North and South groceries

The biogas lamp that Luo made with them this time is no different from ordinary lanterns at first glance. If you lift up the outer cover of the lantern and take a closer look, you will find that there is a netted gauze cover between the wick and the lampshade. , this gauze is the key to the biogas lamp.

This gauze is woven with fine and tough hemp threads, and then a layer of thorium oxide is applied on the outside of the hemp threads. After the biogas lamp is ignited, this layer of thorium oxide will burst out with strong light when heated.

Because the heating and luminescence of thorium oxide requires a process, this biogas lamp is not very bright when it is just lit, and then it will gradually become brighter during the heating process of thorium oxide.

When Luo Yong was harvesting agricultural products in the countryside in his last life, he also saw a biogas lamp. At that time, the biogas lamp was also composed of three parts: a lamp base, a gauze, and a lampshade.

The difference is that the mesh at that time was more refined than the mesh they have now, and the purity of the thorium oxide was also higher, and the outer lampshade was made of glass, so the biogas lamp made in that way was naturally brighter.

But their biogas lamp is not bad, it is much better than the candle oil lamp.

The location of the first biogas digester was built on an open space next to the county government office, which was also the location of the former tofu workshop. The tofu workshop was closed earlier, and the land was vacated, and it became the common people in the city. A place to relax.

The biogas digester doesn't take up much space either. It's behind the tofu workshop, in the corner where firewood and sundries used to be placed. Construction started in the winter of last year. The biogas digester was repaired and a lot of materials were poured in for fermentation. It will start this spring After the ice melted, Luo Yong asked someone to poke it down with a wooden stick to ventilate, and then got some horse manure down. In a few days, the temperature inside the pond rose.

The structure of the biogas digester is simple and simple. On the whole, it is almost like a pressure cooker. The material below is fermented, and the gas produced is collected to the dome above. In the middle of the dome, which is the highest point, there is a gas outlet. Nowadays, the biogas used by the people in the city to light lamps all comes out of this outlet.

If it is more complicated, the discharge port and the discharge port are divided into liquid and solid, and these places are all particular.

What they did this time was a hydraulic biogas digester. A water room was built next to the main body of the biogas digester. When the pressure of the biogas in the biogas digester was high, the biogas liquid in the pool would be squeezed to the side of the water room. As a part of the liquid is discharged, the air pressure in the biogas digester will naturally drop, and the water chamber is equivalent to a safety device at this time.

When the biogas in the biogas tank is low and the pressure is low, the biogas liquid on the other side of the water tank will flow back, increasing the pressure in the biogas tank to a certain extent, and squeezing the biogas to the gas outlet, which is conducive to the collection of biogas.

Although it is just a small biogas pool, it actually embodies the wisdom of many people.

The biogas produced by this pond is firstly used for the lighting of the county government and the main street in the city. The gas-introducing pipe is made of pottery. There are elbows, and the pottery pipes are carefully wound with sheep intestine casings to prevent air leakage.

There is a switch under each biogas lamp, and there is a general switch on the side of the gas outlet of the biogas tank. This switch is turned on every evening, turned off late at night, turned on again at three or four o'clock in the morning the next day, and turned off after dawn .

For biogas lamps like this, each lamp only needs to pay the government three renminbi a month for gas consumption.In order to thank these merchants for their contributions to the government's finances, Luo Yong didn't ask them to charge their account opening fees, let people bring biogas to their door for free, and even gave away a biogas lamp for free.

After the biogas lamp was made, Luo Yong was also very happy. It was only a few days after the biogas lamp was lit on their side, and they just caught up with Du Gou and the others, so Luo Yong proudly introduced the biogas lamp to him. The principle of lamps and digesters.

Du Gou listened very intently, and marveled at the ingenuity of the biogas lamp and biogas pit. Even the small switches, he wanted to take them apart and study them carefully.

"If you want to see it, you can just go to the machine workshop to see enough, but the matter of the canal is the most important thing." Luo Yong said to him.

"That's natural." Du Gou agreed.

Du Gou knew that the reason why Luo Yong entrusted him with the construction of the canal was not only to repair the canal, but also to arrange his future.

Although it is also an infrastructure construction, the construction of the canal is quite expensive 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 regarded as a proper livelihood in this world. Although they are poor, they are not cheap, and the construction of such a water diversion irrigation project will benefit the people.

In ancient times, Dayu used to control the floods, and Qin Taishou Li Bing built Dujiangyan in Shu County, which is also said to be a good story.

Now if he, Du Gou, can repair the canal in Changle County, although he can't compare with the ancients, he can still gain some reputation.

Since the death of his father Du Ruhui, Du's management in their branch is really too ugly.After suffering the pain of exile this time, the idea of ​​climbing up was born in Du Gou's heart.

No matter whether he can still be used by the imperial court in the future, or win a bit of fame, whether he wanders around the world from now on, it is better than being despised and ridiculed as he is now.

The newly opened wine shop where the reception banquet is located is very spacious. Several biogas lamps are lit in the lobby, shining brightly everywhere. The wine and dishes are served one by one, even the ingredients such as onion, garlic and pepper on the plate You can see everything clearly.

Looking at things is not strenuous at all, and the mood is extraordinarily relaxed. After walking hard all the way ahead, I finally arrived at the place at this time. Everyone ate happily during the banquet, so they inevitably drank a few more glasses.

When Du Gou woke up the next day, it was almost noon, and the Laizhou youth who came with him had already woken up. At this time, he said that he was going to wash his face, but Du Gou stopped him: "I will go by myself." Bar."

There is a room specially used for washing in this county government office, and they went there when they first arrived yesterday afternoon.

"Then I'll get you some food." The young man said.

"Yes." Du Gou nodded in agreement.

This young man is called Xia Yan, and he is the son of a local merchant in Laizhou. Although his family is rich, he has no status in the local area. He associates with those families that hold real power.

Xia Yan followed Du Gou all the way here, also wanting to fight for a chance to get ahead.

A few years ago, Xia Yan went to join Du Gou when he started making canned fish in Laizhou, and gradually became a helper for Du Gou. Escort Du Gou to the south.

Now the two of them came to Changle County, because of Luo Yong's arrangement, Du Gou felt that his future was much brighter, but for Xia Yan who had been following him all the time, he couldn't do anything for him for a while, he only hoped that he could To achieve something is to repay Xia Yan's loyalty to him.

There is also Luo Yong's trust in him, the rescue of the Bai family this time, and the kindness of the Laizhou elders.

After Du Gou washed up and returned to the house, not long after, Xia Yan also brought food from the front yard.

Because it was already past the time for breakfast, the cook in front of him simply made some for him at this time, a plate of soft omelette fried with egg white noodles, a small bowl of dipping sauce made of vinegar and spicy oil, A big bowl of corn porridge, and a plate of sliced ​​courgettes.

Du Gou first took a piece of egg pancake, dipped it in vinegar sauce and ate it in his mouth, it tasted good, and then he took a piece of courgette, which was very refreshing, but the corn porridge was a bit cold, it should have been cooked in the morning and put it now.

After breakfast, the two of them went to the front yard, and when they heard that Luo Yong was working, they left the county office without bothering him, intending to take a stroll in the city.

Since Luo Yong came to Changle County, this dilapidated small county has gradually changed its appearance. The streets have been paved with concrete pavement, and the city walls have been rebuilt.

Because there are many merchants coming and going and the commerce in the city is developed, many new shops have been built in the past few years. Many families in the county have also refurbished their houses when they have more money.

Looking at the past now, 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, and some big houses look old. Whether it is a big house or a small house, they all have thatched roofs.

Compared with the scene he saw in Chang'an City a few months ago, the small city in front of him was naturally a bit shabby.But if compared with other places they have traveled along the way, it is already quite rich.

When Du Gou was exiled to Lingnan earlier, he passed many towns and villages along the way. The closer he was to Lingnan, the more wary the people there were of outsiders, especially in some rural villages. Du Gou and they also see the hardship of their lives.

As Du Gou was walking in the city, he felt emotional in his heart. Before he had gone far, he saw many people walking out of the city together, chatting and laughing along the way, and walking very fast.

Xia Yan went over to inquire, and learned that another batch of charcoal was coming from outside the city today, and it was transported from Yiwu. The station should recruit manpower to unload the goods. Although the unloading work requires some effort, Getting money is much easier than grinding needles.

Du and Gou didn't go out of the city with them, but went to the city wall. The guards on patrol knew that Du Gou was Luo Yong's new disciple, so they didn't stop him.

When they climbed up to the city wall and turned towards the direction of the wooden track, they could see the carriages coming along the track from a distance, as well as the ones that had already entered the station. The car is empty, and they are not afraid of the coal in the car getting rained. Looking down from them, you can see car after car of black charcoal.

At this time, the car side is very lively, there are people inspecting the goods, and some arrange unloading. On an open space not far from the car, there are rows of thatched sheds, which seem to be used to store coal.

The few people who had just left the city soon found jobs and followed the charcoal truck to the warehouse to unload. They held tools like shovels in their hands and talked loudly. , about the number and number of warehouses mentioned by the steward just now, they know the location, which way to go and so on.

In addition to these working adults, there are also some half-grown children with baskets on their backs wandering around the station. They are here to pick up horse manure. There are many horses coming in and out of the station every day, and there is also a lot of horse manure. The manure collected can be used to fertilize the land.

If there is charcoal falling on the ground, they will also pick it up. This charcoal is used in the pottery workshop, so save some and carry it back, and they can exchange some clay pots and bowls with them, all of which are used at home.

Du Gou and Xia Yan stood on the city wall and looked at the busy scene below the city. Neither of them was a talkative person, so they didn't speak at this time, just watching silently.

After a long time, Na Xia Yan suddenly said to Du Gou: "It would be great if all the cities and towns in the world could be like Changle County."

Over the past year or so, they have traveled to many places and seen too much poverty. Those barren land, rickety old people, and hungry children are always unbearable, but they are powerless.