Application of carbon dioxide in agricultural water and fertilizer integration

Abstract

The invention discloses application of carbon dioxide in agricultural water and fertilizer integration. The invention belongs to the technical field of water and fertilizers, effectively converts a large amount of carbon dioxide waste gas generated in industrial production into useful resources in agricultural production, reduces direct emission of carbon dioxide to the atmospheric environment, reduces the greenhouse gas effect, provides an economical and feasible waste gas treatment solution for industrial enterprises, and has a wide application prospect. The method has obvious environmental benefits and social benefits, and is beneficial to promotion of collaborative sustainable development of industry and agriculture; a proper amount of carbon dioxide is continuously supplied to soil around root systems of field crops, a sufficient carbon source is provided for photosynthesis of the crops, the photosynthesis efficiency of the crops is promoted, accumulation of photosynthetic products is increased, and therefore the yield and quality of the crops are remarkably improved; the limitation that carbon dioxide is only applied to greenhouse planting in a small amount is broken through, the carbon dioxide is innovatively applied to the field of field crop planting, large-scale and normalized application of carbon dioxide in agricultural production is achieved by combining with an advanced water and fertilizer integration technology, a new approach and space are opened up for agricultural modernization development, and the method has a wide application prospect. Wide market application prospects and popularization values are realized.

Description

Technical Field

[0001] The invention belongs to the technical field of water and fertilizer, and specifically refers to an application of carbon dioxide in agricultural water and fertilizer integration. Background Art

[0002] In today's highly industrialized era, the scale of industrial production continues to expand, but this has also brought a series of severe environmental challenges, among which the large-scale emission of carbon dioxide waste gas has become one of the focuses of global attention. Many industrial sectors, such as power plants, cement plants, steel plants and various chemical companies, will produce a large amount of carbon dioxide gas during the production process. According to statistics from the International Energy Agency (IEA), the global annual industrial carbon dioxide emissions have exceeded tens of billions of tons, and this figure is still on an upward trend year by year.

[0003] At present, there are many limitations in the treatment of industrial carbon dioxide waste gas. Traditional treatment methods are mainly concentrated in the fields of geological storage, marine storage and chemical conversion, but these technologies either face high cost investment, such as geological storage requires the construction of complex underground storage facilities, with huge initial investment and high subsequent maintenance costs; or there are potential environmental risks, such as marine storage may cause unforeseen negative impacts on the marine ecosystem; chemical conversion methods often require harsh conditions such as high temperature and high pressure as well as expensive catalysts, which greatly limits large-scale industrial applications. The singleness and high cost of this treatment method not only impose a heavy economic burden on enterprises in waste gas treatment, but also seriously restrict the realization of carbon dioxide emission reduction targets, thereby exacerbating the risk of global climate change and posing a serious threat to ecological balance and the sustainable development of human society.

[0004] At the same time, agriculture, as a basic industry for human survival, is in urgent need of improving production efficiency and the quality of agricultural products under the pressure of population growth and rising food demand. Carbon dioxide, as a key raw material for plant photosynthesis, plays a vital role in the growth, development and yield formation of crops. However, in the natural environment, the concentration of atmospheric carbon dioxide is relatively stable and is often at a level that limits the efficient photosynthesis of plants. Especially in field planting environments, crops cannot significantly improve their photosynthetic efficiency by supplementing additional carbon dioxide as in greenhouses.

[0005] In the existing agricultural production model, water and fertilizer management are mostly in a relatively separated state. Traditional fertilization methods often use methods such as broadcasting and strip application. The utilization rate of fertilizers is low, and a large amount of nutrients are easily lost with rainwater erosion or soil infiltration, which not only causes waste of resources, but also may cause environmental pollution problems such as eutrophication of water bodies. In terms of irrigation, the lack of precise water regulation often leads to serious waste of water resources, and it is impossible to provide suitable water conditions according to the real-time needs of crops. In addition, although carbon dioxide fertilization technology has been tried in greenhouse cultivation, due to the relatively closed space of the greenhouse, the application amount and application range of carbon dioxide are greatly limited, and it is difficult to promote and apply it in the vast planting areas of the field, and it is impossible to meet the huge potential demand of field crops for carbon dioxide, which seriously hinders the full exploration of agricultural production potential and the process of sustainable development.

[0006] Therefore, developing an innovative, economical, efficient and environmentally friendly technical means to utilize industrial carbon dioxide waste gas as a resource and deeply integrate it into the agricultural production system, especially with the help of advanced water-fertilizer integration technology, to achieve the extensive and efficient application of carbon dioxide in field crop planting, has become a key issue that needs to be urgently addressed in the current industrial and agricultural fields. This will not only help resolve the problem of industrial carbon dioxide emissions and reduce the cost of emission reduction for enterprises, but also open up new ways to increase production and efficiency for agricultural production, and promote the development of agriculture in a green, intelligent and sustainable direction, which is of immeasurable importance and urgency for achieving global ecological environment improvement and food security. Summary of the invention

[0007] The purpose of the present invention is to provide an application of carbon dioxide in agricultural water-fertilizer integration. The present invention, through unique system design and process flow, efficiently converts industrial carbon dioxide waste gas and applies it to field crop planting, achieves the dual goals of energy conservation and emission reduction and agricultural production increase, and expands the application scope and prospects of carbon dioxide in the agricultural field; the present invention effectively converts a large amount of carbon dioxide waste gas generated in industrial production into useful resources in agricultural production, reduces the direct emission of carbon dioxide to the atmospheric environment, reduces the greenhouse gas effect, and provides an economically feasible waste gas treatment solution for industrial enterprises, has significant environmental and social benefits, and helps to promote the coordinated and sustainable development of industry and agriculture; by continuously supplying an appropriate amount of carbon dioxide to the soil around the roots of field crops, sufficient carbon source is provided for crop photosynthesis, the photosynthesis efficiency of crops is promoted, and the accumulation of photosynthetic products is increased, thereby significantly improving the yield and quality of crops, such as improving the fullness of grains of grain crops, increasing the sweetness of fruits and the vitamin C content, etc. At the same time, the application of carbon dioxide also has insecticidal and bactericidal effects, which can reduce the occurrence of crop diseases and pests, reduce the use of pesticides, further ensure the quality and safety of agricultural products and the health of the ecological environment, and improve the economic benefits and market competitiveness of agricultural production; it breaks the limitation that carbon dioxide is only used in small quantities in greenhouse cultivation, and innovatively applies it to the field of field crop cultivation. By combining it with advanced water-fertilizer integration technology, it has realized the large-scale and normalized application of carbon dioxide in agricultural production, opening up new paths and space for the development of agricultural modernization, and has broad market application prospects and promotion value.

[0008] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: an application of carbon dioxide in agricultural water-fertilizer integration, wherein the agricultural water-fertilizer integration application includes the following key steps and components:

[0009] (1) Carbon dioxide collection and pretreatment system: A carbon dioxide collection device is installed near the industrial carbon dioxide emission source, and a high-efficiency adsorbent or absorbent is used to enrich and separate the carbon dioxide in the exhaust gas, remove impurities therein, and make the carbon dioxide purity meet the set requirements, providing high-quality raw gas for subsequent conversion and application;

[0010] (2) Gas conversion and high-pressure dissolution system: The collected and pre-treated carbon dioxide gas is transported to a specially designed high-pressure reaction tank, which is connected to the water-fertilizer integrated system. At the same time, an appropriate amount of water is injected into the reaction tank through the water supply pipeline of the water-fertilizer integrated system. By utilizing the property that carbon dioxide is soluble in water, the carbon dioxide gas is efficiently converted into a carbonate solution under the set temperature and pressure conditions, realizing the gas-to-liquid conversion process and improving the stability and storage of carbon dioxide.

[0011] In the high-pressure reaction tank, an efficient stirring device and a gas distributor are equipped to ensure that the carbon dioxide gas is fully in contact and mixed with water, accelerate the dissolution process, and make the concentration of carbon dioxide in the solution reach the set range, thus forming a liquid fertilizer semi-finished product rich in carbon dioxide;

[0012] (3) Integrated water and fertilizer delivery and application system: The semi-finished carbon dioxide liquid fertilizer after high-pressure dissolution treatment is transported to the fields through the pipeline network of the integrated water and fertilizer system, and mixed with conventional liquid fertilizer according to a set ratio to form the final carbon dioxide-enhanced liquid fertilizer to meet the nutrient and carbon dioxide needs of different crops at different growth stages;

[0013] Using advanced drip irrigation technology, the prepared carbon dioxide-enhanced liquid fertilizer is evenly and accurately applied to the soil around the roots of field crops, ensuring that the fertilizer and carbon dioxide can be efficiently absorbed and utilized by the crop roots; the drip irrigation system is equipped with an intelligent control device that can adjust the drip irrigation flow and frequency in real time according to factors such as soil moisture, crop growth stage, and meteorological conditions, thereby achieving accurate supply and intelligent management of water and fertilizer, improving fertilizer utilization and water resource utilization efficiency, and reducing environmental pollution risks.

[0014] Furthermore, in step (1), the purity of carbon dioxide is 90% to 95%.

[0015] Furthermore, the adsorbent used for collecting and pre-treating carbon dioxide in step (1) is one or more of monoethanolamine and diethanolamine.

[0016] Furthermore, the impurity removal scope in the carbon dioxide collection and pretreatment in step (1) includes dust particles, sulfides, nitrogen oxides and moisture.

[0017] Furthermore, the material of the high-pressure reaction tank in the gas conversion and high-pressure dissolution in step (2) is one of stainless steel and titanium alloy.

[0018] Furthermore, the reaction temperature in the gas conversion and high-pressure dissolution in step (2) is 20° C. to 30° C., and the pressure range is 3 MPa to 6 MPa.

[0019] Furthermore, the target concentration range of carbon dioxide in the solution in the gas conversion and high-pressure dissolution in step (2) is 0.3 mol / L to 0.8 mol / L.

[0020] Furthermore, the dripper spacing of the drip irrigation system in the integrated water and fertilizer delivery and application system in step (3) is 30-40 cm, and the drip irrigation flow rate range is 1-3 liters / hour.

[0021] The beneficial effects achieved by the present invention using the above structure are as follows: (1) The present invention effectively converts a large amount of carbon dioxide waste gas generated in industrial production into useful resources in agricultural production, reduces the direct emission of carbon dioxide to the atmospheric environment, reduces the greenhouse gas effect, and provides an economically feasible waste gas treatment solution for industrial enterprises. It has significant environmental and social benefits and helps to promote the coordinated and sustainable development of industry and agriculture; (2) The present invention continuously supplies an appropriate amount of carbon dioxide to the soil around the roots of field crops, provides sufficient carbon source for crop photosynthesis, promotes the photosynthesis efficiency of crops, and increases the accumulation of photosynthetic products, thereby significantly improving the yield and quality of crops; (3) The present invention breaks the limitation that carbon dioxide is only used in small amounts in greenhouse cultivation, and innovatively applies it to the field of field crop cultivation. By combining it with advanced water-fertilizer integration technology, it realizes the large-scale and normalized application of carbon dioxide in agricultural production, opening up new paths and space for the modernization of agriculture, and has broad market application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Average corn yield.

[0023] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] Unless otherwise defined, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described herein may be applied to the present invention. The preferred implementation methods and materials described herein are for demonstration purposes only and are not intended to limit the content of this application.

[0026] The experimental methods in the following examples are conventional methods unless otherwise specified; the experimental materials and test strains used in the following examples are purchased from commercial channels unless otherwise specified.

[0027] Example 1

[0028] Application of carbon dioxide in agricultural water-fertilizer integration

[0029] The agricultural water-fertilizer integration application includes the following key steps and components:

[0030] (1) Carbon dioxide collection and pretreatment system: A carbon dioxide collection device is installed near the industrial carbon dioxide emission source, and monoethanolamine is used to enrich and separate the carbon dioxide in the exhaust gas, remove dust particles, sulfides, nitrogen oxides and moisture, and make the carbon dioxide purity reach 90%, providing high-quality raw gas for subsequent conversion and application;

[0031] (2) Gas conversion and high-pressure dissolution system: The collected and pre-treated carbon dioxide gas is transported to a titanium alloy high-pressure reactor, which is connected to the water-fertilizer integrated system. At the same time, an appropriate amount of water is injected into the reactor through the water supply pipeline of the water-fertilizer integrated system. By utilizing the property of carbon dioxide being soluble in water, the carbon dioxide gas is efficiently converted into a carbonate solution at 30°C and 3MPa, realizing the gas-to-liquid conversion process and improving the stability and storage of carbon dioxide.

[0032] In the high-pressure reaction tank, an efficient stirring device and a gas distributor are equipped to ensure that the carbon dioxide gas is fully in contact and mixed with water, accelerate the dissolution process, and make the concentration of carbon dioxide in the solution reach 0.3mol / L~0.8mol / L, forming a liquid fertilizer semi-finished product rich in carbon dioxide;

[0033] (3) Integrated water and fertilizer delivery and application system: The semi-finished carbon dioxide liquid fertilizer after high-pressure dissolution treatment is transported to the fields through the pipeline network of the integrated water and fertilizer system, and mixed with conventional liquid fertilizer according to a set ratio to form the final carbon dioxide-enhanced liquid fertilizer to meet the nutrient and carbon dioxide needs of different crops at different growth stages;

[0034] Using advanced drip irrigation technology, the prepared carbon dioxide-enhanced liquid fertilizer is evenly and accurately applied to the soil around the roots of field crops, ensuring that the fertilizer and carbon dioxide can be efficiently absorbed and utilized by the crop roots; the drip irrigation system is equipped with an intelligent control device, which can adjust the drip irrigation flow and frequency in real time according to factors such as soil moisture, crop growth stage, and meteorological conditions. The dripper spacing is 30-40 cm, and the drip irrigation flow range is 1-3 liters / hour, achieving precise supply and intelligent management of water and fertilizer, improving fertilizer utilization and water resource utilization efficiency, while reducing environmental pollution risks.

[0035] Example 2

[0036] Application of carbon dioxide in agricultural water-fertilizer integration

[0037] The agricultural water-fertilizer integration application includes the following key steps and components:

[0038] (1) Carbon dioxide collection and pretreatment system: A carbon dioxide collection device is installed near the industrial carbon dioxide emission source, and monoethanolamine is used to enrich and separate the carbon dioxide in the exhaust gas, remove dust particles, sulfides, nitrogen oxides and moisture, and make the carbon dioxide purity reach 92%, providing high-quality raw gas for subsequent conversion and application;

[0039] (2) Gas conversion and high-pressure dissolution system: The collected and pre-treated carbon dioxide gas is transported to a titanium alloy high-pressure reactor, which is connected to the water-fertilizer integrated system. At the same time, an appropriate amount of water is injected into the reactor through the water supply pipeline of the water-fertilizer integrated system. By utilizing the property of carbon dioxide being soluble in water, the carbon dioxide gas is efficiently converted into a carbonate solution at 25°C and 4MPa, realizing the gas-to-liquid conversion process and improving the stability and storage of carbon dioxide.

[0040] In the high-pressure reaction tank, an efficient stirring device and a gas distributor are equipped to ensure that the carbon dioxide gas is fully in contact and mixed with water, accelerate the dissolution process, and make the concentration of carbon dioxide in the solution reach 0.3mol / L~0.8mol / L, forming a liquid fertilizer semi-finished product rich in carbon dioxide;

[0041] (3) Integrated water and fertilizer delivery and application system: The semi-finished carbon dioxide liquid fertilizer after high-pressure dissolution treatment is transported to the fields through the pipeline network of the integrated water and fertilizer system, and mixed with conventional liquid fertilizer according to a set ratio to form the final carbon dioxide-enhanced liquid fertilizer to meet the nutrient and carbon dioxide needs of different crops at different growth stages;

[0042] Using advanced drip irrigation technology, the prepared carbon dioxide-enhanced liquid fertilizer is evenly and accurately applied to the soil around the roots of field crops, ensuring that the fertilizer and carbon dioxide can be efficiently absorbed and utilized by the crop roots; the drip irrigation system is equipped with an intelligent control device, which can adjust the drip irrigation flow and frequency in real time according to factors such as soil moisture, crop growth stage, and meteorological conditions. The dripper spacing is 30-40 cm, and the drip irrigation flow range is 1-3 liters / hour, achieving precise supply and intelligent management of water and fertilizer, improving fertilizer utilization and water resource utilization efficiency, while reducing environmental pollution risks.

[0043] Example 3

[0044] Application of carbon dioxide in agricultural water-fertilizer integration

[0045] The agricultural water-fertilizer integration application includes the following key steps and components:

[0046] (1) Carbon dioxide collection and pretreatment system: A carbon dioxide collection device is installed near the industrial carbon dioxide emission source, and monoethanolamine is used to enrich and separate the carbon dioxide in the exhaust gas, remove dust particles, sulfides, nitrogen oxides and moisture, and make the carbon dioxide purity reach 95%, providing high-quality raw gas for subsequent conversion and application;

[0047] (2) Gas conversion and high-pressure dissolution system: The collected and pre-treated carbon dioxide gas is transported to a titanium alloy high-pressure reactor, which is connected to the water-fertilizer integrated system. At the same time, an appropriate amount of water is injected into the reactor through the water supply pipeline of the water-fertilizer integrated system. By utilizing the property of carbon dioxide being soluble in water, the carbon dioxide gas is efficiently converted into a carbonate solution at 30°C and 6MPa, realizing the gas-to-liquid conversion process and improving the stability and storage of carbon dioxide.

[0048] In the high-pressure reaction tank, an efficient stirring device and a gas distributor are equipped to ensure that the carbon dioxide gas is fully in contact and mixed with water, accelerate the dissolution process, and make the concentration of carbon dioxide in the solution reach 0.3mol / L~0.8mol / L, forming a liquid fertilizer semi-finished product rich in carbon dioxide;

[0049] (3) Integrated water and fertilizer delivery and application system: The semi-finished carbon dioxide liquid fertilizer after high-pressure dissolution treatment is transported to the fields through the pipeline network of the integrated water and fertilizer system, and mixed with conventional liquid fertilizer according to a set ratio to form the final carbon dioxide-enhanced liquid fertilizer to meet the nutrient and carbon dioxide needs of different crops at different growth stages;

[0050] Using advanced drip irrigation technology, the prepared carbon dioxide-enhanced liquid fertilizer is evenly and accurately applied to the soil around the roots of field crops, ensuring that the fertilizer and carbon dioxide can be efficiently absorbed and utilized by the crop roots; the drip irrigation system is equipped with an intelligent control device, which can adjust the drip irrigation flow and frequency in real time according to factors such as soil moisture, crop growth stage, and meteorological conditions. The dripper spacing is 30-40 cm, and the drip irrigation flow range is 1-3 liters / hour, achieving precise supply and intelligent management of water and fertilizer, improving fertilizer utilization and water resource utilization efficiency, while reducing environmental pollution risks.

[0051] Experimental Example 1

[0052] Effect of carbon dioxide on corn yield in agricultural water-fertilizer integrated device

[0053] The experimental field was selected in a plot with flat terrain, uniform soil fertility and good drainage and irrigation conditions. The soil was deeply plowed and raked before sowing, and the initial physical and chemical properties of the soil, such as soil organic matter content, total nitrogen, available phosphorus, available potassium, pH value, etc., were measured; corn was sown according to the local appropriate sowing time and sowing amount, and irrigation was carried out in time after sowing to ensure the moisture required for seed germination and seedling emergence; during the growth of corn, according to the method of Example 1-3, the intelligent control device of the water-fertilizer integrated system was used to adjust the drip irrigation flow and frequency in real time according to the data feedback from the soil sensor and the meteorological station to keep the soil moisture within an appropriate range, and the yield of each group was counted during the harvest period of corn.

[0054] Result analysis: Figure 1 The corn yields of Example 1 to Example 3 groups were all at a high level, among which the corn yield of Example 1 group was the highest, followed by Example 2 group and Example 3 group.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0056] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. An application of carbon dioxide in agricultural water-fertilizer integration, characterized by: The agricultural water-fertilizer integration application includes the following steps and components: (1) Carbon dioxide collection and pretreatment system: A carbon dioxide collection device is installed near the industrial carbon dioxide emission source, and a high-efficiency adsorbent or absorbent is used to enrich and separate the carbon dioxide in the exhaust gas, remove impurities therein, and make the carbon dioxide purity meet the set requirements, providing raw gas for subsequent conversion and application; (2) Gas conversion and high-pressure dissolution system: The collected and pre-treated carbon dioxide gas is transported to a high-pressure reaction tank, which is connected to the water-fertilizer integrated system. At the same time, an appropriate amount of water is injected into the reaction tank through the water supply pipeline of the water-fertilizer integrated system. The carbon dioxide gas is converted into a carbonate solution under set temperature and pressure conditions by utilizing the property that carbon dioxide is soluble in water. The high-pressure reaction tank is equipped with a stirring device and a gas distributor. (3) Integrated water-fertilizer delivery and application system: The semi-finished carbon dioxide liquid fertilizer that has undergone high-pressure dissolution treatment is transported to the fields through the pipeline network of the water-fertilizer integration system. Drip irrigation technology is used to apply the prepared carbon dioxide-enhanced liquid fertilizer to the soil around the roots of field crops to ensure that the fertilizer and carbon dioxide can be absorbed and utilized by the crop roots. The drip irrigation system is equipped with an intelligent control device that can adjust the drip irrigation flow and frequency in real time according to factors such as soil moisture, crop growth stage, and meteorological conditions.

2. The use of carbon dioxide in agricultural water-fertilizer integration according to claim 1, characterized in that: The purity of carbon dioxide in step (1) is 90% to 95%.

3. The use of carbon dioxide in agricultural water-fertilizer integration according to claim 2, characterized in that: The adsorbent used for collecting and pre-treating carbon dioxide in step (1) is one or more of monoethanolamine and diethanolamine.

4. The use of carbon dioxide in agricultural water-fertilizer integration according to claim 3, characterized in that: The impurities removed in the carbon dioxide collection and pretreatment in step (1) include dust particles, sulfides, nitrogen oxides and moisture.

5. The use of carbon dioxide in agricultural water-fertilizer integration according to claim 4, characterized in that: The material of the high-pressure reaction tank in the gas conversion and high-pressure dissolution in step (2) is one of stainless steel and titanium alloy.

6. The use of carbon dioxide in agricultural water-fertilizer integration according to claim 5, characterized in that: The reaction temperature in the gas conversion and high-pressure dissolution in step (2) is 20° C. to 30° C., and the pressure range is 3 MPa to 6 MPa.

7. The use of carbon dioxide in agricultural water-fertilizer integration according to claim 6, characterized in that: The target concentration range of carbon dioxide in the solution during the gas conversion and high-pressure dissolution in step (2) is 0.3 mol / L to 0.8 mol / L.

8. The use of carbon dioxide in agricultural water-fertilizer integration according to claim 7, characterized in that: The dripper spacing of the drip irrigation system in the integrated water and fertilizer delivery and application system in step (3) is 30-40 cm, and the drip irrigation flow rate range is 1-3 liters / hour.

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