Potential safety hazards in college students' daily life include:

(A) Common hidden dangers

1. classroom fire hazard

(1) The door is blocked or only one door is opened;

(2) Use high-power lighting or electric heating appliances to keep warm near flammable materials;

(three) the use of electronic teaching AIDS in violation of operating rules;

(4) line aging or overload;

(five) failing to store flammable items in accordance with safety regulations;

(6) Smoking and littering cigarette butts in the classroom.

2. The fire danger of the library

(1) wires and electrical equipment are short-circuited;

(2) accidental lighting such as matches and lighters;

(3) Smoking and littering cigarette butts;

(4) The evacuation passage is not smooth.

3. Fire hazards in dormitories

(1) Using inferior electrical appliances:

(2) illegal use of high-power electrical equipment, making the line overloaded;

(3) connecting wires privately;

(4) Smoking in bed:

(5) light candles and read in mosquito nets;

(six) unauthorized use of kerosene stoves, liquefied gas stoves, alcohol stoves and other appliances that may cause fire;

(7) Burning sundries:

(8) The desk lamp is close to pillows and bedding;

(9) The mobile phone charger charges on the bed.

5. Fire hazard in auditorium and lecture hall

(1) wire aging:

(2) throwing cigarette butts;

(3) High-power lighting is close to curtains or flammable decorations;

(four) the illegal use of open flames;

(5) The emergency doors and evacuation passages are blocked;

(6) The number of people in the venue seriously exceeds the rated number.

(2) Fire prevention

1. Fire prevention in student dormitory (fire safety in student dormitory should be absolutely prohibited)

(1) Don't pull the wire without permission.

(2) It is forbidden to smoke and throw cigarette butts in bed.

(3) It is forbidden to occupy or block the evacuation passage.

(4) It is forbidden to burn sundries in the building.

(5) Flammable and explosive articles are not allowed to be brought indoors.

(6) Electric heating equipment such as "quick heating" is not allowed.

(7) It is forbidden to use open flame appliances such as alcohol stoves.

(8) It is forbidden to change the power supply equipment without authorization.

(9) Don't leave the dormitory without turning off the power.

(10) Don't damage fire extinguishers and fire-fighting facilities.

2. Fire prevention of common electrical appliances

(1) Causes of fire caused by hair dryer and fire safety measures

1) the cause of the fire caused by the hair dryer

First, when the hair dryer is in use, I have to go away because of other things (such as answering the phone, someone knocking at the door, etc.). ) I put the hair dryer on the wooden table for a while and completely forgot the purpose of the hair dryer. As a result, it was put on hold for a long time, so the high temperature of the hair dryer shell ignited the combustible.

Second, when using the hair dryer, if you encounter power failure, you should handle other things or go out without cutting off the power supply. After the power supply is restored, the heating wire of the hair dryer heats up for a long time, and the temperature rises, causing a fire.

2) hair dryer fire safety measures:

First, power sockets and wires should meet fire safety requirements, and the connection should be tight and firm.

2. Beware of knocking, bumping and disassembling the hair dryer, so as not to damage the heating elements and insulation devices, causing leakage or even short circuit and fire.

Third, people can't leave when using the hair dryer, and can't put it on flammable materials such as benches, sofas and mattresses at will.

Fourth, be sure to cut off the power supply in time after use.

(2) The causes of fire caused by incandescent lamps and fire safety measures.

1) incandescent lamp causes fire:

First, the surface temperature of incandescent bulbs is very high, which can bake combustible materials in contact or close to them. Under general heat dissipation conditions, the surface temperature of incandescent bulbs increases with the increase of their power. For example, for incandescent lamps with power of 40 watts, 100 watts and 200 watts, the bulb surface temperature can reach 50-60 degrees Celsius, 170-200 degrees Celsius and 160-300 degrees Celsius respectively. Such as wood, paper, cotton cloth, firewood, etc. , are low ignition point, if close to the light bulb is energized, it is easy to bake and catch fire. The test shows that the 200-watt incandescent lamp clings to the wooden box and can bake the wooden box in less than 1 hour. If you hold the cotton-padded coat tightly, it will catch fire in only 5 minutes. The greater the power of the bulb, the longer the turn-on time, the higher the surface temperature of the bulb, the lower the ignition point of combustible materials, and the closer the distance between them, the easier it is to cause combustion.

Second, because the power supply voltage is too high, the bulb power is too large, the load capacity of the conductor is small, and the insulation is aging, which leads to overheating, short circuit and fire.

Thirdly, because the power supply voltage is too high and the filament calorific value is too high, the inert gas inside the bulb expands violently, or the bulb with high power and high surface temperature is quenched and heated, splashed with water and vibrated. , causing the light bulb to explode, and the high-temperature glass sheet and high-temperature filament splashed on the combustible, causing a fire.

Fourth, because the contact part of the lamp holder is in poor contact, it leads to fever and fire; When the glass shell of the lamp holder is loose, the lamp holder is twisted, which leads to short circuit and fire.

2) incandescent lamp fire safety measures:

A, the light bulb should be set in a safe and appropriate place, and keep a certain fire distance with combustible materials. Where collision may occur, the light bulb should have a metal protective net or a glass cover.

Second, it is forbidden to cover lamps with paper, cloth or other combustible materials, and it is forbidden to use light bulbs to keep warm and bake clothes under quilts.

Third, light bulbs should not be attached to wooden furniture, doors, frames or cardboard, nor embedded in the ceiling or ceiling. When moving the desk lamp, the light bulb should keep a certain distance from flammable materials such as curtain cloth and mosquito net.

Fourth, the power supply voltage of incandescent lamp can't exceed its rated voltage. Don't touch the working light bulb with wet hands or wet cloth to prevent the light bulb from exploding. If the connection between the lamp holder and the glass bulb is loose, don't twist the bulb hard. If you use a light bulb above 150 watt, don't use a bakelite lamp holder to avoid heating and fire.

Fifth, the wires used for incandescent lamps should have excellent insulation performance. The conductor shall not be close to the bulb to prevent the insulation layer of the conductor from aging, melting and burning due to long-term baking. Safety devices should be installed on the lines to protect them. The switch shall not be installed on the ground wire.

Sixth, when using incandescent lamps, especially high-power incandescent lamps, the continuous power-on time should not be too long, and the "ever-burning lamp" should not be lit. Remember to turn off the lights when you go out to class.

(3) Causes of fire caused by fluorescent lamps and fire safety measures.

1) Causes of fire caused by fluorescent lamp ballast:

First, the quality of ballast is poor. Some ballasts have not been strictly inspected or wound by themselves before leaving the factory, which are shoddy and have poor quality, such as insufficient coil turns, insufficient insulation capacity, too small wire diameter, too small wire core area, too large space gap, and too tight insertion of silicon steel sheets. These are easy to make ballast heat up, produce high temperature, damage insulation, melt asphalt, overflow from the box and so on. , forming a short circuit, causing a fire.

Second, the ballast is improperly installed. For example, the power of ballast and fluorescent lamp is not matched, the contact is not firm, the ballast is installed near the ceiling and other flammable materials, and the ventilation and heat dissipation conditions at the installation site are very poor. In this way, on the one hand, the ballast is easy to heat, on the other hand, the heat is not easy to dissipate, so a large number of sudden heat, forming a high temperature, baking flammable substances, causing fires.

Third, improper use. Excessive power supply voltage and overload of fluorescent lamps will lead to excessive ballast temperature, too long continuous use of fluorescent lamps or too frequent switching of fluorescent lamps will also lead to excessive ballast temperature, and even lead to fire.

Fourth, poor maintenance. A lot of combustible dust, sawdust, etc. Accumulated on the ballast of fluorescent lamp, if the ballast produces high temperature, it will be burnt and caught fire; When ballast is wet or flooded, it will reduce the insulation capacity of the coil and even short circuit and fire. These are caused by poor maintenance at ordinary times.

2) Fire safety measures for fluorescent lamp ballast:

First, we should choose high-quality and qualified products. The power of fluorescent lamps and ballasts should be matched, and ballasts without certificates cannot be used or wound by themselves. If the ballast hums after being electrified, it means that the quality is poor and it is easy to generate heat; if the ballast generates heat after being electrified for half an hour, it means that the ballast quality is not good.

Second, when installing fluorescent lamps, ballasts cannot be directly installed on combustible materials. Attention should be paid to ventilation, rain and dust prevention. The bottom of ballast should be upward, not downward and not vertically installed to prevent asphalt from melting and overflowing.

Third, inspection and maintenance should be strengthened in use to prevent the power supply voltage from being too high or overloaded. Fluorescent lamps should not be switched on and off frequently, nor should they be used continuously for a long time to prevent the ballast from overheating. If it is found that the contact point is loose, the ballast makes noise, and it is hot or has a burning smell when it is in contact, measures should be taken to deal with it. People should cut off the power when they leave.

3. Causes and precautions of cigarette butts causing fire

(1) Causes of fire caused by cigarette butts

Although cigarette butts are not a big fire source, they can cause many substances to catch fire. The surface temperature of cigarette butts is 200~C-300~C, and the center temperature is 700 ~ C-800 ~ C The ignition point of general combustibles is mostly lower than the surface temperature of cigarette butts, such as 130~C for paper, 200~C for cloth and 250~C for loose. The burning time of a cigarette is 4 ~ 15 minutes. During this period, ordinary combustible materials can be ignited, and after a period of smoldering, they will catch fire and burn. According to the experiment under the condition of natural ventilation, cigarette butts will start to burn after 75 ~ 90 minutes when they are thrown into sawdust 5 cm deep. When they are thrown into sawdust with a depth of 5 ~ 10 cm, there is a 75% chance that they will start burning after 60 ~ 100 minutes. For dangerous chemicals, the open flame of cigarettes will immediately cause them to burn and explode.

(2) Fire prevention measures that should be paid attention to when smoking:

1) Don't smoke on the bed or sofa;

2) When smoking, if you have other things to go out temporarily, you should put out your cigarette butts before you leave.

3) Cross matchsticks and cigarette butts must be extinguished. Unburned matchsticks and cigarette butts should be put into ashtrays or spittoons: matchboxes and cigarette cases should not be used as ashtrays, cigarette butts and cigarette butts should not be thrown into wastepaper baskets, and they should not be thrown around.

4. Fire prevention measures that mosquito repellent should pay attention to.

In summer, especially at night, people often drive away mosquitoes, but when using open flames to drive away mosquitoes, a little carelessness will cause a fire. Therefore, special attention should be paid to fire prevention when repelling mosquitoes.

(1) The lit mosquito-repellent incense should be placed on a metal bracket, away from flammable materials such as curtains and door curtains, and never placed directly on wooden boards or other flammable materials.

(2) After the homemade mosquito-repellent incense is lit, it should be placed in a basin with a brick pad at the bottom.

(3) When lighting the fire to repel mosquitoes, someone should take care of it, so that people will go out.

(4) For safety, it is best to use "mosquito killer" or electronic mosquito repellent.