CN109386439B - Solar energy storage power generation system and method based on oxidation-reduction reaction - Google Patents
Solar energy storage power generation system and method based on oxidation-reduction reaction Download PDFInfo
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- CN109386439B CN109386439B CN201811118547.6A CN201811118547A CN109386439B CN 109386439 B CN109386439 B CN 109386439B CN 201811118547 A CN201811118547 A CN 201811118547A CN 109386439 B CN109386439 B CN 109386439B
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- Prior art keywords
- reaction
- gas
- power generation
- temperature
- solar energy
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- 238000010248 power generation Methods 0.000 title claims abstract description 62
- 238000004146 energy storage Methods 0.000 title claims abstract description 23
- 238000006479 redox reactions Methods 0.000 title claims abstract description 13
- 238000006243 chemical reactions Methods 0.000 claims abstract description 51
- 229910000141 manganese(II) oxide Inorganic materials 0.000 claims abstract description 26
- 239000011572 manganese Substances 0.000 claims abstract description 16
- 238000005338 heat storage Methods 0.000 claims abstract description 13
- 239000000126 substances Substances 0.000 claims abstract description 11
- 238000000034 methods Methods 0.000 claims abstract description 4
- 239000007789 gases Substances 0.000 claims description 90
- 239000011901 water Substances 0.000 claims description 22
- 238000000926 separation method Methods 0.000 claims description 21
- 239000002918 waste heat Substances 0.000 claims description 17
- 238000006722 reduction reactions Methods 0.000 claims description 12
- 238000007254 oxidation reactions Methods 0.000 claims description 11
- 229910000469 manganese(III) oxide Inorganic materials 0.000 claims description 10
- 239000007787 solids Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
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- 239000003245 coal Substances 0.000 description 2
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- 238000005516 engineering processes Methods 0.000 description 2
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- 241001081830 Degeneriaceae Species 0.000 description 1
- NUJOXMJBOLGQSY-UHFFFAOYSA-N Manganese dioxide Chemical compound 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O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000005431 greenhouse gases Substances 0.000 description 1
- 229910000470 manganese(II,III) oxide Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reactions Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000003786 synthesis reactions Methods 0.000 description 1
- 230000002194 synthesizing Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/06—Devices for producing mechanical power from solar energy with means for concentrating solar rays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
Abstract
Description
Technical Field
The invention belongs to the technical field of solar high-temperature heat storage power generation, and particularly relates to a solar energy storage power generation system and method based on an oxidation-reduction reaction.
Background
Development of energy in human societyThe solar energy is widely distributed and inexhaustible in a plurality of renewable energy sources, the total amount of solar energy received by the earth every year reaches 1 × 1018kWh, corresponding to 1.3 × 1014The standard coal per ton is rich in solar energy resources in the southwest United states, Africa, Australia, the western China and other regions. The development and utilization of solar energy are of great significance for meeting the increasing energy demand of human beings and reducing the emission of greenhouse gases. The solar thermal power generation utilizes the light gathering device to collect the heat of solar energy, provides high-temperature and high-pressure steam through the heat exchange device, and then utilizes the high-temperature and high-pressure steam to push the Rankine cycle steam turbine to realize power generation. By adopting the solar photo-thermal power generation, the dependence on non-renewable energy sources such as coal, petroleum, natural gas and the like can be avoided, and no secondary pollution is generated. Therefore, solar thermal power generation is one of the important approaches to solving the current energy crisis.
However, solar energy has the defects of discontinuity and instability, which is one of the main problems faced in developing and utilizing solar energy. In order to improve the net generating efficiency of solar energy and realize the continuous and stable operation of the unit, various complementary generating systems integrating solar energy and a combined cycle generating system have been developed, and the main complementary modes include the following two modes: 1. the linear light-gathering device is combined with a bottom Rankine cycle to complete preheating or evaporation of a steam part so as to improve the power generation capacity of the unit; 2. the tower type point light-gathering and heat-collecting technology is combined with the Brayton cycle at the top, air pressurized by the air compressor is heated to 800-1000 ℃, and then the air is sent into the combustion chamber, so that the consumption of fossil energy is reduced. In addition, a technical scheme that high-temperature solar energy generated by tower type focusing is utilized to drive solid hydrocarbon fuels such as biomass to be gasified and the high-efficiency utilization of a combined cycle power generation system is provided, and after the solar energy is converted into high-quality chemical energy, the high-efficiency conversion of the chemical energy is realized.
However, further research shows that for the complementary form of heating compressed air by combining high-temperature solar energy and brayton top cycle, not only a large amount of fossil energy such as natural gas is still consumed, but also complementary operation of a power generation system at night is difficult to realize by means of heat storage due to overhigh heat collection temperature; secondly, for the purpose of converting solid hydrocarbon fuels such as biomass and the like into fuels which can be used by a fuel gas-steam combined cycle system to realize power generation and energy storage, although the regeneration of clean energy can be realized, the system still cannot overcome the problem of high-temperature energy storage, and meanwhile, the system is large and difficult to operate, and the obtained synthesis gas also generates a large amount of CO and CO in the combustion process2And the atmospheric environment is polluted. Accordingly, there is a need in the art for further research and improvement to better utilize solar energy to meet the power generation and energy storage requirements.
Disclosure of Invention
In response to the above-identified deficiencies in or needs for improvement over the prior art, the present invention provides a solar energy storage power generation system based on redox reactions by utilizing MnO/Mn2O3The system can efficiently realize the conversion of solar energy on the basis of not consuming fossil energy such as other natural gas and the like, and can store the concentrated high-temperature solar energy in the form of chemical energy for continuous power generation all day, and has the characteristics of compact structure, simple operation process, high solar energy utilization rate, low initial input cost, environmental friendliness and the like.
To achieve the above objects, according to one aspect of the present invention, there is provided a solar energy storage power generation system based on oxidation-reduction reaction, comprising a concentrating solar subsystem, a high temperature solar reaction subsystem and a circulating power generation subsystem,
the concentrating solar subsystem comprises a solar field and a hyperboloid reflector and is used for receiving solar energy, focusing the received solar energy and projecting the focused solar energy onto the high-temperature solar reaction subsystem to provide heat required by the reaction of the high-temperature solar reaction subsystem;
high temperature solar energy reaction subsystem includes cold apotheca, first fluidized bed reactor, hot apotheca and second fluidized bed reactor, the discharge gate of cold apotheca with first fluidized bed reactor's feed inlet links to each other, first fluidized bed reactor's discharge gate via the separation chamber with the hot apotheca links to each other, cold apotheca is used for the MnO input with wherein storage under daytime illumination condition first fluidized bed reactor, and take place the reduction reaction under the heat drive and generate MnO and high temperature gas, from this with high temperature gas input the circulation power generation subsystem generates electricity, the hot apotheca is used for under the night condition with MnO input of wherein storage carry out oxidation reaction in the second fluidized bed reactor, generate Mn2O3And entering the next working cycle, and simultaneously releasing the stored energy of the chemical bonds to heat the gas, so that the generated high-temperature gas is input into the cycle power generation subsystem again to generate power;
the circulating power generation subsystem comprises a gas turbine and a power generator, wherein a gas inlet of the gas turbine is connected with the separation chamber and a gas outlet of the second fluidized bed reactor and is used for collecting high-temperature oxygen and nitrogen and driving the gas turbine to do work by utilizing the high-temperature oxygen and the nitrogen, so that the power generator is driven to generate power; and the gas outlet of the gas turbine is respectively connected with the separation chamber and the gas inlet of the second fluidized bed reactor, and is used for feeding the gas cooled after doing work back to the high-temperature solar reaction subsystem, so that the gas enters the next cycle process of solar reaction and power generation.
Furthermore, the cycle power generation subsystem further comprises a waste heat boiler, a steam turbine, a condenser and a water pump which are connected in sequence, wherein a water outlet of the water pump is connected with a water inlet of the waste heat boiler, so that a cyclic water vapor loop is formed.
Furthermore, a fan is arranged below the cold storage chamber.
Furthermore, a clapboard with holes is arranged in the middle of the second fluidized bed reactor.
Further, a first rotary feeder is arranged between the heat storage chamber and the second fluidized bed reactor.
Further, a second rotary feeder is arranged between the second fluidized bed reactor and the downcomer.
Further, a secondary gas ejector is arranged at the gas inlet of the first fluidized bed reactor.
According to another aspect of the present invention, there is also provided a method for a solar energy storage power generation system based on oxidation-reduction reaction, including the following steps:
s1 storing Mn in the cold storage chamber2O3The Mn is conveyed into the first fluidized bed reactor through a feed valve, and the Mn is driven by utilizing heat generated by a concentrating solar subsystem2O3Reduction reaction of (3);
s2, separating MnO generated in the reaction in the S1 and high-temperature gas in the separation chamber, sending solid MnO into a heat storage chamber for storage, and sending the high-temperature gas into a gas turbine to drive the gas turbine to do work so as to drive a generator to generate electricity;
s3: MnO particles in the heat storage chamber are fed into the second fluidized bed reactor for oxidation reaction, and Mn generated by the reaction2O3The high-temperature gas generated by the reaction enters a gas turbine and drives the gas turbine to do work, so that a generator is driven to generate electricity;
s4: and the second high-temperature gas after working is sent back to the separation chamber and the second fluidized bed reactor to enter the next circulation reaction.
Further, the secondary high-temperature gas after doing work in the step S2 is sent into the exhaust-heat boiler, and the water in the exhaust-heat boiler is converted into high-temperature water vapor by using the gas exhaust heat, so as to drive the steam turbine to do work, and further drive the generator to generate electricity, the generated low-temperature gas is sent back to the separation chamber and the second fluidized bed reactor, enters into the next cycle reaction, and the water vapor after doing work is sent into the condenser to be condensed into liquid water, and then is sent into the exhaust-heat boiler through the water pump, and enters into the next working cycle.
Generally, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. the power generation system of the present invention, wherein MnO/Mn is utilized2O3The system has the advantages that the redox cycling reaction is combined with high heat generated by concentrating solar energy, the high-temperature solar energy collected in the daytime is stored in a chemical energy form, meanwhile, the high heat released by the chemical energy is utilized in two different path modes to realize continuous power generation all day long, compared with the prior art, the system can efficiently realize the conversion of the solar energy on the basis of not consuming fossil energy such as other natural gas and the like, and can store the concentrated high-temperature solar energy in the chemical energy form for continuous power generation all day long.
2. The power generation system of the invention fully utilizes the waste heat generated after oxygen and nitrogen do work to heat water, thereby utilizing the water vapor generated by heating to continue do work to generate power, and further improving the utilization rate of solar energy.
Drawings
FIG. 1 is a schematic diagram of a solar energy storage power generation system based on oxidation-reduction reaction;
FIG. 2 is a schematic diagram of a specific structure of a high-temperature solar reaction subsystem according to the present invention;
fig. 3 is a conceptual diagram of a manganese oxide redox cycle power generation system according to the present invention.
In all the figures, the same reference numerals denote the same features, in particular: 1-a high-temperature solar reaction subsystem, 2-a gas turbine, 3-a waste heat boiler, 4-a steam turbine, 5-a condenser, 6-a water pump, 7-a generator, 8-a heliostat field, 9-a fan, 10-a cold storage chamber, 11-a first fluidized bed reactor, 12-a secondary gas ejector, 13-a separation chamber, 14-a hot storage chamber, 15-a second fluidized bed reactor, 16-a clapboard with holes, 17-a downcomer, A-nitrogen, B-oxygen and nitrogen.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the solar energy storage power generation system based on oxidation-reduction reaction according to the embodiment of the present invention includes a high temperature solar reaction subsystem 1, a circulating power generation subsystem disposed on one side of the high temperature solar reaction subsystem 1, and a concentrating solar subsystem disposed above the high temperature solar reaction subsystem 1.
As shown in fig. 2, which is a specific structural diagram of the high temperature solar reaction subsystem, the high temperature solar reaction subsystem 1 includes a blower 9, a cold storage chamber 10, a first fluidized bed reactor 11, a secondary gas injector 12, a separation chamber 13, a hot storage chamber 14, a second fluidized bed reactor 15, a perforated partition 16 and a downcomer 17. The fan 9 is arranged below the cold storage chamber 10 and used for supplying the protective gas N2To the cold storage 10, and an inlet of the first fluidized bed reactor 11 is connected to the cold storage 10 for storing Mn in the cold storage 102O3And a shielding gas N2Sent to a first fluidized bed reactor 11 for reaction, Mn2O3The reduction reaction is carried out under the high temperature condition of more than 1500 ℃ generated by concentrating solar energy to generate high-temperature oxygen and MnO. The outlet end of the first fluidized bed reactor 11 is connected with a separation chamber 13, the separation chamber 13 separates gas and solid, the solid is sent to a heat storage chamber 14 connected with the solid outlet end of the separation chamber 13 through the solid outlet end of the separation chamber, and the gas is sent to a circulating power generation subsystem through the gas outlet end of the gas for power generation. The outlet end of the hot reservoir 14 is connected to a second fluidized bed reactor 15 through a first rotary feeder, a perforated partition 16 is provided at the bottom of the second fluidized bed reactor 15, and the outlet end of the second fluidized bed reactor 15 is connected to the cold reservoir 10 through a second rotary feeder, thereby forming MnO/Mn2O3A subsystem of redox cycling reactions. Wherein:
the lighting condition is sufficient in the daytimeIn the meantime, the system directly utilizes the first fluidized bed reactor 11 to complete Mn2O3Reduction of the particles, MnO particles from the reaction being fed into the heat reservoir 14, high temperature O2And a shielding gas N2And sending the power to a circulating power generation subsystem for high-efficiency power generation. At night when the lighting conditions are insufficient, the first rotary feeder is turned on, the second fluidized bed reactor 15 is used and MnO and O are used2Oxidation reaction exotherms occur, and Mn generated by the oxidation reaction2O3Feeding into a cold storage chamber 10, excess high temperature O2And a shielding gas N2And sending the power to the circulating power generation subsystem again for high-efficiency power generation. In the daytime, the tower type solar focusing equipment is utilized to obtain high-temperature solar driven Mn above 1500 DEG C2O3The particles are subjected to a high-temperature reduction reaction in a first fluidized bed reactor 11, N2Protective gas for the reduction reaction, Mn2O3From the cold store 10, the first rotary feeder is now closed. Mn in the first fluidized bed reactor 112O3Reduction reaction occurs, the produced MnO particles are sent into a heat storage chamber 14 through a separation chamber 13, and the MnO particles and O are mixed at night2Oxidation reaction occurs, high temperature O2And a shielding gas N2And sending the power to a circulating power generation subsystem for high-efficiency power generation.
During the night period, the first rotary feeder was turned on, the second fluidized bed reactor 15 was used and MnO and O were utilized2Oxidation reaction occurs at a temperature slightly lower than that of the reduction reaction, the heat released by the oxidation reaction can be used for continuously carrying out the reaction without an external heat source, and N is2MnO is obtained from the thermal reservoir 14 as a shielding gas for the oxidation reaction. MnO in the second fluidized bed reactor 15 is oxidized to produce Mn2O3Feeding into cold storage chamber 10 via second rotary feeder and downcomer 17, and carrying out reduction reaction again at daytime to obtain excessive high temperature O2And a shielding gas N2And sending the power to a gas-steam combined cycle power generation system again for high-efficiency power generation.
As shown in fig. 1, the cyclic power generation subsystem includes a gas turbine 2, a waste heat boiler 3, a steam turbine 4, a condenser 5, a water pump 6 and a generator 7, wherein, the power output end of the gas turbine 2 is connected with the generator 7, the gas output end is connected with the waste heat boiler 3, the gas output end of the waste heat boiler 3 is connected with a fan 9, meanwhile, the steam output end of the waste heat boiler 3 is connected with the steam turbine 4, the power output end of the steam turbine 4 is connected with the generator 7, the steam output end is connected with the condenser 5 and the water pump 6 in sequence and is conveyed to the steam input end of the waste heat boiler 3 through the water pump 6. Wherein:
high temperature O generated by the first fluidized bed reactor 11 during the daytime and the fluidized bed reactor 15 during the night2And N2(the temperature is 1200 ℃ C. and 1300 ℃ C.) is firstly sent to the gas turbine 2 and drives the gas turbine 2 to do work in a rotating way, and the high temperature O discharged by the gas turbine 22And N2(the temperature is 600-2And N2And the waste heat is discharged from the waste heat boiler 3 and sent to the high-temperature solar reaction subsystem 1 for recycling, and meanwhile, the gas turbine 2 and the steam turbine 4 drive the generator 7 to rotate for power generation.
As a further preference, the first fluidized bed reactor 11 is made by fluidized bed technology, and a fan 9 is arranged at the bottom of the cold storage chamber 10, and pure high-pressure N is introduced from the bottom2A fluidized state is promoted to be formed in the first fluidized-bed reactor 11. The first fluidized bed reactor 11 further makes full use of the high-speed kinetic energy of the fed gaseous reactants to form a vortex flow field inside the first fluidized bed reactor 11, so that the disturbance of the reactants is accelerated, and the dynamic reaction performance is improved.
As a further preference, the first fluidized bed reactor 11 is further provided with a secondary gas ejector 12 to ensure Mn2O3Smooth flow in the interior thereof.
According to another aspect of the present invention, there is also provided a method for a solar energy storage power generation system based on oxidation-reduction reaction, including the following steps:
s1, storing the cold storage chamberMn of (2)2O3The Mn is conveyed into the first fluidized bed reactor through a feed valve, and the Mn is driven by utilizing heat generated by a concentrating solar subsystem2O3Reduction reaction of (3);
s2, separating MnO generated in the reaction in the S1 and high-temperature gas in the separation chamber, sending solid MnO into a heat storage chamber for storage, and sending the high-temperature gas into a gas turbine to drive the gas turbine to do work so as to drive a generator to generate electricity;
s3: MnO particles in the heat storage chamber are fed into the second fluidized bed reactor for oxidation reaction, and Mn generated by the reaction2O3The high-temperature gas generated by the reaction enters a gas turbine and drives the gas turbine to do work, so that a generator is driven to generate electricity;
s4: and the second high-temperature gas after working is sent back to the separation chamber and the second fluidized bed reactor to enter the next circulation reaction.
Further, the secondary high-temperature gas after doing work in the step S2 is sent into the exhaust-heat boiler, and the water in the exhaust-heat boiler is converted into high-temperature water vapor by using the gas exhaust heat, so as to drive the steam turbine to do work, and further drive the generator to generate electricity, the generated low-temperature gas is sent back to the separation chamber and the second fluidized bed reactor, enters into the next cycle reaction, and the water vapor after doing work is sent into the condenser to be condensed into liquid water, and then is sent into the exhaust-heat boiler through the water pump, and enters into the next working cycle.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
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