On March 30, a forest fire broke out in Muli County, Liangshan Prefecture, Sichuan Province. However, like April 1st April Fool's Day, God seems to have made a joke with us, and found the remains of 30 firefighters who lost the connection in the fire. At that time, the people of the whole country were shocked and the whole country was hurt. Let us remember these 30 heroes forever.
We have always emphasized that fire protection is the top priority of fire protection and is also targeted at our laboratories. So how should we prevent and deal with laboratory accidents? Come and see, increase your knowledge!
1. Strengthen fire management and improve fire awareness
First of all, it is necessary to formulate a sound emergency response plan and standardize emergency handling procedures. Conduct field drills according to the plan to improve the skills of fire fighting and evacuation in the early stage of the accident. Secondly, carry out the necessary fire safety publicity and education for the experimental personnel; third, the fire safety person in charge of the chemical laboratory should fully understand the fire safety and fire extinguishing knowledge, be familiar with the emergency evacuation plan, and have certain emergency guidance and fire fighting command capability; It is necessary to strengthen the emphasis on the fire safety of chemical laboratories, and to do frequent inspections and special investigations during special periods.
2. The correct way to deal with
(1) Preventing explosion
Chemical laboratories, especially in organic chemistry laboratories, are mostly flammable, explosive materials or mixtures thereof. When using these substances, the most important thing is the accumulation and sudden release of a large amount of flammable, explosive substances, pressure and heat. In the experiment, the following measures can be taken to prepare for:
a. Try to use safer reagents.
b. Use explosive substances, the amount of single use should be as small as possible, and at the same time be prepared.
c. There is no flammable substance around flammable or explosive materials. Explosive items should be protected against sudden vibration and overheating.
d. If there is a dangerous reaction to explosion or fire, it is necessary to carry out several small-scale tests first, and then gradually enlarge.
e. For the exothermic reaction, the addition of the reactants is carried out stepwise, a small number of times.
f. Distillation and reflux of organic solvents to avoid overheating and bumping.
(2) Preventing fire
First of all, it is necessary to clarify the level of flammable substances and develop measures to prevent accidents. Many of the chemicals produced during the experiment are flammable, especially organic solvents, which are highly volatile and extremely flammable. Operation with flammable organic solvents must be carried out in a ventilated kitchen to avoid accumulation of organic solvent vapors in the laboratory. The laboratory can not store a large amount of organic solvents, and there must be a well-ventilated storage room.