Classifications

• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62C—FIRE-FIGHTING
  • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
  • A62C3/06—Fire prevention, containment or extinguishing specially adapted for particular objects or places of highly inflammable material, e.g. light metals, petroleum products
• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
  • A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
  • A62D1/0028—Liquid extinguishing substances
  • A62D1/0035—Aqueous solutions

Definitions

• the invention relates to a fire extinguishing solution for extinguishing phosphorus and metal fires and a method for their production.
• the invention has for its object to provide a fire extinguishing solution for the purpose mentioned as a fine sprayable foam-free mixture with a very high wetting effect.
• the invention makes use of a modification of the "Reinhartin brine” and achieves frost resistance down to - 40 ° C with a protective colloid.
• the density of the total solution at 0 ° C is 1.83.
• the sprayed fire extinguishing solution acts as a fertilizer, which makes recultivation easier.
• the fire extinguishing solution according to the invention is particularly suitable for fighting red phosphorus and against metal fires (fire classes A and D)>
• the use of the agent according to the invention in fire fighting has the following effects: - Increase frost resistance to - 30 ° C - High wetting ability without the addition of foam-forming surfactants - High depth effect with simultaneous crystalline crust formation - anti-corrosive - nitrogen oxide formation at high temperatures (fire source) - Fire retardant dust control - In addition to the depth effect, different crystal formation creates a homogeneous, crystalline surface-covering crust - Chain interruption of the combustible gases with simultaneous conversion into non-combustible substances - Due to the high proportion of minerals, the agent has a long-acting fertilizing effect when combating forest and steppe fires.
• MgCL2 Magnesium chloride MgCL2 is readily soluble in water. Evaporative, monoclinic crystals form, the density of MgCL2 is 2.316 - 2.33. With strong heating (extinguishing process) decomposition occurs with the formation of oxychloride. This oxide chloride has a corrosive effect on aluminum and chrome parts. This corroding is prevented by a protective group added to the overall solution.
• MgCL2 is used in this case.
• MgCl2 are dissolved in 100 gr. Water.
• CaCL2 Calcium chloride CaCL2 is easily soluble in water. A porous, colorless mass forms when heated above 200 ° C. The density of CaCL2 is 1.68.
• CaCL2 As a protective group, CaCL2 has a strong corrosion-inhibiting effect on MgCL2. This eliminates the risk of corrosion.
• CaCL2 As already described for MgCL2, the fire extinguishing effect is known. Furthermore, CaCL2 is very suitable for binding coal dust in mining, and thus dust explosions are treated preventively. In the main for the present fire extinguishing agent, CaCL2 is used to increase and stabilize the frost resistance.
• K2SO4 Potassium sulfate K2SO4 is relatively easily soluble in water. Colorless crystalline crusts form on evaporation. The density of K2SO4 is 2.67.
• Evaporation of the saturated K2SO4 solution forms a relatively homogeneous crystalline crust, which prevents the supply of atmospheric oxygen, or the oxygen released by the heat from the source of the fire and bound up to that point.
• a sensible solution up to the saturation limit is 100 gr. Water and 16.5 gr. K2SO4, while maintaining a constant temperature of 50 ° C.
• the Na2SiO3 is the main component of the extinguishing agent described here in that the solution has a strong wetting effect and thereby transports all dissolved salts including their own into the source of the fire and thus builds up a barrier layer of crystallized salts which acts deeply into the source of the fire during evaporation.
• Diammonium hydrogenphosphate (NH4) 2HPO4 readily soluble in water. Coarse crystalline precipitate forms on evaporation.
• ammonium phosphates When heated, the ammonium phosphates decompose to form ammonia and polyphosphoric acid. Ammonia and polyphosphoric acid cause an interruption in the molecular chains, which are significant for the development or further development of a fire. Thereby this phosphate is an effective flame retardant and is suitable, especially in the combination given here, for fighting forest and steppe fires. This solution also has a long-acting fertilizing effect on the treated plant area.
• the effect of the buffer substances is based on the trapping of hydrogen or hydroxide ions with the formation of weak acids or bases due to their dissociation equivalent.
• the task of the buffer solution is to adjust the total solution to a pH of 8. A commercially available buffer solution that works according to NaOH is used for this. To adjust the pH value of 8, 46.7 ml are added to 1000 ml of total solution.
• the correct solutions I-III are determined using a hydrometer (DIN 12 791 sheet 1 and sheet 2 1969).
• Solutions IV-V are determined by pH measurement, but can also be determined with a hydrometer.
• All rooms must have good ventilation systems.
• the operating personnel must be equipped with rubber gloves, safety glasses and rubber aprons.
• the moving machine parts such as valves, stirrers and pumps, have to be cleaned regularly with hot water , otherwise the material will wear out too much due to the incrustations.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Engineering & Computer Science (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Health & Medical Sciences (AREA)
• Public Health (AREA)
• Fireproofing Substances (AREA)
• Fertilizers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6311227

Family Applications (1)

Country Status (2)

Cited By (7)

Citations (8)

• 1986
  • 1986-10-07 DE DE19863634125 patent/DE3634125A1/de not_active Withdrawn
• 1987
  • 1987-10-07 EP EP87202050A patent/EP0263570A1/fr not_active Withdrawn

Patent Citations (8)

Non-Patent Citations (1)

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