1, heptafluoropropane fire extinguishing device mainly uses heptafluoropropane gas as fire extinguishing agent. Heptafluoropropane fire extinguishing devices can be roughly divided into three categories: pipeline heptafluoropropane fire extinguishing devices, cabinet heptafluoropropane fire extinguishing devices and suspended heptafluoropropane fire extinguishing devices.
The heptafluoropropane fire extinguishing agent in heptafluoropropane fire extinguishing device is a colorless, odorless, non-conductive and non-secondary pollution gas, which has the characteristics of cleanliness, low toxicity, good electrical insulation and high fire extinguishing efficiency.
In particular, it has no damage to the ozone layer, and its residual time in the atmosphere is relatively short, and its environmental protection performance is obviously better than halon. It is a clean gas fire extinguishing agent that has been successfully developed, and is considered as the most ideal product to replace halon 130 1, 12 1 1.
2. Carbon dioxide fire extinguishing agent is a kind of fire extinguishing agent with a history of 100 years. It is cheap and easy to obtain and prepare. Mainly rely on suffocation and local cooling to extinguish the fire. The density of carbon dioxide is high, which is about 1.5 times that of air.
At normal pressure, liquid carbon dioxide will vaporize immediately. Generally 1kg liquid carbon dioxide can produce about 0.5 cubic meters of gas. Therefore, when putting out a fire, carbon dioxide gas can exclude air and surround the surface of the combustion product or distribute in a relatively closed space, thus reducing the oxygen concentration around the combustible or in the protective space, causing suffocation and extinguishing the fire.
In addition, when carbon dioxide is ejected from the storage container, it will quickly vaporize from the liquid into gas, and absorb some heat from the surrounding area to cool down.
3. Dry powder fire extinguisher is a kind of fire extinguisher, which can be divided into: ordinary dry powder fire extinguisher; Superfine dry powder fire extinguisher. The dry powder fire extinguisher is equipped with dry powder extinguishing agent such as ammonium phosphate, which is easy to flow and dry. It is composed of inorganic salts and grinding and drying additives, which can effectively extinguish the initial fire.
4. The acid-base fire extinguisher consists of cylinder, cylinder head, sulfuric acid bottle liner and nozzle. The steel cylinder is filled with sodium bicarbonate aqueous solution, and the sulfuric acid bottle is filled with concentrated sulfuric acid.
There is a lead plug in the bottle mouth to seal the bottle mouth to prevent the concentrated sulfuric acid in the bottle from being diluted by water or mixed with the liquid medicine outside the bottle. The principle of acid-base fire extinguisher is to use the chemical reaction after mixing two chemicals to produce pressure to make the chemicals spray out, thus extinguishing the fire.
5. The water-type fire extinguisher is equipped with AFFF water film foam extinguishing agent and nitrogen, which has the advantages of simple operation, high fire extinguishing efficiency, long validity period, re-ignition prevention and double fire extinguishing. It can put out the initial fire of combustible solids and liquids, and is a fire-fighting necessity for the development, processing, storage and transportation of wood and bamboo, fabrics, paper and oils.