CN115539161A - Carbon dioxide energy storage system - Google Patents
Carbon dioxide energy storage system Download PDFInfo
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- CN115539161A CN115539161A CN202211226744.6A CN202211226744A CN115539161A CN 115539161 A CN115539161 A CN 115539161A CN 202211226744 A CN202211226744 A CN 202211226744A CN 115539161 A CN115539161 A CN 115539161A
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- carbon dioxide
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 448
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 224
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 224
- 238000004146 energy storage Methods 0.000 title claims abstract description 79
- 238000000605 extraction Methods 0.000 claims abstract description 38
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- 238000003541 multi-stage reaction Methods 0.000 claims abstract description 29
- 238000011282 treatment Methods 0.000 claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 18
- 239000000126 substance Substances 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 239000007789 gas Substances 0.000 claims description 27
- 238000010248 power generation Methods 0.000 claims description 27
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 24
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 22
- 238000005338 heat storage Methods 0.000 claims description 16
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 15
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 12
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 11
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 9
- 239000000292 calcium oxide Substances 0.000 claims description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 6
- 239000002918 waste heat Substances 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 239000003570 air Substances 0.000 description 45
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 238000005286 illumination Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/006—Systems for storing electric energy in the form of pneumatic energy, e.g. compressed air energy storage [CAES]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
- H02S10/12—Hybrid wind-PV energy systems
Abstract
The invention discloses a carbon dioxide energy storage system, which comprises carbon dioxide energy storage equipment and carbon dioxide extraction equipment; the carbon dioxide extraction equipment comprises an air multistage reaction processing module and a carbon dioxide output module; the air multistage reaction processing module is used for sequentially carrying out multistage reaction processing on input air so as to extract carbon dioxide and output the carbon dioxide to the carbon dioxide output module; wherein different reaction treatments of the multi-stage reaction treatment correspond to different chemical treatment processes; the carbon dioxide output module is used for outputting carbon dioxide to an air inlet of the carbon dioxide energy storage device; the carbon dioxide energy storage device is used for low-pressure storage and/or high-pressure storage of input carbon dioxide. According to the invention, carbon dioxide is used as an energy storage medium, and a carbon dioxide extraction device is additionally arranged, so that the stable supply of the energy storage medium in the energy storage system is ensured, the traditional power consumption is reduced by using the combined drive of wind energy and solar energy, and the comprehensive utilization rate of renewable energy is improved.
Description
Technical Field
The invention relates to the technical field of gas energy storage, in particular to a carbon dioxide energy storage system.
Background
Renewable energy sources mainly represented by solar energy and wind energy are rapidly increased in the global scope, new vitality is injected into the global energy industry, and the whole energy industry is diversified. But due to the intermittency and instability of renewable energy sources, serious challenges are brought to the integration of the renewable energy sources. In order to solve the grid connection problem of wind energy and solar energy, an energy storage technology is developed. During low power periods, renewable energy is stored by the energy storage device. In the peak period of power utilization, the stored energy is converted into electric energy to be output externally, and the peak clipping and valley filling functions can be well exerted.
The compressed air energy storage technology has the advantages of high efficiency, low cost, large capacity, small influence on the environment and the like, and becomes one of the large-scale energy storage technologies with the most development prospect at present. However, the conventional compressed air energy storage system uses air as an energy storage medium, and has the problems of low energy utilization rate and the like.
Disclosure of Invention
The invention aims to overcome the defects of low energy utilization rate and the like of an air energy storage system in the prior art, and provides a carbon dioxide energy storage system.
The invention solves the technical problems through the following technical scheme:
the invention provides a carbon dioxide energy storage system, which comprises carbon dioxide energy storage equipment and carbon dioxide extraction equipment;
the carbon dioxide extraction equipment comprises an air multistage reaction treatment module and a carbon dioxide output module;
the air multistage reaction processing module is used for sequentially carrying out multistage reaction processing on input air so as to extract carbon dioxide and output the carbon dioxide to the carbon dioxide output module;
wherein different reaction treatments of the multi-stage reaction treatment correspond to different chemical treatment processes;
the carbon dioxide output module is used for outputting the carbon dioxide to an air inlet of the carbon dioxide energy storage device;
the carbon dioxide energy storage device is used for low-pressure storage and/or high-pressure storage of the input carbon dioxide.
Preferably, the air multistage reaction treatment module comprises an air contact unit, a reaction unit and a carbon dioxide generation unit;
the air contact unit is used for filtering input air to obtain air with the carbon dioxide content smaller than a set threshold value and discharging the air;
the air contact unit is used for processing carbon dioxide in input air based on a sodium hydroxide solution reaction tank to obtain a sodium carbonate solution and outputting the sodium carbonate solution to the reaction unit;
the reaction unit is used for processing the input sodium carbonate solution to obtain calcium carbonate and the sodium hydroxide solution based on a contained calcium hydroxide solution reaction tank;
the reaction unit is used for outputting the calcium carbonate to the carbon dioxide generation unit, and outputting the sodium hydroxide solution to the sodium hydroxide solution reaction tank;
the carbon dioxide generation unit is used for calcining the input calcium carbonate to obtain carbon dioxide and calcium oxide;
the carbon dioxide generation unit is used for outputting the carbon dioxide to the carbon dioxide output module.
Preferably, the air multistage reaction treatment module further comprises a recovery unit;
the recovery unit comprises a water tank, and the water tank is connected with an outlet of the carbon dioxide generation unit;
the recovery unit is used for processing the calcium oxide input by the carbon dioxide generation unit based on the water tank to obtain the calcium hydroxide solution and outputting the calcium hydroxide solution to the calcium hydroxide solution reaction tank.
Preferably, the carbon dioxide extraction equipment further comprises a carbon dioxide purification module communicated with the air multistage reaction treatment module;
the carbon dioxide purification module is used for drying and purifying the carbon dioxide input from the air multistage reaction treatment module.
Preferably, the energy storage system further comprises a power generation device electrically connected with the carbon dioxide energy storage device and the carbon dioxide extraction device respectively;
the power generation device is used for supplying power to the carbon dioxide energy storage device and the carbon dioxide extraction device.
Preferably, the power generation equipment is a power generation module integrated with N types of energy sources; wherein N is more than or equal to 2 and is an integer.
Preferably, the power generation equipment comprises a solar photovoltaic array, a solar heat collection array and a wind power generator set.
Preferably, the carbon dioxide energy storage device comprises a low-pressure gas storage chamber, a multi-stage compressor, a high-pressure gas storage chamber and a multi-stage expander which are sequentially communicated, and a gas outlet of the multi-stage expander is communicated with a gas inlet of the low-pressure gas storage chamber through a first pipeline of the preheater;
the multistage compressor is electrically connected with the multistage expander through a generator;
wherein an inter-stage cooler is arranged between two adjacent compressors in the multi-stage compressor;
a high-temperature reheater is arranged in front of each expansion machine of the multistage expansion machines;
the second pipeline of the preheater is communicated with the multistage expander and the high-pressure air storage chamber;
the low-pressure gas storage chamber is used for recovering and storing the carbon dioxide output by the multistage expansion machine;
the multistage compressor is used for compressing and storing energy for the input carbon dioxide;
the high-pressure gas storage chamber is used for temporarily storing the input carbon dioxide;
the multistage expander is used for expanding and releasing energy of the input carbon dioxide;
the preheater is used for absorbing the waste heat released by the outlet of the multistage expander and preheating the carbon dioxide entering the high-temperature reheater;
the interstage cooler is used for cooling the carbon dioxide in the compression energy storage process;
the high-temperature reheater is used for heating the carbon dioxide in the expansion energy release process.
Preferably, the carbon dioxide energy storage equipment further comprises a cold water tower and a hot water tower;
an inlet of the cold water tower is connected with a side outlet of the high-temperature reheater, an outlet of the cold water tower is connected with an inlet of the hot water tower, and an outlet of the hot water tower is connected with a side inlet of the high-temperature reheater;
the cold water tower is used for recovering the heat storage medium which absorbs heat through the high-temperature reheater;
the power generation equipment is used for supplying heat to the heat storage medium in the cooling tower;
the hot water tower is used for storing the heat storage medium after heat supply of the power generation equipment and providing the heat storage medium containing heat for the high-temperature reheater.
Preferably, the carbon dioxide energy storage device further comprises a first throttle valve, a second throttle valve, a third throttle valve and a carbon dioxide temporary storage tank;
the first throttle valve is arranged between the high-pressure air storage chamber and the preheater;
the second throttling valve is arranged between the low-pressure air storage chamber and the multistage compressor;
the carbon dioxide temporary storage tank is arranged between the multistage compressor and the carbon dioxide extraction equipment;
the third throttle valve is arranged between the carbon dioxide temporary storage tank and the multistage compressor;
the first throttling valve and the second throttling valve are used for ensuring that the pressure of the carbon dioxide entering the multi-stage compressor and the multi-stage expander is a constant value;
the temporary storage tank for carbon dioxide and the third throttle valve are used for stably releasing the carbon dioxide output by the carbon dioxide extraction device.
The positive progress effects of the invention are as follows:
according to the invention, carbon dioxide is used as an energy storage medium, and a carbon dioxide extraction device is additionally arranged, so that the stable supply of the carbon dioxide energy storage medium in the energy storage system is ensured; the carbon dioxide extraction equipment is driven by the combination of wind energy and solar energy, when the illumination condition is good, the power supply of the carbon dioxide extraction equipment can be realized by fully utilizing solar power generation, the preheating of the carbon dioxide can be realized by utilizing solar heat collection, when the illumination condition is not good, the power supply of the carbon dioxide extraction equipment can be realized by utilizing wind power generation, the stable operation of the carbon dioxide extraction equipment can be maintained, the traditional power consumption is reduced, and the comprehensive utilization efficiency of renewable energy sources is improved by fully utilizing the wind-solar complementary effect.
Drawings
Fig. 1 is a block schematic diagram of a carbon dioxide energy storage system according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a carbon dioxide energy storage system according to embodiment 2 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the invention thereto.
Example 1
The present embodiment provides a carbon dioxide energy storage system, as shown in fig. 1, the energy storage system includes a carbon dioxide energy storage device 1 and a carbon dioxide extraction device 2;
the carbon dioxide extraction device 2 comprises an air multistage reaction processing module 21 and a carbon dioxide output module 22;
the air multistage reaction processing module 21 is used for sequentially performing multistage reaction processing on the input air to extract carbon dioxide and outputting the carbon dioxide to the carbon dioxide output module 22;
wherein different reaction treatments of the multi-stage reaction treatment correspond to different chemical treatment processes;
the carbon dioxide output module 22 is used for outputting carbon dioxide to an air inlet of the carbon dioxide energy storage device 1;
the carbon dioxide energy storage device 1 is used for low-pressure and/or high-pressure storage of the carbon dioxide supplied.
In this embodiment, ambient air enters the air multistage reaction processing module 21 and is subjected to multistage chemical treatment to obtain carbon dioxide, the carbon dioxide is output to the carbon dioxide energy storage device 1 from the carbon dioxide output module 22, and the carbon dioxide energy storage device 1 performs compression energy storage and/or expansion energy release on the input carbon dioxide.
The invention can store redundant electric energy by compressing carbon dioxide in the low peak period of power utilization, the electric energy source can be renewable energy sources such as solar energy, wind energy and the like, and the electric energy source can also be accessed to an external power grid to store electric energy of other sources; in the electricity utilization peak period, high-pressure carbon dioxide expansion can be utilized to do work externally to release stored energy, and the released energy can be supplied to an external power grid and can also be used as energy supply of the system. Carbon dioxide is used as an energy storage medium, and carbon dioxide extraction equipment is additionally arranged, so that stable supply of the carbon dioxide energy storage medium of the system can be guaranteed.
Example 2
This embodiment provides a carbon dioxide energy storage system, which is a further improvement of embodiment 1, as shown in fig. 2.
In an implementable version, the air multistage reaction treatment module 21 includes an air contact unit 211, a reaction unit 212, and a carbon dioxide generation unit 213;
the air contact unit 211 is used for filtering the input air to obtain air with the carbon dioxide content less than a set threshold value and discharging the air;
the air contact unit 211 is configured to process carbon dioxide in input air to obtain a sodium carbonate solution based on a sodium hydroxide solution reaction tank contained in the air contact unit and output the sodium carbonate solution to the reaction unit 212;
the reaction unit 212 is used for processing the input sodium carbonate solution to obtain calcium carbonate and sodium hydroxide solution based on the contained calcium hydroxide solution reaction tank;
the reaction unit 212 is configured to output calcium carbonate to the carbon dioxide generation unit 213, and the reaction unit 212 outputs a sodium hydroxide solution to the sodium hydroxide solution reaction tank.
The carbon dioxide generation unit 213 is configured to calcine the input calcium carbonate to obtain carbon dioxide and calcium oxide;
the carbon dioxide generation unit 213 is configured to output carbon dioxide to the carbon dioxide output module 22.
In one embodiment, the air multistage reaction treatment module 21 further comprises a recycling unit 214;
the recovery unit 214 includes a water tank connected to an outlet of the carbon dioxide generation unit 213;
the recycling unit 214 is configured to process the calcium oxide input by the carbon dioxide generating unit 213 based on the water pool to obtain a calcium hydroxide solution, and output the calcium hydroxide solution to the calcium hydroxide solution reaction tank.
In this embodiment, the carbon dioxide extraction device 2 completes two processes.
The first process is extraction of carbon dioxide, carbon dioxide in ambient air enters the air contact unit 211 to react with sodium hydroxide solution to obtain sodium carbonate solution, the sodium carbonate solution enters the reaction unit 212 to react with calcium hydroxide solution to obtain calcium carbonate and sodium hydroxide solution, and the calcium carbonate enters the carbon dioxide generation unit 213 to be calcined to obtain carbon dioxide;
the second process is recycling of calcium oxide, calcium oxide is obtained by calcining calcium carbonate in the carbon dioxide generation unit 213, calcium oxide reacts with water to obtain a calcium hydroxide solution, the calcium hydroxide solution enters the reaction unit 212 to be recycled, and the sodium hydroxide solution obtained in the reaction unit 212 enters the air contact unit 211 to be recycled.
In an implementation scheme, the carbon dioxide extraction device 2 further includes a carbon dioxide purification module 23 communicated with the air multistage reaction treatment module 21;
the carbon dioxide purification module 23 is used for drying and purifying the carbon dioxide input from the air multistage reaction treatment module 21.
In an implementable solution, the energy storage system further comprises a power generation device 3 electrically connected to the carbon dioxide energy storage device 1 and the carbon dioxide extraction device 2, respectively;
the power generation device 3 is used to supply power to the carbon dioxide energy storage device 1 and the carbon dioxide extraction device 2.
In an implementable solution, the power generation device 3 is a power generation module integrating N types of energy; wherein N is more than or equal to 2 and is an integer.
In the embodiment, the power generation equipment can utilize various types of energy sources, including solar energy, geothermal energy, tidal energy, wind energy and the like, when one energy source is insufficient in supply due to natural conditions, other energy sources can be complementarily adopted for supply, and the stability of the energy storage system is improved.
In an implementable solution, the power plant 3 comprises a solar photovoltaic array 31, a solar heat collection array 32 and a wind-powered generator set 33.
In this embodiment, the solar photovoltaic array 31 generates electricity to supply the carbon dioxide extraction device 2, the solar heat collection array 32 is used for supplying the carbon dioxide energy storage device 1 with preheated carbon dioxide to improve the power generation efficiency of the energy storage system, and the wind power generator set 33 is used for supplementing the shortage of the electric energy of the solar photovoltaic array 31 and the solar heat collection array 32.
In an implementation scheme, the carbon dioxide energy storage device 1 comprises a low-pressure gas storage chamber 111, a multi-stage compressor 112, a high-pressure gas storage chamber 113 and a multi-stage expander 114 which are sequentially communicated, and a gas outlet of the multi-stage expander 114 is communicated with a gas inlet of the low-pressure gas storage chamber 111 through a first pipeline of a preheater 115;
the multistage compressor 112 and the multistage expander 114 are electrically connected through a generator 116;
each of the multi-stage expanders 114 is preceded by a high temperature reheater 118;
a second conduit of the preheater 115 communicates the multistage expander 114 and the high pressure receiver 113;
the low-pressure gas storage chamber 111 is used for recovering and storing the carbon dioxide output by the multistage expander 114;
the multistage compressor 112 is used for compressing and storing energy for the input carbon dioxide;
the high-pressure gas storage chamber 113 is used for temporarily storing the input carbon dioxide;
the multi-stage expander 114 is used for expanding and releasing energy of the input carbon dioxide;
the preheater 115 is used for absorbing the waste heat released by the outlet of the multi-stage expander 114 and providing preheating for the carbon dioxide entering the high-temperature reheater 118;
the interstage cooler 117 is used for cooling the carbon dioxide in the process of compressing and storing energy;
the high temperature reheater 118 is used to heat the carbon dioxide during the expansion energy release process.
In this embodiment, the number of compressors of the multistage compressor 112 and the number of expanders of the multistage expander 114 may be determined according to actual needs. In the actual operation, the pressure (< 3 MPa) of the low-pressure air receiver 111 and the pressure (240 MPa) of the high-pressure air receiver 113 are different greatly, so the total compression ratio is large. Therefore, a three-stage compression scheme is adopted in the design of the compression stage so as to reduce the power consumption of the compressor unit. In the expansion stage, the carbon dioxide at the outlet of the high-pressure air storage chamber 113 is throttled to a certain pressure to stabilize the energy release pressure, and the expansion ratio is far lower than the compression ratio, so that a two-stage expansion scheme is adopted. During energy storage, carbon dioxide stored in the low-pressure gas storage chamber 111 enters the multistage compressor 112 for multistage compression and interstage cooling under the driving of the motor, and finally enters the high-pressure gas storage chamber 113 for storage. Here, the multistage compressor 112 includes a first compressor 1121, a second compressor 1122, and a third compressor 1123, the interstage cooler 117 includes a first cooler 1171 and a second cooler 1172, the multistage expander 114 includes a first expander 1141 and a second expander 1142, and the high temperature reheater 118 includes a first reheater 1181 and a second reheater 1182.
In an implementation scheme, the carbon dioxide energy storage device 1 further comprises a cold water tower 119 and a hot water tower 120;
an inlet of the cold water tower 119 is connected with a side outlet of the high-temperature reheater 118, an outlet of the cold water tower 119 is connected with an inlet of the hot water tower 120, and an outlet of the hot water tower 120 is connected with a side inlet of the high-temperature reheater 118;
the cold water tower 119 is used to recover the heat storage medium having absorbed heat by the high temperature reheater 118;
the power generation facility 3 is used for supplying heat to the heat storage medium in the cooling tower 119;
the hot water tower 120 is used for storing the heat storage medium supplied by the power generation facility 3 and providing the heat storage medium containing heat for the high-temperature reheater 118.
In this embodiment, during the energy release process, the high-pressure carbon dioxide first enters the preheater 115 to absorb the waste heat released by the multi-stage expander 114; secondly, the carbon dioxide preheated by the preheater 115 enters the high-temperature reheater 118 to exchange heat with the heat storage medium absorbing solar energy, and the high-pressure carbon dioxide enters the multi-stage expander 114 to perform work. The heat storage medium flowing out of the hot water tower 120 is cooled in the high temperature reheater 118 and then enters the cold water tower 119, the heat storage medium in the cold water tower 119 collects heat under the action of the power generation equipment 3, and the heat storage medium absorbing solar energy enters the hot water tower 120 for storage. In addition, a side inlet of the cooling tower 119 may be connected to a side outlet of the inter-stage cooler 117, so as to recover heat absorbed by the inter-stage cooler 117, reduce heat loss, and improve energy utilization.
In an implementable scenario, the carbon dioxide energy storage device 1 further comprises a first throttle valve 121, a second throttle valve 122, a third throttle valve 123 and a temporary storage tank 124 for carbon dioxide;
the first throttle valve 121 is disposed between the high pressure air receiver 113 and the preheater 115;
the second throttle valve 122 is provided between the low-pressure gas storage chamber 111 and the multistage compressor 112;
a temporary carbon dioxide storage tank 124 is provided between the multistage compressor 112 and the carbon dioxide extraction plant 2;
the third throttle valve 123 is provided between the carbon dioxide temporary storage tank 124 and the multistage compressor 112;
the first throttle valve 121 and the second throttle valve 122 are used to ensure that the pressure of carbon dioxide entering the multistage compressor 112 and the multistage expander 114 is constant;
the carbon dioxide temporary storage tank 124 and the third throttle valve 123 are used to stably release the carbon dioxide outputted from the carbon dioxide extraction apparatus 2.
In this embodiment, the pressure of the carbon dioxide stored in the high-pressure gas storage chamber 113 and the low-pressure gas storage chamber 111 is gradually reduced along with the release process during the release process, and in order to ensure that the pressure of the carbon dioxide entering the multistage compressor 112 and the multistage expander 114 is a constant value, a throttle valve pressure limiting mode is applied during the circulation to ensure that the pressure at the inlet of the multistage compressor 112 and the inlet of the multistage expander 114 is a constant value.
According to the invention, carbon dioxide is used as an energy storage medium, and a carbon dioxide extraction device is additionally arranged, so that the stable supply of the carbon dioxide energy storage medium in the energy storage system is ensured; the carbon dioxide extraction equipment is driven by the combination of wind energy and solar energy, when the illumination condition is good, the power supply of the carbon dioxide extraction equipment can be realized by fully utilizing solar power generation, the preheating of the carbon dioxide can be realized by utilizing solar heat collection, when the illumination condition is not good, the power supply of the carbon dioxide extraction equipment can be realized by utilizing wind power generation, the stable operation of the carbon dioxide extraction equipment can be maintained, the traditional power consumption is reduced, and the comprehensive utilization efficiency of renewable energy sources is improved by fully utilizing the wind-solar complementary effect.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes or modifications to these embodiments may be made by those skilled in the art without departing from the principle and spirit of this invention, and these changes and modifications are within the scope of this invention.
Claims (10)
1. A carbon dioxide energy storage system, characterized in that the energy storage system comprises a carbon dioxide energy storage device and a carbon dioxide extraction device;
the carbon dioxide extraction equipment comprises an air multistage reaction treatment module and a carbon dioxide output module;
the air multistage reaction processing module is used for sequentially carrying out multistage reaction processing on input air so as to extract carbon dioxide and output the carbon dioxide to the carbon dioxide output module;
wherein different reaction treatments of the multi-stage reaction treatment correspond to different chemical treatment processes;
the carbon dioxide output module is used for outputting the carbon dioxide to an air inlet of the carbon dioxide energy storage device;
the carbon dioxide energy storage device is used for low-pressure storage and/or high-pressure storage of the input carbon dioxide.
2. The carbon dioxide energy storage system of claim 1, wherein the air multi-stage reaction processing module comprises an air contacting unit, a reaction unit, and a carbon dioxide generating unit;
the air contact unit is used for filtering input air to obtain air with the carbon dioxide content smaller than a set threshold value and discharging the air;
the air contact unit is used for processing carbon dioxide in input air based on a sodium hydroxide solution reaction tank to obtain a sodium carbonate solution and outputting the sodium carbonate solution to the reaction unit;
the reaction unit is used for processing the input sodium carbonate solution to obtain calcium carbonate and the sodium hydroxide solution based on a contained calcium hydroxide solution reaction tank;
the reaction unit is used for outputting the calcium carbonate to the carbon dioxide generation unit, and outputting the sodium hydroxide solution to the sodium hydroxide solution reaction tank;
the carbon dioxide generation unit is used for calcining the input calcium carbonate to obtain carbon dioxide and calcium oxide;
the carbon dioxide generation unit is used for outputting the carbon dioxide to the carbon dioxide output module.
3. The carbon dioxide energy storage system of claim 2, wherein the air multi-stage reaction processing module further comprises a recovery unit;
the recovery unit comprises a water tank, and the water tank is connected with an outlet of the carbon dioxide generation unit;
the recovery unit is used for processing the calcium oxide input by the carbon dioxide generation unit based on the water tank to obtain the calcium hydroxide solution and outputting the calcium hydroxide solution to the calcium hydroxide solution reaction tank.
4. The carbon dioxide energy storage system of claim 1, wherein the carbon dioxide extraction device further comprises a carbon dioxide purification module disposed in communication with the air multi-stage reaction processing module;
the carbon dioxide purification module is used for drying and purifying the carbon dioxide input from the air multistage reaction treatment module.
5. The carbon dioxide energy storage system of claim 1, further comprising a power generation device electrically connected to the carbon dioxide energy storage device and the carbon dioxide extraction device, respectively;
the power generation device is used for supplying power to the carbon dioxide energy storage device and the carbon dioxide extraction device.
6. The carbon dioxide energy storage system of claim 5, wherein the power generation device is a power generation module that integrates N types of energy; wherein N is more than or equal to 2 and is an integer.
7. The carbon dioxide energy storage system of claim 5, wherein the power generation equipment comprises a solar photovoltaic array, a solar thermal collection array, and a wind-powered generator set.
8. The carbon dioxide energy storage system as claimed in claim 6 or 7, wherein the carbon dioxide energy storage device comprises a low-pressure gas storage chamber, a multi-stage compressor, a high-pressure gas storage chamber and a multi-stage expander which are communicated in sequence, and the gas outlet of the multi-stage expander is communicated with the gas inlet of the low-pressure gas storage chamber through a first pipeline of the preheater;
the multistage compressor is electrically connected with the multistage expander through a generator;
wherein an inter-stage cooler is arranged between two adjacent compressors in the multi-stage compressor;
a high-temperature reheater is arranged in front of each expansion machine of the multistage expansion machines;
the second pipeline of the preheater is communicated with the multistage expander and the high-pressure air storage chamber;
the low-pressure gas storage chamber is used for recovering and storing the carbon dioxide output by the multistage expansion machine;
the multistage compressor is used for compressing and storing energy for the input carbon dioxide;
the high-pressure gas storage chamber is used for temporarily storing the input carbon dioxide;
the multistage expander is used for expanding and releasing energy of the input carbon dioxide;
the preheater is used for absorbing the waste heat released by the outlet of the multistage expander and preheating the carbon dioxide entering the high-temperature reheater;
the interstage cooler is used for cooling the carbon dioxide in the compressed energy storage process;
the high-temperature reheater is used for heating the carbon dioxide in the expansion energy release process.
9. The carbon dioxide energy storage system of claim 8, wherein the carbon dioxide energy storage device further comprises a cold water tower and a hot water tower;
an inlet of the cold water tower is connected with a side outlet of the high-temperature reheater, an outlet of the cold water tower is connected with an inlet of the hot water tower, and an outlet of the hot water tower is connected with a side inlet of the high-temperature reheater;
the cold water tower is used for recovering the heat storage medium which absorbs heat through the high-temperature reheater;
the power generation equipment is used for supplying heat to the heat storage medium in the cooling tower;
the hot water tower is used for storing the heat storage medium after heat supply of the power generation equipment and providing the heat storage medium containing heat for the high-temperature reheater.
10. The carbon dioxide energy storage system of claim 8, wherein the carbon dioxide energy storage device further comprises a first throttling valve, a second throttling valve, a third throttling valve, and a temporary storage tank for carbon dioxide;
the first throttle valve is arranged between the high-pressure air storage chamber and the preheater;
the second throttle valve is arranged between the low-pressure air storage chamber and the multistage compressor;
the carbon dioxide temporary storage tank is arranged between the multistage compressor and the carbon dioxide extraction equipment;
the third throttle valve is arranged between the carbon dioxide temporary storage tank and the multistage compressor;
the first throttling valve and the second throttling valve are used for ensuring that the pressure of the carbon dioxide entering the multi-stage compressor and the multi-stage expander is a constant value;
the temporary storage tank for carbon dioxide and the third throttle valve are used for stably releasing the carbon dioxide output by the carbon dioxide extraction device.
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| CN202211226744.6A CN115539161A (en) | 2022-10-09 | 2022-10-09 | Carbon dioxide energy storage system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116388405A (en) * | 2023-06-07 | 2023-07-04 | 势加透博(河南)能源科技有限公司 | System and method for integrating carbon dioxide seal and energy storage power generation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116388405A (en) * | 2023-06-07 | 2023-07-04 | 势加透博(河南)能源科技有限公司 | System and method for integrating carbon dioxide seal and energy storage power generation |
| CN116388405B (en) * | 2023-06-07 | 2023-08-29 | 势加透博(河南)能源科技有限公司 | System and method for integrating carbon dioxide seal and energy storage power generation |
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