CN115076599A - Direct contact type gas-heat common storage device and energy storage system - Google Patents
Direct contact type gas-heat common storage device and energy storage system Download PDFInfo
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- CN115076599A CN115076599A CN202210460479.1A CN202210460479A CN115076599A CN 115076599 A CN115076599 A CN 115076599A CN 202210460479 A CN202210460479 A CN 202210460479A CN 115076599 A CN115076599 A CN 115076599A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 18
- 239000003463 adsorbent Substances 0.000 claims abstract description 95
- 239000012530 fluid Substances 0.000 claims abstract description 58
- 239000011148 porous material Substances 0.000 claims abstract description 28
- 230000008859 change Effects 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 95
- 238000005338 heat storage Methods 0.000 claims description 30
- 238000001179 sorption measurement Methods 0.000 claims description 20
- 238000003795 desorption Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 35
- 230000008569 process Effects 0.000 abstract description 35
- 238000007599 discharging Methods 0.000 description 6
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 229910001579 aluminosilicate mineral Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
Images
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
- F17C11/00—Use of gas-solvents or gas-sorbents in vessels
-
- 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
-
- 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
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
-
- 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
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
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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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/013—Carbone dioxide
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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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0176—Solids and gas
-
- 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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0302—Heat exchange with the fluid by heating
- F17C2227/0309—Heat exchange with the fluid by heating using another fluid
- F17C2227/0323—Heat exchange with the fluid by heating using another fluid in a closed loop
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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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0337—Heat exchange with the fluid by cooling
- F17C2227/0341—Heat exchange with the fluid by cooling using another fluid
- F17C2227/0355—Heat exchange with the fluid by cooling using another fluid in a closed loop
-
- 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
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/04—Reducing risks and environmental impact
- F17C2260/046—Enhancing energy recovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The invention provides a direct-contact gas-heat CO-storage device and an energy storage system 2 Adsorbent of the shaped CO 2 The adsorbent is provided with a pore passage, two ends of the pore passage are connected with a heat exchange pipeline, and fluid is suitable for passing through the heat exchange pipeline and the pore passage and the formed CO 2 And the two sides of the shell of the gas storage tank are respectively provided with an air inlet valve and an air outlet valve. The direct contact type gas-heat common storage device provided by the invention can be used for forming CO 2 The adsorbent is used for high-efficiency heat exchange and molded CO is utilized 2 The adsorbent adsorbs and desorbs CO 2 The heat change in the process stores heat, and the gas storage performance and the economical efficiency of the gas-heat co-storage device are improved.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to a direct-contact type gas-heat common storage device and an energy storage system.
Background
In CO 2 During energy storage, to prevent CO 2 Gas leakage requires closed circulation for CO 2 The gas is stored. In the prior art, in order to improve the CO 2 The storage capacity of gas often adopts the mode that improves gas storage pressure to promote gas storage density, but this kind of mode can lead to the gas storage device wall thickness to increase to lead to investment cost, and there is great potential safety hazard in the high pressure gas storage mode.
The silicon-aluminum-based and carbon-based materials with abundant microporous structures can adsorb CO in large quantity 2 The molecules can be used as an effective means for high-density gas storage under low-pressure conditions, however, the equilibrium adsorption capacity of the adsorbent is greatly influenced by the temperature, and the heat effect in the adsorption and desorption processes can greatly influence the adsorption performance of the adsorbent. In the prior art, a common adsorbent is a porous medium adsorbent, and the heat exchange efficiency is low due to high porosity and poor heat conductivity. Therefore, it is necessary to solve the problem of efficient heat exchange of the adsorbent during the adsorption and desorption processes, so as to control the temperature and improve the gas storage performance and economy.
Disclosure of Invention
The problem solved by the invention is how to realize CO 2 High-efficiency heat exchange is performed in the gas adsorption and desorption processes, so that the gas storage performance and the economy are improved.
In order to solve the above problems, the present invention provides a direct contact type gas-heat CO-storage device, which comprises a gas tank shell, wherein the inside of the gas tank shell is provided with a formed CO 2 Adsorbent of the shaped CO 2 The adsorbent is provided with a pore passage, two ends of the pore passage are connected with a heat exchange pipeline, and fluid is suitable for passing through the heat exchange pipeline and the pore passage and the formed CO 2 And the two sides of the shell of the gas storage tank are respectively provided with an air inlet valve and an air outlet valve.
Preferably, the intake valve and the outlet valve are pressure control valves.
Preferably, the direct-contact gas-heat common storage device further comprises a heat storage tank and a heat storage tank, and the heat storage tank are adapted to exchange heat with the fluid in the heat exchange pipeline.
Preferably, the heat exchange medium in the heat storage tank and the cold storage tank is molten salt.
The invention utilizes the formed CO 2 Adsorbent for adsorbing and desorbing CO 2 The heat change and the temperature change in the process are relative to the formed CO 2 Adsorption of CO by adsorbent 2 Influence of the ability to convert CO 2 The adsorption and desorption processes are combined with heat storage, and when exhausting, high-temperature fluid is input to reduce formed CO 2 The adsorption capacity of the adsorbent, and the gas outlet valve is opened for exhausting gas, and CO is simultaneously used 2 The formed adsorbent stores desorption heat and sensible heat of the adsorbent; when the gas is inflated, low-temperature fluid is input to improve the formed CO 2 The adsorption capacity of the adsorbent is improved, and the air inlet valve is opened for air inflation, so that CO can be completely adsorbed 2 While charging and discharging air, heat is stored by utilizing the change of heat, thereby realizing gas-heat common storage; in addition, by forming CO 2 The adsorbent is provided with a pore passage, and two ends of the pore passage are connected with the heat exchange pipeline, so that fluid for heat exchange flows through the pore passage and is used for forming CO 2 Direct contact of the adsorbent improves the fluid and formed CO 2 Heat exchange efficiency of adsorbent and improvement of molded CO 2 The temperature uniformity of the adsorbent avoids the problem of low heat exchange efficiency caused by poor heat conductivity of the porous medium adsorbent so as to ensure the gas storage performance of the porous medium adsorbent; the direct contact type gas-heat common storage device provided by the invention can be used for forming CO 2 The adsorbent is used for high-efficiency heat exchange and molded CO is utilized 2 The adsorbent adsorbs and desorbs CO 2 The heat change in the process stores heat, and the gas storage performance and the economy of the gas-heat co-storage device are improved.
Another object of the present invention is to provide an energy storage system, which includes the above direct-contact gas-heat common storage device and a heat supply network.
Preferably, the heat storage device further comprises a heat exchanger, and the heat storage tank or the cold storage tank exchanges heat with the fluid in the heat exchange pipeline through the heat exchanger.
Preferably, the system further comprises a heat pump, and the heat supply network backwater in the heat supply network is suitable for being converted into low-temperature fluid or high-temperature fluid through the heat pump.
Preferably, the charging and discharging is performed by varying the heat of the direct contact type gas-heat co-storage device by a low-temperature fluid or a high-temperature fluid in a heat supply network.
Preferably, when the exhaust is needed, the high-temperature fluid in the heat supply network is input into the direct contact type gas-heat CO-storage device for heat exchange, so that the formed CO is formed 2 CO in adsorbent 2 Gas is discharged after desorption, and CO is simultaneously discharged 2 The formed adsorbent stores desorption heat and sensible heat of the adsorbent.
Preferably, when gas charging is needed, the low-temperature fluid in the heat supply network is input into the direct contact type gas-heat CO-storage device for heat exchange, and CO is input simultaneously 2 Gas, make CO shaped 2 The adsorbent adsorbing the input CO 2 The gas, the heat of adsorption generated during the process and the sensible heat of the adsorbent are brought out by the cryogenic fluid and then heat is supplied through the heat supply network.
The direct contact type gas-heat CO-storage device and the heat supply network form the energy storage device, so that the CO in the gas-heat CO-storage device can be reasonably utilized by the cold-heat circulation device in the heat supply network 2 The heat exchange of the adsorbent ensures the gas storage performance and improves the energy storage capacity, and simultaneously CO can be utilized 2 Adsorbent for adsorbing and desorbing CO 2 The heat change in the process is used for storing heat, and the economical efficiency is higher.
Drawings
FIG. 1 is a schematic structural diagram of a direct contact type gas-heat common storage device according to an embodiment of the present invention;
FIG. 2 shows a molded CO in an embodiment of the present invention 2 The structure of the pore channel in the adsorbent is shown schematically;
FIG. 3 is a schematic view illustrating a working process of a direct contact type gas-heat storage device during the exhaust heat storage process according to an embodiment of the present invention;
fig. 4 is a schematic view of a working flow of the direct contact type gas-heat co-storage device in the process of gas-filling and heat-storage according to the embodiment of the invention.
Description of reference numerals:
1-gas storage tank shell; 11-formation of CO 2 An adsorbent; 111-channels; 12-a heat exchange conduit; 13-an intake valve; 14-gas outlet valve; 2-heat storage tank; 3-a cold storage tank; 4-a heat exchanger; 5-heat pump.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, specific embodiments thereof are described in detail below.
It should be noted that the features in the embodiments of the present invention may be combined with each other without conflict. Further, the direction indicated by an arrow in the drawings is a flow direction of a gas or a medium.
As shown in fig. 1 and 2, the embodiment of the invention provides a direct contact type gas-heat CO-storage device, which comprises a gas storage tank shell 1, wherein the gas storage tank shell 1 is internally provided with formed CO 2 Adsorbent 11, molded CO 2 The adsorbent 11 is provided with a pore passage 111, two ends of the pore passage 111 are connected with the heat exchange pipeline 12, and fluid is suitable for passing through the heat exchange pipeline 12 and the pore passage 111 and forming CO 2 The adsorbent 11 exchanges heat, and an air inlet valve 13 and an air outlet valve 14 are respectively arranged on two sides of the shell 1 of the air storage tank.
Specifically, the gas storage tank shell 1 is made of steel and is subjected to heat preservation treatment, so that the heat preservation performance of the gas storage tank shell 1 is improved, the heat loss is reduced, and formed CO is arranged in the gas storage tank shell 1 2 Adsorbent 11, formed CO 2 The adsorbent 11 is capable of adsorbing and desorbing CO 2 Gas and higher temperature, shaping CO 2 The poorer the adsorption performance of the adsorbent 11, on the contrary, the lower the temperature, the better the adsorption performance; in addition, in the formation of CO 2 Adsorbent 11 adsorbs CO 2 ProcedureA large amount of heat of adsorption is generated. By forming CO 2 The adsorbent 11 is provided with a pore passage 111, and two ends of the pore passage 111 are connected with the heat exchange pipeline 12, so that a low-temperature fluid or a high-temperature fluid can flow into the pore passage 111 through the heat exchange pipeline 12 and form CO in the process of charging and discharging air of the direct contact type gas-heat CO-storage device 2 The adsorbent 11 is in direct contact for heat exchange, the heat exchange efficiency of the direct contact is high, and the formed CO after heat exchange 2 The temperature of the adsorbent 11 can be uniformly controlled. During operation of the device, the exhaust and inflation processes are performed by controlling the opening and closing of the intake valve 13 and the exhaust valve 14.
By using formed CO 2 Adsorbent 11 is used for adsorbing and desorbing CO 2 Heat change exists in the process, and CO is formed 2 Adsorbent 11 vs. CO 2 The adsorption capacity of (A) is also affected by temperature change, and CO is adsorbed 2 The adsorption and desorption processes are combined with heat storage, and CO can be completed 2 While storing, heat storage is carried out by utilizing the change of heat, thereby realizing gas-heat common storage; in addition, by forming CO 2 The adsorbent 11 is provided with a pore channel, and two ends of the pore channel 111 are connected with the heat exchange pipeline 12, so that the fluid for heat exchange flows through the pore channel 111 and forms CO 2 Adsorbent 11 is in direct contact to enhance the flow and formation of CO 2 Heat exchange efficiency of the adsorbent 11 and ensuring molded CO 2 The temperature uniformity of the adsorbent 11 avoids the problem of low heat exchange efficiency caused by poor heat conductivity of the porous medium adsorbent, so as to ensure the gas storage performance of the adsorbent.
Illustratively, the shaping CO 2 The adsorbent 11 is zeolite honeycomb formed CO 2 An adsorbent. Zeolite as an aluminosilicate mineral having a porous structure and adsorbing CO 2 Is excellent in the ability of the resin composition and is environmentally friendly.
In addition, the air inlet valve 13 and the air outlet valve 14 in the direct contact type gas-heat co-storage device are pressure control valves, when the pressure in the air storage tank shell 1 changes, the air inlet valve 13 and the air outlet valve 14 can be automatically opened and closed according to the pressure change condition in the air storage tank shell 1, the air inlet valve 13 and the air outlet valve 14 are also electrically connected with a controller, and the controller can control the opening and closing of the air inlet valve 13 and the air outlet valve 14, so that the automation degree of the device is improved.
To avoid negative pressure air mixing with CO 2 The gas ensures the stable operation of the micro-positive pressure of the device, a preset upper limit value and a preset lower limit value of the micro-positive pressure are set, and in the inflating process, the controller controls the opening of the air inlet valve 13 to maintain the micro-positive pressure operation; during the exhaust process, the controller controls the opening of the initial valve 14 to discharge CO 2 And (4) gas, and micro-positive pressure operation is maintained.
The direct contact type gas-heat CO-storage device further comprises a heat storage tank 2 and a cold storage tank 3, heat exchange media are arranged in the heat storage tank 2 and the cold storage tank 3, the heat exchange media can exchange heat with fluid to obtain high-temperature fluid or low-temperature fluid, and then the high-temperature fluid or the low-temperature fluid is used for forming CO 2 And carrying out heat exchange. Illustratively, the heat exchange medium in the heat storage tank 2 and the cold storage tank 3 is molten salt, heat generated by a solar heat storage manner is stored in the heat storage tank 2, and then the molten salt heat transfer medium is transferred between the heat storage tank 2 and the cold storage tank 3 to exchange heat with the fluid in the heat exchange pipeline 12, so as to obtain low-temperature fluid or high-temperature fluid, wherein the molten salt has high heat transfer performance, low working pressure and low cost.
Another embodiment of the present invention provides an energy storage system, which includes the direct-contact gas-heat co-storage device and a heat supply network.
In addition, as shown in fig. 3 and 4, the energy storage system further includes a heat exchanger 4 and a heat pump 5, wherein the heat exchanger 4 is disposed on the heat exchange pipeline 12, so that the fluid in the heat exchange pipeline 12 exchanges heat with the heat exchange medium in the heat storage tank 2 or the cold storage tank 3 in the heat exchanger 4, thereby obtaining a high-temperature fluid or a low-temperature fluid, which is used for heating or cooling the gas storage tank; the heat pump 5 is positioned between different heat exchange pipelines 12 on two sides of the gas storage tank shell 1, low-temperature heat supply network backwater in the heat supply network can be further converted into low-temperature fluid or high-temperature fluid through the heat pump 5, and the obtained low-temperature fluid or high-temperature fluid is used for heat exchange in the gas storage tank shell 1 and heat supply of the heat supply network.
In particular, the direct contact type gas-heat co-storage device is enabled by low-temperature fluid or high-temperature fluid in a heat supply networkIs changed to inflate and deflate. When the exhaust is needed, high-temperature fluid in the heat supply network is input into the direct contact type gas-heat CO-storage device for heat exchange, so that the formed CO is formed 2 CO in adsorbent 2 Gas is discharged after desorption, and CO is simultaneously discharged 2 The formed adsorbent stores desorption heat and sensible heat of the adsorbent; when gas filling is needed, the low-temperature fluid in the heat supply network is input into the direct contact type gas-heat CO-storage device for heat exchange, and CO is input simultaneously 2 Gas, make CO shaped 2 The adsorbent adsorbing the input CO 2 The gas, the heat of adsorption generated in the process, is carried away by the cryogenic fluid and is supplied by the heat supply network.
Illustratively, the exhaust process includes:
high-temperature fluid enters the formed CO through the heat exchange pipeline 12 at one end of the pore canal 111 2 In the adsorbent 11, a high-temperature fluid and formed CO are mixed 2 The adsorbent 11 exchanges heat and forms CO when gas is adsorbed 2 The temperature of the adsorbent 11 increases, causing the gas to reform CO 2 Removing the adsorbent 11;
when the gas is removed to a certain degree, the pressure in the gas storage tank shell 1 is increased, and when the pressure in the gas storage tank shell 1 is greater than a preset value, the gas outlet valve 14 is opened to exhaust the gas; controlling the opening of the air outlet valve 14 to maintain the micro-positive pressure operation in the air storage tank shell 1; when forming CO 2 After the temperature of the adsorbent 11 rises to a predetermined temperature, the input of the high-temperature fluid is stopped, and the exhaust process is completed;
when the temperature and the pressure in the gas storage tank shell 1 reach preset values, the gas outlet valve 14 is closed, and the gas exhaust process is finished;
in the process, CO is formed 2 The high-temperature fluid after heat exchange of the adsorbent 11 flows out from the heat exchange pipeline 12 at the other end, and simultaneously CO flows out 2 The formed adsorbent stores desorption heat and sensible heat of the adsorbent.
The inflation process comprises the following steps:
the cryogenic fluid is introduced into the formed CO through the heat exchange conduit 12 at one end of the port 111 2 In the adsorbent 11, the cryogenic fluid is mixed with the formed CO 2 Adsorbent 11 exchanges heat, resulting inFormed CO 2 The temperature of adsorbent 11 decreases;
when forming CO 2 When the temperature of the adsorbent 11 is reduced, the residual gas in the gas storage tank shell 1 is adsorbed by the adsorbent, so that the pressure in the gas storage tank shell 1 is reduced, the gas inlet valve 13 is opened firstly, the pressure in the gas storage tank shell 1 is enabled to be micro-positive pressure, then the opening degree of the gas inlet valve 13 is controlled, and the micro-positive pressure in the gas storage tank shell 1 is maintained;
when the temperature and the pressure in the gas storage tank shell 1 reach preset values, the gas inlet valve 13 is closed, and the gas charging process is finished;
during this process, the charged gas is formed into CO 2 When the adsorbent 11 adsorbs, a large amount of heat is released and CO is formed 2 The low-temperature fluid after heat exchange of the adsorbent 11 flows out of the heat exchange pipeline 12 at the other end and supplies heat through a heat supply network.
By applying the direct contact type gas-heat CO-storage device, CO in the gas-heat CO-storage device can be reasonably utilized by the cold-heat circulating device in the heat supply network 2 The heat exchange of the adsorbent can ensure the gas storage performance and utilize CO 2 Adsorbent for adsorbing and desorbing CO 2 The heat quantity in the process is changed, and the economical efficiency is higher.
The direct contact type gas-heat co-storage device and the exhaust heat exchange and charge heat exchange process thereof are described in the following with specific embodiments:
the direct contact type gas-heat CO-storage device provided by the embodiment comprises a steel gas storage tank shell 1, wherein the gas storage tank shell 1 is subjected to heat preservation treatment, the diameter of the shell is 330mm, the length of the shell is 400mm, two sides of the gas storage tank shell 1 are respectively provided with an air inlet valve 13 and an air outlet valve 14 for filling or discharging gas in the gas storage tank shell 1, and 25kg of 13X zeolite honeycomb-shaped CO is filled in the gas storage tank shell 1 2 The adsorbent, and evenly distributed has a cylindrical pore 111 that runs through itself in the adsorbent, and pore 111 both ends are connected with two heat exchange tube 12 respectively, and fluid can get into pore 111 through heat exchange tube 12 to directly contact with the adsorbent and carry out the heat transfer. Wherein, the heat exchange pipes 12 at the two ends of the pore canal 111 are communicated with the pipeline in the heat supply network and enter through the low-temperature fluid and the high-temperature fluid in the heat supply networkThe device exchanges heat and realizes temperature control.
When the direct contact type gas-heat storage device is assembled, the direct contact type gas-heat storage device is inflated for the first time, nitrogen is firstly used for blowing the inside of the gas storage tank, the pressure in the gas storage tank is pumped to-0.999 bar through a vacuum pump, residual gas in the gas storage tank is removed, then pre-inflation is carried out, an air inlet valve is opened, and CO is introduced into the direct contact type gas-heat storage device 2 Introducing cold water at 5 deg.C into the heat exchange pipeline to cool CO 2 The heat generated in the adsorption process is used for completing the pre-charging process when the balance state of 293K and 1bar in the air storage tank is reached, and about 3200LCO is charged 2 And (3) the direct contact type gas-heat storage device, a heat supply network, a heat exchanger 4 and a heat pump 5 form an energy storage system.
As shown in fig. 3, the exhaust process includes:
in the exhaust stage, high-temperature steam of 200 ℃ is generated after heat exchange is carried out in the heat exchanger 4 through high-temperature molten salt in the heat storage tank and return water of a heat supply network, and enters formed CO through the heat exchange pipeline 12 2 In the pore 111 of the adsorbent 11, CO is formed 2 The adsorbent 11 is uniformly heated and simultaneously stores heat, so that CO in the adsorbent 2 Removing gas, when the gas is removed to a certain degree, the pressure in the gas storage tank is increased and is 1bar higher than the set pressure, opening a gas outlet valve 14, and discharging CO 2 A gas; and continuously introducing high-temperature steam, stopping supplying steam for heating when the temperature in the gas storage tank reaches 200 ℃ and the pressure is 1bar, closing the gas outlet valve 14, finishing the process of exhausting and storing heat, and discharging about 2800L of gas from the gas storage tank.
As shown in fig. 4, the inflation process includes:
when the charging and heat storage are started, the temperature of the adsorbent is still 200 ℃ which is set at the exhaust stage, and at the moment, the return water of the heat supply network with the temperature of 30 ℃ is input into the heat exchange pipeline 12, so that the return water of the low-temperature heat supply network and the formed CO are enabled 2 The heat exchange of the adsorbent 11 reduces the formed CO 2 The temperature of the adsorbent 11 and the temperature of the return water of the heat supply network rise simultaneously, the heated return water of the heat supply network can be used for heat supply of the heat supply network, and the temperature of the adsorbent is reduced, so that the CO of the adsorbent can be increased 2 Adsorption capacity;
further, the heat will be generatedThe network backwater is input into the heat pump 5, the heat pump high-temperature hot water and the heat pump low-temperature cold water are obtained through the heat pump 5, the heat pump low-temperature cold water with the temperature of 5 ℃ is input into the heat exchange pipeline 12, the temperature in the gas storage tank is rapidly reduced, and the residual CO in the tank body is enabled to be reduced 2 The gas is further adsorbed, in the process of inflation, the air inlet valve 13 is opened firstly, when the pressure in the gas storage tank shell 1 is enabled to be micro-positive pressure 0.01bar, then the opening degree of the air inlet valve 13 is controlled, and the micro-positive pressure in the gas storage tank shell 1 is maintained; when forming CO 2 The adsorbent has a temperature lower than 298K and can be filled with 2800L of CO 2 And (5) stopping inflating the gas to finish the process of inflating and storing heat.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. The direct contact type gas-heat CO-storage device is characterized by comprising a gas storage tank shell (1), wherein molded CO is arranged in the gas storage tank shell (1) 2 Adsorbent (11), the shaped CO 2 The adsorbent (11) is internally provided with a pore passage (111), two ends of the pore passage (111) are connected with a heat exchange pipeline (12), and fluid is suitable for passing through the heat exchange pipeline (12) and the pore passage (111) and the formed CO 2 The adsorbent (11) exchanges heat, and an air inlet valve (13) and an air outlet valve (14) are respectively arranged on two sides of the air storage tank shell (1).
2. A direct contact gas and heat sharing apparatus according to claim 1, wherein the inlet valve (13) and the outlet valve (14) are pressure controlled valves.
3. A direct contact gas-heat co-storage device according to claim 1, further comprising a heat storage tank (2) and a cold storage tank (3), said heat storage tank (2) and said cold storage tank (3) being adapted to exchange heat with a fluid in said heat exchange conduit (12).
4. A direct-contact gas-heat co-storage device according to claim 3, wherein the heat exchange medium in the heat storage tank (2) and the cold storage tank (3) is molten salt.
5. An energy storage system, comprising a direct contact gas-thermal storage device according to any one of claims 1-4 and a heat network.
6. Energy storage system according to claim 5, characterized in that it further comprises a heat exchanger (4), through which heat exchanger (4) the heat storage tank (2) or the cold storage tank (3) exchanges heat with the fluid in the heat exchange conduit (12).
7. Energy storage system according to claim 5, further comprising a heat pump (5), wherein return water of the heat network in the heat network is adapted to be converted into a low-temperature fluid or a high-temperature fluid by the heat pump (5).
8. The energy storage system of claim 5, wherein the direct contact gas-heat co-storage device is charged and discharged with a change in heat generated by the low or high temperature fluid in the heat network.
9. The energy storage system of claim 8, wherein when the exhaust is needed, the high-temperature fluid in the heat supply network is input into the direct-contact gas-heat CO-storage device for heat exchange, so that the formed CO is formed 2 CO in the adsorbent (11) 2 Gas is discharged after desorption, and simultaneously the CO is formed 2 The adsorbent (11) stores adsorption heat and sensible heat of the adsorbent.
10. The energy storage system of claim 8, wherein when charging is required, cryogenic fluid in the heat supply network is fed into the direct contact gas-heat CO-storage device for heat exchange, and CO is fed simultaneously 2 Gas, make CO shaped 2 The adsorbent (11) adsorbs the CO fed in 2 Gases produced in the processAnd after the adsorption heat and sensible heat of the adsorbent are brought out by the cryogenic fluid, heat is supplied through the heat supply network.
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