The principle of operation of spray booths with a water curtain. Spray booth with water curtain and dry filtration Spray booth with water drawing

Painting cars at home is a great business solution. But in order to be able to paint cars, there is little experience and equipment for painting, you also need to have a room in which painting will be done. Vehicle. In organizations that deal with car painting, paint work has long been carried out in a chamber with a water curtain. It is no secret that such a device can be made with your own hands, only with some effort and spending a small amount of money to buy some equipment. You can buy a ready-made one, only its cost will be very high, and not everyone is ready to invest a large amount. In order to make a device with a water curtain with your own hands, you will also need some knowledge.

What is the camera made of?

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Spray booth with a water curtain - this is a closed room, which is made of of stainless steel and has supply and exhaust ventilation. Such ventilation is created with the help of electric motors. The main part of the device is a heating element, which helps to heat the room to the required temperature and maintain it during painting work. The chamber also includes lighting, which must be distributed evenly over the entire area, and have sufficient luminous flux. It is best to place them not only on the ceiling of the room, but also on the side walls. The device also includes equipment for painting work, and other auxiliary tools.

Painting booth layout

Knowing what the spray booth consists of, you need to decide on the location where the arrangement will be made, and make a project, according to the location of the main structural elements. An excellent location for the construction of the device can serve as a garage, or build a new extension, which will take more time and, accordingly, finances. To make a device with your own hands, you will need structural elements from which it will be based, heating and ventilation systems, filtration and lighting.

Making a painting chamber

Having made the layout, it is necessary to carry out all the technical calculations, and proceed with the installation work.
First of all, a new room is being built or a frame is being assembled inside the garage. The overall dimensions should be: length 10 meters, width 8 meters, height 3.5 meters. The spray booth, respectively, has a size: 4 meters wide and 6 long.

Gate installation.
It is best to use the gates insulated so that there is no suction and loss of warm air, the outside is sheathed with corrugated board. In the place of contact of the gate, it is insulated with a special adhesive tape. Places with cracks must be filled with mounting foam.
Floor construction. The base of the floor is made of concrete, inside which a hole is made, and a metal pipe with a diameter of 150 mm is brought out into the street to drain air. A metal grate is laid on the floor over the entire surface of the room to a height of 15-20 cm.
Walls. The walls are sheathed with corrugated board, and inside they are insulated, you can make a sandwich panel.
Air exchange system. Elements: two electric motors and metal pipes with diameters of 100 mm and 150 mm, respectively. For supply ventilation an electric motor with a power of 5 kW is used, for exhaust at least 7 kW.
Ceiling. It is made of a professional flooring, with a heater. Mounted in the ceiling metal carcass for air flow. An electric heater that will supply warm air indoors, installed outdoors.

Air cleaning. It is carried out using filters and has a three-level purification.
- 1 Level. A frontal water curtain is created, which is carried out by draining uniform water flows;
- 2 Level. Cleaning the air inside the device. Promotes air filtration and purification from paint waste;
- 3 Level. dry filtration. It contributes to the complete purification of air from paint particles and performs the function of protecting the fan from paint sticking.
Lighting. Mounted LED or fluorescent lamps on the ceiling and walls of the room.
Automatic sensors for control and monitoring of the system are also installed. supply and exhaust fans and filters.
Having mounted everything necessary for the water chamber, the equipment for painting is installed.

How the work is done

The electric heater pumps air from the atmosphere into the closed space of the room. Passing through the system, the air is cleaned by filters, each of which provides a certain purification.
The temperature in the room rises due to the work of the heaters. The painting process begins. Down on the floor, air begins to be sucked out of the chamber, with the help of an exhaust fan. Water curtains are installed in front of the highway, which help to retain paint particles. Here, the air passes through all three levels of purification, if such are pre-installed. By the same principle, cameras with a water curtain and factory production work.

Do-it-yourself positive aspects of the device

Free planning system.
Big savings.
The ability to save on all components.
The ability to use the main parts of the structure.

Device disadvantages

There may be inaccuracies in the calculations, or imperfections in the installation of the device.
It is not possible to automate the entire process, since the elements of the device consist of separate parts.
There are no guarantees for the performance of such a device.

Price

The cost of building a do-it-yourself water curtain chamber can take a long time, but it will cost about $4,000. You can buy a factory one from $20,000 and up. To start a business, the best option there is a do-it-yourself construction, which is much more profitable for a start-up business.

In organizations that paint cars, water curtain booths are often used. They are one of the most advanced options that allow you to create a coating for products of large dimensions, such as car bodies, parts, furniture, etc. Their design as a whole is a stainless steel room with ventilation of the supply and exhaust type, which operates on electric motors. The main working part is a heating element that heats the box to the required temperature and maintains the heat level during work. Lighting also plays an important role, because it should create an even, intense light space without shadows.

Painting booths

What is the difference between paint booths with a water curtain, as well as their advantage over traditional devices? In specially created conditions a fog of paint is formed, which then settles on the surface. But if in the usual cases there is a danger that toxic substances or vapors will still leave the room, then in such devices they are retained with the help of water. In addition, the liquid binds volatile ethereal substances that are present in such a chamber. Of course, this type of filtration is not yet a guarantee of the final disposal of harmful emissions, but still a significant reduction in their number.

Street spray booths

There are also spray booths operating in a closed air flow cycle; in this case, the air moves in a circle and is returned for reuse. And if it is not very well cleaned before starting a new process, then small droplets of dye will enter the room, which will polymerize. This can degrade the properties of the enamel, however, the curtain of water traps these residues.

Spray booths with a water curtain: stages of work

As already mentioned, this species cameras is similar to traditional devices. Air moves from the atmosphere to limited space, while the suction is based on the operation of the fan. The air flow passes through many filters, and each of them performs a specific purification process. The quality of processing depends on the size of the holes in the filter material.

When the dyeing process begins, the air is heated by special heat elements. The temperature in the chamber rises. There are exit holes at the bottom of the device. They may be in different places. Through them, the air flow leaves the workspace, which is done with the help of fans. The water curtain is placed directly in front of the line, which removes the exhaust atmosphere from the chamber. Thus, before leaving the box, the air crosses thin wall from water, retaining dense particles - they settle in the form of a suspension.

Actually, this design is a water filter. There are other possibilities when the air for cleaning is passed not through a wall of jets, but through a special container into which water is poured. At the same time, dense particles accumulate at the bottom, which then form condensate. In order for all harmful substances to precipitate faster, a reagent is added to such a container, which speeds up the processing processes.

The most advanced spray booths of this type have several levels of cleaning. The first of them is the passage of air through a continuous water curtain. This creates a wall of water, and its speed is always uniform. The second level provides better cleaning air masses from particles of dyes (internal cleaning). Here there is a complete liberation from impurities. The third level is the completion of the cleaning processes, which can be achieved through carbon based filters or other types of dry based filtration. At this stage, all paint particles disappear. Therefore, the fan will be protected from dye residues.

These are the main stages of operation of such cameras. This system air purification in spray booths with a water curtain helps to reduce toxicity to a minimum, and therefore the use of this type of equipment is considered mandatory in those industries where the use of liquid paints and varnishes is required.

Basic equipment:

Prefabricated body and standing bath made of galvanized steel with a large number of longitudinal, transverse and vertical stiffeners.

Double cascade water curtains

Frontal curtains of both cascades (those through which water flows) have a quick-detachable design. This not only provides full access to the interior of the chamber for maintenance, but also makes it technically possible to narrow the gap between the bottom edge

curtains and water in the bathroom below. For the upper cascade, this is the lower cascade bath, and for the lower cascade, this is the settling bath.

This design has a number of advantages, the main ones being:

due to the lack of long sections free fall water, splashing is excluded in both the upper and lower parts working area;
water falling from the lower edge of the water curtain creates a dense stream, additionally purifying the air from suspensions, which eliminates the need to install water sprinklers;
the air flow rate after getting inside the spray booth is reduced by 4-5 times, which allows suspensions to settle into the settling bath, increasing the degree of purification of the exhaust air.
The location of the bath for placing the pump is universal (to the left or to the right of the chamber). In this way, the service side can be selected during installation.
The location of the service area outside the chamber allows visual control of operation and avoiding external contamination of the pump, which leads to its overheating and premature failure.
Gate valves located outside make it easy to regulate the flow of water in water curtains, as well as to produce with a regular pump quick drain water from the chamber during its scheduled maintenance.
stainless steel pump,pumps clumps of sludge paintwork materials with a diameter of up to 35 mm, as well as a built-in overheating protection system.
Circulation conduit system, including a water circulation valve, an automatic water drain valve, all necessary hoses, passage assemblies, flanges, clamps and others mounting materials
Mounting kit including bolts, nuts, washers, sealant, etc. according to the camera package
Packing for transportation by road
Passport and instruction manual
CD with diagram and photo illustrations of the assembly

Additional options:

Exhaust fan
Barrier panel labyrinth
Control panel for placement outside the hazardous area
Control board in plastic case
Explosion-proof luminaires with lamps (2х36 W)
Working area depth increase by 0.5 meters (roof panel and 2 side panels)

water floor
Supply fan and set of filters for "economy project"
Placement of the pump inside the chamber (to reduce the overall width of the chamber)
Front curtains of both cascades made of stainless steel instead of galvanized steel