Spray booth with water curtain W3000. Spray booth with water curtain Spray booth with water curtain

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Spray booths with water curtain and dry filtration

Waste collectors

Spray booths with water curtain

Design spray booths with water curtain Manufactured from high quality galvanized steel sheets. The chamber is equipped with a folding curtain, which facilitates its maintenance, cassettes with filters paint-stop (Paint-stop), immersed in water circulation pump made of stainless steel, intrinsically safe fan and explosion-proof luminaires IP 66 . The speed of air movement in the painting area is 0.4–0.5 m/s.

Equipment: CVA - with a short base and CVA/G - with an extended base, a water floor and a grate.

At your request, our specialists will prepare a project overpressure chambers ("clean" room) on the basis of those offered, as well as prepare you an offer for the supply painting complexes based on low pressure systemsHVLP applying paintwork ( compressors , paint sprayers , incl. HVLP , distillers and etc.).

We recommend that you take a look at some theses on the organization of the work of painting shops on the basis of spray booths with water curtain during the winter and autumn-spring periods.

We also bring to your attention device for water purification from paint and varnish waste in spray booths with water curtain(Collection of waste LKM).

In addition to the supply of Italian paint booths, we also produce our own, respectively, domestic production. The main advantages are low price and fast terms (only 15 days)! Attention! New! Refurbished to new condition painting lines used from Veneta Revisioni (Italy)!

Spray booths with dry filtration

The structure is made from sandwich panels . The walls of the sandwich panels are made of powder-coated galvanized sheets 30 mm thick, the space between which is filled with foamed polyurethane foam.

Filtration polluted air is carried out using a set of fiberglass (floor) and labyrinth (in chambers without carbon elements) filters type "paint stop" (Paint-stop) 50 mm thick, installed frontally. In order to reduce the concentration of dust in painting area and storage and drying areas we recommend using

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? Under 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 type of camera is similar to traditional devices. Air enters from the atmosphere into a 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 a thin wall of water that traps dense particles - they settle in 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 of air masses from dye particles (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 air cleaning system in water curtain spray booths 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.

The organization of the work of the spray booth involves the installation of cleaning systems, moreover, these systems take into account the main problem - the presence of paint residues in the exhaust air. Standard filtration methods are not effective, therefore, before entering the duct, the exhaust air passes through a water trap or curtain. In water, both fractions of the paint material and harmful impurities are best retained.

Features of water curtain chambers

The quality of applying paint in a garage with a brush and in a professional camera by spraying is very different. A high-quality coating can be achieved thanks to the unique microclimate, since the air in the working area is pre-cleaned and heated to the desired temperature. Dust ingress is critical for a freshly painted surface. Strict requirements for sterility and air humidity are observed in the room, but all this would be pointless if such cameras did not have effective ways to deal with paint fog - we are talking about paint fragments that have not fixed on the painted surface.

To create suitable working conditions, an air circulation system is organized in such chambers. At the entrance to the chamber there are filters that purify the air from large fractions, then the air is heated to a certain temperature and supplied to the working area. As soon as the painting process begins, some of the paint will lie on the surface and begin to set, and some will be in the air. Further, it all depends on whether the air will enter the filters in a natural or forced way.

Water, by its nature, cleans the air well from paint fractions, but special additives are added to the water to improve its properties. At the same time, it must also have dry filters operating in parallel. Water takes only fractions of the paint, but dry filters are no less important for the system, which purify the air before it enters the exhaust fan.

The principle of operation of the water curtain

A water curtain is commonly understood as a hydrofilter that cleans air flows from paint and harmful impurities. Separate cascade. injector and non-injector filters. The difference lies in the method of supplying the water flow for cleaning. When using a cascade filter, the curtain is produced by the shield; in nozzle filters, the curtain is created by nozzles. Vortex hydrofilters are used for active mixing of air with water.

Filters work like this:

Exhaust air, where there are already paint particles, vapors and other harmful impurities, is fed to the screen. This can be done by a fan or air will get there naturally.
Nanos is responsible for creating a continuous layer of water that is fed to the screen.
As soon as the air stream collides with water, large particles are separated from it and enter a specially equipped bath.
Then comes the second stage of purification, in which everything that remains after the first stage is removed from the air.
Chaotic air currents are intercepted by the drop catcher.

Requirements

There is only one requirement - the system must cope with waste streams, respectively, it all depends on the intensity with which the spray booth works. If the load is large, then for better mist trapping, you can put an active water tray, which is a bathtub closed with a grate. The presence of nozzle filters obliges you to choose between screw or tangential nozzles:

The presence of screw nozzles gives a more stable and stable water jet when colliding with air. But such systems are difficult to design.
It is easier to make tangential nozzles, which have a less stable flame, but they are less likely to clog.
The angle of the cone of the water jet should be in the range from 70 to 75 degrees, and the pitch of the nozzles will be determined from the angle.

The water flow is also regulated by the chamber owner. It depends on how quickly the water will pass over the screen or shields, as well as on the number of curtains. In such systems, the circulation of water is almost always closed, that is, for a certain time the same volume of water works in the system.

For high-quality separation of paint particles from water, with their subsequent removal, it is recommended to add impurities to the water. They turn paint residues into sludge that settles after a period of time. Antifoam agents should also be added, otherwise the water may start to foam.

Pros and cons

The advantages of such installations are that there is simply no more effective method for cleaning exhaust air from specific fractions. The process is thought out to the smallest detail, including the subsequent purification of water from sediment. Another question is that here you need to work out an effective scheme, taking into account the needs of the camera. Impurities will need to be added to the water itself so that the water itself does not foam, and the paint sets better with the liquid, but does not clog into lumps. Water filters do not work separately from the main ventilation system, so you need to calculate exactly how much air should be removed from the chamber per unit of time.

The use of cameras with a water cleaning function is justified in all situations when it comes to professional painting. Since in this case you will have to follow strict environmental protection and sanitary standards. Equipping a water curtain for a non-professional camera is problematic both because of the price and because of the complexity of installation and further maintenance.

Spray booth with water curtain mod. W3000 is designed for:

significant improvement in the quality of paint coatings;
a significant reduction in the maintenance time of painting areas;
increasing the productivity of painting sites;
ensuring acceptable sanitary and hygienic working conditions for painters and support staff;
immediate removal of solvent vapors from the working area in order to exclude the formation of explosive concentrations;
a significant reduction in emissions of sludge from paints and varnishes into the environment;
reduce the fire hazard of paint brushes.

Areas of use

Spray booth with water curtain W3000 is successfully used for painting metal, glass, wood, plastic and their products.

The range of painted products is very wide:

wheel rims painting
painting of overall metal structures
painting of garden and agricultural machinery
Boer painting
painting pipes and poles
painting piles
painting of welded air ducts
formwork painting
painting elements of building structures
painting of cement fiber boards and other building and finishing materials
painting (varnishing) of electronic boards and components
aircraft parts painting
painting elements of boats and boats
car bumper painting
restoration of furniture and antiques
furniture painting
painting MDF facades
table painting
painting chairs
window painting
door painting
painting moldings (door moldings, skirting boards)
painting parquet and floor boards
painting other furniture and joinery products

Principle of operation

Part of the paint material sprayed by the painter does not fall on the product. At the same time, fine dust is formed in the air from the quick-drying components of the varnish - dust, which, thanks to the spray booth, is removed from the working area by an air stream parallel to the floor.

A significant part of the varnish dust is deposited on the water curtain (up to 85%).

Additional filtration systems (optional) - a labyrinth of barrier panels that repeatedly change the direction of the air flow, as well as quick-release cassettes with an inexpensive replaceable element - a glass fiber filter, make it possible to achieve a degree of purification from solid particles up to 99%.

A "side effect" of using water in the filtration system is the absorption of solvents at the start of the chamber. After the water is saturated with solvent molecules, the absorption of "odors" stops, and the illusion of their filtration disappears.

Basic equipment

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

Provides durability of operation and reduction of vibration in the course of work.

Double cascade of 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 lower edge of the curtain and the 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 absence of long sections of free fall of water, the formation of splashes in both the upper and lower parts of the working area is excluded;
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.

Attached bath for placing the pump>
The location of the bath 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 the water curtains, as well as to quickly drain water from the chamber with a regular pump during its scheduled maintenance.

Stainless steel pump, pumping clumps of paintwork sludge with a diameter of up to 35 mm, as well as a built-in overheating protection system.
Circulating water conduit system, including a water circulation valve, an automatic water drain valve, all necessary hoses, passage assemblies, flanges, clamps and other installation 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

Explosion-proof exhaust fan.

Explosion-proof version, with explosion-proof motor (optionally with a general industrial motor or non-explosion-proof).

1a- The fan with the bearing case of flangeless execution. Due to the installation through a rubber gasket directly on the roof of the chamber and the placement of additional amplifiers in the fan installation area, the vibration resulting from clogging of the fan blades during intensive work of the spray booth is minimized.

The fan motor, together with the impeller, is completely removed from the housing. To do this, you do not need to chisel the air ducts, disconnect the electric motor from the electrical network, etc. This fan design minimizes maintenance time.

1b- Fan with supporting frame. The fan can be installed in any convenient place, incl. outdoors, and is connected to the chamber with an air duct (the air duct is excluded from delivery).

The design provides for the possibility of removing the motor together with the impeller from the fan housing without chiseling the air ducts. This ensures ease of maintenance and minimizes process downtime of the paint booth.

Additional devices for air filtration

The combined use of devices allows to achieve a degree of purification from solid particles up to 99%.

2a- A labyrinth of barrier panels that repeatedly change the direction of the air flow. At the same time, they are additional diagonal stiffening ribs. Recommended for installation when placing the fan on the roof of the chamber.

2b- Quick-release filter cassettes with an inexpensive replaceable element - a glass fiber filter.

Electric control panel

3a- Shield in a plastic case with automatic switches - for placement outside the hazardous area

3b- Shield in a metal case with on / off / emergency off buttons - for placement outside the explosive zone.

Two-lamp explosion-proof luminescent lamp, 2х36W. The luminaire is supplied with 2 lamps.

Increasing the depth of the working area by 500 mm

Set of two side panels and a roof panel.

water floor

The water floor bath is integral with the upholding bath of the spray booth and has a height of 300 mm from the shop floor level. Thus, installation of any similar is not required, which facilitates the movement of the operator. A large volume of water filling the bath allows you to increase the cleaning interval from the accumulated sludge of paints and varnishes, reducing the time of technological downtime. Galvanized gratings covering the water floor can withstand a load on the track of at least 200 kg, and 450 kg / m2.

The supply fan and a set of filters for the "economy project" include:
- Supply fan of general industrial design. To create excess pressure in the paint shop, the performance of the supply fan is selected 10-20% more than the exhaust fan, taking into account the fact that the resistance of both the pocket filter and the filter of the air dispensing device must additionally be overcome.
- Pocket filter in its own housing, designed for docking with the supply fan. Execution of the filter - quick-detachable. The filter is intended for repeated use. Its regeneration is carried out manually, by mechanical cleaning and blowing.
- Fine filter roll (20x2 meters) for self-tailoring by the buyer of the air distributing sleeve.

Spray booths with a water curtain are perhaps the most advanced version of the design of painting systems. Equipment of this type is used for painting large-sized products, including car bodies, or individual body parts, various furniture structures, etc.

Any spray booth is based on the fact that air moves inside the system, which carries along a mist of paint, which evenly settles on the surface to be painted. And if in a traditional spray booth there is a possibility that harmful substances or paint particles will go outside the booth, then in booths with a water curtain, paint particles are retained by water. Moreover, molecules of harmful volatile substances bind with water molecules, which are in excess inside the spray booth.

Thus, the ingress of harmful substances into the surrounding atmosphere is drastically reduced. But it cannot be said that the water curtain gives a full guarantee that the release of harmful substances into the atmosphere is completely excluded.

In addition, there are chambers that operate on a partially closed cycle of air movement. In this situation, it turns out that the air that has already been in the chamber enters it on the next cycle. And if it is not enough to clean it before reuse, paint particles that have already begun to polymerize will enter the chamber along with air. And this can significantly affect the final quality of the coating. And the water curtain, which can have a different design, retains paint residues.

How do spray booths with a water curtain work?

The spray booth with water protection is very similar in principle to traditional spray booths. Air is sucked in from the atmosphere into the closed space of the chamber. Air is sucked in by the fan. Air enters through a system of filters, each of which provides a certain level of purification. The smaller the holes in the filter material, the finer the cleaning.

The air during the painting phase is heated by passing through special heating elements. The temperature in the chamber starts to rise.

There are exit holes at the bottom of the spray booth. Moreover, they can be located in different places of the chamber (depending on the hole). Through these openings, the air, due to the operation of the exhaust fans, leaves the closed space of the chamber. And it is in front of the highway, which works to remove air from the chamber, that water curtains are installed, which can also have a different design. Essentially, air mixed with paint that exits the chamber passes through a thin wall of water. And all suspended particles remain in this water.

The water curtain can be considered as a water filter. Although there are options when the air does not pass through a wall of water, but through a special container with water. In this case, solid particles gradually accumulate at the bottom of the container, which then precipitate in a state of sediment to the bottom of the container.

In order to activate the process of binding harmful substances in the air with water, a special reagent is added to the container, which is a catalyst for a chemical cleaning reaction.

The most advanced water curtain spray booths support multiple levels of air purification. The first level is when the air passes through the frontal water curtain. The flow of water is a solid wall, and the speed of water movement is the same all the time. Water covers the entire surface of the front part of the curtain.

At the second level, there is a finer purification of air from paint particles. This is the so-called level of internal purification. According to experts, it is at this stage that the most complete air purification from paint impurities takes place.

The finest cleaning takes place on the final filters, which can be made on the basis of hydrocarbon technologies (carbon filters) or dry filters, which are made on a different basis. Here, literally all remaining paint particles are removed. Thus, the fan blades are protected from paint residues sticking to them.