CN117928116A - Solid particle heat absorber for solar thermal power generation - Google Patents
Solid particle heat absorber for solar thermal power generation Download PDFInfo
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- CN117928116A CN117928116A CN202410273217.3A CN202410273217A CN117928116A CN 117928116 A CN117928116 A CN 117928116A CN 202410273217 A CN202410273217 A CN 202410273217A CN 117928116 A CN117928116 A CN 117928116A
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Abstract
The invention discloses a solid particle heat absorber for solar thermal power generation, which relates to the field of solar thermal power generation, wherein a heat absorbing mechanism comprises a light-transmitting pipe, a light-transmitting built-in part, a filtering part, a funnel and a first regulating valve, wherein a particle distributor is arranged above the light-transmitting pipe and is used for placing solid particles into the light-transmitting pipe, the funnel is connected to the bottom end of the light-transmitting pipe, the first regulating valve is arranged at the lower part of the funnel, the filtering part is arranged at the bottom in the light-transmitting pipe, the light-transmitting built-in part is filled in the light-transmitting pipe and forms a particle runner, the particle runner enables the solid particles to flow along the gravity direction, the radial direction and the circumferential direction, the filtering part is used for enabling the light-transmitting built-in part to be positioned in the light-transmitting pipe and enabling the solid particles to enter the funnel, and a particle collector is arranged below the funnel. The solid particle heat absorber for solar thermal power generation strengthens the mixing among solid particles, improves the energy flow density of the absorption of the solid particles at the inner side, and improves the heat transfer efficiency and the uniformity of the overall temperature distribution of the solid particles.
Description
Technical Field
The invention relates to the field of solar thermal power generation, in particular to a solid particle heat absorber for solar thermal power generation.
Background
The tower type solar thermal power generation technology has a higher concentration ratio, so that the operation parameters of working media can be effectively improved, and the power generation efficiency of the system is improved, and the tower type solar thermal power generation technology becomes a mainstream technology of solar thermal power generation. In a solar thermal power station, a heat absorber is a key device and is responsible for converting solar radiation energy into heat energy, so that the heat absorber is important for improving the working efficiency of the power station. At present, various heat absorbers have been developed and put into engineering application at home and abroad. The main heat transfer fluid in the heat absorber such as water/steam, heat transfer oil, molten salt and the like has limitations in improving the working efficiency of the solar thermal power station and reducing the operation cost of the power station due to the restriction of the working temperature and chemical characteristics.
In recent years, with development of new efficient heat transfer fluid development work and improvement and optimization of existing fluids, various new efficient heat absorption working media and enhanced heat exchange methods thereof are presented. The ceramic particles, the stone sand, the desert sand and the like have the advantages of wide use temperature range, stable physical and chemical properties, easy acquisition and storage, and capability of being used as heat transfer fluid and heat storage medium simultaneously, and the heat absorber taking the solid particles as the heat transfer fluid creates conditions for improving the efficiency of the solar thermal power station.
Currently, there are various types of solid particle heat absorbers, such as free-fall type, delayed-fall type, rotary kiln type, fluidized bed type, and the like. However, the solid particulate heat absorber of the prior art has the following drawbacks:
(1) Solid particles in the free falling type particle heat absorber without shielding do free falling motion by gravity, the residence time in a sunlight heating section is short, the primary heating temperature is little in rise, repeated heating is needed, the solid particles lack of mixing, the outer layer heated solid particles are extremely easy to be overtemperature, and the heat transfer efficiency is low.
(2) The metal barriers filled in the falling-type particle heat absorber are easy to damage by heating, and the solid particles on the inner side cannot receive solar irradiation, so that the heat absorption of the solid particles is uneven.
Disclosure of Invention
In order to solve the technical problems, the invention provides the solid particle heat absorber for solar thermal power generation, which enhances the mixing among solid particles, improves the energy flow density of the absorption of the solid particles at the inner side, and improves the heat transfer efficiency and the uniformity of the overall temperature distribution of the solid particles.
In order to achieve the above object, the present invention provides the following solutions:
The invention provides a solid particle heat absorber for solar thermal power generation, which comprises a particle distributor, a heat absorbing mechanism and a particle collector, wherein the particle distributor, the heat absorbing mechanism and the particle collector are sequentially arranged from top to bottom, the heat absorbing mechanism comprises a light-transmitting pipe, a light-transmitting built-in part, a filter part, a funnel and a first regulating valve, the particle distributor is arranged above the light-transmitting pipe and is used for placing solid particles into the light-transmitting pipe, the funnel is connected to the bottom end of the light-transmitting pipe, the first regulating valve is arranged at the lower part of the funnel, the filter part is arranged at the bottom in the light-transmitting pipe, the light-transmitting built-in part is filled in the light-transmitting pipe and forms a particle flow channel, the particle flow channel enables the solid particles to flow along the gravity direction, the radial direction and the circumferential direction, the filter part is used for enabling the light-transmitting built-in part to be positioned in the light-transmitting pipe and enabling the solid particles to enter the funnel, and the particle collector is arranged below the funnel and is used for collecting the solid particles.
Preferably, a second regulating valve is arranged at the outlet of the particle dispenser.
Preferably, the light-transmitting built-in part comprises a plurality of first light-transmitting balls with non-identical diameters, and the first light-transmitting balls are freely piled in the light-transmitting tube.
Preferably, the light-transmitting built-in member includes a plurality of second light-transmitting balls having the same diameter, and a plurality of the second light-transmitting balls are stacked in the light-transmitting tube.
Preferably, the light-transmitting built-in part comprises a light-transmitting central column and a plurality of third light-transmitting balls which are sequentially and fixedly sleeved on the light-transmitting central column from top to bottom, the diameters of the third light-transmitting balls which are sequentially arranged from top to bottom become larger, and the diameter of the third light-transmitting ball at the lowest part is smaller than the inner diameter of the light-transmitting tube.
Preferably, the light-transmitting built-in part comprises a light-transmitting central tube and a plurality of light-transmitting components which are sequentially arranged on one side of the light-transmitting central tube from top to bottom, heat preservation cotton is filled between the other side of the light-transmitting central tube and the light-transmitting tubes, each light-transmitting component comprises a plurality of light-transmitting elliptical truncated cones which are arranged along the circumference of the light-transmitting central tube, any two light-transmitting components are arranged adjacent to each other in a staggered mode, and one end, away from the light-transmitting central tube, of each light-transmitting elliptical truncated cone is attached to the inner wall surface of the light-transmitting tube.
Preferably, the filter member is a filter screen, and the mesh aperture of the filter screen is larger than the maximum diameter of the solid particles and smaller than the minimum size of the light-transmitting built-in member.
Preferably, the solid particles are ceramic particles and/or natural sand, and the diameter of the solid particles is 100-2000 mu m.
Preferably, the light-transmitting tube and the light-transmitting built-in part are made of quartz glass, and the visible light transmittance of the light-transmitting tube and the light-transmitting built-in part is greater than or equal to 92%.
Preferably, the heat absorbing mechanism is provided in plurality, the particle dispenser is located above the light transmitting tubes of the plurality of heat absorbing mechanisms, and the particle collector is located below the funnels of the plurality of heat absorbing mechanisms.
Compared with the prior art, the invention has the following technical effects:
According to the application, the length of the solid particle falling circulation channel is prolonged and the flow direction of the solid particles is changed at the same time by arranging the light-transmitting built-in part, so that the falling speed of the solid particles is reduced, the irradiation residence time of the solid particles is obviously prolonged, and the temperature rise of the solid particles in the single falling process is improved. The solid particles have axial, radial and circumferential displacement in the falling process, so that the mixing among the solid particles is enhanced, and the heat transfer efficiency and the uniformity of the temperature distribution of the solid particles are improved. The solar radiation energy flow can reach the solid particles on the inner side through the light-transmitting built-in piece, and the solid particles on the inner side are heated; meanwhile, the light-transmitting built-in part receives solar radiation energy flow and absorbs part of energy to raise the temperature of the light-transmitting built-in part, and the heat exchange of the solid particles on the inner side is enhanced by heating the solid particles in a heat conduction convection radiation mode and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed 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 other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a front view of a solid particle absorber for solar thermal power generation according to an embodiment of the present invention;
fig. 2 is a top view of a heat absorbing mechanism in a solid particle heat absorber for solar thermal power generation according to an embodiment of the present invention;
fig. 3 is a front view of a solid particle absorber for solar thermal power generation according to a second embodiment of the present invention;
fig. 4 is a front view of a solid particle absorber for solar thermal power generation according to a third embodiment of the present invention;
Fig. 5 is a front view of a solid particle absorber for solar thermal power generation according to a fourth embodiment of the present invention;
fig. 6 is a front view of a solid particle absorber for solar thermal power generation according to a fifth embodiment of the present invention;
fig. 7 is a top view of a heat absorbing mechanism in a solid particle heat absorber for solar thermal power generation according to a fifth embodiment of the present invention;
fig. 8 is a front view of a light-transmitting elliptical cone in a solid particle absorber for solar thermal power generation according to a fifth embodiment of the present invention;
Fig. 9 is a side view of a light-transmitting elliptical cone in a solid particle absorber for solar thermal power generation according to a fifth embodiment of the present invention.
Reference numerals illustrate: 1. a particle dispenser; 2. solid particles; 3. a light transmitting tube; 4. a filter; 5. a funnel; 6. a regulating valve; 7. a particle collector; 8. a first light-transmitting sphere; 9. a particle flow channel; 10. solar radiation energy flow; 11. a second light-transmitting sphere; 12. a light-transmitting center column; 13. a third light-transmitting sphere; 14. a light-transmitting central tube; 15. light-transmitting elliptical truncated cone.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a solid particle heat absorber for solar thermal power generation, which enhances the mixing among solid particles, improves the energy flow density of the absorption of the solid particles at the inner side, and improves the heat transfer efficiency and the uniformity of the overall temperature distribution of the solid particles.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Embodiment one:
As shown in fig. 1-2, the embodiment provides a solid particle heat absorber for solar thermal power generation, which comprises a particle distributor 1, a heat absorbing mechanism and a particle collector 7 which are sequentially arranged from top to bottom, wherein the heat absorbing mechanism comprises a light-transmitting pipe 3, a light-transmitting built-in part, a filtering part 4, a funnel 5 and a first regulating valve 6, the particle distributor 1 is arranged above the light-transmitting pipe 3 and is used for placing solid particles 2 into the light-transmitting pipe 3, the funnel 5 is connected to the bottom end of the light-transmitting pipe 3, the first regulating valve 6 is arranged at the lower part of the funnel 5, and the flow rate and the output thermal power of the solid particles 2 can be controlled by arranging the first regulating valve 6. Specifically, the flow of the solid particles 2 in the falling process is adjustable, so that the external output heat power can be stabilized while the external radiation energy flow intensity is adapted to fluctuation, the stable output heat is obtained, and the reliability of the output performance of the equipment is improved.
The filtering piece 4 is arranged at the bottom of the light-transmitting tube 3, the light-transmitting built-in piece is filled in the light-transmitting tube 3 and forms a particle flow channel 9, in the embodiment, a gap between the inner wall surface of the light-transmitting tube 3 and the light-transmitting built-in piece and a gap between the light-transmitting built-in pieces form the particle flow channel 9, and solid particles 2 flow in the particle flow channel 9 under the action of gravity and friction force of the light-transmitting built-in piece; the particle flow channel 9 enables the solid particles 2 to flow along the gravity direction, the radial direction and the circumferential direction, namely, the solid particles 2 flow in multiple directions when flowing through the particle flow channel 9, and in the embodiment, the movement track of the solid particles 2 is changed by the design of the shape of the particle flow channel 9, so that the blending among the solid particles 2 is enhanced. The filter 4 is used for making the light-transmitting built-in part be located in the light-transmitting tube 3 and making solid particles 2 can get into the funnel 5, and the filter 4 is used for supporting the light-transmitting built-in part in this embodiment, and the particle collector 7 is arranged below the funnel 5 and is used for collecting the solid particles 2.
In the embodiment, the length of the falling circulation channel of the solid particles 2 is prolonged by arranging the light-transmitting built-in part, and meanwhile, the flow direction of the solid particles 2 is changed when the solid particles 2 fall, so that the falling speed of the solid particles 2 is reduced, the irradiation residence time of the solid particles 2 is obviously prolonged, and the temperature rise of the solid particles 2 in the single falling process is improved. The solid particles 2 have axial, radial and circumferential displacement in the falling process, so that the mixing among the solid particles is enhanced, and the heat transfer efficiency and the uniformity of the temperature distribution of the solid particles are improved.
The solar radiation energy flow 10 irradiates the solid particles 2 falling down by gravity from top to bottom through the inner wall surface of the light-transmitting tube 3 or through the light-transmitting built-in part. Specifically, the solar radiation energy flow 10 can reach the inner solid particles 2 through the light-transmitting built-in member, and heat the inner solid particles 2; meanwhile, the light-transmitting built-in part receives solar radiation energy flow 10 and absorbs part of energy to raise the temperature of the built-in part, and the heat exchange of the solid particles 2 on the inner side is enhanced by heating the solid particles 2 in a heat conduction convection radiation mode and the like. Therefore, in the embodiment, the light-transmitting built-in part is introduced to improve the energy flow density absorbed by the inner solid particles 2, solve the problems that the inner solid particles 2 cannot receive solar radiation energy and the temperature rises slowly, and improve the uniformity of the overall temperature distribution of the solid particles 2.
In order to facilitate the control of the opening and closing of the outlet of the particle distributor 1, a second regulating valve 6 is arranged at the outlet of the particle distributor 1, and the second regulating valve 6 is used for controlling the inflow of the solid particles 2 into the light-transmitting tube 3.
The filter 4 is a filter screen, which is placed at the joint of the light-transmitting tube 3 and the funnel 5 and is attached to the inner wall surface of the light-transmitting tube 3, and in this embodiment, the filter screen is circular. In order to locate the light-transmitting insert in the light-transmitting tube 3 and to enable the solid particles 2 to enter the funnel 5, the mesh aperture of the filter mesh is larger than the largest diameter of the solid particles 2 and smaller than the smallest dimension of the light-transmitting insert.
The filter screen in this embodiment is a metal filter screen, and the metal filter screen is woven by stainless steel wires and does not deform at high temperature.
The solid particles 2 are ceramic particles and/or natural sand, the physical and chemical properties are stable in the temperature range of-50 ℃ to 1300 ℃ under the aerobic environment, and the diameter of the solid particles 2 is 100 mu m to 2000 mu m.
In this embodiment, the transparent tube 3 and the transparent internal component are made of the same material, and have the same physical performance and chemical performance parameters, so that thermal stress damage caused by temperature change can be avoided, and the problem of thermal stress mismatch is avoided.
Specifically, the light-transmitting tube 3 and the light-transmitting built-in part are both made of quartz glass, and the visible light transmittance of the light-transmitting tube 3 and the light-transmitting built-in part is greater than or equal to 92%.
The light-transmitting tube 3 and the light-transmitting built-in member in this embodiment are a quartz glass tube and a quartz glass built-in member, respectively. The quartz glass material has the advantages of higher material stability and better light transmittance, in particular has extremely strong thermal stability below 800 ℃, extremely small expansion coefficient, better light transmittance in the whole spectrum wave band from ultraviolet to infrared, more than 93% of transmittance in the visible light spectrum region and more than 80% of transmittance in the ultraviolet spectrum region.
In the embodiment, the quartz glass inner part is filled in the quartz glass tube, and the high-efficiency transmission of sunlight among the quartz glass inner part is realized by utilizing the high transmittance characteristic of the quartz glass material to solar spectrum.
The light-transmitting tube 3 in the embodiment is an industrial-grade product with a wall thickness of 3-10 mm, a diameter of 50-200 mm and a length of 1000-6000 mm.
The size of the light-transmitting built-in part is flexible to select, the light-transmitting built-in part can be independently processed, and is matched with light-transmitting pipes 3 with different straightness and cross-section roundness and solid particles 2 with different particle diameters for use, so that the manufacturing difficulty of the solid particle heat absorber is greatly reduced, and the application range of the solid particle heat absorber is widened.
The particle flow channel 9 is used for determining the falling path of the solid particles 2, and the specific structure of the light-transmitting built-in part determines whether the particle flow channel 9 is randomly generated or fixed.
In this embodiment, the light-transmitting inner member includes a plurality of first light-transmitting balls 8 with non-identical diameters, and the plurality of first light-transmitting balls 8 are freely stacked in the light-transmitting tube 3. In this embodiment, the gaps between the inner wall surface of the light-transmitting tube 3 and the first light-transmitting balls 8 and the gaps between the first light-transmitting balls 8 form particle flow channels 9, and the stacking manner of the first light-transmitting balls 8 is not fixed, so that the formed particle flow channels 9 are random.
Specifically, the mesh aperture of the filter screen is smaller than the minimum diameter of the first light-transmitting sphere 8, the diameter of the first light-transmitting sphere 8 is 10 mm-20 mm, and the first light-transmitting sphere 8 is a first quartz glass sphere.
The specific use process is as follows: the particle dispenser 1 is filled with a sufficient quantity of solid particles 2 and the first regulating valve 6 in the lower part of the hopper 5 remains closed. The second regulating valve 6 is opened, the solid particles 2 flow into the light-transmitting tube 3, and after all the solid particles are accumulated, the first regulating valve 6 at the lower part of the funnel 5 is opened, so that the solid particles 2 flow in the light-transmitting tube 3. The solar energy condensing system is started to control solar radiation energy flow 10 input to the outer wall surface of the light-transmitting tube 3, so that the solid particles 2 in the light-transmitting tube 3 are heated. After reaching the outer wall surface of the light-transmitting tube 3, the solar radiation energy flow 10 is reflected in a small part, absorbed in a small part by the light-transmitting tube 3, and transmitted inwards in a large part through the light-transmitting tube 3. If a flowing particle group is encountered, the transmitted solar radiation energy flow 10 transmits radiation energy in the particle group through processes of reflection, absorption, transmission and the like of the particles according to the extinction coefficient of the particle group. The solar radiation energy transmitted through the light-transmitting tube 3 is reflected, absorbed and transmitted in the light-transmitting insert as it encounters the light-transmitting insert. The projected solar radiation energy is substantially absorbed by multiple reflections, absorption and transmission between the flowing solid particles 2 and the stationary light transmissive internals. The light-transmitting built-in part conducts heat transfer with the flowing solid particles 2 in a heat conduction, convection, radiation and other modes, and the flowing solid particles 2 conduct heat exchange in a heat conduction, heat radiation and other modes. The heated solid particles 2 flow through the filter element 4, the funnel 5, the first regulating valve 6 in this order and are collected in the particle collector 7.
Embodiment two:
as shown in fig. 3, the present embodiment differs from the first embodiment in that a plurality of heat absorbing mechanisms are provided, the particle distributor 1 is located above the light transmitting tubes 3 of the plurality of heat absorbing mechanisms, and the particle collector 7 is located below the funnels 5 of the plurality of heat absorbing mechanisms.
In this embodiment, each light-transmitting tube 3 has an independent particle flow channel 9, and the geometric shapes of the particle flow channels 9 in the light-transmitting tubes 3 are random.
Embodiment III:
As shown in fig. 4, the difference between the present embodiment and the first embodiment is the structure of the light-transmitting internal member, in this embodiment, the light-transmitting internal member includes a plurality of second light-transmitting balls 11 with the same diameter, and the plurality of second light-transmitting balls 11 are stacked in a cube in the light-transmitting tube 3. In this embodiment, the gaps between the inner wall surface of the light-transmitting tube 3 and the second light-transmitting balls 11 and the gaps between the second light-transmitting balls 11 form the particle flow channels 9, and the second light-transmitting balls 11 are stacked and fixed, so that the formed particle flow channels 9 are fixed.
Specifically, the mesh aperture of the filter screen is smaller than the diameter of the second light-transmitting sphere 11, the diameter of the second light-transmitting sphere 11 is 10 mm-20 mm, and the second light-transmitting sphere 11 is a second quartz glass sphere.
Embodiment four:
as shown in fig. 5, the difference between the present embodiment and the first embodiment is the structure of the light-transmitting built-in member, in this embodiment, the light-transmitting built-in member includes a light-transmitting central column 12 and a plurality of third light-transmitting balls 13 sequentially and fixedly sleeved on the light-transmitting central column 12 from top to bottom, the diameters of the plurality of third light-transmitting balls 13 sequentially and fixedly arranged from top to bottom become larger, and the diameter of the third light-transmitting ball 13 at the lowest is smaller than the inner diameter of the light-transmitting tube 3. The light-transmitting central column 12 is arranged coaxially with the light-transmitting tube 3 in this embodiment.
In this embodiment, the particle flow channel 9 is formed by the gaps between the inner wall surface of the transparent tube 3 and the transparent center column 12 and the third transparent balls 13, and the gaps between the transparent center column 12 and the third transparent balls 13. The light-transmitting built-in part is an integrally formed quartz glass part, and the formed particle flow channel 9 is fixed.
Specifically, the mesh aperture of the filter mesh is smaller than the diameter of the light-transmitting center pillar 12. The diameter of the light-transmitting center column 12 is 30 mm-160 mm, the radius of the third light-transmitting sphere 13 with the largest size is 10 mm-20 mm, and the ratio of the difference between the radius of the third light-transmitting sphere 13 with the largest size and the smallest size to the radius of the third light-transmitting sphere 13 with the largest size is more than 5%.
Fifth embodiment:
As shown in fig. 6, the difference between the present embodiment and the first embodiment is the structure of the light-transmitting built-in member, in this embodiment, the light-transmitting built-in member includes a light-transmitting central tube 14 and a plurality of light-transmitting components sequentially disposed on one side of the light-transmitting central tube 14 from top to bottom, and heat insulation cotton is filled between the other side of the light-transmitting central tube 14 and the light-transmitting tube 3, that is, in this embodiment, the backlight surface of the light-transmitting built-in member is filled with the space between the light-transmitting central tube 14 and the light-transmitting tube 3 by using the heat insulation cotton.
Each light-transmitting component comprises a plurality of light-transmitting elliptical truncated cones 15 which are circumferentially arranged along the light-transmitting central tube 14, one end of each light-transmitting elliptical truncated cone 15, which is far away from the light-transmitting central tube 14, is attached to the inner wall surface of the light-transmitting tube 3, the light-transmitting elliptical truncated cones 15 of any two adjacent light-transmitting components are arranged in a staggered manner, and the distance between any two adjacent light-transmitting components in the vertical direction is 20-30 mm. In this embodiment, the transparent central tube 14 and the transparent tube 3 are coaxially arranged, and the transparent elliptical truncated cone 15 has a divergent effect on the light rays vertically incident.
In this embodiment, the gaps between the inner wall surface of the transparent tube 3 and the transparent central tube 14 and the transparent elliptical truncated cone 15 and the gaps between the transparent central tube 14 and the transparent elliptical truncated cone 15 form the particle flow channels 9. The light-transmitting built-in part is an integrally formed quartz glass part, and the formed particle flow channel 9 is fixed.
Specifically, the mesh aperture of the filter mesh is smaller than the outer diameter of the light-transmitting central tube 14. The outer diameter of the light-transmitting central tube 14 is 30mm to 160mm.
As shown in fig. 7-9, in this embodiment, 8-10 transparent elliptical truncated cones 15 are arranged on the half circumference of the transparent central tube 14 facing the solar radiation energy flow 10, the major axis of the ellipse of each transparent elliptical truncated cone 15, which is closely attached to the inner wall surface of the transparent tube 3, is 10-20 mm, the minor axis is 5-10 mm, and the height of the transparent elliptical truncated cone 15 is 10-20 mm. The smallest cross section of the light-transmitting elliptical truncated cone 15 is 1/3 of the height of the light-transmitting elliptical truncated cone 15, the major axis of the ellipse of the cross section is 5-10 mm, and the minor axis is 2.5-5 mm. The elliptical long axis of the joint of the light-transmitting elliptical truncated cone 15 and the light-transmitting central tube 14 is 8 mm-16 mm, and the short axis is 4 mm-8 mm. The long axis of the light-transmitting elliptical cone 15 is placed in the horizontal direction or the vertical direction.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (10)
1. The utility model provides a solid particle absorber for solar thermal power generation, its characterized in that includes from top to bottom sets gradually granule distributor, heat absorption mechanism and particle collector, heat absorption mechanism includes light-transmitting pipe, printing opacity built-in part, filter, funnel and first governing valve, granule distributor set up in the top of light-transmitting pipe and be used for to put into solid particle in the light-transmitting pipe, the funnel connect in the bottom of light-transmitting pipe, first governing valve install in the lower part of funnel, the filter set up in bottom in the light-transmitting pipe, the printing opacity built-in part fill in the light-transmitting pipe and form the particle runner, the particle runner makes solid particle can flow along gravity direction, radial and circumference, the filter is used for making printing opacity built-in part is arranged in the light-transmitting pipe and makes solid particle can get into in the funnel, the particle collector set up in the below of funnel and be used for collecting solid particle.
2. The solid particulate heat sink for solar thermal power generation of claim 1, wherein a second regulating valve is provided at an outlet of the particulate distributor.
3. The solid particulate heat sink for solar thermal power generation of claim 1 wherein said light transmissive insert comprises a plurality of first light transmissive spheres of non-identical diameter, a plurality of said first light transmissive spheres being freely stacked in said light transmissive tube.
4. The solid particulate heat sink for solar thermal power generation of claim 1 wherein said light transmissive insert comprises a plurality of second light transmissive spheres of the same diameter, a plurality of said second light transmissive spheres being stacked cubes within said light transmissive tube.
5. The solid particle heat absorber for solar thermal power generation according to claim 1, wherein the light-transmitting built-in member comprises a light-transmitting central column and a plurality of third light-transmitting balls which are fixedly sleeved on the light-transmitting central column from top to bottom in sequence, the diameters of the plurality of third light-transmitting balls which are arranged from top to bottom are sequentially increased, and the diameter of the third light-transmitting ball at the lowest part is smaller than the inner diameter of the light-transmitting tube.
6. The solid particle heat absorber for solar thermal power generation according to claim 1, wherein the light-transmitting built-in part comprises a light-transmitting central tube and a plurality of light-transmitting components sequentially arranged on one side of the light-transmitting central tube from top to bottom, heat preservation cotton is filled between the other side of the light-transmitting central tube and the light-transmitting tube, each light-transmitting component comprises a plurality of light-transmitting elliptical circular truncated cones circumferentially arranged along the light-transmitting central tube, the light-transmitting elliptical circular truncated cones of any two adjacent light-transmitting components are arranged in a staggered mode, and one end of each light-transmitting elliptical circular truncated cone, far away from the light-transmitting central tube, is attached to the inner wall surface of the light-transmitting tube.
7. The solid particulate heat absorber for solar thermal power generation of claim 1 wherein the filter is a filter mesh having mesh apertures larger than a maximum diameter of the solid particulates and smaller than a minimum dimension of the light transmissive insert.
8. The solid particulate heat absorber for solar thermal power generation of claim 1 wherein the solid particulates are ceramic particulates and/or natural sand and the diameter of the solid particulates is 100-2000 μm.
9. The solid particle heat absorber for solar thermal power generation according to claim 1, wherein the light-transmitting tube and the light-transmitting interior member are made of quartz glass, and the visible light transmittance of the light-transmitting tube and the light-transmitting interior member is 92% or more.
10. The solid particulate heat absorber for solar thermal power generation of claim 1 wherein a plurality of said heat absorbing mechanisms are provided, said particulate distributor being located above said light transmitting tubes of a plurality of said heat absorbing mechanisms, said particulate collector being located below said funnels of a plurality of said heat absorbing mechanisms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410273217.3A CN117928116A (en) | 2024-03-11 | 2024-03-11 | Solid particle heat absorber for solar thermal power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410273217.3A CN117928116A (en) | 2024-03-11 | 2024-03-11 | Solid particle heat absorber for solar thermal power generation |
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| CN117928116A true CN117928116A (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410273217.3A Pending CN117928116A (en) | 2024-03-11 | 2024-03-11 | Solid particle heat absorber for solar thermal power generation |
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| Country | Link |
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| CN (1) | CN117928116A (en) |
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