Method for increasing solubility of sea water crystals

Abstract

The present application relates to a kind of preparation methods of high solubility seawater crystal, comprising the following steps: S1, the sodium chloride of predetermined proportion is mixed with calcium chloride, obtain sodium chloride-calcium chloride premix, wherein calcium chloride is screened before mixing Processed;S2, the magnesium chloride of predetermined proportion, magnesium sulfate and potassium chloride are mixed and stirred, then sodium chloride-calcium chloride premix is added, and seawater crystal is prepared after being mixed uniformly.The method can reduce the adhesion of magnesium sulfate and calcium chloride, reduce the generation of insoluble calcium sulfate, solve the existing seawater crystal dissolution problem from the root, effectively improve the solubility of seawater crystal, speed up the dissolution rate, make the ion release more uniform, solve the problem of insufficient dissolution, easy to block, the dissolution effect of finished product is better than prior art.

Description

Technical Field

[0001] This invention relates to the field of sea crystal technology, and more specifically, to a method for improving the solubility of sea crystals. Background Technology

[0002] Sea crystals, as artificial simulations of natural seawater, have been widely used in aquaculture, marine organism cultivation, seawater environment simulation experiments, and coastal landscaping due to their controllable composition and ease of use. Solubility, as a core performance indicator, directly determines the product's dissolution rate and the uniformity of ion release in the water, thus affecting the actual performance in various application scenarios. Therefore, improving the solubility of sea crystals and solving problems such as clumping and incomplete dissolution during the dissolution process have become important research and development directions urgently needing breakthroughs in the field of sea crystal technology. Currently, existing sea crystal preparation processes still have many key defects, resulting in generally poor solubility of the finished product. Among them, the adhesion problem between calcium chloride and magnesium sulfate is the core bottleneck restricting the dissolution performance of sea crystals, and many oversights in the supporting processes further exacerbate this problem.

[0003] In existing sea crystal preparation processes, all raw materials are generally directly mixed and fed into the solution without a specific mixing scheme designed for the material characteristics of calcium chloride and magnesium sulfate. In actual production, magnesium sulfate heptahydrate is often used, which contains its own water of crystallization, while calcium chloride dihydrate is commonly used, which has strong viscosity. When the two are directly mixed and fed into the solution, the water of crystallization of magnesium sulfate further exacerbates the viscosity of calcium chloride, making the two raw materials easily adhere to each other and clump together during the mixing stage. Moreover, prolonged contact between the two will cause a chemical reaction to form white calcium sulfate, which will tightly coat the surface of magnesium sulfate particles, forming an insoluble coating layer. This not only directly hinders the contact between magnesium sulfate particles and water, but the insolubility of calcium sulfate itself will also significantly reduce the overall dissolution rate of the sea crystal, resulting in incomplete dissolution, scum and clumping in the water during use.

[0004] Meanwhile, existing preparation processes also have significant shortcomings in raw material pretreatment, component ratio, and mixing details. In some processes, calcium chloride raw materials are not sieved, resulting in coarse calcium chloride particles that not only dissolve slowly but also become the core of material agglomeration, further exacerbating the adhesion problem between calcium chloride and magnesium sulfate. Regarding component ratio design, the existing technology exhibits large fluctuations in the ratio range of various salts, failing to achieve a scientific ratio of sodium chloride, magnesium chloride, magnesium sulfate, potassium chloride, and calcium chloride. Imbalances in the proportions of components in some formulations lead to localized supersaturation of the water during sea crystal dissolution, exacerbating uneven dissolution. Furthermore, it is difficult to simultaneously simulate the ionic composition of natural seawater and the product's solubility. The mixing process lacks a reasonable premixing step design and a targeted raw material dispersion scheme. All raw materials are added to the mixing equipment at once, leading to not only the adhesion problem between calcium chloride and magnesium sulfate but also potentially excessively high local concentrations of other salts, resulting in uneven dispersion of raw materials. Consequently, the finished sea crystal has poor particle composition consistency, and the solubility of different particles varies considerably.

[0005] Furthermore, existing processes have shortcomings in raw material specification control and post-processing, further affecting the solubility of sea salt crystals. Some production processes lack sufficient control over the purity of potassium chloride, using potassium chloride with insufficient purity. The impurities not only affect the accuracy of the ionic composition of the sea salt crystals but also cause unnecessary interactions with other salts, altering the material's solubility characteristics. In post-processing stages such as material conveying and packaging, the conveying equipment used in most processes easily causes secondary agglomeration due to compression during transport. Some processes also lack strict weighing and screening steps, allowing products with substandard particle size and density to directly enter the market. The solubility of such products cannot meet usage standards.

[0006] The combined effects of these technological defects result in a common problem in existing sea crystal products: low solubility, slow dissolution rate, and uneven dissolution. This leads to numerous adverse effects across various application scenarios. In aquaculture, insufficiently dissolved sea crystals cause drastic fluctuations in the ion concentration of the aquaculture water, disrupting the osmotic pressure balance of aquatic animals, affecting their normal growth and development, and in severe cases, even causing death and resulting in aquaculture losses. In high-end applications such as marine organism cultivation and seawater environment simulation experiments, uneven dissolution of sea crystals leads to deviations in the ion composition of the test water, directly affecting the accuracy and reference value of the test results. In industrial seawater environment tests and coastal landscaping, low dissolution efficiency of sea crystals increases operation time and labor costs. Furthermore, the residual insoluble substances after dissolution increase the difficulty of water filtration and treatment, causing unnecessary impacts on the aquatic environment of the application scenarios. Currently, there is no sea crystal preparation process in the industry that can fundamentally solve the problem of calcium chloride and magnesium sulfate adhesion. Therefore, developing a preparation method that optimizes the mixing and feeding method, effectively reduces the adhesion of calcium chloride and magnesium sulfate, and improves the solubility of sea crystal has become an urgent technical problem to be solved in the field of sea crystal technology, and is also an inevitable requirement to promote the development of the sea crystal industry towards high quality and refinement. Summary of the Invention

[0007] The main objective of this invention is to propose a method for improving the solubility of sea salt crystals, which can reduce the adhesion of magnesium sulfate and calcium chloride and improve the dissolution effect of the finished product.

[0008] To solve the above-mentioned technical problems, the present invention proposes a method for preparing highly soluble sea crystals, characterized by the following steps: S1, mixing sodium chloride and calcium chloride in a predetermined ratio to obtain a sodium chloride-calcium chloride premix, wherein the calcium chloride is sieved before mixing; S2, mixing and stirring magnesium chloride, magnesium sulfate and potassium chloride in a predetermined ratio, then adding the sodium chloride-calcium chloride premix, and mixing evenly to obtain sea crystals.

[0009] The above technical solution further includes post-processing steps: S3, conveying the obtained sea crystals to a storage bin; S4, distributing and packaging the sea crystals in the storage bin; S5, weighing and screening the packaged sea crystals to remove products that do not meet the weight requirements; S6, stacking the weighed and screened sea crystals.

[0010] In any of the above technical solutions, further, the components of the sea crystal are proportioned by weight as follows: sodium chloride 70-72 parts, magnesium chloride 9-10 parts, magnesium sulfate 14.5-15.5 parts, potassium chloride 1.5-2.5 parts, and calcium chloride 1.5-2.5 parts.

[0011] In any of the above technical solutions, the preferred proportions of the sea crystal components by weight are: 71.43 parts sodium chloride, 9.6 parts magnesium chloride, 15.01 parts magnesium sulfate, 1.92 parts potassium chloride, and 2.04 parts calcium chloride.

[0012] In any of the above technical solutions, further, the magnesium chloride is magnesium chloride hexahydrate, the magnesium sulfate is magnesium sulfate heptahydrate, the potassium chloride is potassium chloride with a purity of 90%, and the calcium chloride is calcium chloride dihydrate.

[0013] In any of the above technical solutions, further, in step S1: sodium chloride and calcium chloride are weighed separately in independent storage tanks, and after weighing, calcium chloride is added to the storage tank containing sodium chloride and mixed.

[0014] In any of the above technical solutions, further, in step S2: magnesium chloride, magnesium sulfate, and potassium chloride are first added to the auxiliary material hopper, and after step S1 is completed, the auxiliary material hopper is raised and the materials are poured into the mixer.

[0015] In any of the above technical solutions, the outlet of the storage tank containing the sodium chloride-calcium chloride premix is ​​located above the mixer, and is fed into the mixer synchronously with the auxiliary material hopper.

[0016] In any of the above technical solutions, the finished sea crystals are further conveyed to the storage bin by a screw conveyor, and the sea crystals in the storage bin are then conveyed to the packaging machine by a screw conveyor for repackaging.

[0017] Beneficial effects: Compared with existing technologies, the finished sea crystal product has a better dissolving effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the process for producing the finished sea crystal product according to the present invention; Figure 2 This is a schematic diagram of the process for producing the finished sea crystal bag product according to the present invention. Detailed Implementation

[0020] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of this application, and not all of the embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0021] It should be noted that, as shown in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list; the method or apparatus may also include other steps or elements.

[0022] If the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0025] This invention proposes a method to improve the solubility of sea salt crystals.

[0026] The following examples will provide a detailed description of the method for improving the solubility of sea salt crystals according to this application.

[0027] Example 1: like Figure 1 As shown in the figure, this embodiment proposes a method for preparing highly soluble sea crystal, characterized by the following steps: S1, mixing sodium chloride and calcium chloride in a preset ratio to obtain a sodium chloride-calcium chloride premix, wherein the calcium chloride is sieved before mixing; S2, mixing and stirring magnesium chloride, magnesium sulfate and potassium chloride in a preset ratio, then adding the sodium chloride-calcium chloride premix, and mixing evenly to obtain sea crystal.

[0028] This method first sieves calcium chloride, then mixes it with sodium chloride in a preset ratio to prepare a sodium chloride-calcium chloride premix. At the same time, magnesium chloride, magnesium sulfate, and potassium chloride are mixed and stirred in a preset ratio. After the two groups of materials are premixed separately, the sodium chloride-calcium chloride premix is ​​added to the mixture of magnesium chloride, magnesium sulfate, and potassium chloride. After uniform mixing, sea crystals are obtained. By using a step-by-step premixing method, the raw materials are prevented from sticking together during the mixing process, thereby improving the solubility of sea crystals.

[0029] Current technologies for preparing sea crystals often involve directly mixing all raw materials without designing a mixing scheme that considers the characteristics of the materials. In some processes, calcium chloride is not screened, resulting in coarse calcium chloride particles that dissolve slowly and can become centers for material agglomeration, exacerbating adhesion between materials. Direct mixing of calcium chloride and magnesium sulfate leads to mutual adhesion and agglomeration. Prolonged contact between the two can also cause a reaction to form calcium sulfate, which coats the surface of magnesium sulfate particles, hindering their contact with water. The poor solubility of calcium sulfate also reduces the overall dissolution rate of the sea crystals. Furthermore, this one-time mixing method can result in localized excessively high concentrations of various raw materials, leading to uneven dispersion and poor consistency in the particle composition of the finished sea crystals. The varying solubility of different particles ultimately results in incomplete dissolution, scum formation in the water, and clumping during use.

[0030] This invention first sieves calcium chloride to remove coarse particles and impurities, preventing material agglomeration caused by these particles. Then, calcium chloride and sodium chloride are premixed separately, while magnesium chloride, magnesium sulfate, and potassium chloride are separately mixed and stirred to form homogeneous premixed systems. Finally, the two premixed systems are combined and stirred thoroughly. This method avoids direct contact between calcium chloride and magnesium sulfate in the initial mixing stage, reducing adhesion and agglomeration, and minimizing the chance of them reacting to form calcium sulfate. Furthermore, the step-by-step premixing method allows for more uniform dispersion of the raw materials, improving the uneven mixing problem in existing technologies and thus improving the overall solubility of sea salt.

[0031] Example 2: This embodiment is a further improvement based on Embodiment 1.

[0032] like Figure 2 As shown, in this embodiment, After the sea crystals are mixed and prepared, the finished product is temporarily stored in a dedicated storage bin in preparation for subsequent packaging. A packaging machine then divides the sea crystals in the storage bin into small packages, and an automatic bagging machine packs these packages into bags to ensure uniform packaging specifications. After packaging, all finished products are weighed and screened, with each product's weight checked individually. Products that do not meet the weight requirements are discarded, and only those that meet the weight requirements are retained. Finally, the qualified sea crystals that have passed the weighing and screening process are stacked using a robotic arm, completing the entire preparation process.

[0033] Example 3: This embodiment is a further improvement based on any of the above embodiments.

[0034] like Figure 2 As shown, in this embodiment, In the preparation of the sodium chloride-calcium chloride premix, sodium chloride and calcium chloride are weighed separately in independent storage containers. After weighing, calcium chloride is added to the container containing sodium chloride for mixing, ensuring accurate proportions and good initial dispersibility of the two raw materials. In the mixing of magnesium chloride, magnesium sulfate, and potassium chloride, the three raw materials are first added to a dedicated auxiliary material hopper. After the sodium chloride-calcium chloride premix is ​​prepared, the auxiliary material hopper is raised and the contents are poured into the mixer. Simultaneously, the outlet of the container containing the sodium chloride-calcium chloride premix is ​​positioned above the mixer, and materials are added to the mixer synchronously with the auxiliary material hopper, allowing the two sets of materials to mix synchronously within the mixer, improving overall mixing uniformity. After the sea crystals are prepared, a dedicated screw conveyor transports the finished product to a storage tank. During subsequent packaging, the same conveyor transports the sea crystals from the storage tank to the packaging equipment, completing the entire material transfer process using this conveying method.

[0035] Example 4: This embodiment is a further improvement based on any of the above embodiments.

[0036] In this embodiment, the components of the sea crystal are proportioned by weight as follows: sodium chloride 70-72 parts, magnesium chloride 9-10 parts, magnesium sulfate 14.5-15.5 parts, potassium chloride 1.5-2.5 parts, and calcium chloride 1.5-2.5 parts.

[0037] The formula is based on 70-72 parts by weight of sodium chloride, with a dry basis proportion that closely matches the salinity of natural seawater. This design fundamentally ensures that the osmotic pressure environment, identical to that of natural seawater, can be quickly established after water preparation, completely avoiding problems such as cell dehydration or edema, decreased stress response, and even death in aquatic animals due to osmotic stress. Furthermore, the formula, through the compounding of the remaining four components, simulates the proportions of core macro-ions in natural seawater. The potassium-sodium weight ratio almost perfectly matches the 1:27 baseline of natural seawater, matching the core physiological needs of aquatic animals for osmotic pressure balance and nerve conduction. Simultaneously, the amount of calcium ions added is strictly controlled within the safe range of 1.5-2.5 parts by weight, satisfying the essential nutritional needs of crustaceans for molting and hardening their shells and fish for cell membrane stability, while also mitigating the risk of calcium ions reacting with sulfate to form insoluble precipitates through the salt effect, ensuring the water solubility of all ions.

[0038] The formula employs a dual magnesium source design, consisting of 9-10 parts by weight of magnesium chloride and 14.5-15.5 parts by weight of magnesium sulfate. This is a key optimization that distinguishes it from ordinary low-grade marine crystals, offering multiple advantages in physiological function, product stability, and water buffering capacity. Magnesium ions are the core activators of hundreds of enzymes in marine organisms, participating in crucial life processes such as nerve conduction, muscle contraction, shell calcification, and protein synthesis. They are an essential element for mainstream short-term held species such as shrimp, crabs, and shellfish. The dual magnesium source design ensures an adequate supply of magnesium ions, effectively solving the industry pain points of short holding periods, molting failures, and high mortality rates caused by insufficient magnesium in low-grade formulas. Meanwhile, this formulation replaces some of the highly hygroscopic magnesium chloride with magnesium sulfate, which has lower hygroscopicity. While ensuring the total amount of magnesium ions, it significantly reduces the risk of moisture absorption and clumping of the product, and significantly improves storage stability and shelf life, perfectly meeting the long-term storage needs of commercial scenarios. In addition, the sulfate ions supplemented by magnesium sulfate are not only essential elements for biological sulfur metabolism and protein synthesis, but also effectively improve the total hardness and acid-base buffering capacity of the water, stabilizing the pH of the water in the golden range of natural seawater 7.8-8.4, avoiding aquatic stress caused by drastic pH fluctuations, while reducing the toxicity of ammonia nitrogen and nitrite, further improving the safety of temporary holding.

[0039] The formula controls the addition of potassium chloride and calcium chloride to 1.5-2.5 parts by weight, a near 1:1 equivalence design that enhances the stress resistance of aquatic animals while completely avoiding the risk of incompatibility and precipitation. When prepared with water at the commonly used salinity of 30-35‰ for commercial short-term holding, the potassium ion concentration of this formula perfectly matches the benchmark value of natural seawater. As a core cation in intracellular fluid, potassium ions can quickly alleviate the stress response of aquatic animals after long-distance transportation and fishing, maintain normal muscle vitality and nerve conduction, and significantly reduce the mortality rate of short-term holding after transportation. At the same time, the strictly controlled addition of calcium ions, with the salt effect of high-concentration sodium chloride, further enhances the solubility of calcium sulfate, fundamentally avoiding precipitation problems and ensuring that all components are completely dissolved. The water is clear and residue-free after preparation, requiring no long-term aeration, sedimentation, or filtration. It is ready to use immediately after preparation, perfectly suited to the high-frequency water preparation rhythm of commercial scenarios.

[0040] This formula boasts exceptional versatility and cost-effectiveness, making it ideal for bulk commercial applications such as seafood markets, restaurants, and seafood wholesalers. Its ionic system perfectly replicates the core macro-elemental composition of natural seawater, covering the short-term holding needs of most commercial seafood species, including bony fish, shrimp, crabs, shellfish, and cephalopods. No individual adjustments to the formulation are needed for different species, making it highly versatile. Furthermore, the formula contains no expensive trace elements, organic additives, or special buffers. Using only five readily available, low-cost core macro-elements of seawater, it achieves the core functions of natural seawater, resulting in low production costs and significantly superior short-term holding performance compared to lower-priced seawater crystals, offering outstanding commercial value. In addition, all components are highly water-soluble inorganic salts, eliminating the risk of incompatibility and precipitation. They dissolve rapidly even in cold water, leaving no turbidity or residue, requiring no complex activation steps and allowing for rapid deployment.

[0041] In addition, the stable ion strength and mineral nutrition system constructed by this formula can maintain the stability of the aquatic environment in the long term, avoid drastic fluctuations in water quality caused by ion imbalance, and at the same time, sufficient mineral elements can effectively enhance the immunity of aquatic animals, reduce the occurrence of bacterial diseases during temporary holding, significantly extend the safe temporary holding period of seafood, and greatly reduce seafood temporary holding losses in commercial scenarios.

[0042] Example 5: This embodiment is a further improvement based on any of the above embodiments.

[0043] In this embodiment, the preferred proportions of the sea crystal components by weight are: 71.43 parts sodium chloride, 9.6 parts magnesium chloride, 15.01 parts magnesium sulfate, 1.92 parts potassium chloride, and 2.04 parts calcium chloride.

[0044] The core advantage of this optimized formulation is its near-perfect replication of the constant ion ratios of standard seawater. This fundamentally eliminates the risk of ion deviations inherent in the original formulation range, achieving zero-error replication of natural seawater. The ocean waters, to which marine life has adapted for millions of years, exhibit a strict and constant ratio of core constant ions. This is the underlying logic behind the zero-stress temporary rearing of sea salt. The original formulation range only achieves a close approximation of this ratio within a certain interval. Selecting different values ​​within this range during production can lead to fluctuations in the core ion ratios of ±5% to ±15%. For example, using the lower limit for sodium chloride and the upper limit for magnesium salts will result in a significantly higher magnesium-sodium ratio, and vice versa. Such deviations can cause chronic physiological stress to aquatic animals, ranging from reduced vitality and shortened temporary rearing periods to increased stress-induced mortality. This optimized ratio, through precise component quantification, brings the relative ratios of the six core ions—sodium, chlorine, magnesium, sulfur, potassium, and calcium—to within a range of ±1% error compared to the standard seawater golden ratio. In particular, the potassium-sodium ratio, calcium-sodium ratio, and magnesium-sodium ratio, which determine osmotic pressure and cell homeostasis, almost completely overlap with those of natural seawater. This eliminates the stress risks caused by deviations in ion ratios at the source, making the temporary holding environment infinitely close to the native marine environment. This achieves a zero-stress temporary holding effect far superior to the range ratio, significantly improving the survival rate, vitality, and safe holding period of seafood.

[0045] This optimized formulation achieves a perfect 100-part dry basis ratio, completely resolving batch fluctuations and measurement errors inherent in range-based formulations, and achieving absolute consistency at the production end and precise standardization at the user end. Previously, the total dry basis weight fluctuated between 96.5 and 102.5 parts after the components in the original range-based formulation were superimposed. Differences in feed input between different batches during production led to uncontrollable fluctuations in the total salinity and ion concentration of the finished product. When using a fixed weight ratio at the user end, the actual water salinity would have an error of ±3% or more. For species requiring extremely high precision in temporary holding, such as lobster, abalone, and grouper, this error would directly lead to stress-induced losses. The weight of each component in this optimized formula is exactly 100 parts, with a total salt content of 100% on a dry basis and no redundant fluctuations. The feeding ratio for each batch in production is completely fixed, ensuring consistent ionic composition and salinity performance of the finished product. On the user side, precise quantification of salinity can be achieved. For example, to prepare standard temporary holding seawater at 30‰, it is only necessary to add it at a fixed ratio of 30g / L without additional conversion, testing, or adjustment. This completely solves the measurement errors and cumbersome operation problems caused by the original range of proportions, making it perfectly suitable for commercial scenarios with extremely high standardization requirements, such as chain restaurants, large-scale aquatic product wholesale, and seedling farms.

[0046] This optimized formulation achieves precise synergistic optimization of the two magnesium sources, ensuring physiological needs while achieving an optimal balance between storage stability, water buffering capacity, and dissolution performance, thus resolving the performance trade-offs inherent in the range of formulations. Within the range of 9-10 parts magnesium chloride and 14.5-15.5 parts magnesium sulfate, a natural performance trade-off exists: a higher proportion of magnesium chloride provides ample magnesium ion supply, but significantly increases the risk of moisture absorption and clumping, resulting in a significantly shortened shelf life; a higher proportion of magnesium sulfate improves storage stability, but excessive sulfate increases the risk of calcium sulfate precipitation, while simultaneously reducing the bioavailability of magnesium ions. The optimal ratio of 9.6 parts magnesium chloride and 15.01 parts magnesium sulfate perfectly strikes the golden balance point of synergistic dual magnesium sources: on the one hand, the total magnesium ion supply precisely matches the magnesium-sodium ratio of standard seawater, fully meeting the core physiological needs of shrimp and crab molting, shellfish calcification, and fish enzyme metabolism, without the problem of excessive or insufficient magnesium caused by the upper or lower limits of the range ratio; on the other hand, through the precise ratio of magnesium sulfate and magnesium chloride, the hygroscopicity of the product is controlled within the optimal range for commercial storage, completely avoiding the clumping and gelatinization problem when magnesium chloride is taken at the upper limit of the range ratio. At the same time, the total amount of sulfate is strictly controlled, and with the precise quantitative addition of 2.04 parts calcium chloride, the risk of calcium sulfate precipitation is completely avoided, achieving rapid and complete dissolution even in cold water environments, with clear water and no residue. The solubility and storage stability are superior to most range ratio combinations.

[0047] This optimized formulation achieves a precise match between stress resistance and physiological needs through the accurate quantitative combination of potassium and calcium, broadening the upper limit of compatibility for high-value-added products and addressing the shortcomings of the range-based formulation. Within the range-based formulation, the ranges of 1.5-2.5 parts potassium chloride and 1.5-2.5 parts calcium chloride exhibit significant limitations in compatibility: for high-value-added seafood such as lobster, abalone, and grouper, which are extremely sensitive to potassium and calcium concentrations, the lower limit of the range leads to insufficient potassium and calcium, resulting in molting failure, stress-induced delamination, and decreased vitality; while the upper limit leads to excessive potassium and calcium, increasing osmotic pressure stress and the risk of precipitation, failing to meet the needs of both mass-market and high-value-added products. The optimal ratio of 1.92 parts potassium chloride and 2.04 parts calcium chloride precisely locks the concentration of potassium and calcium ions at the benchmark values ​​of standard seawater. This not only meets the basic physiological needs of common fish, shrimp, shellfish, and crabs, but also fully adapts to the stringent requirements of high-value seafood for ion precision. It completely solves the compatibility shortcomings of range ratios, achieving full coverage of all types of seafood, from popular to premium seafood. The temporary holding effect is far superior to non-optimal combinations with range ratios.

[0048] In addition, this optimized formulation achieves an ultimate upgrade in commercial cost-effectiveness, completing a comprehensive leap in product performance without increasing production costs. This formulation uses the same five basic raw materials as the range formulation, without adding any expensive trace elements or organic additives. The raw materials are readily available, and the procurement costs are completely consistent with the range formulation, eliminating any cost increase issues. However, through precise quantitative optimization, the general performance of the range formulation is upgraded to the performance standards of professional-grade sea salt crystals. Temporary holding survival rate, shelf life, batch stability, and ease of operation are all significantly improved. Seafood loss rates in commercial scenarios are greatly reduced, and the overall cost-effectiveness is far superior to conventional products with the range formulation. Simultaneously, the precisely matched ion ratio maintains the long-term acid-base buffering capacity and ion balance of the water body, avoiding problems such as pH fluctuations and increased ammonia toxicity caused by deviations from the range formulation. This allows for more stable temporary holding over longer periods, further reducing operating costs and loss risks in commercial scenarios.

[0049] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for preparing highly soluble sea salt, characterized in that, Includes the following steps: S1, Sodium chloride and calcium chloride are mixed in a preset ratio to obtain sodium chloride-calcium chloride premix, wherein the calcium chloride is sieved before mixing; S2, magnesium chloride, magnesium sulfate and potassium chloride are mixed and stirred in a preset ratio, and then the sodium chloride-calcium chloride premix is ​​added. After mixing evenly, sea crystal is obtained.

2. The preparation method according to claim 1, characterized in that, It also includes post-processing steps: S3, the produced sea crystals are transported to the storage tank; S4, repackage the sea crystals in the storage bin; S5, weigh and screen the repackaged sea crystals, and remove products that do not meet the weight requirements. S6. Weigh and screen the qualified sea crystals and stack them.

3. The preparation method according to claim 1, characterized in that, The components of the sea crystal, by weight, are proportioned as follows: Sodium chloride 70-72 parts, magnesium chloride 9-10 parts, magnesium sulfate 14.5-15.5 parts, potassium chloride 1.5-2.5 parts, calcium chloride 1.5-2.5 parts.

4. The preparation method according to claim 3, characterized in that, The components of the sea crystal, by weight, are proportioned as follows: Sodium chloride 71.43 parts, magnesium chloride 9.6 parts, magnesium sulfate 15.01 parts, potassium chloride 1.92 parts, calcium chloride 2.04 parts.

5. The preparation method according to claim 1, characterized in that... The magnesium chloride is magnesium chloride hexahydrate, the magnesium sulfate is magnesium sulfate heptahydrate, the potassium chloride is potassium chloride with a purity of 90%, and the calcium chloride is calcium chloride dihydrate.

6. The preparation method according to claim 1, characterized in that, In step S1: Sodium chloride and calcium chloride are weighed separately in independent storage tanks. After weighing, calcium chloride is added to the storage tank containing sodium chloride and mixed.

7. The preparation method according to claim 1, characterized in that, In step S2: Magnesium chloride, magnesium sulfate, and potassium chloride are first added to the auxiliary material hopper. After step S1 is completed, the auxiliary material hopper is raised and the materials are poured into the mixer.

8. The preparation method according to claim 7, characterized in that, The outlet of the storage tank containing the sodium chloride-calcium chloride premix is ​​located above the mixer, and it feeds into the mixer synchronously with the auxiliary material hopper.

9. The preparation method according to claim 2, characterized in that, The finished sea crystals are conveyed to the storage bins by a screw conveyor, and then the sea crystals in the storage bins are conveyed to the packaging machine for repackaging.

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