Fly ash based planting-irrigation integrated sand barrier sand control system

Abstract

The invention provides a sand barrier sand control system based on fly ash base planting-irrigation integration, and belongs to the technical field of ecological environment treatment. The coal ash-based prefabricated sand-protecting barrier comprises a coal ash-based prefabricated sand-protecting barrier which is prepared from coal ash and a chemical degradable adhesive; the coal ash-based improved soil is filled in the coal ash-based prefabricated sand barrier, is used for planting drought-enduring plants, and is formed by mixing sandy soil and coal ash; the irrigation system is used for supplying water to the drought-enduring plants. The planting-irrigation integrated sand barrier desertification control system is constructed through collaborative design of the coal ash-based prefabricated sand barrier, soil improvement in the sand barrier and a drip irrigation system, and organic combination of desertification control and waste resource utilization is achieved. The system has the advantages of being low in material cost, easy and convenient to install and maintain, water-saving, efficient in irrigation, lasting in soil improvement effect and the like, rapid greening of desertification control plants and ecological environment improvement can be synchronously achieved, and the concepts of low carbon, environmental protection and sustainable development are met.

Description

Technical Field

[0001] This invention relates to the field of ecological environment governance technology, and in particular to a sand barrier control system based on fly ash-based integrated planting and irrigation, which is applicable to desert photovoltaic area control or field desertification control. Background Technology

[0002] The resource utilization of fly ash, a traditional waste product from thermal power plants, has always been a challenge in the industry. Currently, widely used sand barrier systems for desertification control primarily employ plant straw and biodegradable sandbags to prevent dune movement. However, many early patents failed to utilize the biodegradable materials from these sand barriers for plant growth, and they also require significant labor and maintenance costs, resulting in low scalability and economic viability. Therefore, improvements to existing technologies, sand barrier materials, and the overall desertification control system are necessary. Summary of the Invention

[0003] In view of this, to address the technical problems of high material costs, difficult maintenance, and insufficient resource utilization of fly ash from thermal power plants in existing sand barrier desertification control systems, this invention provides a fly ash-based integrated planting-irrigation sand barrier desertification control system. Using fly ash as the core material, this system constructs an integrated planting-irrigation sand barrier desertification control system through the coordinated design of fly ash-based prefabricated sand barriers, soil improvement within the sand barriers, and a drip irrigation system, achieving an organic combination of desertification control and waste resource utilization. This system features low material costs, simple installation and maintenance, water-saving and efficient irrigation, and long-lasting soil improvement effects. It can simultaneously achieve rapid greening of desertification control plants and ecological environment improvement, aligning with the concepts of low-carbon environmental protection and sustainable development.

[0004] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a sand barrier control system based on fly ash-based integrated planting and irrigation, comprising: Fly ash-based prefabricated sand barriers are made of fly ash and chemically biodegradable binders. Fly ash-based modified soil is filled into the fly ash-based prefabricated sand barrier for planting drought-resistant plants. It is composed of a mixture of sand and fly ash. An irrigation system for supplying water to the drought-resistant plants.

[0005] Preferably, the mass ratio of sand to fly ash is 1:1.

[0006] Preferably, the fly ash soil improvement part (2) inside the sand barrier is an improved soil based on a mixture of sand and fly ash. Specifically, in order to make the sand barrier more conducive to the growth of sand-fixing plants, the sand and fly ash are mixed in a 1:1 ratio according to the volume ratio of the top 20cm soil layer inside the sand barrier.

[0007] Preferably, the drought-resistant plant is at least one of Haloxylon ammodendron, Calligonum mongolicum, Caragana korshinskii, and Salix matsudana.

[0008] Preferably, the irrigation system includes an inlet pipe, an outlet pipe, and a drip irrigation pipe with drip irrigation holes that are connected to each other; the drip irrigation pipe is laid in the middle surface sand of the fly ash-based precast sand barrier.

[0009] Compared with the prior art, the present invention has the following beneficial effects: Waste resource utilization: Using fly ash from thermal power plant waste as the core material, it replaces traditional straw, biodegradable sandbags and other sand barrier materials, realizing the recycling of solid waste, conforming to the concept of low carbon and environmental protection, and reducing the production cost of sand barriers.

[0010] Soil improvement and plant adaptation: The 0-20cm soil layer is improved by mixing fly ash and sand in a 1:1 ratio. The large specific surface area and porous structure of fly ash reduce water evaporation, improve the soil's water and fertilizer retention capacity, promote plant nutrient absorption, and adapt to the growth needs of plants in arid areas.

[0011] Precision water-saving irrigation: The drip irrigation system delivers water directly to the plant root zone, reducing water evaporation and waste; it supports deficit irrigation and integrated water and fertilizer operation, and fertilizer can be applied simultaneously during special drought periods to ensure efficient plant growth.

[0012] Low cost and easy to promote: The system has low cost, simple and reliable technology, and prefabricated sand barriers can be manufactured in factories in different locations or made and installed on-site, reducing labor and maintenance costs. It is suitable for desert management in arid and semi-arid regions and ecological improvement of desert photovoltaic areas.

[0013] Sustainable ecological restoration: By combining the planting of suitable and cold-resistant plants such as Haloxylon ammodendron and Calligonum mongolicum, rapid greening and long-term ecological restoration of desert areas can be achieved; the system can simultaneously collect crop growth and soil environment data, support remote monitoring and effect evaluation, and provide data support for the optimization of desertification control solutions. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; In the diagram: 1. Fly ash-based prefabricated sand barrier; 2. Fly ash-based improved soil; 3. Irrigation system; 4. Drought-resistant plants; 5. Drip irrigation holes; 6. Inlet pipe; 7. Outlet pipe. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0016] Currently, widely used sand barrier systems for desertification control primarily employ plant straw and biodegradable sandbags to prevent dune movement. However, many early patents failed to integrate sand barriers with plant growth and the materials used in the barriers themselves, and also required significant labor and maintenance costs, resulting in low scalability and economic viability. Therefore, improvements to existing technologies, sand barrier materials, and the overall desertification control system are necessary.

[0017] This invention patent addresses existing problems by designing a novel sand barrier control system that reuses fly ash, a traditional waste product from thermal power plants. This system can solve the problem of low soil nutrients in deserts and also make good use of fly ash for integrated planting.

[0018] Therefore, such as Figure 1 As shown, this invention provides a sand barrier control system based on fly ash-based integrated planting and irrigation, comprising: The fly ash-based precast sand barrier 1 is made of fly ash and a chemically biodegradable adhesive. Using a pre-made mold, the fly ash and adhesive are mixed to create a semi-liquid mortar similar to concrete. This mortar is then poured into the mold, shaped, and allowed to dry to form the fly ash-based precast sand barrier 1. This sand barrier requires only fly ash and a chemical adhesive, both of which are biodegradable, making it easy to install in deserts. The fly ash-based precast sand barrier 1 is used to replace traditional straw or biodegradable sandbags. The chemically biodegradable adhesive can be selected from plant fiber adhesives, starch adhesives, etc. The types of chemically biodegradable adhesives mentioned are merely illustrative examples; those skilled in the art can choose other types of adhesives according to actual needs, and no special requirements are made.

[0019] Fly ash-based improved soil 2 is filled into the fly ash-based prefabricated sand barrier 1 for planting drought-resistant plants 4. It is made of sand and fly ash to improve the soil of sandy soil or desert ecosystem to make it more suitable for plant growth.

[0020] Irrigation system 3 is used to supply water to the drought-resistant plants 4, so as to achieve rapid growth and greening of the plants used for desertification control in arid areas.

[0021] The irrigation system 3 can be powered by solar energy and can collect rainfall for irrigation. It can determine the corresponding amount of fertilizer and water based on the specific growth of field crops and the actual soil conditions, saving the corresponding manpower and material resources for irrigation and fertilization, and is highly operable.

[0022] This invention integrates multiple functions such as fly ash-based prefabricated sand barriers 1, fly ash-based soil improvement and irrigation system 3, to achieve rapid and effective desertification control, effectively avoid water waste, and recycle fly ash, a waste product of traditional thermal power. The system is low-cost, simple and reliable. By reusing fly ash, it realizes the low-carbon approach of recycling traditional thermal power waste into desert photovoltaic new energy. It has environmental protection and green characteristics, and is particularly suitable for desertification control and ecological environment improvement in arid and semi-arid regions and desert photovoltaic systems.

[0023] This invention utilizes prefabricated sand barriers (1) based on fly ash to achieve windbreak and sand fixation, replacing traditional straw or biodegradable sandbags. It optimizes the soil structure within the sand barriers by using a mixture of sand and fly ash to improve water and fertilizer retention. A supporting irrigation system (3) provides precise water supply to drought-resistant plants (4). These three elements work synergistically to construct an integrated desertification control system of "sand barrier fixation + soil improvement + precision irrigation," achieving both desertification control and vegetation cover. The recycling of fly ash from thermal power plant waste reduces the cost of sand barrier materials, aligning with low-carbon and environmentally friendly principles. The integrated design combines windbreak and sand fixation, soil improvement, and plant growth needs, simplifying the desertification control process. It is suitable for desert photovoltaic areas and outdoor desertification control scenarios, with a wide range of applications.

[0024] In this invention, the mass ratio of sand and fly ash is 1:1. Utilizing the large specific surface area and porous structure of fly ash, drip irrigation water evaporation is reduced, while simultaneously enhancing the soil's ability to adsorb and supply nutrients, creating a suitable soil environment for plant growth and facilitating nutrient absorption. The precise ratio balances soil water retention and aeration, preventing excessive water evaporation. The porous structure of fly ash enhances soil nutrient adsorption, promoting nutrient absorption by plant roots. The materials are widely available, the improvement cost is low, and the invention is highly operable.

[0025] In this invention, the fly ash soil improvement part (2) inside the sand barrier is an improved soil based on a mixture of sand and fly ash. Specifically, in order to make the sand barrier more conducive to the growth of sand-fixing plants, the sand and fly ash are mixed in a 1:1 ratio according to the volume ratio of the top 20cm soil layer inside the sand barrier.

[0026] In this invention, the drought-resistant plant 4 is at least one of Haloxylon ammodendron, Calligonum mongolicum, Caragana korshinskii, and Salix psammophila. Utilizing their drought-resistant and barren-tolerant biological characteristics, they rapidly take root and grow in the improved sandy soil, achieving vegetation cover in desert areas. The plant species are adapted to the extreme desert environment, have a high survival rate, and can quickly play a role in sand fixation and ecological restoration. Native plants are highly adaptable to the regional climate, requiring no additional special care, reducing later maintenance costs. Combining multiple plant species can construct a diverse desert vegetation community, enhancing ecosystem stability.

[0027] In this invention, the irrigation system 3 includes an interconnected inlet pipe 6, an outlet pipe 7, and a drip irrigation pipe with drip irrigation holes 5. The drip irrigation pipe is laid in the middle surface sand layer of the fly ash-based precast sand barrier 1, directly delivering water to the plant root zone, reducing water loss through evaporation and seepage during transmission. It also supports integrated water and fertilizer management, adding fertilizer to the irrigation water to simultaneously meet the plant's water and nutrient needs. Drip irrigation provides precise water supply, significantly reducing water waste and adapting to arid and water-scarce desert environments. The drip irrigation pipe is laid close to the plant root zone, improving water use efficiency and promoting rapid plant growth. It can be expanded to include integrated water and fertilizer management, allowing for simultaneous fertilization during drought periods to enhance plant resilience. The modular design of the pipeline system makes installation and maintenance simple, suitable for large-scale desert management scenarios.

[0028] The present invention also provides the following manufacturing process: Fabrication of fly ash-based precast sand barrier 1: Fly ash and a chemically biodegradable adhesive are mixed, poured into a mold, shaped, and allowed to dry to obtain fly ash-based precast sand barrier 1, approximately 5cm thick, with dimensions of 50cm x 50cm square. The dimensions of fly ash-based precast sand barrier 1 can be adjusted according to different needs. For example, the size of the sand barrier can be adjusted for different sand types. Fly ash is bonded together according to the mold to form a square sand barrier.

[0029] The fly ash-based improved soil 2 inside the precast sand barrier 1 is an internal sand soil improvement operation carried out after the sand barrier is installed. Specifically, fly ash and sand inside the sand barrier are mixed in a mass ratio of 1:1.

[0030] The drip irrigation system includes the installation of drip irrigation pipes. According to the division of areas, due to water pressure, the main water inlet pipe 6 is divided into several secondary water inlet pipes 6. Drip irrigation tapes are installed on the secondary water inlet pipes 6 to ensure the normal operation of the drip irrigation system inside the sand barrier.

[0031] Finally, plant 4 drought-resistant plants.

[0032] The fabrication of fly ash-based precast sand barriers can be carried out either by manufacturing the molds and sand barriers at a different factory, or by fabricating and installing the sand barriers on-site. This depends on the transportation cost of the raw material, fly ash. Furthermore, for the entire system, the drip irrigation system can employ deficit irrigation or achieve integrated water and fertilizer management. In the event of severe drought, fertilizer can be added to the water to promote the long-term and effective growth of desertification control plants, ultimately achieving a sustainable and permanent greening effect. Those skilled in the art can choose the appropriate method based on their practical experience.

[0033] To visually demonstrate the technical features and advantages of this invention, experimental examples are presented to illustrate the outstanding advantages of sand barriers in water conservation and promoting plant growth. This embodiment compares the performance of the sand barrier of this invention, traditional straw sand barriers, and biodegradable white sandbag sand barriers in terms of crop growth and irrigation efficiency through field trials.

[0034] Experimental Design: Two 10m × 10m experimental zones were set up on shifting sand dunes with identical site conditions. Experimental Zone: Sand barriers of the present invention were laid. Control Zone: Traditional straw sand barriers and biodegradable white sandbag sand barriers were laid. Both zones received equal amounts of irrigation water and were planted with the same vegetation, specifically sand willow.

[0035] Observation indicators: Plant height, stem diameter, root water content, and root length were observed 3 months after sowing.

[0036] The experimental results are shown in Table 1 below.

[0037] Table 1 Comparison of vegetation restoration effects of different planting methods

[0038] Results show that, according to the experimental results, the fly ash sand barrier of the present invention has great advantages in terms of plant water utilization and plant growth promotion. In particular, for root water content and plant height, the sand barrier of the present invention is significantly greater than the corresponding indicators of plants under the other two sand barriers.

[0039] The above description is merely a preferred embodiment of the present invention. However, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention should be covered within the scope of protection of the present invention.

Claims

1. A sand barrier sand control system based on fly ash-based planting-irrigation integration, characterized in that, include: Fly ash-based prefabricated sand barriers are made of fly ash and chemically biodegradable binders. Fly ash-based modified soil is filled into the fly ash-based prefabricated sand barrier for planting drought-resistant plants. It is composed of a mixture of sand and fly ash. An irrigation system for supplying water to the drought-resistant plants.

2. The sand barrier sand-controlling system based on fly ash and integrating planting and irrigation according to claim 1, characterized in that, The mass ratio of sand to fly ash is 1:

1.

3. The sand barrier sand-controlling system based on fly ash and integrating planting and irrigation according to claim 1, characterized in that, The fly ash soil improvement part inside the sand barrier (2) is based on the improvement of soil by mixing sand and fly ash. Specifically, in order to make the sand barrier more conducive to the growth of sand-fixing plants, the sand and fly ash are mixed in a 1:1 ratio according to the volume ratio of the top 20cm soil layer inside the sand barrier.

4. The sand barrier sand-controlling system based on fly ash and integrating planting and irrigation according to claim 1, characterized in that, The drought-resistant plant is at least one of Haloxylon ammodendron, Calligonum mongolicum, Caragana korshinskii, and Salix matsudana.

5. The fly ash-based planting-irrigation integrated sand barrier sand control system according to claim 1, characterized in that, The irrigation system includes an inlet pipe, an outlet pipe, and a drip irrigation pipe with drip irrigation holes that are connected to each other; the drip irrigation pipe is laid in the middle surface sand of the fly ash-based precast sand barrier.

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