Wind power photovoltaic energy storage coupling biomass heat supply device system and operation method

Abstract

The invention provides a wind power and photovoltaic energy storage coupled biomass heat supply device system and an operation method. The wind power and photovoltaic energy storage coupled biomass heat supply device system comprises a new energy power supply module, a solid heat storage device, an electric heating device, a biomass boiler and a steam user. The new energy power supply module comprises a wind power station and a photovoltaic station which are arranged in parallel; the new energy power supply module, the biomass boiler and the steam user are connected in sequence; the new energy power supply module is connected with the electric heating device; the electric heating device is circularly connected with the solid heat storage device; and the solid heat storage device, the biomass boiler and the steam user are circularly connected. According to the wind power and photovoltaic energy storage coupled biomass heat supply device system, the large peak-valley difference generated by wind power and photovoltaic power generation is stabilized from the source, green steam is generated, and green zero-carbon clean heat supply is achieved.

Description

Technical Field

[0001] This invention relates to the field of green zero-carbon clean heating technology, and in particular to a wind power photovoltaic energy storage coupled biomass heating device system and its operation method. Background Technology

[0002] Clean heating from new energy sources is poised to become a vigorously developed heating method due to its low carbon emissions. New energy sources that can be used for heating include wind power heating, photovoltaic power heating, and biomass heating. However, the power generation of new energy sources fluctuates significantly, and biomass heating is costly, failing to meet the stable demands of users.

[0003] CN116085846A discloses a new energy steam and heating system and method. The new energy steam and heating system includes: a photovoltaic-thermal integrated system comprising a photovoltaic-thermal integrated module array, a grid-connected switch, a heat pump grid-source supplementary power switch, an electric thermal storage grid-source supplementary power switch, and a power grid; a heating system comprising a water source heat pump and a heat exchanger; and a thermal storage steam supply system comprising an electric thermal storage boiler system. The photovoltaic-thermal integrated module array works in coordination with the power grid to ensure power supply stability. Feedwater flows into the photovoltaic-thermal integrated module array through pipelines, where the photovoltaic-thermal integrated module array heats the feedwater initially; the water source heat pump heats the feedwater a second time, and the heat exchanger heats the feedwater a third time. The temperature of the feedwater after these three heating processes meets standard requirements, satisfying the heating needs of users.

[0004] CN115143502A discloses a new energy power supply and heating system and method, including: a new energy power supply device, an MPPT circuit, an inverter, a clamping switch and a shunt, an electrode-type hot water boiler, a thermal storage tank, a thermal user load, an electrical user load, an electrical control switch, and a monitoring module; the electrode-type boiler system mainly consists of an electrode-type boiler, a circulating water pump, a constant pressure water supply device, a plate heat exchanger, and circulating pipes; it can significantly reduce greenhouse gas emissions, and by reasonably configuring a thermal storage tank of a certain capacity, it can achieve clean energy green heating and improve the utilization rate of renewable energy.

[0005] CN219177981U discloses a closed system for efficient heating and cooling of distributed photovoltaic energy storage. The device includes a distributed photovoltaic power generation panel array, a photovoltaic DC inverter, a heat transfer medium heater, a low-temperature medium tank, a high-temperature medium tank, a heat exchanger, and steam for heating and cooling. The electric heater converts the electrical energy generated by the photovoltaic power generation into the thermal energy of the heat transfer medium. Heat exchange, waste heat utilization, and wastewater utilization are then achieved during the heating and cooling processes of the heat exchanger and steam. The entire device operates in a continuous cycle.

[0006] However, the aforementioned new energy steam and heat supply systems cannot effectively mitigate the large peak-to-valley difference generated by new energy power generation. Summary of the Invention

[0007] In view of the problems existing in the prior art, the present invention provides a wind power-photovoltaic energy storage coupled biomass heating device system and operation method. By coupling a new energy power supply module, a solid thermal storage device, an electric heating device, and a biomass boiler, a complete green steam production chain system is formed. This system mitigates the large peak-valley difference generated by wind power and photovoltaic power generation at the source, produces green steam, reduces carbon dioxide emissions, and thus achieves the goal of green and clean heating.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] In a first aspect, the present invention provides a wind power photovoltaic energy storage coupled biomass heating device system, the wind power photovoltaic energy storage coupled biomass heating device system including a new energy power supply module, a solid thermal storage device, an electric heating device, a biomass boiler and a steam user;

[0010] The new energy power supply module includes wind farms and photovoltaic farms connected in parallel; the new energy power supply module, biomass boiler and steam user are connected in sequence; the new energy power supply module is connected to an electric heating device; the electric heating device is cyclically connected to a solid thermal storage device; the solid thermal storage device, biomass boiler and steam user are cyclically connected.

[0011] The wind power-photovoltaic energy storage coupled biomass heating device system described in this invention, by setting up an electric heating device and a solid thermal storage device, stores a portion of the green DC power generated by the new energy power supply module in the form of solid medium thermal energy during the off-peak period of grid electricity consumption. During the peak period of grid electricity consumption, the heat stored in the solid thermal storage device is used to heat low-temperature water and then supply it to the biomass boiler. This achieves heat release while mitigating the large peak-valley difference generated by the new energy power supply module from the source, thus realizing green, zero-carbon, and clean heating.

[0012] Preferably, an inverter is installed between the new energy power supply module and the biomass boiler to convert the green DC power generated by the new energy power supply module into AC power.

[0013] Preferably, a circulating fan is provided between the solid thermal storage device and the electric heating device to transport the cold air in the solid thermal storage device to the electric heating device for heating.

[0014] Preferably, a water pump is provided between the steam user and the solid thermal storage device to transport the low-temperature water generated by the steam user to the solid thermal storage device, where it exchanges heat with hot air to become high-temperature water.

[0015] Preferably, the solid thermal storage device is connected to the biomass boiler via a water delivery pipeline.

[0016] Preferably, the biomass boiler is also connected to a biomass fuel conveying device.

[0017] The biomass boiler described in this invention uses various biomass fuels commonly used in the art, such as corn stalks, wheat stalks, or fallen leaves and branches.

[0018] Preferably, the biomass boiler is connected to the steam user via a steam transmission pipeline.

[0019] In a second aspect, the present invention provides an operation method for a wind power photovoltaic energy storage coupled biomass heating device system as described in the first aspect, the operation method comprising an energy storage process and an energy release process.

[0020] Preferably, the energy storage process includes: the new energy power supply module provides electrical energy to the electric heating device and the biomass boiler respectively; the first circulating working fluid in the solid thermal storage device is heated in the electric heating device to become the second circulating working fluid, which is then stored in the solid thermal storage device; and the biomass boiler generates steam to supply steam users.

[0021] In this invention, the temperature of the first circulating working fluid is lower than that of the second circulating working fluid, but the temperatures of the first and second circulating working fluids are not limited in detail and can be adjusted according to actual operating needs.

[0022] Preferably, the energy release process includes the low-temperature water generated by the steam user entering the solid thermal storage device, being heated by the second circulating working fluid, and becoming high-temperature water that enters the biomass boiler.

[0023] Preferably, both the first and second circulating working fluids are air.

[0024] Preferably, the temperature of the low-temperature water is 10~30℃, for example, it can be 10℃, 15℃, 20℃, 25℃, 28℃ or 30℃, etc.

[0025] Preferably, the temperature of the high-temperature water is 200~230℃, for example, it can be 200℃, 205℃, 210℃, 215℃, 220℃ or 230℃.

[0026] The operating method of the wind power-photovoltaic energy storage coupled biomass heating device system described in this invention transmits a portion of the electrical energy generated by the new energy power supply module to the biomass boiler to generate steam for steam users, and transmits another portion of the electrical energy to the electric heating device. The thermal energy is stored in a solid thermal storage device using a circulating working fluid. Subsequently, during the energy release process, the low-temperature water generated by the steam users enters the solid thermal storage device, absorbs heat, and becomes high-temperature water, which then enters the biomass boiler to continue generating steam for steam users. The operating method of this invention converts the green electricity from new energy wind and photovoltaic power into heat, and through the combined use of the electric heating device and the solid thermal storage device, achieves green, zero-carbon, and clean heating.

[0027] As a preferred technical solution of the present invention, the operating method includes an energy storage process and an energy release process;

[0028] The energy storage process includes: the new energy power supply module provides electrical energy to the electric heating device and the biomass boiler respectively; the first circulating working fluid in the solid thermal storage device is heated in the electric heating device to become the second circulating working fluid, which is then stored in the solid thermal storage device; and the biomass boiler generates steam to supply steam users.

[0029] The energy release process includes low-temperature water (10-30°C) generated by the steam user entering the solid thermal storage device, being heated by the second circulating working fluid, and becoming high-temperature water (200-230°C) which then enters the biomass boiler; both the first and second circulating working fluids are air.

[0030] Compared with the prior art, the present invention has at least the following beneficial effects:

[0031] The wind power and photovoltaic energy storage coupled biomass heating device system provided by this invention has a simple structure. By rationally setting the connection relationship between the new energy power supply module, solid thermal storage device, electric heating device, biomass boiler and steam user, it can smooth out the large peak-valley difference generated by wind power and photovoltaic power generation from the source, and generate green steam, reduce carbon dioxide emissions, and achieve the goal of green and clean heating. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a wind power photovoltaic energy storage coupled biomass heating device system in a specific embodiment of the present invention.

[0033] In the diagram: 1-Wind farm; 2-Photovoltaic farm; 3-Inverter; 4-Solid thermal storage device; 5-Biomass boiler; 6-Steam user; 7-Electric heating device; 8-Circulating fan; 9-Feed water pump. Detailed Implementation

[0034] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] The present invention will now be described in further detail. However, the examples described below are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.

[0036] It should be understood that in the description of this invention, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," etc., 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 with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0037] It should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] Those skilled in the art should understand that the present invention necessarily includes the necessary pipelines, conventional valves and general pump equipment for achieving process integrity, but the above content is not the main inventive point of the present invention. Those skilled in the art can add layouts based on process flow and equipment structure selection, and the present invention does not make any special requirements or specific limitations in this regard.

[0039] As a specific embodiment of the present invention, a wind power-photovoltaic energy storage coupled biomass heating device system is provided, the schematic diagram of which is shown below. Figure 1 As shown.

[0040] The wind power, photovoltaic energy storage, and biomass heating system includes a new energy power supply module, a solid thermal storage device 4, an electric heating device 7, a biomass boiler 5, and a steam user 6.

[0041] The new energy power supply module includes a wind farm station 1 and a photovoltaic farm station 2 connected in parallel; the new energy power supply module, the biomass boiler 5, and the steam user 6 are connected in sequence; the new energy power supply module is connected to an electric heating device 7; the electric heating device 7 is cyclically connected to a solid thermal storage device 4; the solid thermal storage device 4, the biomass boiler 5, and the steam user 6 are cyclically connected.

[0042] An inverter 3 is installed between the new energy power supply module and the biomass boiler 5.

[0043] A circulating fan 8 is provided between the solid heat storage device 4 and the electric heating device 7.

[0044] A water pump 9 is installed between the steam user 6 and the solid thermal storage device 4.

[0045] The solid thermal storage device 4 is connected to the biomass boiler 5 via a water delivery pipeline.

[0046] The biomass boiler 5 is also connected to a biomass fuel conveying device.

[0047] The biomass boiler 5 is connected to the steam user 6 via a steam transmission pipeline.

[0048] As a specific embodiment of the present invention, an operation method for the above-mentioned wind power photovoltaic energy storage coupled biomass heating device system is also provided, the operation method including an energy storage process and an energy release process.

[0049] The energy storage process includes: the wind farm 1 and photovoltaic farm 2 in the new energy power supply module generate green DC power, part of which is directly supplied to the electric heating device 7, and the other part of which is converted into green AC power by the inverter 3 and then supplied to the biomass boiler 5; the first circulating working fluid in the solid thermal storage device 4 is heated in the electric heating device 7 to become the second circulating working fluid, and then enters the solid thermal storage device 4 for storage; the biomass boiler 5 generates steam to supply steam users 6.

[0050] In this specific embodiment, the first circulating working fluid is cold air at a temperature of 100°C; the second circulating working fluid is hot air at a temperature of 400°C.

[0051] The energy release process includes the low-temperature water at 20°C generated by the steam user 6 entering the solid thermal storage device 4, being heated by the second circulating working fluid, and becoming high-temperature water at 220°C, which then enters the biomass boiler 5.

[0052] In summary, the wind power-photovoltaic energy storage coupled biomass heating system provided by this invention utilizes green direct current (DC) generated by wind and photovoltaic power plants. This DC is then converted into alternating current (AC) by an inverter to supply steam to a biomass boiler, thereby replacing high-priced grid electricity with low-cost green electricity. The green DC is also fed into an electric heating device, where it is converted into heat energy. This heat energy is stored in a solid thermal energy storage device using air as a circulating medium, mitigating fluctuations in renewable energy levels, preventing wind and solar curtailment, and improving energy utilization. During the energy release process, the low-temperature water generated by the steam user is heated by the solid thermal energy storage device, becoming high-temperature water that enters the biomass boiler. This effectively reduces the amount of biomass fuel required, and the high-temperature water is heated into high-temperature steam for supply to the steam user, achieving green, zero-carbon, and clean heating.

[0053] The present invention is described in detail through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions for the components used in the present invention, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0054] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

Claims

1. A wind power, photovoltaic energy storage, and biomass heating coupling system, characterized in that, The wind power, photovoltaic energy storage, and biomass heating system includes a new energy power supply module, a solid thermal storage device, an electric heating device, a biomass boiler, and a steam user. The new energy power supply module includes wind farms and photovoltaic farms connected in parallel; the new energy power supply module, biomass boiler and steam user are connected in sequence; the new energy power supply module is connected to an electric heating device; the electric heating device is cyclically connected to a solid thermal storage device; the solid thermal storage device, biomass boiler and steam user are cyclically connected.

2. The wind power, photovoltaic energy storage, and biomass heating system according to claim 1, characterized in that, An inverter is installed between the new energy power supply module and the biomass boiler.

3. The wind power, photovoltaic energy storage, and biomass heating system according to claim 1 or 2, characterized in that, A circulating fan is installed between the solid thermal storage device and the electric heating device.

4. The wind power, photovoltaic energy storage, and biomass heating system according to any one of claims 1 to 3, characterized in that, A water supply pump is installed between the steam user and the solid thermal storage device.

5. The wind power, photovoltaic energy storage, and biomass heating system according to any one of claims 1 to 4, characterized in that, The solid thermal storage device is connected to the biomass boiler via a water delivery pipeline.

6. The wind power, photovoltaic energy storage, and biomass heating system according to any one of claims 1 to 5, characterized in that, The biomass boiler is also connected to a biomass fuel conveying device.

7. The wind power, photovoltaic energy storage, and biomass heating system according to any one of claims 1 to 6, characterized in that, The biomass boiler is connected to the steam user via a steam transmission pipeline.

8. A method for operating a wind power, photovoltaic energy storage, and biomass heating system as described in any one of claims 1 to 7, characterized in that, The operating method includes an energy storage process and an energy release process.

9. The operating method according to claim 8, characterized in that, The energy storage process includes: the new energy power supply module provides electrical energy to the electric heating device and the biomass boiler respectively; the first circulating working fluid in the solid thermal storage device is heated in the electric heating device to become the second circulating working fluid, which is then stored in the solid thermal storage device; and the biomass boiler generates steam to supply steam users. Preferably, the energy release process includes the low-temperature water generated by the steam user entering the solid thermal storage device, being heated by the second circulating working fluid, and becoming high-temperature water that enters the biomass boiler.

10. The operating method according to claim 9, characterized in that, Both the first and second circulating working fluids are air; Preferably, the temperature of the low-temperature water is 10~30℃; Preferably, the temperature of the high-temperature water is 200~230℃.

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