Deep well sun-dried salt production process

Abstract

The invention discloses a deep well sun-dried salt production process which comprises a series of steps of extracting underground deep brine, filtering, preparing brine, crystallizing, forming salt, collecting salt and collecting lumps, dripping brine, packaging and marketing and the like. Compared with common salt produced by a traditional process, the production process of the deep well sun-dried salt disclosed by the invention contains various natural minerals such as calcium, magnesium, zinc, selenium, potassium and the like besides being rich in sodium chloride, and can promote metabolism of a body and maintain acid-base balance of the body.

Description

Technical Field

[0001] The present invention relates to the technical field of solar salt production, and more specifically to a deep well solar salt production process. Background Art

[0002] Traditional solar salt production mostly relies on surface water sources, such as seawater or saltwater lake water. These water sources may be restricted by season, climate and geographical location, resulting in unstable supply of raw materials. In addition, surface water sources may contain more impurities and pollutants, and need to go through a complex treatment process before they can be used for salt production.

[0003] In comparison, underground brine resources are abundant and stable, not affected by seasons and climate, and can be used as an alternative raw material for traditional solar salt production. Deep well brine usually contains fewer impurities and pollutants. Using deep well brine for solar salt production can reduce dependence on and pollution of surface water sources, which meets the requirements of environmental protection and sustainable development.

[0004] Therefore, how to provide a deep well solar salt production process without any industrial process, which is aimed at producing deep well solar salt that people can eat with confidence, is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In view of this, the present invention provides a deep well solar salt production process.

[0006] To achieve the above object, the present invention provides the following technical solution, which mainly includes the following steps:

[0007] S1. Extraction of brine: Use a high-power, high-lift submersible pump to extract underground brine from a well at least 200 meters deep;

[0008] S2, Filtration: The extracted brine is transported to the filtration tank through a pipeline, and impurities are removed using multi-stage filtration media;

[0009] S3, brine preparation: the filtered brine is directed to the evaporation pond step by step, filtered and evaporated to obtain intermediate brine, and then the water in the underground brine is gradually evaporated, the salt concentration gradually increases, and saturated brine is formed and transferred to the brine preservation pond for storage;

[0010] S4, crystallization: pouring saturated brine into the crystallization pool and continuing to sun-dry, so that the brine naturally crystallizes into salt, and through further filtration and evaporation, the salt in the brine is precipitated in solid form to form salt crystals;

[0011] S5, salt formation: When the salt in the crystallization pool is precipitated, the used brine needs to be withdrawn and new saturated brine is injected to crystallize into salt;

[0012] S6, collecting salt and collecting lumps: collecting the salt crystallized in the crystallization pool and transporting it to the lumps platform;

[0013] S7. Brine: After the sun-dried salt is piled up on the platform, it is naturally stored for more than 2 months to allow the brine in the salt to naturally leak out.

[0014] Preferably, the filtration pool adopts a multi-layer filtration structure, including but not limited to a sand layer, an activated carbon layer and a fine filtration layer.

[0015] Preferably, the filtered brine is guided to the evaporation pond step by step, and the principle of natural evaporation by sunlight and wind is used to gradually evaporate the water in the underground brine, and the salt concentration gradually increases to form saturated brine.

[0016] Preferably, the high-power and high-lift submersible pump has a power of at least 30 kilowatts and has a pump body and seals made of corrosion-resistant materials.

[0017] It can be seen from the above technical solutions that compared with the prior art, the deep well solar salt production process disclosed in the present invention is rich in sodium chloride and contains a variety of natural minerals, such as calcium, magnesium, zinc, selenium, potassium and other substances, compared with the common salt produced by the traditional process, which can promote the body's metabolism and maintain the body's acid-base balance. Therefore, deep well solar salt has more comprehensive nutritional value, is more beneficial to physical health, and can help balance the various trace elements required by the human body. In addition, the deep well solar salt production process is pure and does not contain any artificial additives or chemical ingredients. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the production process of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Please see attached Figure 1 ,

[0022] The deep well solar salt production process disclosed in the present invention mainly comprises the following steps:

[0023] S1. Extraction of brine: Use a high-power, high-lift submersible pump to extract underground brine from a well at least 200 meters deep;

[0024] S2, Filtration: The extracted brine is transported to the filtration tank through a pipeline, and impurities are removed using multi-stage filtration media;

[0025] S3, brine preparation: the filtered brine is directed to the evaporation pond step by step, filtered and evaporated to obtain intermediate brine, and then the water in the underground brine is gradually evaporated, the salt concentration gradually increases, and saturated brine is formed and transferred to the brine preservation pond for storage;

[0026] S4, crystallization: pouring saturated brine into the crystallization pool and continuing to sun-dry, so that the brine naturally crystallizes into salt, and through further filtration and evaporation, the salt in the brine is precipitated in solid form to form salt crystals;

[0027] S5. Salt formation: When the salt in the crystallization pool is precipitated, the used brine needs to be withdrawn and then new saturated brine is injected to crystallize into salt.

[0028] S6, collecting salt and collecting lumps: collecting the salt crystallized in the crystallization pool and transporting it to the lumps platform;

[0029] S7, brine: After the sun-dried salt is piled up on the platform, it is naturally stored for more than 2 months to allow the brine in the salt to naturally leak out;

[0030] In order to further optimize the above technical solution, the high-power high-lift submersible pump has a power of at least 30 kilowatts, and is designed with a pump body and seals made of corrosion-resistant materials to adapt to the special environment of deep well brine. The underground brine is an important raw material for making solar salt. The high-power high-lift submersible pump can be used to extract brine from a well as deep as 200 meters, providing a stable source of raw materials for the production of solar salt. The submersible pump is a type of pump that directly submerges the pump body into the water to work. It uses the rotation of the impeller to generate centrifugal force, thereby throwing the liquid from the center of the impeller to the surroundings, forming a certain pressure difference, so that the liquid is sucked in and discharged. The high-power high-lift submersible pump has a stronger suction capacity and a higher lift, and can overcome greater resistance.

[0031] In order to further optimize the above technical solution, the filtration pool adopts a multi-layer filtration structure, including but not limited to a sand layer, an activated carbon layer and a fine filtration layer, so as to effectively remove suspended matter, organic matter and some soluble impurities in the brine.

[0032] In order to further optimize the above technical solution, the filtered brine is guided to the evaporation pond step by step, and the water in the underground brine is gradually evaporated by the principle of natural evaporation under the sun and wind, and the salt concentration gradually increases to form saturated brine. The main function of the brine preservation pond is to store and maintain the concentration of saturated brine. The saturated brine is a key raw material for salt production, and its concentration and stability directly affect the quality and output of the final salt product. By storing saturated brine, the brine preservation pond can ensure a stable supply of brine and a moderate concentration during the evaporation salt production process.

[0033] In order to further optimize the above technical scheme, in the step of crystallization into salt, the old brine is withdrawn and new brine is injected, which can ensure that the salt concentration in the crystallization pool is always maintained at a high level, thereby accelerating the crystallization process of the salt and improving production efficiency. The production of solar salt mainly relies on the principle of evaporation crystallization. After the brine is injected into the crystallization pool, under the action of sunlight and wind, the water in the brine gradually evaporates, the salt gradually concentrates, and when it reaches saturation, the salt will crystallize out. Withdrawing the old brine and injecting new brine can ensure that the salt concentration in the crystallization pool is always maintained at a high level, which is conducive to the crystallization of salt. In the brine, there is a solubility balance between various salts. When a salt crystallizes and precipitates, it will break the original solubility balance, causing the solubility of other salts to change. Withdrawing the old brine can avoid the adverse effects of this change in solubility balance on the subsequent crystallization process, and injecting new brine can restore the solubility balance and provide conditions for the next round of crystallization process.

[0034] The change in the content of sodium sulfate and other salts in the old brine can reflect the progress of the salt drying process. When the sodium sulfate content rises to a certain level, it indicates that the salt drying process is about to end. At this time, the old brine should be withdrawn in time and new brine should be injected.

[0035] In order to further optimize the above technical solution, when a thick layer of salt grows in the crystallization pool, workers use another bamboo salt rake to pile the salt into small salt piles, and then manually load the salt into small salt trucks and transport the salt to the salt pile platform, and use conveyor belts to pile the salt into salt piles.

[0036] In order to further optimize the above technical solution, after the sun-dried salt is collected on the platform, it is naturally stored for more than 2 months to allow the brine retained in the salt to naturally seep out, so that the moisture content in the salt meets the national edible salt standard requirements.

[0037] In order to further optimize the above technical solution, the deep well solar salt on Tuotai is stored for more than 2 months. After the water content reaches the national edible salt implementation standard, the deep well solar salt is transported to the processing workshop of the salt factory, first manually screened, then manually filled in individual barrels, and each barrel is affixed with an edible salt traceability code (one barrel, one code, that is, each barrel of deep well solar salt has its own unique identity certificate). It is then transported to markets at all levels for sale.

[0038] Compared with the common salt produced by the traditional process, the deep well solar salt production process disclosed by the present invention is not only rich in sodium chloride, but also contains a variety of natural minerals, such as calcium, magnesium, zinc, selenium, potassium and other substances, which can promote the body's metabolism and maintain the body's acid-base balance. Therefore, the deep well solar salt has more comprehensive nutritional value, is more beneficial to the health of the body, and can help balance the various trace elements required by the human body. In addition, the deep well solar salt production process is pure and does not contain any artificial additives and chemical components.

[0039] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0040] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The deep well solar salt production process disclosed in the present invention is characterized in that: Mainly include: the following steps: S1. Extraction of brine: Use a high-power, high-lift submersible pump to extract underground brine from a well at least 200 meters deep; S2, Filtration: The extracted brine is transported to the filtration tank through a pipeline, and impurities are removed using multi-stage filtration media; S3, brine preparation: the filtered brine is directed to the evaporation pond step by step, filtered and evaporated to obtain intermediate brine, and then the water in the underground brine is gradually evaporated, the salt concentration gradually increases, and saturated brine is formed and transferred to the brine preservation pond for storage; S4, crystallization: pouring saturated brine into the crystallization pool and continuing to sun-dry, so that the brine naturally crystallizes into salt, and through further filtration and evaporation, the salt in the brine is precipitated in solid form to form salt crystals; S5, salt formation: When the salt in the crystallization pool is precipitated, the used brine needs to be withdrawn and new saturated brine is injected to crystallize into salt; S6, collecting salt and collecting lumps: collecting the salt crystallized in the crystallization pool and transporting it to the lumps platform; S7. Brine: After the sun-dried salt is piled up on the platform, it is naturally stored for more than 2 months to allow the brine in the salt to naturally leak out.

2. The deep well solar salt production process according to claim 1, characterized in that: The filtration pool adopts a multi-layer filtration structure, including but not limited to a sand layer, an activated carbon layer and a fine filtration layer.

3. The deep well solar salt production process according to claim 1, characterized in that: The filtered brine is guided to the evaporation pond step by step, and the principle of natural evaporation by sunlight and wind is used to gradually evaporate the water in the underground brine, and the salt concentration gradually increases to form saturated brine.

4. The deep well solar salt production process according to claim 1, characterized in that: The high-power and high-lift submersible pump has a power of at least 30 kilowatts and has a pump body and sealing elements made of corrosion-resistant materials.

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