This electric boiler was originally planned to be installed in the main urban area, but it was seriously polluted, with flying soot and loud noise. In addition, the boiler required a large amount of water, so it was finally installed in the water and electricity district. [Read full text] In order to prevent floods, the foundations of thermal power stations, distribution rooms, and substations in hydropower districts have been specially raised.
Although the boiler machine has many benefits for the public, it also requires a considerable amount of fuel every day, not to mention that the boiler requires soft water. It would be too much of a luxury to transport distilled water from a ship to the machine. If natural water is used, rainwater is the best, and river water can also be used, but it is best to be softened. Luo Duo said that he could make tannin extract to soften the water, but there was no place to find raw materials for him at the moment. Finally, Wang Luobin said that boiled water could be used instead based on his experience in rural areas.
It was a bit funny to boil water for this giant. There were many stoves dug in a row on the river beach, and all the pots on the boat were unloaded to boil water. The flames were blazing and the steam filled the air. It was extremely spectacular for a while. The passers-by went back to the work of cutting grass and logging, and all kinds of firewood were piled up like a hill.
"Why not use a diesel motor?" Wen Desi was not excited when he saw such a spectacular scene. In his opinion, it was a waste of time and manpower. It was true that the pot camel machine could use no oil, but the manpower consumed in this way There is no economics at all.
The operation of the high-horsepower pot camel machine requires hardened ground - not only the foundation of the pot camel machine, but also the entire urban area must undergo ground hardening work, especially the simple housing residential areas and urban streets that are about to be built.
There are no bricks in our hands yet, but it is very convenient to make concrete. Cement and steel bars are shipped by ship. There are as many stones as you need in Bairentan - Bairentan has always been a quarry in Lingao in history. , the stone is not only supplied for use within the county, but also sold to neighboring counties. After the time travel crew arrived, all the masons ran away. Many of the stone pieces they picked and polished remained. There was also a large amount of gravel waste left after mining in the quarry - there was a lot of river sand on the river beach, which could be used after sifting it. . Cement and mixers were shipped from Bopu. Making concrete also requires wooden formwork. Wu Kuangming built an electric sawmill in Bopu, which could easily produce wood of various sizes, and the wooden formwork was quickly shipped.
After completing the hardening of the ground at the Guotuo Mechanical and Electrical Station, the construction team simply started work on the hydropower project in one go. After all, it is not easy to boil water to feed the boiler every day. Moreover, with the relocation of executive committee offices, residential areas and the establishment of new industrial areas, electricity consumption will soon increase significantly. By then this amount of power will not be enough.
The energy team regarded the Bairentan Hydropower Station as a key project in the energy planning and had a complete set of design drawings for the power station on hand. However, after they held a meeting and negotiated with the construction team, everyone agreed that it was currently beyond their capabilities to fully implement the plan.
The construction of Bairentan Hydropower Station started after the Spring Festival in 1967 and was completed at the end of 1968. The barrage is 94 meters long and 7.5 meters high. It also has supporting gates, caves, channels, aqueducts, and water pipes... Even in the 20th century, the Lingao Hydropower Station was still very large. The large project was completed with the efforts of the entire county, starting with more than 300 government officials and more than 100 water and electricity engineering personnel, and recruiting hundreds of migrant workers throughout the county. The three communes of Touzui, Huanglong and Kunshe were also specially recruited to recruit capable workers. More than 200 fishermen women carried the heavy burden to carry the big rocks. Only 64,000 man-days of labor were invested, 51,800 cubic meters of earthwork, 511o cubic meters of masonry, and 630 cubic meters of concrete were completed...
These numbers are simply astronomical to Chuanchuangzhong, so the entire set of drawings can only be temporarily stored. In the end, it was decided to adopt a simple channel-type water diversion power station. Install a 2ook motor.
The design plan is to first dig a diversion channel upstream of the nine-level Bairentan Waterfall. The width and depth of the diversion channel were calculated based on the water flow and slope. Fortunately, these are available in ready-made data tables. The final size of the diversion channel was determined to be 1.5 meters in bottom width and 1 meter in depth.
The aqueduct feeds water into the pressure forebay, which connects the aqueduct to the pressure pipe. It consists of a front chamber, a waste rack, a gate, a water inlet chamber, an overflow channel and a sand discharge outlet.
The pressure forebay is an important part of a hydropower station. It is not only used to settle sediment and intercept drifting debris to prevent it from entering the turbine and causing damage. It also plays a role in allocating water when there are multiple units. In addition, its main function is to regulate the amount of water entering the turbine.
When the load of the hydropower station increases and the flow required by the turbine increases, the reservoir in the front room can supplement the insufficient water from the channel to prevent the drop in water level from causing air to be sucked into the pressure water pipe and reduce the output of the unit; conversely, when the load suddenly decreases, or the water from upstream When excessive water causes flooding, the excess flow in the channel can be discharged through the overflow channel to avoid affecting the safety of the building.
The gate of the water channel is used to control the flow and intercept water. It is installed in the water delivery chamber of the pressure forebay. Because it is a small hydropower station, this gate was made of wood. Based on what he saw and heard in the countryside, Wang Luobin recommended the use of a wooden arc gate that was popular during the Cultural Revolution. It uses a pulley block and a hand-operated wooden winch when opening, and relies on gravity moment to close. It has a simple structure and is quick to open and close. , extremely convenient to use.
The pressure water pipe is a major problem encountered by builders. As an important component of the hydropower station, it is used to create pressure head to drive the turbine to do work. It not only has to withstand the pressure of the water head, but also has to withstand the water flow in the pressure water pipe caused by closing the turbine guide vane or gate. Water hammer pressure caused by sudden stop. Therefore, the pressure water pipe must have greater strength, otherwise it will easily cause pipe burst accidents.
In modern times, small and medium-sized hydropower stations generally use steel pipes or reinforced concrete pipes. Naturally, they do not have large-diameter steel pipes. The manufacturing of reinforced concrete pipes is not a problem, but the consumption of reinforced concrete is too large. Currently, there is no self-produced cement and steel bars. Ability, there are too many places where it will be used immediately. So someone suggested using ceramic pipes, but the tensile strength of ceramic pipes is poor and they will break under 10 meters of water pressure. They can only be used in power stations with small water heads. Moreover, no one has ever made such a large ceramic piece. I am afraid that it is not possible in Lingao. It’s unlikely that anyone knows how to bake it—and the travelers haven’t found a pottery kiln yet—not even a brick kiln.
Wang Luobin thought twice and proposed using wooden pipes. This kind of wooden pipe is made of wooden materials with a thickness of 4 to 6 centimeters and is tightened with iron hoops. Its strength is better than that of concrete pipes and can be used at water head heights below 100 meters. In contrast, concrete pipes are only Can be used for water heads below 5o meters. If the wooden pipe is well maintained, its lifespan is not inferior, and it can last for 10 to 20 years without any problem.
The problem of wood is relatively easy to solve. The logging work has not stopped for a day these days. Although there is a lack of drying equipment, Wu Kuangming also built an earthen kiln to dry the wood by slowly smoking branches and leaves. This method is very inefficient and dry. The degree is not consistent yet, but it can finally provide enough usable wood.
The problem is that splicing pipes with wooden boards is not easy. It is a bit like hooping barrels. This craft is about to be lost, let alone making such large-diameter wooden pipes. After several unsuccessful attempts, someone finally used CAD modeling to break down the standard size of each spliced piece. The wood team looked at the processing drawings with detailed angles of each piece of material that were accurate to the millimeter and couldn't laugh or cry - I don't have a CNC sawing machine here.
But with numbers, there is a direction for exploration. According to the data in the drawings and after several days of exploration, the first pipe was finally spliced. It was 4 meters long and 0.7 meters in diameter. It was tightened with iron hoops. After a simple water test, it was found that the splicing strength was not enough. During the manufacturing The thickness of the iron hoop and wood was added to the second pipe. After passing the test, the sawmill immediately produced 32 meters of pressure wood pipes, 12 meters of which were spare. Facts have proved that this backup is necessary, and 2 of them were scrapped during the construction stage. The joints between the pipes are connected and sealed with cement mortar. The buttresses and ballasts between the pressure pipes are made of cement mortar.
The bottom of the pressure pipe is the power plant building. Its base requirements are relatively high, so gravel mortar concrete was used at no expense. Part of it was stone strips of various sizes found in the quarry with unknown uses.
Although Mei Wanwan and his construction engineering team have never built a hydropower station before, the power station equipment designed for rural areas has detailed and easy-to-understand instructions. After careful study by a group of people with rich engineering experience, coupled with their own memories of the hydropower stations they had witnessed, it was not difficult to figure out the specific construction methods. Excavating earthworks, ditches, building factories, and even erecting electric poles are all very easy. The water channel is an earthen channel, and other buildings are made of cement mortar and stone.
Excavation in certain stony areas is more laborious, but with tools such as air compressors and pneumatic picks, it is easier to overcome. Originally, the executive committee had allocated some nitrate, ammonia and kerosene to prepare for the use of explosives for construction if necessary. However, Mei Wan thought it would be better to use less of this kind of killer weapon - none of them had any engineering experience in using explosives.
Because Wang Luobin has lived and worked in rural Guangxi for many years, he is very familiar with agricultural and livelihood buildings such as rural small hydropower stations. He is basically responsible for coordinating recent projects. When inspecting the construction site, he saw a group of people at the hydropower station from a distance. People gathered around, seeming to be arguing about something. He got closer and saw that there were mainly members of the construction team and the subordinate engineering team. One was the team leader Mei Wan, and the other he had a vague impression of was Zhuo Tianmin, who proposed to build simple roads first during the highway infrastructure construction.
