Salt drying method of seawater salt drying

Seawater → evaporation pool → crystallization pool → raw salt and mother liquor.

At present, the main method of extracting salt from seawater is "salt field method", which is an ancient and widely used method. In this way. In areas with mild climate and abundant sunshine, choose a large area of flat beaches and build salt pans.

Yantian is generally divided into evaporation pool and crystallization pool. First, seawater is introduced into the evaporation pool. When the evaporated water reaches a certain level in the sun, it is poured into the crystallization pool. Then the seawater will become a saturated solution of salt, and then the salt will gradually precipitate out in the sun. The crystal produced is our common crude salt. The remaining liquid is called mother liquor, from which various chemical raw materials can be extracted.

The ancient coastal residents in China used seawater to make salt, introduced seawater into the salt field, concentrated seawater through the evaporation of sunlight and wind, and further crystallized the salt. This method is chemically called evaporative crystallization.

Extended data:

The invention of salt drying in seawater;

According to the scholars in Song Dynasty and Ming Dynasty, "Heavenly nature creates things. "Salt Making Five" records: "Haifeng directly introduces seawater into the pool to bask in the sun, and does not add manpower to sweep food when it condenses. Same as salt dissolution. But the time of salt formation is very different from not borrowing the south wind. "

Haifeng in this record refers to Wudi County, Shandong Province in the Ming Dynasty. The name Emperor Wu first appeared in Zuo Zhuan in the Spring and Autumn Period, and was renamed Haifeng in the early Ming Dynasty for avoiding Judy, the founding emperor of the Ming Dynasty.

19 14 years, and the name of Fu Wudi was restored. Among them, "salt dissolution" refers to the salt produced by the dissolution pool in Xiezhou, Shanxi. The quality of "salt solution" ranked first in the country at that time and belonged to "tribute salt". The drying quality of Wudi Beach is the same as that of Hongyan in Xiezhou City, which shows Wudi's salt-making level.

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