CN210119024U

CN210119024U - Solar receiver

Info

Publication number: CN210119024U
Application number: CN201920406647.2U
Authority: CN
Inventors: 安保林; 郭璐娜; 王俊杰
Original assignee: Technical Institute of Physics and Chemistry of CAS
Current assignee: Zhonglv Zhongke Energy Storage Co ltd
Priority date: 2019-03-27
Filing date: 2019-03-27
Publication date: 2020-02-28
Anticipated expiration: 2029-03-27

Abstract

The utility model relates to a solar energy development technical field provides a solar energy receiver, including fluidizer, air supply, heat-absorbing pipe, fluidizer has a plurality ofly, installs an at least heat-absorbing pipe on every fluidizer, and every fluidizer is equipped with air intake and feed inlet, and every feed inlet is used for supplying with solid particle in to corresponding fluidizer, and every air intake all links to each other with the air supply, and every air intake department installs the control valve that is used for adjusting the intake. The utility model provides a solar receiver, the air current that low temperature solid particle and air supply provided mixes and realizes the fluidization, absorb solar energy when flowing in the heat absorption pipe and form high temperature solid particle, can control the gas flow who gets into in the fluidizer through the adjustment control valve, realize the independence or the independent regulation and control of part of many intraductal velocity of heat absorption, reduce the interference of the gas-solid mixture body flow in-process each other, be convenient for realize the active control of heat absorption process, realize the parallel heat transfer of multitube way, the conversion efficiency of solar energy is improved.

Description

Solar receiver

Technical Field

The embodiment of the utility model provides a relate to solar energy development technical field, especially relate to a solar energy receiver.

Background

The total amount of solar energy resources is rich, and most global energy sources are directly or indirectly from solar energy. However, the energy density of solar energy is low, the utilization efficiency of solar energy resources by the traditional utilization mode needs to be improved, the grade of low-grade heat energy is improved after the low-grade heat energy is focused by the light-gathering solar power generation technology which is widely researched at present, and then the heat energy is converted into electric energy which is convenient to convey and use by utilizing thermodynamic cycle, so that the solar energy utilization technology is an important support technology in the future solar energy utilization field. In order to obtain better thermoelectric conversion efficiency, the heat storage temperature of the concentrating solar power generation system needs to be continuously increased. In the existing solar power generation and heating technologies, the tower type photo-thermal power generation technology can obtain high heat storage temperature of over 1000 ℃, and has the advantages of high light condensation ratio, small limitation by terrain and the like.

The receiver in the whole tower type photo-thermal power generation technology is a core component for obtaining high-grade focusing solar energy, and heat carrying media commonly used in the existing receiver mainly adopt water/steam, air, molten salt and the like, but the temperature difference of a water/steam heat absorption pipe is large, and the pressure in the pipe is overlarge; low air heat capacity and poor heat transfer characteristics; molten salts have problems such as pyrolysis, corrosion, and low-temperature solidification clogging. Therefore, the application of the heat transfer and storage technology of the receiver based on the heat transfer medium to above 700 ℃ has great difficulty.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a solar energy receiver for solve the low and poor problem of heat transfer effect of current light and heat receiver thermal capacity.

In order to solve the technical problem, the utility model provides a solar receiver, including fluidizer, air supply, heat-absorbing pipe, fluidizer has a plurality ofly, every install at least one on the fluidizer the heat-absorbing pipe, every the fluidizer is equipped with air intake and feed inlet, every the feed inlet is used for to corresponding supply with solid particle, every in the fluidizer the air intake all with the air supply links to each other, every air intake department installation is used for adjusting the control valve of intake.

The fluidization device is arranged corresponding to the gas sources one by one.

The air source comprises a blower, the blower is connected with the air inlet through an air pipeline, and the control valve is installed on the air pipeline.

The heat absorption device also comprises a separator, and outlets of the heat absorption pipes are connected with a feed inlet of the separator.

The separator comprises a cyclone separator, an inlet of the cyclone separator is connected with an outlet of the heat absorption pipe, and an air outlet of the cyclone separator is communicated with the atmosphere.

The separator also comprises a gravity separator, a feed inlet of the gravity separator is connected with an outlet of the heat absorption pipe, and a feed inlet of the cyclone separator is connected with a discharge outlet of the gravity separator.

The fluidized bed reactor is characterized by further comprising a feeding bin and a plurality of feeding pipes, wherein one ends of the feeding pipes are respectively connected with the feeding bin, and the other ends of the feeding pipes are respectively connected with the plurality of fluidizing devices in a one-to-one correspondence manner.

The cyclone separator comprises a cyclone separator, and is characterized by further comprising a storage bin, wherein a feed inlet of the storage bin is connected with a discharge outlet of the cyclone separator.

Wherein the outer surface of each heat absorption tube is coated with a selective heat absorption coating.

Wherein the solid particles have a melting point above 600 ℃ and an outer diameter in the range of 5 to 3000 μm.

The utility model provides a solar receiver, low temperature solid particle get into the fluidizer from the feed inlet to mix with the air current that the air supply provided and realize the fluidization, form the gas-solid mixture, the solid particle in the gas-solid mixture absorbs solar energy in the heat absorption pipe and forms high temperature solid particle, thereby convert the light energy of solar energy into heat energy and store in high temperature solid particle; install the control valve in fluidizer's air intake department, can control the gas flow who gets into in the fluidizer through adjusting the control valve, and then the velocity of flow of the intraductal gas-solid mixture of control heat absorption, realize the independence or the partial independent regulation and control of the intraductal velocity of flow of many heat absorption, reduce the mutual interference of the gas-solid mixture flow in-process, be convenient for realize the initiative control of heat absorption process, can make the working medium that flows through the heat absorption pipe obtain 560 ℃ of temperature even higher, realize the parallel heat transfer of multitube way, the conversion efficiency of solar energy is improved.

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 description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a solar receiver according to an embodiment of the present invention.

In the figure: 1. a control valve; 2. a gas source; 3. a heat absorbing tube; 4. a separator; 5. a feeding bin; 6. a feed pipe; 7. a storage bin.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the utility model provides a solar receiver, as shown in fig. 1, it includes fluidizing device, air supply 2 and heat absorption pipe 3. The fluidization device is a plurality of tank bodies or other containers, each fluidization device comprises an air inlet and a feed inlet, wherein a control valve 1 for adjusting the air inlet amount is arranged at the air inlet of the fluidization device; the air inlet is connected with an air source 2, and air is introduced into the fluidizing device through the air source 2; the feed inlet is used for allowing external solid particles to enter the fluidizing device; each fluidization device is provided with at least one heat absorption pipe 3, which can be one heat absorption pipe 3, two heat absorption pipes 3 and ten heat absorption pipes 3, and the system is simplified according to the engineering design requirements.

When the solar energy heat absorption device is used, low-temperature solid particles enter the fluidizing device from the feeding hole and are mixed with air flow provided by the air source 2 to realize fluidization to form a gas-solid mixture, and the solid particles in the gas-solid mixture absorb solar energy in the heat absorption tube 3 to form high-temperature solid particles, so that solar energy light energy is converted into heat energy to be stored in the high-temperature solid particles. The air inlet of the fluidization device is provided with a control valve 1, the flow of the gas entering the fluidization device can be controlled by adjusting the control valve 1, and the flow velocity of the gas-solid mixture in the heat absorption pipe 3 is further controlled. When only one heat absorption pipe 3 is arranged on each fluidizing device, the flow rate of the gas-solid mixture can be independently regulated and controlled among the heat absorption pipes 3 arranged on the fluidizing devices, and no interference exists among the heat absorption pipes; when a plurality of heat absorbing pipes 3 are arranged on each fluidizing device, the flow velocity of the heat absorbing pipe 3 on each fluidizing device can be independently regulated and controlled relative to the heat absorbing pipe 3 on another fluidizing device, so that the independent or partial independent regulation and control of the flow velocity in the heat absorbing pipes 3 are realized, the interference in the flowing process of a gas-solid mixture body among the heat absorbing pipes is reduced, the active control of the heat absorbing process is conveniently realized, the parallel heat transfer of multiple pipelines is realized, and the conversion efficiency of solar energy is improved.

It should be noted that, the gas source 2 in the embodiment of the present invention may only be one, at this time, a plurality of fluidizing devices share one gas source, a gas pipeline is installed on each fluidizing device, a plurality of gas pipelines on a plurality of fluidizing devices are respectively connected with the gas source 2, and a control valve is respectively installed on each gas pipeline. The gas source 2 can also be provided in plurality, for example, a gas line is provided for each fluidizing device, a blower is respectively mounted on the gas inlet of the gas line, and a control valve 1 is respectively mounted on the gas line, whereby the blower is supplied as a gas source to the fluidizing devices through a gas line. The blower can provide air with enough pressure difference and gas flow rate, so that the gas and the solid particles are fully mixed under the control of the control valve 1, and fluidization of the solid particles is ensured.

Specifically, a flow meter is arranged on a gas pipeline between a gas source 2 and the fluidizing device, the flow meter is used for measuring the flow rate of air entering the fluidizing device, a control valve 1 timely adjusts the amount of air provided by the gas source according to the measurement result of the flow meter, and the flow speed of the gas-solid mixture in a heat absorption pipe 3 is adjusted by controlling the supply amount of the air, so that the solid particles fully absorb the heat of solar energy, the phenomenon that the flow is too large and the heat absorption is insufficient to cause that the expected temperature cannot be reached is prevented, and the conversion efficiency of the solar energy is improved.

Besides, the embodiment of the present invention provides a solar energy conversion device, which further comprises a separator 4, wherein the separator 4 is used for separating solid particles and gas in the gas-solid mixture. The separator 4 may be a cyclone separator, the inlet of which is connected to the outlet of the absorber tube 3. The gas-solid mixture formed after the solid particles are fluidized is discharged from the heat absorption pipe 3 and then enters the cyclone separator to be separated into gas and solid, the separated gas is discharged from the gas outlet of the cyclone separator, and the separated solid particles are discharged from the discharge outlet of the cyclone separator.

Wherein, the solid particles are selected from materials with the particle size of 5-3000 μm and the melting point of over 600 ℃, such as quartz sand, olivine, sintered vanadium soil and the like, and also can be selected from particles of silicon carbide, silicon dioxide, alumina and the like, which can be one of the materials or can be formed by mixing a plurality of materials. Because the particle size of particulate matter is great, in order to improve the efficiency of separation, the embodiment of the utility model provides an in 4 still include gravity separator, this gravity separator installs between cyclone and heat-absorbing pipe 3 as one-level separator, cyclone further separates as second grade separator. Specifically, the feed inlet of the cyclone separator is connected with the discharge outlet of the gravity separator, the air outlet of the gravity separator is communicated with the atmosphere, and the feed inlet of the gravity separator is connected with the outlet of the heat absorption pipe 3. The high-temperature solid particles discharged from the heat absorption pipe 3 are firstly primarily separated from air in the gravity separator, and the separated solid discharge enters the cyclone separator for secondary separation, so that the separation effect of the solid particles and the gas is improved.

Additionally, the embodiment of the utility model provides a solar receiver still includes feed bin 5 and conveying pipe 6, and feed bin 5 installs many conveying pipes 6 for the container of saving low temperature solid particle on feed bin 5, and many conveying pipes 6 set up with a plurality of fluidizer one-to-one, and the one end of every conveying pipe 6 links to each other with feed bin 5, and the other end links to each other with fluidizer. The low-temperature solid particles enter each fluidizing device along the feeding pipe 6 to be mixed with air to realize fluidization. Wherein the feed bin 5 is provided with an inlet which is connected to a lifting device for transporting external cryogenic solid particles into the feed bin 5; the feeding pipe 6 adopts a material with a temperature resistance higher than 50 ℃. According to actual demand, a plurality of conveying pipes 6 installed on the feeding bin 5 can be arranged in 1-30 layers along the axial direction.

The surface of each heat absorption pipe 3 is coated with a selective heat absorption coating which is made of heat exchange materials, the temperature resistance of the heat exchange materials is higher than 700 ℃, and the selective heat absorption coating is used for absorbing the heat of solar beams. The solid particles are heat exchanged within the absorber tube 3 by the selective heat absorbing coating. The flow mode of the gas-solid mixture in the heat absorption pipe 3 can be a forward gravity field mode or an inverse gravity field mode, for example, the gas-solid mixture can be processed by a free falling mode, a blocking falling mode, a bubbling fluidization mode, a turbulent fluidization mode or a rapid circulating fluidization mode. The absorber tubes 3 may be arranged in a vertical direction.

In order to receive high-temperature solid particles, the discharge hole of the cyclone separator is connected with a storage bin 7 through a pipeline, the storage bin 7 is a tank body or other storage containers, and the inlet of the storage bin 7 is connected with the discharge hole of the cyclone separator through a pipeline. The solid particles after gas-solid separation by the cyclone separator enter the storage bin 7 through a pipeline.

The embodiment of the utility model provides an in solar receiver, air supply 2, fluidizer, heat-absorbing pipe 3 and cyclone link to each other in order and form gas passage, and gas flows along gas passage, finally discharges into in the environment behind cyclone. The feeding bin 5, the feeding pipe 6, the fluidizing device, the heat absorbing pipe 3, the cyclone separator and the storage bin 7 are sequentially connected to form a conveying pipeline of solid particles, and the solid particles complete a heating process from low temperature to high temperature in the flowing process along the conveying pipeline. When the solid particles absorb heat and exchange heat with the working medium to be heated, the heat can be transferred to the working medium to be heated, and the heat storage performance of the solid particles is stable, so that the heat higher than 600 ℃ can be absorbed under the condition of normal pressure or low pressure, the working medium to be heated can obtain the high temperature of more than 560 ℃ or thousands of ℃, the multi-path parallel high-temperature heat transfer of solar energy is realized, and the heat transfer efficiency is high. The solar receiver can be combined with a heat storage heating system, a heat storage power generation system or an air energy storage system and the like, and heat absorbed by the solid particles is transferred to the corresponding heating system, power generation system or energy storage system.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The solar receiver is characterized by comprising a plurality of fluidizing devices, an air source and heat absorbing pipes, wherein each fluidizing device is provided with at least one heat absorbing pipe, each fluidizing device is provided with an air inlet and a feed inlet, each feed inlet is used for supplying solid particles into the corresponding fluidizing device, each air inlet is connected with the air source, and a control valve for adjusting the air inlet amount is arranged at each air inlet.

2. The solar receiver according to claim 1, wherein there are a plurality of said gas sources, and a plurality of said fluidizing means are provided in one-to-one correspondence with a plurality of said gas sources.

3. The solar receiver according to claim 1 or 2, wherein the gas source comprises a blower connected to the inlet via a gas conduit, the control valve being mounted on the gas conduit.

4. The solar receiver according to claim 1, further comprising a separator, wherein the outlets of the plurality of absorber tubes are each connected to a feed inlet of the separator.

5. The solar receiver according to claim 4, wherein the separator comprises a cyclone separator, an inlet of the cyclone separator is connected to an outlet of the heat absorption tube, and an outlet of the cyclone separator is connected to the atmosphere.

6. The solar receiver of claim 5, wherein the separator further comprises a gravity separator, wherein the inlet of the gravity separator is connected to the outlet of the absorber tube, and wherein the inlet of the cyclone separator is connected to the outlet of the gravity separator.

7. The solar receiver according to claim 1, further comprising a plurality of feeding bins and a plurality of feeding pipes, wherein one end of each of the plurality of feeding pipes is connected with the feeding bin, and the other end of each of the plurality of feeding pipes is connected with the plurality of fluidizing devices in a one-to-one correspondence manner.

8. The solar receiver according to claim 5, further comprising a storage bin having a feed inlet connected to the discharge outlet of the cyclone separator.

9. The solar receiver according to claim 1, wherein an outer surface of each of the heat absorbing tubes is coated with a selective heat absorbing coating.

10. The solar receiver according to claim 1, wherein the solid particles have a melting point above 600 ℃ and an outer diameter in the range of 5 μ ι η to 3000 μ ι η.