An ecological circulation system based on resource utilization of fly ash
By designing an ecological cycle system based on fly ash, including soil conditioner preparation, facility agriculture, anaerobic fermentation and purification devices, the problem of insufficient utilization of fly ash resources has been solved, achieving efficient resource utilization and environmental protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING CPCEP ENERGY CONSERVATION & ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-23
AI Technical Summary
In existing technologies, soil conditioners made from fly ash, when applied in facility agriculture devices, often result in the lack of effective utilization of crop scraps or waste, making it impossible to build a complete ecological cycle system and industrial chain, leading to poor resource utilization.
Design an ecological cycle system based on the resource utilization of fly ash, including soil conditioner preparation, facility agriculture, anaerobic fermentation, separation and purification devices. Through these devices, realize the rational integration and utilization of resources, and build a complete ecological cycle system and industrial chain.
It achieves efficient use of resources, builds a complete ecological cycle system and industrial chain, improves resource utilization efficiency, generates revenue, and has environmental benefits.
Smart Images
Figure CN224394850U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of resource utilization technology, specifically relating to an ecological cycle system based on the resource utilization of fly ash. Background Technology
[0002] Currently, fly ash has become the largest single source of solid pollution in China, with its annual output increasing year by year. At the same time, fly ash has unique gel properties, as well as distinctive spherical structure and particle size distribution, which gives it a variety of potential comprehensive utilization values. Soil conditioners prepared based on fly ash have become a research direction for many researchers.
[0003] However, when soil conditioners made from fly ash in related technologies are applied to facility agriculture equipment, the crop scraps or waste produced by the facility agriculture equipment lack utilization methods, making it impossible to build a relatively complete ecological cycle system or form a relatively complete industrial chain. As a result, there is a problem of poor resource utilization efficiency, which needs to be improved. Utility Model Content
[0004] In order to solve all or some of the above problems, the purpose of this utility model is to provide an ecological cycle system based on the resource utilization of fly ash, which can realize the rational integration and utilization of resources, build a relatively complete ecological cycle system and industrial chain, thereby improving resource utilization efficiency.
[0005] This utility model provides an ecological recycling system based on the resource utilization of fly ash, comprising:
[0006] A soil conditioner preparation device for preparing soil conditioners using fly ash;
[0007] Facility agriculture equipment used for growing crops using soil conditioners;
[0008] Anaerobic fermentation device is used to ferment the crop scraps or waste produced by the facility agriculture device to obtain biogas, biogas slurry and biogas residue;
[0009] A separation device is used to separate the biogas slurry and biogas residue produced by the anaerobic fermentation device;
[0010] A purification device is used to purify and separate the biogas produced by the anaerobic fermentation device to obtain biogas and carbon dioxide.
[0011] Optionally, the biogas slurry produced by the separation device can be used in the facility agriculture device, and the biogas residue produced can be used to make agricultural organic fertilizer and supplied to the facility agriculture device.
[0012] Optionally, the biogas produced by the purification unit can be used to generate electricity in a natural gas cogeneration unit and supplied to the soil conditioner preparation unit.
[0013] Optionally, the biogas produced by the purification unit can be used to produce hydrogen.
[0014] Optionally, the ecological cycle system also includes a sustainable aviation fuel production unit, which is capable of producing sustainable aviation fuel using carbon dioxide produced by the purification unit.
[0015] Optionally, the ecological recycling system includes a power generation unit, a hydrogen production unit, and a synthesis unit. The power generation unit is used to provide electrical energy to the hydrogen production unit, the hydrogen production unit is used to electrolyze water to produce hydrogen, and the synthesis unit is used to synthesize hydrogen and carbon dioxide to produce sustainable aviation fuel.
[0016] Alternatively, hydrogen produced from biogas can be used in the synthesis apparatus to produce sustainable aviation fuel.
[0017] Optionally, the biogas produced by the purification unit can be used to generate electricity in a natural gas cogeneration unit and supplied to the hydrogen production unit.
[0018] Optionally, the power generation device adopts wind power generation, solar power generation or wind-solar hybrid power generation, and is equipped with an energy storage system.
[0019] Optionally, the facility agriculture device may be a vegetable greenhouse, a cash crop greenhouse, or an aquaponics greenhouse.
[0020] As can be seen from the above technical solution, the ecological recycling system based on fly ash resource utilization provided by this utility model has the following advantages:
[0021] This ecosystem can achieve the rational integration and utilization of resources, build a relatively complete ecological cycle system and industrial chain, improve resource utilization efficiency, generate revenue, and enhance environmental protection.
[0022] Other features and advantages of this invention will be set forth in the following description. Attached Figure Description
[0023] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.
[0024] Figure 1 This is a schematic diagram of the ecological cycle system in an embodiment of this utility model.
[0025] Explanation of reference numerals in the attached figures:
[0026] 1. Soil conditioner preparation equipment; 2. Facility agriculture equipment; 3. Anaerobic fermentation equipment; 4. Separation equipment; 5. Purification equipment; 6. Sustainable aviation fuel production equipment; 61. Power generation equipment; 62. Hydrogen production equipment; 63. Synthesis equipment. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be arbitrarily combined with each other.
[0028] like Figure 1 The present invention is illustrated in the embodiment of the present invention. This embodiment discloses an ecological cycle system based on the resource utilization of fly ash, including a soil conditioner preparation device 1, a facility agriculture device 2, an anaerobic fermentation device 3, a separation device 4, and a purification device 5. The soil conditioner preparation device 1 can use fly ash to prepare soil conditioners, and the facility agriculture device 2 can use the soil conditioners to grow crops to increase crop productivity.
[0029] In one embodiment, such as Figure 1 As shown, the anaerobic fermentation device 3 can ferment vegetable scraps or waste, straw and other crops produced by the facility agriculture device 2 to obtain biogas, biogas slurry and biogas residue. The separation device 4 can separate the biogas slurry and biogas residue produced by the anaerobic fermentation device 3. The biogas slurry produced can be used by the facility agriculture device 2, and the biogas residue produced can be used to make agricultural organic fertilizer and supplied to the facility agriculture device 2.
[0030] In one embodiment, such as Figure 1 As shown, the purification unit 5 can purify and separate the biogas produced by the anaerobic fermentation unit 3 to obtain biomethane and carbon dioxide. The biomethane produced can be used in a natural gas cogeneration unit to generate electricity and supply the soil conditioner preparation unit 1. Simultaneously, the biomethane produced by the purification unit 5 can also be used to produce hydrogen, thereby improving resource utilization efficiency.
[0031] In this embodiment, the soil conditioner preparation device 1 is prepared by alkaline hydrothermal reaction method. The fly ash particle size range of the selected soil conditioner is 10-100 micrometers (preferably 20-50 micrometers). The alkaline solution is prepared from sodium hydroxide solution with a concentration of 1-5 mol / L (preferably 2 mol / L).
[0032] The alkali-to-ash ratio participating in the hydrothermal reaction is 0.1-1.5, the hydrothermal pressure is 0.1-1.2 MPa, and the residence time is 2-12 h. Preferably, the alkali-to-ash ratio is 0.4-1.2, the reaction pressure is 0.6 MPa, and the residence time is 6 h. The material used for the soil conditioner preparation device 1 is a heat-resistant and corrosion-resistant material, preferably 316L stainless steel. Furthermore, the amount of soil conditioner produced in this embodiment used for saline-alkali land improvement is 0.2-1.5 t / mu.
[0033] The alkali-to-ash ratio participating in the hydrothermal reaction is 0.1-1.5, the hydrothermal pressure is 0.1-1.2 MPa, and the residence time is 2-12 h. Preferably, the alkali-to-ash ratio is 0.4-1.2, the reaction pressure is 0.6 MPa, and the residence time is 6 h. The material used for the soil conditioner preparation device 1 is a heat-resistant and corrosion-resistant material, preferably 316L stainless steel. Furthermore, the amount of soil conditioner produced in this embodiment used for saline-alkali land improvement is 0.2-1.5 t / mu.
[0034] In this embodiment, the facility agriculture device 2 is a vegetable greenhouse, a cash crop greenhouse, or an aquaponics greenhouse, preferably an aquaponics greenhouse. The anaerobic fermentation device 3 is a CSTR reactor, and the purification device 5 is a PSA pressure swing adsorption device. Meanwhile, the soil conditioner preparation device 1, the anaerobic fermentation device 3, the separation device 4, and the purification device 5 are all existing devices, and the specific structure of each device will not be described in detail here.
[0035] In one embodiment, such as Figure 1 As shown, the ecological cycle system also includes a sustainable aviation fuel production unit 6, which can use the carbon dioxide produced by the purification unit 5 to produce sustainable aviation fuel, thereby improving resource utilization efficiency.
[0036] In one embodiment, such as Figure 1 As shown, the ecological recycling system includes a power generation unit 61, a hydrogen production unit 62, and a synthesis unit 63. The power generation unit 61 provides electricity to the hydrogen production unit 62, which electrolyzes water to produce hydrogen. The synthesis unit 63 synthesizes hydrogen and carbon dioxide to produce sustainable aviation fuel. In this embodiment, the synthesis unit 63 employs the Fischer-Tropsch synthesis process or via the methanol-MtJ process.
[0037] In this embodiment, the hydrogen produced from biogas can be used in the synthesis unit 63 to produce sustainable aviation fuel. Meanwhile, the biogas produced by the purification unit 5 can be used in the natural gas cogeneration unit to generate electricity and supply it to the hydrogen production unit 62.
[0038] In this embodiment, the power generation unit 61 uses wind power, solar power, or a wind-solar hybrid power generation system, preferably a wind-solar hybrid system with an energy storage device. Furthermore, the power generation unit 61 complements the biogas cogeneration unit, meaning the entire system's energy supply is primarily provided by the power generation unit 61, with some energy supplied by the biogas cogeneration unit when energy is insufficient. The power generation unit 61, hydrogen production unit 62, and synthesis unit 63 all utilize existing equipment; their specific structures will not be elaborated upon here.
[0039] In this embodiment of the ecological cycle system, fly ash is initially sorted and then sent to soil conditioner preparation device 1. The prepared soil conditioner is sent to saline-alkali land for soil improvement. Facility agriculture device 2 uses the improved soil to grow crops.
[0040] Vegetable scraps and crop straw obtained from facility agriculture unit 2 are fed into anaerobic fermentation unit 3 for fermentation. The resulting biogas is purified and separated to obtain biomethane and high-concentration carbon dioxide. Part of the biomethane is sold or used for hydrogen production, while the remainder is fed into a biomethane cogeneration unit for power generation and heating to provide energy for soil conditioner preparation unit 1. The high-concentration carbon dioxide is primarily used for the synthesis of sustainable aviation fuel, and some can also be used in the production process of facility agriculture unit 2.
[0041] After the biogas slurry and biogas residue are separated, the biogas slurry is directly used in the production of facility agriculture device 2, while the biogas residue is made into organic fertilizer, part of which is sold externally and part of which is used in facility agriculture device 2. The electricity generated by power generation device 61 is partially supplied to hydrogen production device 62, and the hydrogen and carbon dioxide are used for the production of sustainable aviation fuel.
[0042] To more clearly illustrate this embodiment, the operation method of this embodiment is as follows:
[0043] After preliminary screening, fly ash is screened a second time to obtain fly ash with a particle size range of 20-50 micrometers. It is then fed into soil conditioner preparation device 1, and a sodium hydroxide solution with a concentration of 2 mol / L is added at the same time. The alkali-ash ratio is adjusted to 0.5. After stirring evenly, the mixture is heated to 0.6 MPa and held for 6 hours. After depressurization, the mixture is separated and dried to obtain the soil conditioner.
[0044] Soil conditioner is applied to the saline-alkali land requiring improvement via machine spreading at a specific dosage, followed by rotary tillage for remediation. The remediation cycle is generally 6-12 months. The remediated saline-alkali land is used in facility agriculture unit 2, and the agricultural residues generated during facility agriculture are sent to anaerobic fermentation unit 3. The biogas residue produced by anaerobic fermentation is used to prepare organic fertilizer, which is supplied to facility agriculture unit 2 or sold externally. The biogas slurry is sent to facility agriculture unit 2 for irrigation.
[0045] After purification, part of the biogas is sent to a combined heat and power (CHP) unit for power generation and heating, while some biomethane is sold or used to produce hydrogen. The majority of the byproducts of biogas purification (high-concentration carbon dioxide) is used to synthesize sustainable aviation fuel, with a small portion sent to facility agriculture unit 2 for increased production. The electricity generated by power generation unit 61 is used for water electrolysis to produce hydrogen, which is then synthesized into sustainable aviation fuel using the Fischer-Tropsch process.
[0046] As can be seen from the above process, this ecosystem can achieve the rational integration and utilization of resources, build a relatively complete ecological cycle system and industrial chain, improve resource utilization efficiency, generate income, and enhance environmental protection.
[0047] It should be noted that, unless otherwise stated, the technical or scientific terms used in this utility model shall have the ordinary meaning as understood by those skilled in the art to which this utility model pertains.
[0048] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.
[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. An ecological recycling system based on the resource utilization of fly ash, characterized in that, include: Soil conditioner preparation device (1), used to prepare soil conditioner using fly ash; Facility agriculture equipment (2) for growing crops using soil conditioners; Anaerobic fermentation device (3) is used to ferment the crop scraps or waste produced by the facility agriculture device (2) to obtain biogas, biogas liquid and biogas residue; Separation device (4) is used to separate the biogas slurry and biogas residue produced by the anaerobic fermentation device (3); Purification device (5) is used to purify and separate the biogas produced by the anaerobic fermentation device (3) to obtain biogas and carbon dioxide.
2. The ecological cycle system according to claim 1, characterized in that, The biogas slurry produced by the separation device (4) can be used by the facility agriculture device (2), and the biogas residue produced can be used to make agricultural organic fertilizer and supplied to the facility agriculture device (2).
3. The ecological cycle system according to claim 1, characterized in that, The biogas produced by the purification device (5) can be used to generate electricity in a natural gas cogeneration unit and supplied to the soil conditioner preparation device (1).
4. The ecological cycle system according to claim 1, characterized in that, The biogas produced by the purification unit (5) can be used to produce hydrogen.
5. The ecological cycle system according to claim 3 or 4, characterized in that, The ecological cycle system also includes a sustainable aviation fuel production unit (6), which is capable of producing sustainable aviation fuel using carbon dioxide produced by the purification unit (5).
6. The ecological cycle system according to claim 5, characterized in that, The ecological recycling system includes a power generation unit (61), a hydrogen production unit (62), and a synthesis unit (63). The power generation unit (61) is used to provide electrical energy to the hydrogen production unit (62). The hydrogen production unit (62) is used to electrolyze water to produce hydrogen. The synthesis unit (63) is used to synthesize hydrogen and carbon dioxide to produce sustainable aviation fuel.
7. The ecological cycle system according to claim 6, characterized in that, Hydrogen produced from biogas can be used in the synthesis unit (63) to produce sustainable aviation fuel.
8. The ecological cycle system according to claim 6, characterized in that, The biogas produced by the purification unit (5) can be used to generate electricity in a natural gas cogeneration unit and supplied to the hydrogen production unit (62).
9. The ecological cycle system according to claim 6, characterized in that, The power generation device (61) adopts wind power generation, solar power generation or wind-solar hybrid power generation, and is equipped with an energy storage system.
10. The ecological cycle system according to claim 1, characterized in that, The facility agriculture device (2) adopts a vegetable greenhouse, a cash crop greenhouse or an aquaponics greenhouse.