阅读说明：本技术 一种太阳能存储系统 (Solar energy storage system ) 是由 肖松 刘艳娜 于 2021-09-24 设计创作，主要内容包括：本发明公开一种太阳能存储系统,包括定日镜、聚光太阳能接收器、换热器和储存罐；换热器包括换热外管、换热内管,换热外管固接在聚光太阳能接收器底端,储存罐固接在换热外管底端,聚光太阳接收器和储存罐通过换热外管连通；换热内管固接在换热外管内,换热内管的外径小于换热外管的内径,换热内管一端伸入聚光太阳能接收器内,换热内管另一端伸入储存罐内；储存罐内填充有碳酸钙颗粒；储存罐底端连通有二氧化碳供应机构和鼓风机构,储存罐顶部连通有能耗机构。本发明过程简单易懂且易于实现,储存了太阳能的氧化钙还能应用到其他反应或生产过程中,在提高了太阳能的使用效率的同时,还扩大了太阳能的使用范围。(The invention discloses a solar energy storage system, which comprises a heliostat, a concentrating solar energy receiver, a heat exchanger and a storage tank, wherein the heliostat is arranged on the concentrating solar energy receiver; the heat exchanger comprises a heat exchange outer pipe and a heat exchange inner pipe, the heat exchange outer pipe is fixedly connected to the bottom end of the concentrating solar receiver, the storage tank is fixedly connected to the bottom end of the heat exchange outer pipe, and the concentrating solar receiver is communicated with the storage tank through the heat exchange outer pipe; the heat exchange inner pipe is fixedly connected in the heat exchange outer pipe, the outer diameter of the heat exchange inner pipe is smaller than the inner diameter of the heat exchange outer pipe, one end of the heat exchange inner pipe extends into the concentrating solar receiver, and the other end of the heat exchange inner pipe extends into the storage tank; calcium carbonate particles are filled in the storage tank; the bottom end of the storage tank is communicated with a carbon dioxide supply mechanism and an air blowing mechanism, and the top of the storage tank is communicated with an energy consumption mechanism. The method has the advantages of simple and easily understood process and easy realization, and the calcium oxide storing the solar energy can be applied to other reactions or production processes, thereby improving the use efficiency of the solar energy and simultaneously expanding the use range of the solar energy.)

1. A solar energy storage system, characterized by: comprises a heliostat (1), a concentrating solar receiver (2), a heat exchanger and a storage tank (7);

the heat exchanger comprises a heat exchange outer pipe (5) and a heat exchange inner pipe (4), the heat exchange outer pipe (5) is fixedly connected to the bottom end of the concentrating solar receiver (2), the storage tank (7) is fixedly connected to the bottom end of the heat exchange outer pipe (5), and the concentrating solar receiver (2) is communicated with the storage tank (7) through the heat exchange outer pipe (5); the heat exchange inner tube (4) is fixedly connected in the heat exchange outer tube (5), the outer diameter of the heat exchange inner tube (4) is smaller than the inner diameter of the heat exchange outer tube (5), one end of the heat exchange inner tube (4) extends into the concentrating solar receiver (2), and the other end of the heat exchange inner tube (4) extends into the storage tank (7); calcium carbonate particles are filled in the storage tank (7);

the bottom end of the storage tank (7) is communicated with a carbon dioxide supply mechanism and an air blowing mechanism, and the top of the storage tank (7) is communicated with an energy consumption mechanism.

2. A solar energy storage system according to claim 1, wherein: the air blowing mechanism comprises an air compressor (14), the bottom end of the storage tank (7) is communicated with an air inlet (8), and the air compressor (14) is communicated with the air inlet (8).

3. A solar energy storage system according to claim 1, wherein: the carbon dioxide supply mechanism comprises a carbon dioxide storage tank (10) and a carbon dioxide supply machine (12) communicated with the carbon dioxide storage tank (10); the bottom end of the storage tank (7) is communicated with a carbon dioxide inlet (9), and the carbon dioxide storage tank (10) is communicated with the carbon dioxide inlet (9).

4. A solar energy storage system according to claim 3, wherein: the top of the concentrating solar receiver (2) is communicated with a carbon dioxide outlet (3), and the carbon dioxide outlet (3) is communicated with the carbon dioxide storage tank (10).

5. A solar energy storage system according to claim 1, wherein: the energy consumption mechanism comprises an energy consumption machine (13), the top of the storage tank (7) is communicated with an air outlet (6), and the air outlet (6) is communicated with the energy consumption machine (13).

6. A solar energy storage system according to claim 5, wherein: the power consumption machine (13) is also communicated with an adsorption mechanism for adsorbing carbon dioxide, the adsorption mechanism comprises an adsorption tank (16), the top end of the adsorption tank (16) is communicated with an inlet pipe (15) and an outlet pipe (17), and the adsorption tank (16) is filled with calcium hydroxide solution; one end of the inlet pipe (15) is communicated with the power consumption machine (13), and the other end of the inlet pipe (15) is positioned below the liquid level of the calcium hydroxide solution; the outlet pipe (17) is positioned above the liquid level of the calcium hydroxide solution.

7. A solar energy storage system according to claim 1, wherein: the heliostat (1) is installed in an open area without a shield.

Technical Field

The invention relates to the technical field of energy conversion, in particular to a solar energy storage system.

Background

Solar energy has gained wide attention as a clean renewable energy source. Although solar energy is pollution-free and inexhaustible, and is an excellent substitute for traditional energy, the energy also has the defects of strong dispersity, low stability, low application efficiency and the like, so that the application of the energy is always a key problem for key research of people.

In order to improve the utilization rate of solar energy, it is attempted to lay large-area solar receiving devices to directly receive the heat in the solar energy, such as large-area solar panels, or concentrate the solar energy by reflectors to generate heat at higher temperature for use in other high-temperature processes. However, since there is no solar energy at night and the receiving of the solar energy is hindered in rainy days, the use of the solar energy is greatly limited, especially for long-term industrial production processes, and the greatest disadvantage of the solar energy is that stable energy cannot be continuously provided. Although the method of directly converting solar energy into electric energy and storing the electric energy in the battery is common, the method needs a whole set of photovoltaic power generation equipment in the energy storage process, the cost is high, and the waste energy storage battery contains a large amount of harmful substances, so that the subsequent treatment easily pollutes the environment.

Therefore, it is desirable to design a solar energy storage system to solve the above problems.

Disclosure of Invention

It is an object of the present invention to provide a solar energy storage system to solve the above problems of the prior art.

In order to achieve the purpose, the invention provides the following scheme: the invention provides a solar energy storage system, which comprises a heliostat, a concentrating solar energy receiver, a heat exchanger and a storage tank, wherein the heliostat is arranged on the concentrating solar energy receiver;

the heat exchanger comprises a heat exchange outer pipe and a heat exchange inner pipe, the heat exchange outer pipe is fixedly connected to the bottom end of the concentrating solar receiver, the storage tank is fixedly connected to the bottom end of the heat exchange outer pipe, and the concentrating solar receiver is communicated with the storage tank through the heat exchange outer pipe; the heat exchange inner pipe is fixedly connected in the heat exchange outer pipe, the outer diameter of the heat exchange inner pipe is smaller than the inner diameter of the heat exchange outer pipe, one end of the heat exchange inner pipe extends into the concentrating solar receiver, and the other end of the heat exchange inner pipe extends into the storage tank; calcium carbonate particles are filled in the storage tank;

the bottom end of the storage tank is communicated with a carbon dioxide supply mechanism and an air blowing mechanism, and the top of the storage tank is communicated with an energy consumption mechanism.

Preferably, the air blowing mechanism comprises an air compressor, the bottom end of the storage tank is communicated with an air inlet, and the air compressor is communicated with the air inlet.

Preferably, the carbon dioxide supply mechanism comprises a carbon dioxide storage tank and a carbon dioxide supply machine communicated with the carbon dioxide storage tank; the holding vessel bottom intercommunication has the carbon dioxide import, carbon dioxide storage jar with carbon dioxide import intercommunication.

Preferably, the top of the concentrating solar receiver is communicated with a carbon dioxide outlet, and the carbon dioxide outlet is communicated with the carbon dioxide storage tank.

Preferably, the energy consumption mechanism comprises an energy consumption machine, the top of the storage tank is communicated with an air outlet, and the air outlet is communicated with the energy consumption machine.

Preferably, the power consumption machine is also communicated with an adsorption mechanism for adsorbing carbon dioxide, the adsorption mechanism comprises an adsorption tank, the top end of the adsorption tank is communicated with an inlet pipe and an outlet pipe, and a calcium hydroxide solution is filled in the adsorption tank; one end of the inlet pipe is communicated with the power consumption machine, and the other end of the inlet pipe is positioned below the liquid level of the calcium hydroxide solution; the outlet pipe is positioned above the liquid level of the calcium hydroxide solution.

Preferably, the heliostats are installed in an open area without shelter.

The invention discloses the following technical effects:

1. according to the invention, the heat of the solar energy reflected by the heliostat is absorbed by the concentrating solar receiver, and the calcium carbonate is heated, decomposed and absorbed to form calcium carbonate for storage, so that the energy is conveniently released under the condition of dark or cloudy and no sunlight, the energy is provided for an energy consumption mechanism, and the problems of strong solar energy dispersibility and low stability are solved.

2. The invention uses calcium oxide to store solar energy, has lower cost and is easy to store and transport, the whole set of equipment can be used as energy storage equipment and can also be used as a large-scale preparation machine of calcium oxide, and the application range is wider.

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 embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic diagram of a solar energy storage system of the present invention;

FIG. 2 is an isometric view of a concentrating solar receiver according to a second embodiment of the present invention;

FIG. 3 is a cross-sectional view of a concentrating solar receiver according to a second embodiment of the present invention;

FIG. 4 is an enlarged view of A in FIG. 3;

FIG. 5 is a schematic structural diagram of a heat exchange inner tube in the third embodiment of the present invention;

the solar energy collecting device comprises a heliostat 1, a concentrating solar receiver 2, a carbon dioxide outlet 3, a heat exchange inner tube 4, a heat exchange outer tube 5, an air outlet 6, a storage tank 7, an air inlet 8, a carbon dioxide inlet 9, a carbon dioxide storage tank 10, an electromagnetic valve 11, a carbon dioxide supplier 12, a power consumption machine 13, an air compressor 14, an inlet tube 15, an adsorption tank 16, an outlet tube 17, a one-way valve 18, a flow rate meter 19, a fixing plate 21, a heat absorbing plate 22, a first heat conducting column 23, a conduction block 24, a reaction chamber 25, a second heat conducting column 26, a heat radiating block 27, a fin 28, an annular channel 29 and a hot air channel 31.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

The first embodiment is as follows:

the invention provides a solar energy storage system, which comprises a heliostat 1, a concentrating solar energy receiver 2, a heat exchanger and a storage tank 7, wherein the heliostat is arranged on the heliostat;

the heat exchanger comprises a heat exchange outer tube 5 and a heat exchange inner tube 4, the heat exchange outer tube 5 is fixedly connected to the bottom end of the concentrating solar receiver 2, the storage tank 7 is fixedly connected to the bottom end of the heat exchange outer tube 5, and the concentrating solar receiver 2 is communicated with the storage tank 7 through the heat exchange outer tube 5; the heat exchange inner tube 4 is fixedly connected in the heat exchange outer tube 5, the outer diameter of the heat exchange inner tube 4 is smaller than the inner diameter of the heat exchange outer tube 5, one end of the heat exchange inner tube 4 extends into the concentrating solar receiver 2, and the other end of the heat exchange inner tube 4 extends into the storage tank 7; calcium carbonate particles are filled in the storage tank 7;

the bottom end of the storage tank 7 is communicated with a carbon dioxide supply mechanism and an air blowing mechanism, and the top of the storage tank 7 is communicated with an energy consumption mechanism. Heliostat 1 reflects the sunlight to spotlight solar receiver 2, spotlight solar receiver 2 absorbs the heat of sunlight, make spotlight solar receiver 2 have higher temperature, can satisfy the temperature that calcium carbonate is heated and decomposed, calcium carbonate has absorbed the energy of sun and has stored to holding vessel 7 through the calcium oxide that is heated and decomposed and form, when needs release energy, let in carbon dioxide in the holding vessel 7, carbon dioxide and calcium oxide reaction form calcium carbonate, with the energy release of the sun of absorption, the calcium oxide that is heated and decomposed simultaneously and forms can also be applied to in other reactions or the production process, solar energy application scope has been enlarged.

Further, the air blowing mechanism comprises an air compressor 14, the bottom end of the storage tank 7 is communicated with an air inlet 8, and the air compressor 14 is communicated with the air inlet 8. The high-pressure gas generated by the air compressor 14 blows calcium carbonate particles in the storage tank 7, the calcium carbonate particles are blown into the concentrating solar receiver 2 through the heat exchange inner tube 4 and are heated and decomposed into calcium oxide and carbon dioxide at the concentrating solar receiver 2, the calcium oxide falls back into the storage tank 7 along a gap between the heat exchange inner tube 4 and the heat exchange outer tube 5 under the action of gravity, and the circulation is repeated until the calcium carbonate is completely converted into calcium oxide, and the process is an energy absorption process. Meanwhile, the calcium oxide formed by decomposition has higher temperature, and can preheat the rising calcium carbonate in the process of falling back to the storage tank 7, so that the calcium carbonate can be decomposed more quickly when entering the concentrating solar receiver 2.

Further, the carbon dioxide supply means includes a carbon dioxide storage tank 10 and a carbon dioxide supply machine 12 communicating with the carbon dioxide storage tank 10; the bottom end of the storage tank 7 is communicated with a carbon dioxide inlet 9, and the carbon dioxide storage tank 10 is communicated with the carbon dioxide inlet 9. When energy stored in calcium oxide needs to be released to provide energy for the power consumption machine 13, carbon dioxide generated by a carbon dioxide supply machine 12 is sent into the storage tank 7 through the carbon dioxide storage tank 10 through the carbon dioxide inlet 9, the carbon dioxide reacts with the calcium oxide to form calcium carbonate to release energy, the carbon dioxide entering through the carbon dioxide inlet 9 can stir the calcium oxide, the calcium oxide can fully react to form calcium carbonate, the released energy is sent to the power consumption machine 13 along the air outlet to provide energy for the power consumption machine 13, the energy releasing process is a process in which the air compressor 14 is closed, namely, an energy absorbing process and an energy releasing process cannot be carried out simultaneously.

Further, in order to reuse carbon dioxide generated by thermal decomposition of calcium carbonate and reduce carbon emission, the top of the concentrating solar receiver 2 is communicated with a carbon dioxide outlet 3, and the carbon dioxide outlet 3 is communicated with a carbon dioxide storage tank 10.

Further, the energy consumption mechanism comprises an energy consumption machine 13, the top of the storage tank 7 is communicated with an air outlet 6, and the air outlet 6 is communicated with the energy consumption machine 13. The surplus carbon dioxide transfers the energy generated by calcium oxide to form calcium carbonate to the power consumption machine 13, and provides energy for the power consumption machine 13.

Further, the power consumption machine 13 is also communicated with an adsorption mechanism for adsorbing carbon dioxide, the adsorption mechanism comprises an adsorption tank 16, the top end of the adsorption tank 16 is communicated with an inlet pipe 15 and an outlet pipe 17, and the adsorption tank 16 is filled with a calcium hydroxide solution; one end of the inlet pipe 15 is communicated with the power consumption machine 13, and the other end of the inlet pipe 15 is positioned below the liquid level of the calcium hydroxide solution; the outlet pipe 17 is positioned above the liquid level of the calcium hydroxide solution. Carbon dioxide is absorbed by the calcium hydroxide solution to form calcium carbonate precipitate, the calcium carbonate precipitate is dried and then is supplemented to the storage tank 7, and the storage and release of solar energy can be further applied, so that excessive carbon emission is avoided, and the method is more environment-friendly.

Further, the carbon dioxide storage tank 10 is communicated with the carbon dioxide supply machine 12, the power consumption machine 13 is communicated with the gas outlet 6, the carbon dioxide storage tank 10 is communicated with the carbon dioxide inlet 9, the air compressor 14 is communicated with the gas inlet 8 through the electromagnetic valve 11, and the carbon dioxide storage tank 10 is communicated with the carbon dioxide outlet 3 through the one-way valve 18.

Furthermore, a flow meter 19 is arranged between the one-way valve 18 and the carbon dioxide outlet 3, when the flow meter 19 is zero, the calcium carbonate is completely reacted, and the operation of the air compressor 14 can be stopped.

Further, the power consumption machine 13 is an energy consumption device capable of directly consuming heat energy.

Further, in order to make the heliostat 1 better reflect the sunlight to the concentrating solar receiver 2 for absorption by the concentrating solar receiver 2, the heliostat 1 is installed in an open area without a shield.

In the concrete implementation mode, as shown in fig. 1, the invention is applied to a certain ferric chloride production enterprise, the heliostat 1 is arranged in an open area without a shelter, and the solar energy is concentrated into the concentrating solar receiver 2 in sunny days, so that the temperature in the concentrating solar receiver 2 reaches above 880 ℃. The storage tank 7 is filled with calcium carbonate particles, the calcium carbonate is conveyed to the concentrating solar receiver 2 at the top of the device through the heat exchange inner tube 4 through the air inlet 8 and decomposed into calcium oxide and carbon dioxide, wherein the carbon dioxide is discharged to the carbon dioxide storage tank 10 from the carbon dioxide outlet 3, the calcium oxide particles enter a gap between the heat exchange outer tube 5 and the heat exchange inner tube 4 and fall back to the storage tank 7 under the action of gravity, and the process is heat absorption. Calcium carbonate transports upwards in heat transfer inner tube 4, and the calcium oxide transports downwards in the clearance between heat transfer inner tube 4 and heat transfer outer tube 5, and calcium oxide accessible heat transfer inner tube 4 wall preheats for calcium carbonate, and heat transfer inner tube 4 forms a double-barrelled heat exchanger against the current with heat transfer outer tube 5. In the storage tank 7, calcium carbonate can be prepared by using calcium oxide which stores solar energy, so that heat is released to supply other energy consumption processes, and the gas temperature of the gas outlet 6 can reach 650 ℃. In the process, carbon dioxide is introduced from the carbon dioxide inlet 9 to improve the flowability of solid particles in the storage tank 7, so that sufficient carbon dioxide is provided for the reaction and the reaction is ensured to be fully performed, and the gas outlet 6 is used for discharging excessive gas in the reaction process and conveying energy to the power consumption machine 13. Solar energy is stored in calcium oxide in the daytime, the energy storage efficiency can reach 90%, energy is released at night to provide energy for other energy consumption processes of a factory, and the energy storage efficiency of the storage system provided by the invention can reach 80%, which is enough to provide energy for the production process of ferric chloride.

Example two:

as shown in fig. 2-4, the second embodiment is different from the first embodiment in that the concentrating solar receiver 2 includes a fixing plate 21, a plurality of first heat-conducting columns 23 are fixedly connected to the bottom end of the fixing plate 21, the plurality of first heat-conducting columns 23 are circumferentially and equidistantly distributed, an absorber plate 22 is disposed between two adjacent first heat-conducting columns 23, the absorber plate 22 is fixedly connected to the first heat-conducting columns 23, and an absorber coating is coated on the absorber plate 22;

the bottom of the first heat conduction column 23 is provided with a conduction block 24, an annular cavity is formed in the conduction block 24, the bottom end of the first heat conduction column 23 extends into the annular cavity and is fixedly connected with a second heat conduction column 26, the second heat conduction column 26 is fixedly sleeved with a plurality of fins 28, the plurality of fins 28 are distributed at equal intervals along the vertical direction, the bottom end of the second heat conduction column 26 is fixedly connected with a heat dissipation block 27, and the middle part of the bottom end of the conduction block 24 is provided with a hot air groove 31;

the bottom end of the conducting block 24 is fixedly connected with a reaction chamber 25, the bottom of the reaction chamber 25 is conical, the inner wall of the top end of the reaction chamber 25 is of an arc-shaped structure, a plurality of annular channels 29 are formed in the top end of the reaction chamber 25, and liquid with good thermal conductivity is filled in the annular channels 29; the heat exchange outer tube 5 is fixedly connected to the bottom end of the reaction chamber 25, the heat exchange outer tube 5 is communicated with the reaction chamber 25, one end of the heat exchange inner tube 4 extends into the reaction chamber 25, and the carbon dioxide outlet 3 is formed in the top of the reaction chamber 25. The inner wall of the top of the reaction chamber 25 is of an arc-shaped structure, calcium oxide particles after calcium carbonate decomposition are favorably dispersed to the edge of the reaction chamber 25 and fall back to the storage tank 7 along the gap between the heat exchange inner tube 4 and the heat exchange outer tube 5, the bottom of the reaction chamber 25 is conical, the diameter of the lower end of the reaction chamber 25 is smaller, the speed of the particles falling back to the storage tank 7 is reduced, and the calcium carbonate particles can stay in the reaction chamber 25 for a longer time to be fully heated and decomposed.

The specific implementation mode is as follows: sunlight reflected by the heliostat 1 irradiates on the heat absorbing plate 22, the heat absorbing plate 22 absorbs heat energy of the sunlight, the heat energy absorbed by the heat absorbing plate 22 is transferred to the first heat conducting column 23, the first heat conducting column 23 transfers the heat energy to the second heat conducting column 26, the fins 28 fixedly sleeved on the second heat conducting column 26 can accelerate the second heat conducting column 26 to absorb the heat energy on the first heat conducting column 23, the heat radiating block 27 dissipates the heat energy on the second heat conducting column 26, meanwhile, the heat dissipation is accelerated by the fins 28, the heat is transferred to the hot air groove 31, liquid with good heat conductivity in the annular pipeline 29 transfers the heat energy into the reaction chamber 25, and the temperature of the reaction chamber 25 can meet the temperature for decomposing calcium carbonate; other processes are consistent with the embodiments and will not be described in great detail herein.

Example three:

as shown in fig. 5, the difference between the third embodiment and the first embodiment is that two ends of the heat exchange inner tube 4 are in a trumpet shape, and the bottom end of the heat exchange inner tube 4 is located right above the air inlet 8.

The bottom end of the heat dissipation inner tube 4 is in a horn shape, so that high-pressure gas can blow calcium carbonate particles in the storage tank 7 into the heat exchange inner tube 4 better; the top end of the heat exchange inner tube 4 is horn-shaped, so that calcium carbonate particles blown out of the heat exchange inner tube 4 can be better dispersed in the concentrating solar receiver 2, the calcium carbonate particles are better heated and decomposed, and the reaction efficiency is improved.

The specific implementation mode is as follows: the third embodiment is the same as the first embodiment, and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.