Design of fire extinguishing installations for the drying chamber of a processing plant. Drawing up a plan for a paint booth. Is fire extinguishing necessary in a paint booth?

Object address: Russia, Vladimir region, Vladimir, pos. Sukhodol

Type of object: Industrial facility (plants, factories, enterprises)

To protect these premises, it is planned to use a system based on the Bolid S2000M remote control, which includes:
- S2000-M – Control panel for APS, SOUE, APT;
- S2000-KDL – Two-wire line controller for monitoring the status and collecting information from loops fire alarm;
- S2000-SP1 – Signal and triggering unit for generating an alert signal;
- S2000-BKI – Display unit for displaying the current state of the system;
- S2000-ASPT – PPKUAS fire extinguishing system and sirens for centralized fire protection in one powder fire extinguishing zone.
installed in the office space.
3.1.3. Fire smoke detectors are used to detect fire in technical rooms. addressable analogue detectors DIP-34A, and as manual fire call points - IPR 513-3AM. The use of these types of detectors allows high accuracy localize the location of the fire.
3.1.4. To detect a fire in the fire extinguishing room, an automatic fire alarm is provided. In the protected premises, smoke fire detectors IP 212-141 and thermal fire detectors IP 103-5 are used, and IPR-55 is used as manual fire call points. These types of detectors are widely used in practice, have passed state certification and have proven their reliability and ease of maintenance in practice in premises for various purposes.
3.2.1. In the warning and evacuation control system, PKI-1 “Ivolga” are used as sound sirens. SOUE sound alarms must provide general level sound, the sound level of constant noise together with all signals produced by the sirens is not less than 75 dBA at a distance of 3 m from the siren, but not more than 120 dBA at any point in the protected premises.

The following products were used to implement the project

Fire extinguishing automation
	Network Controller

According to requirements pp.7.29-7.31 DBN V.2.5-56:2010 painting and drying booths must be equipped with systems automatic fire extinguishing.

Drying and painting booths have a number of features that should be taken into account when constructing fire extinguishing systems:

As a rule, these premises are fire and explosion hazardous and require the use of certified explosion-proof equipment, design and installation taking into account the requirements of the PUE;
The operating temperature in drying and painting chambers during operation can exceed 50˚ C, which does not allow the use of standard equipment with an operating temperature of up to +50˚ C (fire detectors and fire extinguishing modules) inside the protected premises;
Possibility of contamination of detectors during painting, which also does not allow the use of standard detectors;

Depending on the dimensions, characteristics of the equipment used, technological process and other features of painting and drying booths, the BRAND group of companies can offer several options for automatic fire extinguishing systems. Reliability and efficiency automatic system fire extinguishing of painting and drying booths mainly depends on the type of detectors and fire extinguishing agent.

When choosing the type of detectors, it is necessary to determine the primary signs of fire for the characteristic materials of painting and drying chambers - paint and varnish products and solvents, while false alarms should be eliminated as much as possible, taking into account technological process. Most characteristic features fires according to the degree of occurrence - smoke, flame, temperature. The use of smoke detectors is excluded due to the likelihood of false alarms when painted. The use of standard point smoke and heat detectors and flame detectors is also not always possible due to the operating temperature exceeding the operating temperature of the detectors (during the drying process).

The BRAND group of companies offers solutions using a thermal linear detector of the TC series produced by Safe Fire Detection Inc. (USA).

Thermal linear fire detector series TC (thermal cable) allows you to determine the excess of the response temperature along its entire length and is produced with different response temperatures - 68˚, 78˚, 88˚ or 105˚С. The detector response temperature is determined depending on the maximum operating temperature of the protected room according to the Operation Manual. The thermal cable is produced with three types of braid - PVC (standard, for industrial use), nylon (for protection from mechanical damage and UV), polypropylene (for chemically active environments). The thermal cable can be used in fire and explosion hazardous areas when connected to the control panel through an spark protection unit.

As fire extinguishing agents, the BRAND group of companies offers solutions using fire extinguishing powders or gas extinguishing agents (carbon dioxide or synthesized gases).

For gas fire extinguishing, fire extinguishing modules are installed outside the protected chamber; the fire extinguishing agent is supplied to the protected volume through a distribution pipeline through nozzles. Gas fire extinguishing allows fires to be eliminated without harm to equipment and does not require the removal of fire extinguishing agents (removal is possible through natural ventilation, stationary or mobile smoke removal systems) from the equipment, but is more expensive.

The proposed synthesized gases are safe for people at fire extinguishing concentrations and require less space for the placement of fire extinguishing installations in comparison with carbon dioxide systems, they can be used to protect objects with constant occupancy of people.

Fire extinguishing installations using carbon dioxide (carbon dioxide fire extinguishing), due to the low cost of the gas extinguishing agent, can be used to protect chambers with a high probability of fire (with frequent fires). When choosing the type of fire extinguishing agent, it should be taken into account that the fire extinguishing concentration of carbon dioxide is lethal to humans and when constructing carbon dioxide extinguishing systems, it is necessary to provide for the possibility of people leaving the room before the fire extinguishing agent is supplied, equip the room with start-up cancellation devices and conduct training with personnel.

For powder fire extinguishing, modules can be placed indoors (at an operating temperature in the room up to 50 ˚C, conventional or explosion-proof) or outside the protected volume with the supply of fire extinguishing powder through a distribution pipeline. The use of powder fire extinguishing is more economical, but requires removal of the extinguishing powder after activation. When calculating the mass of powder and/or the number of fire extinguishing modules, it should be taken into account that due to possible paint deposits along the entire height of the protected chamber, extinguishing should be carried out by volume.

If it is possible and appropriate to place modules inside the protected volume, Brand-15 MPP modules are offered. Modules "Brand-15" are reusable modules of the downloaded type, have an autonomous operation function (when the temperature reaches 68˚C; no more than one module can be used per room with an autonomous start-up), and are produced in standard and explosion-proof versions.

When placing modules outside the protected area, Brand-100 powder fire extinguishing modules are offered. The modules protect an area of up to 64 m2 and a volume of up to 280 m3, which allows you to protect large paint booths and optimally use their usable space. The design of the manual activator provides for the possibility of launching Brand-100 modules from a cable launch system (autonomous system).

Many years of experience in the production and implementation of automatic powder and gas fire extinguishing allows us to offer effective and economical solutions protection of painting and drying booths on a turnkey basis (supply of equipment, design, installation and commissioning works).

Automotive painting facilities are advanced processing facilities designed for vehicle repair and refurbishment. In such a box, most operating modes are automated, which greatly facilitates the operator’s work.

One of the main advantages of such a room is maximum ease of operation. When creating paint booths, only modern filter materials are used, thanks to which the air in the room is cleared of vapors paint and varnish materials as efficiently as possible.

Such cameras are an indispensable element for most modern car services, but the choice of such equipment must be approached very carefully. In our article we will look at the features of designing a paint service.

Where to start construction?

Having decided to build a paint booth for body work, you need to immediately think about the expected amount of profit and drawing up a construction project. You also need to consider the camera's performance and the expected number of employees.

Usually for full-fledged work A car painting shop requires at least 1 painter, as well as several disassemblers and straighteners. Recruited personnel need to be trained the latest technologies painting work, and in the workshop try to organize a mini-laboratory for the selection of paints.

As you can see, there is a lot of work, and in order to get completely confused, you need to draw up detailed project spray booth.

Main Components

The main elements of the spray booth include:

Premises (building);
Filter system;
Forced ventilation;
Exhaust ventilation;
Heat generator.

The main element of any spray booth is the housing and ventilation system. The fan helps clean the air in the room from persistent odors paint and varnish materials. Two ventilation systems can be installed in one chamber.

One of them will pump clean air into the body service room (supply), and the second at this moment removes paint particles (exhaust). The chamber can be equipped with only one fan, and in this case, when pumping clean air created indoors increased level pressure.

Due to the fact that air is supplied from top to bottom, paint particles are converted into fog, settle and are discharged outside through a special hole.

The principle of operation of the painting booth is as follows: the air coming from the street is heated by the system to the required level (usually for painting cars it is necessary to maintain the temperature in the room at 20 degrees).

After heating, the air passes through a filter system and enters the paint booth. Next, having absorbed all the harmful paint vapors, the air passes exhaust system filters and ventilation, after which it is discharged outside.

If the spray booth is equipped with high-quality filters, the air is discharged outside the booth as purified as possible. Almost all operating modes in modern painting booths are automated.

Another important structural element of the spray booth is lighting. Poor light does not allow craftsmen to see various flaws and defects on the surface of the body and effectively eliminate them.

Lighting in the spray booth is usually fluorescent or regular halogen daylight bulbs. Sometimes the owners of such premises increase their spending by equipping the spray booth with LED lighting.

In general, experts recommend installing mortise lamps with a glass diffuser in body service cameras. It is better to avoid lamps covered with plastic. The plastic often gets scratched, resulting in poor light quality.

Paint box - design features

The layout of the spray booth always depends on design features the buildings. Several types of paint boxes are now known:

Equipped with one motor;
Cameras with two motors;
Dead-end premises;
Premises where metal structures are supplied manually;
Boxes in which metal structures are supplied by mechanical methods;
Passage rooms;
Boxes with top tracks.

The main feature of dead-end spray booths is the ability to rotate the vehicle for convenient and uniform painting on all sides. Pass-through boxes allow metal structures to be moved along a special belt during the painting process.

In single-engine boxes ventilation system is represented by just one unit that supplies air into the room from top to bottom, thereby creating high level pressure. Under its influence, the paint mist is lowered down and removed from the room through the lower ventilation hole.

Unfortunately, single-engine paint booths result in heavy pollution environment, so they are now used very rarely. More the best option ventilation for the painting unit will be a two-engine unit.

It is based on two motors, each of which performs only one function. One motor is responsible for pumping clean air, and the second is responsible for removing dirty air containing paint vapors.

A properly designed paint booth will allow you to get a high-quality painted car, while costing a small amount of paints and maintaining the cleanliness of the workplace and the health of the painters.

Filter area on the ceiling;
Fan performance and power;
Correct placement of lighting devices;
Air speed inside the filter equipment;
The area of the filter located on the floor.

Rules for calculating ceiling and floor filters

The air filter is an important structural element of any car service center that paints cars. They are placed evenly in the room where the car body is painted. Such filters come in two varieties, for floor and ceiling.

The ceiling filter for the spray booth is installed so that it can be easily removed if necessary. For uninterrupted operation spray booth cleaning system, it is necessary to initially correctly calculate the minimum area of the filter elements.

Each of these types of filters should ensure maximum cleaning efficiency of the box (indicators should exceed 99%). In this regard, cleansing is performed in stages:

First, large particles of paint are removed from the air;
In subsequent stages, small particles are removed from the air.

This technique requires the use of fine filters, thanks to which dust from the street air does not settle on the surface of painted metal structures. To calculate the minimum area of ceiling filters, you need to know exactly the level of nominal air flow in the spray booth.

This parameter will need to be divided by the nominal air flow rate in the filter being used. The result of such calculations will be the minimum surface area of the filters. Naturally, to achieve maximum efficiency For the entire system, it is necessary to install large-area filters in the box.

In a similar way, you can calculate the minimum area for filters on the floor. In general, a floor filter for a spray booth consists of two structural elements: load-bearing sheathing and filter elements.

The painting booth drawing is created in several versions. Each of them has its own type of lathing with filters. The grille can be located directly under the car, or under the wheels of the vehicle.

In addition, the lathing can completely cover the floor of the chamber, and the filter elements in this case will be several centimeters below the level of the lathing.

Creating box lighting

It is best to equip a car painting booth with ceiling and wall lights evenly distributed throughout the room. It is also recommended to install several additional lighting fixtures on the back wall of the box.

For high-quality car painting, it is important that lighting devices do not contribute to the appearance of a flickering effect. For spray booths, the most convenient are long lamps mounted in a checkerboard pattern vertically. You can also equip the room with fluorescent lighting fixtures.

Fire safety

A paint booth for metal structures has one significant drawback - it has a high fire hazard. When arranging such a room, you need to pay great attention to safety requirements. When constructing paint booths, not only construction standards must be observed, but also the rules for arranging electrical networks.

All elements of the room and ventilation equipment must be equipped reliable protection against explosions. When equipping walls thermal insulation materials It is necessary to pay attention to the high resistance of materials to fire.

The best insulation for such rooms would be mineral wool. Fire extinguishing of a paint booth is an element that must be equipped in a car service bay. The implementation of a fire extinguishing system must be noted in the project plan.

For increase fire safety box, it is necessary to equip the heat exchanger with a special thermostat that performs protective functions.

You also need to equip the control panel with a special button that allows you to block the work of the feeder in the event of emergency situations. air valve(resulting in compressed air stop). The room must have a grounding system for electrical appliances.

The spray booth is a functional automatic mechanism that ensures safety and high speed work, and also high quality coloring of products. The operating principle of the chamber is that compressed purified and heated to desired temperature air from the street.

The atmosphere created in boxing allows you to high-quality painting car, and after completing the procedure, remove all dangerous connections through a special ventilation hole.

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