When putting out small fires such as sundries in ashtrays and pieces of waste paper in wastebaskets, the correct way is to cover them with fire extinguishers and wet towels.
When putting out small fires such as sundries in ashtrays and pieces of waste paper in wastebaskets, the correct way is to cover them with fire extinguishers and wet towels. However, wet towel covering is suitable for small fires, and covering the fire source with wet towel can quickly reduce the temperature of the fire source, thus extinguishing the fire source. Fire extinguisher is a portable fire extinguishing tool. Chemicals are placed in the fire extinguisher to put out the fire.
Fire extinguishers are one of the common fire-fighting equipment. They are stored in public places or places where fires may occur. Different types of fire extinguishers are filled with different ingredients and are specially designed for different fires. Attention must be paid to avoid counterproductive and dangerous use.
Introduction to the use of fire extinguisher:
Fire extinguisher is a necessary thing for fire fighting, which is often neglected by people at ordinary times and shows its talents when it is urgently needed. Especially in today's high-rise buildings and indoor decoration with a lot of wood, plastic and fabric, once there is a fire, there is no proper fire extinguishing equipment, which may lead to great disaster. In ancient times, the fire-fighting equipment was very simple, nothing more than hooks, axes, shovels, buckets and the like. The first real special fire extinguisher was invented by Manby, a British captain and Norfolk in 1816. It was only one or two drums filled with more than 1 liter of water and compressed air.
by the mid-19th century, French doctor Galileo invented the portable chemical fire extinguisher. Mix sodium bicarbonate and water in a barrel, and put sulfuric acid in a glass bottle in the mouth of the barrel. When in use, the hammer breaks the bottle, so that the chemicals are mixed, carbon dioxide is generated, and the water pressure is discharged out of the barrel.
In p>195, Professor Laurent of Russia invented a foam fire extinguishing agent in St. Petersburg. Aluminum sulfate was mixed with sodium bicarbonate solution and added with stabilizer. After spraying, foam containing carbon dioxide was generated and floated on burning oil, paint or gasoline, which could effectively isolate oxygen and smother the flame.
In p>199, Davidson of new york obtained a patent to use carbon dioxide to press carbon tetrachloride out of a fire extinguisher, and this liquid will immediately become a non-combustible heavier gas to smother the flame. Since then, dry powder fire extinguishers, liquid carbon dioxide fire extinguishers and other small fire extinguishers have appeared.