Energy conversion device using rich sunlight

Abstract

The utility model discloses a kind of energy conversion devices using rich wind and light electricity, including air electric heater, hot air heat storage furnace and waste heat boiler by pipeline parallel connection;Air door A and fan A are sequentially connected in series on the pipeline between waste heat boiler and hot air heat storage furnace, air door B and fan B are sequentially connected in series on the pipeline between hot air heat storage furnace and air electric heater;Steam outlet of waste heat boiler is communicated with steam turbine by pipeline, steam turbine is connected and drives generator.The technical scheme of the present application can greatly improve the reliability of the system, reduce the total cost of the system;Using this mode, wind and light fluctuation can be absorbed and compensated while realizing heat and power cogeneration, wherein the absorption hours of full power are determined by the heat storage capacity of hot air heat storage furnace, and the absorption hours of partial power are infinite when heat and power cogeneration is needed. And when there is a gas-fired boiler, there are infinite compensation hours. Therefore, it is not only a shared energy storage power station, but also a power guarantee.

Description

Technical Field

[0001] This utility model relates to the field of energy conversion device technology, specifically to an energy conversion device utilizing abundant wind and solar power. Background Technology

[0002] In China, the cost of wind and solar photovoltaic power generation is now lower than the cost of power generation and heating from natural gas, biomass, or coal nationwide. However, the fluctuation in power output of wind and solar power is the biggest obstacle to their development.

[0003] Using pumped storage power stations and batteries for wind and solar power absorption and compensation has two major drawbacks: first, the cost is high; second, the number of hours of compensation power generation is limited, which cannot meet the long-term need for compensation power under special weather conditions (such as cloudy, rainy, snowy weather with weak winds).

[0004] When the unit heat cost of Fuyu wind and solar power is lower than that of natural gas or even coal, Fuyu wind and solar power can drive waste heat boilers to supply steam for combined heat and power (CHP) and store heat. When there is a power shortage, the stored heat can drive waste heat boilers to supply heat, and the steam generated by the waste heat boilers can be used for CHP. When there is a power shortage and the stored heat is exhausted, the steam generated by gas boilers can be used for CHP. Utility Model Content

[0005] Therefore, this utility model provides an energy conversion device utilizing abundant wind and solar power to solve the aforementioned problems in the prior art. To achieve the above objective, this utility model provides the following technical solution: According to a first aspect of this utility model, an energy conversion device utilizing abundant wind and solar power includes an air electric heater, a hot air thermal storage furnace, and a waste heat boiler connected in parallel via pipelines;

[0006] A damper A and a blower A are connected in series on the pipeline between the waste heat boiler and the hot air thermal storage furnace; a damper B and a blower B are connected in series on the pipeline between the hot air thermal storage furnace and the air electric heater.

[0007] The steam outlet of the waste heat boiler is connected to the steam turbine via a pipeline, and the steam turbine is connected to and drives the generator.

[0008] Furthermore, when there is surplus wind and solar power, the air electric heater is running, and both damper A and damper B are open. The air volume of fan B is greater than that of fan A. After the air is heated, it enters the waste heat boiler to generate steam and also enters the hot air storage furnace for heat storage.

[0009] Furthermore, when there is surplus wind and solar power, the air electric heater is running, and both damper A and damper B are open. The air volume of fan B is the same as that of fan A. After the air is heated, it only enters the waste heat boiler to generate steam, and the hot air storage furnace does not store heat.

[0010] Furthermore, when there is surplus wind and solar power but no need for steam, the air electric heater operates, damper A is closed, fan A is shut down, damper B is opened, fan B operates, and the heated air only enters the hot air storage furnace, while the waste heat boiler is shut down.

[0011] Furthermore, when there is no surplus wind and solar power, the air electric heater stops operating, damper B closes, fan B stops, damper A opens, fan A runs, and the air is heated by the hot air storage furnace and enters the waste heat boiler to produce steam.

[0012] Furthermore, it also includes a gas-fired boiler, the steam outlet of which is connected to a steam turbine.

[0013] Furthermore, when there is no surplus wind and solar power, and the heat of the hot air storage furnace is exhausted, the air electric heater stops operating, dampers A and B are closed, fans A and B are shut down, the hot air storage furnace does not store heat, the waste heat boiler stops operating, and steam is generated in the gas boiler.

[0014] This invention has the following advantages: By utilizing a surplus wind and solar power energy conversion device, the reliability of the system can be greatly improved, and the total system cost reduced. This mode allows for the absorption and compensation of wind and solar power fluctuations while simultaneously achieving combined heat and power (CHP). The number of hours for absorbing full power is determined by the heat storage capacity of the hot air thermal storage furnace. When CHP is required, the number of hours for absorbing a portion of the power is infinitely long. Furthermore, with the assistance of a gas-fired boiler, there are infinitely long compensation hours. Therefore, it serves as both a shared energy storage power station and a backup power source. Because the surplus wind and solar power heat conversion and storage, along with the shared steam turbine generator set for gas, are combined, the system cost is only slightly higher than that of a gas-fired CHP station, but lower than that of pumped storage power stations and battery energy storage power stations. If the gas is biogas, it becomes a zero-carbon shared energy storage power station that also serves as a backup power source. Attached Figure Description

[0015] Figure 1 This is a structural diagram of an energy conversion device utilizing abundant wind and solar power, provided for some embodiments of this utility model.

[0016] Figure 2 This is a schematic diagram illustrating the working condition of an energy conversion device utilizing abundant wind and solar power, where abundant wind and solar power simultaneously heat air to a waste heat boiler and a hot air storage furnace, according to some embodiments of this utility model.

[0017] Figure 3 This is a schematic diagram illustrating the working condition of an energy conversion device utilizing abundant wind and solar power, where the electrically heated air is used to supply heat only to a waste heat boiler when there is abundant wind and solar power.

[0018] Figure 4This is a schematic diagram illustrating the working condition of an energy conversion device utilizing abundant wind and solar power, where the waste heat boiler is shut down and only the hot air storage furnace is supplied with heat for storage when the abundant wind and solar power is used to electrically heat the air.

[0019] Figure 5 This is a schematic diagram illustrating the working condition of a waste heat boiler using the thermal energy stored in a hot air furnace when there is no abundant wind and solar power, according to some embodiments of this utility model.

[0020] Figure 6 This is a schematic diagram illustrating the working condition of an energy conversion device utilizing surplus wind and solar power when there is no surplus wind and solar power and the thermal storage is exhausted, in which the heat energy stored in a gas-fired hot air furnace is used to supply the waste heat boiler.

[0021] In the diagram, 1. Air electric heater, 2. Hot air storage furnace, 3. Waste heat boiler, 4. Steam turbine, 5. Generator, 6. Gas boiler, 7. Damper A, 8. Fan A, 9. Damper B, 10. Fan B, 11. Fuyu wind and solar power, 12. Steam for other purposes, 13. Hot water supply. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Example 1

[0024] like Figures 1 to 6 As shown, an energy conversion device utilizing abundant wind and solar power in the first aspect embodiment of this utility model includes an air electric heater 1, a hot air thermal storage furnace 2, and a waste heat boiler 3 connected in parallel via pipes; a damper A7 and a fan A8 are connected in series on the pipe between the waste heat boiler 3 and the hot air thermal storage furnace 2, and a damper B9 and a fan B10 are connected in series on the pipe between the hot air thermal storage furnace 2 and the air electric heater 1; the steam outlet of the waste heat boiler 3 is connected to a steam turbine 4 via a pipe, and the steam turbine 4 is connected to and drives a generator 5.

[0025] In the above embodiments, it should be noted that the steam turbine 4, generator 5, and gas boiler 6 are subsystems of a traditional gas-fired combined heat and power (CHP) power station; the air heater 1, hot air storage furnace 2, and waste heat boiler 3 are all widely used and technologically mature products; the air heater 1 is commonly used in drying equipment to provide the hot air required for drying products; the hot air storage furnace 2, or simply hot air furnace, is a standard component of blast furnaces, providing high-temperature air for combustion. The high-temperature flue gas generated by the combustion of coal gas first heats the refractory bricks in the hot air storage furnace 2, and then the heat stored in the refractory bricks in the hot air storage furnace 2 heats the air before sending it to the blast furnace as combustion air; the waste heat boiler 3 is a standard component of a gas-fired combined cycle boiler, using the combustion exhaust gas of the gas turbine as the heat source for the steam boiler to generate steam, which drives the steam turbine 4 to drive the generator 5 to generate electricity.

[0026] The technical effects achieved by the above embodiments are as follows: Through an energy conversion device utilizing abundant wind and solar power, the reliability of the system can be greatly improved, and the total cost of the system can be reduced. This mode can achieve combined heat and power (CHP) while simultaneously absorbing and compensating for fluctuations in wind and solar power output. The number of hours for absorbing full power is determined by the heat storage capacity of the hot air thermal storage furnace. When CHP is required, the number of hours for absorbing a portion of the power is infinitely long. Furthermore, with the cooperation of a gas-fired boiler, there are infinitely long compensation hours. Therefore, it serves as both a shared energy storage power station and a backup power source. Because the abundant wind and solar power for heat conversion and storage, and the gas-fired power share a steam turbine generator set, the system cost is only slightly higher than that of a gas-fired CHP station, but lower than that of pumped storage power stations and battery energy storage power stations. If the gas is biogas, it becomes a zero-carbon shared energy storage power station that also serves as a backup power source.

[0027] Example 2

[0028] like Figure 2 As shown, an energy conversion device utilizing abundant wind and solar power includes all the contents of Embodiment 1. In addition, when there is abundant wind and solar power, the air electric heater 1 is running, the damper A7 and damper B9 are both open, the air volume of the fan B10 is greater than the air volume of the fan A8, and the heated air enters the waste heat boiler 3 to generate steam and also enters the hot air storage furnace 2 for heat storage.

[0029] The technical effects achieved by the above embodiments are as follows: when there is a surplus of wind and solar power 11 input, the high-temperature air generated by the air electric heater 1 is sequentially transported to the hot air storage furnace 2 and the waste heat boiler 3. The low-temperature air generated by the waste heat boiler 3 enters the air electric heater 1 sequentially through the damper A7, the fan A8, the damper B9 and the fan B10. The steam generated by the waste heat boiler 3 is used to drive the steam turbine 4 to drive the generator 5 to generate electricity. In addition, the steam generated by the waste heat boiler 3 is also used for other steam purposes 12. The steam turbine 4 can also supply hot water 13.

[0030] Example 3

[0031] like Figure 3 As shown, an energy conversion device utilizing abundant wind and solar power includes all the contents of Embodiment 1. In addition, when there is abundant wind and solar power, the air electric heater 1 is running, the damper A7 and damper B9 are both open, the air volume of the fan B10 is the same as that of the fan A8, and the air is heated and only enters the waste heat boiler 3 to generate steam. The hot air storage furnace 2 does not store heat.

[0032] The technical effects achieved by the above embodiments are as follows: when there is surplus wind and solar power input 11, the high-temperature air generated by the air electric heater 1 is delivered to the waste heat boiler 3. The low-temperature air generated by the waste heat boiler 3 enters the air electric heater 1 in sequence through damper A7, fan A8, damper B9 and fan B10. The steam generated by the waste heat boiler 3 is used to drive the steam turbine 4 to drive the generator 5 to generate electricity. In addition, the steam generated by the waste heat boiler 3 is also used for other steam purposes 12. The steam turbine 4 can also supply hot water 13.

[0033] Example 4

[0034] like Figure 4 As shown, an energy conversion device utilizing abundant wind and solar power includes all the contents of Embodiment 1. In addition, when there is abundant wind and solar power but no steam is needed, the air electric heater 1 is running, the damper A7 is closed, the fan A8 is turned off, the damper B9 is opened, the fan B10 is running, and the heated air only enters the hot air storage furnace 2, while the waste heat boiler 3 is shut down.

[0035] The technical effect achieved by the above embodiment is as follows: when there is surplus wind and solar power input but no steam is needed, the high-temperature air generated by the air electric heater 1 is delivered to the hot air storage furnace 2, and the low-temperature air generated by the hot air storage furnace 2 enters the air electric heater 1 through the damper B9 and the fan B10 in sequence, and the steam turbine 4 and the generator 5 do not work.

[0036] Example 5

[0037] like Figure 5 As shown, an energy conversion device utilizing abundant wind and solar power includes all the contents of Embodiment 1. In addition, when there is no abundant wind and solar power, the air electric heater 1 stops operating, the damper B9 is closed, the fan B10 is shut down, the damper A7 is opened, the fan A8 is running, the air is heated by the hot air storage furnace 2, and enters the waste heat boiler 3 to produce steam.

[0038] The technical effects achieved by the above embodiments are as follows: when there is no surplus wind and solar power input 11, the high-temperature air generated by the hot air storage furnace 2 enters the waste heat boiler 3, and the low-temperature air generated by the waste heat boiler 3 enters the hot air storage furnace 2 in sequence through the damper A7 and the fan A8. The steam generated by the waste heat boiler 3 is used to drive the steam turbine 4 to drive the generator 5 to generate electricity. In addition, the steam generated by the waste heat boiler 3 is also used for other steam purposes 12, and the steam turbine 4 can also supply low-pressure steam or hot water 13.

[0039] Example 6

[0040] like Figure 6 As shown, an energy conversion device utilizing surplus wind and solar power includes all the contents of Embodiment 1, and in addition, it includes a gas boiler 6, the steam outlet of which is connected to a steam turbine 4; when there is no surplus wind and solar power, and the heat of the hot air storage furnace 2 is exhausted, the air electric heater 1 stops operating, the dampers A7 and B9 are closed, the blowers A8 and B10 are shut down, the hot air storage furnace 2 does not store heat, the waste heat boiler 3 stops operating, and steam is generated in the gas boiler 6.

[0041] The technical effects achieved by the above embodiments are as follows: when there is no surplus wind and solar power input 11 and the heat storage of the hot air storage furnace is exhausted, the gas boiler 6 generates steam and inputs it to the steam turbine 4 to drive the generator 5 to generate electricity. In addition, the steam generated by the gas boiler 6 is also used for other steam purposes 12, and the steam turbine 4 can also supply low-pressure steam and hot water 13.

[0042] In the description of this utility model, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0047] In the description of this specification, the references to terms such as "Embodiment 1," "Embodiment 2," "Example," "Specific Example," or "Some Examples," etc., indicate that the specific method, apparatus, or feature described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, methods, apparatus, or features described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An energy conversion device utilizing abundant wind and solar power, characterized in that, It includes an air electric heater (1), a hot air thermal storage furnace (2), and a waste heat boiler (3) connected in parallel via pipes; A damper A (7) and a blower A (8) are connected in series on the pipe between the waste heat boiler (3) and the hot air storage furnace (2), and a damper B (9) and a blower B (10) are connected in series on the pipe between the hot air storage furnace (2) and the air electric heater (1); The steam outlet of the waste heat boiler (3) is connected to the steam turbine (4) through a pipeline, and the steam turbine (4) is connected to and drives the generator (5).

2. The energy conversion device utilizing abundant wind and solar power according to claim 1, characterized in that, When there is abundant wind and solar power, the air electric heater (1) is running, and both the damper A (7) and the damper B (9) are open. The air volume of the fan B (10) is greater than that of the fan A (8). After the air is heated, it enters the waste heat boiler (3) to generate steam and also enters the hot air storage furnace (2) for heat storage.

3. The energy conversion device utilizing abundant wind and solar power according to claim 1, characterized in that, When there is abundant wind and solar power, the air electric heater (1) is running, and both the damper A (7) and the damper B (9) are open. The air volume of the fan B (10) is the same as that of the fan A (8). After the air is heated, it only enters the waste heat boiler (3) to generate steam. The hot air storage furnace (2) does not store heat.

4. The energy conversion device utilizing abundant wind and solar power according to claim 1, characterized in that, When there is surplus wind and solar power but no need for steam, the air electric heater (1) is running, the damper A (7) is closed, the fan A (8) is shut down, the damper B (9) is opened, the fan B (10) is running, and the air is heated and only enters the hot air storage furnace (2), while the waste heat boiler (3) is shut down.

5. The energy conversion device utilizing abundant wind and solar power according to claim 1, characterized in that, When there is no surplus wind and solar power, the air electric heater (1) stops running, the damper B (9) is closed, the fan B (10) is shut down, the damper A (7) is opened, the fan A (8) runs, the air is heated by the hot air storage furnace (2) and enters the waste heat boiler (3), where steam is produced.

6. The energy conversion device utilizing abundant wind and solar power according to claim 1, characterized in that, It also includes a gas-fired boiler (6), whose steam outlet is connected to the steam turbine (4).

7. The energy conversion device utilizing abundant wind and solar power according to claim 6, characterized in that, When there is no surplus wind and solar power, and the heat of the hot air storage furnace (2) is exhausted, the air electric heater (1) stops running, the damper A (7) and damper B (9) are closed, the fan A (8) and fan B (10) are shut down, the hot air storage furnace (2) does not store heat, the waste heat boiler (3) stops running, and steam is generated in the gas boiler (6).

Images