The biogas lantern made by Luo Yong and the others looks just like an ordinary lantern at first glance.
If you lift the lantern cover and take a closer look, you will find that there is a mesh gauze cover between the wick and the lampshade. , this mesh is the key to the biogas lamp.
This mesh is made of fine and tough twine, and then a layer of thorium oxide is applied to the outside of the twine.
After the biogas lamp is ignited, this layer of thorium oxide is heated and emits strong light.
Because it takes a process for thorium oxide to heat and emit light, this biogas lamp is not very bright when it is first lit.
Later, it will gradually become brighter during the heating process of thorium oxide.
Luo Yong had also seen biogas lamps when he was collecting agricultural products in the countryside in his previous life.
The biogas lamps at that time also consisted of three parts: a lamp holder, a mesh, and a lampshade.
The difference is that the mesh at that time was made more delicate than the mesh they have now, and the purity of thorium oxide was also higher.
The outer lampshade was made of glass, so the biogas lamp made like that was naturally brighter.
But their biogas lamp is not bad, it is much better than candle oil lamp.
The location of this first biogas digester was built on an open space next to the county government office, which was where the tofu shop used to be.
The tofu shop was closed earlier, so the land was freed up and became a place for people in the city.
A place to relax.
This biogas tank does not take up much space.
It is located behind the tofu shop, in the corner used to store firewood and sundries.
Construction started last winter.
The biogas tank was repaired and a lot of materials were poured in for fermentation.
In the spring of this year, After the ice melted, Luo Yong asked someone to go down with a wooden stick and poke it to ventilate the water.
He also got some horse manure and put it in.
Within a few days, the temperature inside the pool rose.
The structure of the biogas digester is simple.
Generally speaking, it is almost like a pressure cooker.
The materials below are fermented, and the gas produced is collected in the dome above.
In the middle of the dome, which is the highest point, there is an air outlet.
Nowadays, the methane used by people in the city to light lamps comes from this outlet.
To put it more complicated, the discharge port and the discharge port are divided into liquids and solids.
These places are very particular.
What they built this time was a hydraulic biogas pool.
They also built a water room next to the main body of the biogas pool.
When there is too much biogas in the biogas pool and the pressure is high, the biogas liquid in the pool will be squeezed toward the water room.
As part of the liquid is discharged, the air pressure in the biogas pool will naturally drop.
At this time, the water room is equivalent to a safety device.
When there is less biogas in the biogas tank and the pressure is low, the biogas liquid in the water room will flow back, increasing the pressure in the biogas tank to a certain extent and squeezing the biogas towards the air outlet, which is conducive to the collection of biogas.
Even though it is just a small biogas pool, it actually contains the wisdom of many people.
The biogas produced by this pond is first used to provide lighting for the county government and the main street in the city.
The gas pipe is made of pottery and looks about less than two fingers thick on the outside, ranging from two to three feet in length.
There are elbows, and the clay pipes are carefully wrapped with sheep intestine casings to prevent air leakage.
There is a switch under each biogas lamp, and there is a main switch next to the gas outlet of the biogas pool.
This switch is turned on every evening and turned off late at night.
It is turned on again at three or four o'clock in the morning the next day and turned off again after dawn. .
For biogas lamps like this, you only need to pay three cents per month to the government for gas consumption per lamp.
In order to thank these merchants for their contribution to the government's finances, Luo Yong did not ask them to charge them any account opening fees, but had biogas delivered to their doorsteps for free, and even gave them a biogas lamp for free.
After the biogas lamp was made, Luo Yong was also very happy.
They had just lit up the biogas lamp here a few days ago, and they happened to catch up with Du Gou and the others, so Luo Yong proudly introduced the biogas lamp to him.
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Principles of lamps and digesters.
Du Gou was very engrossed in what he heard and marveled at the sophistication of the biogas lamp and biogas pool.
Even the small switches made him want to take them apart and study them carefully.
"If you want to see it, just go to the machine shop to see it someday, but you still need to put the ditch as the first priority."
Luo Yong said to him.
"That's natural."
Du Gou agreed.
Du Gou knew that the reason why Luo Yong entrusted him with the task of repairing the canal was not only to repair the canal, but also to arrange his future.
Although it is also infrastructure construction, building water canals is a very noble thing in the eyes of scholars.
After all, it is related to agricultural production.
In the eyes of the scholars, except for the nobles, farming is considered a serious business in the world.
Although they are poor, they are not humble.
Building such a water diversion and irrigation project will benefit the people even more.
In ancient times, Dayu controlled the floods, and Li Bing, the prefect of the Qin Dynasty, built the Dujiang Weir in Shu County, which is also said to be a good story.
Now if Du Gou can repair the water canal in Changle County, although he cannot compare with the ancients, he can still gain some fame.
Since the death of his father Du Ruhui, the Du family's management has been really ugly.
After experiencing the pain of exile this time, Du Gou even had the idea of climbing up.
No matter whether he can still be used by the court in the future, or whether he can gain some fame and wander around the world from now on, it is better than being despised and ridiculed like this now.
The newly opened wine shop where Jie Feng Yan is located is very spacious.
There are several biogas lamps lit in the lobby, making everything bright.
The food and wine are served one after another, including the onions, garlic, and peppers on the plate.
They can all be seen clearly.
It was not difficult to see anything at all, and my mood was particularly relaxed.
It had been a hard walk all the way before, but now we finally arrived at the place.
Everyone at the table was eating happily, and it was inevitable that they drank a few more drinks.
When Du Gou woke up the next day, it was already close to noon.
The Laizhou young man who came with him had already gotten up.
At this time, he said that he was going to get him face wash, but Du Gou stopped him: "I'll go there myself."
Bar."
There is a room specially used for washing in the county government office.
They went there when they first arrived yesterday afternoon.
"Then I'll go get some food with you."
The young man said.
"Yes."
Du Gou nodded and agreed.
This young man's name is Xia Yan, and he is the son of a local merchant in Laizhou.
Although his family is rich, he does not have much status in the local area.
He interacts with the families who hold real power, and is not only exploited, but also often looked down upon.
Xia Yan followed Du Gou all the way because he wanted to get a chance to stand out.
A few years ago, Xia Yan went to Du Gou when he started making canned fish in Laizhou.
Later, he gradually became a helping hand to Du Gou.
Later, when Du Gou was exiled, he and several other young men from Laizhou worked together.
Escort Du Gou southward.
Now the two of them came to Changle County.
Because of Luo Yong's arrangement, Du Gou felt that his future was much clearer.
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However, for Xia Yan, who had been following him, he could not do anything for him for the time being.
He only hoped that he could do something for him in the future.
If he achieves something, he can repay Xia Yan's loyalty to him.
There is also Luo Yong's trust in him, the Bai family's rescue this time, and the kindness of the Laizhou elders.
After Du Gou returned to the house after washing up, Xia Yan also brought food from the front yard.
Since it was already past breakfast time, the cook in front simply made him something at this time, a plate of soft egg pancakes fried with egg white noodles, and a small bowl of dipping sauce mixed with vinegar and spicy oil.
A big bowl of corn porridge and a plate of sliced baby courgettes.
Du Gou first picked up a piece of egg pancake, dipped it in the vinegar sauce and ate it in his mouth.
It tasted quite good.
He also picked out a piece of courgette, which was very refreshing.
However, the corn porridge was a little cold.
It should have been cooked in the morning and left now.
After breakfast, the two of them went to the front yard.
When they heard that Luo Yong was working, they did not bother him and went out of the county office directly, intending to take a stroll in the city.
Since Luo Lai came to Changle County, this rundown small county has gradually changed its appearance.
The streets have been paved with cement pavements and the city walls have been rebuilt.
Due to the large number of merchants coming and going and the prosperous commerce in the city, many new shops have been built in recent years.
Many families in the county have also renovated their houses when they have relatively ample money.
Now looking at the past, the houses in the city, large and small, generally look neat.
However, there are still very few tall houses.
In some places, there are still dilapidated huts from the past, and some large houses look older.
Whether they are large houses or small houses, they all have thatched roofs.
The small town in front of him was naturally a bit shabby compared to what he saw in Chang'an City a few months ago.
But compared with other places they had traveled along the way, it was already quite wealthy.
When Du Gou was exiled to Lingnan earlier, he passed through many towns and villages along the way.
The closer he got to Lingnan, the more wary the people there were about outsiders, especially in some rural villages, but for Du Gou and the others also saw how difficult their lives were.
Du Gou sighed in his heart while walking in the city.
Before he had gone far, he saw many people walking together outside the city.
They were talking and laughing along the way and walking very fast.
Xia Yan went over and asked, and learned that another batch of coal was coming from outside the city today.
It was transported from Yiwu.
The station should be recruiting people to unload the goods.
Although the unloading work also requires some effort, Getting money is much more refreshing than grinding needles.
Du Gou and the others did not leave the city with them, but went to the city wall.
The patrolling officer knew that Du Gou was Luo Yong's new disciple, so he did not stop them.
When they climbed up to the city wall and headed towards the wooden track, they could see the carriages coming along the track from a distance, and there were also some that had already entered the station.
These carriages transporting coal were surrounded by wooden boards and had tops.
But it was empty, and they were not afraid that the coal in the car would get caught in the rain.
Looking down from where they were, they could see cart after cart of black coal.
At this time, there was a lot of excitement over the car.
There were people inspecting goods and people arranging unloading.
In an open space not far from the car, there were rows of straw sheds built, which seemed to be used to store charcoal.
The few people who had just left the city soon found work and followed the coal truck to the warehouse to unload the goods.
They held tools such as shovels in their hands and talked loudly. , which is roughly the number of the warehouse that the steward just mentioned.
They know the location, which way they want to go, and so on.
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In addition to these working adults, there are also some half-year-old children carrying baskets walking around the station.
They are collecting horse dung here.
There are many horses coming in and out of the station area every day, and there is also a lot of horse dung.
These horses The manure collected can be used to fertilize the land.
If they encounter pebbles falling on the ground, they will also pick them up.
They need to use the pebbles in the pottery making workshop.
They can save some more and carry them over.
If they can exchange them with them for some pots and bowls, they are all items needed at home.
Du Gou and Xia Yan stood on the city wall and looked at the busy scene below the city.
Neither of them were talkative people, so they didn't speak at this time and just watched silently.
After a long time, Na Xia Yan suddenly said to Du Gou: "It would be great if all the towns in the world could be like Changle County."
In the past year or so, they have traveled to many places and seen too much poverty.
The barren land, the rickety old people, and the hungry children have always made people feel unbearable, but there is nothing they can do about it. gd1806102: