Crop air fertilizer supply system and method driven by new energy

Abstract

The invention belongs to the technical field of carbon capture devices, and provides a crop gas fertilizer supply system and method driven by new energy, and the crop gas fertilizer supply system comprises new energy power generation equipment, an induced draft fan, a CO2 capture tank, a CO2 storage tank and gas fertilizer supply equipment which are connected with one another; the compressor and the CO2 concentration sensor are connected with a first server; the compressor and the gas mixing cavity are connected with a second server; the first server is used for controlling the concentration of CO2 in the CO2 storage tank by adjusting the opening degree of the induced draft fan; the second server is used for controlling the output flow of the compressor and the air inlet flow of the gas mixing cavity according to the concentration of CO2 in the CO2 storage tank and the CO2 concentration required by crops; the influence of the opening degree of the induced draft fan on the CO2 concentration in the CO2 gas storage tank and the influence of the CO2 concentration in the CO2 gas storage tank, the CO2 concentration in air and other crop gas fertilizer supply amount are considered, and the CO2 gas fertilizer with the proper concentration can be provided for crops according to different crop types.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon capture, and in particular relates to a system and method for providing crop gas fertilizer driven by new energy. Background Art

[0002] By using new energy power generation equipment to power the CO2 capture system and provide gas fertilizer for crops, the secondary pollution problem caused by traditional fossil energy power generation can be avoided and the continuous and uninterrupted operation of the system can be achieved.

[0003] At present, the carbon capture system including new energy power generation equipment, CO2 adsorption-thermal regeneration reactor, CO2 gas storage tank, greenhouse CO2 air distribution device and pipeline valve can realize the whole process from capture to gas fertilizer supply for crops. However, the system does not consider the influence of the opening of the induced draft fan on the CO2 concentration in the CO2 gas storage tank, nor the influence of the CO2 concentration in the CO2 gas storage tank and the CO2 concentration in the air on the gas fertilizer supply for crops, and cannot provide suitable gas fertilizer for crops. Moreover, the CO2 that passes through the CO2 capture system can only provide gas fertilizer for the photosynthesis of crops, and its function is single. For example, it cannot provide growth effect for the roots of crops. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a crop gas fertilizer providing system and method driven by new energy. The first server is used to control the concentration of CO2 in the CO2 storage tank by adjusting the opening of the induced draft fan; the second server is used to control the output flow of the compressor and the air inlet flow of the mixing chamber according to the concentration of CO2 in the CO2 storage tank and the CO2 concentration required by the crops; the influence of the opening of the induced draft fan on the CO2 concentration in the CO2 storage tank, as well as the influence of the CO2 concentration in the CO2 storage tank and the CO2 concentration in the air on the crop gas fertilizer supply are taken into consideration, and CO2 gas fertilizer of appropriate concentration can be provided to the crops according to different types of crops.

[0005] In order to achieve the above-mentioned purpose, in the first aspect, the present invention provides a crop gas fertilizer supply system driven by new energy, which adopts the following technical scheme:

[0006] A crop gas fertilizer supply system driven by new energy, comprising interconnected new energy power generation equipment, induced draft fan, CO2 capture tank, CO2 storage tank and gas fertilizer supply equipment;

[0007] A compressor and a gas mixing chamber are arranged between the CO2 storage tank and the gas fertilizer providing device; a CO2 concentration sensor is arranged at the CO2 storage tank, and the compressor and the CO2 concentration sensor are connected to a first server; the compressor and the gas mixing chamber are connected to a second server; the first server is connected to the second server;

[0008] The first server is used to control the concentration of CO2 in the CO2 storage tank by adjusting the opening of the induced draft fan; the second server is used to control the output flow of the compressor and the air inlet flow of the mixing chamber according to the concentration of CO2 in the CO2 storage tank and the CO2 concentration required by crops.

[0009] Furthermore, the new energy power generation equipment includes a wind turbine power generation equipment and a solar power generation equipment, and the wind turbine power generation equipment and the solar power generation equipment are connected to a battery pack.

[0010] Furthermore, a purification chamber is provided between the induced draft fan and the CO2 capture tank.

[0011] Furthermore, the carbon capture material in the CO2 capture tank is a solid amine adsorption material.

[0012] Furthermore, an air valve is provided on the gas mixing chamber, and the air valve is connected to the second server.

[0013] Furthermore, the gas fertilizer providing device includes a leaf CO2 release mechanism and a root CO2 release mechanism.

[0014] Furthermore, the blade CO2 release mechanism includes a bracket and a nozzle arranged on the bracket, and the bracket is a telescopic rod; the root CO2 release mechanism includes an air outlet and a barb arranged near the air outlet.

[0015] In order to achieve the above-mentioned purpose, in a second aspect, the present invention also provides a method for providing crop gas fertilizer driven by new energy, which adopts the following technical scheme:

[0016] A method for providing crop gas fertilizer driven by new energy, using the crop gas fertilizer provided by the new energy driven system as described in the first aspect, comprising:

[0017] The concentration of CO2 in the CO2 storage tank is controlled by adjusting the opening of the induced draft fan; the output flow of the compressor and the air inlet flow of the mixing chamber are controlled according to the concentration of CO2 in the CO2 storage tank and the CO2 concentration required by the crops.

[0018] Furthermore, the CO2 concentration C3 in the CO2 storage tank is:

[0019]

[0020] Among them, V CO2 is the total volume of CO2 released during the desorption process; t is the adsorbent desorption time; V sp is the mass space velocity; M is the mass of the adsorbent; f(x) is the function corresponding to the CO2 desorption curve; Cti is the desorption concentration of CO2 at time ti; V1 is the total flow setting of the induced draft fan; X is the opening degree.

[0021] Furthermore, the algorithm for adjusting the compressor output flow and the air pump output flow is:

[0022] C3×V3+C4×V4=C5×V5

[0023] Among them, C3 is the CO2 concentration in the CO2 storage tank; V3 is the compressor flow; C4 is the CO2 concentration in the air; V4 is the air pump flow; C5 is the CO2 concentration after gas distribution; V5 is the flow after gas distribution.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] In the present invention, a first server is connected to the compressor and the CO2 concentration sensor; a second server is connected to the compressor and the mixing chamber; the first server is used to control the concentration of CO2 in the CO2 storage tank by adjusting the opening of the induced draft fan; the second server is used to control the output flow of the compressor and the air inlet flow of the mixing chamber according to the concentration of CO2 in the CO2 storage tank and the CO2 concentration required by the crops; the influence of the opening of the induced draft fan on the CO2 concentration in the CO2 storage tank, as well as the influence of the CO2 concentration in the CO2 storage tank and the CO2 concentration in the air on the gas fertilizer supply to the crops are taken into consideration, and CO2 gas fertilizer of appropriate concentration can be provided to the crops according to different types of crops.

[0026] The gas fertilizer providing device of the present invention comprises a leaf CO2 release mechanism and a root CO2 release mechanism, wherein the leaf CO2 release mechanism comprises a bracket and a nozzle arranged on the bracket, and the bracket is a telescopic rod, which can be flexibly adjusted according to the growth of crops; the root CO2 release mechanism comprises an air outlet and barbs arranged near the air outlet, and the barbs can ensure that the air outlet is not blocked by soil, and can dredge the soil at the roots of plants through CO2, thereby increasing air permeability, increasing the inorganic carbon source of the soil, and improving the organic matter content. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0028] Figure 1 This is a schematic diagram of the system structure of Embodiment 1 of the present invention;

[0029] Figure 2 This is a schematic diagram of a CO2 capture tank according to Example 1 of the present invention;

[0030] Figure 3Schematic diagram of the gas mixing chamber of Example 1 of the present invention;

[0031] Figure 4 Providing equipment for the gas fertilizer of Example 1 of the present invention;

[0032] Figure 5 The blade CO2 release mechanism of embodiment 1 of the present invention;

[0033] Figure 6 The root CO release mechanism of Example 1 of the present invention;

[0034] Figure 7 This is the 30% TEPA / X-5 solid amine adsorption curve under the influence of CO2 concentration in Example 1 of the present invention;

[0035] Figure 8 This is the 30% TEPA / X-5 solid amine adsorption curve under the influence of adsorption temperature in Example 1 of the present invention;

[0036] Fig. 9 This is the desorption curve of 30% TEPA / X-5 solid amine under dry conditions in Example 1 of the present invention;

[0037] Fig.10 is the desorption curve of 30% TEPA / X-5 solid amine at 100% relative humidity in Example 1 of the present invention;

[0038] Fig.11 The 30% TEPA / X-5 solid amine direct air capture CO2 cycle performance of Example 1 of the present invention;

[0039] Fig.12 This is a flow chart of CO2 adsorption and desorption in Example 1 of the present invention;

[0040] Fig.13 A process flow chart is provided for the gas fertilizer of Example 1 of the present invention;

[0041] Among them, 1. New energy power generation equipment; 101. Wind turbine power generation equipment; 102. Solar power generation equipment; 2. Battery pack; 3. induced draft fan; 4. Purification chamber; 5. CO2 capture tank; 501. Graphite positive electrode; 502. Graphite negative electrode; 503. Foam nickel gasket; 6. First server; 7. Control valve; 8. Venting direction air duct; 9. Check valve; 10. CO2 storage tank; 11. Compressor; 12. Mixing chamber; 1201. Shell; 1202. Rotating blades; 13. Gas fertilizer supply equipment; 1301. Blade CO2 release mechanism; 13011. Bracket; 13012. Blower; 13013. Nozzle; 1302. Root CO2 release mechanism; 13021. Air outlet; 13022. Barb; 14. Air valve; 15. Second server. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0044] Embodiment 1:

[0045] like Figure 1 and Figure 2 As shown, this embodiment provides a crop gas fertilizer supply system driven by new energy, including a new energy power generation device 1, a battery pack 2, an induced draft fan 3, a purification chamber 4, a CO2 capture tank 5, a first server 6, a control valve 7, a venting direction air duct 8, a check valve 9, a CO2 storage tank 10, a compressor 11, a gas mixing chamber 12, a gas fertilizer supply device 13, an air valve 14, and a second server 15. The new energy power generation device 1 includes a wind turbine power generation device 101 and a solar power generation device 102. The CO2 capture tank 5 is provided with a graphite positive electrode 501, a graphite negative electrode 502 and a nickel foam gasket 503. The gas mixing chamber 12 includes a shell 1201 and a rotating blade 1202 arranged in the shell 1201. The gas fertilizer providing device 13 includes a blade CO2 release mechanism 1301 and a root CO2 release mechanism 1302 ; the blade CO2 release mechanism 1301 includes a bracket 13011 , a blower 13012 and a nozzle 13013 ; the root CO2 release mechanism 1302 includes an air outlet 13021 and a barb 13022 .

[0046] In this embodiment, in the CO2 adsorption step, when the detector in the CO2 storage tank 10 detects that the CO2 concentration C reaches the set starting adsorption threshold, the control system of the first server 6 issues an adsorption instruction, controls the control valve 7 to open the venting direction air duct 8, and closes the CO2 storage tank direction air duct. The induced draft fan 3 is adjusted to a large air volume, and impurities such as dust and moisture in the air are removed through the purification chamber 4. The CO2 concentration and temperature are collected by the first detector respectively, and the detected data are uploaded to the first server 6. Then, the cleaned air enters the CO2 capture tank 5 through the air duct. After the CO2 in the air is captured by the capture material in the CO2 capture tank 5, the air is emptied through the control valve of the air duct. The exhausted air is tested for CO2 concentration by the second detector and fed back to the first server 6. When the CO2 concentration data collected by the first detector and the second detector reach the set range (such as not more than 50ppm), the first server 6 issues a stop instruction, the induced draft fan 3 stops running, and the control valve 7 is in a closed state. During the CO2 adsorption process, the first server 6 issues an instruction: the heating wire and / or the electrode in the air duct and the CO2 capture tank 5 are not energized and are in a closed state.

[0047] In the CO2 desorption step, when the detector in the CO2 storage tank detects that the CO2 concentration C reaches the set starting adsorption threshold, the first server 6 determines that the CO2 adsorption program has been completed and starts the CO2 desorption program. The first server 6 issues an instruction: the control valve 7 closes the air duct 8 in the venting direction and opens the air duct in the direction of the CO2 storage tank. The induced draft fan 3 starts a small air volume, and at the same time turns on the electric heating in the air duct and the CO2 capture tank 5. The temperature is controlled within the range of 70-100°C through the temperature detector, or the positive and negative electrodes are powered, with a current range of 1-10A. The desorption of CO2 is achieved by heating and self-heating of the adsorption material, and enters the CO2 storage tank 10 with the air flow.

[0048] It is particularly important to note that the opening of the induced draft fan 3 needs to be regulated according to the CO2 concentration in the CO2 storage tank 10, and the flow rate of the induced draft fan 3 matches the CO2 concentration in the storage tank. Specific control content:

[0049] Optionally, the desorption time t and mass space velocity V of each solid amine adsorbent are obtained by experiment. sp And the adsorbent mass M. Then the total volume of CO2 released during the desorption process is

[0050]

[0051] Where f(x) is the function corresponding to the CO2 desorption curve; C ti is the desorption concentration of CO2 at time ti, ppm.

[0052] The total flow of the induced draft fan 3 is set to V1, and the opening is set to X. Then the relationship between the opening of the induced draft fan and the CO2 concentration C3 of the CO2 storage tank 10 is:

[0053]

[0054] Optionally, the carbon capture material is a solid amine adsorption material, which is mainly prepared by an impregnation method and mainly consists of two parts: a carrier and an organic amine. The carrier is a porous material with macropores or mesopores, such as MCM-41, SBA-15, Al2O3, carbon nanotubes, carbon aerogel, mesoporous carbon and porous resin; the organic amine includes polyamines such as polyethyleneimine (PEI), polypropyleneamine (PAA), and tetraethylenepentamine (TEPA).

[0055] Electrothermal desorption takes advantage of the good electrical and thermal conductivity of the adsorbent, and accelerates CO2 desorption by directly passing electricity across the two ends of the adsorbent or by electromagnetically inducing Joule heat. The carrier of the solid amine adsorbent material suitable for electrothermal desorption adsorbent mainly refers to carbon-based materials doped with metal elements (carbon gel, carbon fiber), and the doped metals are zirconium, cerium, and copper, and the element content ranges from 0.1% to 2%wt.

[0056] The CO2 supply system for field crops mainly passes the highly concentrated (1.5%-2.0%) CO2 in the CO2 storage tank through a compressor and then mixes it with the air provided by the air pump in a mixing chamber (with rotating blades), diluting the CO2 concentration to the concentration required for plant growth. It is then supplied to the leaves of crops through a pipeline system as gas fertilizer. Supplying it to the roots can, on the one hand, keep the soil breathable, and on the other hand, it can be dissolved in the soil aqueous solution to provide an inorganic carbon source for microorganisms, thereby increasing the organic matter content of the soil.

[0057] The specific workflow is as follows: when the CO2 detector detects the CO2 concentration near the plant leaf surface, it is uploaded to the second server. The second server judges to start the CO2 supply system according to the set threshold, starts the compressor and the air pump, adjusts the compressor output flow and the air pump output flow, and after the gas mixing chamber is fully mixed, the CO2 concentration in the output gas meets the optimal concentration range for plants. In the delivery pipeline, the delivery pressure is adjusted according to the delivery distance to ensure that the delivery gas pressure is 0.4-1.0MPa.

[0058] To adjust the compressor output flow and the air pump output flow, the adjustment algorithm used is:

[0059] C3×V3+C4×V4=C5×V5

[0060] Where C3 is the CO2 concentration in the CO2 storage tank, ppm; V3 is the compressor flow, m 3 / h; C4 is the CO2 concentration in the air, ppm; V4 is the air pump flow, m3 / h; C5 is the CO2 concentration after gas distribution, ppm; V5 is the flow rate after gas distribution, m 3 / h. The optimal CO2 concentration required by different plant types is shown in Table 1

[0061] Table 1 Optimal CO2 concentration required by different plant types

[0062]

[0063]

[0064] The optimal CO2 concentration range for common plants is usually between 300 and 1000 ppm (parts per million). Different plants react differently to CO2 concentrations, and the specific values ​​vary depending on the plant species and growth environment. The following are the optimal CO2 concentration ranges for some common plants:

[0065] Greenhouse plants (such as tomatoes, cucumbers, etc.): about 800-1000ppm. In greenhouse conditions, increasing CO2 concentration can promote photosynthesis, thereby increasing plant growth rate and yield.

[0066] Crops (such as wheat, corn, and rice): about 350-700ppm. When the CO2 concentration is moderate, the photosynthesis efficiency of crops is high, and the effect is not significantly improved after exceeding 700ppm.

[0067] Corn, sorghum, sugarcane, etc.: about 300-600ppm. Plants such as soybeans, cotton, and spinach are relatively less dependent on high CO2 concentrations because their photosynthesis pathways are more efficient, but moderate increases in CO2 will still promote their growth.

[0068] Such as soybeans, cotton, spinach, etc.: about 400-800ppm. Plants such as soybeans, cotton, spinach, etc. show stronger photosynthesis and growth response under higher CO2 concentrations.

[0069] In general, the optimal CO2 concentration for most plants is usually increased from the natural atmospheric concentration (about 400ppm) to 600-1000ppm, which can effectively promote photosynthesis, especially in a controlled environment such as a greenhouse.

[0070] The CO2 release mechanism for the leaves is a retractable bracket with a nozzle. The outlet of CO2 on the bracket is a nozzle with adjustable direction. The principle of automatic adjustment of the nozzle up and down is the airflow recoil principle. This set of devices can ensure that most of the plant leaves can be contained in the CO2 release space. The main function is to provide gas fertilizer for the leaves.

[0071] The root CO2 release mechanism that is delivered to the roots of underground plants is a barbed structure with air holes under the barbs to ensure that the air holes are not blocked by the soil. The barb angle is <30°, the size of the air holes is 0.1-0.2cm, the interval is 8-12cm, and the depth of the ground is 30-50cm from the roots of the plants. Main functions: dredge the soil at the roots of plants and increase air permeability; increase the inorganic carbon source in the soil and improve the organic matter content.

[0072] like Figure 7 to Figure 11 As shown, optionally, a solid amine adsorbent is prepared by wet impregnation method. The specific preparation process is as follows: weigh 0.45g of TEPA and add it to 5mL of anhydrous methanol. The two are fully mixed by magnetic stirring in a water bath at 40°C for 30min until TEPA is completely dissolved. Subsequently, 1g of carrier X-5 macroporous resin is added to the mixed solution, and stirring is continued at 40°C for 8h. During the stirring process, the container is sealed to prevent the amine from being oxidized by contact with air. After stirring, the mixture is placed in a vacuum drying oven at 60°C and dried overnight. After the anhydrous methanol in the mixture is completely evaporated, a solid amine adsorbent 30% TEPA / X-5 is obtained.

[0073] Embodiment 2:

[0074] This embodiment provides a method for providing crop gas fertilizer driven by new energy, using the crop gas fertilizer provided by new energy as described in Example 1, including:

[0075] The concentration of CO2 in the CO2 storage tank is controlled by adjusting the opening of the induced draft fan; the output flow of the compressor and the air inlet flow of the mixing chamber are controlled according to the concentration of CO2 in the CO2 storage tank and the CO2 concentration required by the crops.

[0076] Optionally, the CO2 concentration C3 in the CO2 storage tank is:

[0077]

[0078] Among them, V CO2 is the total volume of CO2 released during the desorption process; t is the adsorbent desorption time; V sp is the mass space velocity; M is the mass of the adsorbent; f(x) is the function corresponding to the CO2 desorption curve; C ti is the desorption concentration of CO2 at time ti; V1 is the total flow setting of the induced draft fan; X is the opening degree.

[0079] Optionally, the algorithm for adjusting the compressor output flow and the air pump output flow is:

[0080] C3×V3+C4×V4=C5×V5

[0081] Among them, C3 is the CO2 concentration in the CO2 storage tank; V3 is the compressor flow; C4 is the CO2 concentration in the air; V4 is the air pump flow; C5 is the CO2 concentration after gas distribution; V5 is the flow after gas distribution.

[0082] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A crop gas fertilizer supply system driven by new energy, characterized in that: Including interconnected new energy power generation equipment, induced draft fans, CO2 capture tanks, CO2 storage tanks and gas fertilizer supply equipment; A compressor and a gas mixing chamber are arranged between the CO2 storage tank and the gas fertilizer providing device; a CO2 concentration sensor is arranged at the CO2 storage tank, and the compressor and the CO2 concentration sensor are connected to a first server; the compressor and the gas mixing chamber are connected to a second server; the first server is connected to the second server; The first server is used to control the concentration of CO2 in the CO2 storage tank by adjusting the opening of the induced draft fan; the second server is used to control the output flow of the compressor and the air inlet flow of the mixing chamber according to the concentration of CO2 in the CO2 storage tank and the CO2 concentration required by crops.

2. A crop gas fertilizer supply system driven by new energy as claimed in claim 1, characterized in that: The new energy power generation equipment includes a wind turbine power generation equipment and a solar power generation equipment, and the wind turbine power generation equipment and the solar power generation equipment are connected to a battery pack.

3. The crop gas fertilizer supply system driven by new energy as claimed in claim 1, characterized in that: A purification chamber is provided between the induced draft fan and the CO2 capture tank.

4. The crop gas fertilizer supply system driven by new energy as claimed in claim 1, characterized in that: The carbon capture material in the CO2 capture tank is a solid amine adsorption material.

5. The crop gas fertilizer supply system driven by new energy as claimed in claim 1, characterized in that: The air mixing chamber is provided with an air valve, and the air valve is connected to the second server.

6. The crop gas fertilizer supply system driven by new energy as claimed in claim 1, characterized in that: The gas fertilizer providing device comprises a leaf CO2 releasing mechanism and a root CO2 releasing mechanism.

7. A crop gas fertilizer supply system driven by new energy as claimed in claim 6, characterized in that: The blade CO2 release mechanism includes a bracket and a nozzle arranged on the bracket, and the bracket is a telescopic rod; the root CO2 release mechanism includes an air outlet and a barb arranged near the air outlet.

8. A method for providing crop gas fertilizer driven by new energy, characterized in that: The crop gas fertilizer supply system driven by new energy as claimed in any one of claims 1 to 7 is used, comprising: The concentration of CO2 in the CO2 storage tank is controlled by adjusting the opening of the induced draft fan; the output flow of the compressor and the air inlet flow of the mixing chamber are controlled according to the concentration of CO2 in the CO2 storage tank and the CO2 concentration required by the crops.

9. A method for providing crop gas fertilizer driven by new energy as claimed in claim 8, characterized in that: The CO2 concentration C3 in the CO2 storage tank is: Among them, V CO2 is the total volume of CO2 released during the desorption process; t is the adsorbent desorption time; V sp is the mass space velocity; M is the mass of the adsorbent; f(x) is the function corresponding to the CO2 desorption curve; C ti is the desorption concentration of CO2 at time ti; V1 is the total flow setting of the induced draft fan; X is the opening degree.

10. A method for providing crop gas fertilizer driven by new energy as claimed in claim 9, characterized in that: The algorithm for adjusting the compressor output flow and the air pump output flow is: C3×V3+C4×V4=C5×V5 Among them, C3 is the CO2 concentration in the CO2 storage tank; V3 is the compressor flow; C4 is the CO2 concentration in the air; V4 is the air pump flow; C5 is the CO2 concentration after gas distribution; V5 is the flow after gas distribution.

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