Biomass energy storage heat supply system and operation method

Abstract

The invention relates to the technical field of energy storage and heat supply, in particular to a biomass energy storage and heat supply system and an operation method, and the biomass energy storage and heat supply system comprises a biomass energy storage unit and a power generation and heat supply unit. The biomass energy storage unit comprises a crushing mechanism, a drying and carbonizing mechanism and a forming and granulating mechanism, and biomass raw materials become biomass fuel through the crushing mechanism, the drying and carbonizing mechanism and the forming and granulating mechanism. The power generation and heat supply unit comprises a wind power generation mechanism and a photovoltaic power generation mechanism, and electric energy generated by the power generation and heat supply unit is used for park power utilization and equipment operation of the biomass energy storage unit. The operation method comprises the steps that electric energy generated by the power generation and heat supply unit is subjected to system configuration according to a load-following-source strategy, on the basis that the park electricity utilization requirement is met, starting, stopping and power of equipment operation of the biomass energy storage unit are dynamically adjusted, and green electricity is stored with biomass as a carrier in time. The biomass energy storage heat supply system can consume wind and light for power generation by applying the operation method, and the energy utilization rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage heating, and in particular to a biomass energy storage heating system and an operation method thereof. Background Art

[0002] The randomness and volatility of wind and solar energy cause the output of renewable energy power to fluctuate in power and frequency. The low power quality places high demands on the flexibility and safe and stable operation of the power grid. At the same time, there are peak and valley phenomena in the use of electricity, which makes it difficult to match the timing of renewable energy power generation. Ultimately, renewable energy power generation is often wasted because it cannot be absorbed in time due to power demand and grid operation safety considerations. Summary of the invention

[0003] One object of the present invention is to provide a biomass energy storage heating system that can timely absorb wind and solar power generation and improve energy utilization.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A biomass energy storage heating system is provided, comprising:

[0006] The biomass energy storage unit includes a crushing mechanism, a drying and carbonizing mechanism and a molding and granulating mechanism. The biomass raw material becomes biomass fuel after passing through the crushing mechanism, the drying and carbonizing mechanism and the molding and granulating mechanism.

[0007] The power generation and heating unit comprises a wind power generation mechanism and a photovoltaic power generation mechanism. The electric energy generated by the power generation and heating unit is used for park electricity consumption and equipment operation of the biomass energy storage unit.

[0008] Optionally, the power generation and heat supply unit also includes a biomass combustion mechanism and a steam power generation mechanism. The raw material of the biomass combustion mechanism is the biomass fuel, the steam heated by the biomass combustion mechanism is input into the steam power generation mechanism, and the electric energy generated by the steam power generation mechanism is used for park electricity consumption.

[0009] Optionally, the power generation and heat supply unit further includes a park heating mechanism, and the steam heated by the biomass combustion mechanism is input into the park heating mechanism.

[0010] Optionally, the steam output by the park heating mechanism is used to heat the material in the drying and carbonizing mechanism.

[0011] Optionally, the tail gas of the biomass combustion mechanism is used to heat the material in the drying and carbonization mechanism.

[0012] Optionally, an electrochemical energy storage unit is also included, and part of the electric energy generated by the power generation and heat supply unit is stored in the electrochemical energy storage unit.

[0013] Optionally, the drying and carbonization mechanism includes a drying device, which is used to heat and dry the material, and the material inlet and material outlet of the drying device are located at the same end.

[0014] Optionally, the drying device includes an inner cylinder and an outer cylinder which are arranged in a sleeve, the inner cylinder and the outer cylinder are both arranged horizontally and rotate synchronously, the inner wall of the inner cylinder has a first feed plate, the inner wall of the outer cylinder has a second feed plate, the first feed plate is arranged along a first spiral direction, the second feed plate is arranged along a second spiral direction, the first spiral direction is opposite to the second spiral direction, one end of the inner cylinder is the feed inlet, one end of the outer cylinder protrudes axially from the other end of the inner cylinder, and the other end of the outer cylinder is the feed outlet.

[0015] Optionally, the drying and carbonizing mechanism further includes a gas collecting device, and the gas collecting device is connected to one end of the outer cylinder.

[0016] Another object of the present invention is to provide an operating method that can timely absorb wind and solar power generation and improve energy utilization.

[0017] To achieve this object, the present invention adopts the following technical solutions:

[0018] An operating method is provided, which is applied to the above-mentioned biomass energy storage heating system, and the operating method comprises:

[0019] The electric energy generated by the power generation and heating unit is configured according to the load-follow-source strategy. On the basis of meeting the electricity demand of the park, the start and stop of the equipment operation and the power of the biomass energy storage unit are dynamically adjusted to store green electricity in a timely manner using biomass as a carrier.

[0020] Beneficial effects of the present invention:

[0021] The present invention provides a biomass energy storage and heating system, including a biomass energy storage unit and a power generation and heating unit. The biomass energy storage unit includes a crushing mechanism, a drying and carbonizing mechanism, and a molding and granulating mechanism. The biomass raw material becomes a biomass fuel after passing through the crushing mechanism, the drying and carbonizing mechanism, and the molding and granulating mechanism. The power generation and heating unit includes a wind power generation mechanism and a photovoltaic power generation mechanism. The electric energy generated by the power generation and heating unit is used for park electricity and equipment operation of the biomass energy storage unit. The biomass energy storage and heating system utilizes the biomass pretreatment process to store part of the electric energy generated by wind and solar power generation, and can timely absorb wind and solar power generation to improve energy utilization.

[0022] The present invention also provides an operation method, which is applied to the above-mentioned biomass energy storage heating system, and the operation method includes: the electric energy generated by the power generation and heating unit is configured according to the load-follow-source strategy, and on the basis of meeting the power consumption of the park, the start and stop of the equipment operation and the power of the biomass energy storage unit are dynamically adjusted to store green electricity in a timely manner using biomass as a carrier. The above-mentioned biomass energy storage heating system applies this operation method, which can timely absorb wind and solar power generation, avoid energy waste, and improve energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of a biomass energy storage heating system provided by an embodiment of the present invention;

[0024] Figure 2 It is a structural schematic diagram of a drying and carbonizing mechanism provided in an embodiment of the present invention.

[0025] In the figure:

[0026] 1. Crushing mechanism;

[0027] 2. Drying and carbonizing mechanism; 21. Drying device; 211. Inner cylinder; 212. Outer cylinder; 213. Heating assembly; 214. Driving assembly; 22. Gas collecting device; 23. Feeding and discharging device;

[0028] 3. Molding and granulation mechanism; 4. Wind power generation mechanism; 5. Photovoltaic power generation mechanism; 6. Biomass combustion mechanism; 7. Steam power generation mechanism; 8. Park heating mechanism;

[0029] 900. Biomass raw materials. DETAILED DESCRIPTION

[0030] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0031] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0032] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0033] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0034] In the present application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0035] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0036] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0037] Biomass has problems such as low volume density and energy density, too dispersed distribution, difficulty in collection, and relatively high transportation and storage costs, which greatly limit the effective use of biomass energy. Due to seasonal factors, biomass supply is unstable, which makes large-scale industrial use difficult. The composition properties of biomass vary greatly. For example, biomass has huge differences in chemical composition such as moisture content, calorific value and ash, which makes it difficult to use biomass. In order to overcome these challenges and make biomass suitable for large-scale industrial applications, the biomass raw materials must be pretreated. Through pretreatment processes such as crushing, drying, carbonization, and molding, the biomass is converted into standardized molded fuels of uniform size, easy to store and transport, and suitable for industrial applications. In this process, a large amount of electricity is consumed.

[0038] In essence, the pretreatment process of biomass raw materials is an energy storage process. The pretreated biomass fuel products store two parts of energy. One part is the conversion of solar energy into chemical energy through photosynthesis during plant growth and stored in the biomass raw materials. The other part is the conversion of electrical energy into mechanical energy or chemical energy during the pretreatment of biomass raw materials and stored in the biomass fuel. Traditional biomass fuels include biomass pellets, biomass briquettes, etc. In the actual production process, the power consumption cost of equipment such as crushing, drying, carbonization, and molding accounts for a large proportion of the total operating cost of the factory.

[0039] Due to the intermittent nature of wind power generation, the power output of wind power generation is also intermittent. Photovoltaic power generation is affected by the intensity and angle of sunlight, which is strongly related to climate, season, and region. Even the changes within a day are very obvious and highly random. The power grid requires stable and smooth input, while wind power and photovoltaic power generation are random and intermittent, which has a great impact on the power grid. After access, it will have an impact on the power grid and bring potential unsafe factors. In addition, intermittency will reduce the utilization rate of transmission equipment. The randomness and volatility of wind and solar energy cause the output of new energy power to fluctuate continuously in power and frequency. The lower power quality puts forward higher requirements for the flexibility and safe and stable operation of the power grid. At the same time, there is a valley peak phenomenon in the use of electricity, which is difficult to match with the timing of new energy power generation. Ultimately, new energy power generation is often wasted because it cannot be absorbed in time due to power demand and grid operation safety considerations. Wind and solar power generation needs to be balanced with peak shaving or energy storage resources.

[0040] In order to cope with the impact that large-scale access to renewable energy power generation may have on the power grid, on the one hand, traditional thermal power and other sources need to play a basic role in ensuring power supply and participate in joint peak regulation. More importantly, energy storage technology should be introduced to increase the flexibility of the power supply side. Common energy storage methods include electrochemical energy storage, pumped storage, compressed air energy storage, etc. However, for larger-scale wind power and photovoltaic new energy bases, the above technologies all have certain technical difficulties. For example, electrochemical energy storage has high costs, short service life, and potential fire risks; pumped storage efficiency is low and is significantly restricted by geographical location; compressed air energy storage requires a heat dissipation system. The shortcomings of existing technologies have put forward an urgent need for new energy storage methods that are cheap, reliable, and highly adaptable.

[0041] Therefore, this embodiment aims to provide a biomass energy storage and heating system, which adopts wind and solar complementary new energy to provide green electricity for biomass pretreatment operations, and based on the load-follow-source strategy, stores green electricity in biomass fuel, and uses it as a zero-carbon alternative fuel in the power and heating systems, as a long-term and long-distance energy storage method, so as to achieve the purpose of solving the above-mentioned shortcomings and problems, provide effective solutions for the low-carbon transformation of high-carbon emission industries such as thermal power, metallurgy, and building materials, and provide a renewable carbon source for the preparation of green alcohol-based liquid fuels.

[0042] like Figure 1-Figure 2As shown, the biomass energy storage and heating system of this embodiment includes a biomass energy storage unit and a power generation and heating unit. Among them, the biomass energy storage unit includes a crushing mechanism 1, a drying and carbonizing mechanism 2 and a molding and granulating mechanism 3. The biomass raw material 900 passes through the crushing mechanism 1, the drying and carbonizing mechanism 2 and the molding and granulating mechanism 3 to become a biomass fuel. The power generation and heating unit includes a wind power generation mechanism 4 and a photovoltaic power generation mechanism 5. The electric energy generated by the power generation and heating unit is used for park electricity and equipment operation of the biomass energy storage unit. The biomass energy storage and heating system utilizes the biomass pretreatment process to store part of the wind and solar power generation electricity, which can timely absorb wind and solar power generation and improve energy utilization.

[0043] The biomass energy storage and heating system uses biomass as a carrier and the biomass pretreatment process as a new energy input process to explore a new energy storage method to solve the problems of wind and solar power consumption, green electricity conversion and biomass industrial raw material transformation. Biomass molding is a common biomass pretreatment method. Through pretreatment processes such as crushing, drying, carbonization, and molding, biomass is converted into molded fuels of uniform size, easy to store and transport, and suitable for industrial applications. A large amount of electricity is consumed in this process. Introducing biomass molding technology into the field of energy storage, using new energy power generation to drive biomass pretreatment, and adopting a load-follow-source strategy, the electricity that cannot be consumed is stored in the form of stable chemical energy in biomass fuel products, and then providing stable and controllable electricity to the power grid or heating for the park as needed, so as to achieve stable, controllable and continuous output of new energy power generation and reduce the impact on the power grid. In addition, the processed biomass fuel can also be exported as a renewable chemical, providing a more feasible technical route for the consumption of new energy.

[0044] Optionally, the power generation and heat supply unit also includes a biomass combustion mechanism 6 and a steam power generation mechanism 7. The raw material of the biomass combustion mechanism 6 is biomass fuel, which can be directly obtained through the biomass energy storage unit to avoid energy consumption in long-distance transportation. The steam heated by the biomass combustion mechanism 6 is input into the steam power generation mechanism 7, and the electric energy generated by the steam power generation mechanism 7 is used for electricity consumption in the park. That is, the power generation and heat supply unit includes three sources of electric energy, namely wind power generation, photovoltaic power generation and biomass combustion heating steam power generation. Biomass combustion heating steam power generation can ensure the stability of electricity consumption in the park, store the highly random wind and solar energy in biomass fuel, and then burn and release it to generate electricity, so that the highly random energy can be converted into actively controllable energy to achieve stable power supply.

[0045] Optionally, the park is equipped with a microgrid, and wind and solar power generation is input into the park's microgrid. At the same time, the park is also equipped with a power grid connected to the outside world to ensure that all kinds of power demand in the park are met. The microgrid is also laid in the biomass energy storage unit, which can provide the power required for the operation of the equipment of the biomass energy storage unit. The power output by the steam power generation mechanism 7 is stable and can be directly incorporated into the power grid connected to the outside world.

[0046] Optionally, the power generation and heating unit further includes a park heating mechanism 8, and the steam heated by the biomass combustion mechanism 6 is input into the park heating mechanism 8. That is, part of the steam is input into the steam power generation mechanism 7 to provide the electric energy required by the park, and part of the steam is input into the park heating mechanism 8 to ensure the heating of the park.

[0047] Optionally, the steam output by the park heating mechanism 8 is used to heat the material in the drying and carbonizing mechanism 2. That is, the waste heat of the steam output by the park heating mechanism 8 can be further utilized in the heating, drying and carbonizing mechanism 2 to prevent this part of heat from being dissipated, and the introduction of steam can reduce the power consumption of the heating, drying and carbonizing mechanism 2, and can simultaneously improve the utilization rate of low-grade thermal energy and high-grade electrical energy.

[0048] Optionally, the tail gas of the biomass combustion mechanism 6 is used to heat the materials in the drying carbonization mechanism 2. That is, the waste heat of the high-temperature tail gas of the biomass combustion mechanism 6 can also be further utilized in the heating, drying and carbonization mechanism 2 to prevent this part of heat from being dissipated, and can further reduce the power consumption of the heating, drying and carbonization mechanism 2, and further improve the utilization rate of low-grade thermal energy and high-grade electrical energy.

[0049] Optionally, the biomass energy storage and heating system also includes an electrochemical energy storage unit, and part of the electric energy generated by the power generation and heating unit is stored in the electrochemical energy storage unit. If there is a difference between the wind and solar power generation and the green electricity that can be consumed by the biomass energy storage unit, the microgrid system can be adjusted through the electrochemical energy storage unit. Of course, in other embodiments, related equipment of other energy storage methods can also be introduced, which is not limited here.

[0050] Optionally, the drying and carbonizing mechanism 2 includes a drying device 21, which is used to heat and dry the material, and the material inlet and material outlet of the drying device 21 are located at the same end.

[0051] Optionally, in this embodiment, the drying device 21 includes an inner cylinder 211 and an outer cylinder 212 which are sleeved, and the inner cylinder 211 and the outer cylinder 212 are both arranged horizontally and rotate synchronously. The inner wall of the inner cylinder 211 has a first feed plate, and the inner wall of the outer cylinder 212 has a second feed plate. The first feed plate is arranged along a first spiral direction, and the second feed plate is arranged along a second spiral direction, and the first spiral direction is opposite to the second spiral direction. That is, when the inner cylinder 211 and the outer cylinder 212 rotate synchronously, since the spiral directions of the first feed plate and the second feed plate are opposite, the axial movement directions of the material in the inner cylinder 211 and the outer cylinder 212 are opposite. One end of the inner cylinder 211 is a feed inlet, and one end of the outer cylinder 212 protrudes axially from the other end of the inner cylinder 211, that is, after the material moves from one end of the inner cylinder 211 to the other end, it will fall into the outer cylinder 212, and then move in the outer cylinder 212 to the other end of the outer cylinder 212, that is, the discharge port.

[0052] The drying and carbonization mechanism 2 of the biomass energy storage and heating system adopts an inner and outer double-cylinder design, with the feed and discharge located on the same side, the inner cylinder 211 for feeding, and the outer cylinder 212 for discharging. The effective stroke is lengthened, and the running speed of the material in the inner and outer cylinders can be controlled by controlling the rotation speed of the inner and outer cylinders. The drying and carbonization mechanism 2 has the dual functions of drying and carbonization and low-temperature carbonization. The cylinder of the drying and carbonization mechanism 2 is heated by the steam waste heat output by the wind, solar and green electricity, the park heating mechanism 8, or the tail gas waste heat of the biomass combustion mechanism 6, and the cylinder operates within the temperature range of 60°C-300°C. For biomass fuels that are stored for a short time and used on site, the biomass raw material 900 passes quickly through the inner cylinder 211 and the outer cylinder 212, and is input into the forming and granulation mechanism 3 after drying and dehydration. In this process, the temperature is generally in the range of 60°C-150°C. In this case, the equipment only acts on drying and carbonization. For the situation that biomass fuel needs to be stored for a long time and transported across regions, after the biomass raw material 900 is dried and dehydrated in the inner cylinder 211, it enters the outer cylinder 212 for further heating. The inner and outer cylinders are operated at a low speed, and the residence time of the material in the inner and outer cylinders is increased. The quality of the biomass fuel is improved by extending the heating time, and then it enters the forming and granulating mechanism 3. The obtained biomass fuel is easy to store and transport, and at the same time, it can eliminate biological hazards such as insect eggs to product export or cross-regional transportation. In this process, the temperature is generally in the range of 150℃-300℃. The inner cylinder 211 of the equipment completes the drying and carbonization operation, and the outer cylinder 212 completes the low-temperature carbonization or baking operation.

[0053] Optionally, the drying and carbonizing mechanism 2 further comprises a gas collecting device 22, which is connected to one end of the outer cylinder 212. Optionally, the gas collecting device 22 is arranged at one end of the outer cylinder 212 away from the discharge port to collect the gas generated in the inner cylinder 211 and the outer cylinder 212.

[0054] Optionally, the drying device 21 further includes a driving assembly 214, which is used to drive the inner drum 211 and the outer drum 212 to rotate along their own axes. Optionally, the driving assembly 214 includes a driving member and a transmission assembly, and the transmission assembly is connected to the output end of the driving member. The transmission assembly drives the outer drum 212 to rotate, and the outer drum 212 is connected to the inner drum 211, so that the synchronous rotation of the two drums can be achieved. Optionally, the driving member is a conventional electric driving member, which can be selected according to the specifications of the drying device 21, and will not be described in detail here.

[0055] Optionally, the drying device 21 further includes a heating assembly 213, which is used to heat the outer cylinder 212 and the inner cylinder 211. The heating assembly 213 includes a plurality of heating pipelines, which are arranged outside the outer cylinder 212, some of which are connected to the tail gas pipeline of the biomass boiler, and some of which are connected to the steam output pipeline of the park heating mechanism 8. Optionally, according to the different temperatures of the tail gas and the steam, the medium pipeline with a lower temperature can be arranged away from the discharge port, and the medium pipeline with a higher temperature can be arranged close to the discharge port.

[0056] Optionally, the drying and carbonizing mechanism 2 further includes a feeding and discharging device 23, which is arranged at the end of the discharge port of the outer cylinder 212. Optionally, the feeding and discharging device 23 includes a feeding assembly connected to the feeding port of the inner cylinder 211, and the feeding and discharging device 23 also includes a discharging assembly connected to the discharge port of the outer cylinder 212. Optionally, the end of the inner cylinder 211 where the feeding port is arranged protrudes from the outer cylinder 212 so as to be connected to the feeding assembly of the feeding and discharging device 23. The specific structure of the feeding and discharging device 23 is a conventional device and will not be described in detail here.

[0057] It can be known that the crushing mechanism 1, the molding and granulation mechanism 3, the wind power generation mechanism 4, the photovoltaic power generation mechanism 5, the biomass combustion mechanism 6 and the steam power generation mechanism 7 in the system, the parts not introduced in this embodiment all adopt conventional designs and will not be described here.

[0058] The biomass energy storage and heating system takes the biomass crushing mechanism 1, drying and carbonizing mechanism 2, and forming and granulating mechanism 3 as the load end, and takes wind power, photovoltaic and other new energy as the source end. Based on the wind and solar power generation, it adopts the load-following source strategy and intelligent microgrid, and controls the start and stop and working time of the variable frequency motor of the load-end equipment in real time through the algorithm, so as to timely and fully absorb and store green electricity, realize the full absorption of new energy electricity and 900 pretreatment of biomass raw materials, convert the electricity of wind power and photovoltaic into chemical energy of biomass fuel, realize biomass energy storage, and create favorable conditions for the standardization, large-scale and industrial application of biomass.

[0059] This embodiment also provides an operating method, which is applied to the above-mentioned biomass energy storage and heating system. The operating method includes: the electric energy generated by the power generation and heating unit is configured according to the load-follow-source strategy, and on the basis of meeting the electricity consumption of the park, the start and stop and power of the equipment operation of the biomass energy storage unit are dynamically adjusted to store green electricity in a timely manner using biomass as a carrier.

[0060] The above-mentioned biomass energy storage and heating system applies this operation method, and can use biomass fuel preparation as the load, configure the system according to the load-follow-source strategy, and dynamically adjust the start and stop and operation status of the biomass crushing mechanism 1, the drying and carbonization mechanism 2, and the forming and granulation mechanism 3 to achieve the goal of timely consumption of green electricity. Moreover, the biomass energy storage and heating system adopts this operation method to completely consume wind and solar green electricity, and uses biomass fuel as a carrier to store green electricity in biomass fuel, so as to achieve the purpose of long-term, cross-regional stable energy storage, and couple with the heating or power generation system to provide green and low-carbon heating and electricity. The system has a simple structure, few equipment, and low energy consumption. In addition, the biomass energy storage and heating system adopts the above-mentioned operation method to pre-treat the biomass raw material 900, realize the standardization and industrialization of biomass fuel products, create conditions for large-scale storage, transportation and utilization, and can meet the back-end needs at a low cost. The biomass fuel obtained by the system can be used as fuel for the biomass combustion mechanism 6, or it can be stored or transported as a standardized product to industrial application scenarios at a longer distance, such as for low-carbon transformation of thermal power plants by blending biomass, or for biomass gasification to prepare liquid fuels such as green methanol, or for low-carbon transformation of industries such as metallurgy and building materials.

[0061] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Biomass energy storage heating system, characterized in that: include: The biomass energy storage unit comprises a crushing mechanism (1), a drying and carbonizing mechanism (2) and a molding and granulating mechanism (3); the biomass raw material (900) passes through the crushing mechanism (1), the drying and carbonizing mechanism (2) and the molding and granulating mechanism (3) to become a biomass fuel; The power generation and heating unit comprises a wind power generation mechanism (4) and a photovoltaic power generation mechanism (5); the electric energy generated by the power generation and heating unit is used for park electricity consumption and equipment operation of the biomass energy storage unit.

2. The biomass energy storage heating system according to claim 1, characterized in that: The power generation and heating unit also includes a biomass combustion mechanism (6) and a steam power generation mechanism (7). The raw material of the biomass combustion mechanism (6) is the biomass fuel. The steam heated by the biomass combustion mechanism (6) is input into the steam power generation mechanism (7). The electric energy generated by the steam power generation mechanism (7) is used for electricity consumption in the park.

3. The biomass energy storage heating system according to claim 2 is characterized in that: The power generation and heat supply unit further comprises a park heating mechanism (8), and the steam heated by the biomass combustion mechanism (6) is input into the park heating mechanism (8).

4. The biomass energy storage heating system according to claim 3 is characterized in that: The steam output by the park heating mechanism (8) is used to heat the material in the drying and carbonizing mechanism (2).

5. The biomass energy storage heating system according to claim 2, characterized in that: The tail gas of the biomass combustion mechanism (6) is used to heat the material in the drying and carbonization mechanism (2).

6. The biomass energy storage heating system according to claim 1, characterized in that: It also includes an electrochemical energy storage unit, in which part of the electric energy generated by the power generation and heat supply unit is stored.

7. The biomass energy storage heating system according to claim 1, characterized in that: The drying and carbonizing mechanism (2) comprises a drying device (21), the drying device (21) is used to heat and dry materials, and the material inlet and material outlet of the drying device (21) are located at the same end.

8. The biomass energy storage heating system according to claim 7, characterized in that: The drying device (21) comprises an inner cylinder (211) and an outer cylinder (212) which are sleeved together. The inner cylinder (211) and the outer cylinder (212) are both arranged horizontally and rotate synchronously. The inner wall of the inner cylinder (211) has a first feed plate, and the inner wall of the outer cylinder (212) has a second feed plate. The first feed plate is arranged along a first spiral direction, and the second feed plate is arranged along a second spiral direction. The first spiral direction is opposite to the second spiral direction. One end of the inner cylinder (211) is the feed inlet, and one end of the outer cylinder (212) protrudes axially from the other end of the inner cylinder (211). The other end of the outer cylinder (212) is the feed outlet.

9. The biomass energy storage heating system according to claim 8, characterized in that: The drying and carbonizing mechanism (2) further comprises a gas collecting device (22), wherein the gas collecting device (22) is connected to one end of the outer cylinder (212).

10. An operating method, characterized in that: Applied to the biomass energy storage heating system according to any one of claims 1 to 9, the operating method comprises: The electric energy generated by the power generation and heating unit is configured according to the load-follow-source strategy. On the basis of meeting the electricity demand of the park, the start and stop of the equipment operation and the power of the biomass energy storage unit are dynamically adjusted to store green electricity in a timely manner using biomass as a carrier.

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