An ecological restoration structure and ecological restoration method for ash storage yard of coal-fired power plant

Abstract

The present invention provides an ecological restoration structure and ecological restoration method for ash storage yards of coal-fired power plants, wherein the ecological restoration structure for ash storage yards of coal-fired power plants comprises: an organic soil layer; a plurality of water-absorbing fixed columns in contact with the lower surface of the organic soil layer; a slope-fixing material layer covering the upper surface of the organic soil layer; and a vegetation layer rooted in the organic soil layer and penetrating the slope-fixing material layer. Compared with the prior art, the outermost layer of the ecological restoration structure provided by the present invention is a vegetation layer, and the greening covers the ash storage yard. At the same time, combined with the arrangement of the water-absorbing fixed columns and the slope-fixing material layer, it can prevent wind and fix the slope, and can also draw the stored water under the fly ash pile, so that no maintenance and irrigation are required, and the dust problem of the ash storage yard can be permanently solved, while the fly ash can be comprehensively utilized.

Description

Technical Field

[0001] The present invention relates to the technical field of ecological restoration, and more specifically, to an ecological restoration structure and an ecological restoration method for an ash storage yard of a coal-fired power plant. Background Art

[0002] For a long time, my country's power industry has adopted the "ash field storage" mode for coal ash, and in recent years it has gradually changed to the "storage and use coexistence" mode. Although the annual ash utilization rate has been steadily increasing, the annual ash discharge has also been growing rapidly. Therefore, a large amount of coal ash is still discharged to the ash field every year, which not only occupies a large amount of land, but also the fly ash is lighter than sand. When there is a strong wind, it is very easy to raise dust, resulting in secondary dust pollution, forming a large-scale open dust source, affecting the surrounding ecological environment, and causing losses to the lives and property of surrounding residents. Today, when the call for environmental protection is rising, the problem of fly ash pollution seriously restricts the growth and development of enterprises.

[0003] At present, the main methods to solve the dust pollution in the ash storage yard of coal-fired power plants are desulfurized gypsum layered dust prevention method, spraying method and ash field planting method; however, the methods in the prior art have the problems of serious waste of resources and poor control effect. For example, using desulfurized gypsum for layered dust prevention will greatly change the properties of fly ash, which will hinder the comprehensive utilization of subsequent fly ash, and desulfurized gypsum is very likely to cause the spread of harmful metal pollution in fly ash, thereby causing serious environmental pollution. In addition, fly ash is very close to fine sand, and its water retention performance is poor. The surface water is easy to evaporate and infiltrate, so the spraying method cannot solve the dust problem of ash storage yard once and for all. The key to ensuring the survival rate of dust-proof forests in the ash field planting method is water source, especially the recovery period when the plants are just planted and the growth period of the year cannot be separated from the nourishment of water, which requires continuous investment of manpower and material resources; and the current fly ash stacking method is prone to landslide risks due to the overly simple and weak slope treatment. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide an ecological restoration structure and an ecological restoration method for an ash storage yard of a coal-fired power plant. The ecological restoration structure provided by the present invention can prevent wind and consolidate slopes, and does not require maintenance or irrigation, and can permanently solve the dust problem in the ash storage yard.

[0005] The present invention provides an ecological restoration structure for an ash storage yard of a coal-fired power plant, comprising:

[0006] organic soil layer;

[0007] a number of water-absorbing fixed columns in contact with the lower surface of the organic soil layer;

[0008] A layer of slope stabilization material covering the upper surface of the organic soil layer;

[0009] A vegetation layer that is rooted in the organic soil layer and penetrates the slope-stabilizing material layer.

[0010] Preferably, the organic soil layer consists of humus soil;

[0011] The thickness of the organic soil layer is 5 cm to 20 cm.

[0012] Preferably, the water absorbing fixed column comprises:

[0013] Porous fixed column;

[0014] A spherical water-absorbing material disposed inside the porous fixed column;

[0015] The length of the water absorbing fixed column is ≥50 cm, and the diameter is 20 cm to 30 cm.

[0016] Preferably, the spherical water-absorbing material is prepared from fly ash, cement, super absorbent resin and aqueous solution in a mass ratio of (90-120): (18-32): (8-12): (40-65); the aqueous solution is prepared from aluminum sulfate, ferrous sulfate and water in a mass ratio of (1-5): (2-7): 200;

[0017] The diameter of the spherical water-absorbing material is 10 mm to 15 mm.

[0018] Preferably, the preparation method of the spherical water-absorbing material is specifically as follows:

[0019] The fly ash, cement, super absorbent resin and aqueous solution are granulated on a spherical plate, and then cured at 20°C to 30°C for 20h to 30h to obtain a spherical absorbent material.

[0020] Preferably, the slope-fixing material layer is composed of irregular water-absorbing composite materials;

[0021] The thickness of the slope-fixing material layer is 25 cm to 35 cm.

[0022] Preferably, the irregular water-absorbing composite material comprises:

[0023] Spherical water-absorbing material;

[0024] A dry base of a mixture wrapping the spherical water-absorbing material;

[0025] The size of the irregular water-absorbing composite material is 25 mm to 30 mm.

[0026] Preferably, the preparation method of the irregular water-absorbing composite material is specifically as follows:

[0027] Cement, attapulgite clay, super absorbent resin, sulfur powder, humic acid, urea and dry cattle and sheep dung are mixed uniformly in a mass ratio of (10-20): (20-30): (15-30): (8-13): (20-35): (15-25): (40-50) to obtain a dry mixture; a spherical absorbent material is placed in a ball-forming plate, the dry mixture is added and an aqueous solution is sprayed, and the dry mixture is wrapped on the spherical absorbent material under continuous rotation of a granulator to obtain an irregular absorbent composite material;

[0028] The aqueous solution is prepared from aluminum sulfate, ferrous sulfate and water in a mass ratio of (1-5):(2-7):200.

[0029] Preferably, the vegetation in the vegetation layer includes one or more of Caragana microphylla, Hippophae rhamnoides, Astragalus adoxaceae, Medicago sativa, Amorpha fruticosa, Fescue australis, Lolium perenne, Vetiver, White Clover and Cynodon dactylon.

[0030] The present invention also provides an ecological restoration method for an ash storage yard of a coal-fired power plant, which uses the ecological restoration structure for an ash storage yard of a coal-fired power plant described in the above technical solution to fix the slope formed by the fly ash pile to be processed.

[0031] The present invention provides an ecological restoration structure and ecological restoration method for ash storage yards of coal-fired power plants, wherein the ecological restoration structure for ash storage yards of coal-fired power plants comprises: an organic soil layer; a plurality of water-absorbing fixed columns in contact with the lower surface of the organic soil layer; a slope-fixing material layer covering the upper surface of the organic soil layer; and a vegetation layer rooted in the organic soil layer and penetrating the slope-fixing material layer. Compared with the prior art, the outermost layer of the ecological restoration structure provided by the present invention is a vegetation layer, and the greening covers the ash storage yard. At the same time, combined with the arrangement of the water-absorbing fixed columns and the slope-fixing material layer, it can prevent wind and fix the slope, and can also draw the stored water under the fly ash pile, so that no maintenance and irrigation are required, and the dust problem of the ash storage yard can be permanently solved, while the fly ash can be comprehensively utilized.

[0032] In addition, the present invention can plant plants with high economic benefits such as forage grass in the vegetation layer, and the forage grass can be harvested every year, which not only achieves the purpose of greening, but also can provide feed for the farm, forming a virtuous circle. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of an ecological restoration structure for an ash storage yard of a coal-fired power plant provided in an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of an ecological restoration structure for an ash storage yard of a coal-fired power plant provided in Example 1 of the present invention. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The present invention provides an ecological restoration structure for an ash storage yard of a coal-fired power plant, comprising:

[0037] organic soil layer;

[0038] a number of water-absorbing fixed columns in contact with the lower surface of the organic soil layer;

[0039] A layer of slope stabilization material covering the upper surface of the organic soil layer;

[0040] A vegetation layer that is rooted in the organic soil layer and penetrates the slope-stabilizing material layer.

[0041] See also Figure 1 , Figure 1 A schematic diagram of an ecological restoration structure for an ash storage yard of a coal-fired power plant provided in an embodiment of the present invention; wherein 1 is an organic soil layer, 2 is a water-absorbing fixed column, 3 is a slope-fixing material layer, 4 is a vegetation layer, a represents a fly ash pile, and b represents the top surface.

[0042] In the present invention, the organic soil layer is preferably composed of humus soil, which can be formed by laying on the slope formed by the fly ash pile, thereby covering the fly ash pile. In the present invention, the thickness of the organic soil layer is preferably 5 cm to 20 cm, more preferably 10 cm.

[0043] In the present invention, a plurality of water-absorbing fixed columns are in contact with the lower surface of the organic soil layer, and can be fixed by extending the water-absorbing fixed columns into the organic soil layer. In the present invention, the plurality of water-absorbing fixed columns are evenly distributed on the lower surface of the organic soil layer, and the interval between two connected water-absorbing fixed columns is preferably 50 cm to 150 cm, and more preferably 70 cm.

[0044] In the present invention, the water absorbing fixed column preferably comprises:

[0045] Porous fixed column;

[0046] The spherical water-absorbing material is arranged inside the porous fixing column.

[0047] In the present invention, the porous fixing column is preferably made of polyvinyl chloride and is a hollow tubular structure with a plurality of holes evenly distributed on the tube wall; the hole diameter is preferably less than 10 mm.

[0048] In the present invention, the spherical water-absorbing material is arranged inside the porous fixing column; the diameter of the spherical water-absorbing material is preferably 10 mm to 15 mm, so that it will not leak out from the holes of the porous fixing column and can absorb water through the holes.

[0049] In the present invention, the spherical water-absorbing material is preferably prepared from fly ash, cement, super absorbent resin and aqueous solution in a mass ratio of (90-120): (18-32): (8-12): (40-65), and more preferably prepared from fly ash, cement, super absorbent resin and aqueous solution in a mass ratio of 100:20:10:43. The present invention has no special restrictions on the sources of the fly ash, cement, super absorbent resin and aqueous solution; wherein the fly ash can utilize the fly ash in the fly ash pile to be processed to achieve comprehensive utilization of fly ash; the super absorbent resin is preferably a commercially available agricultural water-absorbing resin, and the water absorption rate of the super absorbent resin is preferably 200 to 500 times its own weight; the aqueous solution is preferably prepared from aluminum sulfate, ferrous sulfate and water in a mass ratio of (1-5): (2-7): 200, and more preferably prepared from aluminum sulfate, ferrous sulfate and water in a mass ratio of 2:3:200.

[0050] In the present invention, the preparation method of the spherical water-absorbing material is preferably as follows:

[0051] The fly ash, cement, super absorbent resin and aqueous solution are granulated on a spherical plate, and then cured at 20°C to 30°C for 20h to 30h to obtain a spherical absorbent material;

[0052] More preferably:

[0053] The fly ash, cement, super absorbent resin and aqueous solution are granulated on a spherical plate, and then cured at 25° C. for 24 hours to obtain a spherical absorbent material.

[0054] After the spherical water-absorbing material is prepared, it is loaded into a porous fixed column to fill it up to obtain a water-absorbing fixed column. In the present invention, the length of the water-absorbing fixed column is preferably ≥50 cm, which is beneficial for absorbing moisture from the deep layer of the fly ash pile on the one hand, and for fixing the slope on the other hand; the diameter of the water-absorbing fixed column is preferably 20 cm to 30 cm.

[0055] In the present invention, the slope-fixing material layer covers the upper surface of the organic soil layer. In the present invention, the slope-fixing material layer is preferably composed of an irregular water-absorbing composite material, which can be formed by laying on the upper surface of the organic soil layer, thereby covering the organic soil layer. In the present invention, the thickness of the slope-fixing material layer is preferably 25 cm to 35 cm, more preferably 30 cm.

[0056] In the present invention, the irregular water-absorbing composite material preferably comprises:

[0057] Spherical water-absorbing material;

[0058] The mixture is dry basis wrapping the spherical water-absorbing material.

[0059] In the present invention, the spherical water-absorbing material is the same as that described in the above technical solution, and will not be described in detail here.

[0060] In the present invention, the mixture dry base wraps the spherical water-absorbing material. In the present invention, the mixture dry base is preferably prepared from cement, attapulgite clay, super absorbent resin, sulfur powder, humic acid, urea and dry cattle and sheep manure. The present invention has no special restrictions on the sources of the cement, attapulgite clay, super absorbent resin, sulfur powder, humic acid, urea and dry cattle and sheep manure; wherein the super absorbent resin is the same as that described in the above technical solution, and will not be repeated here.

[0061] In the present invention, the method for preparing the irregular water-absorbing composite material is preferably as follows:

[0062] Cement, attapulgite clay, super absorbent resin, sulfur powder, humic acid, urea and dry cattle and sheep dung are mixed uniformly in a mass ratio of (10-20): (20-30): (15-30): (8-13): (20-35): (15-25): (40-50) to obtain a dry mixture; a spherical absorbent material is placed in a ball-forming plate, the dry mixture is added and an aqueous solution is sprayed, and the dry mixture is wrapped on the spherical absorbent material under continuous rotation of a granulator to obtain an irregular absorbent composite material;

[0063] More preferably:

[0064] Cement, attapulgite clay, super absorbent resin, sulfur powder, humic acid, urea and dry cattle and sheep dung are uniformly mixed in a mass ratio of 15:25:20:10:25:20:45 to obtain a dry mixture; a spherical absorbent material is placed in a ball-forming plate, the dry mixture is added and an aqueous solution is sprayed, and the dry mixture is wrapped on the spherical absorbent material under continuous rotation of a granulator to obtain an irregular absorbent composite material.

[0065] In the present invention, the aqueous solution is preferably prepared from aluminum sulfate, ferrous sulfate and water in a mass ratio of (1-5): (2-7): 200, and more preferably prepared from aluminum sulfate, ferrous sulfate and water in a mass ratio of 2: 3: 200. In the present invention, the mass ratio of the aqueous solution to the dry basis of the mixture is preferably (50-80): (128-203), and more preferably 55: 160.

[0066] In the present invention, the size of the irregular water-absorbing composite material is preferably 25 mm to 30 mm.

[0067] In the present invention, the vegetation layer is rooted in the organic soil layer and penetrates the slope-fixing material layer, and is specifically formed by growing vegetation after sowing plant seeds in the organic soil layer. In the present invention, the vegetation in the vegetation layer preferably includes one or more of Caragana microphylla, Hippophae rhamnoides, Adansonia sutchuenensis, Medicago sativa, Amorpha fruticosa, Tall Fescue, Ryegrass, Vetiver, White Clover and Cynodon dactylon. In the present invention, the vegetation layer can play the role of consolidating soil and conserving water, and greening the environment; the present invention can plant plants with high economic benefits such as forage grass in the vegetation layer, and the forage grass can be harvested every year, which not only achieves the purpose of greening, but also provides feed for the farm, forming a virtuous circle.

[0068] In the present invention, the provision of the water-absorbing fixed columns and the slope-fixing material layer can play the role of wind-proofing and slope-fixing as a whole, as well as absorbing the stored water under the fly ash pile, while achieving the effect of improving the physical and chemical properties of the soil and promoting the absorption of crop nutrients, thereby eliminating the need for maintenance irrigation. Combined with the provision of the vegetation layer, the dust problem in the ash storage yard can be permanently solved.

[0069] The present invention also provides an ecological restoration method for an ash storage yard of a coal-fired power plant, which uses the ecological restoration structure for an ash storage yard of a coal-fired power plant described in the above technical solution to fix the slope formed by the fly ash pile to be processed. In the present invention, the fixing method is specifically achieved by laying an organic soil layer according to the inclination angle of the slope formed by the fly ash pile to be processed, and setting a water-absorbing fixed column, so as to fix the slope; in addition, in order to ensure comprehensive ecological restoration of the fly ash pile to be processed, the highest point of the ecological restoration structure for the ash storage yard of a coal-fired power plant needs to be set to the top surface of the fly ash pile.

[0070] The present invention provides an ecological restoration structure and ecological restoration method for ash storage yards of coal-fired power plants, wherein the ecological restoration structure for ash storage yards of coal-fired power plants comprises: an organic soil layer; a plurality of water-absorbing fixed columns in contact with the lower surface of the organic soil layer; a slope-fixing material layer covering the upper surface of the organic soil layer; and a vegetation layer rooted in the organic soil layer and penetrating the slope-fixing material layer. Compared with the prior art, the outermost layer of the ecological restoration structure provided by the present invention is a vegetation layer, and the greening covers the ash storage yard. At the same time, combined with the arrangement of the water-absorbing fixed columns and the slope-fixing material layer, it can prevent wind and fix the slope, and can also draw the stored water under the fly ash pile, so that no maintenance and irrigation are required, and the dust problem of the ash storage yard can be permanently solved, while the fly ash can be comprehensively utilized.

[0071] In addition, the present invention can plant plants with high economic benefits such as forage grass in the vegetation layer, and the forage grass can be harvested every year, which not only achieves the purpose of greening, but also can provide feed for the farm, forming a virtuous circle.

[0072] In order to further illustrate the present invention, the following examples are provided for detailed description.

[0073] Example 1

[0074] See also Figure 2 , Figure 2 A schematic diagram of an ecological restoration structure for an ash storage yard of a coal-fired power plant provided in Example 1 of the present invention; wherein 1 is an organic soil layer formed by humus soil, 2 is a water-absorbing fixed column, 3 is a slope-fixing material layer formed by an irregular water-absorbing composite material, 4 is a vegetation layer formed by forage grass, 5 is a porous fixed column, 6 is a spherical water-absorbing material, a represents a fly ash pile, and b represents the top surface.

[0075] (1) Preparation of spherical water-absorbing material:

[0076] 2 parts by weight of aluminum sulfate, 3 parts by weight of ferrous sulfate and 200 parts by weight of water are prepared into an aqueous solution for later use;

[0077] 100 parts by weight of fly ash, 20 parts by weight of cement and 10 parts by weight of highly absorbent resin are placed in a ball-forming tray and mixed evenly; 43 parts by weight of an aqueous solution are sprayed and added during the stirring process; a ball-making machine is used for granulation; and the diameter fluctuation of the embryo ball is controlled to be between 10 mm and 15 mm; the finished product is cured at 25° C. for 24 hours for use; the porosity of the prepared spherical absorbent material is 47.34%, the cylinder pressure strength is 3.6 MPa, and the water absorption rate reaches 123.2%.

[0078] (2) Preparation of irregular water-absorbing composite materials:

[0079] 15 parts by weight of cement, 25 parts by weight of attapulgite clay, 20 parts by weight of super absorbent resin, 10 parts by weight of sulfur powder, 25 parts by weight of humic acid, 20 parts by weight of urea and 45 parts by weight of dry cattle and sheep manure are uniformly mixed to obtain a dry mixture; the spherical absorbent material obtained in step (1) is placed in a ball-forming disk, the ball-forming disk is rotated, and 55 parts by weight of an aqueous solution is sprayed and added, and the dry mixture is wrapped on the mother ball under the continuous rotation of a granulator, so as to prepare an irregular-shaped absorbent composite material with a size of 25 mm to 30 mm for use.

[0080] (3) Forming an ecological restoration structure for coal-fired power plant ash storage areas:

[0081] The porous fixed column is filled with the spherical water-absorbing material obtained in step (1) to obtain a water-absorbing fixed column; the water-absorbing fixed column is placed at intervals of 70 cm on the side slope of the fly ash pile, and then a 10 cm thick humus soil is covered on the side slope of the fly ash pile to form an organic soil layer, and each of the water-absorbing fixed columns is extended into the organic soil layer for fixation; then grass seeds (seeds of sea buckthorn, alfalfa, and bermudagrass) are sown in the organic soil layer, and the soil is kept moist before sowing. When the water seeps down and the soil is slightly dry, sowing is carried out, and the sowing density is 15 g / m 2 ~20g / m2 , covering soil within 0.5 cm, and irrigating after sowing; finally, laying a 30 cm thick irregular water-absorbing composite material obtained in step (2) on the organic soil layer to form a slope-fixing material layer; the grass seeds subsequently grow into a vegetation layer; forming an ecological restoration structure for the ash storage yard of a coal-fired power plant.

[0082] The ecological restoration structure for the ash storage yard of a coal-fired power plant in Example 1 of the present invention was used to conduct a small-area governance experiment in the ash storage yard of a coal-fired power plant, and the governance effect was remarkable. The experimental results show that after one year of governance, the average growth height of the plants reached 2.5 cm; after three years of governance, the vegetation coverage rate increased from 1% to 88%, effectively reducing dust; the planting of herbaceous plants formed a three-dimensional criss-cross root network structure, and also formed a considerable root system in the ash, so that the covering soil and the ash were integrated, and the water and soil maintenance effect was very obvious; planting on the covering soil not only played a role in fixing ash and preventing dust, but also produced good economic benefits: alfalfa and bermudagrass were excellent forage grasses, with an annual yield of more than 2,000 catties per mu, 2,500 yuan / ton, and an annual economic benefit of 5,000 yuan per mu.

[0083] To sum up, the ecological restoration structure and ecological restoration method for the ash storage yard of a coal-fired power plant provided by the present invention can not only consume a large amount of fly ash generated by the coal-fired power plant, but also can prevent wind and sand, regulate the climate, conserve water sources, maintain water and soil, block dust, and purify the air; using the ash field planting method to control dust pollution can green and beautify the natural environment of the ash storage yard, and is easy to maintain and manage, and can effectively solve the dust problem of the ash storage yard before the comprehensive utilization of fly ash, and treat waste with waste, turning waste into treasure, and can also harvest crops such as forage grass every year, achieving the purpose of greening, and has great economic benefits, forming a virtuous circle.

[0084] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An ecological restoration structure for an ash storage yard of a coal-fired power plant, comprising: organic soil layer; a number of water-absorbing fixed columns in contact with the lower surface of the organic soil layer; A layer of slope stabilization material covering the upper surface of the organic soil layer; The vegetation layer is rooted in the organic soil layer and penetrates the slope stabilization material layer; The water absorbing fixed column comprises: Porous fixed column; A spherical water-absorbing material disposed inside the porous fixed column; The length of the water absorbing fixed column is ≥50cm and the diameter is 20cm~30cm; The spherical water-absorbing material is prepared from fly ash, cement, a highly absorbent resin and an aqueous solution in a mass ratio of (90-120): (18-32): (8-12): (40-65); the aqueous solution is prepared from aluminum sulfate, ferrous sulfate and water in a mass ratio of (1-5): (2-7): 200; The diameter of the spherical water-absorbing material is 10 mm to 15 mm; The slope-fixing material layer is composed of irregular water-absorbing composite materials; The thickness of the slope-fixing material layer is 25 cm to 35 cm; The irregular water-absorbing composite material comprises: Spherical water-absorbing material; A dry base of a mixture wrapping the spherical water-absorbing material; The size of the irregular water-absorbing composite material is 25 mm to 30 mm; The preparation method of the irregular water-absorbing composite material is specifically as follows: Cement, attapulgite clay, super absorbent resin, sulfur powder, humic acid, urea and dry cattle and sheep dung are mixed uniformly in a mass ratio of (10-20): (20-30): (15-30): (8-13): (20-35): (15-25): (40-50) to obtain a dry mixture; a spherical absorbent material is placed in a ball-forming plate, the dry mixture is added and an aqueous solution is sprayed, and the dry mixture is wrapped on the spherical absorbent material under continuous rotation of a granulator to obtain an irregular absorbent composite material; The aqueous solution is prepared from aluminum sulfate, ferrous sulfate and water in a mass ratio of (1-5):(2-7):

200.

2. The ecological restoration structure for the ash storage yard of a coal-fired power plant according to claim 1 is characterized in that: The organic soil layer is composed of humus soil; The thickness of the organic soil layer is 5 cm to 20 cm.

3. The ecological restoration structure for the ash storage yard of a coal-fired power plant according to claim 1 is characterized in that: The preparation method of the spherical water-absorbing material is specifically as follows: The fly ash, cement, super absorbent resin and aqueous solution are granulated on a spherical plate, and then cured at 20°C to 30°C for 20h to 30h to obtain a spherical absorbent material.

4. The ecological restoration structure for the ash storage yard of a coal-fired power plant according to claim 1 is characterized in that: The vegetation in the vegetation layer includes one or more of Caragana microphylla, Hippophae rhamnoides, Astragalus membranaceus, Medicago sativa, Amorpha fruticosa, Fescue australis, Lolium perenne, Vetiver, Trifolium repens and Cynodon dactylon.

5. An ecological restoration method for an ash storage yard of a coal-fired power plant, characterized in that: The ecological restoration structure for the ash storage yard of a coal-fired power plant as described in any one of claims 1 to 4 is used to fix the slope formed by the fly ash pile to be processed.

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