Author: Huang Huoqing

The moonlight is wandering, and the night is still young.

Hong Fan habitually turned the charcoal pen with his right hand and silently recalled.

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

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

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

The former is obviously not suitable for separating and capturing jade.

Hong Fan only had a general understanding of the industrial technology of centrifugal sedimentation.

He knows the conceptual structure of butterfly and tubular separators, and knows that separation must take into account the physical and chemical characteristics of suspended matter - such as density, viscosity, strength, stiffness, surface tension, friction coefficient, adsorption equilibrium constant, dissociation constant, etc.

But just knowing this is not enough.

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

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

Smelting, casting, polishing and other processes are all extensive and profound - not to mention anything else, the making of molds alone is enough for an ordinary person to waste a lifetime.

However, Hong Fan's situation is different.

Owning the sand world is equivalent to having a universal mold that can be changed instantly, and can be fine-tuned at will without any blind spots.

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

A centrifugal separator based on density gradient, this design has high separation accuracy.

Based on the cyclone separator of the gas-solid system, the design has a simple structure and high efficiency.

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

In addition, there are butterfly discs used to expand the settlement working surface, etc.

It wasn't until the rooster sang at dawn that Hong Fan realized that his mental energy had been exhausted, so he put away the manuscript and went into the bedroom to take a nap for an hour.

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

Including precision balances, micrometers (screw micrometers), magnifying glasses, etc.

In Hong Fan's view, Dahua's development in engineering is obviously faster than 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 is successful in practicing the "Tianji Canon" is equivalent to a humanoid machine tool with low efficiency but perfect accuracy.

Therefore, it is possible to achieve what it is without knowing why.

A small amount of waste material is impact-ground with fine sand and turned into ten-micron particles of relatively uniform size.

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

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

The time has come to May 23rd.

Hong Fan finished writing with five charcoal pens and used an unknown amount of paper before finally completing the design work.

Next is the verification step.

Use Sand World to refine the sand to the controllable limit, 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, it’s 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 is given...

In addition, the more famous one is the sucrose gradient solution.

Raw materials are easily purchased.

The preparation method that I have heard of in the past is also relatively simple - after preparing the initial sucrose solution of different densities, just add it in batches.

However, perhaps because he lacked some technical know-how, what Hong Fan created was extremely unstable and could not be used in production.

The cyclone separator is the simplest to design, but the effect is not good in practice.

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

The calculation and simulation of fluid mechanics is extremely complicated and cannot be solved without the help of a computer; so Hong Fan can only repeatedly use sand molds to perform practical operations and use multi-stage blade control to adjust the air intake speed.

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

When the air speed is too high, eddy currents and backmixing will occur if you are not careful, which will in turn cause pollution.

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

One plan after another proved to be a failure.

It was not until May 26 that Hong Fan finally saw the light of day at the hydrocyclone separator.

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

The material liquid enters in the tangential direction from the upper cylindrical part and undergoes rotational motion to generate centrifugal force, which becomes more violent when it descends to the conical part.

In this way, solid particles or denser liquids are thrown toward the wall of the vessel by centrifugal force, and flow out of the bottom along the spiral line of the wall downward.

The clear liquid or the lighter solids carried in the liquid rise and overflow from the center.

[The current separation coefficient has reached eight to one, which shows that my estimate of the density of the element is very close to the real value...]

Hong Fan thought excitedly and made further adjustments to the spiral, cone shape, and liquid flow rate.

Experimental fine-tuning should be a long-lasting and extremely complicated process.

Even with a complete team with supply chain support, it would take several days to go through the design, molding, casting, and testing processes from scratch.

But at this time in the Asahi Mansion, Hong Fan only needed to think about it to get immediate feedback from the sand world.

Get a brand new test machine, just in the blink of an eye.

The desert sand is like Xingjun's second skin.

Hong Fan felt the friction of every turbulent flow in the separator, and the force of every spiral was as clear as the lines on his palm.

The time goes from morning to evening.

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

Only when the insects chirped and the stars boiled did the sand impeller stop rotating.

The Yanliu Gong emits gentle heat and evaporates the remaining liquid, leaving only pure and fine purple powder.

Hong Fan pinched a handful of powder and put it to his nose, but he couldn't smell the woody fragrance without cicadas.

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

The night wind passed through the courtyard, making Hong Fan feel like a fairy.

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

He murmured and sat down on the ground.

PS: This chapter is a big one to write.

The author has no knowledge about materials and industrial design fields, and he only read dozens of web pages about the separation part to make up his mind.

It's okay if everyone doesn't understand. As mentioned in the previous chapter, so many readers who understand have emerged, so Alexander...

All these omissions will be laughed off by knowledgeable readers.

The next chapter will probably be at 11 or 12 o'clock.
Chapter completed!