After visiting the third layer, Zhu Cijiong's heart was full of expectations, because the extract of the third layer was already in a liquid state, and the next thing should be fuel, fuel is the focus of future development, if there is fuel, the internal combustion engine is hopeful, with the internal combustion engine, the speed of trains and ships will be improved by leaps and bounds, and the car will no longer be a dream!

With excitement, Zhu Cijiong quickly climbed the steps leading to the fourth floor, and he couldn't wait to see if Song Yingxing had really refined diesel, kerosene, and gasoline.

The temperature of the fourth layer is a little lower than that of the third, it has dropped to a level that ordinary people can bear, and the air is still full of moisture.

This layer is similar to the first three floors in appearance, there is still a blast furnace in the middle, unlike a blast furnace, the room is not like a behemoth in the room, and it is also a hole like a door opening leading to the inside, and there are also two people standing next to the mouth, it seems that this outer layer is used for heat insulation, Song Yingxing didn't put too much thought into it, so it looks the same.

So what's it like inside? Zhu Cijiong curiously put his head into the door hole and looked at it, it turned out to be a huge iron can, but this iron can was already a bit similar to a common boiler, but it was much larger.

Feeling the humidity in the air, Zhu Cijiong turned around and asked, "Is this layer heated with steam?" “

Song Yingxing nodded and said: "Yes, Your Majesty, because the things refined at the beginning were too easy to catch fire, after many experiments by Weichen, he felt that it was safer to use steam heating, so he added a steam tank between the oil storage tank and the coal fire, first heated the steam with the coal fire, and then used the steam to heat the oil." “

Really smart, fuel is flammable and explosive, it is indeed too dangerous to heat it directly with fire, and the steam in the compartment is safe, judging from Song Yingxing's description, from this layer, the refined should be fuel, Zhu Cijiong couldn't wait to say: "What about the refined things in this layer?" Take a look. “

When Song Yingxing heard this, he hurriedly asked the person on duty on this floor to go to the storage room to get it.

Soon, the guards on this floor brought over an iron drum, which was obviously liquid, presumably fuel.

Zhu Cijiong took a closer look, the gray was black, a bit like heavy oil, he dipped it a little more, put it in front of his nose and sniffed it carefully, it turned out to be the smell of diesel!

He understood that this should be a mixture of heavy oil and diesel.

Heavy oil is generally used in large generator sets and large ocean-going ships, which need to be heated before it can be used, while diesel can be used in ordinary trains, cars and small ships, and can be used at room temperature.

Looking at Song Yingxing's longing eyes, Zhu Cijiong sorted out his thoughts, and then said: "This oil is not pure, it must be separated again, separated into two oils, one is slightly yellow, as transparent as vegetable oil, called diesel, and the rest is slightly black, and the sticky one is called heavy oil." You can send diesel fuel directly to Wang Zheng and ask him to study new car power, and if you want heavy oil, you can send it to Xu Fuyuan and Xia Yunyi to see if they can make a bigger generator. “

When Song Yingxing heard this, he was excited, he finally understood the purpose of the emperor asking him to study oil refining, these things are too useful to refine, just like the steam engine, it is the foundation of other walks of life, it is a great honor to be able to engage in such important research, he nodded heavily and said: "Weichen understands." “

Zhu Cijiong nodded, took the lead on the steps, and walked towards the fifth floor.

Before I reached the fifth floor, a strong smell of kerosene came to my face.

Kerosene, definitely kerosene, Zhu Cijiong couldn't help but speed up his pace and walked towards the fifth floor.

The temperature of the fifth floor is much lower than that of the fourth floor, and the air is still damp, no need to ask, Song Yingxing uses steam heating.

Needless to say, the shape in the middle of the five layers is the same as the first four layers, but there is a big difference inside, except for a large iron can, there is a small iron can next to it connected to the large iron can with a tube, the height difference, it feels like distilled spirit.

This time, Zhu Cijiong felt that the temperature inside was not very high, and he wanted to go in and have a look, but as soon as he wanted to walk in, the two people who were in the first door reached out to stump him and looked at Song Yingxing in embarrassment.

Seeing this, the Jinyi guards and the masters of the East Factory on both sides pressed their hands to the handle of the knife, as long as the emperor opened his mouth, they would cut people!

Zhu Cijiong looked back at Song Yingxing inexplicably, can't you just go in here?

Song Yingxing didn't know if it was hot or what, a lot of it burst out on his forehead, and he explained in a panic: "The emperor is angry, it's very dangerous here, Weichen has stipulated that those who have not been trained are not allowed to enter." “

When Zhu Cijiong heard this, he immediately shrank back, not that he was afraid of danger, but mainly to comply with the rules of this experimental field, he knew that many experiments were very dangerous, if he didn't come according to the regulations, he would die, and at worst, it would be possible to destroy the entire experimental field.

However, he really couldn't see any danger in this, and he couldn't help but ask curiously: "Isn't this just a hot spot, what's the danger?" “

Song Yingxing saw that the emperor had shrunk back, so he sighed and carefully explained: "Your Majesty, it is indeed very dangerous here, because the steam in it is not ordinary steam, when the experiment was to refine oil, there were several accidents with direct heating, and several people were burned, so Weichen thought about using steam to heat the oil first." However, after many experiments, Weichen found that if the steam is burned open, the temperature can't go up, and then Wechen seals the steam and continues to burn, so that the temperature can rise. “

Zhu Cijiong didn't understand even more, isn't it just the high temperature, he asked puzzledly: "Isn't it okay if you don't touch it, there are other dangers?" “

Song Yingxing nodded in fear and said: "Yes, when I first started the experiment to seal and heat the steam, the jar was not sealed, and the steam was heated for a while and then it sprayed out of a crack, directly squirting off a person's hand!" Therefore, Weichen stipulated that idle people and others were not allowed to enter the place where the steam was sealed and heated. “

Zhu Cijiong was startled when he heard this, and then he realized that it was high-pressure steam, and that thing was indeed very dangerous, he nodded and said: "Well, you are right to do this, I won't go in, take a look at the things that have been refined from this layer." “

When Song Yingxing heard this, he gave an order, and the guards on this floor quickly moved a porcelain jar, which seemed to be a jar for wine!

Zhu Cijiong said in surprise: "Is this to prevent volatilization?" “

When Song Yingxing heard this, he was also quite surprised: "Volatilization? The emperor's words are really wonderful, indeed, if it is open, it will go down in a few days, and it should be volatile, so Weichen asked people to seal it with a wine jar. “

Zhu Cijiong heard this, nodded, stepped forward directly to take the sandbag pressed on the altar, and sniffed it gently, sure enough, it was kerosene, and the kerosene in it was relatively clear.