Wire for spn distillation columns 0.25 mm. Spiral prismatic nozzle (Copper)

In a distillation column, you can fill up a different nozzle and it will work, but in different ways. When choosing a filler for a column, it is necessary to take into account its characteristics (pipe diameter, its height). Fillers for distillation column there are different, the most popular of them: (SPN) Selivanenko spiral prismatic nozzle, (RPN) Panchenkov, Raschig rings, ordinary stainless steel kitchen washcloths, broken glass, etc.

The nozzle is necessary to keep the largest volume of reflux on its surface, as well as to allow the flow of alcohol vapor to pass freely. Interacting between failure phlegm and steam ensure the separation of the water-alcohol mixture into different fractions. Therefore, the larger the area at the surface of the nozzle, the better the separation will be.

1. SPN

Spiral-prismatic fillers have been invented quite recently. SPN Selivanenko was the first of them. Now some modifications of this nozzle have appeared, for example, the 10-sided SPN of Diogenes. Currently, the spiral prismatic nozzle is considered the best for use in home moonshine stills and distillation columns Oh. For household brew columns and distillers, it is better to use copper SPN, according to some reports, it softens the taste of the distillate.

The SPN is made of stainless wire with a thickness of 0.2, 0.25 and 0.3 mm. Consists of segments 4x4; 3.5x3.5; 3x3 and 2x2 mm prismatic spiral. The smaller the packing, the higher the quality of the resulting product, but lower productivity, and with a large packing, the selection rate increases, but the separation quality is lower.

The nozzle is poured into the column and lightly compacted every 10 cm, for this it is convenient to use the handle of a shovel. For a household column, it is easier to purchase a nozzle from a trusted seller, because There have been a lot of fakes on the market lately. The price of the SPN Selivanenko nozzle is about 1500-2500 rubles per liter, 1 liter, depending on the type of wire, weighs about 1.2 kg.

You can make SPN with your own hands at home. To do this, you need stainless steel wire, a winding device (usually a drill or a screwdriver), and the finished cut nozzle must be pickled.

Video how to do SPN with your own hands

2.OLTC

The second most popular Panchenkov nozzle used in home distillers and homemade distillation columns to increase the strength and increase the degree of purification of alcohol. On-load tap-changer (regular wire nozzle) was created at OAO Tupolev. This packing is highly efficient and is used in many expensive household distillers and river columns.

Convenient to use, the rolled nozzle is easy to insert and remove from the column for cleaning. On-load tap-changer is woven from stainless thread 0.13 mm thick. Zigzag weaving, very thin, the gaps between the threads are not more than 1 mm. It is used in pipes with an internal diameter of at least 30 mm. The regular nozzle has proven itself in home distillers.

3.Rashig rings

Rashig rings made of ceramic, metal or glass with a rough surface to keep the phlegm longer on the surface. This type has long been used in distillation columns. Raschig rings are less popular, but nevertheless they are used in many devices as a nozzle.

4. Washcloths

Most a budget option nozzles - ordinary kitchen washcloths for sinks, which are sold in any supermarket. Usually they are made of stainless steel, so they will be suitable as a filler for columns. Of course, the quality of alcohol will be an order of magnitude lower, and during distillation, changes in the taste and smell of alcohol may occur from washcloths.

Why is the menu in English?

Good day, dear guests of our site!

Lately, there have been a lot of questions about English letters on the site, I wanted to clarify the situation on this matter - unfortunately it is no longer possible to deal with them now, since the domain on which this site is made is located abroad and the company that owns it refused Russian-language support for the site, so the menu was translated into English, but we responded to these inconveniences and made a new website, its address SPN1.RU everything is in Russian, and for ease of use, a huge number of tasks have been implemented, starting with information about the SPN and an intuitive interface, and ending with help when placing an order.

What nozzle to choose?

When choosing a packing, everything depends on the characteristics of the future column, such as inner diameter- which, roughly speaking, is responsible for productivity, and height - responsible for the degree of purification, as well as the production tasks set for the column.

In any column, you can put any nozzle, and everything will work, another question is how .... therefore, when choosing, you need to be guided by the following rule: the smaller the nozzle - the higher the quality, but the lower the performance, and vice versa, the larger - the higher the speed selection, but worse separation.

I would also like to draw your attention to the fact that all the advice on the choice of SPN provided by our specialists should not be taken as a direct guide to action, and is just an introductory material within the framework of assistance in choosing a spiral-prismatic packing for distillation and mass transfer columns.

What is "stainless steel", chemical composition and properties?

Stainless steel or "stainless steel" is a complex alloy steel that is resistant to corrosion in aggressive environments. The main alloying element is chromium Cr (share in the alloy 12-20%). To enhance corrosion resistance, nickel (Ni), titanium (Ti), molybdenum (Mo), niobium (Nb) are also added to the alloy in various amounts depending on the required properties of the alloy.

The degree of corrosion resistance of the alloy can be determined by the content of the main elements of the alloy - chromium and nickel. If the chromium content in the alloy is more than 12%, it is already a stainless metal under normal conditions and in slightly aggressive environments. With a chromium content of more than 17% in the alloy, it is a corrosion-resistant alloy in aggressive environments (for example, in 50% concentrated nitric acid).

What kind of wire is the nozzle made of?

The nozzle is made of stainless wire grades 12X18H10T (AISI 321) and 08X18H10 (AISI 304), thickness 0.2 0.25 and 0.3 mm. With the purchase of each batch of wire material, a quality certificate is attached by the supplier, so you can be sure of the characteristics of the wire we purchase, and hence the quality of the nozzle we produce.

SPN heptahedron is made of stainless magnetic wire

brand 12X18H10T (X) (AISI 321).

Copper SPN is made of high quality copper wire 0.25 0.3 and 0.35mm. brand M1 of domestic production with a percentage of copper 99.95%.

Why is a heptahedron magnetic?

There is an opinion that "stainless steel" is not magnetized and, accordingly, the main test for "stainless steel" is applying a magnet to it. However, this is actually not the case, since there are so many magnetic grades of stainless steel, it is either magnetic (ferritic grade) or non-magnetic (austenitic grade). In this case, the magnetic properties do not affect performance characteristics stainless steel, in particular for corrosion resistance. The difference in magnetic properties is a consequence of the difference in the internal structure of the steels, which directly depends on the chemical composition of the stainless steel.

Food grade stainless steel?

"Food stainless steel" is a common expression, in our country there is no special State standard for "food stainless steel". Therefore, many find it difficult to say which grades of steel can be classified as "food" and which are not. So practically any existing stainless alloys can theoretically be classified as those that are suitable for storing or preparing food.

Nozzle sizes?

The nozzle consists of segments of a prismatic spiral, twisted from stainless wire material with dimensions of 5x5 4x4 3.5x3.5 3x3 and 2x2 mm. (the length of the segment is indicated conditionally and may differ by ± 20%, which does not affect the characteristics, performance and performance of the nozzle at all).

It is possible to manufacture nozzles according to your requirements: wire diameter, nozzle diameter, material, conditions are discussed individually.

How to make an order?

To order a spiral prismatic nozzle, you must specify through the form feedback(tab contacts), or by e-mail: [email protected]

• The size of the nozzle you are interested in, twire thickness, material (copper or stainless)
  

• Number of SPN
  

• FULL NAME. (fully)

• Address (with zip code)

• And also tell us the form of payment that is convenient for you and

Deliveries from those described in the tabs delivery and payment.

You can also place an order on our new website. SPN1.RU

What is the bulk density of the nozzle, and what is it?

The bulk density of the packing is the mass per unit volume of loose material. The bulk density of the packing is indicated on the site, taking into account slight shrinkage when ramming the SPN during loading into the column, and can vary ± 5-10%.

SPN made of stainless steel.

• 2x2mm. from wire 0.2 mm. ................................1500gr. in 1 liter.

• 3x3mm. from wire 0.2 mm. ................................1000gr. in 1 liter.

• 3x3mm. from wire 0.2 mm. (seven-sided) ......... 900gr. in 1 liter.

• 3x3mm. wire 0.3mm. ................................1500gr. in 1 liter.

• 3.5x3.5mm. from wire 0.25mm. .........................1000gr. in 1 liter.

• 4x4mm. wire 0.3mm. ................................1100gr. in 1 liter.

• 5x5mm. wire 0.3mm. ................................1000gr. in 1 liter.

SPN from copper wire

• 3x3mm. from wire 0.25mm. ............................... 1400 gr. in 1 liter.

• 4x4mm. wire 0.3mm. ............................... 1300 gr. in 1 liter.

• 5x5mm. from wire 0.35mm. ............................... 1200 gr. in 1 liter.

Why do we sell by the kilogram and not by the liter?

Our customers often ask the question - why do we sell SPN in kilograms, and not in liters like other manufacturers?

A kilogram in the case of a nozzle is a constant value, but a liter is not, if you simply pour it freely, the volume will be one, and if you shake it already another (it will decrease).

Delivery methods and cost?

Delivery in Russia is carried out transport companies(upon payment). Delivery to the mall is free of charge (the cost of delivery in Russia is on average 300 - 450 rubles).

For shipment by the Transport Company you will need:

• FULL NAME. fully.

• Delivery city.

• Passport details of the recipient (only the series and number of the passport).

• Recipient's contact number.

It is possible to send by Russian Post both cash on delivery and prepayment (the average cost is 300-500 rubles, depending on the weight of the parcel and the region, and the method of payment).

To send by Russian Post you will need:

• FULL NAME. fully.

• Recipient's address with index.

When sending by Russian post, the cost of delivery is added to the cost of the nozzle, since we pay it immediately upon delivery.

sending.

When sending by mail cash on delivery, upon receipt of the parcel, postage fees of 50 rubles are charged. for cash on delivery, and 4% of the amount of cash on delivery.

Sending to the near and far abroad is carried out by advance payment by Russian post, the cost is $ 10-30 (depending on the weight of the parcel and the country of the recipient).

Sending to Belarus, Armenia and Kazakhstan TK KIT and DPD is possible (the cost of Minsk is from 300 rubles, Astana is from 450 rubles).

Payment options?

When sending the nozzle by cash on delivery (by Russian post), payment is made at the post office upon receipt.

It is also possible to pay:

• Sberbank (as a transfer from card to card, and in any branch of Sberbank).
• Yandex money
  

• PayPal

• Western Union

• Golden Crown and Hummingbird (transfers from neighboring countries).

• Payment upon receipt by Russian Post, TK DPD or SDEK (cash on delivery).

• Cashless payments.

With these payment methods, sending is carried out both by Russian post and by transport companies at your request.

How quickly do we send the nozzle?

The company's rules establish the following terms for shipment and dispatch of goods - 2 times a week (every Monday and Thursday, if they do not fall on weekends or holidays), in practice, as a rule, everything happens faster - we send it as soon as possible, or on the day of payment, maximum the next day, it does not always work, but we try.

Etching, and mass fraction of etching?

Etching is a group of technological methods for the controlled removal of the surface layer of material from the workpiece under the action of specially selected reagents and equipment.

To improve the holding capacity and wettability, our packing is pickled, the mass fraction of pickling is 15-20%.

The copper nozzle is not etched, since copper is not an alloy, and therefore etching will not bring the desired effect.

Why do I need passport data when sending a shopping cart?

The requirement of the TC when sending and receiving goods, to provide passport data of both the sender and the recipient (the goods are issued according to the passport).

How many springs do you need for a tangle?

From 1 meter of confusion, on average, a wad of 30 - 40 mm is obtained. (depending on rolling density), a 2" sidebar will require 2 meters of spring per wad.

Why didn't they put a spring for the muddle?

When buying more than 3kg. of any nozzle as a bonus (free of charge), at the request of the buyer, we complete the package with a spring for the tangle (but not more than 5 meters), we kindly ask you to inform us when discussing the details of the order that the tangle is needed, and also how much it is needed (if you do not know how much, describe the characteristics we will complete the columns with the required quantity), since we do not put it to everyone indiscriminately, and not because it is a pity, but because someone does not need it at all, and we will put it in every parcel - this is definitely superfluous. Please do not grind your teeth, and do not knock yourself with your heels in the chest after receiving the parcel without springs (they say you bought more than 3 kg., But they didn’t put the confusion), if you didn’t bother to inform that you need it.

Also, a spring for a muddle can be purchased, when buying, the cost is 100 rubles. for 1 meter.

If you paid for a spring for making a tangle, but for some reason we didn’t send it, write, we’ll fix it (of course, we will take care of the shipping costs).

How to fall asleep and ram the nozzle?

The nozzle is poured in small batches of 100-200g. you don’t need to tamp in any case, you can shake it a little (without fanaticism), the SPN will compact a little, this will be enough, after a few shoulder straps you can open the upper part of the column and if the nozzle shrinks a little more, just fill it up.

Wholesale prices?

Prices for wholesale deliveries are discussed in each specific case, tell us what volumes and what kind of nozzles you are interested in (per week, month, quarter), we set an individual cost.

How to wash the nozzle?

Before loading the packing into the column, for the final removal of dust, oil, pickling products, etc. we recommend boiling it with detergent(add quite a bit - a few drops), wash off the fragrance, then boil in a soda solution, then rinse well in running water.

Copper SPN must be boiled in cycles first with detergent, and then to remove oxides with citric acid.

Whatever it was, everything else will be washed by the column at an increased pre-suffocation capacity with plain purified water.

Sent a request - supplier not responding?

If you were not answered, then most likely something went wrong when sending the application (the feedback form did not work correctly, it did not work mail server, the e-mail for feedback with you was not correctly specified), the letter went to spam.

There are several solutions - check the spam folder, carefully reviewing the list of letters, duplicate the application directly to the mail [email protected], send a request through the feedback form again carefully filling in the contact information necessary to contact you, you can also call the numbers indicated on the tab contacts numbers and specify the reason.

Owners Attention mailboxes GMAIL!!!

Recently, cases have become more frequent when this mail system throws our letters into SPAM, in connection with this we kindly ask you to check this section when you are waiting for a letter from us (calculation, information on ordering, sending, the presence of a nozzle, etc.) our letter still turned out to be there, for correct correspondence in the future, pull it out from there by clicking the "not spam" button.

A very long time ago, when we were just starting to sell our distillation columns, few people were interested in what their internal volume was filled with - the only thing that mattered was whether they gave good alcohol or not. Then a large tribe of do-it-yourselfers appeared, who were already interested in the type of nozzle (“Sulzer”, Levin nozzle (SPN), Steadman, Rashig rings), as well as the question: “what nozzle is the best?” . We, as best we can, explain these points on our website, but, unfortunately, not everyone hears us, and many still think that there is only one “super nozzle” for all occasions. Here is an example of a typical statement: "SPN-3 is cool!".

SPN is made by continuous winding of wire on a rotating pyramidal mandrel. A prismatic spiral descends from the mandrel, which is then chopped into elements. Bulk material from such elements is called a spiral-prismatic nozzle (SPN).

In SPN-3, the figure indicates the diameter of the circle described around the spiral, and at the same time, many are not even interested in the diameter of the wire from which it is made. But the diameter of the wire is one of critical factors effectiveness of SPN, although there are others. Let's try to figure it out. Recall that the distillation properties (or simply efficiency) of any packing are mainly understood as two of its characteristics, which determine the appearance of the column and its capabilities:

• nozzle throughput. Characterizes the relationship between the diameter of the column and its performance.
• separating power of the nozzle. It characterizes the relationship between the height of the column and its reflux ratio.

For a particular column, if we exclude from consideration the material and structure of the wire surface, the efficiency of the SPN is determined by its geometry.

Mandrel shape

In the manufacture of SPN, the wire is wound on a rotating pyramidal mandrel, the base of this truncated pyramid can be any "angular" geometric figure, which ensures the "self-adhesion" of the wire with the mandrel: plate, triangle, square, rectangle, rhombus, ellipse.

At one time, A.I. Levin and A.S. Zheleznyak introduced the dxL criterion to analyze the efficiency of a spiral-prismatic nozzle, where d is the size of the spiral face on the mandrel, and L is the length of the spiral element. Those. the helix geometry was “linked” to the mandrel geometry.

The shape of the base of the mandrel determines the shape of the future spiral, but not completely. Therefore, it is impossible to immediately say which shape of the base of the mandrel will provide the maximum efficiency of the packing obtained on it. Below, to simplify the explanation, we will consider mandrels with regular polygons at the base of the pyramid.

In our studies, as a criterion, we use the actual geometric characteristics of the packing elements resulting from its manufacture.

They are the ones who determine the effectiveness of the SPN.

SPN geometry

Angle at the top of the coil

Even if there are regular polygons (plate, triangle, square) at the base of the mandrel, the shape of the SPN made on them will still be very diverse. The spiral shaping begins at the base of the mandrel (a triangular base is shown in the diagram). With each turn, a new turn of wire lies on the base of the prism and squeezes out the previous turns from it. However, when the spiral leaves the mandrel, it unwinds due to the elasticity of the wire.

fig.1		Moreover, the unwinding occurs due to an increase in the radii at each bend of the wire, and the consequence of this is the "opening" of the corners at the tops of the bends in the coils. The degree of "opening" of the corners depends on: the diameter of the resulting spiral D; angle at the vertex of a regular polygon; radii at the vertices of the corners of the polygon; wire diameter d stiffness (elasticity, work hardening) of the wire; degree of tension of the wire during winding. Figure 1 shows a drawing of a “free” coil of a spiral. Its geometry (and the shape of the entire spiral) is completely determined by the angle φ at the vertices of each angle. It is important to note that due to the "opening" of the corners, the geometry of the coil can differ greatly from the geometry of the base of the mandrel on which it was obtained. Those. the coil, which is shown in the drawing, could be obtained both on a plate (Fig. 2) with a large “opening” of the angle - φ = 0º + A2 (very hard wire), and on a triangle (Fig. 3) with a small “opening” angle - φ=60º+А3 (very soft wire).
fig.2	fig.3

Spiral diameter and wire diameter

We placed the diameter of the spiral (D) and the diameter of the wire (d) in one section, since according to the theoretical formulas (and the results of experiments), both of these sizes affect both the free area of ​​the packing (an analogue of its throughput) and the specific surface area of ​​the packing (an analogue of its separating power).

For example, if the nozzle element has a diameter D=3mm, length L=3mm and is made of wire with d=0.5mm, then it is more correct to call the nozzle SPN-3x3x0.5, since, for example, SPN-3x3x0.3 has a higher throughput than SPN-3x3x0.5 at the same angle φ.

But, if we compare two SPNs with equal capacities (these are not equal diameters D), then the specific surface area will be higher for the nozzle, which is made of thinner wire.

Element Length

The spiral descending from the mandrel is cut into elements, the length or number of turns in which may vary. For some reason, it is believed that the length of the element L should be equal to its diameter L=D (or L/D=1). We will not argue about this, although it seemed to us in experiments that L / D = 0.75 is better.

Spiral pitch

It is believed that the step of winding the spiral should be equal to the diameter of the wire - winding coil to coil. However, to improve the efficiency of the nozzle, it is desirable to provide an interturn gap that does not exceed the wire diameter d.

But you have to make a "sacrifice". The fact is that, at a small d, it is technologically difficult to maintain the accuracy of the interturn gap. And its excess leads to deterioration operational properties SPN (tangling, excessive compliance of the layer), and as a result, a decrease in the efficiency of the nozzle (due to the ambiguity of laying, lateral penetration of neighboring elements into each other).

Appearance of SPN

Now, having understood the geometry of the turns, you can see how the appearance(shape) SPN depending on the angle φ at the vertices in the coil after winding (not in the mandrel!).

For ease of perception, the shapes of the nozzles in all pictures d, D and R are the same.

Note that the variants of SPN forms presented below are purely illustrative in nature, and some of them are practically not feasible.

φ=10º			φ=15º
φ=20º			φ=25º
φ=30º			φ=40º
φ=50º			φ=55º
φ=60º			φ=62º
φ=65º			φ=70º
φ=75º			φ=90º
φ=95º			φ=100º

The experiments performed show that for fixed d, D and R, the packing efficiency also depends on the shape of the helix, that is, the angle φ at the vertices in the coil.

If a couple of years ago there was a fairly active discussion of the topic “what kind of nozzle is better?”, Today this issue is practically closed. The appearance and development in practice of the SPN (spiral-prismatic nozzle) resolved these disputes quite unambiguously. Of course, even now the use of cut or uncut stainless steel washcloths as a nozzle remains relevant. But this option is hastily”and rectifiers using washcloths sooner or later come to SPN. Nevertheless, we will mention not only these varieties. What did they use before (and in some places still sometimes even today)?

1. Washcloths. Awarded first place for availability, low cost and pretty good results in use. When choosing washcloths, the main attention should be paid to the issue of real corrosion resistance. Therefore, you should not immediately buy a lot, you must first check the candidate. To do this, the washcloth must be “salted”, i.e. cut into pieces, sprinkle with salt and wrapped in a wet rag (or the rag needs to be soaked in brine), leave to lie down. If after a few days the rust does not appear - everything is in order, you can buy. According to the number of washcloths, it is necessary to proceed from the approximate packing density of 250-280 grams of washcloth per liter of the internal volume of the packed part of the column. You can fill both with whole washcloths, and cutting them into pieces. The density of the stuffing depends on the size of the cut (it is not particularly necessary to grind it - they crumble), and the quality of the separation depends on the density. Still, it will not be possible to achieve the maximum separation on washcloths.

Washcloths can also be used as a retaining “plug” when stuffing the column with other nozzles.

2. Raschig rings, balls, ceramics and other repeating elements. These types of packing have long been used in packed columns. The material from which the elements are made can be different - metal, ceramics, glass. The surface is better rough. In principle, a normal nozzle.

3. Sulzer nozzle, Panchenkov tap changer. This type of nozzle has long been presented by some manufacturers of household RK as an almost breakthrough solution. In fact, these nozzles have long been used in industry. Compared to the nozzles above, these two options (essentially the same) provide better separation and are slightly more productive.

Finally, relatively recently,

4. Nozzles SPN (spiral-prismatic). SPN Selivanenko was the first to appear on the market. At the moment, the topic of creating SPN is also developed by other manufacturers. A lot of work has been done to create specific SPNs to achieve various goals. At the moment, this type of nozzle is the best for use in domestic columns. According to the results of numerous experiments conducted by rectifiers, the best option in terms of versatility, results and cost is the use of a 10-sided SPN produced in Ukraine - the so-called Diogenes SPN.

You can also make SPN yourself, although for single use it is easier to buy from a reputable manufacturer. The price of a good nozzle on average ranges from 1,500 to 2,500 rubles per liter (1 liter of nozzle weighs about 1.2 - 2.1 kg, depending on the thickness of the wire). Recently I was at a construction fair, went into a pavilion with moonshine goods, so they asked for 1,500 rubles for 450 grams. This, of course, is nonsense. Here is a video on how you can make your own nozzle

Options for use as a bait broken glass I will not consider other ersatz substitutes, since for those who want to save money there are washcloths that give a completely predictable result and about the operation of which there are a lot of reviews.

What is the impact of the nozzle on the final result? The nozzle is designed to ensure good retention on its surface of the maximum amount of phlegm in the form of a film and at the same time ensure the passage of a sufficient steam flow. Indeed, it is during the interaction of steam and reflux that the separation of the alcohol-water mixture into fractions occurs. Thus, the larger the surface area of ​​the packing, the better, but the packing must not be too "tight" to prevent the vapor path from being blocked. As soon as the “flooding” of the nozzle with phlegm begins, steam bubbling through the phlegm will begin to occur and then choke will occur. Thus, there are several operating modes of the column: "film", "emulsifying" and emergency - choking. The most beneficial mode is emulsification. The main thing here is to find out at what indicators of the supplied power and selection it is in your column that it is possible to achieve a stable pre-choke, which, however, does not turn into a choke. For each column, these indicators will be different, since it is impossible to take into account all the nuances, such as heat loss, heater efficiency, etc.

About the nozzle, even just one SPN, you can write a lot of things, so if you have any specific questions, ask.

For the purity of home-made alcohol, distillers have learned to use all sorts of devices. Among them is the Selivanenko spiral-prismatic nozzle (SPN). In this article, you will get acquainted with the principle of operation of the nozzle, learn about its advantages and nuances.

The Selivanenko nozzle (SPN) is a device for distillation columns, a filter element that separates difficult-to-separate mixtures. Manufactured from high strength copper and stainless steel wire. It looks like a small spiral, curved at different angles.

It is used to improve the purification of moonshine from impurities - fusel oils (substances with a high boiling point). Helps to obtain pure alcohol, which is used for drinking, making homemade liqueurs, liqueurs and liqueurs.

Reinforcing film columns are filled with nozzles to produce alcoholic distillate, alcohol thanks to beer and distillation columns.

In order to keep the largest volume of phlegm on the surface, to allow the flow of alcohol vapor to pass freely, water-alcohol mixture is divided into different fractions due to the interaction between phlegm and steam.

Separation is directly dependent on the surface area of ​​the packing.

It is poured into a column and gradually compacted every 10 cm. For convenience, a shovel handle is used.

Is there an alternative?

It is worth paying special attention to the Panchenkov nozzles (OLTC). On-load tap-changer is another type of device that is used in home distillers and homemade distillation columns to increase the strength and degree of purification of alcohol.

It is made in the form of a grid with a special weaving of thin wires. To clean alcohol vapors, the principle of heat and mass transfer lies. This exchange occurs when two opposite flows collide - condensed phlegm and new vapors. Interacting, fusel oils return to the cube, and alcohol passes above. Tap changers are actively used in light industry.

Unlike SPN, OLTC is inferior to the first one in terms of its service life, tk. its weaving of thin wires is easily damaged and difficult to clean. But, at the same time, the cleaning ability of the SPN is lower than that of the Panchenkov nozzle.

So OLTC is more often used in expensive distillation and beer columns . RPN is easier to operate. SPN enables alcohol producers to significantly reduce the height of the distillation column. High wettability and hydraulic resistance of the material are one of the important indicators of packing efficiency.

Both varieties are market leaders. On-load tap-changers and on-load tap-changers have their own advantages, almost no disadvantages, except for service life or ease of cleaning. But if you treat them delicately, they will fulfill their purpose for a long time and regularly.

The video contains information about the difference between SPN and RPN:

Where to buy and how much?

As a rule, Igor Lvovich Selivanenko's spiral prismatic nozzle (SPN) can be bought in specialized stores for moonshiners and distillers. If there is no such store in the area, then at the moment you can easily order via the Internet. It is enough to enter a query in the search and the search engine will find hundreds of online stores of the necessary topics.

The cost ranges from 1500 to 3000 rubles (per liter). The price depends on the material and size.

SPN is not inferior in quality to its rival - the Panchenkov nozzle (RPN). SPN is not very dense and this allows it not to block the path of the steam. This type of development of a spiral-prismatic grid has a huge number of positive feedback from experienced moonshiners.