-08 | 2022-01-14 | 中国科学院电工研究所 | Comprehensive physical energy storage system |
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Application publication date: 20200724 |