11 Dangerous heat sources in the workplace
There are several heat sources in the workplace that can start a fire or continue a fire in the face. Therefore, it is necessary to always have a suitable fire extinguisher on site to start the fire quickly if it moves, and to prevent casualties and financial losses. These heat sources are described below.
Chemical heat:
Respectable heat is the heat released by the complete oxidation of a substance. The amount of fuel heat is expressed in joules per gram of material. This heat is actually an exothermic chemical reaction. In this reaction, the energy required to start the reaction is less than the energy released from the reaction. Examples of exothermic reactions:
Combustion: The chemical reaction of heat between a fuel and an oxidant (oxide), usually air, which is usually associated with the release of smoke and heat. Combustion usually generates enough heat to cause light to glow or flame.
Neutralization: A chemical reaction between an acid and a base that results in the release of heat. The pH of the neutralized solution responds to the strength of the acid present.
Add water to anhydrous copper sulfate
Metal rusting reaction
Many polymerization reactions
Opinion
Decomposition of plant materials and becoming compost
Dissolution of sulfuric acid in water
Nitroglycerin explosion
Spontaneous heating:
Is the process by which a substance seeks to rise without absorbing heat from its surroundings. If the heat reaches the flash point of the substance on its own, it can start a fire on its own. For example, when greasy fabrics accumulate in commercial motorhomes, commercial premises, repair shops, and other places, oily oils generate heat in an environment where they are exposed to air, preventing this heat from escaping. Get out. The amount of transfer goes slowly up the fabric mass, and eventually, when this temperature reaches the fabric ignition point, a fire occurs. Spontaneous ignition can also be accumulated in the case of causal composts or fertilizers, as well as in coal or coal storage.
Thermal analysis:
Decomposition of a substance into its constituent parts can result in an exothermic reaction involving the chemical composition of the substance through the associated air. I usually carry explosives inside me, and even in cases surrounded by a neutral gas, it can contain acidic contaminants. The decomposition of organic matter in the air, which is accompanied by the release of carbon dioxide and water, is an exothermic reaction. The determining factor in whether a reaction occurs and how fast the reaction takes place is the activation of energy, which is the minimum energy required to start a reaction. Acetylene is an example of a compound that is released when it decomposes at room temperature.
Heat of solution:
It is called heat that is produced by dissolving compounds in a solution to form a solution. For example, when concentrated sulfuric acid is slowly added to water and a dilute solution is produced, a large amount of heat is released. Remember that water should never be added to strong acids as it is associated with a severe reaction and may cause serious harm to the individual.
Electric heating:
This type of heat is also called heating resistance because it is caused by the resistance of a current when electricity flows through it. The presence of current transmits electricity well which can do this well. Good conductors of electricity are called conductors, and weak conductors are called insulators. In fact, the higher the resistance of a material to pass current through it, the stronger the electrical insulation material. For example, in electric heaters, electric stoves, hair dryers and steam irons, electric elements are used to generate heat. The material of the element is usually based on nickel or iron, which is combined with other elements and will vary depending on the type of use and heat required. The presence of such electric heating equipment can be associated with hazards such as fire, so safety and safety issues about them must be well observed.
Arc:
An electric current is short, strong, and very luminous, and occurs when a strong electric current jumps in the distance between two electrodes or inside a circuit. Electric arcs produced on special electrodes are able to generate very bright light and heat that can be used to create light and welding. An energy arc is useful, however an unwanted electric arc can damage equipment such as bearings or people. When there is an alternating current or alternating current between two pieces of wire due to the presence of bare wires and decay, which becomes a sheath of electrical wires, a strong electric current may be generated between them, which can start a fire. Be. Be.
sparking:
Occurs when a very strong voltage is generated for a weak energy output.
Stationary electric charge:
Electricity is collected on the surface of two materials that are in contact with each other and then separate.
Lightning:
The electric charge in the clouds causes lightning due to the difference in electric charge between the clouds or between the clouds of the earth. Every year, about 2,000 people around the world die from lightning. Other people who survived the lightning strike
