Although the experiment of the ditch beach salt drying method was successful, Chi Fei did not immediately promote it in the major salt works.

Until he found enough credible salt workers, Chi Fei did not plan to promote this method in other salt farms to avoid leaking secrets.

Due to the construction of so many filters at once, the sons of the Ning family, who originally served as salt workers, suddenly appeared to be seriously understaffed.

In order to solve the problem of lack of manpower, Ning Yabai could only inform his father who was far away in the northwest through the flying pigeon, asking him to send more credible people to serve as salt workers.

When Ning Zhiyuan learned of this, he was overjoyed. More than 100 military households were immediately dispatched, totaling more than 500 people, to Jiujiang in batches by horse-drawn carriage.

On the other hand, Ning Yabai began to expropriate a large number of unowned beaches suitable for salt drying as government land, and also built a large fence around the pond to prevent others from entering.

At the same time, all the local craftsmen were invited to build a large number of filter ponds on these beaches, ready to expand production.

Because riding a horse-drawn carriage is much slower than riding a horse, when these more than 500 people arrived in Jiujiang from the northwest one after another after more than two months, Ning Yabai had already built five salt farms on various local beaches in one go, with an average of hundreds of filter ponds in each salt field.

These salt works are not only uniformly protected by walls, but also surrounded by soldiers, and are heavily guarded. Anyone who trespasses without permission will be killed.

Just as Ning Yabai was building a salt pan on a large scale, Chi unofficially began to study the salt field method.

The salt pan method is mainly divided into two parts: evaporation pond and crystallization pond.

First, salters introduce seawater through a ditch into an evaporation pond to reduce the amount of water in the evaporation pond.

When the seawater in the evaporation pond is evaporated to a certain extent, it becomes a saturated solution full of salt.

At this time, these saturated solutions are poured into the crystallization pond and continue to be exposed to the sun until the water has completely evaporated, and the crystals produced at this time are the most common coarse salts.

This method sounds simple, but the most important thing is the word "sun".

Therefore, the Yantian method must be implemented in a place with a mild climate, abundant sunshine and flat terrain.

This condition is not easy to meet, the first condition must be the coastal area, and the second is that the sunshine must be sufficient, and the climate must be less rainy and dry. Indispensable.

However, the coastal areas are affected by ocean currents, which are generally humid and rainy, prone to typhoons or monsoon weather, so many coastal areas are not suitable for salt drying.

As for whether it is suitable for drying salt here, Chi Fei has no bottom in his heart, so he can only try it first.

The first is to dig rows of evaporation ponds about four or five hundred meters from the coast. Aqueducts are then dug in the direction of the sea to bring in seawater.

This step is basically the same as the steps for building a reservoir in the ditch beach salt drying method.

It's just that the number of evaporation ponds is much more than that of reservoirs, one after the other, forming dense salt pans.

The area of each reservoir is about one acre, and the depth varies from shallow to shallower the further back.

The deepest level of the evaporation pond reaches the adult knee section, and then snuggles down backwards. By the time we get to the last evaporation pond, the water level is only up to the ankle of an adult.

The front and back sides are separated by wooden planks supplemented with mud to make it easier for the salters to push the sea water into the next pool.

Although the salt pan method is divided into two parts, evaporation ponds and crystallization ponds, in fact, the evaporation ponds are the largest, accounting for more than ninety percent of the salt pans. The crystallization pool is less than one percent.

The reason why there are so many evaporation ponds is because the evaporation of seawater is not simply done in one pool, but is evaporated separately according to the different concentrations of seawater.

For example, the salinity of seawater that has just been brought in from the sea is generally only 3.5%, that is, the salt content of each kilogram of seawater is about 35 grams. This pristine seawater can only be placed in the evaporation pond at the front.

After a period of sunbathing, when the salinity of the seawater rises to about 10%, it is necessary to move the seawater from the front evaporation pond to the next evaporation pond.

After re-evaporation, when the salinity of the seawater rises from 10% to about 20%, the seawater is moved back again to the next level of evaporation pond.

When the salinity of the seawater rises to 25%, the seawater can be called brine. At this point, the brine needs to be moved to the crystallization tank and wait for the final crystallization process.

And so on, according to the different salinity of the sea water into different evaporation ponds, until the final crystallization, so that the sea salt can be continuously produced.

As for how to distinguish the salinity of the seawater in each pool, in the absence of modern professional measuring instruments, it is only up to the salt workers to judge through the experience of the color and taste of the seawater.

It is precisely because the evaporation part is so complex that the number of evaporation ponds accounts for more than 9% of all salt pans.

In order to prevent the salts in the brine from clumping together, the salt workers need to use a wooden push several times a day to constantly turn the brine in the crystallization pool, which is called spinning salt.

Through this back and forth, the condensed sea salt is not only whiter in color, but also much finer in particles.

As an ordinary otaku who lived in the city in his previous life, it is naturally impossible for Shiota Faike to really have the opportunity to try.

He just watched relevant videos and materials from the Internet in order to write online articles, so he actually didn't know much about this salt making method, so he could only find out how to solve it by himself.

When there is a problem, it immediately stops and thinks about how to solve it.

After staying like this for more than ten days, he was soon quite white and half black, which made Ah Zhi feel very distressed.

That night, Ah Zhi hugged Chi Fei's neck and complained, "Brother, don't you wear a hat during the day?" Look at what you've done. ”

"It's okay, I'll be back after a while. And it's good for men to be darker and look manly. ”

"No, my brother's original appearance is already very good. Why don't you let me go out with you from tomorrow? So that I can at least take care of you by your side. ”

"Fool, the salt works are full of men, and they often don't even wear clothes when it's hot, how convenient are you in the past."

"But you're so busy every day, and I can't help with anything, I feel like I'm too useless." Ah Zhi said aggrieved.

"How could Ah Zhi be useless, I had a hard day outside, and when I got home, not only did I have a hot meal, but Ah Zhi was caring for me and taking care of me, so that I could do things well with energy.

So Ah Zhi is not useless, it's just that we have a different division of labor. Isn't it nice that I'm working outside the home and you're in charge of taking care of the house? ”

"But ......"

Chi Fei didn't let her continue, lowered his head and kissed her little mouth and kissed her slowly.

Ah Zhi was stunned for a moment, and then let him come with a hot body.

Chi Fei originally just wanted to shut her mouth and prevent her from talking any more, but after being teased by this girl, her lust was ignited all of a sudden, and she began to seriously "bully" her.

After coming to Jiujiang for so long, he has been busy experimenting with how to make salt, and he has long been a little hungry and thirsty.

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