Spray booths with dry filter. Filter for a spray booth Do-it-yourself spray booth with a dry filter

Painting a car is not an easy task; it requires at least a special room. Plus, professional equipment for painting a car is expensive - all this discourages those who want to start a painting business, although this business is considered very profitable. As usually happens, everything necessary equipment It is assembled gradually, and an ordinary garage is used as the main room. Alternative option is a self-made paint booth. With proper and skillful design, it will not be inferior in its characteristics to that purchased at a specialized center. You can learn how to make it yourself from this article.

Basic requirements for a spray booth

The main rule that must be followed is a warm room with insulating walls. They are required to maintain a constant temperature inside of about 20-25 degrees, this applies to both the air and the surface of the car. Fulfillment of this requirement is necessary for conducting quality technological process. Therefore, when arranging such premises, such as paint booths for cars, the designer is recommended to carefully consider how to achieve the required temperature - this could be an air heating system, good thermal insulation, etc.

You can warm up the air using powerful heating elements, but to maintain desired mode There is no substitute for thermal insulation. The temperature difference should not exceed 3 degrees during the entire drying time. Sudden heating and cooling of the painting chamber is highly undesirable.

A paint booth, which you can do with your own hands with high quality and without unnecessary overpayments, needs high-quality lighting. It should be everywhere, especially carefully highlighted workplace. To create daylight, you need to combine different lamps. In addition, it is necessary to provide shadow-free lighting in the central area of ​​the painting room. In the work box, flickering lamps and too cold or warm shades glow. It is advisable to give preference to explosion-proof lamps, otherwise conventional lamps will have to be additionally insulated and protected from splinters entering the room and onto the painted surface of the car. The quality of painting directly depends on the purity of the air and its pressure; in this case, a good ventilation system will help.

Thermal insulation of the spray booth

To keep the room warm, it is better to use polyurethane foam. Sometimes the box is equipped with foam plastic slabs, the gaps between which are filled with construction foam and subsequently lined with sheets of iron, plastic panels etc. Before you make a spray booth with your own hands, you must remember that both of these materials are flammable. In addition, polystyrene foam is easily destroyed when exposed to aggressive substances such as solvent or gasoline. Sometimes used for thermal insulation mineral wool or non-combustible materials. Everyone knows that after finishing the car painting procedure, it is necessary to clean the room. Therefore, the walls should not only be fireproof, but also easy to clean.

Paint booth lighting

Any device spray booth with your own hands will not be able to function efficiently without good lighting. The best option are halogen lamps. For safety reasons, they are isolated in separate boxes or secured under special glass.

Fluorescent lamps are no less popular, especially since there is no need for their additional protection. They can be placed on the walls or ceiling. Portable lights are used to illuminate the underside of the vehicle.

What should you consider when designing a spray booth?

Most often, a paint booth is made from an ordinary garage, so it is extremely important to take into account safety rules, because painting is a dangerous procedure that can lead to an explosion. The following rules must be followed:

1. The heater must be located in a separate room in a special box. Then the warm air will enter the chamber already heated, and the heating elements will not be able to ignite a cloud from the paint sprayer, which could lead to an explosion.
2. When setting up a paint booth with your own hands, you need to use the simplest methods for drying a painted car. It is better to use infrared lamps. It is advisable that they be plugged into regular outlets.
3. Separate RCDs are required for the socket group, generator and welding machine. You need to calculate the total power consumption of electrical energy in advance, or better yet, contact an electrician.

Ventilation system design

The ventilation system for a spray booth is an essential element of its design. It consists of a complex configuration of air ducts, various valves and fans. In addition, the ventilation of the spray booth must be combined with filters for air purification and a room heating system.

The ventilation system performs several functions at once, here are the main ones:

1. It filters and purifies the air, thanks to it, air vapors and gas emissions from paint and solvent escape.

2. Ventilation ensures safe work; air after filtration does not harm the environment.

3. She organizes safe work. A properly designed supply air ventilation system, even in a limited and enclosed space where a large amount of toxic substances is concentrated, ensures a safe cleaning process. The risk of fires and explosions is minimized.

4. The system provides hot air and drying. When directly painting a car, the ventilation of the paint booth with your own hands performs its main functions, and also creates streams of hot air that speed up the paint drying process, and hot airflow better bonds the layers of paint and varnish together.

Types of paint boxes

Well-thought-out and correctly calculated ventilation can not only influence the quality of the car's future paint job, but also save electrical energy and reduce the cost of necessary filter replacements. All this must be remembered, especially when setting up a paint booth with your own hands.

There are several types ventilation systems, they all depend on the purpose of the painting boxes:

1. Air-passage ventilation chambers. The principle of operation of this ventilation: the air flow comes with constant pressure, preventing any debris from entering it. The space must be absolutely sealed.

2. Chambers with high pressure or rarefied air. They represent two working fans. One pumps air, the other sucks. Their joint work produces the necessary pressure difference. This ventilation is suitable for open paint booths without walls.

3. Single-motor cameras. Operating principle: air is supplied from outside from above and naturally squeezes paint vapors through the lower openings of the spray booth. This type is quite suitable for homemade boxing, which is a self-made paint booth.

4. Dual-motor cameras. Fresh air comes from above, an additional motor pumps out the air from below and removes it from the room. This system very effective, but this expensive equipment is suitable for painting production cars.

5. Chambers with supply and exhaust ventilation. This system is designed together with a heating and filtration system.

Filters for spray booths

The spray booth must be safe. The presence of dry filtration of air masses will help prevent a fire or explosion. Even when installing a water curtain, the use of dry filters is still relevant. Indoors, it is much more rational to use filters for spray booths in the form of rolls. They are fiber impregnated with a special anti-flammable compound. This material covers the entire ceiling of the chamber.

Floor filters get dirty much faster and more heavily, which means they must be made of better quality. There are two types of filtration:

1. Fiberglass roll material. It is non-flammable, and its use is designed for a certain number of times.

2. Inertial filters for spray booths, which mechanically separate large solid particles of debris when there is a sharp change in the direction of air flow.

Additional cleaning

If you clean filter systems correctly and in a timely manner, you will not have to change consumables frequently. Fine cleaning consists of additional large-volume pocket filters. They are installed in the air duct. To save space, you can use cassette panels at the outlet or mesh filters to collect microscopic aerosol substances inside.

DIY filtration system

When designing a treatment system, it is necessary to take into account its location. It is better to install coarse filtration, only then can you begin installing the ceiling filter. If the ventilation of the paint booth with your own hands works on the principle of air recirculation, then it is necessary to install several cassette filters inside it that have a high accuracy class. They must match the type and design of the ventilation system. It is advisable to have a system operating hours sensor. It is recommended to regularly clean and blow the filter surfaces. All of these actions extend the life of the filtration system.

Powder painting booth

Many people use powder paint during their work. This is a mixture of fine particles with the necessary impurities. A self-made powder coating booth is a complex project, but quite feasible. It is necessary to purchase special equipment, without which the painting process is impossible. It is not economical to use such boxes in small repair shops, since the equipment is quite expensive. In addition, in these boxes it will not be possible to carry out the necessary tinting.

The powder chamber consists of filtration and paint composition recovery systems. Before starting, the mixture is magnetized, it sticks to metal surface car in a dense and uniform layer. Next, the paint layer is sintered; for this, the car is heated to a certain temperature and held for some time. The powder melts under the influence of high temperature, thus painting the car. The powder chamber greatly reduces the cost of painting a car. The remaining composition is collected by filters and can be used again in the production process.

Haste is unacceptable in setting up a paint booth, especially when it is being done with my own hands. If errors need to be corrected, the workflow will be stopped and this will lead to the loss of clients. In the presence of huge selection With modern equipment and materials, this article will help you make a paint booth with your own hands, which will soon bring in a good income.

Having calculated the ventilation in the room reserved for painting work, the designer receives a static picture that gives a good approximation only in the first days of work. Filters tend to become clogged, disrupting circulation and reducing the efficiency of supply and exhaust fans. Therefore, the placement of ceiling and floor mats should allow for quick replacement, and the filtration system should allow for step-by-step particle screening.

The air from the street and the air coming out of the painting booth have different types of pollution. Accordingly, effective cleaning requires different types filter materials at each screening stage. Based on their functional characteristics, there are three types of roll materials:

1. Coarse filter – installed externally, designed to separate large particles from the air.
2. Fine cleaning – protecting the room from dust, installed directly on the ceiling of the painting room.
3. Floor-standing – protection environment, as well as exhaust fan elements from waste associated with painting work.

According to European standards (EN 779 method), coarse cleaning can be considered the separation of particles up to 10 microns in size from the air flow (EU1 - EU4). Fine cleaning involves filtering particles up to 1 micron in size (EU5 – EU9). However, depending on how dust and material are separated, spray booth filters can last anywhere from a few months to a year. Filter elements are replaced at professional stations once every 8-12 months, but usually station owners do not skimp on expensive materials.

Large particles are separated using a conventional polypropylene mesh or a combination thereof. With internal filtration the situation is more complicated. Some craftsmen prefer to make do with a self-made non-woven filter, but it gets dirty very quickly, so the savings in this case are highly questionable. When purchasing a ceiling cleaner, you should pay attention to the following parameters:

• Cleaning class (index EU or F).
• Average holding capacity (indicated as a percentage for an air flow of 3400 m³/h).
• The final and initial pressure difference created by the material (in Pascals).
• Fire resistance.
• Dust holding capacity.

A good filter material (dry cleaning), before the pressure drops to 80 Pa, is capable of retaining up to 0.3-0.5 kg of contaminants per 1 m². This result shows the most common material for filtering indoor air - polyester fibers. They are bonded to each other by heating, and the sides of the roll are strengthened reinforced mesh(sometimes the roll is stitched with mesh), the quality of which also affects the price. Anti-pilling impregnation, to which dust simply sticks, can increase the filtration efficiency.

Floor filters

Filtration of paints and varnishes contained in the air leaving the chamber requires other approaches, and the most effective of them is water curtain. Harmful substances from paint and varnish mist are easily retained by water, but designing a chamber with a built-in water curtain is quite problematic and expensive, so a hydrofilter for the spray booth is often used in paint booths.

As the name implies, the active element of this design is a box with water. Most often it is a horizontal box made of polypropylene (sometimes made of galvanized steel), installed outside, on the ventilation outlet pipes.

Substances dissolved in water must be removed, otherwise their accumulation will lead to the fact that such a filter will not be cleaned or will simply become clogged with paint particles. To do this, a special substance – a coagulant – is added to the circulation system of the spray booth’s hydraulic filter. A chemical reaction with it leads to the precipitation of dissolved contaminants into a sediment that is removed mechanically.

Two other filtration methods are pocket filter systems (FYAC) and cardboard filter systems. The advantage of the former is their compactness and the ability to pass a large volume of air per m². Cardboard systems are an artificial labyrinth made of corrugated cardboard. The structure of the cardboard is such that the flow passing through it forms small vortices, from which heavy paint particles fly out by inertia and stick to the walls of the pockets (due to the principle of operation, such filtration is sometimes called inertial). The cardboard system is inexpensive (3-4 thousand for a roll of 10 m²), but often requires replacement. For comparison, a floor-mounted fiberglass filter, usually installed in a concrete chamber pit, costs approximately 1-2 thousand rubles per m².

Painting cars yourself is a responsible procedure that requires compliance with a number of conditions. A specialized camera for painting a car with your own hands - this option is chosen by many car enthusiasts today. Purchasing such an object will not be cheap, so some people prefer to independently provide what a do-it-yourself paint booth requires - drawings, materials, assembly.

Painting a car in this way has a number of serious advantages over using a spray gun in your own garage. Due to the tightness, you don’t have to worry about foreign particles of dust and dirt getting onto the painted surface.

In addition, the design eliminates the occurrence of unwanted air turbulence, due to which the enamel will not adhere to the surface properly, causing streaks, pimples and other defects to form.

Do-it-yourself painting is profitable, but you will have to work hard to build it. With a competent approach and a conscientious attitude to work, you will be able to build a car painting booth yourself, which will help you avoid serious financial expenses and organize everything to your liking. Below we will look at how to make a spray booth with your own hands, and what steps are needed for this.\

First stage

Before you build a paint booth with your own hands, you should imagine what it will look like and prepare everything you need. Draw a project on paper that shows the future paint booth along with all its components to scale:

• premises;
• heat generator;
• heat gun;
• ventilation system.

These are the main points, each of which includes many smaller elements - doors, thermal insulation, lighting system, etc.

Spray booth room

Let's talk about the premises

Before you make a paint booth with your own hands, you look for a suitable room. This could be a metal garage or a large workshop - the main thing is that you have the space and the ability to equip everything accordingly.

A car painting booth must have walls that meet a number of requirements:

• fire resistance;
• tightness;
• possibility of periodic washing;
• presence of thermal insulation.

The last point is especially important if we are talking about a garage with steel walls - you will have to make them double and put a layer of basalt wool or other fire-resistant heat-insulating material.

The room must be sealed

Be sure to pay attention to the floor - it should allow air flow to circulate freely. For this purpose, make a covering in the form of a multilayer lattice - this way, normal air outlet and air flow will be ensured from below.

Two doors are a must fire safety. They should open easily to allow for urgent evacuation in case of fire, and sealed to prevent dust and foreign particles from entering the room.

The dimensions of the chamber must be sufficient so that the master does not have any obstacles to free movement during his work. Concrete or metal carcass. An exhaust mechanism with filters and valves is installed under the floor surface. Consider the need for walkways to move around.

Paint booth with water curtain on doors

Lighting is important

In the process of painting cars with your own hands, one of the very important roles room lighting plays. It needs to be bright enough, comfortable for the eyes, and not produce shadows or glare.

Practice shows that the most convenient option will be fluorescent fluorescent lamps - they are placed on the ceiling. To ensure sufficient visibility of the lower part of the machine, several oblong lighting sources are hung along the walls.

Fluorescent fluorescent lamps

An equally effective solution to the lighting problem will be LED lamps. This type of lighting is becoming increasingly popular due to a number of advantages that LEDs have over other options:

• bright high-quality lighting;
• minimal energy consumption;
• low operating temperature;
• reliability;
• durability

Today you can easily install LED lighting in a room - it will cost a little more, but the result is worth it.

Without providing high-quality lighting, you will not be able to fully control the painting process, which will negatively affect the final result of the work.

Correct lighting in the paint booth

Room ventilation, air purification and drying

A do-it-yourself paint shop is built taking into account all the requirements of painting technology and safety. Properly arranged air ventilation plays a key role here. It is responsible for purifying the air, as well as ensuring that paint mist is properly deposited and removed.

Depending on what principle is used in the room ventilation system, two types of chambers are distinguished:

• with one motor;
• with two motors.

In the first case, air is supplied to the room from above, and the fog settles down - the necessary pressure is applied to it. Finally it is discharged through an individual channel arranged for this purpose. In the second case, one of the motors pumps air, the second sucks it out, removing it from the chamber.

Spray booth ventilation

The design will require high-performance ceiling air filters to eliminate the possibility of foreign particles entering the painting area. For this purpose, it is recommended to choose air filters operating in two-phase mode - in the first phase they remove large species pollution, in the second – small ones. It is important to take into account that it is necessary to clean both incoming and outgoing air flows. Filters installed at the bottom clog faster and will have to be replaced much more often.

The installation of filters should provide for the possibility of turbulence in the air flow with enamel particles - to do this, you need to correctly position them around the perimeter of the room and take into account the air pressure.

After painting, the car will need to be dried - a special device is installed for this. For drying, a heat generator is used, which operates on advantageous form fuel. Some use it for this purpose infrared heaters. The main requirement for drying is a uniform supply of heat to avoid overheating.

Supply and exhaust ventilation in the painting booth

Some more useful information

In order to complete interior decoration, use non-flammable materials - for example, metal. You should not choose an option such as lining, as the risk of fire increases. Depending on how correctly they are performed Finishing work, it will be possible to evaluate the degree of tightness, which is important to avoid the entry of dust and foreign particles. Give preference to smooth, easy-to-clean surfaces - this will simplify the cleaning process.

Think about the premises where inventory, paints, professional equipment, safety equipment, and workwear will be stored.

The work of painting a car is simplified by the presence of automatic process control. This, of course, will affect the cost of the entire project, but, on the other hand, you will receive a number of invaluable advantages. The automatic control panel must have a panel made of durable, reliable material. It should be easy to use, ergonomic and comfortable. Consider the ability to quickly switch between manual and automatic modes.

Conclusion

Building a specialized paint booth for a car is a labor-intensive process that will require large quantity strength and energy. You will have to monitor information about existing options and, based on them, come up with your own project - you can take any ready-made solution as a basis.

The process of working on the implementation of a project is difficult, but interesting - here you will be able to use your creativity, imagination and ability to cope with difficulties.

Education: secondary specialized. Specialty: car mechanic. Professional diagnostics, repair, maintenance of passenger cars of foreign production 2000-2015. Extensive experience working with Japanese and German cars.

A paint booth is a room equipped for car painting work. One of the key factors affecting the usability of a spray booth is the ventilation system.
The size of the hood directly depends on the size of the paint job

During the process of painting a car, fumes that are toxic to the human body are released from the paint and the solvent added to it; a paint mist is formed, which impairs visibility and settles on the body vehicle. The supply and exhaust system replaces exhaust air with fresh air, providing optimal conditions for painting a car.

From this article you will learn what a paint booth hood is, what filters it comes with, and how to calculate the ventilation yourself. We will also provide instructions, following which you can arrange the hood in the paint box yourself.

Types of ventilation systems and their comparison

Painting a car is work involving the use of toxic substances, the application technology of which requires compliance temperature regime and maintaining air purity at a given level. The hood not only affects the safety of the painter, but also the quality of the painting process and polymerization of the applied coating.

A garage hood for painting must meet the following requirements:

• Air supply temperature when painting is 20-30 degrees, air temperature when drying the coating is 50-85 degrees;
• The speed of the air flow is 1.3-1.5 m/sec (if the speed is excessive, the paint sprayed by the spray gun is carried away by the air flow, which interferes with the work);
• The air renewal rate in the box is 5-150 volumes/hour (to accurately determine the required rate, the ventilation of the production room is calculated);
• The air pressure in the box is 20-30 kPa higher than natural Atmosphere pressure environment;
• The flow forced into the chamber is clean, free of dust and mechanical pollution(an air filter is used for cleaning);
• The air flow moves from top to bottom, or with minimal vertical deviation.

Based on the type of ventilation, paint booths are classified into two groups:

1. Single-engine;
2. Twin-engine.

Single-motor plenum performing forced discharge fresh air into the box, while exhaust air is pumped out naturally due to the pressure difference inside and outside the chamber. The supply openings are located in the upper part of the room, the air flow entering the box deposits the paint mist downwards, then the fumes enter the exhaust nozzle and are discharged outside.

In twin-engine boxes, ventilation is provided by forced submission and air intake from the chamber, which provides effective circulation and a high air exchange rate.

It is rational to choose a specific type of ventilation based on the size of the box and the volume of work carried out in it. If the chamber is used throughout the whole working day, and dozens of cars pass through it, it makes sense to install dual-motor ventilation. In small-sized boxes, it is advisable to use single-motor systems - productivity will be sufficient, in addition, you will save on the initial cost of equipment and subsequent maintenance.

Supply and exhaust ventilation

A type of dual-motor systems is a supply and exhaust hood, operating in 3 operating modes:

1. Circulation inside the chamber - air is pumped out of the box, passes through a layer of filters and is pumped back into the room. Used when cleaning the chamber before starting painting work;
2. Supply from outside - the supply compressor takes air from outside the box, filters it and passes it through the heat generator, where the air is given the required temperature. The flow is supplied to the chamber, after which the exhaust compressor pumps the exhaust air out. Used in the car painting process to eliminate paint mist;
3. Recirculation with heating - the air taken from the chamber is filtered, passed through a heat generator with heating to a given temperature and supplied back to the box. Used to maintain temperature conditions when drying the body surface after painting.

Supply and exhaust ventilation requires precise positioning of the input and output air ducts, since if the ducts are incorrectly positioned in the box, “blind zones” are formed in which air circulation does not occur. They contain suspended paint particles - paint mist, which subsequently settle on the surface of the body, which negatively affects the quality of the final coating.

The calculation of supply and exhaust ventilation consists of determining the volume of air supply that provides the air exchange rate necessary to reduce the concentration of toxic paint fumes (MPC) in the room to the standard level.

Industrial spray booth

The amount of paint evaporation depends on the type of solvent added:

Calculation of supply ventilation based on the air exchange rate is carried out using the formula K = d*S*H, wherein:

• d is the required air exchange rate of the room;
• S - box area (m2);
• H - box height (m).

In force regulatory documents There are no standards for the rate of air exchange in paint booths, but experts recommend calculating the supply ventilation of the room based on a rate of 5 (for partial painting) and 150 (for complete repainting of the body).

An example of calculating air exchange in a paint booth with an area of ​​4 * 7 m and a height of 4 m using the multiplicity formula (taking into account the maximum value of 100) is as follows:

• K = 150*28*4 = 16800 m 3 /hour;

Manufacturers of paint booths take into account an air supply reserve of 25-30%. Factory chambers of similar sizes have an air exchange of 20-25 thousand m 3 /hour (800 m 3 /hour for each m 2 of box area).

The calculation of air exchange, ensuring a reduction in the maximum permissible concentration to the norm, is carried out using the formula: , wherein :

• W is the amount of harmful fumes from paint per 1 hour of operation (mg/h);
• Kv - maximum permissible concentration of evaporation in the air inside the box (mg/m3);
• Kp - maximum permissible concentration of evaporation in the supply flow (when air is taken from outside the chamber = 0).

Harmful fumes per 1 hour of operation are determined by the formula: W = 1*Kv*V, Where:

• 1 - constant;
• Kv - standard maximum permissible concentration of the material (mg/m3 per hour);
• V is the volume of the box.

Ventilation is carried out according to the formula: U = d*V, where d is the air exchange rate, V is the volume of the box. The amount of air pumped out and forced into the chamber is always the same.

After determining the air exchange, an aerodynamic calculation of the ventilation system is performed, during which the required cross-section of the air ducts and the air flow rate are calculated, taking into account the resistance of the filter materials.

Filters for spray booths

The absence of dust and mechanical particles in the air supplied to the box is a factor that determines the suitability of the camera for use, since contaminants that fall on the car body during the painting process negate all the efforts of the painter.

Depending on the filtering method, boxes are classified into two groups:

1. Dry spray booths equipped with roll or panel filters for coarse and fine cleaning;
2. Painting booth with a water curtain - when supplied, the air flow passes through a water cascade or a tank with an irrigation system. Water filtration in them replaces the primary coarse filter.

Filters for spray booths are classified according to their functional purpose into:

• Coarse cleaning - mounted on the external air duct of the supply ventilation, cleans the flow from large mechanical particles;
• Fine cleaning - installed on the ceiling of the box or on the internal supply air duct, cleans the air from dust;
• Floor filter for spray booth - installed on exhaust fan, cleans the pumped air from toxic paint fumes.

Filters for painting booths - Consumables that become contaminated during operation, resulting in a reduction in their throughput and cleaning quality. When servicing the box, consumables are replaced, the frequency depends on the filter material:

• Cardboard camera filters are changed every 2 weeks;
• Fiberglass - once every 40 days;
• Ceiling standard EU5 - every 1000 hours;
• Floor-standing - every 150 hours.

Do-it-yourself supply and exhaust ventilation

The possibility of exhaust is selected separately, depending on the size of the spray booth

The hood in the paint booth is installed with your own hands upon completion of installation of the box box. The first stage of installation is the creation of a raised subfloor and the placement of an air intake duct in it, through which air is discharged outside the chamber.

The raised floor is constructed by pouring concrete into the formwork, which has grooves for laying air ducts, or is formed on an existing floor. With this approach, a grid floor 20-40 cm high is welded from reinforcing bars, an air intake is placed inside the grid and connected to an exhaust compressor.

The supply air duct box is placed on the ceiling of the chamber, a compressor is connected to it, connected to a heat generator or electric heating elements, due to which the flow entering the chamber is heated to the required temperature.

To prevent “blind spots” along the side contours of the chamber, 8 air ducts (2 for each wall) are routed from the supply duct along the perimeter of the box walls, providing horizontal air supply.

Hood safety

Painting booth - room, with high level fire danger. For its equipment, it is permissible to use only explosion-proof ventilation units.

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Safe operation of the box is achieved due to the following factors:

• The heat exchanger that heats the supply air is equipped with a protective thermostat;
• The thermal insulation of the chamber is made of fire-resistant materials - mineral or basalt wool;
• The box is equipped with an autonomous fire extinguishing system;
• Ventilation heating elements are grounded according to
• The air ducts are equipped with explosion-proof air supply shut-off valves and check valves;
• In places where fire-hazardous paint fumes accumulate (particles settle in the lower part of the box), additional air intakes are installed if necessary.

Dry spray booth Thanks to the design and calculated technical proportions and parameters, it maximally removes excess paint mist and polluted air from the spray area, cleaning it.

It is very important to choose equipment with correct placement fan and power, because if:

The fan is weak - the suction power is insufficient, solvent vapors remain in the air and the paint settles on the floor and walls;

The fan is too strong - paint is removed that has not yet reached the product.

The noise load and the amount of power consumed by the equipment are also IMPORTANT.

Operating principle of a dry filtration spray booth:

1. Remove paint particles and dust from the spray area.

2. Removing the paint aerosol and eliminating the possibility of its spreading into surrounding areas.

3. Providing necessary conditions to create high quality coatings.

4. The removed air is cleaned of mechanical paint particles (remaining in the filters) and released into the atmosphere.

How is air filtered in dry spray booths?

The polluted air flow created by a fan (installed on the roof or diagonally), with paint particles, moves by inertia into the chamber opening where one or two filters are installed.

Filters are:

1. in rolls

The most popular is inertial action. Particles of paint, hitting the inner wall of the filter several times, settle, and the air continues to move by inertia. High filter holding capacity allows you to work without sweating the air suction speed. So in a dry painting booth 2 meters long, the suction area is 3.6 sq.m of surface (2 pieces of 2 meter rolls), the volume of paint retained is about 15 kg/sq.m. That is, it is capable of holding 54 kg of paint waste.

– used as the only filter level. Basically, preference is given in car cameras (specifics of placement). Provides the necessary degree of cleaning, however, when filling, the air flow rate decreases.

Air, cleared of mechanical paint particles, is released through ventilation into the atmosphere.

How long do filters last in a dry spray booth?

The question directly depends on many factors.

1. How much paint, varnishes, primers, etc. sprayed per day?

2. What kind of spray guns are used? (Which spray system?)

3. What products are painted?

4. How are cabins cleaned and filters replaced?

If you have a 2 meter dry paint booth, and you spray 20 liters per day (excluding solvent!!!), using a Chinese spray gun (with a traditional spray system, material transfer coefficient 40-45%), then (20 liters x 40 % = 8 liters per fog!), then taking into account the holding capacity of the filter is 15 kg/sq.m. (cabin suction area 3.6 sq.m.) – 1 filter replacement will last for – 7 days.

And one roll for 1 month!

What length should I choose for a dry spray booth?

You need to decide on the maximum size of the products to be painted and select a similar size or with a small margin. That is, if the product is 2.7 m, the cabin is 3 meters, if it is 1.8, then 2 meters. It also depends on how many painters will work in one booth.

What depth should I choose for a dry spray booth?

The depth of the cabin depends on the allocated room for painting; if it is planned that the painter will be inside the cabin, then you need to start from the size of the product. If the room is allocated 4 meters, and the cabin will be installed 3 meters, it is generally advisable to use a cabin with minimal side walls. Walls are also needed if there are two different painting stations nearby, to avoid problems with cross-pollination.

Scheme of a dry spray booth.

In diagram L1 - the depth of the paint booth (working area)

Why do you need a dry spray booth? Can you work without it? We threw out the filters, we work like this!

Using open ventilation, without a cleaning system, violates all fire and sanitary safety requirements. The level of solvents and paint in the room is constantly accumulating. A stream of contaminated air, without first removing paint, is released into the atmosphere through ventilation and settles on the surface around your building. In addition, there is a process of constant paint sticking to the air duct and fan. Any spark can lead to irreversible consequences! It is impossible to determine how long you can work in such conditions, it could be a month or a year or two, and when the day comes that will not allow you to change anything!

What is the working height of the spray booth (cabin)?

The cabin height is the entire height including the fan and roof. The working height is the suction area. The height of a standard cardboard filter is 0.9 m. Typically, cabins have 2 rows of filters with a total height of 1.8 m. There are models of increased height, in which filters are installed in 3 rows - 2.7 m in height.

Remember that for any task you can choose the optimal solution!