(1) A good helper for family fire fighting - salt In the home kitchen, there is a small fire. If there is no fire-fighting equipment, use the existing items in the kitchen to extinguish the fire. Salt is a household fire extinguishing agent that can be selected in an emergency. Salt is widely used in daily life. It is an indispensable condiment and an effective fire extinguishing agent for fighting fires. The main component of salt is sodium chloride (NaCl). Under high temperature fire, it can be quickly decomposed into sodium hydroxide. By chemical action, it absorbs free radicals in the combustion process and inhibits the combustion. When the amount of salt used for fire extinguishing is sufficient, more free radicals are consumed than combustion-decomposed free radicals, resulting in interruption of the combustion reaction. Some granular salt in the family is an effective fire extinguishing agent for the fire and solid smoldering fire. Because of the large particle size and high water content, the granular salt absorbs heat and expands rapidly at high temperature, destroys the shape of the flame, and at the same time generates an endothermic reaction, diluting the oxygen concentration in the combustion zone, so that the fire is quickly extinguished. The fire-fighting property of salt can be used even in normal times. The fine salt surface, uniform particles, and a certain amount of water are good helpers for extinguishing oil fires. (2) The magical use of towels When people travel at home, they always have to deal with towels. Usually use it to wipe your hands, wipe your face, remove sweat and decontaminate. However, have you ever known how it works? (1) In the hotel, people use gas or liquefied petroleum gas to boil water to cook. If you have a soaked towel, put it on the side. If the gas pipe or the LPG nozzle leaks, catch it with wet. That is to say, quickly shut down the valve to avoid a fire. (2) When the chef cooks and cooks, he often puts a wet towel around him. If the oil pan is quickly set on the fire, it will be extinguished immediately. (3) In a specific case, a wet towel can also be used as a gas mask. The secret is that the towel has a smoke removal effect. When taking refuge in the smoke of a fire, you can use a towel to cover your mouth and nostrils, and quickly rush out of the fire to escape. Tests have shown that the more folds the towel has, the better the smoke removal effect, but The emergency of the fire is limited to 8 layers, and the smoke removal rate is about 60%. In the place where smoke is concentrated, since the smoke particles are large, the adhesion is blocked on the network of the towel, so the smoke removal rate increases with time. Experiment with a 20-fold towel. After 3 to 4 minutes, the smoke removal rate is 100%, and of course the air resistance is also increased. With different humidity towels, the smoke removal rate is also different. The larger the water content, the greater the smoke removal rate. When the water content reaches 3.3 times that of the towel, the patient's endurance time is about 1 minute and 20 seconds. The test also showed that 10% to 30% of carbon monoxide can be filtered out with a 20% dry towel, and 10% to 40% of carbon monoxide can be filtered out with a 20% off wet towel. (4) If there is a fire in a high-rise building, the person living on the upper floor, when surrounded by fire and unable to go downstairs, can open the window and hang a strip outside the window to show someone in the room and use the towel as a signal for help. It is safer to jump a lot of towels into ropes and replace the safety ropes to escape the predicament. (3) What is behind the little cigarette butts? Although the cigarette head is small, the potential danger is great. The burning state of cigarettes can be divided into two types: free combustion and smoking. Of course, the two combustions are alternated. The burning of cigarettes varies depending on the type of cigarette, and the maximum temperature of combustion varies. Generally speaking, the temperature of the central part of the cigarette is as high as 800-900 ° C, and the temperature at the burning edge of the rolled paper reaches 200-300 ° C. The central temperature when smoking is higher than when it is free to burn. To keep the cigarette burning, the center must be above 700 °C. The wind speed also has an effect on the burning of cigarettes. The wind speed is 1.5 m/s, which is the easiest to burn. When the wind speed reaches 3.0 m/s, it is easy to extinguish. The free burning speed of cigarettes is also related to the position of the discharge. In the case of no wind, when it is placed horizontally, it takes 14-15 minutes to burn to the end of the cigarette filter. When it is placed vertically, it needs to be burned from bottom to top. -13 minutes. According to the test, it takes 3-7 minutes for the cigarette to cause the cotton wool and the kapok to catch fire, and it takes only about 1 minute for the acrylic fiber to catch fire. From this, it is not surprising that it is easy to cause a fire by throwing cigarette butts. According to statistics, 26% of smoking caused by household fires in Japan. Smoking caused by household fires in the United States accounted for 29.1%. Every year in these countries, many people die because of carelessness in a fire caused by smoking or throwing cigarette butts. In April 1985, a cigarette butt stunned the fire at the Harbin Swan Hotel, and 10 innocent people were buried in the sea of ​​fire. In October 1987, a cigarette butt was used to make the product of Beijing Daman Washing Machine Factory Dongba Warehouse worth 4 million yuan into ashes. The above examples illustrate the great harm caused by littering cigarette butts, and the lessons are painful. It is worth pondering and must not be numb. It is precisely: the cigarette butts are small, the damage is considerable, causing fires and hurting people. People need to keep in mind: don't throw cigarettes. (4) Gas leakage must not be switched on and off When you smell the smell of a gas leak, remember that the key to keeping your home safe is not to switch lights and other electrical equipment. The lower limit of the explosion concentration of gas, natural gas and liquefied petroleum gas is only about 4% to 5%, and the minimum detonation current is less than 70 mA. That is to say, as long as there are 4% to 5% of these combustible gases in the air and a current of less than 70 mA is encountered, it can cause combustion. Moreover, the spark energy of a 40 watt light switch contact can reach 182 mA. Therefore, the gas mixed with the air to a certain concentration is easily detonated by the electric shock of the electric light switch. In view of this, when you know that the gas leaks or suddenly smells the gas, and feel that the gas in the kitchen is leaking, do not switch the lights, electrical appliances or call the mobile phone at the scene. You must turn on and off the light switch and other electrical appliances after the air is circulated. equipment. Dope Dyed Twisted Polyester Yarn 1000D Red Polyester Yarn 60Z,Twisted Color Polyester Yarn,Dope Dyed Twisted Polyester Yarn,1000D Black Polyster Yarn Twisted ZHEJIANG GUXIANDAO POLYESTER DOPE DYED YARN CO., LTD , https://www.htpolyesteryarn.com