CN117366454A - Low-pressure gas storage pressure stabilizing device and compressed carbon dioxide energy storage system - Google Patents
Low-pressure gas storage pressure stabilizing device and compressed carbon dioxide energy storage system Download PDFInfo
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- CN117366454A CN117366454A CN202311313364.0A CN202311313364A CN117366454A CN 117366454 A CN117366454 A CN 117366454A CN 202311313364 A CN202311313364 A CN 202311313364A CN 117366454 A CN117366454 A CN 117366454A
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 118
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 59
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 59
- 238000004146 energy storage Methods 0.000 title claims abstract description 53
- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 35
- 230000001105 regulatory effect Effects 0.000 claims abstract description 58
- 230000008859 change Effects 0.000 claims abstract description 14
- 230000001276 controlling effect Effects 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 238000010248 power generation Methods 0.000 claims description 9
- 238000005338 heat storage Methods 0.000 claims description 6
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 238000009825 accumulation Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 5
- 230000005489 elastic deformation Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/013—Carbone dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/043—Pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/0439—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0486—Indicating or measuring characterised by the location
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/06—Controlling or regulating of parameters as output values
- F17C2250/0605—Parameters
- F17C2250/0626—Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/06—Controlling or regulating of parameters as output values
- F17C2250/0605—Parameters
- F17C2250/0631—Temperature
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to the technical field of physical energy storage, and provides a low-pressure gas storage and pressure stabilizing device and a compressed carbon dioxide energy storage system, wherein the low-pressure gas storage and pressure stabilizing device comprises a gas storage tank, an elastic gas bag and a gas pressure regulating module, and the gas storage tank is provided with a gas inlet and a gas outlet; the elastic air bag is provided with an air pressure regulating inlet and an air pressure regulating outlet, and is arranged in the air storage tank so as to divide the inner cavity of the air storage tank into a balance cavity and an air storage cavity which are mutually independent, the air inlet and the air outlet are communicated with the air storage cavity, and the air pressure regulating inlet and the air pressure regulating outlet are communicated with the balance cavity; the air pressure adjusting module is communicated with the air pressure adjusting inlet and the air pressure adjusting outlet, and is used for controlling the volume change of the balance cavity through the air pressure adjusting inlet and the air pressure adjusting outlet. The carbon dioxide energy storage system sliding pressure operation method and device can overcome the defect of the carbon dioxide energy storage system sliding pressure operation in the prior art, meanwhile, the unit can realize dynamic balance under the variable working condition, and the operation stability of the system is ensured.
Description
Technical Field
The invention relates to the technical field of physical energy storage, in particular to a low-pressure gas storage and pressure stabilizing device and a compressed carbon dioxide energy storage system.
Background
The compressed carbon dioxide energy storage means an energy storage mode that abundant electric power or electric power with severe fluctuation such as wind power, solar energy and the like on an electric network in a low electricity consumption period are used for compressing carbon dioxide, the compressed high-pressure carbon dioxide is liquefied and stored in a gas storage device, and when the compressed high-pressure carbon dioxide is needed, liquid carbon dioxide is released to gasify, and an air turbine is driven to drive a generator to generate electricity.
When the existing compressed carbon dioxide energy storage system is designed, the carbon dioxide storage device is generally of a fixed-volume type, and according to a gas state equation, in the deflation process of the fixed-volume type pressure vessel, the gas pressure in the pressure vessel is continuously reduced along with the deflation process due to the reduction of the gas quantity. Because the fixed-volume compressed air storage device has the phenomenon that the pressure is continuously reduced in the air discharging process, the sliding pressure operation phenomenon can occur to a certain extent when the carbon dioxide compressor works under the condition that the low pressure side has a certain pressure.
Disclosure of Invention
The invention provides a low-pressure gas storage pressure stabilizing device and a compressed carbon dioxide energy storage system, which are used for solving the defect that the carbon dioxide energy storage system in the prior art can generate sliding pressure when in operation, overcoming the defect of the sliding pressure operation of the carbon dioxide energy storage system in the prior art, simultaneously enabling a unit to realize dynamic balance under variable working conditions and ensuring the stable operation of the system.
The invention provides a low-pressure gas storage pressure stabilizing device, which comprises:
the gas storage tank is provided with a gas inlet and a gas outlet;
the elastic air bag is provided with an air pressure adjusting inlet and an air pressure adjusting outlet, and is arranged in the air storage tank to divide the inner cavity of the air storage tank into a balance cavity and an air storage cavity which are mutually independent, the air inlet and the air outlet are communicated with the air storage cavity, and the air pressure adjusting inlet and the air pressure adjusting outlet are communicated with the balance cavity; and
the air pressure adjusting module is communicated with the air pressure adjusting inlet and the air pressure adjusting outlet, and is used for controlling the volume change of the balance cavity through the air pressure adjusting inlet and the air pressure adjusting outlet.
According to the low-pressure gas storage pressure stabilizing device provided by the invention, the gas storage tank and the elastic gas bag are coaxially arranged, the gas storage tank is provided with the gas inlet interface and the gas outlet interface along two ends which are oppositely arranged on the axis of the gas storage tank, and the gas pressure regulating inlet and the gas pressure regulating outlet are respectively communicated with the outside of the gas storage tank through the gas inlet interface and the gas outlet interface.
According to the low-pressure air storage pressure stabilizing device provided by the invention, the air pressure adjusting module comprises an air inlet adjusting component and an air outlet adjusting component, the air inlet adjusting component is communicated with the air pressure adjusting inlet, and the air inlet adjusting component is used for controlling the air flow of the air pressure adjusting inlet according to the air pressure change of the air outlet; the air outlet adjusting component is communicated with the air pressure adjusting outlet, and the air outlet adjusting component is used for controlling the air flow of the air pressure adjusting outlet according to the air pressure change of the air inlet.
According to the low-pressure air storage pressure stabilizing device provided by the invention, the air inlet adjusting component comprises the one-way valve and the air compressor, the air compressor is connected with the air pressure adjusting inlet through the one-way valve, and the air compressor is used for providing compressed air for the balance cavity.
According to the low-pressure gas storage pressure stabilizing device provided by the invention, the low-pressure gas storage pressure stabilizing device further comprises a buffer tank, and the buffer tank is communicated with the gas pressure regulating inlet and the gas pressure regulating outlet.
According to the low-pressure gas storage pressure stabilizing device provided by the invention, the gas outlet adjusting component comprises an electric adjusting valve, and the electric adjusting valve is used for adjusting the opening of the gas pressure adjusting outlet.
According to the low-pressure gas storage pressure stabilizing device provided by the invention, the gas storage tank comprises an outer shell and an inner shell, the inner shell is arranged on the inner side of the outer shell, an insulating layer is arranged between the outer shell and the inner shell at intervals, and the elastic air bag is arranged in the inner shell.
According to the low-pressure gas storage pressure stabilizing device provided by the invention, the low-pressure gas storage pressure stabilizing device further comprises a flange connection assembly, the gas pressure regulating inlet and the gas pressure regulating outlet are in butt joint with the gas inlet interface and the gas outlet interface through the flange connection assembly, the flange connection assembly comprises a first fixed flange cover, a connecting slipknot and a second fixed flange cover, the first fixed flange cover is arranged in the elastic air bag and is correspondingly arranged with the gas pressure regulating inlet and the gas pressure regulating outlet, the second fixed flange cover is connected with a gas inlet pipeline or a gas outlet pipeline, and the connecting slipknot is connected between the first fixed flange cover and the second fixed flange cover.
According to the low-pressure gas storage pressure stabilizing device provided by the invention, the low-pressure gas storage pressure stabilizing device further comprises a first temperature pressure gauge and a second temperature pressure gauge, wherein the first temperature pressure gauge is arranged on the gas storage tank and is used for detecting the temperature and the pressure of the gas storage cavity, the second temperature pressure gauge is connected with the buffer tank and is used for detecting the temperature and the pressure of the balance cavity.
The invention also provides a compressed carbon dioxide energy storage system, which comprises the low-pressure gas storage and stabilization device, a liquid carbon dioxide storage tank, an energy storage unit, a power generation unit, a heat storage unit and a cold storage unit, wherein the low-pressure gas storage and stabilization device comprises a gas storage tank, an elastic gas bag and a gas pressure regulating component, and the gas storage tank is provided with a gas inlet and a gas outlet; the elastic air bag is provided with an air pressure adjusting inlet and an air pressure adjusting outlet, the elastic air bag is arranged in the air storage tank to divide the inner cavity of the air storage tank into a balance cavity and an air storage cavity which are mutually independent, the air inlet and the air outlet are communicated with the air storage cavity, and the air pressure adjusting inlet and the air pressure adjusting outlet are communicated with the balance cavity; the air pressure adjusting module is communicated with the air pressure adjusting inlet and the air pressure adjusting outlet, and is used for controlling the volume change of the balance cavity through the air pressure adjusting inlet and the air pressure adjusting outlet. The air storage tank and the liquid carbon dioxide storage tank are connected through an energy storage pipeline and an energy release pipeline to form a closed circulation loop; the energy storage unit is arranged in the energy storage pipeline and is used for compressing and storing the carbon dioxide in the energy storage pipeline and then leading the compressed and stored carbon dioxide to the liquid carbon dioxide storage tank; the power generation unit is arranged in the energy release pipeline and is used for generating power by energy released by carbon dioxide in the energy release pipeline; the heat storage unit is connected with the energy storage pipeline and the energy release pipeline, and is used for storing heat generated by the energy storage unit and acting on the energy release pipeline; the cold accumulation unit is connected to the energy storage pipeline and the energy release pipeline, and is used for storing the cold energy generated by the power generation unit and acting on the energy storage pipeline.
According to the low-pressure air storage pressure stabilizing device, the elastic air bag is arranged in the air storage tank, and then the elastic air bag is facilitated to divide the inner cavity of the air storage tank into the balance cavity and the air storage cavity which are mutually independent, the air inlet and the air outlet are both communicated with the air storage cavity, and the air pressure regulating inlet and the air pressure regulating outlet are both communicated with the balance cavity; when the air outlet is in air outlet, the carbon dioxide gas amount in the air storage cavity is reduced, and at the moment, the air pressure adjusting module controls the air pressure adjusting inlet to be opened so as to convey air into the balance cavity to increase the volume of the balance cavity, so that the elastic air bag compresses the volume of the air storage cavity through elastic deformation, and the pressure intensity of the air storage cavity is ensured; when the air inlet is in air intake, the carbon dioxide gas quantity in the air storage cavity is gradually increased, the air pressure adjusting module is used for controlling the air pressure adjusting outlet to be opened, the air is discharged from the balance cavity, the air pressure of the balance cavity is reduced, the elastic air bag is used for compressing the balance cavity through elastic deformation, the pressure of the air storage cavity is maintained to be stable, so that the air storage cavity is in a dynamic pressure-stabilizing state, the generation of sliding pressure operation of the carbon dioxide energy storage system is prevented, the stability of the machine set under the variable working condition is realized, and the operation stability of the system is ensured.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a graph of the connection of a compressed carbon dioxide energy storage system provided by the present invention;
fig. 2 is an enlarged view of a portion of the air pressure regulating inlet of the low pressure air storage stabilizer of fig. 1.
Reference numerals:
100. a low-pressure gas storage pressure stabilizing device;
110. a gas storage tank; 111. an air inlet; 112. an air outlet; 113. an air inlet interface; 114. an air outlet interface; 115. a gas storage chamber; 116. an outer housing; 117. an inner housing; 118. a heat preservation layer;
120. an elastic air bag; 121. a balancing cavity; 122. an air pressure regulating inlet; 123. an air pressure regulating outlet;
130. an intake air adjusting assembly; 131. a one-way valve; 132. an air compressor;
140. an air outlet adjusting component; 141. an electric control valve;
150. a buffer tank;
160. a flange connection assembly; 161. a first fixed flange cover; 162. connecting a slipknot; 163. a second fixed flange cover;
170. a first temperature pressure gauge;
180. a second temperature pressure gauge;
10. a compressed carbon dioxide energy storage system;
200. a liquid carbon dioxide storage tank; 300. an energy storage pipeline; 400. an energy release pipeline; 500. a compressor; 600. an expander; 700. a heat accumulator; 800. a regenerator.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
The invention provides a low-pressure gas storage pressure stabilizing device and a compressed carbon dioxide energy storage system.
In the embodiment of the invention, referring to fig. 1 to 2, the low-pressure gas storage and stabilization device 100 includes a gas storage tank 110, an elastic gas bag 120, and a gas pressure adjusting module, the gas storage tank 110 having a gas inlet 111 and a gas outlet 112; the elastic air bag 120 is provided with an air pressure regulating inlet 122 and an air pressure regulating outlet 123, the elastic air bag 120 is arranged in the air storage tank 110 to divide the inner cavity of the air storage tank 110 into a balance cavity 121 and an air storage cavity 115 which are mutually independent, the air inlet 111 and the air outlet 112 are communicated with the air storage cavity 115, and the air pressure regulating inlet 122 and the air pressure regulating outlet 123 are communicated with the balance cavity 121; the air pressure adjusting module is communicated with the air pressure adjusting inlet 122 and the air pressure adjusting outlet 123, and the air pressure adjusting module is used for controlling the volume change of the balance cavity 121 through the air pressure adjusting inlet 122 and the air pressure adjusting outlet 123.
Specifically, in the embodiment of the present invention, the low-pressure gas storage and stabilization device 100 includes a gas storage tank 110, an elastic gas bag 120 and a gas pressure adjusting module, where the gas storage tank 110 is a container for storing carbon dioxide gas, and has a gas inlet 111 and a gas outlet 112 to allow gas to enter and exit, and different materials (such as steel or plastic) and capacities of the gas storage tank 110 can be selected to adapt to different application requirements. The flexible material is adopted as the elastic air bag 120, so that the elastic air bag 120 has certain characteristics of pressure bearing, tearing resistance and low leakage rate, and the elastic air bag 120 is an inflatable and deflatable film or bag-shaped structure. The elastic balloon 120 has an air pressure adjustment inlet 122 and an air pressure adjustment outlet 123 for allowing adjustment of air pressure. When the elastic air bag 120 is inflated, the elastic air bag 120 occupies a part of the space of the air storage tank 110 to divide the inner cavity of the air storage tank 110 into two independent balance cavities 121 and air storage cavities 115, wherein the balance cavities 121 are mainly used for adjusting air pressure, and the air storage cavities 115 are used for storing carbon dioxide. The elastic bladder 120 may be replaced with other types of chamber structures, such as a piston or a diaphragm, to perform the functions of dividing the interior chamber of the air reservoir 110 and controlling pressure. The air pressure adjusting module is used for controlling the air pressure adjusting inlet 122 and the air pressure adjusting outlet 123, so as to control the volume change of the balance cavity 121, specifically, the volume of the balance cavity 121 can be increased or decreased, and the air pressure adjusting module can be controlled according to the air pressure change of the air storage cavity. The volume of the balance cavity 121 can be controlled automatically or manually through the air pressure adjusting inlet 122 and the air pressure adjusting outlet 123, so as to achieve the purpose of stabilizing the air pressure of the air storage cavity 115.
According to the low-pressure gas storage pressure stabilizing device 100 provided by the invention, the elastic gas bag 120 is arranged in the gas storage tank 110, and then the elastic gas bag 120 is beneficial to divide the inner cavity of the gas storage tank 110 into the balance cavity 121 and the gas storage cavity 115 which are mutually independent, the gas inlet 111 and the gas outlet 112 are both communicated with the gas storage cavity 115, and the gas pressure regulating inlet 122 and the gas pressure regulating outlet 123 are both communicated with the balance cavity 121; when the air outlet 112 is in the air outlet state, the carbon dioxide gas amount in the air storage cavity 115 is reduced, and at the moment, the air pressure adjusting module controls the air pressure adjusting inlet 122 to be opened so as to convey air into the balance cavity 121 to increase the volume of the balance cavity 121, so that the elastic air bag 120 compresses the volume of the air storage cavity 115 through elastic deformation to ensure the pressure of the air storage cavity 115; when the air inlet 111 is in the air intake, the carbon dioxide gas volume in the gas storage cavity 115 gradually increases, and at this time, the air pressure adjusting module controls the air pressure adjusting outlet 123 to be opened, so that the air is discharged from the balance cavity 121, the air pressure in the balance cavity 121 is reduced, the elastic air bag 120 compresses the balance cavity 121 through elastic deformation, and the pressure of the gas storage cavity 115 is maintained to be stable, so that the gas storage cavity 115 is in a dynamic pressure-stabilizing state, the generation of the sliding pressure operation of the carbon dioxide energy storage system is prevented, the stability of the unit under the variable working condition is realized, and the operation stability of the system is ensured.
Referring to fig. 1, in an embodiment, the air tank 110 is coaxially disposed with the elastic air bag 120, two ends of the air tank 110 disposed along the axis thereof are provided with an air inlet port 113 and an air outlet port 114, and the air pressure regulating inlet 122 and the air pressure regulating outlet 123 are respectively communicated with the outside of the air tank 110 through the air inlet port 113 and the air outlet port 114. It can be appreciated that in this embodiment, the two ends on the axis are disposed on the path of the gas flow, so that the inflation and deflation of the air bag are separated, mutual interference is avoided, and convenience and accuracy of air pressure adjustment are improved. Meanwhile, the air inlet port 113 and the air outlet port 114 can be arranged to facilitate the connection between the elastic air bag 120 and the air storage tank 110.
Referring to fig. 1, in one embodiment, the air pressure adjusting module includes an air inlet adjusting assembly 130 and an air outlet adjusting assembly 140, the air inlet adjusting assembly 130 is in communication with the air pressure adjusting inlet 122, and the air inlet adjusting assembly 130 is configured to control the air flow of the air pressure adjusting inlet 122 according to the air pressure variation of the air outlet 112; the air outlet adjusting component 140 is in communication with the air pressure adjusting outlet 123, and the air outlet adjusting component 140 is configured to control the air flow of the air pressure adjusting outlet 123 according to the air pressure variation of the air inlet 111. In this embodiment, the air flow of the air pressure regulating inlet 122 and the air flow of the air pressure regulating outlet 123 are respectively controlled by the air inlet regulating assembly 130 and the air outlet regulating assembly 140, so as to control the volume change of the balance cavity 121, and further control the duty ratio change of the balance cavity 121 and the air storage cavity 115 in the air storage tank 110, so as to regulate the air pressure of the air storage cavity 115. When the air pressure at the air outlet 112 is high, the air intake adjusting assembly 130 reduces the air flow at the air pressure adjusting inlet 122, thereby limiting the air intake amount and achieving the purpose of reducing the air pressure. Conversely, when the air pressure at the air inlet 111 is high, the air outlet adjusting component 140 reduces the air flow at the air pressure adjusting outlet 123, so as to limit the air outlet, thereby achieving the purpose of increasing the air pressure.
Referring to fig. 1, in an embodiment, the intake air adjusting assembly 130 includes a check valve 131 and an air compressor 132, the air compressor 132 is connected to the air pressure adjusting inlet 122 through the check valve 131, and the air compressor 132 is used to supply compressed air to the balance chamber 121. It is understood that the air intake adjusting assembly 130 may employ an air compressor 132 or a blower according to the carbon dioxide gas pressure required by the system, and other embodiments may be implemented with reference to the present embodiment by taking the air compressor 132 as an example. The one-way valve 131 is disposed between the air compressor 132 and the air pressure adjusting inlet 122, and is used for allowing air flow to pass through in one direction, and the air compressor 132 is used for compressing external air or carbon dioxide and the like and then blowing the compressed air into the balance cavity 121, wherein the air compressor 132 can adjust the compression rate of the air according to the change of the air pressure of the air outlet 112, so that the air pressure of the air storage cavity 115 is balanced.
Referring to fig. 1, in one embodiment, the low pressure storage regulator 100 further includes a buffer tank 150, the buffer tank 150 being in communication with the barometric pressure adjustment inlet 122 and the barometric pressure adjustment outlet 123. It will be appreciated that this embodiment shares the effect of balancing gas pressure with the balancing chamber 121 by providing a buffer tank 150. When the air pressure of the air pressure regulating inlet 122 is high, excess air may enter the buffer tank 150, thereby reducing the pressure of the air pressure regulating system. Conversely, when the air pressure at the air pressure regulating outlet 123 is low, the air in the buffer tank 150 flows to the outlet, increasing the pressure of the air pressure regulating system. In this manner, the buffer tank 150 may help balance the gas pressure, enabling the gas pressure regulating system to operate more stably.
Referring to fig. 1, in an embodiment, the outlet air adjusting assembly 140 includes an electric adjusting valve 141, and the electric adjusting valve 141 is used to adjust the opening of the air pressure adjusting outlet 123. It is understood that by adjusting the opening degree of the electric adjusting valve 141, the amount of gas flowing out from the gas pressure adjusting outlet 123 can be precisely controlled, thereby achieving adjustment of the gas pressure. The electric regulating valve 141 has the characteristics of quick response and accurate control, and can regulate the pressure of the air pressure regulating outlet 123 in real time according to the system requirements.
Referring to fig. 1 and 2, in one embodiment, the air tank 110 includes an outer casing 116 and an inner casing 117, the inner casing 117 is disposed inside the outer casing 116, an insulation layer 118 is disposed between the outer casing 116 and the inner casing 117, and an elastic air bag 120 is disposed in the inner casing 117. It will be appreciated that the outer housing 116 is the outer structure of the air reservoir 110 for enclosing the internal components and providing protection. The inner housing 117 is located inside the outer housing 116 and serves as a container for the internal gas. An insulating layer 118 is provided between the inner housing 117 and the outer housing 116 to isolate the influence of the external ambient temperature on the gas inside the gas tank 110 and reduce heat transfer. The insulating layer 118 may be made of a heat insulating material such as polystyrene board, etc. to provide good heat insulating effect.
Referring to fig. 1 and 2, in an embodiment, the low-pressure gas storage pressure stabilizing device 100 further includes a flange connection assembly 160, the gas pressure regulating inlet 122 and the gas pressure regulating outlet 123 are in butt joint with the gas inlet 113 and the gas outlet 114 through the flange connection assembly 160, the flange connection assembly 160 includes a first fixed flange cover 161, a connecting slip knot 162 and a second fixed flange cover 163, the first fixed flange cover 161 is disposed in the elastic airbag 120 and is disposed corresponding to the gas pressure regulating inlet 122 and the gas pressure regulating outlet 123, the second fixed flange cover 163 is connected with the gas inlet pipe or the gas outlet pipe, and the connecting slip knot 162 is connected between the first fixed flange cover 161 and the second fixed flange cover 163. It is understood that the first fixing flange cover 161 is located inside the elastic bladder 120 and is disposed corresponding to the air pressure adjusting inlet 122 and the air pressure adjusting outlet 123. So as to play a role in fixing and sealing and ensure the stability of connection. The second fixing flange cover 163 is connected to the gas inlet pipe or the gas outlet pipe for introducing or discharging gas into or from the gas storage system. The connecting slipknot 162 is a short pipe, the two sides of the connecting slipknot are connected by flanges, the connecting slipknot 162 is connected with the elastic air bag 120 before the elastic air bag 120 is arranged on the air storage tank 110, and the connecting slipknot 162 has the function of easy installation and disassembly.
Referring to fig. 1, in an embodiment, the low-pressure gas storage pressure stabilizing device 100 further includes a first temperature pressure gauge 170 and a second temperature pressure gauge 180, the first temperature pressure gauge 170 is disposed on the gas storage tank 110, the first temperature pressure gauge 170 is used for detecting the temperature and the pressure of the gas storage cavity 115, the second temperature pressure gauge 180 is connected with the buffer tank 150, and the second temperature pressure gauge 180 is used for detecting the temperature and the pressure of the balance cavity 121. It will be appreciated that a first temperature and pressure gauge 170 is provided on the air reservoir 110 for sensing the temperature and pressure of the air reservoir 115. To provide real-time information about the gas conditions inside the gas storage chamber 115, by monitoring the temperature and pressure of the gas storage chamber 115, the volume of the balancing chamber 121 is controlled to achieve dynamic balancing of the gas pressure of the gas storage chamber 115 during gas outlet or inlet. The second temperature and pressure gauge 180 is connected to the connection line between the buffer tank 150 and the air pressure adjusting inlet 122 and the air pressure adjusting outlet 123, and is used for detecting the temperature and pressure of the balance chamber 121. The balancing chamber 121 is typically used to balance the pressure stabilization of the reservoir 115 to enhance the stability of the system. The second temperature and pressure gauge 180 can provide status information of the gas in the balance cavity 121, so as to adjust the air outlet or the air flow in time through the air pressure adjusting module, so as to control the pressure stability of the air storage cavity 115. In this way, by setting the first temperature pressure gauge 170 and the second temperature pressure gauge 180, the temperature and pressure of the air storage chamber 115 and the balance chamber 121 can be effectively monitored, and real-time working state information is provided to support the safe control and operation of the system.
The invention also provides a compressed carbon dioxide energy storage system 10, the compressed carbon dioxide energy storage system 10 comprises a low-pressure gas storage and voltage stabilizing device 100, and the specific structure of the low-pressure gas storage and voltage stabilizing device 100 refers to the above embodiment.
Specifically, the compressed carbon dioxide energy storage system 10 further includes a liquid carbon dioxide storage tank 200, an energy storage unit, a power generation unit, a heat storage unit, a cold storage unit, and the like, where the gas storage tank 110 and the liquid carbon dioxide storage tank 200 are connected through an energy storage pipeline 300 and an energy release pipeline 400 to form a closed circulation loop; the energy storage unit is arranged in the energy storage pipeline 300 and is used for compressing and storing the carbon dioxide in the energy storage pipeline 300 and leading the compressed and stored carbon dioxide to the liquid carbon dioxide storage tank 200; the power generation unit is arranged in the energy release pipeline 400 and is used for generating power by energy released by carbon dioxide in the energy release pipeline 400; the heat storage unit is connected with the energy storage pipeline 300 and the energy release pipeline 400, and is used for storing heat generated by the energy storage unit and acting on the energy release pipeline 400; the cold accumulation unit is connected to the energy storage pipeline 300 and the energy release pipeline 400, and is used for storing the cold energy generated by the power generation unit and acting on the energy storage pipeline 300. The energy storage unit comprises a compressor 500, the power generation unit comprises an expander 600, the heat storage unit comprises a cold storage tank, the cold storage unit comprises a cold storage tank, the air inlet 111 is connected with the expander 600 through an energy release pipeline 400, and the air outlet 112 is connected with the compressor 500 through an energy storage pipeline 300.
And (3) charging: the low-pressure carbon dioxide in the low-pressure gas storage container enters the compressor 500, the carbon dioxide gas amount in the gas storage cavity 115 is reduced, at the moment, the one-way valve 131 is opened, the air compressor 132 is started, air enters the balance cavity 121 of the elastic air bag 120 through the air compressor 132, and then feedback control is performed between the second temperature pressure gauge 180 and the air compressor 132, so that the pressure of the carbon dioxide in the gas storage cavity 115 is ensured to be constant, and the charging process is finished.
The discharging process comprises the following steps: the low-pressure carbon dioxide enters the gas storage cavity 115 from the outlet of the expander 600, the gas amount in the gas storage cavity 115 is continuously increased, and at the moment, the opening of the electric regulating valve 141 is regulated to regulate the air pressure in the balance cavity 121, so that the pressure of the carbon dioxide in the gas storage cavity 115 is maintained stable.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A low pressure gas storage pressure stabilizing device, comprising:
the gas storage tank is provided with a gas inlet and a gas outlet;
the elastic air bag is provided with an air pressure adjusting inlet and an air pressure adjusting outlet, and is arranged in the air storage tank to divide the inner cavity of the air storage tank into a balance cavity and an air storage cavity which are mutually independent, the air inlet and the air outlet are communicated with the air storage cavity, and the air pressure adjusting inlet and the air pressure adjusting outlet are communicated with the balance cavity; and
the air pressure adjusting module is communicated with the air pressure adjusting inlet and the air pressure adjusting outlet, and is used for controlling the volume change of the balance cavity through the air pressure adjusting inlet and the air pressure adjusting outlet.
2. The low-pressure gas storage and pressure stabilizing device according to claim 1, wherein the gas storage tank and the elastic gas bag are coaxially arranged, two ends of the gas storage tank, which are arranged on the axis of the gas storage tank in an opposite mode, are provided with a gas inlet interface and a gas outlet interface, and the gas pressure regulating inlet and the gas pressure regulating outlet are respectively communicated with the outside of the gas storage tank through the gas inlet interface and the gas outlet interface.
3. The low-pressure air storage pressure stabilizing device according to claim 2, wherein the air pressure adjusting module comprises an air inlet adjusting component and an air outlet adjusting component, the air inlet adjusting component is communicated with the air pressure adjusting inlet, and the air inlet adjusting component is used for controlling the air flow of the air pressure adjusting inlet according to the air pressure change of the air outlet; the air outlet adjusting component is communicated with the air pressure adjusting outlet, and the air outlet adjusting component is used for controlling the air flow of the air pressure adjusting outlet according to the air pressure change of the air inlet.
4. A low pressure air storage pressure stabilizing device as claimed in claim 3, wherein the air intake regulating assembly includes a one-way valve and an air compressor, the air compressor being connected to the air pressure regulating inlet via the one-way valve, the air compressor being adapted to provide compressed air to the balancing chamber.
5. The low pressure reservoir pressure regulator of claim 4, further comprising a buffer tank in communication with the pressure regulating inlet and the pressure regulating outlet.
6. A low pressure gas storage pressure stabilizing device as claimed in claim 3, wherein said gas outlet regulating assembly comprises an electric regulating valve for regulating the opening of said gas pressure regulating outlet.
7. The low-pressure gas storage and pressure stabilizing device according to any one of claims 1 to 6, wherein the gas storage tank comprises an outer shell and an inner shell, the inner shell is arranged on the inner side of the outer shell, a heat insulation layer is arranged between the outer shell and the inner shell at intervals, and the elastic gas bag is arranged in the inner shell.
8. The low pressure gas storage pressure stabilizing device according to claim 2, further comprising a flange connection assembly, wherein the gas pressure regulating inlet and the gas pressure regulating outlet are in butt joint with the gas inlet interface and the gas outlet interface through the flange connection assembly, the flange connection assembly comprises a first fixed flange cover, a connecting slipknot and a second fixed flange cover, the first fixed flange cover is arranged in the elastic gas bag and is correspondingly arranged with the gas pressure regulating inlet and the gas pressure regulating outlet, the second fixed flange cover is connected with a gas inlet pipeline or a gas outlet pipeline, and the connecting slipknot is connected between the first fixed flange cover and the second fixed flange cover.
9. The low pressure gas storage and pressure stabilizing device according to claim 5, further comprising a first temperature pressure gauge and a second temperature pressure gauge, wherein the first temperature pressure gauge is arranged on the gas storage tank, the first temperature pressure gauge is used for detecting the temperature and the pressure of the gas storage cavity, the second temperature pressure gauge is connected with the buffer tank, and the second temperature pressure gauge is used for detecting the temperature and the pressure of the balance cavity.
10. A compressed carbon dioxide energy storage system comprising a low pressure gas storage and stabilization device according to any one of claims 1 to 9; and
the liquid carbon dioxide storage tank is connected with the liquid carbon dioxide storage tank through an energy storage pipeline and an energy release pipeline to form a closed circulation loop;
the energy storage unit is arranged in the energy storage pipeline and is used for compressing and storing the carbon dioxide in the energy storage pipeline and then leading the compressed carbon dioxide to the liquid carbon dioxide storage tank;
the power generation unit is arranged in the energy release pipeline and is used for generating power by energy released by carbon dioxide in the energy release pipeline;
the heat storage unit is connected with the energy storage pipeline and the energy release pipeline, and is used for storing heat generated by the energy storage unit and acting on the energy release pipeline;
the cold accumulation unit is connected to the energy storage pipeline and the energy release pipeline, and is used for storing the cold energy generated by the power generation unit and acting on the energy storage pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311313364.0A CN117366454A (en) | 2023-10-11 | 2023-10-11 | Low-pressure gas storage pressure stabilizing device and compressed carbon dioxide energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311313364.0A CN117366454A (en) | 2023-10-11 | 2023-10-11 | Low-pressure gas storage pressure stabilizing device and compressed carbon dioxide energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117366454A true CN117366454A (en) | 2024-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311313364.0A Pending CN117366454A (en) | 2023-10-11 | 2023-10-11 | Low-pressure gas storage pressure stabilizing device and compressed carbon dioxide energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117366454A (en) |
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2023
- 2023-10-11 CN CN202311313364.0A patent/CN117366454A/en active Pending
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