Red sand dust

When the entire ninja world knew that the Kingdom of Wind was severely short of water, it was basically impossible for residents in the Kingdom of Wind and Sand to buy cheap fresh water.

There has never been a shortage of difficulties such as raising prices and taking cards. Even Konoha Village, which is an ally, sells strategic materials to Sunagakure Village at a much higher price than the market price.

In a sense, there are not many precious metals in the Kingdom of Wind, but money is never enough. Key resources are controlled by others, and exploitation is inevitable.

Daimaru had thought about it for a long time before, and wanted to find a way to alleviate the water shortage problem in Sunagakure Village, but it was unrealistic.

The most direct method is, of course, to use the power of ninjas.

Can a water ninja desalinate sea water?

It should be possible, but Daimaru doesn't know.

However, how many water-bending ninjas would be needed to support a ninja village, or even a large country with fresh water?

With this free time, it might be more cost-effective to let these ninjas do their tasks and use the money to buy water.

What's more, there aren't many ninjas who are good at water escape in Sunagakure Village.

"Relying purely on "manpower" cannot solve the problem! 』

It is not difficult to come to this conclusion.

So Daimaru whimsically thought of using the "dirty earth body" with unlimited chakra to help.

Let's not talk about whether it can be realized, at least the current Daimaru does not have the ability to learn S-level forbidden techniques such as the Reincarnation of the Earth.

In Daimaru's mind, the ideal seawater desalination method suitable for Sunagakure Village should involve limited participation of ninjas, using ninjutsu to cross the key technological gap, and then relying on ordinary people or even natural forces to achieve extremely large amounts of seawater desalination.

In view of this, among several suitable methods, solar heating distillation was the first to be eliminated because the amount of fresh water prepared was too small.

The advantages and disadvantages of the reverse osmosis method are very obvious. The biggest problem is that the chemical technology in the Ninja world is too backward, and there is no way to produce cheap and efficient reverse osmosis membranes.

The original most energy-saving low-temperature multi-effect distillation and desalination technology was the method Daimaru had the highest hopes for. Unfortunately, the results were that the materials, heat conduction and exchange, and process maturity were far from the ideal level.

As for those desalination methods that seem to be more high-end but more difficult, they are basically impossible to achieve in the ninja world.

In the end, only one more traditional desalination technology stood out.

That is multi-stage flash evaporation.

In terms of energy saving, multi-stage flash evaporation is far inferior to low-temperature multi-effect, but the advantage is that the process is simple and the requirements for materials are not high. With the technical capabilities of Sand Hidden Village, it is completely achievable.

The advantage that Daimaru values ​​most is the huge amount of seawater desalination in a short period of time.

In addition, it is highly safe and can be operated by ordinary people; if you are a ninja, you can even take full advantage of your extraordinary strength.

In the end, there were two other points that made Daimaru decide to choose multi-stage flash evaporation. One was that it could be built in conjunction with a thermal power station and use the waste heat from the power plant to prepare fresh water; the other was that it was particularly suitable for the puppet technology of Sunagakure Village, which is unique in the ninja world. play.

The entire ninja world is in the transition stage from the steam age to the electric age. Since the petrochemical industry has not developed, there is no room for the internal combustion engine to play.

Stupid, big, clumsy, and clumsy is the current situation of the ninja industry.

High power consumption, high output, low efficiency mechanical and electrical devices are the mainstream.

This level of technology is especially suitable for very large thermal power plants and multi-stage flash desalination devices.

As for the coal and iron resources required for thermal power plants and the pollution problems they cause, the ninja world has not yet reached the point where it needs to be considered.

"A power generation and multi-stage flash desalination plant on the seaside can already support a small town! 』

Industrial towns that thrived on factories were rare in the ninja world, but they were common in Daimaru before the time travel.

The idea should be highly likely to be realized, but the problem is that the upfront investment is too daunting, and it is impossible for the village to invest too much money before seeing Daimaru create water.

But without strong support, how could a power plant or a desalination plant be built on Daimaru?

"How can I convince those elders who have absolutely no concept of industrialization or scientific spirit to agree with my ideas?" 』

The biggest problem at present is to convince others that the so-called "multi-stage flash evaporation desalination technology" is not nonsense made by Daimaru to defraud money.

The principle is actually not complicated.

Everyone knows that water freezes at zero degrees Celsius and boils at 100 degrees Celsius.

Because water is not completely pure, the above temperatures will vary slightly depending on the solute.

However, the boiling point of 100 degrees Celsius is actually the temperature at standard atmospheric pressure. If the air pressure decreases, the boiling point temperature will also decrease. Therefore, theoretically, the boiling point of water at the top of the Himalayas is much lower than the boiling point of water at sea level.

Multi-stage flash evaporation is a seawater desalination technology designed based on such differences.

The steam waste heat from thermal power plants is used to heat seawater to a very high temperature, such as 98 degrees, but it does not boil.

At this time, 98-degree water is injected into a flash chamber with a lower pressure. Under this pressure, the water will boil at 95 degrees.

But at this time, the water in the flash chamber has reached 98 degrees, exceeding the boiling point. What will happen at this time? Obviously, water that exceeds the boiling point will quickly evaporate a large amount of water in a very short period of time, taking away heat and reducing the water temperature to below ninety-five degrees. This process is called "flash evaporation."

The evaporated water condenses and becomes fresh water.

Next, the hot seawater lowered to below 95 degrees is injected into the flash chamber where the pressure is lower and the boiling point of water is 90 degrees, and a large amount of additional water is condensed into fresh water.

By repeating the above process and reducing the air pressure in the flash chamber step by step, a large amount of seawater can be desalinated in a short time. This is "multi-stage flash evaporation".

The principle is simple, but the actual operation is a little complicated, but it is not too difficult. It depends on whether the process is reasonable and efficient.

The "multi-level flash" technology is not very sophisticated, but it is definitely a method suitable for the ninja world, especially in Sunagakure Village, which has the ability to make large puppets. Some operations that are not suitable for civilians, or even ninjas, can be done with puppets. substitute.

Such desalination technology cannot allow residents of the Country of Wind to drink cheap water, but it is of great significance.

It is difficult to achieve "good quality and low price" in one step. We must first achieve "good quality" and "cheap price" slowly. More importantly, we can get rid of the dependence on external fresh water input to a certain extent. In the future, we can do business with other countries. It can also be a little tougher.

However, the scene imagined by Daimaru is more like a fantasy. Without physical proof, who can believe it!

Just when Daimaru was stuck in a dead end and had no choice but to do anything, Jounin Centipede, who was just a casual acquaintance at first, came to the door and seemed to want to talk to Daimaru about a slightly mysterious topic...