Production method of natural seaweed iodine low-sodium salt exposed to sunlight in solar greenhouse
A technology for solar greenhouses and production methods, applied in alkali metal chlorides, food preparation, food science, etc., can solve problems such as high energy consumption and processing costs, difficulties in solid mixtures, non-compliance, etc., and achieve production conditions and a hygienic environment Improve and speed up the concentration and crystallization process, and reduce the effect of dependence
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example 1
[0052] In this example, the seaweed is soaked in pure fresh brine with seawater brine density of 18°Be-20°Be, that is, unsaturated intermediate brine, and then crushed, the filtrate is collected, and the filter residue is also collected after repeated soaking. The obtained brine has a density of 32° Be's seawater and old brine are blended in the adjustment tank according to the ratio of 4:6, that is, 40% of the pure new brine and 60% of the old brine are blended, and then the blended brine is put into the evaporation pool for evaporation and concentration. When the brine reaches 26 ° Be supersaturated, put it into the crystallization pond of the greenhouse after filtering, the depth of filling the pond reaches 3cm, and the crystallization cycle is 5 days. The produced low-sodium salt has a particle size of 2-4cm, a whiteness of ≥80%, and a light transmittance of over 90%. According to laboratory analysis, the content of sodium chloride is 65.72%, magnesium chloride is 1.87%, m...
example 2
[0054] In this example, enteromorpha is soaked in pure new brine with a seawater density of 25Be, that is, saturated brine, and then mashed, the filtrate is collected, and the filter residue is also collected after repeated soaking. The ratio of : 7 is put into the adjustment pool for blending, after adjustment and fusion, it is filtered and put into the greenhouse crystallization pool for drying. The crystallization period is 3 days. The particle size of the produced low-sodium salt is controlled at 2-4mm, the whiteness is ≥80%, and the light transmittance is 90%. After drying and analysis, the sodium chloride content is 88.21%, of which the trace element magnesium chloride is 1.688%, and magnesium sulfate is 2.177%. %, calcium sulfate 0.448%, sulfate ion content 0.46%, fully in line with the standard of low sodium salt, iodine content 31.080mg / kg, reaching the national edible salt iodine content standard. The yield per acre also reached about 0.023 tons.
example 3
[0056] In this example, enteromorpha is soaked with a well mine brine density of 25 ° Be pure new brine and crushed, the filtrate is collected, and the filter residue is also collected after repeated soaking. Blending, because the well mine brine has been removed from impurities such as sulfate radicals and sodium sulfate, and the sodium content is relatively high. Therefore, when blending, the pure new brine accounts for 2.5% and the sea brine is blended in a ratio of 7.5%. After precipitation and fusion, the brine The visibility is above 20cm. After being filtered, it is put into the crystallization tank for drying. The crystallization cycle is 4 days. The produced low-sodium salt particles are 2-4mm. After dry chemical analysis, the content of sodium chloride is 86.66%, magnesium chloride 2.202%, sulfuric acid Magnesium 2.387%, calcium sulfate 0.153%, sulfate ion content 0.46%, iodine content 24.908mg / kg, reaching the national edible salt iodine content standard. The low-so...
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