CN118293350A - Automatic pressure stabilizing water curtain sealing underground gas storage - Google Patents
Automatic pressure stabilizing water curtain sealing underground gas storage Download PDFInfo
- Publication number
- CN118293350A CN118293350A CN202410264823.9A CN202410264823A CN118293350A CN 118293350 A CN118293350 A CN 118293350A CN 202410264823 A CN202410264823 A CN 202410264823A CN 118293350 A CN118293350 A CN 118293350A
- Authority
- CN
- China
- Prior art keywords
- gas storage
- storage hole
- water
- water curtain
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 229
- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 9
- 238000007789 sealing Methods 0.000 title abstract description 25
- 238000004146 energy storage Methods 0.000 claims abstract description 22
- 230000008859 change Effects 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 17
- 238000010248 power generation Methods 0.000 claims abstract description 12
- 230000006641 stabilisation Effects 0.000 claims abstract description 7
- 238000011105 stabilization Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000011150 reinforced concrete Substances 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims 9
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 127
- 230000009471 action Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 238000003491 array Methods 0.000 description 3
- 235000019994 cava Nutrition 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses an automatic pressure stabilizing water curtain sealing type underground gas storage. The gas storage comprises a gas storage hole positioned underground, wherein the bottom of the gas storage hole is communicated with a pressure water conveying pipeline, a valve is arranged at the position, close to the gas storage hole, of the pressure water conveying pipeline, and the extending end of the pressure water conveying pipeline is communicated to the inside of a high-level reservoir and is used for conveying high-pressure water in the high-level reservoir; the high-level reservoir Gao Chengda is located at the height of the air storage hole, when the air storage hole is in the process of air release power generation/inflation energy storage, high-pressure water continuously flows from the high-level reservoir to the air storage hole or continuously flows from the air storage hole to the high-level reservoir through the pressure water conveying pipeline, the water level amplitude of the high-level reservoir is within a set change range, and therefore the air pressure in the air storage hole is maintained within the set change range, and the purpose of automatic pressure stabilization in the air storage hole is achieved. The invention solves a series of problems of high sealing construction cost, high gas storage hole construction cost, low compressed air energy storage efficiency and the like in the prior engineering, and reduces the running cost.
Description
Technical Field
The invention relates to the technical field of underground energy storage, in particular to an automatic pressure stabilizing water curtain sealing type underground gas storage.
Background
The compressed air energy storage technology utilizes a compressor to compress air to a high-pressure state, and the air is stored in underground caves such as salt caves and artificial chambers or ground high-pressure containers in a sealing manner, and the compressed air pushes a turbine to do work to generate electricity during discharging, so that the novel electric energy storage technology is low in cost, large in capacity, long in time, high in efficiency and capable of being flexibly arranged. The energy storage technology can enhance the peak regulation capability of the power system, improve the power supply reliability and the new energy consumption capability, provide frequency modulation, standby, rotational inertia and accident emergency recovery service for the system, and improve the efficiency, stability and safety of the power system, and is considered as one of the large-scale energy storage technologies with the most wide development prospect.
The compressed air energy storage gas storage hole type mainly comprises salt caves, artificial chambers, abandoned mines, ground pipeline steel pipelines or tube bundles (arrays) and the like. The cost of the ground pipeline steel pipelines or tube bundles (arrays) is high due to the limited salt cavern resources, so that the application range of the pipeline steel pipelines or tube bundles (arrays) is limited; in addition, the artificial chamber can basically get rid of the limitations of various aspects such as geographical conditions, and the novel gas storage mode with site selection flexibility for large-scale compressed air energy storage projects is improved, so that more and more attention is paid in recent years, and richer implementation experience is gradually accumulated; finally, the abandoned mine is rich in resources and has larger application potential. In order to meet the requirement of compressed air energy storage, underground gas storage holes such as an artificial chamber, a abandoned mine and the like all meet the requirements of air tightness and sufficient space capacity.
In the aspect of air tightness, the manual chamber and the abandoned mine in the prior art are mainly sealed by steel plates, but the steel plates have higher manufacturing cost, high construction difficulty and difficult operation and maintenance.
In terms of space capacity, about 70% -80% of bedding gas in an artificial chamber and a abandoned mine in the prior art cannot be utilized due to pressure amplitude, pressure grade and other reasons, the effective utilization rate of the gas storage hole space is only 20% -30%, the space utilization rate is low, the gas storage hole investment is large in the whole engineering investment, the economy of the whole project is affected, and the popularization of the compressed air energy storage technology is hindered.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the automatic pressure-stabilizing water curtain sealing type underground gas storage, which has the advantages of lower cost of sealing equipment, small construction difficulty, simple operation and maintenance, and control of the pressure change range in the storage within 5% in the process of deflation power generation and/or inflation energy storage, thereby improving the power generation efficiency and the compression energy storage efficiency, and reducing the occupation ratio of the investment of gas storage holes in the whole engineering investment.
In order to achieve the above purpose, the invention provides an automatic pressure stabilizing water curtain sealing type underground gas storage, which comprises a gas storage hole positioned underground, and is characterized in that: the top of the gas storage hole is communicated with a gas injection and production pipe, the bottom of the gas storage hole is communicated with a pressure water conveying pipeline, a valve is arranged at the position, close to the gas storage hole, of the pressure water conveying pipeline, and the extending end of the pressure water conveying pipeline is communicated to the inside of the high-level reservoir and is used for conveying high-pressure water in the high-level reservoir;
The high-level reservoir Gao Chengda is located at the height of the gas storage hole, when the gas storage hole is in the process of gas release power generation/gas charging energy storage, high-pressure water continuously flows from the high-level reservoir to the gas storage hole or continuously flows from the gas storage hole to the high-level reservoir through the pressure water delivery pipeline, the water level amplitude of the high-level reservoir is within a set change range, and therefore the gas pressure in the gas storage hole is maintained within the set change range, and the purpose of automatic pressure stabilization in the gas storage hole is achieved;
The water curtain main pipeline is characterized in that a booster pump is arranged outside the air storage hole, the booster pump is used for increasing the water pressure in the pump to a set pressure, the water absorbing end of the booster pump is connected with high-pressure water in the air storage hole, the water outlet end of the booster pump is connected with a water curtain system, the water curtain system comprises a water curtain main pipeline arranged at the outer top end of the air storage hole, the extending direction of the water curtain main pipeline is parallel to the extending direction of the air storage hole, two sides of the water curtain main pipeline are respectively communicated with a row of water curtain branch pipelines which are axially and alternately arranged, the water outlet end of each water curtain branch pipeline is communicated with a water curtain hole, and each water curtain hole extends from the outer upper side of the air storage hole to the outer bottom of the air storage hole, so that pressurized water flowing into the water curtain hole is sealed at the outer upper side of the air storage hole and forms a water curtain at the side of the air storage hole, and the air leakage of the air storage hole is controlled.
Further, a gate leading to the ground is arranged at the position, close to the high-level reservoir, of the pressure water pipeline, and the gate is used for emergency braking during maintenance of the gas storage hole.
Further, the height difference between the high-level reservoir and the gas storage hole is more than 700m, and the storage capacity of the high-level reservoir is more than or equal to 1.5 times of the storage capacity of the gas storage hole.
Furthermore, in the process of deflation and power generation of the gas storage hole, high-pressure water continuously flows to the gas storage hole from a high-level reservoir, the water level amplitude of the high-level reservoir is within a variation range of 30m, so that the gas pressure in the gas storage hole is maintained within a variation range of 5%, and the purpose of automatic pressure stabilization of the gas storage hole is achieved;
In the process of inflating and storing energy of the gas storage hole, high-pressure water continuously flows from the gas storage hole to the high-level reservoir, the water level amplitude of the high-level reservoir is within the variation range of 30m, and therefore the gas pressure in the gas storage hole is maintained within the variation range of 5%, and the purpose of automatically stabilizing the pressure of the gas storage hole is achieved.
Furthermore, the pressure water pipeline adopts a prestressed reinforced concrete lining structure, and the water flow speed in the pipeline is 4-8 m/s.
Further, a water curtain chamber is cut at the outer top of the gas storage hole, the booster pump is arranged in the water curtain chamber, and the main water curtain pipeline is arranged in the water curtain chamber.
Further, the booster pump is used for increasing the water pressure in the pump by 0.4-0.6 MPa.
Further, the water outlet end of the booster pump is also connected with a drain pipe extending to the ground, and the booster pump is used for overhauling the drain pump.
Further, the distance between each row of adjacent water curtain branch pipelines is 2-4 m, the distance between each adjacent water curtain holes is 2-4 m, and the aperture of each water curtain hole is 108mm.
Furthermore, the main water curtain pipeline and the branch water curtain pipeline are seamless steel pipes, a thrust ring is sleeved on the branch water curtain pipeline, and concrete is adopted between the thrust ring and the rock for blocking.
The invention has the advantages that:
1. According to the invention, the high-level reservoir is connected with the underground gas storage hole through the pressure water conveying pipeline, in the process of discharging and generating electricity, water automatically flows from the high-level reservoir to the underground gas storage hole under the action of gravity, when the discharging is finished, the water is basically filled in the gas storage hole, all gas in the gas storage hole can be used for generating electricity by acting, the effective utilization rate of the space of the gas storage hole is greatly improved, the pressure change amplitude of the gas storage hole is within 0.3Mpa as the water level change is smaller than 30m, the gas pressure change is extremely small (the running pressure in the gas storage hole is usually greater than 10 Mpa) and is within about 5%, so that the pressure in the gas storage hole is automatically stabilized, the turbine expander is stably operated under the rated working condition, and the generating efficiency is improved;
2. In the process of inflation energy storage, the gas pressure of the gas storage hole in the conventional scheme is increased from 0.1MPa to 10MPa, and the temperature rise is increased by tens of degrees to hundreds of degrees at different inflation speeds, so that the lining structure of the gas storage hole is greatly damaged; according to the invention, the high-level reservoir is connected with the underground gas storage hole through the pressure water conveying pipeline, in the process of inflating and storing energy, water automatically flows from the underground gas storage hole to the high-level reservoir under the action of gas pressure, the change of the water level in the high-level reservoir is smaller and is generally smaller than 30m, the change amplitude of the gas storage hole pressure is within 0.3Mpa, the change of the gas pressure is extremely small (the running pressure in the gas storage hole is generally greater than 10 Mpa) and is within about 5%, so that the pressure in the gas storage hole is automatically stabilized, the compressor is stably operated under the rated working condition, and the compression and energy storage efficiency is improved;
3. According to the invention, the water curtain hole completely covers the upper side of the air storage hole, and the high-pressure water in the air storage hole is slightly pressurized into pressurized water through the pressurizing action of the pressurizing pump, so that the pressurized water flowing into the water curtain hole forms water curtain sealing above and at the side of the air storage hole, and the water curtain sealing is formed because the pressure of the water curtain is higher than that of the gas, thereby achieving the purpose of preventing gas leakage, and in addition, the conventional steel plate sealing which is high in cost and inconvenient to overhaul is omitted, only the pressurized water is needed during operation, and the operation is economical;
4. The booster pump is also used as an overhaul drainage pump, so that accumulated water and permeated water in the air storage hole are discharged under an overhaul working condition, and the booster pump is multipurpose, so that the system is further simplified, and the initial investment is reduced;
The automatic pressure-stabilizing water curtain sealing type underground gas storage combines water curtain sealing with a hydraulic pressure-stabilizing gas storage hole, solves a series of problems of high sealing construction cost, high gas storage hole construction cost, low compressed air energy storage efficiency and the like in the current engineering, reduces the running cost, and increases the reliability and convenience.
Drawings
FIG. 1 is a schematic cross-sectional view of an automatic pressure stabilizing water curtain sealed underground gas storage of the present invention;
FIG. 2 is an isometric view of a water curtain system and a gas reservoir segment according to the present invention;
FIG. 3 is a detailed view of the water curtain system of the present invention;
in the figure: a high-level reservoir 1, a pressure water pipeline 2, a gas storage hole 3, a booster pump 4, a water curtain system 5 and a gas injection and production pipe 6;
The pressurized water pipe 2 includes: a valve 2-1 and a gate 2-2;
The water curtain system 5 comprises: the water curtain main pipeline 5-1, the water curtain branch pipeline 5-2, the water curtain holes 5-3, the water curtain chamber 5-4 and the thrust collar 5-5.
Detailed Description
The invention is described in further detail below with reference to the drawings and specific examples.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the invention.
As shown in fig. 1-3, the automatic pressure-stabilizing water curtain sealing type underground gas storage comprises a gas storage hole 3 positioned underground, wherein the top of the gas storage hole 3 is communicated with a gas injection and production pipe 6, the bottom of the gas storage hole 3 is communicated with a pressure water delivery pipe 2, a valve 2-1 is arranged at the position, close to the gas storage hole 3, of the pressure water delivery pipe 2, and the extending end of the pressure water delivery pipe 2 is communicated to the inside of a high-level reservoir 1 and is used for delivering high-pressure water in the high-level reservoir 1.
The height of the high-level reservoir 1 is larger than that of the air storage hole 3, when the air storage hole 3 is in the process of deflation power generation/inflation energy storage, high-pressure water continuously flows from the high-level reservoir 1 to the air storage hole 3 or continuously flows from the air storage hole 3 to the high-level reservoir 1 through the pressure water conveying pipeline 2, and the water level amplitude of the high-level reservoir 1 is in a set change range, so that the gas pressure in the air storage hole 3 is maintained in the set change range, and the purpose of automatic pressure stabilization in the air storage hole 3 is achieved.
The valve 2-1 is arranged in the underground passage leading to the air storage 3, and is used for closing or opening the high-pressure water flowing to the air storage 3 in the underground passage by workers.
Preferably, the pressure water conveying pipeline 2 is provided with a gate 2-2 which is communicated with the ground near the high-level reservoir 1, and the gate 2-2 is used for emergency braking when the air storage hole 3 is overhauled. The gate 2-2 is arranged so that the gas storage hole 3 can be conveniently closed or opened by staff on the ground to flow high-pressure water to the gas storage hole 3 during emergency braking.
The gas storage hole 3 is an underground space with a certain volume, the volume of the underground space needs to meet the requirements of compressed air storage, gas injection and production safety height difference, gas leakage loss and safety redundancy, supporting measures such as lining, grouting, anchor rods and the like are adopted, sealing measures are needed to ensure the safety and stability of the underground space in excavation, gas storage operation, emptying maintenance and the like, and the gas leakage quantity is controlled within 3%.
The pressure water pipeline 2 is a connecting pipe between the high-level reservoir 1 and the underground gas storage 3, is suitable for water to flow bidirectionally in the connecting pipe, and can adopt various structural forms such as lining-free, concrete lining, reinforced concrete lining, prestressed reinforced concrete lining and the like.
Preferably, the pressure water pipe 2 adopts a prestressed reinforced concrete lining structure, and the water flow speed in the pipe is 4-8 m/s.
The high-level reservoir 1 and the underground gas storage hole 3 have a certain height difference and are higher than the underground gas storage hole 3, the common height difference is more than 700m, in addition, the volume of the high-level reservoir 1 needs to meet the water consumption of the gas storage hole 3 for water filling, reservoir flood control, reservoir leakage, reservoir evaporation, connecting pipe leakage, water curtain leakage and the like, meanwhile, the reservoir water level amplitude is smaller, namely, the difference between the normal water storage level and the dead water level is smaller, the high-level reservoir can be in various forms such as a natural lake, an artificial reservoir or an underground water storage tank, and the like, so long as the requirements of the height difference, the reservoir capacity and the water level amplitude are met. If the high-level reservoir 1 is an artificial reservoir, a local material dam, namely an earth-rock dam or a dyke is generally built, and the high-level reservoir is formed by combining terrains.
Preferably, the height difference between the high-level reservoir 1 and the gas storage hole 3 is more than 700m, and the storage capacity of the high-level reservoir 1 is more than or equal to 1.5 times of the storage capacity of the gas storage hole 3.
Preferably, in the process of deflation and power generation of the gas storage hole 3, high-pressure water continuously flows from the high-level reservoir 1 to the gas storage hole 3, the water level amplitude of the high-level reservoir 1 is changed within a range of 30m, so that the gas pressure in the gas storage hole 3 is maintained within a range of 5%, and the purpose of automatic pressure stabilization of the gas storage hole 3 is achieved;
In the process of inflating and storing energy, high-pressure water continuously flows from the air storage hole 3 to the high-level reservoir 1, and the water level amplitude of the high-level reservoir 1 is within a variation range of 30m, so that the gas pressure in the air storage hole 3 is maintained within a variation range of 5%, and the purpose of automatically stabilizing the air storage hole 3 is achieved.
The high-level reservoir 1 is connected with the underground gas storage hole 3 through the pressure water pipeline 2, water automatically flows from the high-level reservoir 2 to the underground gas storage hole 3 under the action of gravity in the process of deflation and power generation, when the deflation is finished, the gas storage hole 3 is basically full of water, all gases in the gas storage hole 3 can be used for acting and power generation, the effective utilization rate of the space of the gas storage hole 3 is greatly improved, and the pressure change amplitude of the gas storage hole 3 is within 0.3Mpa because the water level change in the high-level reservoir 1 is smaller and is generally smaller than 30m, the gas pressure change is extremely small (the running pressure in the gas storage hole is generally larger than 10 Mpa) and is within about 5%, so that the pressure in the gas storage hole 3 is automatically stabilized, the turbine expander is stabilized to run under the rated working condition, and the power generation efficiency is improved.
In the process of inflation energy storage, the gas pressure of the gas storage hole in the conventional scheme is increased from 0.1MPa to 10MPa, and the temperature rise is increased by tens of degrees to hundreds of degrees at different inflation speeds, so that the lining structure of the gas storage hole is greatly damaged. According to the invention, the high-level reservoir 1 and the underground gas storage hole 3 are connected through the pressure water conveying pipeline 2, in the process of inflating and storing energy, water automatically flows from the underground gas storage hole 3 to the high-level reservoir 1 under the action of gas pressure, and the pressure change of the gas storage hole 3 is smaller than 0.3Mpa and smaller than 30m because the water level change in the high-level reservoir 1 is smaller, the gas pressure change is extremely small (the running pressure in the gas storage hole is usually greater than 10 Mpa) and is about within 5%, so that the pressure in the gas storage hole 3 is automatically stable, the compressor is stably operated under the rated working condition, and the compression and energy storage efficiency is improved.
The water curtain system comprises a water curtain main pipe 5-1 arranged at the outer top end of the air storage hole 3, wherein the extending direction of the water curtain main pipe 5-1 is parallel to the extending direction of the air storage hole 3, two sides of the water curtain main pipe 5-1 are respectively communicated with a row of water curtain branch pipes 5-2 which are arranged at intervals along the axial direction, each row of water curtain branch pipes 5-2 cover the outer upper part of the air storage hole 3, the water outlet end of each water curtain branch pipe 5-2 is communicated with a water curtain hole 5-3, and each water curtain hole 5-3 extends to the outer bottom of the air storage hole 3 from the outer upper part of the air storage hole 3, so that pressurized water flowing into the water curtain holes 5-3 forms water curtain sealing at the outer upper part and the side of the air storage hole 3, and the air leakage of the air storage hole 3 is controlled.
The water curtain branch pipeline 5-2 adopts a seamless steel pipe DN89, the lower end of the seamless steel pipe is connected with the water curtain hole 5-3, and the water curtain hole 5-3 extends to the bottom of the gas storage hole 3.
Specifically, the booster pump 4 is used for increasing the water pressure in the pump by 0.4-0.6 MPa. In the embodiment, after the booster pump 4 slightly boosts 0.5MPa, the water outlet side is connected with the water curtain hole 5-3, the water curtain hole 5-3 completely covers the upper part and the side of the air storage hole 3, and the water curtain pressure is higher than the gas pressure in the warehouse, so that a closed water curtain seal is formed, and gas leakage is prevented.
Preferably, the distance between each row of adjacent water curtain branch pipelines 5-2 is 2-4 m, the distance between each adjacent water curtain holes 5-3 is 2-4 m, and the aperture of each water curtain hole 5-3 is 108mm.
Specifically, the main water curtain pipeline 5-1 and the branch water curtain pipeline 5-2 are seamless steel pipes, a thrust collar 5-5 is sleeved on the branch water curtain pipeline 5-2, and concrete is adopted between the thrust collar 5-5 and the rock for blocking. The water curtain holes 5-3 are holes formed by underground drilling excavation, and the periphery of the pipe is plugged after the pipe is installed.
According to the invention, the water curtain holes 5-3 completely cover the upper part and the side parts of the air storage hole 3, and then the high-pressure water in the air storage hole 3 is pressurized into pressurized water by the pressurizing action of the pressurizing pump 4, so that the pressurized water flowing into the water curtain holes 5-3 forms water curtain sealing above and at the side of the air storage hole 3, and the water curtain pressure is higher than the gas pressure, so that a closed water curtain sealing is formed, the aim of preventing gas leakage is achieved, the conventional steel plate sealing with high manufacturing cost and inconvenient maintenance is omitted, and only the pressurized water is needed during operation, so that the operation is economical.
Preferably, a water curtain chamber 5-4 is cut at the top outside the gas storage hole 3, the booster pump 4 is arranged in the water curtain chamber 5-4, and the water curtain main pipeline 5-1 is arranged in the water curtain chamber 5-4.
Preferably, the water outlet end of the booster pump 4 is also connected with a drain pipe extending to the ground, the booster pump 4 is used as an overhaul drainage pump, accumulated water and permeated water in the air storage hole are discharged under an overhaul working condition, and the system is further simplified and initial investment is reduced.
The specific construction sequence of the automatic pressure-stabilizing water curtain sealing type underground gas storage is as follows: building a high-level reservoir, constructing a construction hole, excavating or trimming a gas storage hole, excavating a water curtain chamber, excavating a water curtain Kong Kaiwa, excavating a high-pressure water conveying pipeline, lining the gas storage hole, constructing the high-pressure water conveying pipeline, checking the structural strength to be qualified, installing electromechanical equipment such as a booster pump, performing a water injection test, performing a gas injection test and performing system operation.
The automatic pressure-stabilizing water curtain sealing type underground gas storage combines water curtain sealing with a hydraulic pressure-stabilizing gas storage hole, solves a series of problems of high sealing construction cost, high gas storage hole construction cost, low compressed air energy storage efficiency and the like in the current engineering, reduces the running cost, and increases the reliability and convenience.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an automatic water curtain sealed underground gas storage of steady voltage, includes gas storage hole (3) that are located underground, its characterized in that: the top of the gas storage hole (3) is communicated with a gas injection and production pipe (6), the bottom of the gas storage hole (3) is communicated with a pressure water conveying pipeline (2), a valve (2-1) is arranged at the position, close to the gas storage hole (3), of the pressure water conveying pipeline (2), and the extending end of the pressure water conveying pipeline (2) is communicated to the inside of the high-level reservoir (1) and is used for conveying high-pressure water in the high-level reservoir (1);
The high-level reservoir (1) Gao Chengda is located at the height of the gas storage hole (3), when the gas storage hole (3) is in the process of deflation power generation/inflation energy storage, high-pressure water continuously flows from the high-level reservoir (1) to the gas storage hole (3)/or continuously flows from the gas storage hole (3) to the high-level reservoir (1) through the pressure water conveying pipeline (2), the water level amplitude of the high-level reservoir (1) is in a set change range, so that the gas pressure in the gas storage hole (3) is maintained in the set change range, and the purpose of automatic pressure stabilization is achieved;
The utility model provides a water curtain branch pipeline that gas storage hole (3) hole is provided with booster pump (4) outward, booster pump (4) are used for increasing the pump internal water pressure to set pressure, the water under high pressure in gas storage hole (3) storehouse is connected to booster pump (4) water absorption end, water curtain system (5) are connected to booster pump (4) water outlet end, water curtain system (5) are including setting up water curtain trunk line (5-1) on the outer top of gas storage hole (3), and water curtain trunk line (5-1) extending direction is parallel with gas storage hole (3) extending direction, water curtain trunk line (5-1) both sides communicate respectively have one row of water curtain branch pipeline (5-2) of axial interval arrangement, and every row water curtain branch pipeline (5-2) cover gas storage hole (3) hole top, and every water curtain branch pipeline (5-2) water outlet end intercommunication has water curtain hole (5-3), and every water curtain hole (5-3) extend to gas storage hole (3) bottom outside from gas storage hole (3) hole top outside, make water curtain trunk line (5-3) side inflow into outside water curtain hole (3) and air leakage control purpose outside gas storage hole (3).
2. The automatically regulated water curtain sealed underground gas storage of claim 1, wherein: the pressure water delivery pipeline (2) is provided with a gate (2-2) which is communicated with the ground at a position close to the high-level reservoir (1), and the gate (2-2) is used for emergency braking when the air storage hole (3) is overhauled.
3. The automatically regulated water curtain sealed underground gas storage of claim 2, wherein: the height difference between the high-level reservoir (1) and the gas storage hole (3) is more than 700m, and the storage capacity of the high-level reservoir (1) is more than or equal to 1.5 times of the storage capacity of the gas storage hole (3).
4. The automatically regulated water curtain sealed underground gas storage of claim 3, wherein: in the process of deflation power generation of the gas storage hole (3), high-pressure water continuously flows from the high-level reservoir (1) to the gas storage hole (3), the water level amplitude of the high-level reservoir (1) is within the variation range of 30m, so that the gas pressure in the gas storage hole (3) is maintained within the variation range of 5%, and the purpose of automatic pressure stabilization of the gas storage hole (3) is achieved;
In the process of inflating and storing energy, high-pressure water continuously flows from the air storage hole (3) to the high-level reservoir (1), the water level amplitude of the high-level reservoir (1) is within the variation range of 30m, so that the gas pressure in the air storage hole (3) reservoir is maintained within the variation range of 5%, and the purpose of automatically stabilizing the air storage hole (3) is achieved.
5. The automatically regulated water curtain sealed underground gas storage of claim 4, wherein: the pressure water conveying pipeline (2) adopts a prestressed reinforced concrete lining structure, and the water flow speed in the pipeline is 4-8 m/s.
6. The automatically regulated water curtain sealed underground gas storage of claim 1, wherein: the top outside the gas storage hole (3) is provided with a water curtain chamber (5-4), the booster pump (4) is arranged in the water curtain chamber (5-4), and the water curtain main pipeline (5-1) is arranged in the water curtain chamber (5-4).
7. The automatically regulated water curtain sealed underground gas storage of claim 6, wherein: the booster pump (4) is used for increasing the water pressure in the pump by 0.4-0.6 MPa.
8. The automatically regulated water curtain sealed underground gas storage of claim 7, wherein: the water outlet end of the booster pump (4) is also connected with a drain pipe extending to the ground, and the booster pump (4) is used as an overhaul drain pump.
9. The automatically regulated water curtain sealed underground gas storage of claim 8, wherein: the distance between each row of adjacent water curtain branch pipelines (5-2) is 2-4 m, the distance between each adjacent water curtain holes (5-3) is 2-4 m, and the aperture of each water curtain hole (5-3) is 108mm.
10. The automatically regulated water curtain seal underground gas storage of claim 9, wherein: the water curtain main pipeline (5-1) and the water curtain branch pipeline (5-2) are seamless steel pipes, a thrust ring (5-5) is sleeved on the water curtain branch pipeline (5-2), and concrete is adopted between the thrust ring (5-5) and rock for blocking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410264823.9A CN118293350A (en) | 2024-03-08 | 2024-03-08 | Automatic pressure stabilizing water curtain sealing underground gas storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410264823.9A CN118293350A (en) | 2024-03-08 | 2024-03-08 | Automatic pressure stabilizing water curtain sealing underground gas storage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118293350A true CN118293350A (en) | 2024-07-05 |
Family
ID=91686750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410264823.9A Pending CN118293350A (en) | 2024-03-08 | 2024-03-08 | Automatic pressure stabilizing water curtain sealing underground gas storage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118293350A (en) |
-
2024
- 2024-03-08 CN CN202410264823.9A patent/CN118293350A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108895017B (en) | Multistage constant voltage compressed air energy memory | |
| CN113882900B (en) | Natural water seal compressed air energy storage system for manually excavating underground cavern under lake | |
| CN112065633A (en) | Underground pumped storage system and method with abandoned mine as energy storage container | |
| CN115875079A (en) | Compressed air energy storage artificial underground gas storage | |
| CN115163388A (en) | Pumped storage system using abandoned mine as pumped storage container | |
| CN114562404A (en) | Coal mine pumped storage power generation system and construction method | |
| CN114541346A (en) | System and method for carrying out water pumping and energy storage by combining subsidence area and underground space of coal mine | |
| CN201474361U (en) | Ground self-supporting steel surge tower | |
| CN103423583A (en) | High-pressure gas preservation method | |
| CN201077978Y (en) | Low head movable dam | |
| CN118293350A (en) | Automatic pressure stabilizing water curtain sealing underground gas storage | |
| CN116025418B (en) | Low-pressure type abandoned mine compressed air energy storage method | |
| CN108979280B (en) | Close hole Mine Roadway storage tank farm, oil storage method and construction method | |
| CN117469575A (en) | Carbon dioxide energy storage system based on underground space and construction method thereof | |
| CN207619949U (en) | Diversion system for Power Tunnels | |
| CN114542946B (en) | Method for generating power by utilizing pressurized water energy storage of underground space | |
| CN114961856A (en) | Method for water-sealing air-compressing energy storage by using abandoned flooded coal mine | |
| CN114718796A (en) | System and method for pumping water and storing energy by using coal mine engineering and underground space exiting from well | |
| CN202417800U (en) | Upper liquid storage system of liquid gravitational potential energy storage power station | |
| CN212003288U (en) | Power generation system capable of maintaining constant pressure based on high-density medium | |
| CN111442190B (en) | Method for storing energy by using tunnel | |
| CN219431959U (en) | System for utilizing coal mine engineering to construct underground vertical shaft space for pumped storage | |
| CN111502893A (en) | Power generation system for maintaining constant pressure by using high-density medium | |
| CN219976115U (en) | Drainage structure, underground gas storage system and compressed air energy storage system | |
| CN219710198U (en) | Arrangement structure for eliminating underground water jacking load of full-reservoir basin seepage-proofing structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication |