EP1503829A1 - Fire extintion system and method - Google Patents

Fire extintion system and method

Info

Publication number
EP1503829A1
EP1503829A1 EP03725240A EP03725240A EP1503829A1 EP 1503829 A1 EP1503829 A1 EP 1503829A1 EP 03725240 A EP03725240 A EP 03725240A EP 03725240 A EP03725240 A EP 03725240A EP 1503829 A1 EP1503829 A1 EP 1503829A1
Authority
EP
European Patent Office
Prior art keywords
carboxylic acid
potassium salt
potassium
heat
icing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03725240A
Other languages
German (de)
French (fr)
Inventor
Timo Nissinen
Jari Kukkonen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kemira Oyj
Original Assignee
Kemira Oyj
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kemira Oyj filed Critical Kemira Oyj
Publication of EP1503829A1 publication Critical patent/EP1503829A1/en
Withdrawn legal-status Critical Current

Links

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
    • A62C3/002—Fire prevention, containment or extinguishing specially adapted for particular objects or places for warehouses, storage areas or other installations for storing goods
    • A62C3/004—Fire prevention, containment or extinguishing specially adapted for particular objects or places for warehouses, storage areas or other installations for storing goods for freezing warehouses and storages
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/58—Pipe-line systems
    • A62C35/60—Pipe-line systems wet, i.e. containing extinguishing material even when not in use
    • 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
    • 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
    • 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
    • A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
    • A62C3/10—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles in ships

Definitions

  • the invention relates to a fire extinction system and a fire extinction method, as well as to the use of an aqueous solution of a potassium salt of a carboxylic acid in such a system and method.
  • Aqueous solutions of potassium salts of a carboxylic acid such as potassium formiate and potassium acetate, are widely used as heat-transfer liquids and de- icers. They are also increasingly used for fire extinction and hydraulic purposes.
  • FI patent specification 101547 B discloses a heat-transfer agent, which contains potassium formiate dissolved in water in a concentration of preferably 40 to 65% by weight of the solution. This heat-transfer agent is proposed for use in the cooling of an object, in refrigeration apparatuses, for instance.
  • FI patent application 19992592 A discloses a hydraulic medium for use in hydrostatic power transfer, the medium containing an aqueous solution of salt of formic acid, such as potassium formiate.
  • the concentration of salt of formic acid may account for 5 to 75% by weight, preferably 5 to 60% by weight of the hydraulic medium.
  • WO-99/11327 discloses a fire extinguishing composition containing potassium acetate, boric acid and water.
  • a preferred composition contains 40% by weight of potassium acetate, 2% by weight of boric acid and 58% by weight of water.
  • the composition described can advantageously be used for extinguishing grease fires.
  • a small-sized container containing this composition can be placed under the ventilation hood of the stove.
  • the container is equipped with an automatic sprinkler, which is activated under the action of the heat generated by fire.
  • an aqueous solution of potassium acetate also acts as an extinguishing agent.
  • this salt solution acts as a non-freezing extinguishing agent and extinguishes an object on fire better than water does.
  • its quenching capacity is based on the fire-inhibiting effect of the potassium radical and on carbon dioxide generated by the decomposition of carboxylates.
  • the hygroscopity of the solution is one of the reasons for more effective fire extinction, because the water-binding effect reduces the risk of after- fire.
  • Potassium salts of carboxylic acids are effective heat-transfer liquids. They have high viscosity, thermal conductivity and specific heat capacity.
  • the phase diagram e.g. potassium formiate, eutectic temperature about - 80 °C
  • low viscosity of these salts enables them to be used at even quite low temperatures.
  • they are known as effective de-icing agents, at a faster rate and at a lower temperature than mineral salt, i.e. sodium chloride, which is widely used as a de-icer.
  • Potassium salts of carboxylic acids also have the benefit of low corrosive action, high operation safety and biodegradability, as well as good biostatics.
  • potassium salts are used either in one- component applications or in mixtures.
  • the purpose of this invention is to provide a system that acts simultaneously as a fire-extinction system and as a heat-transfer system, a de-icing system or a hydraulic system.
  • This invention is based on the idea of combining within the same system a heat transfer system and a fire fighting system, a de-icing system and a fire fighting system, or a hydraulic system and a fire fighting system, respectively, using the same medium, which is an aqueous solution of a potassium salt of a carboxylic acid.
  • a system which comprises a combination of a first system that is an extinguishing system including a fire- extinction agent and a second system, which is a heat-transfer system, a de-icing system or a hydraulic system and includes an aqueous medium, whereby as said extinguishing agent and as said aqueous medium the one and same aqueous solution of a potassium salt of a carboxylic acid is used.
  • the invention also provides a method for extinguishing a fire by means of an extinguishing agent, which is an aqueous solution of a potassium salt of a carboxylic acid and is taken from a system used for another purpose, i.e. from a heat-transfer system, a de-icing system or a hydraulic system.
  • the invention further provides a method for de-icing by means of a de-icer, which is an aqueous solution of a potassium salt of a carboxylic acid, which is taken from a system used for another purpose, i.e. from a fire-extinction system.
  • automatic extinguishing systems constructed e.g. for bridges and tunnels are also usable for keeping the road free from ice.
  • the heat-transfer system mentioned above may be an air-conditioning, cooling, heating or heat recovery system for ships, industry or real estate.
  • a further object of the invention is the use of an aqueous solution of a potassium salt of a carboxylic acid within one system as the extinguishing agent in fire extinction and as the heat-transfer medium, the de-icing medium or the hydraulic medium.
  • Said aqueous solution of a potassium salt of a carboxylic acid contains about 20 to 70 % by weight of the potassium salt of a carboxylic acid, preferably about 40 to 60 % by weight of the potassium salt of a carboxylic acid.
  • Said potassium salt of a carboxylic acid may be potassium formiate, potassium acetate, potassium propionate or a mixture of these.
  • This invention is based on the idea of combining fire prevention with the use of the potassium salt of carboxylic acids, or a mixture of these in refrigeration, heating, heat recovery, de-icing or hydraulic technology, i.e. generally in systems requiring the use of cold solutions due to the low temperature of the environment.
  • This combination may not in some cases be sufficient for the use as the sole quenching system due to its low pressure and/or small solution volume, but it can be used for the protection of critical objects, where the temperature of the environment is lower than the freezing point of water, allowing fire extinction to be started at once, without delay.
  • a fire-extinction system can be incorporated to a system directed for another purpose, i.e. to heat transfer, de-icing or hydraulic systems by using conventional equipment, such as various spraying or sprinkling devices, which may be automatic and/or valves and/or pipe works, depending on the object of use.
  • the extinguishing system of the invention preferably generates a droplet size in the range from 10 to 2000 ⁇ m, especially preferably in the range from 100 to 1000 ⁇ m.
  • the invention advantageously enables the introduction of fire-extinction facilities to various locations, and accelerates the on-set of the fire extinction, since no separate dry systems are needed for low temperatures. Moreover, it allows quick reaction to surprising fires with the use of de-icing agents for airports and roads in connection with fires occurring in the neighbouring area. Furthermore, the automatic de-icing systems provided for bridges and tunnels can be used for fire prevention.
  • the invention also yields economic gains owing to the reduced investment cost of the combination of the invention, since separate systems will not be needed. Moreover, in ships, for instance, there will be no extra weight caused by extinguishing systems.
  • the invention also has the advantage of lowering the threshold for building up an extinguishing system.
  • better extinction alertness is achieved with the combination of fire extinction and ground heat pumps
  • Air-conditioning, cooling, heating and heat-recovery systems are provided for ships. Due to low operating temperature, they often require the use of a cold solution instead of water.
  • the solution circuit included in such a system which contains a potassium salt of a carboxylic acid, has been combined with an extinguishing system in accordance with the invention.
  • Air-conditioning, cooling, heating and heat-recovery systems are provided for industries with the use of various cold solutions.
  • the solution circuit included in such a system which contains a potassium salt of a carboxylic acid, has been combined with an extinguishing system in accordance with the invention.
  • ground heat pumps a liquid containing a potassium salt of a carboxylic acid circulating in the ground circuit is extended in accordance with the invention also to the fire- extinction system of a garage, an attic or the like. Cooling facilities and a solar panel are frequently provided in connection with ground heat systems. In addition, the hot solution derived from the ground can also be circulated in a courtyard, resulting in fewer problems caused by snow and ice in the winter.
  • Aqueous solutions of a potassium salt of carboxylic acids are highly used at airports in the de-icing of runways and taxiways. In accordance with the invention, these substances can be simultaneously used in the initial extinction of an aircraft or the like that is on fire in the neighbourhood.
  • Example 6
  • Hydraulic mediums used in forestry equipments or the like which contain aqueous solutions of a potassium salt of carboxylic acids, are utilised in fire extinction in accordance with the invention.

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Operations Research (AREA)
  • Fire-Extinguishing Compositions (AREA)

Abstract

The invention relates to a system comprising a combination of a first system, which is an extinguishing system including an extinguishing agent, and a second system, which is a heat-transfer system, a de-icing system or a hydraulic system including an aqueous medium, one and the same aqueous solution of potassium salt of carboxylic acid being used as said aqueous medium.

Description

Fire extinction system and method
The invention relates to a fire extinction system and a fire extinction method, as well as to the use of an aqueous solution of a potassium salt of a carboxylic acid in such a system and method.
Aqueous solutions of potassium salts of a carboxylic acid, such as potassium formiate and potassium acetate, are widely used as heat-transfer liquids and de- icers. They are also increasingly used for fire extinction and hydraulic purposes.
FI patent specification 101547 B discloses a heat-transfer agent, which contains potassium formiate dissolved in water in a concentration of preferably 40 to 65% by weight of the solution. This heat-transfer agent is proposed for use in the cooling of an object, in refrigeration apparatuses, for instance.
FI patent application 19992592 A discloses a hydraulic medium for use in hydrostatic power transfer, the medium containing an aqueous solution of salt of formic acid, such as potassium formiate. The concentration of salt of formic acid may account for 5 to 75% by weight, preferably 5 to 60% by weight of the hydraulic medium.
WO-99/11327 discloses a fire extinguishing composition containing potassium acetate, boric acid and water. A preferred composition contains 40% by weight of potassium acetate, 2% by weight of boric acid and 58% by weight of water. The composition described can advantageously be used for extinguishing grease fires. In that case, a small-sized container containing this composition can be placed under the ventilation hood of the stove. The container is equipped with an automatic sprinkler, which is activated under the action of the heat generated by fire.
Consequently an aqueous solution of potassium acetate also acts as an extinguishing agent. Studies have indicated that this salt solution acts as a non-freezing extinguishing agent and extinguishes an object on fire better than water does. According to literature, its quenching capacity is based on the fire-inhibiting effect of the potassium radical and on carbon dioxide generated by the decomposition of carboxylates. The hygroscopity of the solution is one of the reasons for more effective fire extinction, because the water-binding effect reduces the risk of after- fire.
Potassium salts of carboxylic acids are effective heat-transfer liquids. They have high viscosity, thermal conductivity and specific heat capacity. The phase diagram (e.g. potassium formiate, eutectic temperature about - 80 °C) and low viscosity of these salts enables them to be used at even quite low temperatures. In addition, they are known as effective de-icing agents, at a faster rate and at a lower temperature than mineral salt, i.e. sodium chloride, which is widely used as a de-icer.
Potassium salts of carboxylic acids also have the benefit of low corrosive action, high operation safety and biodegradability, as well as good biostatics.
In the applications mentioned above, potassium salts are used either in one- component applications or in mixtures.
The purpose of this invention is to provide a system that acts simultaneously as a fire-extinction system and as a heat-transfer system, a de-icing system or a hydraulic system.
This invention is based on the idea of combining within the same system a heat transfer system and a fire fighting system, a de-icing system and a fire fighting system, or a hydraulic system and a fire fighting system, respectively, using the same medium, which is an aqueous solution of a potassium salt of a carboxylic acid.
In accordance with the invention, a system is thus provided, which comprises a combination of a first system that is an extinguishing system including a fire- extinction agent and a second system, which is a heat-transfer system, a de-icing system or a hydraulic system and includes an aqueous medium, whereby as said extinguishing agent and as said aqueous medium the one and same aqueous solution of a potassium salt of a carboxylic acid is used.
The invention also provides a method for extinguishing a fire by means of an extinguishing agent, which is an aqueous solution of a potassium salt of a carboxylic acid and is taken from a system used for another purpose, i.e. from a heat-transfer system, a de-icing system or a hydraulic system. The invention further provides a method for de-icing by means of a de-icer, which is an aqueous solution of a potassium salt of a carboxylic acid, which is taken from a system used for another purpose, i.e. from a fire-extinction system. Accordingly, automatic extinguishing systems constructed e.g. for bridges and tunnels are also usable for keeping the road free from ice.
The heat-transfer system mentioned above may be an air-conditioning, cooling, heating or heat recovery system for ships, industry or real estate.
A further object of the invention is the use of an aqueous solution of a potassium salt of a carboxylic acid within one system as the extinguishing agent in fire extinction and as the heat-transfer medium, the de-icing medium or the hydraulic medium.
Said aqueous solution of a potassium salt of a carboxylic acid contains about 20 to 70 % by weight of the potassium salt of a carboxylic acid, preferably about 40 to 60 % by weight of the potassium salt of a carboxylic acid.
Said potassium salt of a carboxylic acid may be potassium formiate, potassium acetate, potassium propionate or a mixture of these.
This invention is based on the idea of combining fire prevention with the use of the potassium salt of carboxylic acids, or a mixture of these in refrigeration, heating, heat recovery, de-icing or hydraulic technology, i.e. generally in systems requiring the use of cold solutions due to the low temperature of the environment. This combination may not in some cases be sufficient for the use as the sole quenching system due to its low pressure and/or small solution volume, but it can be used for the protection of critical objects, where the temperature of the environment is lower than the freezing point of water, allowing fire extinction to be started at once, without delay.
In accordance with the invention, a fire-extinction system can be incorporated to a system directed for another purpose, i.e. to heat transfer, de-icing or hydraulic systems by using conventional equipment, such as various spraying or sprinkling devices, which may be automatic and/or valves and/or pipe works, depending on the object of use. The extinguishing system of the invention preferably generates a droplet size in the range from 10 to 2000 μm, especially preferably in the range from 100 to 1000 μm.
The invention advantageously enables the introduction of fire-extinction facilities to various locations, and accelerates the on-set of the fire extinction, since no separate dry systems are needed for low temperatures. Moreover, it allows quick reaction to surprising fires with the use of de-icing agents for airports and roads in connection with fires occurring in the neighbouring area. Furthermore, the automatic de-icing systems provided for bridges and tunnels can be used for fire prevention.
The invention also yields economic gains owing to the reduced investment cost of the combination of the invention, since separate systems will not be needed. Moreover, in ships, for instance, there will be no extra weight caused by extinguishing systems.
The invention also has the advantage of lowering the threshold for building up an extinguishing system. In private houses, for instance, better extinction alertness is achieved with the combination of fire extinction and ground heat pumps
The invention is described in further detail below by means of examples.
Example 1
Air-conditioning, cooling, heating and heat-recovery systems for ships
Air-conditioning, cooling, heating and heat-recovery systems are provided for ships. Due to low operating temperature, they often require the use of a cold solution instead of water. The solution circuit included in such a system, which contains a potassium salt of a carboxylic acid, has been combined with an extinguishing system in accordance with the invention.
Example 2
Industrial air-conditioning, cooling, heating and heat-recovery systems
Air-conditioning, cooling, heating and heat-recovery systems are provided for industries with the use of various cold solutions. The solution circuit included in such a system, which contains a potassium salt of a carboxylic acid, has been combined with an extinguishing system in accordance with the invention.
Example 3
Air-conditioning, cooling, heating and heat-recovery systems for real estate buildings
Many real estate buildings comprise air conditioning, cooling, heating and heat recovery by means of cold solutions. The solution circuit included in such systems, which contain a potassium salt of a carboxylic acid, has been combined with a fire- extinction system in accordance with the invention.
Example 4
Ground heat pumps
One of the most recent applications of cold solutions comprise ground heat pumps. In these, a liquid containing a potassium salt of a carboxylic acid circulating in the ground circuit is extended in accordance with the invention also to the fire- extinction system of a garage, an attic or the like. Cooling facilities and a solar panel are frequently provided in connection with ground heat systems. In addition, the hot solution derived from the ground can also be circulated in a courtyard, resulting in fewer problems caused by snow and ice in the winter.
Example 5
De-icing of airports
Aqueous solutions of a potassium salt of carboxylic acids are highly used at airports in the de-icing of runways and taxiways. In accordance with the invention, these substances can be simultaneously used in the initial extinction of an aircraft or the like that is on fire in the neighbourhood. Example 6
Fire prevention of bridges and tunnels
Automatic de-icing systems using solutions are frequently provided for bridges and tunnels. Such systems containing aqueous solutions of a potassium salt of carboxylic acids are used in accordance with the invention also as an initial extinction system for fires that may arise on bridges and in tunnels. Respectively, extinction systems provided for tunnels, for instance, can be used for keeping the roads free from ice.
Example 7
Hydraulics
Hydraulic mediums used in forestry equipments or the like, which contain aqueous solutions of a potassium salt of carboxylic acids, are utilised in fire extinction in accordance with the invention.

Claims

Claims
1. A system, characterised in comprising, a combination of a first system, which is an extinguishing system including an extinguishing agent, and a second system, which is a heat-transfer system, a de-icing system or a hydraulic system and comprises an aqueous medium, whereby as said extinguishing agent and as said aqueous medium the one and same aqueous solution of a potassium salt of a carboxylic acid is used.
2. A system as defined in claim 1, characterised in that the heat-transfer system is an air-conditioning, cooling, heating or heat recovery system for ships, industry or real estate.
3. A system as defined in claim 1 or 2, characterised in that said aqueous solution contains 20 to 70% by weight of the potassium salt of a carboxylic acid, preferably
40 to 60% by weight of the potassium salt of carboxylic acid.
4. A system as defined in any of the preceding claims, characterised in that the potassium salt of a carboxylic acid is potassium formiate, potassium acetate or potassium propionate, or a mixture of these.
5. The use of an aqueous solution of a potassium salt of a carboxylic acid within the same system as the extinguishing agent in fire extinction and as a heat-transfer, de- icing or hydraulic medium.
6. The use of claim 5, characterised in that said aqueous solution contains 20 to 70% by weight of the potassium salt of a carboxylic acid, preferably 40 to 60% by weight of the potassium salt of a carboxylic acid.
7. Application as defined in claim 5 or 6 characterised in that the potassium salt of a carboxylic acid is potassium formiate or potassium acetate or a mixture of these.
8. A method for fire extinction by means of an extinguishing agent, characterised in that the extinguishing agent is an aqueous solution of a potassium salt of a carboxylic acid, which is taken from a system used for another purpose, which system for another purpose is a heat-transfer system, a de-icing system or a hydraulic system.
9. A method as defined in claim 8, characterised in that the heat-transfer system is an air-conditioning, cooling, heating or heat recovery system for ships, industry or real estate.
10. A method for de-icing by means of a de-icing agent, characterised in that the de-icing agent is an aqueous solution of a potassium salt of a carboxylic acid, which is taken from a system used for another purpose, which system for another purpose is an extinguishing system.
11. A method as defined in any of claims 8 to 10, characterised in that said aqueous solution contains 20 to 70% by weight of the potassium salt of a carboxylic acid, preferably 40 to 60% by weight of the potassium salt of a carboxylic acid.
12. A method as defined in any of claims 8 to 11, characterised in that the potassium salt of a carboxylic acid is potassium formiate, potassium acetate or potassium propionate, or a mixture of these.
EP03725240A 2002-05-15 2003-05-14 Fire extintion system and method Withdrawn EP1503829A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20020914A FI113012B (en) 2002-05-15 2002-05-15 Fire extinguishing system and method
FI20020914 2002-05-15
PCT/FI2003/000371 WO2003097172A1 (en) 2002-05-15 2003-05-14 Fire extintion system and method

Publications (1)

Publication Number Publication Date
EP1503829A1 true EP1503829A1 (en) 2005-02-09

Family

ID=8563941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03725240A Withdrawn EP1503829A1 (en) 2002-05-15 2003-05-14 Fire extintion system and method

Country Status (4)

Country Link
EP (1) EP1503829A1 (en)
AU (1) AU2003231334A1 (en)
FI (1) FI113012B (en)
WO (1) WO2003097172A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX2010013083A (en) * 2008-05-30 2011-03-15 Kiddie Fenwal Inc Star Fire extinguishing composition.
CN109304003A (en) * 2017-07-26 2019-02-05 南京高昇消防药剂有限公司 A kind of preparation method of dry powder fire extinguishing agent

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1190796B (en) * 1962-08-03 1965-04-08 Soc Etu Chimiques Ind Et Agri Fire extinguishers
WO1999011327A2 (en) * 1997-09-02 1999-03-11 Mikulec Conrad S Fire extinguishing composition
US6506318B1 (en) * 1997-09-30 2003-01-14 Mli Associates, Llc Environmentally benign anti-icing or deicing fluids

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03097172A1 *

Also Published As

Publication number Publication date
FI20020914A0 (en) 2002-05-15
FI20020914A7 (en) 2003-11-16
FI113012B (en) 2004-02-27
AU2003231334A1 (en) 2003-12-02
WO2003097172A1 (en) 2003-11-27

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