Low-carbon energy system and method coupled with solid waste utilization of coal-fired power plant

Abstract

The invention discloses a low-carbon energy system and method for coupling solid waste utilization of a coal-fired power plant. The system comprises a photovoltaic generator set, a wind generating set, an electric arc furnace, a biomass crusher, a biomass particle storage device, a coal-fired boiler system and the like. The method comprises the following steps of: providing electric energy for the electric arc furnace by utilizing redundant generating capacity of a photovoltaic generating set and a wind generating set; the fiber material prepared in the electric arc furnace, coal gangue and pulverized coal ash collected in the flue gas dust remover are jointly used as raw materials of the soil-like ecological restoration material, and preparation is performed in a soil-like preparation machine; energy plants which are resistant to drought and high in water and soil conservation capacity are planted under the photovoltaic generator set; the energy plants enter a biomass particle storage device to be stored after being subjected to the procedures of crushing, shaping and the like; the biomass particles are subjected to blending combustion in a coal-fired boiler system; flue gas generated after combustion of the coal-fired boiler system collects pulverized coal ash in a flue gas dust remover. The utilization rate of the coal-based solid waste is increased, and the application field of the coal-based solid waste is expanded.

Description

Technical Field

[0001] The present invention belongs to the technical field of low-carbon energy, and in particular relates to a low-carbon energy system and method coupled with solid waste utilization of coal-fired power plants. Background Art

[0002] The storage and landfill of coal-based solid wastes occupy a large amount of land resources, posing a great threat to the environment and safety. At present, the common treatment methods for coal-based solid wastes are landfilling and manufacturing primary building materials. Not only is the utilization rate low, but it also cannot generate high added value and cannot achieve the goal of "turning waste into treasure".

[0003] Coal-based solid waste contains rich minerals and metal elements, so it has rich utilization value. For example, the fly ash commonly used in the thermal power generation industry is a typical coal-based solid waste, but there is currently a lack of effective means of utilization, and most of it is treated by landfill. Coal-based solid waste is rich in elements such as Ca, Fe, K and Mg, which can provide necessary nutrients for plant growth; in addition, due to its special physical and chemical properties, fly ash also has a strong water retention capacity, which is conducive to plant growth. The large slag produced after the combustion of coal-fired boilers can be used to prepare fiber materials. It not only has high-quality water retention capacity, but also uses high temperature during the preparation process to volatilize the heavy metals inside it. It is a high-quality green ecological restoration material. At present, the stock of coal-based solid waste is increasing year by year. If it is not treated in a green and clean way, it will cause certain damage to the ecological environment.

[0004] The ecological environment of coal-fired power bases in northern my country is usually fragile, with serious land desertification, but with good sunshine and wind conditions, so more photovoltaic and wind turbines have been built. The ecological situation in these coal base areas is complex, and soil erosion is serious. With the advancement of energy mining, the already fragile ecological environment has suffered greater damage, and this phenomenon needs to be improved urgently. If coal-based solid waste is landfilled as waste, it will aggravate the damage to the ecological environment, but if green ecological restoration materials are prepared, the ecological environment near the coal-fired power base can be restored. Soil-like materials prepared using green ecological restoration materials, coal fly ash and coal gangue can be used to plant energy plants such as red willow and saxaul on arid land. They are not only drought-resistant but also can maintain water and soil; photovoltaic panels can block sunlight for energy plants, avoid long-term direct sunlight, and increase their survival rate. After the energy plants grow and mature, they can be collected as biomass fuels for mixing and burning in power plant boilers, which can not only save coal consumption in coal-fired power plants, but also reduce carbon emissions, so that new energy power generation and coal-fired power generation are organically combined, reducing carbon emissions in the entire energy system. In order to further alleviate the widespread problems of soil erosion and land desertification in the northern coal-fired power base, ecological restoration is imminent. Summary of the invention

[0005] The present invention provides a low-carbon energy system and method coupled with solid waste utilization of coal-fired power plants, which combines coal-fired power plants, new energy power generation, coal-based solid waste utilization and ecological restoration. It not only improves the utilization rate of coal-based solid waste and expands its application field, but also constructs a multi-coupled energy system and reduces the carbon emissions of the system.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: A low-carbon energy system coupled with solid waste utilization of coal-fired power plants, including a photovoltaic generator set, a wind generator set, an arc furnace, a soil preparation machine, an energy plant, a biomass crusher, a biomass pellet storage device and a coal-fired boiler system; Photovoltaic generator sets and wind turbine generator sets are used to generate electricity, one part of which is connected to the power grid and the other part is used to power the electric arc furnace. The slag outlet of the coal-fired boiler system is connected to the electric arc furnace, and the outlet of the electric arc furnace is connected to the soil preparation machine. Energy plants are planted under the photovoltaic generator set, and the biomass crusher is provided with an energy plant entrance, and the outlet of the biomass crusher is connected to the coal-fired boiler system.

[0007] A further improvement of the present invention is that it also includes a flue gas dust collector and an induced draft fan, and the flue gas outlet of the coal-fired boiler system is connected to the induced draft fan through the flue gas dust collector.

[0008] A further improvement of the present invention is that it also includes a chimney, and the outlet of the induced draft fan is connected to the chimney.

[0009] A further improvement of the present invention is that part of the large slag produced after combustion in the coal-fired boiler system enters the electric arc furnace to prepare fiber materials, and the other part and the coal ash collected in the flue gas dust collector are used as raw materials for building materials.

[0010] A further improvement of the present invention is that the redundant power generation of the photovoltaic generator set and the wind generator set is used to provide electric energy for the electric arc furnace.

[0011] A further improvement of the present invention is that the soil-like preparation machine is used to prepare soil-like ecological restoration materials.

[0012] A further improvement of the present invention is that the energy plants are planted under the photovoltaic power generation group, and the photovoltaic power generation group is used to provide shielding for the energy plants.

[0013] A further improvement of the present invention is that the mature energy plants are introduced into a biomass crusher for crushing and shaping to be prepared into biomass pellets, which are then stored in a biomass pellet storage.

[0014] A further improvement of the present invention is that the flue gas generated after combustion in the coal-fired boiler system can be collected in a flue gas dust collector to obtain coal pulverized ash.

[0015] A low-carbon energy method coupled with solid waste utilization of coal-fired power plants, the method is based on the low-carbon energy system coupled with solid waste utilization of coal-fired power plants, comprising: The redundant power generation of photovoltaic generators and wind turbines is used to provide electric energy for the electric arc furnace. Part of the large slag produced by the coal-fired boiler system is used to prepare fiber materials, and the other part is used together with the coal fly ash collected in the flue gas dust collector as raw materials for building materials. The fiber material prepared in the electric arc furnace is used together with the coal gangue and coal fly ash collected in the flue gas dust collector as the raw materials of the soil-like ecological restoration material, and is prepared in the soil-like preparation machine; Using the prepared soil-like ecological restoration materials, energy plants with strong drought resistance and soil and water conservation capabilities are planted under photovoltaic power generation units; After the mature energy plants are crushed and shaped in the biomass crusher, they are stored in the biomass pellet storage tank. The biomass pellets stored in the biomass pellet storage are mixed and burned in the coal-fired boiler system; The flue gas generated after combustion in the coal-fired boiler system collects coal pulverized ash in the flue gas dust collector.

[0016] Compared with the prior art, the present invention has at least the following beneficial technical effects: The present invention provides a low-carbon energy system and method coupled with solid waste utilization of coal-fired power plants, which utilizes the redundant power generation of photovoltaic generator sets and wind generator sets to power an electric arc furnace, thereby greatly reducing the energy consumption in preparing fiber materials; and the large slag produced by the coal-fired boiler system has a certain amount of waste heat, which can be utilized, thereby further reducing energy consumption.

[0017] Furthermore, the waste gas generated by preparing fiber materials using an electric arc furnace is passed into a coal-fired boiler system for combustion, which can not only utilize the waste heat and combustible materials in the waste gas, but also harmlessly treat the waste gas, making the fiber preparation process green and energy-saving. Fiber materials, coal fly ash and coal gangue are used as raw materials for preparing soil-like ecological restoration materials, wherein the mass proportion of coal fly ash is not less than 40%, and the mass proportion of coal gangue is not more than 30%, and the specific proportion can be dynamically adjusted according to the characteristics of planting energy plants. Using soil-like ecological restoration materials to plant energy plants under photovoltaic power generation units, the photovoltaic power generation unit can be used to shield the energy plants from direct sunlight for a long time, thereby improving their survival rate; and energy plants are selected from red willow or Haloxylon ammodendron, which have the characteristics of drought resistance, strong soil and water conservation ability and high calorific value. After the mature energy plants are crushed and shaped, biomass pellets are prepared, the biomass pellets are stored, and mixed and burned in a coal-fired boiler system, which can reduce the coal consumption and carbon emissions of the unit.

[0018] In summary, the present invention couples systems such as new energy power generation, coal-fired power generation, coal-based solid waste utilization, ecological restoration and biomass co-combustion, which can not only prepare diversified products such as green ecological materials, building materials and electric energy, realize chemical polygeneration, but also obtain an energy comprehensive utilization system with high energy utilization rate and reduced carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a system schematic diagram of the present invention.

[0021] Description of reference numerals: 1- Photovoltaic generator set, 2- Wind generator set, 3- Electric arc furnace, 4- Type soil preparation machine, 5- Energy plant, 6- Biomass crusher, 7- Biomass pellet storage, 8- Coal-fired boiler system, 9- Flue gas dust collector, 10- induced draft fan, 11- Chimney. DETAILED DESCRIPTION

[0022] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0028] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0029] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0030] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0031] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Example 1 refer to Figure 1 The present invention provides a low-carbon energy system coupled with solid waste utilization of coal-fired power plants, comprising a photovoltaic generator set 1, a wind generator set 2, an electric arc furnace 3, a soil-like preparation machine 4, an energy plant 5, a biomass crusher 6, a biomass pellet storage device 7 and a coal-fired boiler system 8; the photovoltaic generator set 1 and the wind generator set 2 are used for generating electricity, one part of which is connected to the power grid, and the other part is used to power the electric arc furnace 3, the large slag outlet of the coal-fired boiler system 8 is connected to the electric arc furnace 3, and the outlet of the electric arc furnace 3 is connected to the soil-like preparation machine 4, energy plants 5 are planted below the photovoltaic generator set 1, the biomass crusher 6 is provided with an energy plant inlet, and the outlet of the biomass crusher 6 is connected to the coal-fired boiler system 8.

[0033] In this embodiment, a chimney 11 is further included, and an outlet of the induced draft fan 10 is connected to the chimney 11 .

[0034] Example 2 refer to Figure 1 The present invention provides a low-carbon energy system coupled with solid waste utilization of coal-fired power plants, including a photovoltaic power generation unit 1, a wind power generation unit 2, an electric arc furnace 3, a soil preparation machine 4, an energy plant 5, a biomass crusher 6, a biomass pellet storage device 7, a coal-fired boiler system 8, a flue gas dust collector 9, an induced draft fan 10 and a chimney 11.

[0035] The photovoltaic generator set 1 and the wind generator set 2 are connected to the grid when the load required by the power grid is large, and when the load of the power grid is sufficient, the electric arc furnace 3 is powered; the large slag produced by the coal-fired boiler system 8 after combustion is led out from the bottom of the furnace bypass and passed into the electric arc furnace 3, and the excess large slag is used to prepare building materials. The fiber material prepared by the electric arc furnace 3 is used together with coal fly ash and coal gangue as raw materials to prepare soil-like ecological restoration materials in the soil-like preparation machine 4. The energy plant 5 is planted under the photovoltaic generator set 1, and the photovoltaic generator set 1 is used to provide it with a shield to avoid direct sunlight all day long. The mature energy plant 5 is passed into the biomass crusher 6 for crushing and shaping processes, and then prepared into biomass pellets, which are then stored in the biomass pellet storage 7. The pellets in the biomass pellet storage 7 are passed into the coal-fired boiler system 8 for mixed combustion, reducing the carbon emissions and coal consumption of the coal-fired generator set. The flue gas generated after combustion in the coal-fired boiler system 8 can be collected in the flue gas dust collector 9 to obtain coal ash, and the treated flue gas is discharged through the induced draft fan 10 and the chimney 11.

[0036] Example 3 refer to Figure 1 The present invention provides a low-carbon energy method coupled with solid waste utilization of coal-fired power plants, and the operating steps are as follows: 1) The redundant power generation of the photovoltaic generator set 1 and the wind turbine generator set 2 is used to provide electric energy for the electric arc furnace 3; a part of the large slag produced after the combustion of the coal-fired boiler system 8 enters the electric arc furnace 3 to prepare fiber materials, and the other part and the coal ash collected in the flue gas dust collector 9 are used as raw materials for building materials.

[0037] 2) The fiber material prepared in the electric arc furnace 3 is used together with the coal gangue and the coal fly ash collected in the flue gas dust collector 9 as raw materials for the soil-like ecological restoration material, and is prepared in the soil-like preparation machine 4 .

[0038] 3) Using the prepared soil-like ecological restoration material, energy plants 5 with strong drought resistance and soil and water conservation capabilities are planted under the photovoltaic power generation unit 1.

[0039] 4) After the energy plants 5 grow to maturity, they are crushed and shaped in the biomass crusher 6 and then stored in the biomass pellet storage 7.

[0040] 5) The biomass pellets stored in the biomass pellet storage 7 are mixed and burned in the coal-fired boiler system 8 .

[0041] 6) Flue gas generated after combustion in the coal-fired boiler system 8 collects coal pulverized ash in the flue gas dust collector 9 and is then discharged through the induced draft fan 10 and the chimney 11.

[0042] The present invention uses the redundant power of the photovoltaic power generation group 1 and the wind power generation group 2 to provide electric energy for the electric arc furnace 3, realizes the efficient use of renewable energy (solar energy and wind energy), and reduces the dependence on traditional energy. When the light or wind power is insufficient, the coal-fired boiler system 8 can be used as a backup energy source to ensure the stable operation of the system. Part of the large slag produced by the coal-fired boiler system 8 is used to prepare fiber materials in the electric arc furnace 3, and the other part is used together with the coal fly ash collected by the flue gas dust collector 9 as a raw material for building materials, realizing the recycling of industrial waste. The fiber material prepared by the electric arc furnace 3 is used together with wastes such as coal gangue and coal fly ash to prepare soil-like ecological restoration materials, further broadening the application path of waste. Planting energy plants 5 with strong drought resistance and soil and water conservation capabilities under the photovoltaic power generation group 1 not only utilizes land resources, but also improves the comprehensive benefits of the photovoltaic power station. After being crushed and shaped by the biomass crusher 6, the energy plant 5 becomes a biomass granular material, providing a clean and efficient alternative fuel for the coal-fired boiler system 8.

[0043] The key points of the present invention are as follows: The present invention utilizes the redundant power generation of photovoltaic generator sets and wind generator sets to power the electric arc furnace, which can greatly reduce the energy consumption of preparing fiber materials; and the large slag produced by the coal-fired boiler system has a certain amount of waste heat, which can be utilized, so that energy consumption is further reduced.

[0044] The present invention utilizes the waste gas generated by preparing fiber materials in an electric arc furnace and introduces it into a coal-fired boiler system for combustion, which can not only utilize the waste heat and combustible substances in the waste gas, but also harmlessly treat the waste gas, making the fiber preparation process green and energy-saving.

[0045] The present invention uses fiber materials, coal fly ash and coal gangue as raw materials for preparing soil-like ecological restoration materials, wherein the mass proportion of coal fly ash is not less than 40%, and the mass proportion of coal gangue is not more than 30%, and the specific proportions can be dynamically adjusted according to the characteristics of the planted energy plants.

[0046] The present invention utilizes soil-like ecological restoration materials to plant energy plants under photovoltaic power generation units, and can utilize the shielding of photovoltaic power generation units to prevent long-term direct sunlight from shining on energy plants, thereby improving their survival rate; and energy plants are selected from plants such as red willow or Haloxylon ammodendron that are drought-resistant, have strong soil and water conservation capabilities, and have high calorific value.

[0047] The present invention prepares biomass pellets after crushing and shaping mature energy plants, stores the biomass pellets, and mixes them in a coal-fired boiler system, thereby reducing the coal consumption and carbon emissions of the unit.

[0048] The present invention couples systems such as new energy power generation, coal-fired power generation, coal-based solid waste utilization, ecological restoration and biomass co-combustion, which can not only prepare diversified products such as green ecological materials, building materials and electric energy, realize chemical polygeneration, but also obtain an energy comprehensive utilization system with high energy utilization rate and reduced carbon emissions.

[0049] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0050] In addition, it should be understood that although this specification is described in accordance with the implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution according to the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A low-carbon energy system coupled with solid waste utilization of coal-fired power plants, characterized in that: It includes a photovoltaic generator set (1), a wind generator set (2), an electric arc furnace (3), a soil preparation machine (4), an energy plant (5), a biomass crusher (6), a biomass pellet storage device (7) and a coal-fired boiler system (8); The photovoltaic generator set (1) and the wind turbine generator set (2) are used to generate electricity, one part of which is connected to the power grid and the other part is used to supply power to the electric arc furnace (3). The slag outlet of the coal-fired boiler system (8) is connected to the electric arc furnace (3), and the outlet of the electric arc furnace (3) is connected to the soil preparation machine (4). Energy plants (5) are planted below the photovoltaic generator set (1), and the biomass crusher (6) is provided with an energy plant inlet. The outlet of the biomass crusher (6) is connected to the coal-fired boiler system (8).

2. A low-carbon energy system coupled with solid waste utilization of coal-fired power plants according to claim 1, characterized in that: It also includes a flue gas dust collector (9) and an induced draft fan (10), and the flue gas outlet of the coal-fired boiler system (8) is connected to the induced draft fan (10) through the flue gas dust collector (9).

3. A low-carbon energy system coupled with solid waste utilization of coal-fired power plants according to claim 2, characterized in that: It also includes a chimney (11), and an outlet of the induced draft fan (10) is connected to the chimney (11).

4. A low-carbon energy system coupled with solid waste utilization of coal-fired power plants according to claim 2, characterized in that: A portion of the large slag produced after combustion in the coal-fired boiler system (8) enters the electric arc furnace (3) to prepare fiber materials, and the other portion and the coal ash collected in the flue gas dust collector (9) are used as raw materials for building materials.

5. A low-carbon energy system coupled with solid waste utilization of coal-fired power plants according to claim 2, characterized in that: The redundant power generated by the photovoltaic generator set (1) and the wind turbine generator set (2) is used to provide electric energy for the electric arc furnace (3).

6. A low-carbon energy system coupled with solid waste utilization of coal-fired power plants according to claim 2, characterized in that: The soil-like preparation machine (4) is used to prepare soil-like ecological restoration materials.

7. A low-carbon energy system coupled with solid waste utilization of coal-fired power plants according to claim 2, characterized in that: The energy plant (5) is planted under the photovoltaic power generation group (1), and the photovoltaic power generation group (1) provides shade for the energy plant (5).

8. A low-carbon energy system coupled with solid waste utilization of coal-fired power plants according to claim 7, characterized in that: The mature energy plants (5) are introduced into a biomass crusher (6) for crushing and shaping to be prepared into biomass pellets, which are then stored in a biomass pellet storage container (7).

9. A low-carbon energy system coupled with solid waste utilization of coal-fired power plants according to claim 2, characterized in that: Flue gas generated after combustion in a coal-fired boiler system (8) can be collected in a flue gas dust collector (9) to obtain coal pulverized ash.

10. A low-carbon energy method coupled with solid waste utilization of coal-fired power plants, characterized in that: The method is based on a low-carbon energy system coupled with solid waste utilization of coal-fired power plants as described in any one of claims 2 to 9, comprising: The redundant power generation of the photovoltaic power generation group (1) and the wind power generation group (2) is used to provide electric energy for the electric arc furnace (3); a part of the large slag generated after the combustion of the coal-fired boiler system (8) enters the electric arc furnace (3) to prepare fiber materials, and the other part and the coal ash collected in the flue gas dust collector (9) are used as raw materials for building materials; The fiber material prepared in the electric arc furnace (3) is used together with the coal gangue and coal fly ash collected in the flue gas dust collector (9) as raw materials for the soil-like ecological restoration material, and is prepared in the soil-like preparation machine (4); Using the prepared soil-like ecological restoration material, energy plants (5) with strong drought resistance and soil and water conservation capabilities are planted under the photovoltaic power generation unit (1); After the energy plants (5) have grown to maturity, they are crushed and shaped in a biomass crusher (6) and then stored in a biomass pellet storage device (7); The biomass pellets stored in the biomass pellet storage (7) are mixed and burned in the coal-fired boiler system (8); Flue gas generated after combustion in a coal-fired boiler system (8) collects coal pulverized ash in a flue gas dust collector (9).

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