Processing technology of high-potassium anti-crystallization liquid water-soluble fertilizer for fruit and vegetable fruit expansion

Abstract

The application discloses the technical field of water-soluble fertilizer processing and particularly relates to a processing technology for a fruit and vegetable fruit-expanding high-potassium anti-crystallization liquid water-soluble fertilizer, which comprises the following steps: step one, preparation of a base mother liquor; step two, high-pressure cavitation micro-jet microcrystal pre-planting treatment; step three, cyclodextrin-mediated multi-element coordination chelation treatment; step four, system deployment; step five, programmed temperature rising and falling cycle annealing stabilization treatment; and step six, post-treatment.The application has the beneficial effects that the defects of coarse potassium salt crystal grains, ion instability complex structure and microcrystal easy agglomeration and precipitation under temperature disturbance are solved, three processes are synergistically combined, crystallization precipitation is inhibited from three aspects of crystal nucleus generation, ion complexation and crystal stabilization, the finished product will not produce potassium salt crystallization during long-term storage at room temperature, the processing technology is suitable for various irrigation equipment in fields, and thus the industry pain point of easy pipe blockage of high-potassium liquid fertilizer is solved.

Description

Technical Field

[0001] This invention relates to the field of water-soluble fertilizer processing technology, specifically to a processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion. Background Technology

[0002] Fruit and vegetable expansion refers to the critical growth stage after fruit set, when fruits and vegetables enter a period of rapid growth and expansion. During this period, fruit cells divide rapidly and continue to elongate and expand, significantly increasing the demand for potassium, which directly determines the size, yield, and taste of the fruit. Imbalances in nutrient supply during this stage can easily lead to problems such as small fruit, deformities, and insufficient sweetness. Therefore, high-potassium liquid water-soluble fertilizers are often used in cultivation to quickly replenish potassium and ensure normal fruit expansion and development.

[0003] Fruit and vegetable fruit enlargement liquid water-soluble fertilizer is a liquid fertilizer specially designed for use during the fruit enlargement period of melons and vegetables. It uses high potassium as the core nutrient, combined with appropriate amounts of nitrogen, phosphorus, micronutrients, and organic synergists. It can be quickly dissolved in water and can be rapidly absorbed by crops through drip irrigation, fertigation, foliar spraying, etc. It specifically meets the nutrient needs of the fruit enlargement stage, promotes fruit enlargement, and improves fruit sweetness and marketability.

[0004] However, the existing processing technology for water-soluble fertilizers for fruit and vegetable fruit enlargement has shortcomings. The solubility of high-potassium raw materials is limited. Conventional production relies solely on heating and stirring to dissolve the raw materials, leaving a large number of coarse potassium salt crystals in the system. When the fertilizer is stored, slight temperature fluctuations cause the crystals to continuously agglomerate and grow, rapidly precipitating and clogging drip irrigation pipes. The industry's conventional solution relies solely on adding ordinary chelating agents and a small amount of anti-caking agents, which can only alleviate the crystallization problem in the short term and cannot inhibit crystal growth from the source of the crystal nucleus.

[0005] Therefore, we propose a processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion. Summary of the Invention

[0006] In view of the problems existing in the above and / or existing processing technology of high potassium anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion, the present invention is proposed.

[0007] Therefore, the purpose of this invention is to provide a processing technology for a high-potassium anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion. By improving the existing processing technology of water-soluble fertilizer for fruit and vegetable expansion, this invention can solve the shortcomings of the existing processing technology mentioned above. The high-potassium raw material has limited solubility. Conventional production relies solely on heating and stirring to dissolve the raw material, leaving a large number of coarse potassium salt crystals in the system. When the fertilizer is stored, slight temperature fluctuations cause the crystals to continuously agglomerate and grow, rapidly precipitating and clogging drip irrigation pipes. The industry's conventional solution relies solely on adding ordinary chelating agents and a small amount of anti-caking agents, which can only alleviate the crystallization problem in the short term and cannot inhibit crystal growth from the source of the crystal nucleus.

[0008] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0009] A processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion, comprising the following steps:

[0010] Step 1: Preparation of basic mother liquor. Add high-potassium nitrogen-phosphorus-potassium raw materials to purified water according to the specified ratio, heat and stir until completely dissolved to obtain basic mother liquor.

[0011] Step 2: High-pressure cavitation microjet microcrystal pre-implantation treatment. The base mother liquor is circulated into a high-pressure cavitation microjet device for treatment. The high-speed shear and impact force generated by cavitation collapse breaks the primary potassium salt crystals and induces the in-situ generation of uniformly distributed submicron-sized microcrystal nuclei in the system, thus obtaining the microcrystal acclimatization mother liquor.

[0012] Step 3: Cyclodextrin-mediated multi-component coordination chelation treatment. Micronutrient salts, chelating agents and hydroxypropyl-β-cyclodextrin are added to the microcrystal domestication mother liquor. The mixture is kept warm and stirred to carry out the encapsulation chelation reaction, thereby constructing a cyclodextrin-mediated multi-component coordination complexation system of potassium ions and micronutrients, and obtaining the chelation mother liquor.

[0013] Step 4: System preparation. Add fruit-expanding functional adjuvant to the chelation mother liquor and stir to obtain the stabilizing solution.

[0014] Step 5: Programmed temperature rise and fall cyclic annealing stabilization treatment. The liquid to be stabilized is placed in a programmable temperature control device and subjected to multiple rounds of gradient temperature rise and fall cyclic annealing treatment. Through dynamic dissolution-reprecipitation equilibrium stabilization of microcrystal morphology, the path of grain agglomeration and growth is blocked, and a stable liquid is obtained.

[0015] Step 6: Post-processing. The stabilized liquid is filtered and bottled to obtain a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion.

[0016] As a preferred embodiment of the processing technology of a high-potassium anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion described in this invention, wherein: the high-potassium nitrogen, phosphorus and potassium raw materials in step one use potassium nitrate and potassium dihydrogen phosphate as the main potassium sources, and are supplemented with urea and monoammonium phosphate to supplement nitrogen and phosphorus nutrients, and the mass ratio of nitrogen, phosphorus and potassium in the finished product is 12:6:35, and the total nutrient mass fraction is ≥500g / L.

[0017] As a preferred embodiment of the processing technology of a high-potassium anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion described in this invention, wherein: the working pressure of the high-pressure cavitation microjet treatment in step two is 100MPa, the number of cycles is 3, the treatment temperature is controlled at 45℃, and the microcrystal nucleus particle size in the system after treatment is controlled at 600nm.

[0018] As a preferred embodiment of the processing technology of a high-potassium anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion described in this invention, wherein: the chelating agent in step three is one or more of disodium ethylenediaminetetraacetate, citric acid, and potassium humate; the amount of hydroxypropyl-β-cyclodextrin added is 1% of the total mass of the liquid; the chelation reaction temperature is 55℃; the pH is controlled at 6; and the reaction time is 50 min.

[0019] As a preferred embodiment of the processing technology of a high-potassium anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion described in this invention, the temperature range of the gradient heating and cooling cyclic annealing treatment in step five is 30°C, the heating and cooling rate is 3°C / min, each temperature point is kept constant for 30min, the cycle is 5 rounds, and the liquid is restored to room temperature after the cycle is completed.

[0020] As a preferred embodiment of the processing technology of the fruit and vegetable fruit expansion high potassium anti-crystallization liquid water-soluble fertilizer of the present invention, wherein: the fruit expansion functional adjuvant in step four is one or more of compound amino acids, potassium alginate, sugar alcohol, and organosilicon surfactant, and the total addition amount is 5% of the total mass of the liquid.

[0021] As a preferred embodiment of the processing technology of a high-potassium anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion described in this invention, the filtration in step six adopts a two-stage filtration, with a primary filtration accuracy of 100μm and a fine filtration accuracy of 10μm, and the filling environment temperature is controlled at 30℃.

[0022] As a preferred embodiment of the processing technology of a high-potassium anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion described in this invention, in step one, when preparing the basic mother liquor, the ratio of nitrogen, phosphorus, and potassium raw materials can be adjusted according to the type of fruit and vegetable being planted to meet the nutrient requirements of different fruit and vegetable expansion stages.

[0023] As a preferred embodiment of the processing technology of the fruit and vegetable fruit expansion high potassium anti-crystallization liquid water-soluble fertilizer of the present invention, wherein: the finished liquid water-soluble fertilizer after filling in step six will not precipitate potassium salt crystals during long-term storage at room temperature, and can be adapted to various field application methods such as drip irrigation, fertigation, and foliar spraying.

[0024] As a preferred embodiment of the processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion described in this invention, the entire processing technology can be used in conjunction with a conventional liquid fertilizer continuous production line, and can achieve large-scale continuous production without the need to modify large-scale special equipment.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0026] 1. This invention solves the defects of existing processes, such as large potassium salt crystals, lack of stable ion complexation structure, and easy agglomeration and precipitation of microcrystals due to temperature disturbance. First, the original large crystals are broken up by high-pressure cavitation to generate uniform and fine microcrystal nuclei in situ. Then, a multi-element coordination system of potassium ions and trace elements is constructed with the help of cyclodextrin. Finally, gradient heating and cooling annealing is used to stabilize and shape the microcrystal structure. The three processes work together to inhibit crystallization and precipitation from three levels: crystal nucleus generation, ion complexation, and crystal stabilization. The finished product will not produce potassium salt crystals when stored at room temperature for a long time. It is suitable for various irrigation equipment in the field, thus solving the industry pain point of easy pipe blockage of high potassium liquid fertilizer.

[0027] 2. In this invention, by using cyclodextrin to simultaneously encapsulate trace elements and coordinate potassium ions, and combining it with compound amino acids, sugar alcohols and other fruit-enlarging adjuvants, the overall stability of the fertilizer is improved, the absorption rate of potassium and trace elements by fruits and vegetables is accelerated, the fruit enlargement and sweetening are promoted, the marketable fruit rate of fruits and vegetables is increased, and the fertilizer's anti-crystallization performance and fruit-enlarging and yield-increasing effect are taken into account. Its functionality is superior to that of ordinary high-potassium liquid fertilizer.

[0028] 3. In this invention, there is no need to customize large-scale dedicated equipment. High-pressure micro-jet and programmable temperature control devices can be matched with existing conventional liquid fertilizer production lines. The nitrogen, phosphorus and potassium ratio can be adjusted according to different fruits and vegetables such as tomatoes, grapes and melons. It can achieve both small-scale intermittent production and continuous batch processing. The production threshold is low and it is easy for fertilizer companies to implement and promote it. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the process of the present invention;

[0030] Figure 2 This is a schematic diagram of the high-pressure cavitation microjet microcrystal pre-implantation treatment of the present invention;

[0031] Figure 3 This is a schematic diagram of the programmed heating and cooling cycle annealing stabilization process of the present invention;

[0032] Figure 4 This is a schematic diagram of the post-processing of the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0034] This invention provides a processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion. This technology overcomes the shortcomings of existing processes, such as large potassium salt crystals, lack of stable ion complexation, and easy agglomeration and precipitation of microcrystals due to temperature disturbances. First, high-pressure cavitation breaks down the existing large crystals, generating uniform, fine microcrystal nuclei in situ. Then, cyclodextrin is used to construct a multi-element coordination system of potassium ions and trace elements. Finally, gradient heating and cooling annealing stabilizes the microcrystal structure. These three processes work synergistically to inhibit crystallization from three levels: crystal nucleus generation, ion complexation, and crystal stabilization. The finished product will not crystallize potassium salts even after long-term storage at room temperature. It is compatible with various irrigation equipment in the field, thus solving the industry pain point of easy pipe clogging with high-potassium liquid fertilizer.

[0035] Please see Figure 1-4 A processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion includes the following steps: Step 1: Preparation of basic mother liquor, adding high-potassium nitrogen, phosphorus and potassium raw materials to purified water according to the ratio, heating and stirring until completely dissolved to obtain basic mother liquor; Step 2: High-pressure cavitation microjet microcrystal pre-planting treatment, circulating the basic mother liquor in a high-pressure cavitation microjet device, using the high-speed shear and impact force generated by cavitation collapse to break the primary potassium salt crystals, inducing the in-situ generation of uniformly distributed submicron-sized microcrystal nuclei within the system, to obtain microcrystal acclimatization mother liquor;

[0036] Step 3: Cyclodextrin-mediated multi-element coordination chelation treatment. Micronutrient salts, chelating agents, and hydroxypropyl-β-cyclodextrin are added to the microcrystal domestication mother liquor. The mixture is kept warm and stirred to carry out an encapsulation chelation reaction, constructing a cyclodextrin-mediated potassium ion and micronutrient multi-element coordination complex system, yielding a chelation mother liquor. Step 4: System preparation. A fruit-expanding functional additive is added to the chelation mother liquor, and the mixture is stirred until homogeneous, yielding a solution to be stabilized. Step 5: Programmed temperature rise and fall cyclic annealing stabilization treatment. The solution to be stabilized is placed in a programmed temperature control device and subjected to multiple rounds of gradient temperature rise and fall cyclic annealing treatment. Through dynamic dissolution-reprecipitation equilibrium stabilization of the microcrystal morphology, the path of crystal agglomeration and growth is blocked, resulting in a stable solution.

[0037] Step Six: Post-processing. The stabilized liquid is filtered and bottled to obtain a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion. This process solves the defects of existing processes, such as large potassium salt crystals, lack of stable ion complexation structure, and easy agglomeration and precipitation of microcrystals due to temperature disturbances. First, the original large crystals are broken up by high-pressure cavitation to generate uniform and fine microcrystal nuclei in situ. Then, a multi-element coordination system of potassium ions and trace elements is constructed with the help of cyclodextrin. Finally, gradient heating and cooling annealing is used to stabilize and shape the microcrystal structure. The three processes work together to inhibit crystallization from three levels: crystal nucleus generation, ion complexation, and crystal stabilization. The finished product will not produce potassium salt crystals when stored at room temperature for a long time. It is compatible with various irrigation equipment in the field, thus solving the industry pain point of easy pipe clogging of high-potassium liquid fertilizer.

[0038] In step one, the high-potassium nitrogen-phosphorus-potassium raw material uses potassium nitrate and potassium dihydrogen phosphate as the main potassium sources, supplemented with urea and monoammonium phosphate to provide nitrogen and phosphorus nutrients. The mass ratio of nitrogen, phosphorus and potassium in the finished product is 12:6:35, and the total nutrient mass fraction is ≥500g / L. In step two, the working pressure of the high-pressure cavitation microjet treatment is 100MPa, the number of cycles is 3, the treatment temperature is controlled at 45℃, and the microcrystal nucleus particle size in the system after treatment is controlled at 600nm. In step three, the chelating agent is one or more of disodium ethylenediaminetetraacetate, citric acid and potassium humate. The amount of hydroxypropyl-β-cyclodextrin added is 1% of the total mass of the liquid. The chelation reaction temperature is 55℃, the pH is controlled at 6, and the reaction time is 50min.

[0039] In step five, the temperature range of the gradient heating and cooling cyclic annealing treatment is 30℃, the heating and cooling rate is 3℃ / min, each temperature point is held constant for 30min, and the cycle is 5 times. After the cycle is completed, the liquid is restored to room temperature. In step four, the fruit-expanding functional additive is one or more of the following: compound amino acids, potassium alginate, sugar alcohol, and organosilicon surfactant. The total amount added is 5% of the total mass of the liquid. In step six, the filtration adopts two-stage filtration. The primary filtration accuracy is 100μm, the fine filtration accuracy is 10μm, and the filling environment temperature is controlled at 30℃.

[0040] When preparing the base mother liquor in step one, the ratio of nitrogen, phosphorus, and potassium raw materials can be adjusted according to the types of fruits and vegetables being planted to meet the nutrient requirements of different fruits and vegetables at the fruit expansion stage. After the finished liquid water-soluble fertilizer is bottled in step six, it will not precipitate potassium salt crystals during long-term storage at room temperature and can be used for various field application methods such as drip irrigation, fertigation, and foliar spraying. The entire processing technology can be used in conjunction with conventional liquid fertilizer continuous production lines, and large-scale continuous production can be achieved without modifying large-scale special equipment.

[0041] The workflow of this invention is as follows: potassium nitrate and potassium dihydrogen phosphate are selected as the main potassium sources according to the target nutrient ratio, and urea and monoammonium phosphate are added to supplement nitrogen and phosphorus nutrients. All solid raw materials are added to purified water and heated and stirred continuously until all solid raw materials are completely dissolved to obtain a uniform and transparent basic mother liquor. Production personnel can flexibly adjust the addition ratio of nitrogen, phosphorus and potassium raw materials according to the nutrient requirements of different fruits and vegetables such as grapes, strawberries and various melons to adapt to various fruit and vegetable planting scenarios and complete the basic dissolution of raw materials without crystal structure control.

[0042] The entire base mother liquor is transported to the high-pressure cavitation microjet device for circulation. The high pressure inside the device generates cavitation bubbles. The collapse of these bubbles generates strong shear and impact forces, breaking up the coarse primary potassium salt crystals that are not completely dispersed in the mother liquor. At the same time, it induces the formation of a large number of uniformly distributed submicron-sized microcrystal nuclei throughout the entire solution system. After multiple cycles, a microcrystal-acclimated mother liquor is obtained, which actively pre-embeds fine crystal nuclei in the system. Subsequent nutrient analysis shows that the microcrystals will only grow slowly by attaching to the existing microcrystal nuclei and will not rapidly form large crystals visible to the naked eye.

[0043] The microcrystalline acclimation mother liquor was transferred to a heat-insulated reaction vessel, and various trace element salts, conventional chelating agents, and hydroxypropyl-β-cyclodextrin were added sequentially. The mixture was stirred continuously at a constant temperature to carry out the encapsulation chelation reaction. The special cavity structure of cyclodextrin can encapsulate trace element ions, and the outer hydroxyl groups form coordination hydrogen bonds with potassium ions in the solution, thus constructing a multi-element stable complex system in which potassium ions and trace elements coexist, avoiding the separate precipitation of potassium and trace element ions. After the reaction, a stable chelation mother liquor was obtained.

[0044] After the chelation process is completed, the system is prepared by adding a fruit-expanding functional adjuvant consisting of compound amino acids, potassium alginate, sugar alcohol, and organosilicon surfactant to the chelation mother liquor. The mixture is stirred at a constant speed until all adjuvants are fully integrated to obtain a stable liquid. Various organic adjuvants can not only improve the crop absorption rate, but also help to weaken the tendency of ion aggregation, further strengthening the basic conditions for fertilizer to resist crystallization.

[0045] The prepared stabilizing solution is transferred to a heat preservation device with programmed temperature control. Multiple rounds of gradient heating and cooling cycles are carried out according to the set rate. During the repeated cycles of heating, maintaining constant temperature, and cooling, a dynamic equilibrium is achieved in the microcrystals inside the solution, resulting in the dissolution of trace amounts and uniform re-precipitation. This eliminates the internal stress of the microcrystals, making all microcrystals tend to be uniform in size and shape, and blocking the path of crystal grains sticking together and agglomerating during storage. After the cycle ends and the temperature is restored to room temperature, a structurally stable solution is obtained.

[0046] A two-stage filtration method is used to purify the stable liquid. First, coarse filtration removes a small amount of insoluble impurities, and then fine filtration removes fine impurity particles. After filtration, the liquid is filled and sealed under suitable conditions to finally obtain the finished product of high-potassium anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion.

[0047] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion, characterized in that, The processing technology includes the following steps: Step 1: Preparation of basic mother liquor. High-potassium nitrogen-phosphorus-potassium raw materials are added to purified water according to the specified ratio, and heated and stirred until completely dissolved to obtain basic mother liquor. Step 2: High-pressure cavitation microjet microcrystal pre-implantation treatment. The base mother liquor is circulated into a high-pressure cavitation microjet device for treatment. The high-speed shear and impact force generated by cavitation collapse breaks the primary potassium salt crystals and induces the in-situ generation of uniformly distributed submicron-sized microcrystal nuclei in the system, thus obtaining the microcrystal acclimatization mother liquor. Step 3: Cyclodextrin-mediated multi-component coordination chelation treatment. Micronutrient salts, chelating agents and hydroxypropyl-β-cyclodextrin are added to the microcrystal domestication mother liquor. The mixture is kept warm and stirred to carry out the encapsulation chelation reaction, thereby constructing a cyclodextrin-mediated multi-component coordination complexation system of potassium ions and micronutrients, and obtaining the chelation mother liquor. Step 4: System preparation. Add fruit-expanding functional adjuvant to the chelation mother liquor and stir to obtain the stabilizing solution. Step 5: Programmed temperature rise and fall cyclic annealing stabilization treatment. The liquid to be stabilized is placed in a programmable temperature control device and subjected to multiple rounds of gradient temperature rise and fall cyclic annealing treatment. Through dynamic dissolution-reprecipitation equilibrium stabilization of microcrystal morphology, the path of grain agglomeration and growth is blocked, and a stable liquid is obtained. Step 6: Post-processing. The stabilized liquid is filtered and bottled to obtain a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion.

2. The processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion according to claim 1, characterized in that, The high-potassium nitrogen-phosphorus-potassium raw material mentioned in step one uses potassium nitrate and potassium dihydrogen phosphate as the main potassium sources, supplemented with urea and monoammonium phosphate to supplement nitrogen and phosphorus nutrients. The mass ratio of nitrogen, phosphorus and potassium in the finished product is 12:6:35, and the total nutrient mass fraction is ≥500g / L.

3. The processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion according to claim 2, characterized in that, The working pressure of the high-pressure cavitation microjets in step two is 100 MPa, the number of cycles is 3, the treatment temperature is controlled at 45℃, and the microcrystal nucleus particle size in the system after treatment is controlled at 600 nm.

4. The processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion according to claim 3, characterized in that, The chelating agent mentioned in step three is one or more of disodium ethylenediaminetetraacetate, citric acid, and potassium humate. The amount of hydroxypropyl-β-cyclodextrin added is 1% of the total mass of the liquid. The chelation reaction temperature is 55℃, the pH is controlled at 6, and the reaction time is 50 min.

5. The processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion according to claim 4, characterized in that, The temperature range of the gradient heating and cooling cyclic annealing process in step five is 30℃, the heating and cooling rate is 3℃ / min, each temperature point is kept constant for 30min, the cycle is 5 rounds, and the liquid is restored to room temperature after the cycle is completed.

6. The processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion according to claim 5, characterized in that, The fruit-expanding functional additive mentioned in step four is one or more of the following: compound amino acids, potassium alginate, sugar alcohol, and organosilicon surfactant, with a total addition amount of 5% of the total mass of the liquid.

7. The processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion according to claim 6, characterized in that, The filtration described in step six uses a two-stage filtration process, with a primary filtration accuracy of 100μm and a fine filtration accuracy of 10μm. The filling environment temperature is controlled at 30℃.

8. The processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion according to claim 7, characterized in that, When preparing the basic mother liquor in step one, the ratio of nitrogen, phosphorus, and potassium raw materials can be adjusted according to the types of fruits and vegetables being grown to meet the nutrient requirements of different fruits and vegetables at the fruit expansion stage.

9. The processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion according to claim 8, characterized in that, The finished liquid water-soluble fertilizer, after being filled in step six, will not precipitate potassium salt crystals during long-term storage at room temperature. It is suitable for various field application methods, including drip irrigation, fertigation, and foliar spraying.

10. The processing technology for a high-potassium, anti-crystallization liquid water-soluble fertilizer for fruit and vegetable expansion according to claim 9, characterized in that, The entire processing technology can be used with conventional liquid fertilizer continuous production lines, enabling large-scale continuous production without the need to modify large-scale specialized equipment.

Images