Ancient promotion routine

In addition to sodium perchloride, the salt dug out of the Pingdingshan salt bed also contains potassium chloride and magnesium chloride.The solubility of magnesium chloride is much greater than that of sodium chloride and potassium chloride. Just add a little water and filter to completely wash away the magnesium chloride.

Furthermore, below 27 degrees Celsius, the solubility of potassium chloride is much greater than that of sodium chloride.In this way, the difference in solubility can be used to dissolve sodium chloride in water and then filter to obtain relatively pure sodium chloride.

After these things are filtered out, membrane dialysis, which is the electro-osmosis method, is used to remove anions and cations using membrane technology to obtain pure brine.

This is where Zhang Yanjin is worried, because it is difficult to produce such things as microporous membranes with modern technology.More importantly, the microporous membrane area required in industrial production is very large, otherwise it is difficult to support the production of a large amount of salt, which makes the difficulty even higher.

After all, microporous membranes are already at the level of organic polymers, and with his half-baked technology, it is impossible to make microporous membranes.

After much thought, Zhang Yanjin has decided to abandon the use of microporous membranes for membrane filtration to make salt. After all, the production process of microporous membranes has reached the nanometer level, which was impossible in the Great Wei Dynasty.

Therefore, Zhang Yanjin decided to take a step back and adopt another method.Pingdingshan can't grow food all year round, so there are very few people living here, and a lot of land is left unused.

They can use these lands to clean and purify the salt bed, dry the salt to crystallize, purify, recrystallize, and repeat the method many times.

Even so, it is much purer than the salt extracted by the current technique of pan frying and scraping salt.

In order to control the lifeline of the economy and develop the economy, the Wei court followed the method of the previous dynasty and implemented the salt industry monopoly system.Anyone who makes salt, with the government's permission to register his household registration, is called "Tinghu". All the salt made by Tinghu is bought by the government and sold to the people.

The current Tinghu is the Duke of Rui Zhou Qin's family, and the Tinghu in various places are also derived from their families.

If the industrial chain of selling salt in the Great Wei Dynasty is a pyramid, then the Zhou family is the second layer at the top of the pyramid, the imperial court is the first layer, and the common people are the bottom layer.

But later, the economy of the Great Wei Dynasty developed, and after the decline of the Zhou family, the emperor at that time authorized Liu Yan, the salt and iron envoy at that time, to further change the salt law, set up supervisors in the salt-producing areas, and supervise the salt households. Produce by yourself, add salt tax to the salt price and sell to merchants, and allow merchants to transport and sell to increase fiscal revenue.

In the first year of implementation, the court’s income increased by 40 guan, and later even increased to 600 million guan, which can be said to be a considerable benefit.

This is why Zhang Yanjin must mine the salt bed under Pingdingshan.

After determining the method, Zhang Yanjin began to arrange people to build salt-drying ponds under Pingdingshan. The most valuable thing in this era is land, so it doesn't matter how much area he occupies.

After discussing with Huang Xiujun, Yuwen Shangkai, and Chen Su, Zhang Yanjin simply built this place into the first salt factory in the Great Wei Dynasty.

Perhaps it was Zhang Yanjin who dug out the salt mine under Pingdingshan, and completely crushed Huang Xiujun and Yuwen Shangkai in the field they were good at. Now they worship Zhang Yanjin even more.

At this time, I heard that Zhang Yanjin was going to build a salt drying pool, and regardless of whether the drying of the salt was in line with the current technique of scraping salt in a frying pan, I directly agreed with what Zhang Yanjin said, and was happy to see the success of the construction of the salt factory. I am also willing to be responsible for the composition of the design shape and drainage pipes.

The construction of the salt pond was quickly put on the agenda, because everyone saw the huge benefits that the salt mine could bring, and in the reconstruction of Zhongzhou, all places were full of waste, except for Maojian in Nanyang and Xinyang, the production of salt It can be said to be the fastest way to bring huge profits.

After the four of them discussed, they immediately made a decision, that is, to put aside the construction in other places for the time being, and build the salt factory.

Yuwen Shangkai and Huang Xiujun put down their respective project plans, and first planned the layout of the salt factory and the drainage and water pipelines.

Chen Su was responsible for the calculation of the funds required for the construction of the salt factory, as well as the income that would be brought to Zhongzhou and the taxes paid to the court after the construction was completed and put into planning.

Zhang Yanjin mobilized the workers from Xiangshan who were in charge of the Peony Flower Garden to start building the salt drying pond.

In less than ten days, Huang Xiujun and Yuwen Shangkai planned the construction drawings of the salt factory and handed them over to the workers of the Xiangshan Gang for construction.

In the eyes of ordinary people in Zhongzhou, the salt factory can be said to be the place of gold. This kind of recognition makes them full of enthusiasm, and it can be said that they are united for a while.

After a month of hard work, the salt factory built with red bricks was located at the foot of Pingdingshan, and it became the pride of the people in Zhongzhou.

Apart from working as a supervisor, Zhang Yanjin has not been idle during this period of time. He knows that once the salt factory is successfully built, it can be put into production, and the various tools needed for it will also be in place as soon as possible during this period of time. Only in this way , to shorten the time required.

There are not many tools needed for drying salt ponds, and the process of drying salt, evaporating, and recrystallizing does not require much manpower, but the final process of adding iodine is different.

Adding iodine needs to adopt the method of adding iodine by spraying. The first thing that is needed is an extremely fine nozzle, and the second is to solve the power problem during eruption.

Simply put, the craftsmen of the Xiangshan Gang with the most exquisite craftsmanship in the Wei Dynasty were here, and the extremely fine nozzles were not difficult to make. After Zhang Yanjin drew the pipes and nozzles, he handed them over to them.In less than a few days, the craftsmen of the Xiangshan Gang made a very strong copper nozzle after pondering and experimenting a few times.

The rest is the motivation problem that Zhang Yanjin has to solve.

The method of spraying iodine is first to prepare a certain concentration of iodine solution, and then transport the iodine solution into the pipeline, and when the iodine solution reaches the nozzle, squeeze the iodine solution out with great power. Under the high pressure, the iodine solution is squeezed, passes through the fine and dense holes in the nozzle, and will be transformed into an aerosol.

The aerosol enters the salt pool and evenly covers the table salt to achieve fine and uniform iodized table salt. Modern iodized table salt is made by this method.

The power problem is different from polymer film technology. Zhang Yanjin, after thinking back and forth, found that the power problem can be solved by the Great Wei Dynasty. Although it is impossible to reach the high level of modern technology, it can still be achieved by providing a certain power to the nozzle. of.

After all, at the beginning of the development of industrial society, coal was used to drive steam engines, and steam was used as power to drive various machinery to work.

Since the capitalist countries such as Britain and France at that time could achieve it, why couldn't he achieve it?

Zhang Yanjin carefully recalled the principles of the steam engine he learned at the beginning, and drew dozens of design drawings. After comparing and thinking, he picked out a few of the design drawings and handed them to the craftsman he brought over. They built the machine pictured above according to the diagram.

If the workers of the Xiangshan Gang are the leaders in the construction industry of this era, then Zhang Yanjin can confidently guarantee that the group of craftsmen under him must be the leaders of the industrial manufacturing craftsmen of this era.

Even if he improves the purity of the salt, some people may still use less pure salt, but once he adds iodine to the salt, no one will make do with it.

At that time, after he packs it again, he can sell it all over the place and become the leader in the salt industry.

Looking at the salt factory standing quietly in the sun, Zhang Yanjin was full of thoughts.

The salt factory has just been made, and it needs to be dried for a few days before it can be put into use.

The craftsmen under him have already begun to make steam engines, and they should be able to carry out experiments on their use tomorrow. After they are fully determined, the salt factory is also ready to dry, and then the production of iodized salt can be carried out.

Zhang Yanjin is happy to see the success of the salt production, after all, he can get huge benefits from it.But it was precisely because the benefits were so huge that he was a little worried.

Once the salt factory is put into production and sold, it will attract the coveted eyes of countless people, just like the red brick factory he built at the beginning.

So at that time, would he still hand over the fat he got to the court?He really didn't want to. You must know that when the Red Brick Factory was handed over to the emperor by his uncle Zhang Zhongqian, he was in pain for several days.

Back at night, Zhang Yanjin paced back and forth in the room, still thinking about this matter.

With a glance, he saw the three bold characters of Liu Junyi written on the envelope placed on the case table.He had something on his mind, so when Zhang Wuer said that Liu Junyi had sent a letter, he was not in the mood to read it, so he asked Zhang Wuer to put it on the table first.

But now his mood is quite different from that in the afternoon.

Since he is going to make salt now, why not let the salt-making fields bloom everywhere?This can not only distract everyone's attention, but also reduce some of Zhou Qin's firepower on himself, right?

At that time, there will be salt factories everywhere, even if Zhou Qin doesn't want to, can he still be an enemy of the world?