Chapter 347: Cao Guang's Subject

If this situation is not alleviated, we will pay a heavy price in the near future. 『』

Therefore, as soon as Li Zhiyang heard that Cao Guang was studying a seawater desalination project, he immediately came to his senses! You must know that those who can make achievements in this field are all gods.

If this Cao Guang is indeed a person with material and ability, then what about investing in him and completing the rest of the research?

However, we must first listen to this Cao Guang's research, to what extent, and whether there is specific investment value.

"Hehe, are you really interested in learning about this?" Cao Guang felt a little ridiculous, in his opinion, this Li Zhiyang was just a layman who was slightly interested in his research.

At this time, even if he explains to him, he may not be able to understand the aspects involved in his major.

"I'm not kidding, I'm serious. ”

Li Zhiyang saw the hint of playfulness in Cao Guang's smile, and he knew that Cao Guang thought he was just a layman.

This was not what he wanted, and he asked Cao Guang to get serious and explain his research to him well, that he really planned to invest in this project.

"Okay, then I'll tell you about it. Cao Guang saw that Li Zhiyang's expression didn't look like he was joking, and he didn't have anything to do anyway, so he planned to give Li Zhiyang a good talk.

"You also know that many countries in this world are short of water, such as those countries in the Middle East, as well as our Celestial Empire. The Middle East is because of the influence of the geographical environment, and we are because of the excessive population pressure, coupled with not good at serious environmental design, so in recent years, the waste and pollution of fresh water is very serious, so the current Celestial Empire is already an extremely short of water, especially a lack of fresh water. 『』”

Cao Guang first began to talk about the lack of fresh water in the world, but Li Zhiyang knew all about these situations, but he didn't want to interrupt him at this time, it would be very rude.

"On the surface, desalination is very simple, just separate the salt in the salt water from the fresh water. The simplest method is distillation, in which the water is evaporated and the salt is left, and then the water vapor is condensed into "liquid" fresh water. However, this method also has flaws, that is, it consumes a lot of energy, if you only use natural distillation, that is, the use of sunlight, the first requires a huge amount of space, and the second is a waste of time, and it is also limited by various natural environments, such as rainy weather, or winter, and such distillation methods, often leave a huge saline-alkali land. If artificial distillation is used, the fresh water obtained in this way requires a lot of fuel to be burned, which is very expensive, and the salt and other impurities contained in the seawater will adhere to the pipe wall of the distillation apparatus, which is difficult to clean. ”

Cao Guang began to explain the method of desalination to Li Zhiyang and Nancy, and he began to talk about the history of desalination.

Another method of desalination is freezing, which freezes seawater to freeze it, and the salt is separated at the same time that the 'liquid' freshwater becomes solid ice. However, the freezing method also consumes a lot of energy, and the resulting fresh water is not tasteful and difficult to use, and is often used as industrial water, not as drinking water. ”

Cao Guang explained another method of desalination to Li Zhiyang, but as he said, the effect was not ideal.

"There are two more popular methods now, one is to use semi-permeable membranes to achieve the purpose of separating fresh water from salt. Under normal circumstances, semi-permeable membranes allow solvents in the solution to pass through, but not solutes. Due to the high salinity of seawater, if seawater is separated from fresh water by a semi-permeable membrane, the freshwater will diffuse to one side of the seawater through the semi-permeable membrane, so that the "liquid" level on the seawater side will rise until a certain height creates pressure, so that the freshwater will no longer diffuse. This process is osmosis. If the opposite is true, to obtain fresh water, as long as the pressure is applied to the seawater in the semi-permeable membrane, the fresh water in the seawater will penetrate into the semi-permeable membrane, while the salt is blocked in the seawater by the membrane. This is the reverse osmosis method. The biggest advantage of reverse osmosis is energy saving, producing the same quality of fresh water, and its energy consumption is only 1/40 of that of distillation. Therefore, many developed countries in the world are focusing on this aspect. 『』”

Cao Guangyou introduced Li Zhiyang to a more popular seawater desalination method.

In addition, a more popular seawater desalination method is the multi-stage flash method, which refers to the phenomenon of rapid evaporation of part of the seawater at a certain temperature under the condition of sudden decrease in pressure. Multi-stage flash seawater desalination is to evaporate heated seawater in multiple flash chambers with gradually decreasing pressure, and condense steam to obtain fresh water. At present, the world's seawater desalination device is still the largest output by multi-stage flash evaporation method, the most mature technology, and the operation safety is high and elastic, mainly jointly built with thermal power stations, suitable for large-scale and super-large desalination devices, mainly used in the Gulf countries. The multi-stage flash evaporation technology is mature and reliable, and the main development trend is to improve the water production capacity of the unit, reduce the unit power consumption, and improve the heat transfer efficiency. ”

Cao Guang also introduced the second most popular desalination method to Li Zhiyang.

In his previous life, Li Zhiyang only participated in the financing projects of some urban tap water improvement projects, and he did not know much about seawater desalination here.

Listening to such a master figure explain to him today, I realized that there are so many ways to desalinate this seawater.

"So, isn't the method of desalination more mature now?"

When Li Zhiyang heard Cao Guang introduce so many methods of desalination, he asked with a little doubt.

Cao Guang introduced so many seawater desalination methods, it seems that the current seawater desalination methods have become more and more mature, so you are still researching a ghost?

"The same can't be said, for example, the first two methods we mentioned before, distillation and freezing, are not used much now, and even no one does it anymore. Because they are too energy-intensive, and the output is not much, the cost is too high. The recovery rate of the reverse osmosis system and the ability to resist contamination have always been a problem. The multi-stage flash evaporation method also has certain limitations, such as this method can only be done around the thermal power plant, so it is also a relatively energy-consuming method. 『』”

Of course, Cao Guang heard what Li Zhiyang meant, so he explained to Li Zhiyang again.

"So what are you studying, are you working on a new way to desalinate seawater?"

Li Zhiyang felt that Cao Guang should start studying in this direction, so he asked out loud.

"Well, yes, the method we are studying now is a new type of rapid spray evaporation method, that is, the seawater is sprayed into the separation chamber through the pipeline to form very fine water droplets; in the hot air of the separation chamber, the water droplets evaporate rapidly, and impurities such as water and salt are separated; and the water vapor is fed into the condensation chamber to become pure water. ”

Cao Guang said with a look of pride.

This method Li Zhiyang sounds very simple, and there is nothing special about it. Cao Guang also saw Li Zhiyang's doubts, so he explained to him again.

"The most powerful thing about our method is that first, using our desalination method, after obtaining fresh water, the salt in the seawater will fall at the bottom of the separation chamber, while the traditional technology salt is recovered and collected on the top of the pipe, which is difficult to remove. Second, this method can treat water with a salt content of up to 16%, which is much higher than the concentration of ordinary seawater. And on average, it costs 16 to 27 cents to produce 1,000 litres of fresh water, or even less. Third, this kind of device can also treat wastewater, and the efficiency of technical recovery can reach 95%, while the traditional technology can only reach 35%, and the investment is only a quarter of that of distillation and reverse osmosis, and the operation and maintenance costs are greatly reduced. ”

Cao Guang explained to Li Zhiyang with a proud face that it turned out that these advantages were the most proud of the subject he studied.

Li Zhiyang didn't understand much at first, but after listening to Cao Guang's explanation, his eyes lit up, I damn it, this is too nb, 1000 liters of fresh water is so much money?

Is this about the same price as tap water?

"Then is your method mature?" Li Zhiyang hurriedly asked Cao Guang. 『』

To say that at the beginning, he still wanted to help his friend, but now he has been completely attracted by Cao Guang's words, which aroused his interest in investment.

If the subject of Cao Guang's research is really so magical, then human demand for fresh water in the future will not be a problem.

"Of course, my research team and I have been working on this project for three years, and now we have made a portable and simple device that can produce 11,000 liters of fresh water per day. ”

Cao Guang returned.

"Now that you've worked out this improvised device, why do you say that your experiments haven't been completed yet?"

Li Zhiyang felt a little strange, didn't this Cao Guang already research the device? Why is he still asking Na Wilson for funds to continue his research, is his subject still not very mature at present?

"Hehe......" Cao Guang was also asked by Li Zhiyang's sharp question, laughed awkwardly a few times, and then said.

"Zhiyang, you also know that the problem of desalination is how to maximize the output, my research, the current problem, is the heating, decompression, the current problem of these technologies has been solved, but you also know that these are high energy consumption problems. At present, energy conservation and emission reduction are the mainstream of the entire industry, so we are researching a state-of-the-art energy-saving method, and at the same time saving energy, we must also increase the production of fresh water. ”

Cao Guang continued to explain his difficulties to Li Zhiyang.

When Li Zhiyang heard this, he finally had some eyebrows, so he asked out loud: "Then Brother Cao, did you encounter some problems here?"

"Yes, yes. Cao Guang replied directly.

"You also know that the method we are studying is to spray seawater into the separation chamber in a way that has been sprayed, and then separate the fresh water after meeting the hot air inside, but this hot air and seawater atomization here are more energy-intensive, and we don't want to use the old method of distillation and combustion, so we are studying whether to use another method, but at the most critical moment, Wilson has cut expenses...... Hey!"

Cao Guang said this, smiled wryly and shook his head, it seems that there is nothing to do. 『』

"Oh, Brother Cao, what kind of method do you plan to use to atomize seawater and heat the air?"

Li Zhiyang is now full of interest in Cao Guang's subject, and he seems to have seen another golden avenue.

"In fact, it is not a special method, that is, the reasonable use of solar energy, or the power brought by wind energy, but you also know that such a project is a systematic project, and all links must be done tightly, and there can be no leakage in order to achieve the greatest effect. ”

Cao Guang continued to patiently explain to Li Zhiyang.

"Then have you made certain achievements in these two fields?"

Li Zhiyang broke the sand pot and asked in the end, he planned to listen to what this Cao Guang had to say, and see if he could surprise himself again.

"We have encountered some problems in the use of solar energy, and our research team has the latest concept to maximize the use of solar energy, but specific experiments are still needed. As for wind power generation, the existing technology is very mature, and if this desalination plant is built on the seashore, then "tidal" tidal power generation can also be added to this project. And at present, we need funds to put the whole experimental system theory into practice and make a small seawater treatment simulation plant, but you know that this needs funds. ”

Cao Guang continued.

"Then Brother Cao, do you think that if your project can be successfully studied, what will be the cost of not getting a single meal of fresh water that you can successfully desalination?"

Li Zhiyang feels that this cost is the most critical place.

"If you build a treatment plant with a capacity of 500,000 tons of fresh water per day, then the cost can basically be controlled at about 10 cents per ton of fresh water, and if the treatment plant is larger, then the cost will be lower. If a 5 million tonnes per day fresh water treatment plant can be built, the cost will be around 1 cent per tonne. ”

Cao Guang said proudly.

If I invest in the subject of Cao Guang's research, if he can realize this project, then what he does is simply a profitable deal!

You must know that the Celestial Empire is now an extremely water-poor country, especially in the north, the Mengyuan Plateau, and the Qingbei Province is even more water-deficient.

At present, the land area of the Celestial Empire is very large, but in the north, especially in the northwest, there are more than one million square kilometers of desert and Gobi desert, which are all caused by lack of water.

Moreover, these deserts continue to expand every year, deteriorating the environment of the Celestial Empire and squeezing the living space of the people of the Celestial Empire.

You must know that this more than one million square kilometers of land has gradually turned into a desert, which is an extreme waste of land!

These places were not like this before, just like the eight hundred miles of Qinchuan, which was the most prosperous place in the Celestial Empire during the Qin and Han dynasties and even the Tang Dynasty.

Even the northern province of the Qing Dynasty was once a horse ranch in ancient times, a land of abundant water and grass, but since the Song Dynasty, these places have slowly declined.

Whether it is due to changes in the natural environment or the excessive misuse of natural resources by humans that has led to the decay of these places, no one can say at present.

Now 800 miles of Qinchuan, you can often see the loess slopes everywhere, and the most serious soil erosion area.

During the period before Li Zhiyang's rebirth, there was a news on the Internet, that is, there was an addressologist of the Celestial Empire, who spent half his life researching.

In the end, he came up with a solution, that is, to divert the sea water of the Bohai Sea to the mainland, especially in some areas where the land is seriously desertified and seriously eroded by desert, to deal with the local water shortage problem.

And after the desert is injected with seawater, it is naturally regulated by nature, where excessive water vapor is produced, and then rainfall is formed, and artificial vegetation is planted, so as to achieve the purpose of sand control and sand fixation, and control the desert.

However, as soon as this proposal was put forward, it was greatly questioned, because first of all, the topography of our country is high in the west and low in the east.

Pumping water from the Bohai Sea and transporting it inland is a very energy-intensive business. But the professor argues that building a few more wind farms along the route would be enough to solve the problem, and that in the north, wind power is a very abundant resource.

However, this second problem is the "hole" of this proposal, that is, this sea water is not fresh water after all, and if there is a leak along the way, it will soon create a saline-alkali land, which will be an extremely unforgivable result for the Celestial Empire, which is short of land resources and its scarcity.

So when this proposal was first proposed, it was once rumored on the Internet and caused a lot of controversy.

Many netizens have had a heated discussion about this, some think it is not feasible, and some think it is feasible.

Because the cost of this project is lower than the cost of the South-to-North Water Diversion Project.

However, those who oppose it are not unreasonable, once there is a leak along the way, who will be responsible for the saline-alkali land caused by it?

Such a big loss is indeed not something that one or two people can afford.

Li Zhiyang was impartial at that time in this proposal, and he also hoped to divert seawater into the interior and change the ecological environment of the inland, after all, this seawater is inexhaustible.

But this sea water leak is also a major crisis, and once it does happen, the consequences will be irreversible.

He had been thinking about the proposal for a long time, but he still couldn't figure it out.

But today, after hearing Cao Guang's thoughts and the research direction and report of his research group, Li Zhiyang immediately remembered that proposal.

What if it's not seawater that is sent inland, but fresh water?

Then this project is definitely worth the investment! Recommended Reading: - - -

(Tianjin)