Once again about cryoblasting or just something complicated. Once again about cryoblasting or simply about the complex Application of cryogenic blasting

• Cleaning without the need to dismantle equipment – ​​reduces cleaning costs by 70-80%
• High-quality surface treatment with harmless CO 2 granules. Abrasive granules penetrate into all cracks and bends of equipment
• No secondary waste thanks to dry ice sublimation
• Safe for the environment. Since dry ice does not contain chemical detergents or solvents, no harmful compounds, substances or fumes are generated during operation.
• High operating speed (about 2-4 times faster than traditional cleaning methods)

Application of cryogenic blasting:

• Equipment: cleaning without damage and dismantling using the dry method
• Molds: cleaning without dismantling
• Utility networks: cleaning ventilation, shafts, etc.
• Disinfection of titanium cladding of reactors

Cryogenic cleaning technology uses high-pressure compressed air and dry ice pellets. Ice granules are not an abrasive material, that is, they do not damage the surface itself and carry not only kinetic, but also latent thermal energy. A sharp decrease in surface temperature causes a “thermal shock” effect, in which contaminants cooled to a brittle state peel off from the surface.

Dry ice cleaning is now widely used in Western countries, where a large number of enterprises operate using Cold Jet technology. This method is considered one of the most optimal for working with contaminated surfaces. By and large, in Western Europe and the USA, every third enterprise uses it.

Dry ice blasting is an effective and cost-effective method that allows businesses to increase production volume and product quality. It costs much less than traditional cleaning methods, no matter what technologies are used within these methods and methods. Only equally modern and innovative technologies that allow effective and high-quality cleaning of contaminated surfaces can compete with Cold Jet. Dry ice cleaning is second only to similar developments. All traditional technologies used by both domestic and foreign enterprises are significantly inferior to this method.

Dry ice cleaning is ideal for industries that need to continually clean the surfaces of a certain amount of their equipment. In this case, Cold Jet technology allows you to reduce the financial costs of this process and make it more efficient and effective.

An important advantage of cleaning surfaces with dry ice is that this method completely eliminates the possibility of damage to the surface being treated, due to the fact that it uses dry ice granules, which are not an abrasive. It must be taken into account that dry ice cleaning is a much gentler technology for cleaning surfaces. Thermal shock action, in turn, ensures high efficiency of the technology. Working with Cold Jet technology, the company significantly reduces the time required to clean surfaces. Dry ice leaves no waste to clean up.

Naturally, like any other technology, dry ice cleaning has its limitations. In particular, this type of work cannot be performed while the equipment being processed is under electrical voltage. In addition, not all hard-to-reach places can be cleaned using this method. Many of them cannot be reached with dry ice and you will have to use other methods to clean them. Of course, these points somewhat limit the use of this technology, but are not critical when choosing the method by which equipment will be cleaned at a particular enterprise.

As a rule, to treat surfaces using this technology, it is not necessary to remove the equipment from its place. The devices used for cleaning with dry ice are, as a rule, mobile in their mass and capable of operating in almost any conditions. So you can clean the equipment in any place convenient for you, even to the point that the cleaning will take place right in the workshop. In our catalog you can find the most modern

Cold Jet is one of the most advanced dry ice cleaning technologies available today. It provides high quality implementation of the task assigned to it and is perfect for enterprises from almost any field. Now it is already used by a significant number of manufacturers of a wide variety of products, who have opted for innovative technologies, inexpensive prices and ease of use. According to experts, this figure will only grow in the future. Cleaning with dry ice provides such an advantage that it is certainly competitive compared to any other traditional methods of cleaning equipment and surfaces.

Cryogenic blasting (from the word “blast” - to explode) is an effective, cost-effective, environmentally friendly and safe way to clean surfaces from various contaminants using a high-speed jet of dry ice granules.

Dry ice is a solid form of carbon dioxide (CO2) that is odorless, tasteless, colorless, non-conductive and non-flammable. The temperature of dry ice is -79˚ C. The raw material for the production of dry ice is liquid food-grade carbon dioxide (carbon dioxide), which is widely applicable to the production of various carbonated drinks.

Dry ice was first used in the United States in the late 70s. for removing paint from an aircraft fuselage. Ten years later, the technology has gained commercial acceptance and widespread use in Europe and the United States due to its versatility and economic feasibility. Dry ice is used by companies such as Mercedes, Ford, Bridgestone.

How it works?

Cryogenic cleaning technology uses high-pressure compressed air and dry ice pellets.

Cleaning with dry ice is similar to the cleaning process with plastic beads, soda or sandblasting, the main difference is that dry ice does not leave behind any residue. All that must be removed after cleaning is the substance removed from the surface being cleaned.

This technology is based on three physical factors:

1) The kinetic energy of granules, or the energy of their movement, has a permanent mechanical effect on the surface, colliding, removing contaminants;

2) thermal shock: granule temperature is about minus 79 WITH, and the temperature of the surface being cleaned is usually positive;

3) the “gas wedge” effect, which occurs due to the sudden evaporation of dry ice granules upon contact with a warmer surface (sublimation process).

What types of contaminants does it remove?

This technology copes well with most types of contaminants such as:

Dirt, oil, fat deposits, gasoline, tar, tar;

Toxic residues, soot, carbon deposits;

Glue, impregnating compounds, spraying;

Radioactive contamination;

Heavy metals;

Welding slag;

Lubricant for foundry molds;

Ink;

Varnishes, paints;

Algae, mucus, sea shellfish;

Mold and lichens.

The main advantages of cryogenic cleaning based on the use of dry ice granules.

1. Avoiding damage to the surface being cleaned;
2. No secondary waste after cleaning;
3. Saving operating time compared to manual cleaning, reduces equipment downtime by 80-95%;
4. Surface disinfection, reducing the growth of bacteria and mold;
5. Environmental Safety;
6. The mobility of cleaning devices, the technology allows you to clean equipment on the line, without dismantling or turning off the power supply;
7. Cleaning hard-to-reach places;
8. Electrical equipment cleaning;
9. Saving work space.

Areas of use

Printing industry. Cleaning of printing machines assemblies, individual parts, assemblies and mechanisms; after cleaning, printing machines take on a new look.

Foundry. Prompt cleaning of foundry molds from production deposits and contaminants.

Food industry. Cleaning ovens, molds and trays in the bakery and confectionery industries. Cleaning of smoking chambers, mixers and tanks in the meat and fish processing industry. Cleaning of conveyor belts and packaging equipment.

Energy. Preventive and major cleaning of equipment without dismantling and turning off the power supply: electric motors, generators, transformers, distribution boards, insulators, heat exchangers, turbines and other units.

Transport. Cleaning of hulls, propellers and ship machinery, cleaning of wheel sets and bogies, cleaning of locomotive equipment and engine components, quick cleaning of car interiors.

Processing of polymers and plastics. Cleaning of equipment for the production of polyurethane foam products. Cleaning molds for the production of PET bottles. Cleaning of tooling and equipment (injection molds, molds, presses, dies, screws) for the production of other plastic products.

Production of rubber products. Cleaning of technological equipment (molds) and equipment for the production of automobile tires and other rubber products.

Entertainment sector. Producing harmless smoke during recreational activities.

Other industries. Cleaning ventilation systems. Restoration of facades. Cleaning wooden surfaces. Preparing surfaces for painting.

Main requirements

The room where cleaning work is carried out must have natural ventilation (the gas generated during cleaning absorbs oxygen).

Now you don't have to be an industrial giant to enjoy cryogenic blasting technology. The Technical Gases company is already using this technology and invites you to evaluate it!

Blasting is blast cleaning of various types of surfaces using abrasives. When blasting, a mixture of water and an abrasive, which can be sand or a soft reagent, is supplied in a stream of compressed air. Under the influence of compressed air, a drop of water with a grain of abrasive sand inside accelerates and hits the surface. At the same time, water softens the layer of dirt, the abrasive destroys the dirt, and the remaining dirt is washed away by water. Depending on the type of abrasive, sandblasting of surfaces, soft blasting and cryogenic blasting are distinguished. Let's look at the applications and benefits of each of these types of cleaning.

Sandblasting surfaces

This technology has been known for a long time, but has become widespread in recent decades. Sandblasting is used in cases where it is necessary to efficiently, quickly and safely clean and prepare surfaces made of metal (sheets up to 0.3 mm thick) or hard minerals. The advantages of this treatment include the removal of complex contaminants and paint residues without damaging the surface, cleaning without creasing, and by using various abrasives, surfaces can be roughened to 1.25 microns.

For sandblasting and surface cleaning, not only sand is used, but also other abrasive particles.

After sandblasting, an important and rather labor-intensive processing step is collecting the used abrasive. Manual collection is irrational and expensive, so sandblasting machines are supplemented with vacuum equipment for collecting abrasive, which also collects dust.

Soft blasting (soda blasting, Armex blasting)

Soft blasting is an effective universal method for restoring and cleaning surfaces without the threat of damage. Used for cleaning metal, stone surfaces, tiles, plastic, wood, glass, washing windows and display cases. Unlike sandblasting, soft blasting uses only reagents that have a soft structure with low abrasiveness. Under the pressure of compressed air at high speed, their particles pass over the surface being treated and clean it of contaminants.

Using soft blasting technology (or soda blasting), surface corrosion of metals and alloys, paint, graffiti, soot, grease, oil, oil, glue, and mold spores are easily removed. The Cleaner company uses this cleaning method to eliminate traces of fires (destruction of soot, burning, getting rid of the smell of a fire), when cleaning entrances, removing efflorescence and mold on the facades of buildings, when cleaning swimming pools and food equipment, degreasing any surfaces, when cleaning workshops and production premises. Soft blasting does not damage parts, it suppresses the formation of rust, and reagents do not penetrate into engine and hydraulic parts.

Soft blasting can be used with minimal or even no water. The reagents used do not have a harmful effect on the environment. The cleaning speed is several times higher compared to traditional methods, and operating costs are more than 70% lower.

Cryogenic blasting

This is a new way to clean materials using dry ice pellets that are pressurized onto the surface. This method is widely used in the USA and Europe due to its versatility and cost-effectiveness.

Cryogenic blasting technology for cleaning surfaces is identical to the well-known sandblasting method. The difference is that ice granules are not abrasive, they do not damage the surface, do not leave secondary waste after cleaning, and the cleaning efficiency is enhanced by the latent thermal energy that is released when the ice melts.

The essence of the cryogenic blasting process is that the dry ice granules have a lower temperature than the surface they clean. A sharp decrease in surface temperature leads to a “thermal shock”, in which contaminants are cooled to a brittle state and peel off from the surface themselves. At the same time, it was confirmed experimentally that the object itself does not cool, and the mechanical properties of its structures do not deteriorate.

Cleaning surfaces using dry ice granules is used to clean ventilation systems, restore facades, and clean wooden surfaces. Cryogenic blasting is used for cleaning vehicles and machine components, cleaning ovens, baking trays and molds in bakery and confectionery production, cleaning smoking chambers and tanks in meat and fish processing shops, in the production of car tires for cleaning equipment and molds. In the energy industry, cryogenic blasting is used for major and preventive cleaning of electric motors, transformers, generators, insulators, distribution boards, heat exchangers, turbines and other equipment without turning off the power supply or dismantling.

Cryogenic blasting technology has been used in global cleaning since the 90s of the twentieth century. The technique is considered unique in terms of environmental friendliness, since it does not leave additional waste during operation and demonstrates a zero level of toxicity.

Dry ice has a temperature of -79 ⁰C. Small particles of such ice are fed under strong pressure onto the surface to be cleaned and, instantly freezing the dirt, beat it off. When they meet the surface, the pieces of ice evaporate without a trace. Thus, during the cleaning process using the cryogenic method, no waste production is created, except for the dirt that is collected.

Dry ice cleaning is effective for:

• fat and oil deposits;
• old growths of dirt;
• soot, soot;
• asbestos-cement deposits;
• lubricants;
• ink, paints and varnishes;
• radioactive contamination;
• traces of petroleum products;
• grass stains and organic mucus.

The technology is reminiscent of sandblasting, but unlike sand, dry ice granules are gentle and do not damage the surface. Disinfection occurs without the use of additional chemicals due to the high percentage of dirty particles removed (90%).

Cryogenic blasting has received a wide range of useful applications. Use it to clean:

• technical details and mechanisms;
• pipe-shaped structures (turbines, pipelines, coils);
• monuments and architectural structures;
• wooden products and buildings;
• automobile parts;
• metal, plastic, stone surfaces for painting;
• fences and surfaces of urban buildings from graffiti.

It is especially gratifying that, having a high efficiency, the method does not require lengthy preparation of the objects to be cleaned: mechanisms, machines, devices do not need to be disassembled before cleaning, and then dried or cooled.

Equipment for cryoblasting are compact mobile devices, similar to vacuum cleaners, taking into account the features of the technology. Instead of a brush, the cleaner holds in his hands a gun connected by a hose to the body of the machine. There are special containers for storing ice; you can carry spare volumes of working material into them. Let us remind you that during the cleaning process, dry ice evaporates without a trace; the cleaner can only dispose of the garbage collected at the site.

Popular equipment manufacturers:

• CRYONOMIC (Belgium) is the leader in the European production of cryoblasting devices;
• CryoSnow (Germany) - specializes in the production of devices for cleaning large areas;
• COLD Jet (USA) - equipment of various classes, including for domestic work on small areas.

In Russia, the Association of Special Equipment Owners (St. Petersburg) produces blasters for dry ice. Also located in the Russian Federation is the production of the German brand Carblast Fahrzeugtechnik GmbH.

Cryogenic blasting: price

The possibilities of cryoblasting are almost unlimited; prices for cleaning with dry ice in Moscow start from 1000 rubles per hour. During this time, you can remove dirt from 5 to 15 meters of various surfaces (depending on the degree of contamination).

When choosing a provider of advanced services, pay attention to the experience and level of technical equipment of the cleaning company. Real professionals will clean quickly, efficiently, and safely.

, frost, ice, from English. blast- explosion, explode) - the process of injecting dry ice granules under the pressure of an air stream onto the surface to be cleaned. In general terms, the method is similar to sandblasting and other types of blasting, only dry ice acts as an abrasive material.

Technology

During cryogenic blasting, dry ice hits the surface at a speed close to the speed of sound and creates mini-explosions on the surface, thereby repelling contaminants.

From the bin of the treatment plant, dry ice granules are fed through a dispenser into the pipe outlet. Due to the appearance of reduced pressure in the gun, dry ice granules are smoothly sucked into the gun, where they receive acceleration of up to 300 m/sec and are sprayed onto the surface being treated with a stream of compressed air.

The contaminated layer is subjected to lightning-fast cooling (-79 °C), becomes brittle and separates from the surface (thermal effect). Subsequent spraying of granules completely removes its residues (mechanical effect).

Unlike known sand treatment methods, in this case the treated surface receives absolutely no damage.

Carbon dioxide is approximately 800 times larger in volume than dry ice, so sublimation within a few m/sec causes a micro-explosion at the point of impact.

When they collide with the surface being cleaned, dry ice granules with a temperature of −79 °C, turning into a gaseous state, completely evaporate, leaving only the removed contamination.

Thus, there is no need to waste time and money on disposal of the sprayed substance.

According to GOST 12162-77, dry ice is non-toxic, explosive (if you mix a lot of dry ice with a small volume of water), and does not conduct electricity.

Application

• restoration of facades and monuments.
• cleaning of assembled machines and equipment, individual parts, assemblies and mechanisms.
• preparing the surface for painting.
• cleaning injection molds, molds, presses, dies, screws.
• cleaning of wheel pairs, bogies, equipment and engine units of locomotives.
• preventive and major cleaning of equipment without dismantling and turning off the power supply: electric motors, generators, transformers, distribution boards, insulators, heat exchangers, turbines and other units.
• cleaning ventilation systems.
• cleaning wooden surfaces.

Cryogenic blasting removes:

• dirt, oil, fat deposits, gasoline, tar, tar
• toxic residues, soot, carbon deposits;
• glue, impregnating compounds, spraying;
• radioactive contamination;
• heavy metals;
• welding slag;
• lubricant for foundry molds;
• ink;
• varnishes, paints;
• algae, mucus, sea mollusks.

Advantages

• Increases the service life of the equipment, since cleaning with dry ice can be carried out without disassembling the equipment, cooling and drying.
• Reduced waste volume as dry ice evaporates after contact with the surface.
• Environmental Safety. Because dry ice particles are created by converting liquid carbon dioxide (CO2) into snow, they disappear upon contact with a surface without releasing toxic substances into the environment. Dry ice is non-toxic.
• High cleaning speed.
• Non-abrasive, non-flammable and non-conductive cleaning method.
• Eliminates the risk of equipment damage. Cryogenic blasting is a non-abrasive and non-corrosive procedure; when using it, no potholes are formed, the surface is not erased or damaged.
• Prevents the appearance and growth of bacteria and mold. Due to its extreme temperature of −79ºC, dry ice immediately kills bacteria and fungi on contact. During cleaning, disinfection occurs without the use of chemicals, toxins or additional agents.

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Literature

• “Blasting: A Guide to Highly Efficient Abrasive Blasting Cleaning” - Ekaterinburg: OOO Publishing House Origami, 2007-216 pp., ISBN 978-5-9901098-1-0

Links

www.youtube.com/watch?v=jiQ1YRHW3pg

An excerpt characterizing Cryogenic blasting

“War is the most difficult task of subordinating human freedom to the laws of God,” said the voice. – Simplicity is submission to God; you can't escape him. And they are simple. They don't say it, but they do it. The spoken word is silver, and the unspoken word is golden. A person cannot own anything while he is afraid of death. And whoever is not afraid of her belongs to him everything. If there were no suffering, a person would not know his own boundaries, would not know himself. The most difficult thing (Pierre continued to think or hear in his sleep) is to be able to unite in his soul the meaning of everything. Connect everything? - Pierre said to himself. - No, don't connect. You can’t connect thoughts, but connecting all these thoughts is what you need! Yes, we need to pair, we need to pair! - Pierre repeated to himself with inner delight, feeling that with these words, and only with these words, what he wants to express is expressed, and the whole question tormenting him is resolved.
- Yes, we need to mate, it’s time to mate.
- We need to harness, it’s time to harness, your Excellency! Your Excellency,” a voice repeated, “we need to harness, it’s time to harness...
It was the voice of the bereitor waking Pierre. The sun hit Pierre's face directly. He looked at the dirty inn, in the middle of which, near a well, soldiers were watering thin horses, from which carts were driving through the gate. Pierre turned away in disgust and, closing his eyes, hastily fell back onto the seat of the carriage. “No, I don’t want this, I don’t want to see and understand this, I want to understand what was revealed to me during my sleep. One more second and I would have understood everything. So what should I do? Pair, but how to combine everything?” And Pierre felt with horror that the entire meaning of what he saw and thought in his dream was destroyed.
The driver, the coachman and the janitor told Pierre that an officer had arrived with the news that the French had moved towards Mozhaisk and that ours were leaving.
Pierre got up and, ordering them to lay down and catch up with him, went on foot through the city.
The troops left and left about ten thousand wounded. These wounded were visible in the courtyards and windows of houses and crowded in the streets. On the streets near the carts that were supposed to take away the wounded, screams, curses and blows were heard. Pierre gave the carriage that had overtaken him to a wounded general he knew and went with him to Moscow. Dear Pierre learned about the death of his brother-in-law and about the death of Prince Andrei.

X
On the 30th, Pierre returned to Moscow. Almost at the outpost he met Count Rastopchin's adjutant.
“And we are looking for you everywhere,” said the adjutant. “The Count definitely needs to see you.” He asks you to come to him now on a very important matter.
Pierre, without stopping home, took a cab and went to the commander-in-chief.
Count Rastopchin had just arrived in the city this morning from his country dacha in Sokolniki. The hallway and reception room in the count's house were full of officials who appeared at his request or for orders. Vasilchikov and Platov had already met with the count and explained to him that it was impossible to defend Moscow and that it would be surrendered. Although this news was hidden from the residents, officials and heads of various departments knew that Moscow would be in the hands of the enemy, just as Count Rostopchin knew it; and all of them, in order to relinquish responsibility, came to the commander-in-chief with questions about how to deal with the units entrusted to them.
While Pierre was entering the reception room, a courier coming from the army was leaving the count.
The courier hopelessly waved his hand at the questions addressed to him and walked through the hall.
While waiting in the reception area, Pierre looked with tired eyes at the various officials, old and young, military and civilian, important and unimportant, who were in the room. Everyone seemed unhappy and restless. Pierre approached one group of officials, in which one was his acquaintance. After greeting Pierre, they continued their conversation.
- How to deport and return again, there will be no trouble; and in such a situation one cannot be held accountable for anything.
“Why, here he is writing,” said another, pointing to the printed paper he was holding in his hand.