Method of extinguishing forest fires

 

The invention relates to the field of fire-fighting equipment, and in particular to methods of extinguishing forest fires using explosives), heat-sensitive fire-extinguishing powder formulations (TRAPS) and gas-dispersed fire extinguishing compositions, filled into containers and modules fire. The essence of the method lies in the fact that along with the fact that in the horse area fire form the front of a shock wave generated from simultaneously discharged with checkers explosives or detonation cord or pre-containers with a mixture fire extinguishing substances capable of detonation from the above checkers explosives or detonation cord, creeping fire extinguish using fire extinguishing modules discharged on Board the aircraft or installed in advance in front of the fire, from thermal or electrical impulse to carry out the supply of extinguishing agent in parallel and/or at an angle to the surface location through radially spaced 360° nozzle with a flow rate not less than 70 m/s and with an intensity of not less than 0.01 kg/s·m2and the supply of extinguishing agent through the nozzle thus leading to neighboring streams throughout extinguishing of the lengths of the RA products of combustion in the above-mentioned adhesion and thus forming a continuous circular extinguishing zone. This helps to ensure a high degree of reliability extinguishing of forest crown and ground fires. 4 C.p. f-crystals, 1 Il.

The invention relates to the field of fire-fighting equipment, and in particular to methods of extinguishing forest (upper and lower) fires using explosives), heat-sensitive fire-extinguishing powder formulations (TRAPS) and gas-dispersed fire extinguishing compositions, filled into containers and modules firefighting discharged into the zone of fire from the aircraft.

Known methods of fighting forest fires with the use of EXPLOSIVES, detonating cords (DT), explosive fire devices, fed into the zone of fire water or hot water, or water solutions, or fire extinguishing powders, creating a pre-installed reflective screens, fuel-air explosive fuel-air clouds and creating in front of the fire barrier strips [1-8].

The disadvantage of all these methods is the low reliability extinguish simultaneously crown and ground fires at high unit costs of extinguishing agent.

One of the similar suppression of fires explosion is a way, described the RT 2, p. 114. article: N. P. Kopylov, E. A. Moskvitin and other Extinguishing fires explosion. - M., 2001 [9]. In this work, the experiments were carried out to extinguish forest fires, solid combustible materials and flammable liquids. The explosion was created by the detonation TNT checkers, and the air waves ranged on the excess pressure of from 0.02 to 0.15 kgf/cm2and the duration of the positive phase of the pressure from 0.01 to 0.2 C. as a result of experiments, it was found that the main indicator in determining the process of extinguishing fire by the explosion, is the duration of the positive phase of the pressure. It was found that conventional EXPLOSIVES (except for the shock wave of a nuclear explosion) fully fire to extinguish it is impossible, because after a breakdown flame shock after a while the burning was resumed. As follows from the description of this explosive extinguishing method, its main drawback is the low probability of crown fire extinguishing and the impossibility of extinguishing the ground fire.

As the closest analogue accepted method of extinguishing forest fires, including the creation in the fire zone of the shock wave by remote detonation checkers explosives or detonation the heat of the shock wave front form of the simultaneously discharged with checkers explosives or detonation cord, or pre-containers with a mixture fire extinguishing substances capable of detonation from the above checkers explosives or detonation cord (patent of Russia №2111032, class. And 62 With 3/02, publ. 20.05. 998).

The objective of the invention is to develop (create) method with a high degree of reliability extinguishing of forest crown and ground fires.

This object is achieved in that in the known method of extinguishing forest fires, including the creation of a horse in the fire zone of the shock wave generated from simultaneously discharged with checkers explosives or detonation cord, or installed in advance of the containers with a mixture fire extinguishing substances capable of detonation from the above checkers explosives or detonation cord, according to the invention, in the grassroots area fire extinguish using fire extinguishing modules discharged on Board the aircraft or installed in advance in front of the fire, from thermal or electrical impulse to carry out the supply of extinguishing agent in parallel and/or at an angle to the surface location through radially spaced 360° nozzle with a flow rate not less than 70 m/s and with an intensity of not less than 0.01 of all fire-extinguishing length do not overlap, creating discontinuities in the formed discharge, providing suction from the upper zone of fire combustion products in the above adhesion, and thus forming a continuous circular extinguishing zone.

At the same time as a mixture of extinguishing agent used heat-sensitive extinguishing powder compositions based on complex nitrogen-phosphate "NP" and/or isotopically fertilizer "NPK" when the ratio of nitrogen, phosphorus and potassium in terms of N:P2About5K2O for nitrogen-phosphate fertilizers from (12-35) nitrogen before (12-52) P2O5for isotopically fertilizers as(15-30):(10-50):(20-30).

Later in the extinguishing agent in fire extinguishing modules use of gas-dispersed composition comprising highly dispersed additive, the target additive for fluidity, gidrofobiziruyuschey kremniiorganicheskie liquid, powdery nitrogen-phosphate complex and/or azotobacteraceae fertilizer, liquid and/or gaseous phlegmatizer, and/or liquid and/or gaseous combustion inhibitor. When this heat-sensitive fire-extinguishing powder formulations used in the form of powder or granulated and/or compressed charge and/or solution in polar and/or Napoleona and heat-sensitive fire-extinguishing powder composition, supplied for fire fighting, horse area take within from 0.003:1 to 1:1, and the mass ratio of extinguishing agent supplied to upper and lower zones of fire, take in the range from 1:1 to 1:50.

The invention is carried out using all the listed signs and illustrated by a drawing showing the flow of extinguishing agent on 360° from the module through radially spaced nozzles. For clarity, the module is not perpendicular and parallel to the surface of the earth.

An example implementation of the method. The experimental technique described in method-prototype [9]. As containers for CROPS used multiwall paper bags with polyethylene liner. In the bag was filled in CROPS on the basis of complex fertilizer "NPK" 28:15:0, or a mixture of "NPK" 28:7:12, or a mixture of these fertilizers in the ratio of 1:1 equivalent mixture 28:11:6. Inside of the bag with the composition of the weighing 30 kg was put in charge of trinitrotoluene checkers mass of 200 g with a detonator and the container was sealed.

Made so the container was installed in the air-shock tube size section of 2,5 m×2,5 m

In the direction of the shock wave were placed at different distances to the foci of wood with an area of 1 m2. PTS is and has been 100% without the fire.

To simulate extinguishing ground forest fires was used powder fire extinguishing module MPP "BiZone-200 with a capacity of 200 kg of gas-dispersed composition [11] and provides 360° 36 nozzles spraying the entire gas-dispersed composition within 3-4 C. At various distances from CMP-200 were dead trunks of coniferous trees with a diameter of 20-30 cm and a height of 2.5-3 m After ignition of wood and after the time of rise of about 7±1 min from the electric pulse was launched CMP "BiZone-200". Fighting without re-ignition was observed in 100% of cases on the square radius of up to 15 meters When installed in place of the CMP-200 container with 30 kg TRAPS and testing on the same area fighting without re-ignition in 100% of cases took place in the volume with a radius of ~6 m, i.e., the area S113 m2and volume800 m3. Thus 7 containers with a total weight of RESP210 kg will provide suppression square800 m2. WFP "BiZone-200" mass RESP 200 kg provide suppression in the area of 700 m2, i.e. the combined use of 7 containers and one module of the proposed method will provide suppression 32D/chr/8776.gif" border="0">0,5-0,6 kg/m2. For comparison, the seaplane Ve-200 with a load of water weight of 12 tons extinguish a forest fire in the area from 1000 to 5000 m2, i.e., specific consumption2,4-12 kg/m2[12].

The list of sources used.

1. Inventor's certificate SU # 1266549 And 62 With 19/00 from 06.05.85, a Device for extinguishing forest fires explosion.

2. Inventor's certificate SU # 1614811 And 1, And 62 With 2/00. The method of extinguishing fires.

3. Inventor's certificate SU # 1789232 And 1, And 62 With 2/00 from 16.08.89, a Method for localizing and extinguishing of forest fires.

4. Inventor's certificate SU # 1834667 And 3, And 62 With 2/00 from 23.05.91,

5. Inventor's certificate SU # 1405848 And 1, And 62 With 3/02. The method of localization and extinguishing of forest fires.

6. Inventor's certificate SU # 1651199 And 1, And 62 With 3/02 from 03.01.89, Method of extinguishing forest fires.

7. Inventor's certificate SU # 1644976, class. And 62 With 3/02, 1988

8. Y. N. Tenchijin, V. A. Guzenko. The extinguishing of forest fires directed blasts //Sat. Large fires: prevention and extinguishing. - Proceedings of the XVI scientific-practical conference. - M.: Institute, 2001, S. 112-114.

9. N. P. Kopylov, A. Moskvitin. Extinguishing fires explosion. //Sat. Large fires: prevention and extinguishing. - Proceedings of the XVI scientific-practical conference>1.Application for patent of the RF No. 2003124360 from 07.08.2003,

The fire extinguishing composition.

12. PROCEEDINGS. WORLD LAND & FOREST FIRE HAZARDS/ Malaysia, 2002.

Claims

1. Method of extinguishing forest fires, including the creation of a horse in the fire zone of the shock wave generated from simultaneously discharged with checkers explosives or detonation cord, or installed in advance of the containers with a mixture fire extinguishing substances capable of detonation from the above checkers explosives or detonation cord, characterized in that in the grassroots area fire extinguish using fire extinguishing modules discharged on Board the aircraft or installed in advance in front of the fire, from thermal or electrical impulse to carry out the supply of extinguishing agent in parallel and/or at an angle to the surface location through radially spaced 360° nozzle with a flow rate not less than 70 m/s and with an intensity of not less than 0.01 kg/s·m2and the supply of extinguishing agent through the nozzle are such that adjacent jets along the entire length do not overlap, the mixture extinguishing agent containers using heat-sensitive extinguishing poroshkovaya, phosphorus and potassium in terms of N:P2O5K2O for nitrogen-phosphate fertilizers from (12÷35) for nitrogen to (12÷52) P2O5for isotopically fertilizers as(15÷30):(10÷50):(20÷30).

2. The method according to p. 1, characterized in that the extinguishing agent in fire extinguishing modules use of gas-dispersed composition comprising highly dispersed additive, the target additive for fluidity, gidrofobiziruyuschey kremniiorganicheskie liquid, powdery nitrogen-phosphate complex and/or azotobacteraceae fertilizer, liquid and/or gaseous phlegmatizer and/or liquid and/or gaseous fire retardant.

3. The method according to p. 1, characterized in that the heat-sensitive fire-extinguishing powder formulations used in the form of powder or granulated and/or compressed charge and/or solution in polar and/or nonpolar solvent, and the diameter and mass of the charge take more critical.

4. Method of extinguishing forest fires according to any one of paragraphs.1-3, characterized in that the ratio of the weight of explosives and heat-sensitive fire-extinguishing powder composition applied to extinguish fires in horse area, take in the range from 0.003:1 to 1:1, and the mass ratio of agnatus the

 

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