A tower type photo-thermal and circulating fluidized bed boiler coupling system
Patent Information
- Application Number
- CN202522642897.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-12-12
AI Technical Summary
然而，这些方式存在一定的局限性，例如能源转换效率低，或原料资源供给受限，捕集的二氧化碳难以消纳等问题
本公开所提供的塔式光热与循环流化床锅炉耦合系统，通过设计低温床料光热通道和高温床料光热通道，耦合塔式聚光集热系统、储换热系统和循环流化床锅炉系统，实现了循环流化床煤电机组与太阳能的深度耦合，利用塔式光热技术和固体锅炉床料实现高温低成本储换热，利用太阳能部分甚至全部替代燃煤，同时保持机组的电力系统支撑调节能力，能够满足电力系统绿色低碳转型与安全保供的双重需求。
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Figure CN224887042U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of coal-fired power generation technology, specifically to a tower-type solar thermal and circulating fluidized bed boiler coupling system. Background Technology
[0002] The current socio-economic landscape is transitioning towards a green and low-carbon model. In the energy and power sector, the installed capacity of new energy power generation is growing rapidly, and its share has surpassed that of coal-fired power. However, coal-fired power generation still accounts for more than 50% of total power generation. As an important supporting and regulating power source, coal-fired power will continue to play a supporting and guaranteeing role in power supply for a considerable period of time. Reducing carbon emissions from coal-fired power is of paramount importance to advancing the green and low-carbon transformation process.
[0003] Current technologies for reducing carbon emissions from coal-fired power units primarily employ methods such as co-firing zero-carbon or low-carbon fuels like green hydrogen or green ammonia, and biomass, as well as carbon capture. However, these methods have limitations, such as low energy conversion efficiency, limited raw material supply, and difficulty in utilizing captured carbon dioxide. Constrained by these issues, existing technologies are difficult to scale up and apply, and simultaneously cannot meet the dual demands of a green and low-carbon transformation of the power system and ensuring safe power supply. Utility Model Content
[0004] This disclosure addresses the problems existing in the prior art by providing a tower-type solar thermal and circulating fluidized bed boiler coupling system and its operation method, which can partially or completely solve the problems existing in the prior art and meet the dual needs of green and low-carbon transformation and safe power supply of the power system.
[0005] To achieve the above objectives, the technical solution adopted in this disclosure is as follows: The first aspect of this disclosure provides a tower-type solar thermal and circulating fluidized bed boiler coupling system. The system includes a tower-type concentrating solar collector system, a heat exchange system, a circulating fluidized bed boiler system, a low-temperature bed material solar thermal channel, and a high-temperature bed material solar thermal channel. The tower-type concentrating solar collector system, the heat exchange system, and the circulating fluidized bed boiler system are connected through the low-temperature bed material solar thermal channel and the high-temperature bed material solar thermal channel to form a bed material circulation channel loop. The low-temperature bed material solar thermal channel sequentially includes a low-temperature bed material boiler outlet, a boiler bed material outlet valve, a low-temperature bed material conveyor, a low-temperature storage tank, a low-temperature storage tank outlet valve, a low-temperature bed material elevator, and a solar absorber. The high-temperature bed material solar thermal channel sequentially includes a solar absorber, a solar absorber outlet thermometer, a high-temperature bed material elevator, a high-temperature storage tank inlet valve, a high-temperature storage tank, a high-temperature storage tank outlet valve, a high-temperature bed material conveyor, a boiler bed material inlet valve, and a high-temperature bed material boiler inlet.
[0006] In some embodiments of this disclosure, in the cryogenic bed material solar thermal channel, the cryogenic bed material leaves from the cryogenic bed material boiler outlet and the boiler bed material outlet valve to the cryogenic bed material conveyor, and is transported by the cryogenic bed material conveyor to the cryogenic storage tank for storage; the cryogenic bed material stored in the cryogenic storage tank leaves from the cryogenic storage tank outlet valve to the cryogenic bed material elevator, and is transported by the cryogenic bed material elevator to the solar absorber.
[0007] In some embodiments of this disclosure, in the high-temperature bed material solar thermal channel, the high-temperature bed material leaves the solar absorber and the solar absorber outlet thermometer and goes to the high-temperature bed material elevator, which then transports it to the high-temperature storage tank via the high-temperature storage tank inlet valve for storage. The high-temperature bed material stored in the high-temperature storage tank leaves the high-temperature storage tank outlet valve and goes to the high-temperature bed material conveyor, which then transports it to the high-temperature bed material boiler inlet via the boiler bed material inlet valve.
[0008] In some embodiments of this disclosure, the tower-type concentrating solar thermal system includes a heliostat field, a solar receiver, and a solar receiver outlet temperature gauge.
[0009] In some embodiments of this disclosure, the heliostat field is used to reflect and concentrate solar radiation energy to the heat absorption area of the solar absorber; the solar absorber is used to absorb heat and raise the temperature of the low-temperature bed material to form a high-temperature bed material; and the thermometer at the outlet of the solar absorber is used to measure the temperature of the high-temperature bed material.
[0010] In some embodiments of this disclosure, the heat exchange system includes a high-temperature storage tank, a high-temperature bed material elevator, a high-temperature storage tank inlet valve, a high-temperature storage tank outlet valve, a high-temperature bed material conveyor, a low-temperature storage tank, a low-temperature bed material elevator, a low-temperature storage tank outlet valve, and a low-temperature bed material conveyor.
[0011] In some embodiments of this disclosure, a high-temperature storage tank is used to store high-temperature bed material; a high-temperature bed material elevator is used to transport the high-temperature bed material in the tower concentrating solar collector system to the high-temperature storage tank; and a high-temperature bed material conveyor is used to transport the high-temperature bed material stored in the high-temperature storage tank to the circulating fluidized bed boiler system. Cryogenic storage tanks are used to store cryogenic bed materials; cryogenic bed material elevators are used to transport the cryogenic bed materials stored in the cryogenic storage tanks to the tower-type concentrating solar collector system; cryogenic bed material conveyors are used to transport the cryogenic bed materials in the circulating fluidized bed boiler system to the cryogenic storage tanks.
[0012] In some embodiments of this disclosure, the circulating fluidized bed boiler system includes a boiler bed material inlet valve, a high-temperature bed material boiler inlet, a coal feeding device, a limestone powder feeding device, a circulating fluidized bed boiler, a cyclone separator, a slag cooler, a low-temperature bed material boiler outlet, and a boiler bed material outlet valve.
[0013] In some embodiments of this disclosure, a coal feeding device is used to convey coal into the furnace of a circulating fluidized bed boiler; a limestone powder feeding device is used to convey limestone powder into the furnace of a circulating fluidized bed boiler; the circulating fluidized bed boiler is used to receive the heat energy of the high-temperature bed material or the heat energy released by the combustion of coal to heat the boiler steam-water working fluid inside the boiler to generate high-temperature and high-pressure steam; a cyclone separator is used to separate solid particles carried in the flue gas at the furnace outlet of the circulating fluidized bed boiler; and a slag cooler is used to cool the low-temperature bed material discharged from the circulating fluidized bed boiler after heat exchange.
[0014] In some embodiments of this disclosure, the circulating bed material includes coal ash produced by coal combustion in a circulating fluidized bed boiler system.
[0015] Compared with the prior art, this disclosure has the following beneficial effects: The tower-type solar thermal and circulating fluidized bed boiler coupling system provided in this disclosure, through the design of low-temperature bed material solar thermal channels and high-temperature bed material solar thermal channels, couples the tower-type concentrating solar collector system, the storage and heat exchange system, and the circulating fluidized bed boiler system, realizing the deep coupling of circulating fluidized bed coal-fired power units and solar energy. It utilizes tower-type solar thermal technology and solid boiler bed material to achieve high-temperature and low-cost storage and heat exchange, and uses solar energy to partially or even completely replace coal combustion, while maintaining the power system support and regulation capabilities of the unit. It can meet the dual needs of green and low-carbon transformation of the power system and safe power supply. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of a tower-type solar thermal and circulating fluidized bed boiler coupling system provided in an embodiment of this disclosure.
[0017] Explanation of reference numerals in the attached figures 1. Heliostat field; 2. Solar absorber; 3. High-temperature storage tank; 4. Low-temperature storage tank; 5. Circulating fluidized bed boiler; 6. Low-temperature bed material conveyor; 7. Low-temperature bed material elevator; 8. High-temperature bed material elevator; 9. High-temperature bed material conveyor; 10. High-temperature bed material boiler inlet; 11. Low-temperature bed material boiler outlet; 12. Coal feeding device; 13. Limestone powder feeding device; 14. Cyclone separator; 15. Slag cooler; 16. Boiler bed material outlet valve; 17. Low-temperature storage tank outlet valve; 18. High-temperature storage tank inlet valve; 19. High-temperature storage tank outlet valve; 20. Boiler bed material inlet valve; 21. Solar absorber outlet thermometer. Detailed Implementation
[0018] The present disclosure will now be further described with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present disclosure and should not be construed as limiting the scope of protection of the present disclosure. It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application.
[0019] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.
[0020] This disclosure provides a tower-type solar thermal and circulating fluidized bed boiler coupling system. The system includes a tower-type concentrating solar collector system, a heat storage and exchange system, a circulating fluidized bed boiler system, a low-temperature bed material solar thermal channel, and a high-temperature bed material solar thermal channel. The tower-type concentrating solar collector system, the heat storage and exchange system, and the circulating fluidized bed boiler system are connected through the low-temperature bed material solar thermal channel and the high-temperature bed material solar thermal channel to form a bed material circulation channel loop. The low-temperature bed material solar thermal channel sequentially includes a low-temperature bed material boiler outlet, a boiler bed material outlet valve, a low-temperature bed material conveyor, a low-temperature storage tank, a low-temperature storage tank outlet valve, a low-temperature bed material elevator, and a solar absorber. The high-temperature bed material solar thermal channel sequentially includes a solar absorber, a solar absorber outlet thermometer, a high-temperature bed material elevator, a high-temperature storage tank inlet valve, a high-temperature storage tank, a high-temperature storage tank outlet valve, a high-temperature bed material conveyor, a boiler bed material inlet valve, and a high-temperature bed material boiler inlet.
[0021] The tower-type concentrating solar collector system includes a heliostat field, solar absorbers, a solar absorber outlet temperature gauge, and corresponding pipelines and valves; the heat storage and exchange system includes a high-temperature storage tank, a low-temperature storage tank, a high-temperature bed material conveyor, a high-temperature bed material elevator, a low-temperature bed material conveyor, and a low-temperature bed material elevator; the circulating fluidized bed boiler system adds a high-temperature bed material boiler inlet and a low-temperature bed material boiler outlet.
[0022] like Figure 1 As shown, the tower-type concentrating solar collector system includes a heliostat field 1, a solar absorber 2, and a solar absorber outlet thermometer 21; the heat storage and exchange system includes a high-temperature storage tank 3, a high-temperature bed material elevator 8, a high-temperature storage tank inlet valve 18, a high-temperature storage tank outlet valve 19, a high-temperature bed material conveyor 9, a low-temperature storage tank 4, a low-temperature bed material elevator 7, a low-temperature storage tank outlet valve 17, and a low-temperature bed material conveyor 6; the circulating fluidized bed boiler system includes a boiler bed material inlet valve 20, a high-temperature bed material boiler inlet 10, a coal feeding device 12, a limestone powder feeding device 13, a circulating fluidized bed boiler 5, a cyclone separator 14, a slag cooler 15, a low-temperature bed material boiler outlet 11, and a boiler bed material outlet valve 16.
[0023] This disclosure innovatively proposes to set up a high-temperature bed material boiler inlet 10 and a low-temperature bed material boiler outlet 11 on a circulating fluidized bed boiler, and also innovatively sets up a low-temperature bed material photothermal channel and a high-temperature bed material photothermal channel. Combined with... Figure 1As shown, the low-temperature bed material solar thermal channel starts from the low-temperature bed material boiler outlet 11 and is sequentially connected to the boiler bed material outlet valve 16, the low-temperature bed material conveyor 6, the low-temperature storage tank 4, the low-temperature storage tank outlet valve 17, the low-temperature bed material elevator 7, and the solar absorber 2. The high-temperature bed material solar thermal channel starts from the solar absorber 2 and is sequentially connected to the solar absorber outlet thermometer 21, the high-temperature bed material elevator 8, the high-temperature storage tank inlet valve 18, the high-temperature storage tank 3, the high-temperature storage tank outlet valve 19, the high-temperature bed material conveyor 9, the boiler bed material inlet valve 20, and the high-temperature bed material boiler inlet 10. The low-temperature bed material solar thermal channel and the high-temperature bed material solar thermal channel connect the tower-type concentrating solar collector system, the heat storage and exchange system, and the circulating fluidized bed boiler system, forming a channel loop for the bed material. This enables the absorption, storage, and transfer of solar energy by the circulating fluidized bed boiler bed material, effectively collecting solar energy and converting it into usable thermal energy for the coal-fired power unit.
[0024] In some embodiments, in the cryogenic bed material solar thermal channel, the cryogenic bed material leaves from the cryogenic bed material boiler outlet 11 and the boiler bed material outlet valve 16 to the cryogenic bed material conveyor 6, and is conveyed by the cryogenic bed material conveyor 6 to the cryogenic storage tank 4 for storage; the cryogenic bed material stored in the cryogenic storage tank 4 leaves from the cryogenic storage tank outlet valve 17 to the cryogenic bed material elevator 7, and is conveyed by the cryogenic bed material elevator 7 to the solar absorber 2.
[0025] In some embodiments, in the high-temperature bed material solar thermal channel, the high-temperature bed material leaves the solar absorber 2 and the solar absorber outlet thermometer 21 and goes to the high-temperature bed material elevator 8. The high-temperature bed material elevator 8 then transports the material to the high-temperature storage tank 3 via the high-temperature storage tank inlet valve 18. The high-temperature bed material stored in the high-temperature storage tank 3 leaves the high-temperature storage tank outlet valve 19 and goes to the high-temperature bed material conveyor 9. The high-temperature bed material conveyor 9 then transports the material to the high-temperature bed material boiler inlet 10 via the boiler bed material inlet valve 20.
[0026] In some embodiments, the tower-type concentrating solar thermal system includes a heliostat field 1, a solar receiver 2, and a solar receiver outlet temperature gauge 21.
[0027] Among them, the heliostat field 1 is used to reflect and concentrate solar radiation energy to the heat absorption area of the solar absorber 2; the solar absorber 2 is used to absorb heat and raise the temperature of the low-temperature bed material to form a high-temperature bed material; the solar absorber outlet thermometer 21 is used to measure the temperature of the high-temperature bed material.
[0028] In some embodiments, the heat exchange system includes a high-temperature storage tank 3, a high-temperature bed material elevator 8, a high-temperature storage tank inlet valve 18, a high-temperature storage tank outlet valve 19, a high-temperature bed material conveyor 9, a low-temperature storage tank 4, a low-temperature bed material elevator 7, a low-temperature storage tank outlet valve 17, and a low-temperature bed material conveyor 6.
[0029] Among them, high-temperature storage tank 3 is used to store high-temperature bed material; high-temperature bed material elevator 8 is used to transport high-temperature bed material from the tower concentrating solar collector system to high-temperature storage tank 3; high-temperature bed material conveyor 9 is used to transport the high-temperature bed material stored in high-temperature storage tank 3 to the circulating fluidized bed boiler system; low-temperature storage tank 4 is used to store low-temperature bed material; low-temperature bed material elevator 7 is used to transport the low-temperature bed material stored in low-temperature storage tank 4 to the tower concentrating solar collector system; low-temperature bed material conveyor 6 is used to transport the low-temperature bed material from the circulating fluidized bed boiler system to low-temperature storage tank 4.
[0030] In some embodiments, the circulating fluidized bed boiler system includes a boiler bed material inlet valve 20, a high-temperature bed material boiler inlet 10, a coal feeding device 12, a limestone powder feeding device 13, a circulating fluidized bed boiler 5, a cyclone separator 14, a slag cooler 15, a low-temperature bed material boiler outlet 11, and a boiler bed material outlet valve 16.
[0031] Among them, the coal feeding device 12 is used to transport coal into the furnace of the circulating fluidized bed boiler 5; the limestone powder feeding device 13 is used to transport limestone powder into the furnace of the circulating fluidized bed boiler 5; the circulating fluidized bed boiler 5 is used to receive the heat energy of the high-temperature bed material or the heat energy released by the combustion of coal to heat the boiler steam-water working medium inside the boiler to generate high-temperature and high-pressure steam; the cyclone separator 14 is used to separate solid particles carried in the flue gas at the furnace outlet of the circulating fluidized bed boiler 5; and the slag cooler 15 is used to cool the low-temperature bed material after heat exchange of the high-temperature bed material discharged from the circulating fluidized bed boiler 5.
[0032] In some embodiments, the circulating bed material includes coal ash produced by coal combustion in a circulating fluidized bed boiler system. It should be noted that this disclosure may also use novel bed materials such as quartz sand. When using novel bed materials, the backup fuel can be replaced from coal to fuel oil or natural gas, and backup fuel power generation can be achieved using auxiliary fuel oil guns, thus achieving the same goal of carbon reduction and utilizing existing devices in circulating fluidized bed coal-fired boilers.
[0033] The coupling system provided in this embodiment uses the same heat storage and exchange medium for both the solar thermal component and the circulating fluidized bed boiler. It utilizes the existing bed material and main / auxiliary facilities of the circulating fluidized bed boiler to achieve direct coupling of solar energy and coal-fired thermal energy, eliminating the need for large-scale modifications to coal-fired power units and achieving high-temperature, low-cost heat storage and exchange, as well as low-carbon coal-fired power generation. The heat storage and exchange medium absorbs heat in the solar absorber and is stored in a high-temperature storage tank. When the unit needs to generate electricity, the high-temperature medium directly enters the circulating fluidized bed boiler to generate electricity, and the released low-temperature bed material is returned to the low-temperature storage tank. The circulating fluidized bed boiler in the system can simultaneously serve as a heat exchange device for the bed material's solar thermal energy, coal-fired thermal energy, and the steam-water working fluid. Solar thermal energy and coal-fired thermal energy can be synchronously coupled and released within the boiler, significantly simplifying the system, reducing equipment, and lowering investment. The coupling system can utilize thermal storage, thermal storage coupled with backup fuel, or standby fuel alone to achieve stable power generation.
[0034] The following is an exemplary description of the operation method of the tower-type solar thermal and circulating fluidized bed boiler coupling system provided in this disclosure embodiment. During system operation, a heliostat concentrates sunlight onto the solar absorber. When the solar absorber reaches its start-up temperature, the low-temperature bed material stored in the low-temperature storage tank is transported to the solar absorber by a low-temperature bed material elevator to absorb heat and become high-temperature bed material. The high-temperature bed material, after reaching the required temperature, is then transported by the high-temperature bed material elevator into the high-temperature storage tank for storage. When power generation is required, the high-temperature bed material stored in the high-temperature storage tank is transported into the circulating fluidized bed boiler via a high-temperature bed material conveyor. In the boiler, it transfers heat to the boiler's steam-water working fluid to generate steam for power generation. After cooling, the bed material is further cooled by a slag cooler and then leaves the boiler from the low-temperature bed material boiler outlet. It is then transported back to the low-temperature storage tank via the low-temperature bed material conveyor, completing the cycle. In cases where the heat storage temperature in the high-temperature storage tank does not meet requirements, coal can be simultaneously fed into the boiler while the high-temperature bed material is being transported, achieving coupled operation of solar thermal and coal combustion. Coal is used to supplement the heat gap to meet the unit's operating parameter requirements. When the heat storage in the high-temperature storage tank is exhausted and there is no available sunlight, the boiler bed material inlet valve and boiler bed material outlet valve are closed, the coal feeding device and limestone powder feeding device are operated, and the circulating fluidized bed boiler is switched to coal-fired operation to achieve stable power generation of the unit.
[0035] It should also be noted that the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Terms such as "including" or "contains" mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility of covering other elements as well.
[0036] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.
[0037] Finally, it should be noted that the above content is only used to illustrate the technical solution of this disclosure, and is not intended to limit the scope of protection of this disclosure. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this disclosure do not depart from the substance and scope of the technical solution of this disclosure.
Claims
1. A tower-type solar thermal and circulating fluidized bed boiler coupling system, characterized in that, The system includes a tower-type concentrating solar collector system, a heat storage and exchange system, a circulating fluidized bed boiler system, a low-temperature bed material photothermal channel, and a high-temperature bed material photothermal channel; the tower-type concentrating solar collector system, the heat storage and exchange system, and the circulating fluidized bed boiler system are connected through the low-temperature bed material photothermal channel and the high-temperature bed material photothermal channel to form a bed material circulation channel loop; The low-temperature bed material solar thermal channel includes, in sequence, a low-temperature bed material boiler outlet (11), a boiler bed material outlet valve (16), a low-temperature bed material conveyor (6), a low-temperature storage tank (4), a low-temperature storage tank outlet valve (17), a low-temperature bed material elevator (7), and a solar heat absorber (2). The high-temperature bed material solar thermal channel includes, in sequence, a solar absorber (2), a solar absorber outlet thermometer (21), a high-temperature bed material elevator (8), a high-temperature storage tank inlet valve (18), a high-temperature storage tank (3), a high-temperature storage tank outlet valve (19), a high-temperature bed material conveyor (9), a boiler bed material inlet valve (20), and a high-temperature bed material boiler inlet (10).
2. The system as described in claim 1, characterized in that, In the low-temperature bed material solar thermal channel, the low-temperature bed material leaves from the low-temperature bed material boiler outlet (11) and the boiler bed material outlet valve (16) to the low-temperature bed material conveyor (6), and is transported by the low-temperature bed material conveyor (6) to the low-temperature storage tank (4) for storage; the low-temperature bed material stored in the low-temperature storage tank (4) leaves from the low-temperature storage tank outlet valve (17) to the low-temperature bed material elevator (7), and is transported by the low-temperature bed material elevator (7) to the solar absorber (2).
3. The system as described in claim 1, characterized in that, In the high-temperature bed material solar thermal channel, the high-temperature bed material leaves the solar absorber (2) and the solar absorber outlet thermometer (21) to the high-temperature bed material elevator (8), and is transported by the high-temperature bed material elevator (8) to the high-temperature storage tank (3) via the high-temperature storage tank inlet valve (18); the high-temperature bed material stored in the high-temperature storage tank (3) leaves the high-temperature storage tank outlet valve (19) to the high-temperature bed material conveyor (9), and is transported by the high-temperature bed material conveyor (9) to the high-temperature bed material boiler inlet (10) via the boiler bed material inlet valve (20).
4. The system as described in claim 1, characterized in that, The tower-type concentrating solar thermal system includes a heliostat field (1), a solar absorber (2), and a solar absorber outlet temperature gauge (21).
5. The system as described in claim 4, characterized in that, The heliostat field (1) is used to reflect and concentrate solar radiation energy to the heat absorption area of the solar absorber (2); the solar absorber (2) is used to absorb heat and raise the temperature of the low-temperature bed material to form a high-temperature bed material; the solar absorber outlet thermometer (21) is used to measure the temperature of the high-temperature bed material.
6. The system as described in claim 1, characterized in that, The heat exchange system includes a high-temperature storage tank (3), a high-temperature bed material elevator (8), a high-temperature storage tank inlet valve (18), a high-temperature storage tank outlet valve (19), a high-temperature bed material conveyor (9), a low-temperature storage tank (4), a low-temperature bed material elevator (7), a low-temperature storage tank outlet valve (17), and a low-temperature bed material conveyor (6).
7. The system as described in claim 6, characterized in that, The high-temperature storage tank (3) is used to store high-temperature bed material; the high-temperature bed material elevator (8) is used to transport the high-temperature bed material in the tower-type concentrating solar collector system to the high-temperature storage tank (3); the high-temperature bed material conveyor (9) is used to transport the high-temperature bed material stored in the high-temperature storage tank (3) to the circulating fluidized bed boiler system; Cryogenic storage tank (4) is used to store cryogenic bed material; The cryogenic bed material elevator (7) is used to transport the cryogenic bed material stored in the cryogenic storage tank (4) to the tower-type concentrating solar collector system; The cryogenic bed material conveyor (6) is used to transport the cryogenic bed material in the circulating fluidized bed boiler system to the cryogenic storage tank (4).
8. The system as described in claim 1, characterized in that, The circulating fluidized bed boiler system includes a boiler bed material inlet valve (20), a high-temperature bed material boiler inlet (10), a coal feeding device (12), a limestone powder feeding device (13), a circulating fluidized bed boiler (5), a cyclone separator (14), a slag cooler (15), a low-temperature bed material boiler outlet (11), and a boiler bed material outlet valve (16).
9. The system as described in claim 8, characterized in that, The coal feeding device (12) is used to feed coal into the furnace of the circulating fluidized bed boiler (5); the limestone powder feeding device (13) is used to feed limestone powder into the furnace of the circulating fluidized bed boiler (5); the circulating fluidized bed boiler (5) is used to receive the heat energy of the high-temperature bed material or the heat energy released by the combustion of coal, and heat the boiler steam and water working medium inside the boiler to generate high-temperature and high-pressure steam; the cyclone separator (14) is used to separate the solid particles carried in the flue gas at the furnace outlet of the circulating fluidized bed boiler (5); the slag cooler (15) is used to cool the low-temperature bed material after heat exchange of the high-temperature bed material discharged from the circulating fluidized bed boiler (5).
10. The system as described in any one of claims 1-9, characterized in that, The circulating bed material includes coal ash and slag produced by coal combustion in the circulating fluidized bed boiler system.