In order to facilitate the filling of seawater, they cut another bottle of pure water and made a funnel out of the half side with the mouth of the bottle.

Finally, of course, it is the water connection device, that is, the container that is finally used to connect the condensed distilled water, this is not very particular, as long as it is a container, it does not need to be very large, anyway, one can be replaced with another one immediately when it is full.

After some further tuning, the simple distillation unit was finally formed.

Everyone first took off the paint bucket, opened the lid and filled it with as clean and sediment-free seawater as possible, in fact, it was not completely full, about 70% of the total capacity of the paint bucket, and then re-closed the lid, added it to the bracket, connected it to the reed bamboo pipe, and then used the firewood prepared before to heat it.

"Everyone should pay attention to the control of the fire, and when it boils, the fire must be weakened, otherwise a large amount of water vapor will be generated in it for a short time, and it is impossible for the small nozzle to be completely discharged, which may explode, and the lid of the barrel will fly directly." Fang Jinyan reminded everyone.

His hands-on ability is very strong, when he made this set of devices before, he did a lot of difficult work, such as the connection between the paint bucket and the nozzle.

"Brother, I guess you must have worked on an assembly line before, right?" Jiang erected the big sow and said admiringly.

"I've been working for a summer job before." Fang Jinyan said with a smile. It wasn't a lie, he had been, but by answering that, he was clearly deliberately misleading

"I'll just say, as long as you have worked in the assembly line of a Chinese factory, you have such fast and skillful hands." Jiang was very proud. Bragging up, he said, "I've seen a master in an electrical appliance factory before. His hands, tsk. It should be much better than you! ”

Fang Jinyan just smiled, although he didn't think that there was anyone in this world who could be stronger than himself.

"How much fresh water can be distilled from this bucket of seawater, and how much salt can be obtained?" Zhou Rong, the girl who was watching, asked.

"You can roughly figure it out." Liu Hongjun pointed to the word "151" on the paint bucket and said, "The volume of this paint bucket is 1o liters, according to 7o%, that is, we count it as 11 kilograms, and the salt content of seawater is about 35 parts per thousand." Multiply, well, we can get about 4oo grams of table salt, distilled water, depending on the condensation effect, theoretically we can get more than 1o kilograms, but if the condensation effect is not good, maybe not a kilogram. ”

Fang Jinyan added: "What Captain Liu said is basically right, but he may have overestimated the amount of salt that can be obtained. Because not all of the salts in seawater are sodium chloride, there are also other salts such as magnesium chloride, which will eventually remain in the form of brine. Moreover, in the brine, there will also be a part of sodium chloride that has not been precipitated, so it is actually good to get 3oo grams of table salt. ”

"Wait a minute. I don't understand, what is brine? Zhou Rong was confused.

"It's just heating to the end. Residual high-concentration salt solution. Fang Jinyan explained.

"Isn't boiling salt just boiling dry? How do you get salt without boiling it dry? Zhou Rong was even more confused.

"yes, I thought it was going to be burned. Isn't that so? Many others chimed in.

"Of course, if you don't burn it directly, there will be a lot of magnesium salt and potassium salt in it, and the taste will be very bitter, and eating too much will also be harmful to the human body." Fang Jinyan shook his head and said.

"But if you don't boil it dry, how does the salt come out?" Some people still don't understand it.

"Because all salts have a certain solubility, when the water is steamed to a certain extent, it becomes a saturated solution, the water continues to decrease, the salt will precipitate, precipitate, and so on, the brine and the precipitate can be separated to obtain the coarse salt whose main component is sodium chloride." Fang Jinyan said.

"Why is it that only sodium chloride is precipitated, and the rest of the salt is not left in the brine?" Zhou Rong still didn't understand.

"Because the content of sodium chloride in seawater accounts for 90% of all salt, and the other salts are relatively much less, so the water is constantly steaming, and it must be the sodium chloride that first reaches the saturated state and precipitates." Fang Jinyan continued to explain.

"Oh, so that's the case" Zhou Rong seemed to understand, nodded suddenly, and suddenly said again, "Okay, in fact, I still don't understand, what is solubility?" What is Saturation? Why does only sodium chloride precipitate when it reaches saturation? ”

Rao is extremely patient Fang Jinyan, and now he is completely speechless.

At this time, the water in the paint bucket began to move.

Soon, a large amount of water vapor enters the reed bamboo pipe, passes through the guò condensing device, condenses into water, and then drip down the pipe wall, little by little, and drip in a clean milk powder can, ticking and ticking!

"It worked! It worked! Countless people cheered in unison.

Fang Jinyan looked at the mouth of the pipe and saw that there was still a large amount of air flowing out, and frowned slightly.

"The condensation effect is not very good, I am afraid that a lot of water vapor will not be able to condense and escape." He said.

"There's no way around it, our equipment is so rudimentary, it's nice to be able to get some distilled water." Liu Hongjun said with satisfaction.

"yes, it's a big deal if we burn it a few more times." Yang Jian also said.

"It's too expensive, just now we burned at least dozens of kilograms of firewood, and the cost performance is too low." Zhao Lan said.

"So this method is a temporary countermeasure, and we still have to find a natural source of fresh water." Liu Hongjun nodded and said.

"But if we don't, how can we get salt in the future?" Jiang actually feels that this is very emotional, and the fresh water he has made has a special sense of achievement

"Table salt can be dried in almost the same way, which is also to dry into a saturated solution, and then form brine and coarse salt and then separate." Fang Jinyan said as he tried a few pure water bottles as condensation devices, and now they have begun to burn.

"The temperature of the condensate is too high, replace it immediately."

As he spoke, he and a few boys immediately started to release the hot seawater from the pure water bottle, and then refill it with the low-temperature seawater.

After that, they repeated this procedure several times.

Fang Jinyan had been listening to the sound of boiling water inside, controlling the fire.

"It's almost time to turn off the fire, and if you burn it again, it's going to dry." He said suddenly.

"How do you know?" Someone asked in confusion.

"You can hear it when you listen to the voice." Fang Jinyan replied.

"I can't hear it"

Although some people expressed doubts, they had no other means to judge, and they could only listen to Fang Jinyan's instructions

If it does dry up, the salt they crave so much will be lost.

Although seawater is salty, it is bitter because it has a lot of magnesium and potassium salts, and cannot be used as salt to cook food.

Although coarse salt will have some impurities left more or less due to the separation technology, it is much better than seawater.

"That one is hot now, we'll deal with it when it cools down, let's deal with the distilled water first." Liu Hongjun was afraid that someone would be anxious, so he reminded.

They didn't get much distilled water, just a milk powder can and seven or eight large and small bottles.

"It's about 5 kilograms, which is better than I thought." Liu Hongjun said with satisfaction.

"It's a pity that we have more than 1oo people, and on average, each person can only get one or two, which is really a drop in the bucket." Zhao Lan shook her head and said.

"Don't we have something else to rehydrate, and then we burn it a few more times, and we should be able to barely hold on for a while until we find a freshwater stream or lake on the island," Mr. Liu said optimistically.

"yes, I'm afraid this little salt won't be enough for us to eat, so we'll have to burn it a few more times." Hu Yong agreed.

They were right, and they couldn't wait to open the tin paint bucket when it cooled down a bit.

Sure enough, as Fang Jinyan expected, there was only less than one percent of the high-concentration brine left in it, and at the bottom of the container, there was obviously a layer of white crystal precipitation and precipitation.

That's table salt, which is sodium chloride!

Because brine is liquid and salt is a solid precipitate, it is not too difficult to separate, and it can be filtered with a piece of gauze with a sandwich.

So they got about 25o grams of coarse salt and 2 kilograms of brine.

Looking at the crystals that are not particularly white because of the impurities, everyone has a sense of accomplishment.

They had heard a few about the method of making salt for a long time, but this was the first time that it was actually made.

After all, in the past, you could buy very good quality and iodized refined salt for a few dollars in the city, and who was so idle that they made coarse salt by themselves.

"Can this thing be used to make braised vegetables? Is it really inedible? Someone asked, pointing to the brine left in the bucket.

"Do you have common sense? The pickled vegetables are made with marinade, mainly prepared with various spices and seasonings, which is completely different from this salt marinade, if you dare to use this to make marinated vegetables, you will wait to be sent to the hospital" Jiang said angrily.

"Yes, salt brine has a strong irritating effect on the skin and mucous membranes, and has an inhibitory effect on the central nervous system, so it cannot be eaten directly, if you accidentally take it by mistake, you will feel nausea and vomiting, dizziness, headache, rash, etc., and even shock and even death, but this thing can be used to order tofu." Fang Jinyan added.

The reason why he spoke so professionally and clearly was entirely because he had read the information before and had written it down.

"Brine tofu, one thing down one thing, I've heard of this!" Someone immediately remembered to say. (To be continued......)

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