CN106524809A - Gradient energy storage and energy release system and method based on reversible chemical reaction - Google Patents
Gradient energy storage and energy release system and method based on reversible chemical reaction Download PDFInfo
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- CN106524809A CN106524809A CN201611092097.9A CN201611092097A CN106524809A CN 106524809 A CN106524809 A CN 106524809A CN 201611092097 A CN201611092097 A CN 201611092097A CN 106524809 A CN106524809 A CN 106524809A
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- 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
- F28D20/003—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using thermochemical reactions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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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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- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The invention discloses a gradient energy storage and energy release system and a method based on a reversible chemical reaction. The system comprises a solar tower, a heat absorber, a heat absorbing working medium capable of resisting high temperature, a high-temperature reversible thermal chemical reaction system, a medium-temperature reversible thermal chemical reaction system, a low-temperature reversible thermal chemical reaction system, a water working medium and a generator set. The system realizes storage of solar energy and reverse heat release through serially connecting the high-temperature reversible thermal chemical reaction system, the medium-temperature reversible thermal chemical reaction system and the low-temperature reversible thermal chemical reaction system, and has the characteristics of high energy storage density, full heat energy absorption and capability of preserving energy for a long time. The system provides a new method to a solar thermal power generation energy storage mode, and has important significance on solar heat utilization and solar-driven chemical reactions.
Description
Technical field
The invention belongs to solar thermal utilization and heat chemistry field, and in particular to a kind of step based on reversible chemical reaction
Energy storage is with release can system and method.
Background technology
In recent years, tower type solar energy thermal power generation technology and corresponding industry have stepped into fast-developing road.With western class
The large-sized solar thermal power station such as the PS10/PS20 and Gemasolar of tooth, U.S. Ivanpah, the Delingha of China build up and
Successfully realize being incorporated into the power networks, the business-like process of tower type solar energy thermal power generation technology enters a brand-new height.But, although
Solar energy has the advantages that widely distributed, resource is huge and never exhausted, but while it is also discontinuous, thus to realize
Solar heat power generation system continuously generates electricity, it is necessary to be equipped with a set of energy-storage system.When having the sun, heat sink solar energy, heat energy
A portion energy is used for heat generating by induction system, and another part energy storage is in energy-storage system.When no sun,
Energy-storage system discharges heat energy, maintains electricity generation system to work on.
At present, the energy storage mode in solar power station is essentially divided into sensible heat storage and phase transformation stores two kinds, and they are all
Solar energy is stored in the form of heat energy.Both energy storage modes are primarily present two shortcomings：One is that energy storage density is relatively low,
Generally less than 0.1kWh/kg, especially sensible heat storing mode, even more less than 0.03kWh/kg, this causes energy storage system to energy storage density
The rather voluminous of system, not only took up space but also consumed cost；Two is to be difficult to long-time to preserve energy, as energy is stored up with form of thermal energy
Deposit, the temperature of heat reservoir is high with respect to external environment, then heat energy slowly can be passed in external environment over time, the time one
Long, the big energy of heat reservoir can all be lost.And based on reversible chemical reaction chemistry storage be using the endothermic reaction come
Carry out energy storage, using exothermic reaction (back reaction) carrying out heat release, energy storage density is generally higher than 0.5kWh/kg, and product
Can preserve for a long time at normal temperatures.This energy storage mode compares sensible heat storage and phase transformation storage, high with energy storage density, can be long-term
The advantages of storage, therefore obtain the abundant concern of domestic and international researcher.
Solar energy is stored using chemical energy storage mode and still should be noted that a problem, i.e. chemical reaction need to maintain one
Specific temperature range fully could be carried out, and this temperature range often very little, and this causes the high temperature endothermic from heat extractor out
Working medium is just sent back to heat extractor again not sufficiently cooled, on the one hand heat can not be passed to energy-storage system, the opposing party fully
Face also reduces the efficiency of heat extractor.
The content of the invention
It is an object of the invention to provide a kind of step energy storage based on reversible chemical reaction with release can system and method, with
The defect for overcoming above-mentioned prior art to exist, the present invention is by high-temperature and reversible thermal chemical reaction system, the reversible transconversion into heat of middle temperature of connecting
Response system, low-temp reversible thermal chemical reaction system are learned, the storage to solar energy is realized and is reversely released energy heat release, lift energy storage
Density, and guarantee to fully absorb heat, do not lose the efficiency of heat extractor.
To reach above-mentioned purpose, the present invention is adopted the following technical scheme that：
A kind of step energy storage based on reversible chemical reaction with release can system, including equipped with heat absorption working medium heat extractor, inhale
The delivery outlet of hot device is connected to the heat absorption working medium input of high-temperature and reversible thermal chemical reaction system, high-temperature and reversible thermal chemical reaction system
The heat absorption working medium outfan of system is connected to the heat absorption working medium input of the reversible thermal chemical reaction system of high temperature, and high temperature can backheating
The heat absorption working medium outfan of chemical reaction system is connected to the heat absorption working medium input of low-temp reversible thermal chemical reaction system, low temperature
The heat absorption working medium outfan of reversible thermal chemical reaction system is connected to heat extractor input port；
Also include the generating set promoted by device of working medium, it is anti-that the delivery outlet of generating set is connected to low-temp reversible heat chemistry
The device of working medium outfan of the device of working medium input of system, low-temp reversible thermal chemical reaction system is answered to be connected to high-temperature and reversible heat chemistry
The device of working medium input of response system, the device of working medium outfan of high-temperature and reversible thermal chemical reaction system are connected to high-temperature and reversible transconversion into heat
The device of working medium input of response system is learned, the device of working medium outfan of high-temperature and reversible thermal chemical reaction system is connected to generating set
Input port.
Further, heat extractor bottom is provided with solar tower.
Further, described heat extractor is cavity type heat absorber or external cylinder heat extractor.
Further, described high-temperature and reversible thermal chemical reaction system includes the CH of some series connection4+CO2/CO+H2Can be converse
Answer system.
Further, the reversible thermal chemical reaction system of described high temperature includes the C of some series connection6H12/C6H6+H2It is reversible
Reaction system.
Further, described low-temp reversible thermal chemical reaction system includes the MgH of some series connection2/Mg+H2Reversible reaction
System.
A kind of step energy storage based on reversible chemical reaction with release can method, comprise the following steps：
Energy storage：
Step one, initially enters high-temperature and reversible thermal chemical reaction system from the delivery outlet of heat extractor high temperature endothermic working medium out
System, drives high-temperature and reversible thermal chemical reaction system to carry out the endothermic reaction, and by high temperature endothermic working medium, the heat energy of itself is converted to high temperature
The chemical energy of reversible thermal chemical reaction system, makes the temperature of heat absorption working medium be reduced to high temperature；
Step 2, the high temperature heat absorption working medium flowed out from high-temperature and reversible thermal chemical reaction system enter the reversible transconversion into heat of high temperature
Response system is learned, drives the reversible thermal chemical reaction system of high temperature to carry out the endothermic reaction, the heat of working medium itself that high temperature is absorbed heat
The chemical energy of the reversible thermal chemical reaction system of high temperature can be converted to, makes the temperature of heat absorption working medium be reduced to low temperature；
Step 3, the low temperature heat absorption working medium that therefrom high-temperature and reversible thermal chemical reaction system flows out enter low-temp reversible heat chemistry
Response system, drives low-temp reversible thermal chemical reaction system to carry out the endothermic reaction, the heat energy conversion of working medium itself that low temperature is absorbed heat
For the chemical energy of low-temp reversible thermal chemical reaction system, the temperature of working medium of absorbing heat further is reduced；
Release energy：
Step one, device of working medium initially enter low-temp reversible thermal chemical reaction system, and low-temp reversible thermal chemical reaction system is entered
The chemical energy of low-temp reversible thermal chemical reaction system is converted to heat energy, and carries out heat exchange, water with device of working medium by row exothermic reaction
Working medium absorbs the heat energy released by low-temp reversible thermal chemical reaction system, and temperature is increased to saturation temperature, and produces water vapour；
Step 2, the device of working medium flowed out from low-temp reversible thermal chemical reaction system enter the reversible thermal chemical reaction system of high temperature
System, the reversible thermal chemical reaction system of high temperature carry out exothermic reaction, and the chemical energy of high temperature reversible thermal chemical reaction system is turned
Heat energy being changed to, and heat exchange being carried out with device of working medium, device of working medium absorbs the heat energy released by the reversible thermal chemical reaction system of high temperature,
More water vapour are produced further；
Step 3, the device of working medium that therefrom high-temperature and reversible thermal chemical reaction system flows out enter high-temperature and reversible thermal chemical reaction system
System, high-temperature and reversible thermal chemical reaction system carry out exothermic reaction, the chemical energy of high-temperature and reversible thermal chemical reaction system are converted to
Heat energy, and heat exchange is carried out with device of working medium, device of working medium absorbs the heat energy released by high-temperature and reversible thermal chemical reaction system, was formed
Hot water and steam, flows to generating set afterwards and is generated electricity.
Further, described high-temperature and reversible thermal chemical reaction system includes the CH of some series connection4+CO2/CO+H2Can be converse
Answer system.
Further, the reversible thermal chemical reaction system of described high temperature includes the C of some series connection6H12/C6H6+H2It is reversible
Reaction system.
Further, described low-temp reversible thermal chemical reaction system includes the MgH of some series connection2/Mg+H2Reversible reaction
System.
Compared with prior art, the present invention has following beneficial technique effect：
Present system is by high-temperature and reversible thermal chemical reaction system, the reversible thermal chemical reaction system of middle temperature, the low temperature of connecting
Reversible thermal chemical reaction system, realizes the storage to solar energy, and reversely releases energy heat release, be the energy storage side of solar energy thermal-power-generating
Formula provides new thinking, while the present invention adopts chemical mode energy storage, compares heat accumulation mode energy storage, and its energy storage density is big, can
The volume of energy-storage system is efficiently reduced, and the energy of energy storage is easier long-term preservation；Using step energy storage technology, Neng Gouchong
Divide ground that the energy of heat absorption working medium is passed to energy-storage system, make heat extractor that there is higher efficiency.
Further, CH of the present invention4+CO2/CO+H2The C of reversible reaction system, middle temperature6H12/C6H6+H2It is reversible
The MgH of reaction system and low temperature2/Mg+H2Reversible reaction system is all highly endothermic and strong exothermal reaction system, is adapted to be used as chemistry
The medium of energy storage.
Reversible chemical reaction system of the inventive method by combination different brackets reaction temperature, to realize the storage of gradin
Be able to can act on releasing, heat absorption working medium flows through the reversible thermal chemical reaction system of high-temperature and reversible thermal chemical reaction system, high temperature successively
With low-temp reversible thermal chemical reaction system, high-temperature and reversible thermal chemical reaction system, the reversible thermal chemical reaction system of high temperature are driven
The endothermic reaction is carried out with low-temp reversible thermal chemical reaction system, and then carries out energy storage；Then device of working medium passes sequentially through low-temp reversible
The reversible thermal chemical reaction system of thermal chemical reaction system, high temperature and high-temperature and reversible thermal chemical reaction system, drive low-temp reversible
The reversible thermal chemical reaction system of thermal chemical reaction system, high temperature and high-temperature and reversible thermal chemical reaction system carry out exothermic reaction,
Overheated steam is formed, generating set is then flowed to and is generated electricity, carry out completing to release energy, the inventive method is stored up using chemical mode
Can, heat accumulation mode energy storage is compared, its energy storage density is big, can efficiently reduce the volume of energy-storage system, and the energy of energy storage
It is easily long-term to preserve；Using step energy storage technology, the energy of heat absorption working medium can be passed to into energy-storage system fully, make heat absorption
Utensil has higher efficiency.
Description of the drawings
Fig. 1 is the schematic diagram of the step energy storage based on reversible chemical reaction of the present invention；
Fig. 2 is the schematic diagram that energy is released based on the step of reversible chemical reaction of the present invention；
Fig. 3 is the instance graph of the step energy storage based on reversible chemical reaction of the present invention；
Fig. 4 is the instance graph that energy is released based on the step of reversible chemical reaction of the present invention；
Wherein, 1, solar tower；2nd, heat extractor；3rd, high-temperature and reversible thermal chemical reaction system；4th, the reversible heat chemistry of high temperature is anti-
Answer system；5th, low-temp reversible thermal chemical reaction system；6th, heat absorption working medium；7th, device of working medium；8th, generating set；9、CH4+CO2/CO+H2
Reversible reaction system；10、C6H12/C6H6+H2Reversible reaction system；11、MgH2/Mg+H2Reversible reaction system；12nd, air.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail：
As depicted in figs. 1 and 2, a kind of step energy storage based on reversible chemical reaction with release can system, including solar tower 1,
Heat extractor 2, can it is resistant to elevated temperatures heat absorption working medium 6, the reversible thermal chemical reaction system 4 of high-temperature and reversible thermal chemical reaction system 3, middle temperature,
Low-temp reversible thermal chemical reaction system 5, device of working medium 7 and generating set 8.Described heat extractor 2 is cavity type heat absorber or external
Formula cylinder heat extractor；The described reversible thermal chemical reaction system 4 of high-temperature and reversible thermal chemical reaction system 3, middle temperature and low-temp reversible
Thermal chemical reaction system 5 is highly endothermic and strong exothermal reaction, heat absorption working medium pipeline successively will be described high-temperature and reversible heat chemistry anti-
The reversible thermal chemical reaction system 4 of system 3, middle temperature and low-temp reversible thermal chemical reaction system 5 is answered to be connected in series.Specially：It is described
Heat absorption working medium 6 be heated to form high temperature in described heat extractor 2, flow to described high-temperature and reversible thermal chemical reaction system afterwards
3, the delivery outlet of described heat extractor 2 is connected with the temperature end of described high-temperature and reversible thermal chemical reaction system 3, described high temperature
The temperature end of the reversible thermal chemical reaction system of the low-temperature end of reversible thermal chemical reaction system 3 and described middle temperature 4 is connected, described
The low-temperature end of the reversible thermal chemical reaction system of middle temperature 4 is connected with the temperature end of described low-temp reversible thermal chemical reaction system 5, institute
The low-temperature end of the low-temp reversible thermal chemical reaction system 5 stated is connected with the input port of described heat extractor 2, and combination different brackets is anti-
The reversible chemical reaction system of temperature is answered, to realize the energy storage of gradin and release acting on.Specific thermal energy storage process includes following
Step：
(1) the high temperature endothermic working medium flowed out from the delivery outlet of described heat extractor 2 initially enters described high-temperature and reversible heat
Chemical reaction system 3, drives described high-temperature and reversible thermal chemical reaction system 3 to carry out the endothermic reaction, by the suction described in high temperature
The heat energy of hot working fluid itself is converted to the chemical energy of described high-temperature and reversible thermal chemical reaction system 3, described heat absorption working medium
Temperature is reduced to high temperature.
(2) the heat absorption working medium described in the high temperature from the described outflow of high-temperature and reversible thermal chemical reaction system 3 enters institute
The reversible thermal chemical reaction system 4 of high temperature stated, drive the reversible thermal chemical reaction system of described high temperature 4 carry out absorbing heat it is anti-
Should, the heat absorption working medium heat energy of itself described in high temperature is converted to described in the reversible thermal chemical reaction system of high temperature 4
Chemical energy, the temperature of described heat absorption working medium are reduced to low temperature.
(3) the heat absorption working medium described in the low temperature from the described reversible outflow of thermal chemical reaction system 4 of high temperature enters institute
The low-temp reversible thermal chemical reaction system 5 stated, drives described low-temp reversible thermal chemical reaction system 5 to carry out the endothermic reaction, will
The described heat absorption working medium heat energy of itself of low temperature is converted to the chemical energy of described low-temp reversible thermal chemical reaction system 5, institute
The temperature of the heat absorption working medium stated further is reduced.
Specific exoergic process is comprised the following steps：
(1) device of working medium 7 described in initially enters described low-temp reversible thermal chemical reaction system 5.Described low-temp reversible
Thermal chemical reaction system 5 carries out exothermic reaction (back reaction), and the chemical energy of described low-temp reversible thermal chemical reaction system 5 is turned
Heat energy is changed to, and heat exchange is carried out with described device of working medium.Described device of working medium absorbs described low-temp reversible thermal chemical reaction
The heat energy released by system 5, temperature are increased to saturation temperature, and produce water vapour.
(2) described high temperature is entered from the device of working medium described in the described outflow of low-temp reversible thermal chemical reaction system 5
Reversible thermal chemical reaction system 4.The reversible thermal chemical reaction system of described high temperature 4 carries out exothermic reaction (back reaction), by institute
The chemical energy of the reversible thermal chemical reaction system of the high temperature stated 4 is converted to heat energy, and carries out heat exchange with described device of working medium.Institute
The device of working medium stated absorbs the heat energy released by the reversible thermal chemical reaction system of described high temperature 4, further produces more water
Steam (or the device of working medium described in whole is converted into water vapour by liquid water).
(3) described high temperature is entered from the device of working medium described in the described reversible outflow of thermal chemical reaction system 4 of high temperature
Reversible thermal chemical reaction system 3.Described high-temperature and reversible thermal chemical reaction system 3 carries out exothermic reaction (back reaction), will be described
The chemical energy of high-temperature and reversible thermal chemical reaction system 3 be converted to heat energy, and carry out heat exchange with described device of working medium.Described
Device of working medium absorbs the heat energy released by described high-temperature and reversible thermal chemical reaction system 3, forms superheated vapour, flows to institute afterwards
The generating set 8 stated is generated electricity.
The present invention absorbs the heat energy of described heat absorption working medium 6 so as to which temperature is dropped to greatest extent by step heat-absorbing energy-accumulating
It is minimum, so that the temperature difference between described heat extractor 2 and described heat absorption working medium 6 is larger, to improve described heat extractor 2
Efficiency, the reversible thermal chemical reaction system 4 of high-temperature and reversible thermal chemical reaction system 3, high temperature and low-temp reversible thermal chemical reaction
Reaction system number inside system 5 is not limited, and each reaction system is coupled in series, and reaction temperature is along described suction
The flow direction of hot working fluid is stepped to successively decrease, and after energy function is released in removal, can be used for the endothermic reaction of differential responses temperature
System, sets up the chemical reaction system of Driven by Solar Energy.
Below the implementation process of the present invention is described in further detail：
As shown in Figure 3 and Figure 4, the present invention provides a kind of step energy storage based on reversible chemical reaction and releases energy system, bag
Include solar tower 1, heat extractor 2, device of working medium 7 and generating set 8, CH4+CO2/CO+H2Reversible reaction system 9, C6H12/C6H6+H2Can
Back reaction system 10, MgH2/Mg+H2Reversible reaction system 11 and air 12 (as heat absorption working medium).By the CH of high temperature of connecting4+
CO2/CO+H2The C of reversible reaction system 9, middle temperature6H12/C6H6+H2The MgH of reversible reaction system 10 and low temperature2/Mg+H2Can be converse
System 11 is answered, the storage to solar energy is realized, and is reversely released energy heat release.
CH4+CO2/CO+H2The C of reversible reaction system 9, middle temperature6H12/C6H6+H2Reversible reaction system 10 and low temperature
MgH2/Mg+H2Reversible reaction system 11 is all highly endothermic and strong exothermal reaction system, is adapted to be used as the medium of chemical energy storage.
The pipeline of air 12 is successively by CH4+CO2/CO+H2Reversible reaction system 9, C6H12/C6H6+H2Reversible reaction system 10
And MgH2/Mg+H2Reversible reaction system 11 is connected in series.Specially：Air 12 is heated to form high temperature, Zhi Houliu in heat extractor 2
To CH4+CO2/CO+H2Reversible reaction system 9, the delivery outlet and CH of heat extractor 24+CO2/CO+H2The high temperature of reversible reaction system 9
End is connected, CH4+CO2/CO+H2The low-temperature end and C of reversible reaction system 96H12/C6H6+H2The temperature end phase of reversible reaction system 10
Even, C6H12/C6H6+H2The low-temperature end and MgH of reversible reaction system 102/Mg+H2The temperature end of reversible reaction system 11 is connected,
MgH2/Mg+H2The low-temperature end of reversible reaction system 11 is connected with the input port of heat extractor 2.
Using range of reaction temperature different residing for 3 reversible reaction systems, to realize the energy storage of gradin and release making
With wherein CH4+CO2/CO+H2Reversible reaction system 9：600-900℃；C6H12/C6H6+H2Reversible reaction system 10：350-500
℃；MgH2/Mg+H2Reversible reaction system 11：250-350℃.
As shown in figure 3, specific thermal energy storage process is comprised the following steps：
(1) air 12 of the high temperature flowed out from the delivery outlet of heat extractor 2 initially enters CH4+CO2/CO+H2Reversible reaction body
It is 9, drives CH4+CO2/CO+H2Reversible reaction system 9 carries out the endothermic reaction of methane dry type refitting, by the air 12 of high temperature certainly
The heat energy of body is converted to the chemical energy of CH4+CO2/CO+H2 reversible reactions system 9, and the temperature of air 12 is reduced to high temperature.
(2) air 12 of the high temperature flowed out from CH4+CO2/CO+H2 reversible reactions system 9 enters C6H12/C6H6+H2Can
Back reaction system 10, drives C6H12/C6H6+H2Reversible reaction system 10 carries out the dehydrogenation endothermic reaction of hexamethylene, by high temperature
Air 12 heat energy of itself is converted to C6H12/C6H6+H2The chemical energy of reversible reaction system 10, the temperature of air 12 are reduced to low
Temperature.
(3) from C6H12/C6H6+H2The air 12 of the low temperature that reversible reaction system 10 flows out enters MgH2/Mg+H2Reversible reaction
System 11, drives MgH2/Mg+H2Reversible reaction system 11 carries out the dehydrogenation endothermic reaction of metal magnesium hydride, by the air of low temperature
12 heat energy of itself are converted to MgH2/Mg+H2The chemical energy of reversible reaction system 11, the temperature of air 12 are further reduced.
As shown in figure 4, specific exoergic process is comprised the following steps：
(1) device of working medium 7 initially enters MgH2/Mg+H2Reversible reaction system 11.MgH2/Mg+H2Reversible reaction system 11 is entered
Row metal magnesium inhales the exothermic reaction (back reaction) of hydrogen, by MgH2/Mg+H2The chemical energy of reversible reaction system 11 is converted to heat energy, and
Heat exchange is carried out with device of working medium 7.Device of working medium 7 absorbs the heat energy released by MgH2/Mg+H2 reversible reactions system 11, and temperature is raised
To saturation temperature, and produce water vapour.
(2) device of working medium 7 flowed out from MgH2/Mg+H2 reversible reactions system 11 enters C6H12/C6H6+H2Reversible reaction system
10。C6H12/C6H6+H2Reversible reaction system 10 carries out the exothermic reaction (back reaction) that benzene inhales hydrogen, by C6H12/C6H6+H2Can be converse
Answer the chemical energy of system 10 to be converted to heat energy, and heat exchange is carried out with device of working medium 7.Device of working medium 7 absorbs C6H12/C6H6+H2Can be converse
The heat energy for answering system 10 to be released, (or whole device of working medium 7 is converted into water steaming by liquid water further to produce more water vapour
Vapour).
(3) from C6H12/C6H6+H2The device of working medium 7 that reversible reaction system 10 flows out enters CH4+CO2/CO+H2 reversible reactions
System 9.CH4+CO2/CO+H2 reversible reactions system 9 carries out the exothermic reaction (back reaction) of the methanation of carbon monoxide, by CH4+
The chemical energy of CO2/CO+H2 reversible reactions system 9 is converted to heat energy, and carries out heat exchange with device of working medium 7.Device of working medium 7 absorbs CH4
The heat energy released by+CO2/CO+H2 reversible reactions system 9, forms superheated vapour, flows to follow-up turbine generator afterwards
Group 8 is generated electricity.
By step energy storage, energy-storage system can fully absorption air 12 heat energy so as to temperature drops to 300 by 1000 DEG C
DEG C, so that larger temperature is kept between heat extractor 2 and air 12, the efficiency of heat extractor 2 is maintained in higher level.
If eliminated after releasing energy function, the present invention can be additionally used in setting up the methane and carbon dioxide of Driven by Solar Energy
(CH4+CO2) dry type refitting, hexamethylene (C6H12) dehydrogenation and metal magnesium hydride (MgH2) dehydrogenase 13 chemical reaction system
System.
Claims (10)
1. a kind of step energy storage based on reversible chemical reaction is with release can system, it is characterised in that include equipped with heat absorption working medium (6)
Heat extractor (2), the delivery outlet of heat extractor (2) is connected to the heat absorption working medium input of high-temperature and reversible thermal chemical reaction system (3),
The heat absorption working medium outfan of high-temperature and reversible thermal chemical reaction system (3) is connected to the reversible thermal chemical reaction system (4) of high temperature
Heat absorption working medium input, the heat absorption working medium outfan of the reversible thermal chemical reaction system (4) of high temperature are connected to low-temp reversible transconversion into heat
The heat absorption working medium input of response system (5) is learned, the heat absorption working medium outfan of low-temp reversible thermal chemical reaction system (5) is connected to
Heat extractor (2) input port；
Also include the generating set (8) promoted by device of working medium (7), the delivery outlet of generating set (8) is connected to low-temp reversible heat
The device of working medium input of chemical reaction system (5), the device of working medium outfan connection of low-temp reversible thermal chemical reaction system (5) are paramount
The device of working medium input of the reversible thermal chemical reaction system (4) of temperature, the device of working medium outfan of high-temperature and reversible thermal chemical reaction system (4)
It is connected to the device of working medium input of high-temperature and reversible thermal chemical reaction system (3), the water conservancy project of high-temperature and reversible thermal chemical reaction system (3)
Matter outfan is connected to the input port of generating set (8).
2. a kind of step energy storage based on reversible chemical reaction according to claim 1 is with release can system, it is characterised in that
Heat extractor (2) bottom is provided with solar tower (1).
3. a kind of step energy storage based on reversible chemical reaction according to claim 1 is with release can system, it is characterised in that
Described heat extractor (2) is cavity type heat absorber or external cylinder heat extractor.
4. a kind of step energy storage based on reversible chemical reaction according to claim 1 is with release can system, it is characterised in that
CH of described high-temperature and reversible thermal chemical reaction system (3) including some series connection4+CO2/CO+H2Reversible reaction system (9).
5. a kind of step energy storage based on reversible chemical reaction according to claim 1 is with release can system, it is characterised in that
C of the reversible thermal chemical reaction system (4) of described high temperature including some series connection6H12/C6H6+H2Reversible reaction system (10).
6. a kind of step energy storage based on reversible chemical reaction according to claim 1 is with release can system, it is characterised in that
MgH of described low-temp reversible thermal chemical reaction system (5) including some series connection2/Mg+H2Reversible reaction system (11).
7. a kind of step energy storage based on reversible chemical reaction is with release can method, it is characterised in that comprise the following steps：
Energy storage：
Step one, initially enters high-temperature and reversible thermal chemical reaction system from the delivery outlet of heat extractor (2) high temperature endothermic working medium out
System (3), drives high-temperature and reversible thermal chemical reaction system (3) to carry out the endothermic reaction, the heat energy of high temperature endothermic working medium itself is changed
For the chemical energy of high-temperature and reversible thermal chemical reaction system (3), the temperature of heat absorption working medium is made to be reduced to high temperature；
Step 2, the high temperature flowed out from high-temperature and reversible thermal chemical reaction system (3) absorb heat working medium into the reversible transconversion into heat of high temperature
Response system (4) is learned, drives the reversible thermal chemical reaction system (4) of high temperature to carry out the endothermic reaction, by high temperature heat absorption working medium certainly
The heat energy of body is converted to the chemical energy of the reversible thermal chemical reaction system (4) of high temperature, makes the temperature of heat absorption working medium be reduced to low temperature；
Step 3, the low temperature heat absorption working medium that therefrom high-temperature and reversible thermal chemical reaction system (4) flows out enter low-temp reversible heat chemistry
Response system (5), drives low-temp reversible thermal chemical reaction system (5) to carry out the endothermic reaction, the heat of working medium itself that low temperature is absorbed heat
The chemical energy of low-temp reversible thermal chemical reaction system (5) can be converted to, the temperature of working medium of absorbing heat further is reduced；
Release energy：
Step one, device of working medium (7) initially enter low-temp reversible thermal chemical reaction system (5), low-temp reversible thermal chemical reaction system
(5) exothermic reaction is carried out, the chemical energy of low-temp reversible thermal chemical reaction system (5) is converted to into heat energy, and is entered with device of working medium (7)
Row heat exchange, device of working medium (7) absorb the heat energy released by low-temp reversible thermal chemical reaction system (5), and temperature is increased to saturation temperature
Degree, and produce water vapour；
Step 2, the device of working medium flowed out from low-temp reversible thermal chemical reaction system (5) enter the reversible thermal chemical reaction system of high temperature
System (4), the reversible thermal chemical reaction system (4) of high temperature carries out exothermic reaction, by high temperature reversible thermal chemical reaction system (4)
Chemical energy is converted to heat energy, and carries out heat exchange with device of working medium, and device of working medium absorbs reversible thermal chemical reaction system (4) institute of high temperature
The heat energy of releasing, further produces more water vapour；
Step 3, the device of working medium that therefrom high-temperature and reversible thermal chemical reaction system (4) flows out enter high-temperature and reversible thermal chemical reaction system
System (3), high-temperature and reversible thermal chemical reaction system (3) carries out exothermic reaction, by the chemistry of high-temperature and reversible thermal chemical reaction system (3)
Heat energy being converted to, and heat exchange being carried out with device of working medium, device of working medium absorbs what high-temperature and reversible thermal chemical reaction system (3) was released
Heat energy, forms superheated vapour, flows to generating set (8) afterwards and generated electricity.
8. a kind of step energy storage based on reversible chemical reaction according to claim 7 is with release can method, it is characterised in that
CH of described high-temperature and reversible thermal chemical reaction system (3) including some series connection4+CO2/CO+H2Reversible reaction system (9).
9. a kind of step energy storage based on reversible chemical reaction according to claim 7 is with release can method, it is characterised in that
C of the reversible thermal chemical reaction system (4) of described high temperature including some series connection6H12/C6H6+H2Reversible reaction system (10).
10. a kind of step energy storage based on reversible chemical reaction according to claim 7 exists with energy method, its feature is released
In the MgH of described low-temp reversible thermal chemical reaction system (5) including some series connection2/Mg+H2Reversible reaction system (11).
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