Fire prevention of gas stations and product oil depots
the need for urban development has led to an increase in the number of gas stations and oil depots in and around the city, and the imperfections of modern facilities and corresponding fire-fighting plans have led to frequent fire accidents. Due to the physical and chemical characteristics of refined oil itself, it is more urgent to formulate relevant fire-fighting plans and improve knowledge
fire characteristics of gas stations and product oil depots
there are many residents near gas stations and oil depots, and there are many dangerous points in the storage and transportation of oil products. The stored oil and gas are flammable and explosive hydrocarbon mixtures. Oil, gas, fire and electricity are intertwined every year, which has a great fire risk, and combustion and explosion often occur together. Therefore, it is very important to do a good job in fire prevention and extinguishment in case of fire
due to the low flash point, ignition point and spontaneous combustion point, the product oil is easier to burn than coal, wood and other substances. Therefore, there is a great fire risk in the process of transportation and storage.
when the vapor of oil products reaches the explosion limit in the air, it can explode in case of fire. The lower the explosion limit, the greater the danger. In the process of ignition, combustion and explosion often alternate. Generally, explosion occurs first, and then combustion occurs; When the explosion limit is exceeded, it will burn first in case of fire source, and then explosion will occur when the concentration drops to the explosion limit. Containers containing oil products, if close to high temperature or exposed to sunlight, will expand and crack due to heat, increasing the risk of fire. The fire site and the oil drums near it are affected by the radiant heat of the flame. If it is not cooled in time, the fire will increase due to expansion and explosion, and the scope of the disaster will be expanded
natural gas, gasoline, kerosene and other fires during storage and transportation are of great danger
when a fire occurs in the oil tank storing oil in the oil depot, the temperature of the flame center reaches 1050 ~ 1400 ℃, and professional technicians are sent to the user's site in time, and the tank wall temperature reaches more than 1000 ℃. The heat radiation intensity of oil tank fire is directly proportional to the time of fire. The higher the calorific value of oil, the higher the flame temperature, the greater the radiant heat intensity. Strong thermal radiation is easy to cause the combustion of adjacent oil tanks and other combustibles, and also seriously affect the fire fighting action.
If a fire occurs in a gas station in the city, once it cannot be controlled, it will spread very quickly due to its geographical location, which is easy to cause a large-scale fire. Product oil tank fire, accompanied by tank explosion, oil boiling, splashing and dispersion, will cause a large-scale fire in the tank area
after extinguishing the fire, if the durable polymers such as TPU, polycarbonate and nylon that do not cut off more combustible gases will win more market share in the next 10 years, and the gas source and liquid source of flammable and combustible liquids, there will be re ignition and re explosion when encountering fire source or high temperature. For oil tanks and oil pipelines after fire fighting, if the wall temperature is too high, it will cause the combustion of oil products again if the cooling is not continued
2. Causes of fire
natural gas, steam, coal and diesel have their own fire hazards and fire characteristics, and there are many reasons for fires in production operations.
(1) cooking with fire, matches, lighters or other open flames and all kinds of smoldering combustion without flame
(2) exhaust pipe of internal combustion engine, boiler shell and rotating parts of power equipment
(3) chimney or adjacent fire site flying fire, impact sparks, friction and electric welding slag, etc
(4) electric sparks, arcs, overheating caused by circuit opening or cutting, short circuit, overload, excessive contact resistance, etc., non explosion-proof electrical equipment used in explosion-proof places, lightning discharge and electrostatic sparks, etc
Brinell hardness is expressed in hb[n (kgf/mm2)] (hbshbw) (refer to gb/t231-1984) (5) corrosion of production equipment and pipelines, fluctuation of production pressure, fatigue damage of equipment and pipelines caused by mechanical vibration in the production process, etc
in case of fire in gas stations and product oil depots, different collets are adopted for different samples to prevent the occurrence of fire accidents, which will affect production to varying degrees, endanger the life safety and physical and mental health of employees, cause losses to national property, and have an impact on society and families. To ensure the fire safety of product oil depots and gas stations in cities, the first thing is to do a good job of prevention
1. Implement laws and regulations
in the process of receiving and distributing oil products, we should carefully implement various fire protection laws and regulations, implement the level by level fire safety system and post fire safety system, clarify the level by level and post fire safety responsibilities, determine the fire safety personnel at all levels and posts, correctly perform the fire safety responsibilities, and firmly establish the fire safety subject consciousness of "safety self grasp, hidden dangers self elimination, self responsibility"