Method for producing enhanced foliar fertilizer by using ocean deep water concentrated solution instead of hydrosolvent

Abstract

The invention provides a method for producing an enhanced foliar fertilizer by using a deep sea water concentrated solution instead of a hydrosolvent, the deep sea water concentrated solution is produced more efficiently and at lower cost by adopting a magnetofluid seawater desalination separation method, and the concentrated solution produced by the method, an electrodeionization method and other methods is used as a solvent. The traditional water solvent for producing foliar fertilizers and nutrient solutions is replaced, various water-soluble enhanced foliar fertilizers and plant nutrient solutions are produced on the premise of not changing the existing equipment and process, various mineral substances and trace elements can be supplemented, the absorption rate of crops to the mineral substances and the trace elements is improved, and the water-soluble enhanced foliar fertilizers and plant nutrient solutions are obtained. The disease resistance, stress resistance, immunocompetence and growth ability of plants can be enhanced, the yield and quality of crops are improved, the usage amount of chemical fertilizers and pesticides is reduced, pollution and damage to the environment are reduced, and development of deep sea resources and green functional agriculture is greatly promoted.

Description

Technical Field

[0001] The invention relates to the field of agricultural foliar fertilizer production, and in particular to a method for producing enhanced foliar fertilizer by replacing a water solvent with a deep ocean water concentrate. Background Art

[0002] At present, except for a small amount of oily foliar fertilizers, most of the foliar fertilizers produced and circulated on the market use water as a solvent. Water solvent is used to dissolve large-scale elements such as NPK, water solvent is used to dissolve medium-scale elements such as Mg and Ca, water solvent is also used to dissolve trace elements, trace elements and chelating agents, and water solvent is used to dissolve humic acid, amino acids, yeast, Bacillus subtilis and other beneficial bacteria, plant growth regulators, chitin, alginic acid, sugar acid, etc., to produce different types of water-soluble foliar fertilizers.

[0003] Foliar fertilizers and nutrient solutions for various plant growth applications are dissolved in water. Because water itself contains very few of the minerals, trace elements, and micronutrients that plants need, the production of these foliar fertilizers and nutrient solutions requires the addition of mineral elements to meet these requirements. However, some minerals are not completely soluble in water. Even if they do dissolve, the coupling and binding between the mineral elements and water molecules is not strong enough, making them difficult for plants to absorb. This, in turn, results in high costs and waste.

[0004] Deep ocean water refers specifically to seawater below -200 meters. Due to its high pressure (above 20 atmospheres), low temperature (2°C-6°C), lack of photosynthesis, and non-oxidation-reduction behavior, deep ocean water is exceptionally clean, virtually free of pathogens, chemical reactions, environmental hormones, and other pollutants. Organic matter is almost entirely broken down into inorganic nutrients, which serve as a vast reservoir of fertilizer within the deep ocean. These nutrients increase with increasing depth, reaching their highest and most stable concentrations at a depth of 1,000 meters. Deep ocean water contains over 70 essential minerals, trace elements, and micronutrients, all of which are consistently balanced, making it ideal for human and plant absorption and immune-boosting. Under the influence of intense water pressure for thousands or even hundreds of millions of years, deep ocean water's water molecules are significantly smaller than those on land. The molecular bond angles of deep ocean water closely resemble those of water and blood in the human body, making it highly accessible to humans and plants. Deep ocean water represents a vast reservoir of nutrients that has yet to be fully tapped.

[0005] Deep ocean water undergoes a series of filtration, separation, purification, and deep concentration processes to produce a concentrate. This concentrate contains at least 60 kinds of trace elements and microelements in minerals, a quantity that no other substance on Earth can match. Most of these elements exist in ionic form, in a highly concentrated hydrated ion state. After removing NaCl and CaCO3 from the deep ocean water concentrate, Mg 2+The highest content is Mg 2+ As the "beacon of life", it fully participates in the metabolism and photosynthesis of plants, activates and catalyzes more than 300 enzymes, including the utilization of glucose, the synthesis of fats, proteins and nucleic acids. 2+ There are more than 60 elements essential for plants, such as K, Sr, Fe, B, Li, Cu, Mo, Ni, Rb, V, F, Br, I, C, Si and other mineral elements.

[0006] The water molecules in deep-sea water concentrate remain small clusters. According to professional measurements, the radius of water molecules in deep-sea water concentrate is generally around 50-60 hertz, compared to 120-130 hertz on land. These small clusters are highly absorbable by plants. Deep-sea water concentrate also significantly promotes the fermentation and growth of fungi such as yeast and Bacillus subtilis. It also increases the production of amino acids and lactic acid, significantly improving the quality of specialized foliar fertilizers such as those containing fungi, humic acid, and amino acids.

[0007] Deep ocean water concentrate is typically non-oxidizing and reducing water, which can stimulate plant cell vitality. Therefore, using deep ocean water concentrate instead of ordinary water can address the limited variety and low content of minerals and trace elements in traditional foliar fertilizers, providing the necessary nutrients for plant growth. It also addresses the low absorption rate of minerals and trace elements in traditional foliar fertilizers, activating plant cell activity and improving the effectiveness of foliar fertilizers. It can also significantly improve the quality of specialized foliar fertilizers such as fungi, humic acid, and amino acids, greatly enhancing the effectiveness of traditional foliar fertilizers. It also has a functional enhancing effect on plant growth nutrient solutions. Summary of the Invention

[0008] In view of this, the present invention proposes a method for producing enhanced foliar fertilizers by replacing water solvents with deep ocean water concentrates, and adopts the following solutions to solve the above problems: first, the deep ocean water concentrates are produced and extracted at low cost and high efficiency, providing possibilities and channels for large-scale development and utilization of deep ocean water; second, for all water-soluble foliar fertilizers and plant growth nutrient solutions, deep ocean water concentrates are used to replace water solvents, without changing the equipment configuration and process flow, and traditional methods and processes are still used to produce enhanced foliar fertilizers and enhanced plant growth nutrient solutions with different functions but rich in multiple minerals and trace elements.

[0009] The technical solution of the present invention is achieved as follows: a method for producing enhanced foliar fertilizer by using deep ocean water concentrate instead of water solvent, comprising the following steps:

[0010] (1) Extraction of deep ocean water concentrate: deep ocean water is purified by physical separation process to obtain a concentrate containing ≥60 kinds of minerals, trace elements and microelements, wherein the radius of water molecules in the concentrate is 50-60 Hz and the total dissolved solids (TDS) concentration of ionic elements is ≥8000 mg / L;

[0011] (2) Substituting water solvents for the production of foliar fertilizers: The concentrated liquid is used to directly replace the traditional water solvent to produce water-soluble enhanced foliar fertilizers without changing the existing equipment and process.

[0012] Furthermore, the extraction method of the deep ocean water concentrate in step (1) is a magnetic fluid separation method, which specifically includes:

[0013] S1. Pretreatment: Deep ocean water with a water depth of ≥200m and a water temperature of 2-6°C is introduced into the PVC integrated membrane system for pretreatment, intercepting and removing organic macromolecular particles with a particle size of >0.1μm and organic matter with a molecular weight of >200Da, while retaining minerals and trace elements in ionic or small molecular states, to produce pretreated brine with a conductivity of ≤10μS / cm;

[0014] S2, magnetic fluid directional separation: pressurize the pretreated brine to 0.8-1.2 MPa, and pass it through a magnetic fluid seawater desalination separation device with a magnetic field strength of ≥1.5T in the form of a mist flow to separate NaCl and CaCO3 in a directional manner to obtain the remaining brine;

[0015] S3, low-temperature multi-effect distillation and concentration: introducing the remaining brine into a low-temperature multi-effect distillation system, performing distillation and concentration, separating fresh water, and obtaining a concentrate;

[0016] S4. Terminal disinfection: using ultraviolet rays with a wavelength of 253.7 nm to perform continuous flow disinfection on the concentrated liquid to obtain deep ocean water concentrated liquid.

[0017] Furthermore, the PVC integrated membrane system of step S1 is integrated with ultrafiltration membrane, nanofiltration membrane and reverse osmosis membrane, and the total water recovery rate is 60%-75% through three-stage membrane separation, wherein the water flux of ultrafiltration membrane is 50-100L / (m 2 ・h), the operating pressure of nanofiltration membrane is 0.5-1.0MPa, and the operating pressure of reverse osmosis membrane is 1.5-2.5MPa.

[0018] Furthermore, the ultrafiltration membrane is made of polyvinylidene fluoride (PVDF) or polyethersulfone (PES) with a pore size of 0.01-0.1 μm, which can intercept and remove suspended particles, colloids and microorganisms with a particle size greater than 0.1 μm; the nanofiltration membrane is an aromatic polyamide composite membrane with a molecular weight cutoff of 200-1000 Da; the reverse osmosis membrane is made of aromatic polyamide with a molecular weight cutoff of <200 Da and a salt rejection rate of ≥99%, which can further remove dissolved salts and organic matter with a molecular weight greater than 100 Da.

[0019] Furthermore, in step S2, the magnetic field strength of the magnetic fluid seawater desalination separation system is 1.5-2.5T. After the brine is raised to 0.8-1.2MPa by a pressure pump, it is formed into a mist flow with a droplet size of ≤50μm through an atomizing nozzle and introduced into the magnetic field separation chamber in a tangential direction.

[0020] Furthermore, in the directional separation process described in step S2, the single separation efficiency of NaCl and CaCO3 is ≥92%, and the NaCl concentration in the remaining brine is ≤500 mg / L, and the CaCO3 concentration is ≤300 mg / L.

[0021] Furthermore, the operating vacuum of the low-temperature multi-effect distillation system in step S3 is 5-30 kPa, the distillation effect number is 3-5, the evaporation temperature of each effect decreases by 5-10 ° C, the first effect temperature is ≤60 ° C, the final effect temperature is ≥30 ° C, and the feed flow rate of the residual brine is 5-10m 3 / h, the water evaporation rate reaches 85%-90%, and the concentrated solution with the total dissolved solids (TDS) concentration of ionic elements is 8000-12000 mg / L.

[0022] Furthermore, the irradiation dose of the ultraviolet disinfection process in step S3 is ≥30mJ / cm 2 , the total colony count was controlled to ≤10 CFU / mL.

[0023] Furthermore, the Mg in the concentrated solution 2+ Content ≥1500mg / L, and at least contains K + 、Sr 2+ 、Fe 3+ 、B 3+ ,I⁻,Si 4+ The concentration of these elements can be used to produce low, medium and high concentration concentrates according to needs.

[0024] Furthermore, the water-soluble enhanced foliar fertilizer in step (2) includes a water-soluble enhanced foliar fertilizer containing a large number of elements, a water-soluble enhanced foliar fertilizer containing trace elements, a water-soluble enhanced foliar fertilizer containing medium elements, a water-soluble enhanced foliar fertilizer containing amino acids, a water-soluble enhanced foliar fertilizer containing humic acid, a water-soluble enhanced foliar fertilizer containing alginic acid, an organic water-soluble enhanced foliar fertilizer, or a compound water-soluble enhanced foliar fertilizer.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] First, the present invention can extract deep ocean water concentrate in large quantities at low cost. Using magnetic fluid separation, the cost of extracting deep ocean water concentrate is over 50% lower than other methods, while the extraction efficiency is over 80% higher. This method is suitable for large-scale industrial production and provides new technical channels and possibilities for the large-scale development and utilization of deep ocean water. The deep ocean water concentrate produced by this method can be used in the healthcare industry as well as in agriculture, aquaculture, and other industries.

[0027] Secondly, it can fully supplement mineral trace elements, improve the absorption rate of mineral trace elements by plants, and improve the quality and yield of crops. The foliar fertilizer and nutrient solution produced by this method have a full range of elements and high efficiency in absorbing minerals. The yield of crops is increased by more than 20%, and the quality is also greatly improved and enhanced.

[0028] Third, it significantly expands the sources of fertilizer raw materials. The ocean is humanity's treasure trove, and deep-sea water concentrate is a precious gift from the ocean. Using this method to produce various water-soluble foliar fertilizers and nutrient solutions creates an inexhaustible resource, providing a continuous supply of high-quality ecological fertilizers and significantly promoting the development of agriculture and the marine industry.

[0029] Fourth, it significantly reduces the use of chemical fertilizers and pesticides, lowering carbon emissions. Long-term use of this enhanced foliar fertilizer and nutrient solution significantly enhances plant disease resistance, immunity, and growth, significantly reducing the use of traditional chemical fertilizers and pesticides by at least 25%, according to estimates. This significantly boosts agricultural production. Furthermore, considering the carbon footprint of the entire upstream and downstream product chain, this method is environmentally friendly, carbon-free, and carbon-reducing, significantly reducing carbon emissions and benefiting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of producing concentrated liquid by magnetic fluid separation method.

[0031] Figure 2 Schematic diagram of producing concentrated solution by electrodeionization method. DETAILED DESCRIPTION

[0032] In order to better understand the technical content of the present invention, specific examples are provided below to further illustrate the present invention.

[0033] Unless otherwise specified, the experimental methods used in the examples of the present invention are all conventional methods.

[0034] Unless otherwise specified, the materials, reagents, etc. used in the examples of the present invention can be obtained from commercial sources.

[0035] Example 1: Production of concentrated liquid by magnetic fluid separation

[0036] Process steps

[0037] S1 preprocessing:

[0038] Water source: Deep water below 200 meters in a certain sea area (water temperature 4℃-6℃, conductivity 50mS / cm);

[0039] PVC integrated membrane system:

[0040] Ultrafiltration membrane: PVDF material, pore size 0.05μm, water flux 80L / (m²・h), intercepting and removing suspended particles, colloids and microorganisms with a particle size greater than 0.1μm;

[0041] Nanofiltration membrane: aromatic polyamide composite membrane, molecular weight cut-off 500Da, operating pressure 0.8MPa, retention K + Mg 2+ , selectively retaining divalent ions (Ca 2+ Mg 2+ ) and macromolecular organic matter (humic acid);

[0042] Reverse osmosis membrane: Made of aromatic polyamide, operating pressure 2.0 MPa, desalination rate 99.5%, produced pretreated brine with conductivity 8 μS / cm and mineral concentration 1200 mg / L.

[0043] S2 Magnetic Fluid Directional Separation:

[0044] The brine is pressurized to 1 MPa, the atomized droplet size is 30 μm, and it is introduced tangentially into the magnetic field cavity through a separation device with a magnetic field strength of 2.0 T;

[0045] Separation efficiency: NaCl single separation rate 95%, CaCO3 single separation rate 93%, residual brine NaCl concentration 450mg / L, CaCO3 concentration 280mg / L

[0046] S3 low-temperature multi-effect distillation: The remaining brine is introduced into the low-temperature multi-effect distillation system, with a vacuum degree of 15kPa, 3-effect distillation, a first-effect temperature of 55°C, a final-effect temperature of 40°C, and a feed flow rate of 8m 3 / h; fresh water recovery rate is 88%, concentrate TDS concentration is 10000mg / L, I⁻ retention rate is 96%, and Br⁻ retention rate is 97%.

[0047] S4 UV disinfection

[0048] The concentrated liquid was sterilized in a continuous flow state by ultraviolet light with a wavelength of 253.7 nm and an irradiation dose of 35 mJ / cm 2 , the total colony count ≤ 10 CFU / mL, and deep ocean water concentrate was prepared.

[0049] Example 2: Electrodeionization to produce concentrated solution

[0050] (1) Deep water is pretreated with activated carbon to remove suspended matter and volatile substances;

[0051] (2) Separate pure water and concentrated brine through a reverse osmosis membrane system (RO);

[0052] (3) The concentrated brine is directed to remove Na by the electrodeionizer (EDI) + , Ca 2+ 、Cl⁻、CO3 2- , forming brine containing more than 70 elements;

[0053] (4) The brine is distilled under negative pressure (pressure ≤ -0.08MPa) and sterilized by ultraviolet light to obtain the finished concentrated solution.

[0054] Example 3: Foliar Fertilizer Production (Macronutrient Type)

[0055] Substituting the water solvent: dilute the concentrate of Example 1 at a ratio of 1:10, and mix with NPK (20-20-20) to prepare a foliar fertilizer.

[0056] Element content: Mg 2+ 1800mg / L, K + 2500mg / L, Fe 3+ 50mg / L, B 3+ 30mg / L.

[0057] Example 4: Composite foliar fertilizer (containing Bacillus subtilis)

[0058] Concentrate parameters: TDS concentration of concentrate after magnetic fluid separation is 11000mg / L, Mg 2+ 2000mg / L;

[0059] Formula: concentrate + humic acid (5%) + amino acid (3%) + sugarcane juice (5%) + Bacillus subtilis (10 8 CFU / mL).

[0060] Example 5: Alginic acid foliar fertilizer

[0061] Alginic acid extract (5% w / w) and amino acids (3% w / w) were added to the concentrated solution prepared in Example 2 to prepare a composite foliar fertilizer.

[0062] Comparative Example 1: Production of foliar fertilizer using traditional seawater concentrate

[0063] Solvent: Ordinary surface seawater (TDS 35000 mg / L) was used.

[0064] Formula: Artificially added NPK (20-20-20) + MgSO4 + FeEDTA.

[0065] Comparative Example 2: Production of foliar fertilizer using traditional water solvent

[0066] Solvent: tap water (conductivity ≤ 100 μS / cm, mineral concentration < 20 mg / L);

[0067] Formula: same as comparative example 1

[0068] Application effect:

[0069] 1. Test material: Tomato variety Ruby, transplanted seedling age 35 days, test period 120 days

[0070] 2. Treatment groups (3 replicates per treatment, randomized block design):

[0071] T1: Example 3 (Magnetic fluid concentrate + macronutrient fertilizer)

[0072] T2: Example 4 (magnetic fluid concentrate + compound bacterial fertilizer)

[0073] T3: Example 5 (electrodeionization concentrate + alginate fertilizer)

[0074] CK1: Comparative Example 1 (Traditional seawater concentrated liquid fertilizer)

[0075] CK2: Comparative Example 2 (Traditional water-soluble fertilizer)

[0076] 3. Fertilization plan: Spray on leaves at a concentration of 0.3%, starting from the initial flowering period, spray once every 10 days, for a total of 5 times.

[0077] 4. Test tomato yield, quality and stress resistance:

[0078]

[0079] From the results in Table 1 above, we can see that the fruit setting rate of T1-T3 was significantly higher than that of the control group CK1 / CK2, and the yield per mu increased by 30.5%-44.6%. Among them, T2 (compound foliar fertilizer containing Bacillus subtilis) performed best, indicating the synergistic effect of deep ocean concentrate + beneficial bacteria. The Mg content in the concentrate was2+ (1800-2000mg / L) activates photosynthetic enzymes, small molecular cluster water (50-60 Hz) improves root water absorption efficiency, combined with more than 60 trace elements and trace elements in minerals to jointly improve fruit setting rate and fruit expansion speed, effectively improve root vitality and enhance nutrient absorption efficiency.

[0080] CK1 (traditional seawater concentrate) suffered from salt stress due to residual NaCl, resulting in a fruit set rate of only 84.2%, which verified the necessity of magnetic fluid separation technology for salt removal.

[0081]

[0082] Data format: mean ± standard deviation (biological replicates n=3)

[0083] From the results in Table 2 above, it can be seen that the vitamin C content and soluble sugar content of the embodiment are higher than those of CK1 / CK2, indicating that the concentrate provides a complete nutritional supply (Fe 3+ 、Mn 2+ Participating in enzyme synthesis) promotes the accumulation of secondary metabolites in the fruit, improving the flavor and nutritional value.

[0084] The incidence rate of T2 (compound bacterial fertilizer) was only 5.2%, which was 71.6% lower than that of CK2, proving that the trace elements and minerals retained in the deep ocean water concentrate have a significant antagonistic effect on pathogens.

[0085] CK1 has a leaf salt crystal area of 12.5cm due to the high concentration of NaCl remaining in the traditional seawater concentrate. 2 , which directly leads to the obstruction of photosynthesis, while the salt crystallization of the embodiment group (T1-T3) is 0, which verifies that the deep ocean water concentrate extracted by the process of the present invention completely avoids salt damage.

[0086] CK2 (traditional water-soluble fertilizer) had significantly lower yield and quality than the example group due to its lack of natural minerals. Although it did not exhibit excessive salt crystallization, it had the highest incidence of gray mold (18.3%) and the lowest nutritional index. This demonstrates that traditional water-soluble fertilizers, due to their lack of trace elements, weaken plant immunity and necessitate reliance on pesticides for disease control.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, import substitutions, changes and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for producing enhanced foliar fertilizer by using deep ocean water concentrate instead of water solvent, characterized in that: The following steps are involved: (1) Extraction of deep ocean water concentrate: deep ocean water is purified by physical separation process to obtain a concentrate containing ≥60 kinds of minerals, trace elements and microelements, wherein the radius of water molecules in the concentrate is 50-60 Hz and the total dissolved solids (TDS) concentration of ionic elements is ≥8000 mg / L; (2) Substituting water solvents for the production of foliar fertilizers: directly replacing traditional water solvents with the concentrated liquid to produce water-soluble enhanced foliar fertilizers or plant nutrient solutions without changing existing equipment and processes.

2. The method for producing enhanced foliar fertilizer by using deep ocean water concentrate instead of water solvent as claimed in claim 1, characterized in that: The method for extracting the deep ocean water concentrate in step (1) is a magnetic fluid separation method, which specifically includes: S1. Pretreatment: Deep ocean water with a water depth of ≥200m and a water temperature of 2-6°C is introduced into the PVC integrated membrane system for pretreatment, intercepting and removing organic macromolecular particles with a particle size of >0.1μm and organic matter with a molecular weight of >200Da, while retaining minerals and trace elements in ionic or small molecular states, to produce pretreated brine with a conductivity of ≤10μS / cm; S2, magnetic fluid directional separation: pressurize the pretreated brine to 0.8-1.2 MPa, pass it through a magnetic fluid seawater desalination separation device with a magnetic field strength of ≥1.5T in the form of a mist flow, and separate NaCl and CaCO3 in a directional manner to obtain the remaining brine; S3, low-temperature multi-effect distillation and concentration: introducing the remaining brine into a low-temperature multi-effect distillation system, performing distillation and concentration, separating fresh water, and obtaining a concentrate; S4. Terminal disinfection: using ultraviolet rays with a wavelength of 253.7 nm to perform continuous flow disinfection on the concentrated liquid to obtain deep ocean water concentrated liquid.

3. The method for producing enhanced foliar fertilizer by using deep ocean water concentrate instead of water solvent as claimed in claim 2, characterized in that: The PVC integrated membrane system in step S1 is integrated with ultrafiltration membrane, nanofiltration membrane and reverse osmosis membrane. Through three-stage membrane separation, the total water recovery rate is 60%-75%, of which the water flux of ultrafiltration membrane is 50-100L / (m 2 ・h), the operating pressure of nanofiltration membrane is 0.5-1.0MPa, and the operating pressure of reverse osmosis membrane is 1.5-2.5MPa.

4. The method for producing enhanced foliar fertilizer by using deep ocean water concentrate instead of water solvent as claimed in claim 3, characterized in that: The ultrafiltration membrane is made of polyvinylidene fluoride (PVDF) or polyethersulfone (PES) with a pore size of 0.01-0.1 μm; the nanofiltration membrane is an aromatic polyamide composite membrane with a molecular weight cutoff of 200-1000 Da; the reverse osmosis membrane is made of aromatic polyamide with a molecular weight cutoff of <200 Da and a desalination rate of ≥99%.

5. The method for producing enhanced foliar fertilizer by using deep ocean water concentrate instead of water solvent as claimed in claim 2, characterized in that: In step S2, the magnetic field strength of the magnetic fluid seawater desalination separation system is 1.5-2.5T. After the brine is raised to 0.8-1.2MPa by a pressure pump, it is formed into a mist flow with a droplet size of ≤50μm through an atomizing nozzle and introduced into the magnetic field separation chamber in a tangential direction.

6. The method for producing enhanced foliar fertilizer by using deep ocean water concentrate instead of water solvent as claimed in claim 5, characterized in that: During the directional separation process in step S2, the single separation efficiency of NaCl and CaCO3 is ≥92%, and the NaCl concentration in the remaining brine is ≤500 mg / L and the CaCO3 concentration is ≤300 mg / L.

7. The method for producing enhanced foliar fertilizer by using deep ocean water concentrate instead of water solvent as claimed in claim 2, characterized in that: The operating vacuum of the low-temperature multi-effect distillation system in step S3 is 5-30kPa, the distillation effect number is 3-5, the evaporation temperature of each effect decreases by 5-10°C, the first effect temperature is ≤60°C, the final effect temperature is ≥30°C, and the feed flow rate of the residual brine is 5-10m 3 / h, the water evaporation rate reaches 85%-90%, and the concentrated solution with the total dissolved solids (TDS) concentration of ionic elements is 8000-12000 mg / L.

8. The method for producing enhanced foliar fertilizer by using deep ocean water concentrate instead of water solvent as claimed in claim 2, characterized in that: The irradiation dose of the ultraviolet disinfection process in step S3 is ≥30mJ / cm 2 , the total colony count was controlled to ≤10 CFU / mL.

9. The method for producing enhanced foliar fertilizer by using deep ocean water concentrate instead of water solvent as claimed in claim 1, characterized in that: Mg in the concentrated solution 2+ Content ≥1500mg / L, and at least contains K + 、Sr 2+ 、Fe 3+ 、B 3+ ,I⁻,Si 4+ Essential elements for plants.

10. The method for producing enhanced foliar fertilizer by using deep ocean water concentrate instead of water solvent as claimed in claim 1, characterized in that: The water-soluble enhanced foliar fertilizer in step (2) includes a large amount of water-soluble enhanced foliar fertilizer, a trace element water-soluble enhanced foliar fertilizer, a medium amount of water-soluble enhanced foliar fertilizer, an amino acid-containing water-soluble enhanced foliar fertilizer, a humic acid-containing water-soluble enhanced foliar fertilizer, an alginate-containing water-soluble enhanced foliar fertilizer, an organic water-soluble enhanced foliar fertilizer, a yeast-containing, Bacillus subtilis-containing composite water-soluble enhanced foliar fertilizer, or a plant nutrient solution.

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