LNG Storage And Transportation System Very Low Temperature
The LNG storage system is a liquid mixture of methane, which generates white vapor clouds due to the heat transfer of the ground and air. Natural gas is lighter than air. LNG Storage And Transportation System Will spread rapidly in the air. When the fire burns, the flame spreads to the oxygen place. The combustion rate of natural gas is slower than other combustible gases, about 0.3m/s, and the combustion vapor will prevent further formation of vapor clouds and then form stable combustion.
The formation of the clouds under the pressure of less than 5kPa, generally do not cause a great explosion hazard. When the mixture ratio of natural gas to air is in the range of 5%-15% (percentage of volume), explosions occur.
LNG storage and transportation system at the standard atmospheric pressure has a very low temperature, LNG Storage And Transportation System the initial phase of the leakage will absorb the ground and the ambient heat in the air rapidly gasification. But after a certain amount of time, LNG Storage And Transportation System the ground was frozen. Ambient air temperatures will drop rapidly without convection. At this time the gasification speed slows down, even can occur partially liquid too late gasification and is Khanati impound. LNG storage System leakage after the cold vapor clouds or too late gasification of liquids will produce low-temperature burning, frostbite and other hazards.
If the operator does not have adequate protection measures, under 10 ℃ lasting, there will be a low temperature anesthesia risk, with the body temperature decreased physiological function and mental activity decreased, LNG Storage And Transportation System cardiac function failure, further decline will cause death.
LNG storage and transportation system after leakage of cold vapor clouds, too late gasification of liquids or splashes of liquids, but also make contact with some of the material brittle, brittle, or produce cold contraction, fragile material fracture and cold contraction, will be the filling station equipment such as storage, submersible pumps, LNG storage and transportation system high-pressure plunger pumps, gas-filling machine, add-in-car hazards, in particular LNG storage tanks and LNG storage system tanker tank can cause brittle cracking or deformation, resulting in vacuum failure, cooling performance reduction failure, This causes the inner barrel liquid expansion to cause the bigger accident.
Although the LNG transportation system itself is not toxic, LNG Storage And Transportation System it can cause suffocation in the enclosed area because of bad ventilation. Because pure natural gas is colorless, tasteless, odorless, the body can not rely on its own organs to feel the existence of natural gas (because of different parts of natural gas, such as liquefied natural gas containing benzene or other substances, so may smell). LNG Storage And Transportation System If there is no good ventilation environment, natural gas can replace the oxygen in the air, forming the anoxic air that cannot survive. In addition, inert gases (such as nitrogen) accumulate in a limited space and exceed a certain concentration, which can lead to suffocation accidents.
Under normal circumstances, the oxygen content in the air is 21%, whether because of combustion or oxygen is replaced by the formation of hypoxia air, LNG Storage And Transportation System the human body is harmful, so LNG storage and transportation system to the gas station should have corresponding precautions.
When people are in the air with oxygen LNG Storage And Transportation System content only for 8, the human nervous system will be harmed. In fact, people immediately lose consciousness without being vigilant at all.
When the oxygen content in the air is less than 16%, the burning flame is usually extinguished. When the oxygen content is lower, the person loses the sense of azimuth. A series of symptoms are drowsiness, tiredness, no direction, illusion, and the emergence of inexplicable excitement, thus losing the vigilance of danger.