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Water mist fire extinguishing modules. Finely sprayed water modules mptv Practice of extinguishing high rooms with tv modules

Modern fire extinguishing systems in large premises are complex system pipes and tanks that provide quick and reliable fire prevention. One of the most common fire extinguishing modules is the Garant TRV, which is very popular due to its high efficiency.

TRV fire extinguishing systems are units whose operating principle is based on fire extinguishing using water, the particle size of which is in the micron range. Water is supplied to special nozzles under high pressure, the nozzles spray it with a droplet size of no more than 200 microns, resulting in a colloidal mixture resembling fog. Due to the high flow rate, such a mixture fills the room very quickly, and moisture covers almost the entire surface area of ​​​​various elements located in the room. Due to this it is achieved high speed fire extinguishing with a very low volume of water consumed.

The installation itself is a tank from which several nozzles protrude; the volume of the tank may vary depending on the model. The TRV module can be seen in Figure 1.

Fire extinguishing procedure

TRV modules water mist are highly efficient, the operating procedure includes the following steps:

• Various sensors detect fire and smoke, after which a signal is sent to start the nozzles to spray water;
• Immediately after receiving the signal, the gas generator of the fire extinguishing system is activated, releasing a large amount of inert gas into the module tank, the pressure in the tank increases by several atmospheres;
• When the maximum pressure is reached in the tank, the duration of the process is equal to fractions of seconds, the safety membrane of the fire extinguishing module is destroyed and water under very high pressure begins to flow through the nozzle.

Most fire extinguishing systems are under constant overpressure, such as a fire extinguisher. However, during long-term storage there is a risk of depressurization, which entails the ineffectiveness of this fire extinguishing method. Here, in the standard state of the module, that is, before activation during a fire, there is no pressure in the tank, which makes this unit safe and extremely efficient, since the risk of depressurization is not taken into account here. After the module is triggered, a recharge occurs, which consists of replacing the safety membranes and filling the tanks with water.

Advantages of using TRV modules

Modular expansion valve fire extinguishing has a large number of advantages, which include:

• Due to the creation of aerosols, the surface area of ​​water particles is very large, and water has a large heat capacity, due to which the particles take up all thermal energy and the ambient temperature drops sharply. As the temperature decreases, the chemical reaction of combustion in an oxygen atmosphere begins to slow down;
• When extinguishing a fire, a large amount of water vapor is formed, which fills the entire volume of the room, seeps into every pore and crack;
• Due to the micron size of water particles, it is sorbed on the surface of various objects, creating a thin film of water that prevents the further spread of fire;
• These units have higher performance qualities due to the fact that in passive mode they do not maintain any constant excess pressure;
• Low cost of fire extinguishing compared to traditional methods due to low water consumption and low cost of the devices themselves.

When choosing methods of provision fire safety You should pay attention to these modules, as they can help save a decent amount of money.

Fire extinguishing module TRV Hurricane

One of the most common fire extinguishing modules with finely sprayed water is the MUPTV TRV Hurricane. Hurricane modules are designed to extinguish primarily class A and partially class B fires; they are not suitable for extinguishing alkalis, alkali metals, some substances that can burn without the presence of oxygen, and so on. This unit currently has 4 varieties, which differ in size, tank volume and other parameters. The main features of this module include:

• There are models with two nozzles, as shown in Figure 2, and with four nozzles;
• The minimum duration of supply of finely sprayed water in these models is at least 3 seconds at a water flow rate of 1 to 6.5 kg/s;
• The module volume varies from 14 to 17 liters depending on the selected model;
• The trigger current of the gas generator on all models is approximately 0.12 A at a voltage of 2 V;
• The working pressure in the housing is 1.2 MPa, which is approximately equal to 12 atm, and the maximum pressure at which the safety membrane ruptures is 1.6 MPa or 16 atm, enormous pressures;
• The service life is at least 10 years when activated at least 5 times during the specified period;
• The fire protection area of ​​class A also varies from 19 to 35 square meters.

The areas of application of these models are huge; currently, hurricane fire extinguishing modules are mainly used in the following places:

• The shops;
• Libraries;
• Parking;
• Cinemas;
• Banks and other institutions.

The list of places where this fire extinguishing method can be used is huge.

Water mist fire extinguishing installation Garant 30

The Garant 30 water mist fire extinguishing installation is designed for extinguishing class A fires. This model is suitable for installation in warehouses, in office premises, V shopping centers and so on. The main features of the Garant 30 module include:

• The tank volume is 35 liters;
• The installation height can vary from 2.5 to 4 meters, depending on the height of the ceilings of the room. There are two types of spray nozzles, which are selected depending on the height of placement;
• The fire extinguishing area is 40 square meters;
• The gas generator trigger current is 0.2 A;
• The operating temperature of the unit is from 5 to 60 degrees Celsius.

Thus, the Garant 30 fire extinguishing module is more applicable for large areas due to its impressive size compared to Hurricane 13.

Fire extinguishing using TRV modules is very effective method fire fighting, characterized by high extinguishing efficiency at fairly low material costs.

Recently, at new construction sites and sites undergoing reconstruction, the use of the most modern system fire extinguishing with finely sprayed water.

TRV ( water mist) is an almost ideal system. With high fire extinguishing efficiency, the consequences of using expansion valves are minimal. Besides, modular systems The expansion valves are self-contained and do not require any power supply or additional water tanks. Not the least factor is that TRV is essentially harmless to humans. All this suggests a wide field for using these settings.

EI FOG "Water Mist" systems are a completely new fire extinguishing concept, where as fire extinguishing agent water is used, supplied under high pressure to produce droplets no larger than 100 microns. This system provides the following benefits:

• reducing the cost of purchasing tanks and water storage tanks;
• there is no need to section the protected volumes, just like when using volumetric extinguishing installations;
• minimizing the damage caused by the fire extinguishing agent, for example, the damage caused by water when the sprinkler or deluge installations of conventional spray are activated, with a droplet diameter of 0.4 - 2 mm.

System EI FOG "Water Mist" promotes the creation of fine mist, which quickly fills the protected volume of the room, while reducing the oxygen concentration. The effectiveness of fire extinguishing is significantly increased, while using a minimum amount of water.

Thanks to such a significant reduction in the amount of water consumed, compared to conventional sprinkler systems, the damage caused during fire fighting is minimized.

Water mist has a high heat capacity and a significant total active surface area of ​​the droplets, which makes it possible to sharply reduce the temperature in the fire zone and stop the chemical combustion reaction.

All these factors make it possible to safely evacuate people who were in the room, as well as create conditions for normal operation special personnel equipped with portable fire extinguishing equipment.

Due to the fact that fire extinguishing systems EI FOG "Water Mist" do not contain chemical additives, the installation can be considered absolutely environmentally friendly.

All of these advantages contribute to ensuring that fire control and extinguishing processes are carried out in the best possible way.

Using the EI FOG System

Automatic fire extinguishing installations with finely sprayed water ei fog water mist are used to extinguish fires of classes A (solid combustible materials), B (flammable liquids), C (flammable gases) and E (electrical installations under voltage up to 1000 V) in buildings, structures and premises for various purposes with categories by fire danger A, B, B1 and B3. The system can be used to extinguish live cables up to 30,000 V.

This fire extinguishing system, which uses water mist, corresponds international standards IMO A 800, A 913 and NFPA 75. Currently, the system is certified by the Federal State Institution VNIIPO EMERCOM of Russia.

Compare the advantages of a fire extinguishing system based on expansion valves over traditional water fire extinguishing systems:

Fire extinguishing module with finely sprayed water. Used to fight fires (fires) categories: A ( hard materials), B (flammable liquids) and E (electrical installations under voltage up to 1000V). OTV weight - 14.5 l

Fire extinguishing systems based on the principle of water spray are designed to suppress fires of category "A" (solids) and category "B" (flammable liquids). Due to their environmental friendliness, water fire extinguishing systems are safe for human health and environment. For this reason this type fire extinguishers (modules, systems) have proven themselves in domestic, heated conditions. This is due to the fact that at negative ambient temperatures, the fire extinguishing agent (water) contained in cylinders or special tanks of fire extinguishing systems freezes. Knowing this drawback of water fire extinguishing systems, some manufacturers add special additives, which make the fire extinguishing composition frost-resistant, allowing the fire extinguishing system to be used even at subzero ambient temperatures.

Technical characteristics of MPTV "TRV-Garant"-14.5-01 (85):

Fine mist water systems are used:

In case of fire of solid substances (class A)
In case of fire of fuel and lubricating liquids, fuel (class B)
In the event of a fire, live installations (class E)

Water mist systems are NOT APPLICABLE:

In case of fire of alkali metals
When igniting materials that do not require air to burn
When gases ignite

Equipment:

Module housing with mounting platform
- Spray nozzle (set of 3 types when ordering)
- Surfactant capacity
- Package
- Passport and instruction manual

Please note that before you start using this model of the fire extinguishing module with fine spray water MPTV “TRV-Garant”-14.5-01 (85), you should check its characteristics for compliance. Our company is not responsible for the use of modular fire extinguishing systems with finely sprayed water for purposes other than their intended purpose.

Buy and order delivery of a modular mist water fire extinguishing installation (MFW) in the regions of the Russian Federation (shipment transport companies) and zones of the Customs Union.

Fire extinguishing module with finely sprayed water MPTV "TRV-Garant"-14.5-01 (85), as well as other MPTV models (or their analogues) you can order and buy through our online store of water mist fire extinguishing modules, or simply order delivery in Moscow from the ABars company.

Free delivery is possible only for orders over 60 thousand rubles. Delivery of fire extinguishing modules with finely sprayed water in Moscow - 500 rubles, Moscow region - 1200 rubles. Or you can personally pick up the goods you ordered (Belorusskaya metro station).

If you have any questions about water mist fire extinguishing modules, we will promptly answer them by phone.

Fire extinguishing with water mist (MAW) is a modern, rapidly gaining popularity, highly effective fire extinguishing technology. Water is used as a fire extinguishing agent, supplied under high pressure through special spray nozzles, which creates a fine mist of droplets no larger than 100-150 microns in size, which quickly fills the protected room. At the same time, high efficiency of extinguishing fires is achieved with a minimum volume of consumed water, which allows the use of expansion valve technology in modular fire extinguishing systems.

The effectiveness of fire extinguishing modules with finely sprayed water is achieved due to the combined effect of the following factors:

• Firstly, fine water mist has a high heat capacity and a large total surface area of ​​the droplets, which leads to rapid decline temperature at the source of the fire and stopping the process chemical reaction combustion (effect of temperature reduction).
• Secondly, when water evaporates in the fire zone, a large amount of water vapor is formed, which, being a gaseous substance, has the properties of volumetric fire extinguishing agents and penetrates into any cracks and porous surfaces, preventing the gas exchange of combustible materials with oxygen by reducing its concentration in the combustion zone (oxygen displacement effect).
• Thirdly, fine drops of water and water vapor, deposited on the surface of materials not yet involved in the combustion process, create a thin film of water on their surface, preventing the spread of fire to the areas of the protected premises adjacent to the source of fire (fire localization effect). In the fire extinguishing modules with finely sprayed water produced by MPPA "Epotos", a foaming additive (potassium acetate) is used to enhance this effect. The potassium acetate solution also prevents water from freezing and allows the use of expansion valve modules when low temperatures(up to minus 40 degrees Celsius)

To summarize all of the above:
Fire extinguishing technology with finely sprayed water, in addition to cooling, implements two more extinguishing mechanisms - isolating the source and reducing the oxygen concentration.

There is another undeniable advantage of TRV fire extinguishing modules over other means fire protection, – absolute environmental friendliness and safety for humans. This allows the use of this technology in residential premises, shopping pavilions, industrial workshops and other rooms with people present. The rapid spraying of water mist and its instant cooling effect allows the evacuation of people in the room even during the active phase of the fire (when the fire extinguishing system is activated).
In addition, finely sprayed water has a unique ability to precipitate smoke. Application practice shows that immediately after the fire extinguishing modules of the expansion valve are activated, there is no need to turn on ventilation system to remove smoke.

Operating principle of fire extinguishing modules using finely sprayed water.

The operating principle of TRV modules is as follows:
1. Sensors automatic system fire extinguishing systems detect a fire, after which the system issues an electrical signal to start the fire extinguishing modules.
2. The gas generator of the fire extinguishing module is triggered by the received electrical impulse, which emits inert gas into the internal cavity of the module, which leads to rapid growth pressure inside the module housing.
3. When critical pressure in the housing is reached (the process occurs in a fraction of a second), the safety membrane of the expansion valve module is destroyed and water is released through a fine spray into the protected room.

It should be noted that in the passive state (before actuation), the pressure inside the module body is completely absent, which significantly reduces the possibility of loss of its functionality as a result of slight depressurization and gradual release of pressure. This sets modules apart from gas generator principle work from other systems that are constantly under pressure.

Scope of application of TRV technology. Restrictions.

Along with the requirements regulatory documents in fire safety, it is necessary to take into account the features of various objects of protection and calculate economic efficiency selected fire extinguishing technology, know all its features and disadvantages.

In residential and production premises modular expansion valve systems are unrivaled due to environmental safety and harmlessness to humans

IN warehouses intended for storing cellulose-based materials (paper, wood products), food, pharmaceutical products, complex and expensive electronic equipment, finely sprayed water is also the most acceptable solution. As you can see, the scope of application is very wide, but there are also limitations.

TRV modules are not intended for fire extinguishing in rooms with electrical equipment under very high voltage (over 1000 V).
In addition, finely sprayed water is not applicable for extinguishing class D fires, as well as some substances that are chemically active in relation to water, including:
- aluminum organic compounds, alkali and alkaline earth metals (extremely explosive when in contact with water and even in the presence of water vapor);
- organic lithium compounds, lead azide, hydrides of zinc, magnesium, aluminum (actively decompose in the presence of water, releasing flammable gases);
- thermite, titanium chloride, sulfuric acid, (actively interact with water with high heat release);

It is important!
A feature of the Buran-TRV modules produced at the enterprises of MPPA "EPOTOS" is the absence of standard surfactant foaming agents in the aqueous solution used, the service life of which is limited: 3 years of operation without recharging the modules. (see Explanatory letter from VNIIPO “On the service life of aqueous surfactant solutions”)
Buran-TRV modules use exclusively an aqueous solution of potassium acetate, which increases its frost resistance (up to minus 40°C) and allows the modules to be used for 10 years without recharging!

Testing of modules Buran-15 TRV "SPBEK-Mining" -2017

Currently, modular fire extinguishing systems with water mist and various settings(MUPTV) based on this technology are increasingly used as universal remedy fire extinguishing at protected facilities not only in Russia, but also abroad. The availability of water, its environmental friendliness, safety and high efficiency of extinguishing in a finely atomized state are the main reasons for the ever-increasing popularity of this modern technology using water as a fire extinguishing agent. Epotos specialists are constantly improving expansion valve modules, making changes to the design and technology of their production, and conducting numerous tests in order to eliminate the shortcomings of expansion valve products and expand the scope of their application.