Lord of the Desert

Chapter 209 Hydrocyclone Separation
The moonlight drifts away, and the night is still young.

Hong Fan habitually turned the charcoal pen flexibly with his right hand, silently recalling.

As far as he knows, there are two working methods of centrifuge - centrifugal filtration and centrifugal sedimentation.

Centrifugal filtration uses the centrifugal pressure generated under the centrifugal force field to make the suspension pass through the filter screen to separate the solids, leaving a clear filtrate.

Centrifugal sedimentation uses the principle of rapid sedimentation and stratification of components with different densities in the suspension to achieve separation.

The former is obviously not suitable for separating and seizing nobles.

For the industrial technology of centrifugal sedimentation, Hong Fan only has a general understanding.

He knows the conceptual structure of butterfly and tube separators, and knows that the physical and chemical properties of suspended matter should be considered in separation—such as density, viscosity, strength, stiffness, surface tension, friction coefficient, adsorption equilibrium constant, dissociation constant, etc.

But just knowing these things is not enough.

Generally speaking, it is almost impossible for a person without manufacturing experience to use a "idea" to create something like a "cyclone separator" or a "screw discharge centrifuge".

The difficulty in design is still second, the key is the difficulty in practice.

The processes of smelting, casting, grinding, etc. are all extensive and profound - among other things, the making of casting molds alone is enough for ordinary people to spend a lifetime.

However, Hong Fan's situation is different.

Having a sand world is equivalent to having a universal mold that can be changed in real time, and can be fine-tuned without dead ends.

After spending one night, Hong Fan sorted out several conceptual design drafts in different directions.

Based on density gradient centrifugal separator, this design has high separation precision.

Based on the gas-solid system cyclone separator, the design is simple in structure and high in efficiency.

A hydrocyclone based on a liquid-solid system, this design separates a wide range of particles...

In addition, there are also discs for expanding the subsidence working surface and so on.

It wasn't until the rooster sang dawn that Hong Fan felt that his brain was exhausted, so he put away the manuscript, went into the bedroom and took a nap for an hour.

In the afternoon, Zhu Jingfu sent some auxiliary tools he needed.

Includes precision balances, micrometers (screw micrometers), magnifying glasses, and more.

In Hong Fan's view, the development of Dahua's engineering is obviously faster than that of basic theory.

Due to the existence of Martial Arts, some people have physical functions that far exceed those of their counterparts in other worlds—a warrior who has successfully practiced the "Tianji Code" is equivalent to a humanoid machine tool with low efficiency but perfect precision.

Therefore, it is possible to not know why but to become what it is.

A small amount of Duo Zhuzi waste was impacted and ground with fine sand, and turned into relatively uniform ten-micron particles.

With the help of tools, its density is also estimated.

The data may not be very accurate, but at least there is a basis for a detailed plan.

The time came to May 23.

Hong Fan finished writing with five charcoal pens and did not know how much paper he used, and finally completed the design work.

Next comes the validation phase.

Use the sand world to refine the sand to the limit that can be controlled, and then directly shape the equipment according to different plans.

The density gradient scheme was the first to be rejected.

It's not that the method is not good, but that a suitable density gradient solution cannot be obtained.

Hong Fan had heard of cesium chloride gradient solution, which was often used to separate RNA from DNA in previous lives.

But what he doesn't know is not only how to prepare this thing, but also whether this element with atomic number 55 has been discovered in Dahua, and even if it is discovered, what name it will be given...

Another well-known is the sucrose gradient solution.

Raw materials are readily available.

The preparation method that has been heard in previous lives is also relatively simple - after preparing the initial sucrose solutions of different densities, they can be added in batches.

However, perhaps due to the lack of some technical know-how, the stability of what Hong Fan created was extremely poor and could not be used in production.

The cyclone separator is the simplest to design, but it is not effective in practice.

The movement of gas and solid particles in the cyclone separator is very complicated, and there are tangential, radial and axial velocities at any point, and vary with the radius of rotation.

The calculation and simulation of fluid dynamics is extremely complicated, and it is impossible to solve it without the help of a computer; therefore, Hong Fan can only use the sand model to practice repeatedly, and use multi-stage blade control to adjust the air intake speed.

If the gas velocity is too small, the separation efficiency is too low.

When the gas velocity is too high, vortex and back-mixing will occur if you are not careful, which will cause pollution instead.

No matter how it is modified, the purity of the final product is not enough.

One plan after another proved to be a failure.

Until May 26, Hong Fan finally saw the dawn here in the hydrocyclone.

The principle of the hydrocyclone is roughly the same as that of the cyclone separator. It is a cone-shaped device with a spiral carved inside.

The feed liquid enters in the tangential direction from the upper cylindrical part and rotates to generate centrifugal force, which will be more violent when it goes down to the conical part.

In this way, the solid particles or the denser liquid are thrown to the wall by the centrifugal force, and flow out of the bottom along the helical line of the wall.

The clear liquid, or lighter solids entrained in the liquid, rises and overflows from the center.

[The current separation factor has reached eight to one, indicating that my estimate of the density of the elemental substance is very close to the real value...]

Hong Fan excitedly thought of adjusting the helix, the shape of the cone, and the flow rate of the liquid again.

Experimental fine-tuning should have been a protracted and extremely involved process.

Even if it is a complete team with supply chain support, it takes several days to go through the links of design, mold making, casting, and testing from scratch.

But at this time in the Asahi Mansion, Hong Fan only needs to move a thought, and he can get instant feedback from Sand World.

Get a brand new test machine, but blink.

Huangsha is like the second layer of skin of Xingjun.

Hong Fan could feel the friction of every turbulent flow in the separator and the force of every spiral, all of which were as clear as lines on the palm of his hand.

The time goes from morning to evening.

Seven or eight hours of hard work, hundreds of attempts...

The impeller made of sand did not stop rotating until the insects were singing and the stars were boiling.

Yanliu Gong emits gentle heat to evaporate the residual liquid, leaving only pure and fine purple powder.

Hong Fan picked up a pinch of powder and brought it to his nose, but he couldn't smell the woody fragrance of cicadas.

Holding back his excitement, he strode back to the stone table and wrote down the last set of data with a carbon notebook.

The night wind blew through the court, blowing Hong Fan into a celestial state.

"It's done, it's done!"

He murmured and sat down on the ground.

PS: This chapter is well written.

The author has no knowledge of the field of materials and industrial design, and the part about separation was scratched after reading dozens of web pages.

It’s fine if everyone doesn’t understand it. The last chapter said that there are so many readers who understand it, it’s inevitable that Alexander…

All kinds of omissions, knowledgeable readers read it with a smile.

The next chapter is probably around eleven or twelve o'clock.

(End of this chapter)