CN218673287U - Energy storage device based on zinc sublimation and oxidation - Google Patents
Energy storage device based on zinc sublimation and oxidation Download PDFInfo
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- CN218673287U CN218673287U CN202222669249.4U CN202222669249U CN218673287U CN 218673287 U CN218673287 U CN 218673287U CN 202222669249 U CN202222669249 U CN 202222669249U CN 218673287 U CN218673287 U CN 218673287U
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- 239000011701 zinc Substances 0.000 title claims abstract description 133
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 131
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 68
- 230000003647 oxidation Effects 0.000 title claims abstract description 64
- 238000000859 sublimation Methods 0.000 title claims abstract description 35
- 230000008022 sublimation Effects 0.000 title claims abstract description 35
- 238000004146 energy storage Methods 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 163
- 239000007789 gas Substances 0.000 claims abstract description 55
- 238000005338 heat storage Methods 0.000 claims abstract description 31
- 230000001172 regenerating effect Effects 0.000 claims abstract description 26
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 20
- 239000001301 oxygen Substances 0.000 claims abstract description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000007787 solid Substances 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 238000005485 electric heating Methods 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims abstract description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 77
- 239000011787 zinc oxide Substances 0.000 claims description 39
- 238000001704 evaporation Methods 0.000 claims description 29
- 230000008020 evaporation Effects 0.000 claims description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000009825 accumulation Methods 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 description 23
- 238000000034 method Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 11
- 238000009834 vaporization Methods 0.000 description 9
- 230000008016 vaporization Effects 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000006722 reduction reaction Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000011449 brick Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 238000005191 phase separation Methods 0.000 description 3
- 238000005092 sublimation method Methods 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
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Abstract
The utility model discloses an energy storage device based on zinc sublimation and oxidation, which comprises a regenerative furnace with a heat insulation layer arranged on the outer wall; a heat storage cavity is formed in the heat storage furnace, an electric heating system is arranged in the heat storage cavity, the heat storage furnace is also provided with a feed port and a gas outlet, the feed port is used for adding solid zinc into the heat storage cavity, and the gas outlet is used for discharging zinc vapor; the gas outlet is communicated to the oxidation reactor through a zinc vapor pipeline, the oxidation reactor is provided with an oxygen inlet, a first water storage cavity is arranged on the outer layer of the oxidation reactor in a surrounding mode, the first water storage cavity is communicated with a user pipe network, and the first water storage cavity is used for absorbing reaction heat in the oxidation reactor through water to generate water vapor and providing the water vapor for the user pipe network. The utility model provides a technical scheme aims at solving the less problem of unit volume's the absorptive heat of heat accumulation carrier among the current energy storage technology.
Description
Technical Field
The utility model relates to an energy storage technology field, concretely relates to energy memory based on zinc sublimation and oxidation.
Background
With the rapid development of the modernization of the Chinese industry, the industrial electrical load is rapidly increased; on the other hand, with the increase of the living standard of people, the electric load of business and residents is increased increasingly. However, the electric load at night is significantly lower than the electric load during the daytime, regardless of the industrial use or the commercial or residential use. The power demand imbalance is aggravated by the increasingly large peak-valley power load difference, so that more serious impact is caused on the stable operation of a power grid and the stable supply of power; because the low ebb electricity price is lower, how to make full use of the low ebb electricity, store and effectively utilize the low ebb electricity to realize the peak clipping and valley filling of the electric wire netting, is the problem that needs to be solved at present.
The electric energy is converted into heat energy for energy storage at the off-peak electricity time period at night, and the energy storage mode is novel. In this kind of energy storage mode, the heat energy exchange who will store through the mode of heat transfer daytime comes out and utilizes to improve the low ebb electricity utilization ratio.
On the other hand, as the development speed of the power grid and the development speed of the renewable energy power generation amount cannot be well matched, when the supply is larger than the demand, a part of abandoned power is generated. Therefore, how to store the abandoned electricity and provide energy for the peak time is a solution way to adopt a more efficient energy storage mode besides further developing the national grid technology.
In the prior art, water is often used as a heat storage carrier, and during off-peak electricity energy storage, water is heated by a resistance wire to form water vapor to store energy, and the energy storage mode has the defect that the heat absorbed by the heat storage carrier in unit volume is less. The molten salt is used as a heat storage carrier, so that the heat storage amount per unit volume can be improved to a certain extent, but the molten salt is easy to block and corrode.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an energy memory based on zinc sublimation and oxidation aims at solving the less problem of unit volume's the absorptive heat of heat accumulation carrier among the current energy storage technology.
In order to achieve the purpose, the energy storage device based on zinc sublimation and oxidation comprises a regenerative furnace, the outer wall of which is provided with a heat insulation layer;
a heat storage cavity is formed in the regenerative furnace, an electric heating system is arranged in the heat storage cavity, the regenerative furnace is also provided with a feed port and a gas outlet, the feed port is used for adding solid zinc into the heat storage cavity, and the gas outlet is used for discharging zinc vapor;
the gas outlet is communicated to an oxidation reactor through a zinc vapor pipeline, the oxidation reactor is provided with an oxygen inlet, a first water storage cavity is arranged on the outer layer of the oxidation reactor in a surrounding mode, the first water storage cavity is used for being communicated with a user pipe network, and the first water storage cavity is used for absorbing reaction heat in the oxidation reactor through water to generate water vapor and providing the water vapor for the user pipe network; the first water storage cavity is connected with a steam drum.
Preferably, the oxidation reactor is in communication with a cyclone, which is in communication with a zinc oxide storage tank for collecting zinc oxide.
Preferably, the gas outlet is also communicated to a first evaporation chamber through a zinc vapor pipeline, a second water storage cavity is arranged around the outer layer of the first evaporation chamber and is used for being communicated with a user pipe network, and the second water storage cavity is used for exchanging heat with the zinc vapor through water to generate water vapor and providing the water vapor for the user pipe network; the second water storage cavity is connected with a steam drum.
Preferably, the zinc vapor pipeline comprises a main pipe, a first branch pipe and a second branch pipe, one end of the main pipe is communicated with the gas outlet, the other end of the main pipe is communicated with an inlet of a flow divider, a first outlet of the flow divider is communicated with one end of the first branch pipe, and the other end of the first branch pipe is communicated with the oxidation reactor; and a second outlet of the flow divider is communicated with one end of the second branch pipe, and the other end of the second branch pipe is communicated with the first evaporation chamber.
Preferably, the gas discharged from the cyclone separator is introduced into a second evaporation chamber, a third water storage cavity is surrounded on the outer layer of the second evaporation chamber, and the third water storage cavity is used for exchanging heat with water entering the third water storage cavity to recover heat or is used for being communicated with a user pipe network to provide steam for the user pipe network.
Preferably, the first water storage cavity, the second water storage cavity and the third water storage cavity are respectively provided with a water inlet, the water inlets are connected to a water source through water inlet pipes, and the water inlet pipes are provided with first pump equipment.
Preferably, at least one of the first, second and third impoundment chambers is connected to a water vapour storage tank by a conduit.
Preferably, the regenerative furnace is provided with a regenerative furnace outlet, the feeding port and the gas outlet are respectively arranged at the top of the regenerative furnace, and the regenerative furnace outlet is arranged at the bottom of the regenerative furnace.
Preferably, the first water storage cavity, the second water storage cavity and the third water storage cavity are respectively provided with a water outlet, the water outlets are connected to a water source through a water outlet pipe, and the water outlet pipe is provided with second pump equipment.
Preferably, the feed inlet of the regenerative furnace is also used for feeding carbon and the zinc oxide, and the gas outlet is also used for discharging gas obtained by the reaction of the zinc oxide and the carbon.
The technical scheme of the utility model among, in the low ebb electricity period, heat up to more than 907 ℃ of zinc sublimation temperature in with the regenerator through electric heating system, then drop into the zinc material in to the regenerator through the dog-house to close the dog-house, make the zinc material sublime into zinc vapour in the regenerator, the zinc material heat absorption in the sublimation process, in order to turn into the heat energy in the zinc vapour with the low-price electric energy of low ebb electricity period. During normal electricity utilization period, high-temperature zinc vapor is conveyed to the oxidation reactor through the gas outlet, and oxygen is input into the oxidation reactor through the oxygen inlet, so that the zinc vapor and the oxygen react in the oxidation reactor to generate zinc oxide. The process of generating zinc oxide is a heat release process, so that the released heat and the heat of the unreacted zinc vapor can be transferred to the water in the first water storage cavity, and the water is converted into high-temperature water vapor to be conveyed to a user pipe network. In the process of converting the electric energy in the valley electricity stage into the heat energy, compared with the zinc and the water in the same volume, the sublimation heat absorbed by the zinc and the oxidation heat released by the zinc are more than twenty times of the heat absorbed by the water vaporization (the sublimation heat per kilogram of the zinc is 2003.36kJ, the oxidation heat per kilogram of the zinc is 5355kJ, the water vaporization heat is 2260kJ/kg, and the density of the zinc is about 7.14 times of that of the water). Therefore, the energy storage mode of zinc sublimation among this technical scheme is favorable to avoiding the less problem of the heat that the heat accumulation carrier of unit volume absorbs among the current energy storage technology.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram in an embodiment of the energy storage device based on zinc sublimation and oxidation.
The reference numbers illustrate:
1-a water source; 2-a first pump device; 3-a regenerative furnace; 31-a feeding port; 32-a gas outlet; 33-regenerator outlet; 4-resistance heating wire; 5-zinc material; 6-a first evaporation chamber; 61-first reservoir chamber inlet; 62-a first water outlet; 63-a water vapor outlet; 64-a gas inlet; 65-a second reservoir chamber; 66-zinc outlet; 7-a user pipe network; 8-a water vapor storage tank; 9-a cyclone separator; 10-a zinc oxide storage tank; 11-an oxidation reactor; 111-oxygen inlet; 112-a first reservoir chamber; 113-a second water outlet; 12-second pump means.
The purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, in order to achieve the above object, the energy storage device based on zinc sublimation and oxidation according to the present invention includes a regenerator 3 having an insulating layer on an outer wall;
a heat storage cavity is formed in the regenerative furnace 3, an electric heating system is arranged in the heat storage cavity, the regenerative furnace 3 is further provided with a feed port 31 and a gas outlet 32, the feed port 31 is used for adding solid zinc into the heat storage cavity, and the gas outlet 32 is used for discharging zinc vapor;
the gas outlet 32 is communicated to the oxidation reactor 11 through a zinc vapor pipeline, the oxidation reactor 11 is provided with an oxygen inlet 111, a first water storage cavity 112 is surrounded on the outer layer of the oxidation reactor 11, the first water storage cavity 112 is used for being communicated with a user pipe network, and the first water storage cavity 112 is used for absorbing reaction heat in the oxidation reactor 11 through water to generate water vapor and providing the water vapor for the user pipe network; the first water storage chamber is connected with a steam drum (not shown).
The technical scheme of the utility model, in the low ebb electricity period, heat up to more than 907 ℃ of zinc sublimation temperature in with regenerator 3 through electric heating system, then drop into zinc material 5 in to regenerator 3 through dog-house 31, and close dog-house 31, make zinc material 5 sublime into the zinc vapour in regenerator 3, sublimation in-process zinc material 5 absorbs heat, turn into the heat energy in the zinc vapour with the low-priced electric energy of low ebb electricity period. During normal electricity usage periods, high-temperature zinc vapor is transported to the oxidation reactor 11 through the gas outlet 32, and oxygen is input into the oxidation reactor 11 through the oxygen inlet 111, so that the zinc vapor reacts with the oxygen in the oxidation reactor 11 to produce zinc oxide. The process of generating zinc oxide is an exothermic process, so that the released heat and the heat of the unreacted zinc vapor itself can be transferred to the water in the first water storage cavity 112, so that the water is converted into high-temperature water vapor and is conveyed to the user pipe network. In the process of converting the electric energy in the valley electricity stage into the heat energy, compared with the zinc and the water in the same volume, the sublimation heat absorbed by the zinc and the oxidation heat released by the zinc are more than twenty times of the heat absorbed by the water vaporization (the sublimation heat per kilogram of the zinc is 2003.36kJ, the oxidation heat per kilogram of the zinc is 5355kJ, the water vaporization heat is 2260kJ/kg, and the density of the zinc is about 7.14 times of that of the water). Therefore, the zinc sublimation energy storage mode in the technical scheme is favorable for avoiding the problem that the heat absorbed by the heat storage carrier with unit mass in the existing energy storage technology is less.
Specifically, the chemical reaction formula in the oxidation reactor is as follows: 2Zn O 2 =2ZnO. Wherein Zn is zinc vapor, and the oxidation reaction product is zinc oxide crystal.
Taking the prior art that the temperature of 1kg of water is raised from 20 ℃ to 100 ℃ by heating up to 80 ℃ together, the heat absorbed in the vaporization process is 2596kJ (the sum of the vaporization latent heat and the specific heat of water, the vaporization heat of water is 2260kJ/kg, the heat absorption of steam of 1kg of water from 20 ℃ of water to 100 ℃ of water is about 80 x 4.2+2260= 2596kJ), and the heat absorbed by sublimation of 1kg of solid zinc is 2000kJ, so that the heat absorbed by sublimation of zinc in the same mass is 0.77 times (about 2000/2596=0.77 times) of the heat absorbed by vaporization of water, but the volume occupied by zinc is greatly reduced because the density difference is higher than 7 times. Besides the energy storage mode of water vaporization heat absorption, the heat storage of the magnesia heat storage brick is also a common energy storage mode, 1 kilogram of the magnesia heat storage brick is heated to 750 ℃ through a resistance wire, the absorbed heat is 1095kJ, and the absorbed heat of the same mass of zinc sublimation is 1.8 times of the absorbed heat of the magnesia heat storage brick.
The electrical heating system may be embodied as a number of resistance heating wires 4. The steam drum can be embodied as a horizontal tank for storing water vapor, which is used as a buffer device for adjusting the water vapor and the water vapor, and is used for buffering when the amount of the steam is large.
In addition, the process of reacting zinc vapor with oxygen to form zinc oxide in oxidation reactor 11 is an exothermic process, which allows the energy storage system to receive more heat to provide more water vapor during normal electricity usage periods.
Further, a zinc vapor storage tank may be provided between the regenerator 3 and the oxidation reactor 11.
Preferably, the oxidation reactor 11 is in communication with a cyclone 9, the cyclone 9 being in communication with a zinc oxide storage tank 10 for collecting zinc oxide. Specifically, the zinc oxide dust obtained after the oxidation reaction can be collected into the zinc oxide storage tank 10 by the cyclone separator 9.
More preferably, the gas outlet 32 is further communicated to the first evaporation chamber 6 through a zinc vapor pipeline, a second water storage cavity 65 is surrounded on the outer layer of the first evaporation chamber 6, the second water storage cavity 65 is used for communicating with a user pipe network, and the second water storage cavity 65 is used for generating water vapor through heat exchange between water and the zinc vapor and providing the water vapor to the user pipe network; the second water storage cavity is connected with a steam drum.
This example serves to provide another way of preparing water vapor during normal electricity usage periods: high-temperature zinc vapor is transmitted to the first evaporation chamber 6 through the gas outlet 32, the zinc vapor transfers heat to water in the second water storage cavity 65 in the first evaporation chamber 6, so that the water is converted into the high-temperature water vapor and is conveyed to a user pipe network or is stored in the water vapor storage tank 8, and the zinc vapor in the first evaporation chamber 6 is gradually cooled to form liquid zinc or solid zinc.
Further, the zinc vapor pipeline includes a main pipe, a first branch pipe and a second branch pipe, one end of the main pipe is communicated with the gas outlet 32, the other end of the main pipe is communicated with an inlet of a flow divider, a first outlet of the flow divider is communicated with one end of the first branch pipe, and the other end of the first branch pipe is communicated with the oxidation reactor 11; and a second outlet of the flow divider is communicated with one end of the second branch pipe, and the other end of the second branch pipe is communicated with the first evaporation chamber 6.
Specifically, the flow dividing valve is used for adjusting the flow rates of the first branch pipe and the second branch pipe in equal proportion, or adjusting the flow rates of the first branch pipe and the second branch pipe according to a set proportion, so that the flow rate of the zinc vapor flowing into the oxidation reactor 11 and the first evaporation chamber 6 is controlled.
Preferably, the gas discharged from the cyclone separator 9 is introduced into a second evaporation chamber (not shown), and a third water storage cavity (not shown) is surrounded on the outer layer of the second evaporation chamber, and the third water storage cavity is used for exchanging heat with water entering the third water storage cavity for heat recovery or is used for being communicated with a user pipe network to provide water vapor for the user pipe network. Because the oxidation reactor 11 obtains reaction heat, after heat exchange with water, the gas discharged into the cyclone separator 9 from the oxidation reactor 11 has higher temperature, a thermometer can be arranged at the outlet of the cyclone separator 9, and when the temperature of the gas discharged from the cyclone separator 9 is higher, the gas can be continuously introduced into the second evaporation chamber to exchange heat with water to prepare water vapor. The third water storage cavity can also be provided with a steam drum.
Preferably, the first reservoir chamber 112, the second reservoir chamber 65 and the third reservoir chamber are provided with a water inlet, respectively, which is connected to the water source 1 via a water inlet pipe provided with the first pump device 2. Wherein the water inlets may be arranged at the top of the first reservoir chamber 112, the second reservoir chamber 65 and the third reservoir chamber, respectively.
Further, at least one of the first reservoir chamber 112, the second reservoir chamber 65 and the third reservoir chamber is connected to the water vapor storage tank 8 through a pipe. The steam storage tank 8 is used for storing steam which cannot be consumed temporarily by a user pipe network, and valves can be respectively arranged on pipelines between each water storage cavity and the steam storage tank 8.
Preferably, the regenerative furnace 3 is provided with a regenerative furnace outlet 33, the feeding port 31 and the gas outlet 32 are respectively provided at the top of the regenerative furnace 3, and the regenerative furnace outlet 33 is provided at the bottom of the regenerative furnace 3. Wherein the residual slag after zinc sublimation can be periodically cleaned through the outlet 33 of the regenerative furnace.
Preferably, the first reservoir chamber 112, the second reservoir chamber 65 and the third reservoir chamber are provided with water outlets, respectively, which are connected to the water source 1 by a water outlet pipe provided with the second pump device 12. A filter may be provided between the second pump device 12 and the water source 1 to remove impurities.
Preferably, the first evaporation chamber 6 is provided with a zinc outlet 66. Liquid zinc or solid zinc in the regenerator 3 can be discharged from the zinc outlet 66, and the solid zinc after cooling can be fed into the regenerator 3 from the feed inlet 31 for recycling. Likewise, the second evaporation chamber may be provided with a discharge opening for taking out the cooled material therefrom.
As a further development of the utility model, the charging opening 31 of the regenerative furnace 3 is also used for inputting carbon and zinc oxide, and the gas outlet 32 is also used for discharging the gas obtained by the reaction of zinc oxide and carbon. In this embodiment, the zinc oxide obtained by the reaction in the oxidation reactor 11 is charged into the regenerator 3 to undergo a reduction reaction. The reaction equation is: znO + C = Zn + CO ≠ C.
Specifically, after the extension scheme has been increased, the technical scheme of the utility model can be carried out through following mode:
in the first stage, in the off-peak electricity period, the temperature in the heat storage furnace 3 is raised to a temperature higher than the sublimation temperature of zinc through the electric heating system, then the zinc material 5 is put into the heat storage furnace 3 through the feed opening 31, the feed opening 31 is closed, the zinc material 5 is sublimated into zinc vapor in the heat storage furnace 3, and the zinc material 5 absorbs heat in the sublimation process so as to convert the low-price electric energy in the off-peak electricity period into the heat energy in the zinc vapor.
In the second stage, in the normal electricity utilization period, a part of high-temperature zinc vapor is transmitted to the oxidation reactor 11 through the gas outlet 32, the main pipe and the first branch pipe, and oxygen is input into the oxidation reactor 11 through the oxygen inlet 111, so that the zinc vapor and the oxygen react in the oxidation reactor 11 to generate zinc oxide, and zinc oxide particles are separated from other gases through the cyclone separator 9 (the remaining mixed gas of the zinc vapor and the oxygen is recycled through the condenser to obtain liquid zinc, the liquid zinc is condensed into solid and then can be repeatedly put into the regenerator 3 for use, and the oxygen discharged after passing through the condenser can be recycled); the other part of the high-temperature zinc vapor is transmitted to the first evaporation chamber 6 through the gas outlet 32, the main pipe and the second branch pipe, the zinc vapor transfers heat to water in the second water storage cavity 65 in the first evaporation chamber 6, so that the water is converted into the high-temperature water vapor and is transmitted to a user pipe network or is stored in the water vapor storage tank 8, and the zinc vapor in the first evaporation chamber 6 is gradually cooled to form liquid zinc or solid zinc, and can be put into the regenerative furnace 3 for recycling.
And in the third stage, collecting the zinc oxide generated in the second stage, putting the zinc oxide into the regenerative furnace 3 through the feeding port 31, putting carbon into the regenerative furnace 3 through the feeding port 31, heating the regenerative furnace 3 to 1100 ℃ through an electric heating system in the next off-peak electricity period, and performing reduction reaction on ZnO and C to obtain a mixed gas of zinc vapor and CO. The reaction is endothermic, and the electric energy in the next low valley electricity period can be stored in the endothermic reaction process, and finally zinc vapor is obtained.
A fourth stage of transferring a part of the high-temperature mixed gas obtained in the third stage to the oxidation reactor 11 through the gas outlet 32, the main pipe and the first branch pipe during the next normal power consumption period, and inputting oxygen into the oxidation reactor 11 through the oxygen inlet 111, so that zinc vapor and oxygen react in the oxidation reactor 11 to form zinc oxide, and CO is oxidized to form CO 2 The zinc oxide particles are separated from the other gases by a cyclone 9 (after separation, the remaining mixed gas may contain zinc vapor and O 2 CO and CO 2 The mixed gas is recycled by a condenser to obtain liquid zinc so as to realize two-phase separation with other gases, the gas after the two-phase separation can be combusted and discharged, the combustion heat can be further utilized in the system, and the liquid zinc can be repeatedly put into a regenerative furnace 3 for use after being condensed into solid; the other part of the high-temperature mixed gas obtained in the third stage is transmitted to the first evaporation chamber 6 through the gas outlet 32, the main pipe and the second branch pipe, the high-temperature mixed gas transfers heat to water in the second water storage cavity 65 in the first evaporation chamber 6, the water is converted into high-temperature water vapor and is conveyed to a user pipe network or is stored in the water vapor storage tank 8, the zinc vapor in the first evaporation chamber 6 is gradually cooled to form liquid zinc or solid zinc, two-phase separation is realized with CO gas, CO can be combusted and discharged, and the combustion heat can be further utilized in the system.
Zinc and zinc oxide are obtained through both the second and fourth stages, and may be repeatedly charged into the regenerator 3 during the third round off-peak period, and continue to cycle as per the methods of the third and fourth stages (when zinc and zinc oxide are simultaneously charged into the regenerator 3, zinc is directly sublimated into zinc vapor, and zinc oxide is reduced into zinc vapor). Therefore, the utility model discloses not only can be through the mode heat accumulation of zinc sublimation, simultaneously, can also absorb more heat through the process that zinc oxide reduced into zinc vapour (when zinc oxide and solid carbon took place reduction reaction, the absorbed heat was about 4515 kJ/kg).
The mode of zinc sublimation + zinc oxide reduction among this technical scheme can both utilize the electric energy in the low ebb electricity stage, and the energy storage mode that both combine in addition zinc oxidation reaction's is exothermic, is favorable to avoiding the less problem of unit volume's heat accumulation carrier absorbing heat among the current energy storage technology.
In addition, considering that the regenerator is charged with two gases of zinc vapor and CO generated by the reaction of zinc oxide and solid carbon, in order to avoid the volume of the regenerator 3 from being too large, the regenerator 3 may be pressurized to form a pressurized heat storage chamber inside.
In addition, the technical scheme can also have the following beneficial effects:
firstly, the solid zinc can remove other metal impurities in the zinc block according to the components of the solid zinc in the sublimation process, so that the purity of the zinc is improved.
Secondly, high-purity zinc oxide is prepared through reaction, and simultaneously, heat emitted by oxidation reaction can be collected and utilized.
Thirdly, the heat storage amount per unit volume of the heat storage medium can be increased by zinc sublimation and reduction of zinc oxide, and high-quality steam is obtained.
Fourthly, the saturated steam prepared in the first water storage cavity and the second water storage cavity is converted into superheated steam through a heat exchanger, and the superheated steam can be conveyed to a steam turbine for power generation after being regulated by a temperature and pressure reducing device.
The above is only the preferred embodiment of the present invention, not limiting the scope of the present invention, all of which are under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. An energy storage device based on zinc sublimation and oxidation is characterized by comprising a regenerative furnace, the outer wall of which is provided with a heat insulation layer;
a heat storage cavity is formed in the heat storage furnace, an electric heating system is arranged in the heat storage cavity, the heat storage furnace is also provided with a feed port and a gas outlet, the feed port is used for adding solid zinc into the heat storage cavity, and the gas outlet is used for discharging zinc vapor;
the gas outlet is communicated to an oxidation reactor through a zinc vapor pipeline, the oxidation reactor is provided with an oxygen inlet, a first water storage cavity is arranged on the outer layer of the oxidation reactor in a surrounding mode, the first water storage cavity is used for being communicated with a user pipe network, and the first water storage cavity is used for absorbing reaction heat in the oxidation reactor through water to generate water vapor and providing the water vapor for the user pipe network; the first water storage cavity is connected with a steam drum.
2. The zinc sublimation and oxidation based energy storage device according to claim 1, wherein the oxidation reactor is in communication with a cyclone separator, the cyclone separator being in communication with a zinc oxide storage tank for collecting zinc oxide.
3. The energy storage device based on zinc sublimation and oxidation as claimed in claim 2, wherein the gas outlet is further communicated to a first evaporation chamber through a zinc vapor pipeline, a second water storage cavity surrounds the outer layer of the first evaporation chamber, the second water storage cavity is used for being communicated with a user pipe network, and the second water storage cavity is used for generating water vapor through heat exchange between water and the zinc vapor and providing the water vapor to the user pipe network; the second water storage cavity is connected with a steam drum.
4. The zinc sublimation and oxidation based energy storage device according to claim 3, wherein the zinc vapor pipeline comprises a main pipe, a first branch pipe and a second branch pipe, one end of the main pipe is communicated with the gas outlet, the other end of the main pipe is communicated with an inlet of a flow dividing valve, a first outlet of the flow dividing valve is communicated with one end of the first branch pipe, and the other end of the first branch pipe is communicated with the oxidation reactor; and a second outlet of the flow divider is communicated with one end of the second branch pipe, and the other end of the second branch pipe is communicated with the first evaporation chamber.
5. The energy storage device based on zinc sublimation and oxidation as claimed in claim 3, wherein the gas discharged from the cyclone separator is introduced into a second evaporation chamber, a third water storage cavity surrounds the outer layer of the second evaporation chamber, and the third water storage cavity is used for exchanging heat with water entering the third water storage cavity for heat recovery or is used for communicating with a user pipe network to provide water vapor for the user pipe network.
6. The energy storage device based on zinc sublimation and oxidation as claimed in claim 5, wherein the first water storage cavity, the second water storage cavity and the third water storage cavity are provided with water inlets respectively, the water inlets being connected to a water source through a water inlet pipe, the water inlet pipe being provided with a first pump device.
7. The zinc sublimation and oxidation based energy storage device of claim 6, wherein at least one of the first reservoir chamber, the second reservoir chamber, and the third reservoir chamber is connected to a water vapor storage tank by a conduit.
8. The energy storage device based on zinc sublimation and oxidation according to any one of claims 1 to 7, wherein the regenerator is provided with a regenerator outlet, the feed port and the gas outlet are respectively provided at the top of the regenerator, and the regenerator outlet is provided at the bottom of the regenerator.
9. The energy storage device based on zinc sublimation and oxidation as claimed in claim 6 or 7, wherein the first water storage cavity, the second water storage cavity and the third water storage cavity are respectively provided with a water outlet, the water outlets are connected to a water source through a water outlet pipe, and the water outlet pipe is provided with a second pump device.
10. The energy storage device based on zinc sublimation and oxidation according to any one of claims 2 to 7, wherein the feed inlet of the regenerator is further used for feeding carbon and the zinc oxide, and the gas outlet is further used for discharging gas obtained by reaction of the zinc oxide and the carbon.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115863851A (en) * | 2022-12-01 | 2023-03-28 | 西藏康盛能源开发有限公司 | Energy storage device based on zinc sublimation and oxidation and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115863851A (en) * | 2022-12-01 | 2023-03-28 | 西藏康盛能源开发有限公司 | Energy storage device based on zinc sublimation and oxidation and control method thereof |
| CN115863851B (en) * | 2022-12-01 | 2023-10-10 | 茂炜能源股份有限公司 | Energy storage device based on zinc sublimation and oxidation and control method thereof |
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Effective date of registration: 20240708 Address after: No. 6, 10th Floor, Building 9, No. 399, West Section of Fucheng Avenue, Chengdu High tech Zone, China (Sichuan) Pilot Free Trade Zone, Chengdu City, Sichuan Province, 610000 Patentee after: Maowei Energy Co.,Ltd. Country or region after: China Address before: 851400 No. 5-2, unit 3, building 1, zone a, sunshine new town, 158 Jinzhu West Road, Lhasa, Tibet Autonomous Region Patentee before: Tibet Kangsheng Energy Development Co.,Ltd. Country or region before: China |