Haiyan No.2 Senior Middle School quietly entered the sacred garden of Haiyan education-Old Haiyan Middle School, and began to run schools independently, depicting the scenery of Haiyan ordinary high school education.

Sea salt is a kind of edible salt, which is made by introducing seawater into the salt field and evaporating in the sun. Characterized in that no anti-caking agent is added.

The collection of sea salt is more complicated than other salts, which can retain more trace elements in seawater, instantly stimulate and retain the original flavor of ingredients, and make them fresh, salty and delicious. It is mainly divided into crude salt, refined salt and flake salt, which are refined by seawater evaporation. The production process of sea salt is complex, the production cycle is long, the production cost is high, and the taste and quality are good. The quality of sea salt varies from place to place. Hangu Salt Field is located at east longitude117-118 and 39 north latitude. This is the gold producing area of sea salt, which is suitable for drying high-quality sea salt.

Manufacturing process:

The production of sea salt in China generally adopts the solarization method, also known as the "beach solarization method", that is, the coastal beach is used to build a dam to open up a salt field, and the seawater is attracted to fill the pond by absorbing moisture, which is evaporated by the sun and turned into brine. When the concentration of brine evaporates to 25 Baume degrees, sodium chloride precipitates out, which is the original salt. The process of producing crude salt by solarization is generally divided into four processes: absorbing moisture, making brine, crystallizing and collecting salt.

Nachao

It uses tidal movement to extract salt-making raw materials when pushing high salinity seawater from the sea surface to the offshore. There are two methods of tidal absorption, one is natural tidal absorption, and the other is dynamic tidal absorption. Natural tide absorption is to let seawater flow naturally along the tidal channel at high tide; Axial flow pump is generally used to introduce seawater for dynamic moisture absorption, and its characteristic is not limited by natural conditions.

Salt water preparation

Salt water production is carried out in a huge evaporation pool. According to the daily evaporation, the water depth of the evaporation pool is properly controlled, so that the salt water concentration gradually increases and finally condenses into saturated salt water.

transparent

In the process of continuous evaporation and concentration of seawater, the concentration of various salts is increasing. When the salt concentration reaches saturation, the salt will precipitate in the form of crystals, and the crystals can continue to grow by maintaining the supersaturated state of the solution in the supersaturated solution.