- Author
-
Ball, D. N.
|
Spring, D. J.
|
Davies, S. J.
- Title
- Fire Extinguishing Substance.
- Coporate
- Kidde-Graviner Ltd., Derby, England
- Report
-
UK Patent GB 2,233,226A,
June 21, 1990,
13 p.
- Keywords
-
fire extinguishers
|
water
|
carbon dioxide
|
nitrous oxides
- Abstract
- A fire extinguisher comprises a container containing water which is pressurised by relatively high presure gas e.g. carbon dioxide or nitrous oxide within a space. Because of its solubility in water, a substantial amount of carbon dioxide is held in the water in solution. When a valve arrangement opens, the gas pressure within the container ejects the water through an outlet, initially in the form of relatively large droplets which, because of their size, are optimally projected towards the seat of the fire. However, as the droplets are projected towards the fire, the carbon dioxide dissovled in each droplet comes out of solution and breaks the droplets up into smaller droplets, thus very significantly increasing the fire extinguishant capability of the water. The water may include phosphates, carbonates, amino compounds and/or citrates for increasing the solubility of the carbon dioxide in the water and may also include an anti-freeze agent and a surfactant.