CN214665313U - Solar high-temperature particle heat absorber - Google Patents
Solar high-temperature particle heat absorber Download PDFInfo
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- CN214665313U CN214665313U CN202120066589.0U CN202120066589U CN214665313U CN 214665313 U CN214665313 U CN 214665313U CN 202120066589 U CN202120066589 U CN 202120066589U CN 214665313 U CN214665313 U CN 214665313U
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- shaped blocking
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The utility model relates to a solar energy high temperature granule heat absorber, block device, granule export including granule entry, L type blocks the device and has curb plate and bottom plate for block the granule, reduce granule falling speed, the curb plate has the light-facing surface and the backlight surface, the bottom plate is located the light-facing surface of curb plate, granule follow the granule entry gets into, receives the action of gravity whereabouts, meets as the granule during L type blocks the curb plate of device, will along the light-facing surface of curb plate relies on the action of gravity to continue the whereabouts, falls when the granule arrives on the bottom plate, because the hindrance effect of bottom plate has reduced granule falling speed, and the granule is followed the bottom plate falls once more, follows at last the granule export flows, and the granule is constantly heated by focus sunlight at the whereabouts in-process.
Description
Technical Field
The utility model relates to a solar energy high temperature heat utilization especially relates to a solar energy high temperature granule heat absorber.
Background
With the huge consumption of traditional fossil energy, people face increasingly severe energy and environmental problems. A new energy technology revolution is to start with the improvement of energy utilization efficiency and the optimization of energy consumption structure. The improvement of the proportion of non-fossil energy, particularly the proportion of renewable energy, has important significance for future energy and environment. Renewable energy has been the strategic high point of new generation energy technologies. Renewable energy sources include water energy, wind energy, solar energy, biomass energy, geothermal energy, ocean energy, and the like. The solar energy is widely distributed, safe and clean, has huge total amount, is inexhaustible, is widely concerned, and is an important component in renewable energy.
The principle of solar thermal power generation is that an absorber is utilized to convert focused sunlight into high-temperature heat energy which is used as a heat source of power circulation to generate mechanical energy to drive a generator set to generate power. Common solar thermal power generation forms include disc type, trough type and tower type systems. Solar thermal power generation can improve the power generation time and efficiency through low-cost heat storage, and has good power output stability and schedulability. With the great increase of the utilization ratio of renewable energy sources, solar thermal power generation can be used as a base load and a peak shaving power supply, and has an important effect on improving the consumption capacity of a power grid on unstable renewable energy sources such as photovoltaic energy, wind power energy and the like.
Solar thermal power generation technology is more in variety, gradually matures at present, and enters a commercialization stage, but the cost is still higher, the competitiveness is not strong, and technical innovation is urgently needed to improve the efficiency and reduce the cost. The higher the working temperature of the solar thermal power generation, the higher the efficiency. Due to the limitation of the use temperature (565 ℃) of the binary molten salt (60% NaNO3+40% KNO 3) applied to the large scale of solar thermal power generation at the present stage, the requirement of the next generation high-temperature heat storage technology cannot be met, and the further improvement of the working temperature of the power cycle is limited. The next generation of solar thermal power generation technology will have higher operating temperature and higher system efficiency. Taking a steam Rankine cycle as an example, the steam parameter of a steam turbine is increased from 530 ℃ to 550 ℃, the heat consumption of the steam turbine is reduced by 1%, and the generating capacity of a 100 megawatt unit can be increased by nearly 400 ten thousand kilowatt hours all the year round; when the steam parameter reaches 620 ℃, the power generation efficiency can reach 48 percent, which is greatly higher than the Rankine cycle efficiency (-40 percent) in the prior solar thermal power station.
The solid particles used as heat absorption and storage media of high-temperature solar energy have the advantages that: the particles have higher blackness, specific heat capacity and melting temperature, so the solar absorption efficiency is high, the heat storage temperature is high, and the heat storage density is high; the particles are used as a high-temperature heat absorbing medium and a heat storage medium of solar energy, and the solar energy is stored in a high-temperature heat energy mode, so that the continuity and stability of solar thermal power generation are ensured; the particles have strong bearing capacity on the nonuniformity of focused solar faculae, the temperature is more uniform due to the fluidity of the particles, and the influence of thermal stress on the service life of the heat absorber is reduced.
Currently, the particle heat absorbers mainly comprise the following components: curtain, fluidized bed, in-pipe, centrifugal, and the like. For example, in the particle curtain type heat absorber, particles fall freely under the action of gravity from an opening at the top end to form a layer of particle curtain, the particles are directly irradiated and heated by focused sunlight in the falling process, the heated high-temperature particles are stored, the working medium is circulated according to the power required to be heated, and finally electric energy is output outwards; centrifugal particles fall against the wall surface under the action of centrifugal force in the rotating cylinder, and are continuously heated by focused sunlight in the falling process. At present, the particle heat absorber is still in a research stage, mainly faces the problems that the flow and the retention time are not easy to control, the temperature rise per pass is small, the mechanical structure is complex, the large-scale amplification is difficult, the sealing is difficult and the like, and has a great distance from the commercial application.
Disclosure of Invention
The utility model discloses the problem that particle heat absorber scale utilization faced above the needle, provided a solar energy high temperature particle heat absorber and thermal-arrest heat-retaining method, adopted L type to block the device, blockked and then reduce the falling speed from the granule of granule entry whereabouts, blocked the granule that the device continues the whereabouts from L type and further by the heating of focus sunlight, the granule after the heating is followed the granule and is exported the outflow. The L-shaped blocking device can effectively reduce the flow velocity of particles, increase the retention time of the particles and the outlet temperature, and reduce the scattering amount of the particles. The utility model discloses a concrete scheme as follows:
a solar high-temperature particle heat absorber comprises a particle inlet, an L-shaped blocking device and a particle outlet, and is characterized in that the L-shaped blocking device is provided with a side plate and a bottom plate, the side plate is provided with a light facing surface and a backlight surface, the bottom plate is positioned on the light facing surface of the side plate, particles enter from the particle inlet and fall under the action of gravity, when encountering the side plate of the L-shaped blocking device, the particles will continue to fall along the light facing surface of the side plate under the action of gravity, when falling to the bottom plate, due to the blocking effect of the bottom plate, the falling speed of the particles is reduced, the particles fall again from the bottom plate and finally flow out from the particle outlet, and the particles fall from the particle inlet to the particle outlet and are continuously heated by focused sunlight in the flowing process.
Preferably, the solar high-temperature particle heat absorber comprises at least 2L-shaped blocking devices, the L-shaped blocking devices are arranged in series, namely, particles fall from the particle inlet to the 1 st L-shaped blocking device, are blocked by the 1 st L-shaped blocking device to be decelerated and then fall into the 2 nd L-shaped blocking device, the particles fall from the 2 nd L-shaped blocking device, and the like, and finally the particles flow out from the particle outlet. A plurality of L type blocking devices can effectively adjust the residence time of particles according to the power and the opening of the heat absorber, and are convenient for large-scale amplification.
Preferably, the upper end and the lower end of the side plate of each L-shaped blocking device are sequentially connected in series to form an integrated side plate, and the bottom plate of each L-shaped blocking device is sequentially arranged on the light-facing surface of the side plate. When the particles fall from the particle inlet, the particles fall along the light-facing surface of the side plate under the action of gravity, and when the particles meet the blocking action of the bottom plate, the falling speed of the particles is reduced. When the particles fall from the bottom plate of the last L-shaped blocking device, namely, the particles fall along the light-facing surface of the side plate of the next L-shaped blocking device, the particles sequentially encounter the arranged bottom plates to be blocked, and the falling speed is reduced.
Preferably, a side plate of the L-shaped blocking device is in a vertical state, particles fall vertically along the side plate, and a backlight surface of the side plate is provided with a heat insulation layer to reduce heat loss from the backlight surface of the side plate.
Preferably, a side plate of the L-shaped blocking device is in an inclined state, particles fall along the side plate in an inclined manner, and a backlight surface of the side plate is provided with an insulating layer to reduce heat loss from the backlight surface of the side plate.
Preferably, the side plates and the bottom plate are in any one of planes or curved surfaces, and the side plates and the bottom plate are in any one of acute angle, right angle, obtuse angle or curved surface transitional connection.
Further, add entry low temperature granule storage tank, export high temperature granule storage tank, entry low temperature granule storage tank exit linkage the granule entry, granule exit linkage export high temperature granule storage tank import, entry low temperature granule storage tank are used for saving the low temperature granule, export high temperature granule storage tank is used for saving the follow the high temperature granule that the granule export flows out. In addition, a particle flow regulating valve is additionally arranged, the outlet of the inlet low-temperature particle storage tank is connected with the inlet of the particle flow regulating valve, the outlet of the particle flow regulating valve is connected with the particle inlet, and the particle flow regulating valve is used for controlling the particle flow entering the particle inlet to ensure the stable temperature of the particle outlet.
Further, the utility model discloses still include temperature measuring device and feedback device, temperature measuring device arranges in the specific position of granule flow path for measure the granule temperature, feedback device basis the temperature that temperature measuring device surveyed, output signal give granule flow control valve is used for adjusting the entering the granule flow of granule entry guarantees that granule temperature is stable. The particle heat absorber further comprises a heat absorption cavity, the L-shaped blocking device is located in the heat absorption cavity, the heat absorption cavity is provided with an unthreaded hole, and focusing sunlight enters from the unthreaded hole.
The granule heat absorber is the device for utilizing the focused sunlight to heat the solid granules. The utility model discloses utilize L type blocking device, reduce the falling speed of granule effectively, prolong dwell time, guarantee that the granule is focused on the sunlight and shines the heating in the light-facing side always, improve granule exit temperature. The invention can reasonably design the size and the number of the L-shaped blocking devices according to the factors such as the intensity of focused sunlight, the size of light spots, the system power and the like, control the falling time of particles, and further adjust the inclination angle of the side plate of the L-shaped blocking device and the connection mode of the side plate and the bottom plate to adjust the falling time of the particles. The utility model discloses simple structure, the reliability is high, has higher commercialization potentiality.
Drawings
FIG. 1 is a schematic view of specific example 1;
FIG. 2 is a schematic view of embodiment 2;
FIG. 3 is a schematic view of embodiment 3;
FIG. 4 is a schematic view of embodiment 4;
FIG. 5 is a schematic view of the specific example 5;
in the figure: 1-a particle inlet; 2-a side plate of an L-shaped blocking device A; 3-a bottom plate of the L-shaped blocking device A; 4-a particle outlet; 5-L type stop device B side plate; a 6-L-shaped blocking device B bottom plate; 7-particle flow regulating valve; 8-inlet cryogenic particle storage tank; 9-outlet high-temperature particle storage tank.
Detailed Description
Example 1
The utility model provides a solar energy high temperature granule heat absorber, as shown in fig. 1, block device A curb plate 2, L type including granule entry 1, L type and block device A bottom plate 3, granule export 4. The L-shaped blocking device A comprises an L-shaped blocking device A side plate 2 and an L-shaped blocking device A bottom plate 3. The L-shaped blocking device A side plate 2 is provided with a light facing surface and a backlight surface, and the L-shaped blocking device A bottom plate 3 is positioned on the light facing surface of the L-shaped blocking device A side plate 2. The L-shaped blocking device A is used for blocking falling particles, reducing the flow velocity of the particles, increasing the residence time of the particles, enabling the particles to fall on a light-facing surface, receiving the irradiation of focused sunlight and improving the temperature of an outlet of the particles. The particles enter from the particle inlet 1 and fall under the action of gravity, and when the particles meet a side plate 2 of the L-shaped blocking device A, the particles continuously fall along the light-facing surface of the side plate under the action of gravity; when the particles meet the bottom plate 3 of the L-shaped blocking device A, the falling speed of the particles is reduced due to the blocking effect of the bottom plate; the pellets fall again from the bottom plate 3 of the L-shaped stopper a and finally flow out of the pellet outlet 4. The particles are continuously heated by the focused solar radiation as they fall from the particle inlet 1 to the particle outlet 4.
Example 2
According to the specific falling time of the particles, different numbers of L-shaped blocking devices can be arranged so as to achieve the designed falling time of the particles. Fig. 2 is a schematic view of a particulate heat sink with two L-shaped baffles (L-shaped baffle a and L-shaped baffle B) arranged. When the particles fall down from the bottom plate 3 of the L-shaped blocking device A again, the particles continuously fall down along the light-facing surface of the side plate 5 of the L-shaped blocking device B under the action of gravity, when the particles fall down to the bottom plate 6 of the L-shaped blocking device B, the falling speed of the particles is reduced due to the blocking action of the bottom plate, and the particles fall down from the bottom plate again and finally flow out from the particle outlet 4. The two L-shaped blocking devices further increase the falling time of the particles and improve the temperature rise of the particles by single-pass falling heating.
Example 3
As shown in fig. 3, in embodiment 2, the lower end of the side plate 2 of the L-shaped damper a and the upper end of the side plate 5 of the L-shaped damper B are connected in series to form a whole, and the L-shaped damper a base plate 3 and the L-shaped damper B base plate 6 are arranged in this order on the light-receiving surfaces of the side plate 2 and the side plate 5. When the particles fall from the bottom plate 3 of the last L-shaped baffle device A, the particles fall along the light-facing surface of the side plate 5 of the L-shaped baffle device B.
Example 4
As shown in fig. 4, in addition to embodiment 3, the side plates of the combined L-shaped stopper (i.e., the side plate 2 of the L-shaped stopper a and the side plate 5 of the L-shaped stopper B) are arranged at an inclined angle, and the particles entering from the particle inlet 1 slide down obliquely on the light-facing surfaces of the inclined side plates of the combined L-shaped stopper (i.e., the side plate 2 of the L-shaped stopper a and the side plate 5 of the L-shaped stopper B). Therefore, in the falling process of the particles, the particles are not only subjected to the resistance of the bottom plate (the bottom plate 3 of the L-shaped blocking device A and the bottom plate 6 of the L-shaped blocking device B) but also subjected to the friction force of the side plates (the side plate 2 of the L-shaped blocking device A and the side plate 5 of the L-shaped blocking device B) on the particles, so that the falling speed of the particles is further reduced, the retention time of the particles is prolonged, and the temperature rise of the particles during one-way falling heating is improved.
Example 5
As shown in fig. 5, in addition to embodiment 3, a particle flow rate control valve 7, an inlet low-temperature particle tank 8, and an outlet high-temperature particle tank 9 are added. The outlet of the inlet low-temperature particle storage tank 8 is connected with the inlet of the particle flow regulating valve 7, the outlet of the particle flow regulating valve 7 is connected with the particle inlet 1, and the particle outlet 4 is connected with the inlet of the outlet high-temperature particle storage tank 9. Particles enter the particle inlet 1 from the outlet of the inlet low-temperature storage tank 8 through the particle flow regulating valve 7. After the particles are heated by the focused sunlight, the particles flow out of the particle outlet 4 and enter the outlet high-temperature particle storage tank 9. The particle flow regulating valve 7 regulates the particle flow according to the sunlight intensity, and keeps the temperature of the particle outlet stable. When sunlight is increased, the particle flow regulating valve 7 is regulated to increase the particle flow so that the temperature of the particle outlet is kept stable; when the sunlight is weakened, the particle flow regulating valve 7 is regulated to reduce the particle flow, so that the temperature of the particle outlet is kept stable.
The above-mentioned embodiments 1 to 5 are only some embodiments of the present invention, and it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these embodiments. Without deviating from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the related technical features, including the shapes of the side plates and the bottom plate of the L-shaped blocking device and the connection mode therebetween, and a plurality of the relative positions of the L-shaped blocking device, the specific shapes of the particle inlet and the particle outlet, etc., and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims (9)
1. A solar high-temperature particle heat absorber comprises a particle inlet, an L-shaped blocking device and a particle outlet, and is characterized in that the L-shaped blocking device is provided with a side plate and a bottom plate, the side plate is provided with a light facing surface and a backlight surface, the bottom plate is positioned on the light facing surface of the side plate, particles enter from the particle inlet and fall under the action of gravity, when encountering the side plate of the L-shaped blocking device, the particles will continue to fall along the light facing surface of the side plate under the action of gravity, when falling to the bottom plate, due to the blocking effect of the bottom plate, the falling speed of the particles is reduced, the particles fall again from the bottom plate and finally flow out from the particle outlet, and the particles fall from the particle inlet to the particle outlet and are continuously heated by focused sunlight irradiation in the process of the particle outlet.
2. The solar high-temperature particle heat absorber of claim 1, wherein the solar high-temperature particle heat absorber comprises at least 2L-shaped blocking devices, the L-shaped blocking devices are arranged in series, that is, particles fall from the particle inlet to the 1 st L-shaped blocking device, are blocked and decelerated by the 1 st L-shaped blocking device and then fall into the 2 nd L-shaped blocking device, the particles fall from the 2 nd L-shaped blocking device, and so on, and finally flow out from the particle outlet.
3. The solar high-temperature particle heat absorber of claim 2, wherein the upper and lower ends of the side plate of each L-shaped blocking device are sequentially connected in series to form an integrated side plate, and when a particle falls from the bottom plate of the previous L-shaped blocking device, the particle falls along the light-facing surface of the side plate of the next L-shaped blocking device.
4. A solar high-temperature particle heat absorber according to any one of claims 1, 2 or 3, wherein the side plate of the L-shaped blocking device is in a vertical state, particles fall vertically along the side plate, and the backlight surface of the side plate is provided with an insulating layer to reduce heat loss from the backlight surface of the side plate.
5. A solar high-temperature particle heat absorber according to any one of claims 1, 2 or 3, wherein the side plate of the L-shaped blocking device is inclined, particles fall along the side plate in an inclined manner, and the backlight surface of the side plate is provided with an insulating layer to reduce heat loss from the backlight surface of the side plate.
6. The solar high-temperature particle heat absorber of any one of claims 1, 2 or 3, wherein the side plates and the bottom plate are in any one of a plane or a curved surface, and the side plates and the bottom plate are in any one of an acute angle, a right angle, an obtuse angle or a curved surface transition connection.
7. The solar high-temperature particle heat absorber of any one of claims 1, 2 or 3, wherein an inlet low-temperature particle storage tank, an outlet high-temperature particle storage tank and a particle flow regulating valve are additionally arranged, an outlet of the inlet low-temperature particle storage tank is connected with an inlet of the particle flow regulating valve, an outlet of the particle flow regulating valve is connected with the particle inlet, an outlet of the particle flow regulating valve is connected with an inlet of the outlet high-temperature particle storage tank, and the particle flow regulating valve is used for controlling particle flow entering the particle inlet.
8. The solar high-temperature particle thermal absorber according to claim 7, further comprising a temperature measuring device disposed at a specific position of the particle flow path for measuring the temperature of the particles at the specific position, and a feedback device for outputting a signal to the particle flow regulating valve for regulating the flow of the particles entering the particle inlet according to the temperature measured by the temperature measuring device.
9. The solar high-temperature particle heat absorber of any one of claims 1, 2 or 3, further comprising a heat absorption cavity, wherein the L-shaped blocking device is located in the heat absorption cavity, and the heat absorption cavity is provided with an optical hole, and the focused sunlight enters from the optical hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120066589.0U CN214665313U (en) | 2021-01-12 | 2021-01-12 | Solar high-temperature particle heat absorber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120066589.0U CN214665313U (en) | 2021-01-12 | 2021-01-12 | Solar high-temperature particle heat absorber |
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| CN214665313U true CN214665313U (en) | 2021-11-09 |
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| CN202120066589.0U Expired - Fee Related CN214665313U (en) | 2021-01-12 | 2021-01-12 | Solar high-temperature particle heat absorber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114183940A (en) * | 2021-11-30 | 2022-03-15 | 浙江高晟光热发电技术研究院有限公司 | Particle heat absorber with load adjusting function |
| CN114294845A (en) * | 2021-12-31 | 2022-04-08 | 浙江高晟光热发电技术研究院有限公司 | Stepped solid particle heat absorber |
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2021
- 2021-01-12 CN CN202120066589.0U patent/CN214665313U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114183940A (en) * | 2021-11-30 | 2022-03-15 | 浙江高晟光热发电技术研究院有限公司 | Particle heat absorber with load adjusting function |
| CN114183940B (en) * | 2021-11-30 | 2023-08-08 | 浙江高晟光热发电技术研究院有限公司 | Particle heat absorber with load adjusting function |
| CN114294845A (en) * | 2021-12-31 | 2022-04-08 | 浙江高晟光热发电技术研究院有限公司 | Stepped solid particle heat absorber |
| CN114294845B (en) * | 2021-12-31 | 2023-10-03 | 浙江高晟光热发电技术研究院有限公司 | Stepped solid particle heat absorber |
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